ALKERMES INC
10-K, 1997-06-27
PHARMACEUTICAL PREPARATIONS
Previous: ALKERMES INC, DEF 14A, 1997-06-27
Next: OUTBACK STEAKHOUSE INC, NT 11-K, 1997-06-27



<PAGE>   1
                                  UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                    FORM 10-K
(Mark One)

[X]      ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES
         EXCHANGE ACT OF 1934

                    For the fiscal year ended March 31, 1997

                                       OR

[ ]      TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES
         EXCHANGE ACT OF 1934

         For the transition period from ___________to _________

Commission file number 0-19267

                                 ALKERMES, INC.
             (Exact name of registrant as specified in its charter)

             Pennsylvania                                23-2472830
    State or other jurisdiction of          (I.R.S. Employer Identification No.)
    incorporation or organization

      64 Sidney Street, Cambridge, MA                    02139-4234
(Address of principal executive offices)                 (Zip Code)

Registrant's telephone number, including area code (617) 494-0171
Securities registered pursuant to Section 12(b) of the Act: None

Securities registered pursuant to Section 12(g) of the Act: Common Stock, par
value $.01 per share ("Common Stock") 
                        1994 Class A Warrants to purchase shares of Common Stock
                        --------------------------------------------------------
                                             (Title of Class)

         Indicate by check mark whether the Registrant (1) has filed all reports
required to be filed by Section 13 or 15(d) of the Securities Exchange Act of
1934 during the preceding 12 months (or for such shorter period that the
Registrant was required to file such reports), and (2) has been subject to such
filing requirements for the past 90 days. Yes X   No ___

         Indicate by check mark if disclosure of delinquent filers pursuant to
Item 405 of Regulation S-K (Section 229.405 of this chapter) is not contained
herein, and will not be contained, to the best of Registrant's knowledge, in
definitive proxy or information statements incorporated by reference in Part III
of this Form 10-K or any amendment to this Form 10-K. [ ]

         Based upon the last sale price of the Registrant's Common Stock on June
6, 1997, the aggregate market value of the 19,366,270 outstanding shares of
voting and non-voting common equity held by non-affiliates of the Registrant was
$331,647,374.

         As of June 6, 1997, 20,765,518 shares of the Registrant's Common Stock
were issued and outstanding.

                       DOCUMENTS INCORPORATED BY REFERENCE

         Portions of the following documents are incorporated by reference in
this Report on Form 10-K:

         1)       Proxy Statement dated June 27, 1997 for the Registrant's
                  Annual Shareholders' Meeting to be held on July 25, 1997 (Part
                  III).
<PAGE>   2
                                     PART I

ITEM 1.  BUSINESS

GENERAL

         Alkermes, Inc. (together with its subsidiaries, "Alkermes" or the
"Registrant"), a Pennsylvania corporation organized in 1987, is applying the
tools of biotechnology to the development of sophisticated proprietary drug
delivery systems. The Registrant is developing product candidates based on three
independent drug delivery technologies: ProLease(R), which is designed to enable
single injections lasting a few days to several months to be made of proteins or
peptides otherwise given by more frequent injection; RMP-7(TM), which is
designed to enable increased drug delivery to the brain by transiently opening
the blood-brain barrier; and Medisorb(R), which extends Alkermes' technology for
injectable sustained release and is designed for more traditional small molecule
pharmaceutical compounds. Utilizing these drug delivery systems, the Registrant
is currently in various stages of preclinical and clinical development of
several product candidates.

OVERVIEW OF DRUG DELIVERY

         Drug delivery companies apply proprietary technologies to create new
pharmaceutical products based on drugs developed by others. These products are
generally novel, cost-effective dosage forms that provide any of several
benefits including control of drug concentration in the blood, improved safety
and efficacy, improved patient compliance and ease of use and expanded
indications. Drug delivery technologies can provide pharmaceutical companies
with a means of developing new products as well as expanding existing drug
franchises.

         The drug delivery industry emerged to address the opportunities for
advanced delivery of traditional pharmaceutical compounds. These compounds are
generally stable, small molecules manufactured by conventional synthetic
methods, for which oral or transdermal (through the skin) delivery could be
enabled or enhanced by drug delivery technologies. Technologies such as passive
transdermal systems (patches) and advanced tablets and capsules have been
developed and successfully applied to a range of pharmaceutical products. In
addition, certain traditional small molecule pharmaceuticals are delivered by
means of encapsulation in polymeric microspheres.

         With the advent of biotechnology, new opportunities in drug delivery
have arisen. Advances in biotechnology have facilitated the development of a new
generation of biopharmaceutical products based on proteins, peptides and nucleic
acids. At the same time, the scientific tools of biotechnology have enabled new
approaches to drug delivery based on exploiting particular biological phenomena,
for example utilizing natural properties of the blood-brain barrier to
facilitate drug delivery to the central nervous system.

         Proteins and peptides present drug delivery challenges because they are
often large molecules which degrade rapidly in the bloodstream, have limited
ability to cross cell membranes and generally cannot be delivered orally. As a
result, many biopharmaceuticals must be administered by injection, often
multiple times per day or per week. Consequently, the methods of administration
of

                                        2


<PAGE>   3

biopharmaceuticals can limit their clinical applications to certain disease
states that warrant the expense and inconvenience of frequent injection.

         Drug delivery to the central nervous system is complicated by the
existence of the blood-brain barrier, the layer of tightly joined endothelial
cells which comprise the walls of the capillaries of the brain and limit the
free flow of many blood constituents into the brain. Many drugs cannot easily
cross the blood-brain barrier, and therefore must be administered in relatively
high doses that may result in systemic toxicity or high cost. Drugs with limited
ability to cross the blood-brain barrier include many water soluble
chemotherapeutic and anti-infective agents that are frequently used in the
treatment of diseases outside of the central nervous system.

BUSINESS STRATEGY

         Alkermes' business strategy is to develop and acquire drug delivery
systems to address significant new drug delivery opportunities arising in the
pharmaceutical industry. There are four key elements to Alkermes' strategy:

         Develop and Acquire Broadly Applicable Drug Delivery Systems and Apply
Them to Multiple Pharmaceutical Products. The Registrant develops or acquires
drug delivery systems that have the potential to be applied to multiple
proteins, peptides and small molecule pharmaceutical compounds to create new
product opportunities. For example, the Registrant has developed RMP-7
technology independently and acquired the ProLease and Medisorb technologies.
The Registrant currently has several product candidates utilizing those
technologies in development.

         Collaborate to Develop and Finance Product Candidates. In addition to
conducting product development activities on its own, the Registrant has entered
into collaborations with pharmaceutical and biotechnology companies and others
to develop product candidates incorporating the Registrant's technologies,
provide capital for product development independent of capital markets and share
development risk. Currently, the Registrant is collaborating with major
pharmaceutical companies, including Genentech, Inc. ("Genentech"),
Schering-Plough Corporation ("Schering-Plough"), Johnson & Johnson and Janssen
Pharmaceutica International ("Janssen").

         Apply Drug Delivery Systems to Both Approved Drugs and Drugs in
Development. The Registrant is applying its drug delivery technologies to novel
applications and formulations of pharmaceutical products that have already been
approved by the FDA or other regulatory authorities. In such cases, the
Registrant and its partners can develop a novel dosage form or application with
the knowledge of a drug's safety and efficacy profile and a body of clinical
experience from which to draw information for the design of clinical trials and
for regulatory submissions. The Registrant is also applying its technologies to
new pharmaceuticals that require a sustained release delivery system for
successful development.

         Establish Independent Product Development Capabilities. Alkermes has
assembled its own product development organization to enable it to develop
product candidates for itself and its collaborators based on its drug delivery
technologies. This capability gives the Registrant flexibility in structuring
development programs and the ability to conduct both feasibility studies and
clinical development programs for its collaborators. For example, the Registrant
has developed RMP-7

                                        3


<PAGE>   4

independently and is currently conducting clinical trials of ProLease human
growth hormone ("hGH") for Genentech.

DRUG DELIVERY TECHNOLOGY

         The Registrant's current focus is on the development of broadly
applicable drug delivery technologies addressing two important drug delivery
opportunities: injectable sustained release of proteins, peptides and small
molecule pharmaceutical compounds, and drug delivery to the brain across the
blood-brain barrier. The Registrant is developing product candidates based on
three independent drug delivery technologies.

         ProLease: injectable sustained release of fragile proteins and peptides

         ProLease is Alkermes' proprietary technology for the stabilization and
encapsulation of fragile proteins and peptides in microspheres made of common
medical polymers. The Registrant's proprietary expertise in this field lies in
its ability to preserve the biological activity of fragile drugs over an
extended period of time and to manufacture these formulations using components
and processes believed to be suitable for human pharmaceutical use. ProLease is
designed to enable novel formulations of proteins and peptides by replacing
frequent injections with controlled, sustained release over time. The Registrant
believes ProLease formulations have the potential to improve patient compliance
and ease of use by reducing the need for frequent self-injection, to lower costs
by reducing the need for frequent office visits and to improve safety and
efficacy by reducing both the variability in drug levels inherent in frequent
injections and the aggregate amount of drug given over the course of therapy. In
addition, ProLease may provide access to important new markets currently
inaccessible to drugs that require frequent injections or are administered
orally.

         The ProLease formulation process has been designed to assure stability
of fragile compounds during the manufacturing process, during storage and
throughout the release phase in the body. The formulation and manufacturing
process consists of two basic steps. First, the drug is formulated with
stabilizing agents and dried to create a fine powder. Second, the powder is
microencapsulated at very low temperatures. Incorporation of the drug substance
as a stabilized solid under very low temperatures is critical to protecting
fragile molecules from degradation during the manufacturing process and is a key
element of the ProLease technology. The microspheres are suspended in a small
volume of liquid prior to administration to a patient by injection under the
skin or into a muscle. The Registrant believes drug release from the ProLease
drug delivery system can be controlled to last from a few days to several
months.

         Drug release from the microsphere is controlled by diffusion of the
drug through the microsphere and by biodegradation of the polymer. These
processes can be modulated through a number of formulation and fabrication
variables including drug substance and microsphere particle sizing and choice of
polymers and excipients.

         The Registrant's experience with the application of ProLease to a wide
range of proteins and peptides has shown that high incorporation efficiencies
and high drug loads can be achieved. Proteins and peptides incorporated into
ProLease microspheres have maintained their integrity, stability and

                                        4


<PAGE>   5

biological activity for up to 30 days in in vitro experiments conducted on
formulations manufactured at the preclinical and clinical trials scale.

         The results of animal studies with several different ProLease
formulations have shown that ProLease can release targeted levels of drugs over
extended periods of time and that the pharmacodynamic response with ProLease
formulations can match that of continuous drug infusion. Suitable in vivo
delivery patterns in rodents and primates have been achieved with different
therapeutic proteins. In July 1996, Alkermes' scientists and their collaborators
published results of primate studies of ProLease hGH in Nature Medicine, a
peer-reviewed scientific journal. These results showed that single injections of
ProLease hGH could provide sustained release and biological effect of hGH in
primates for several weeks.

         RMP-7: drug delivery across the blood-brain barrier

         RMP-7, a member of a family of Receptor-Mediated Permeabilizers(TM)
("RMPs(TM)"), is a nine amino acid peptide based on bradykinin, a compound
occurring naturally in the body and known to affect vascular permeability. RMP-7
is a proprietary, synthetic analog of bradykinin developed by Alkermes to
increase transiently the permeability of the blood-brain barrier. Following
injection, RMP-7 increases permeability by triggering a brief relaxation of the
tight cellular junctions of the blood-brain barrier. During the time the tight
junctions are relaxed, permeability is increased and drug molecules in the
bloodstream can diffuse into the brain in concentrations greater than can
usually be achieved without RMP-7. Preclinical and clinical data also suggest
that RMP-7 increases the uptake of pharmaceuticals in the region of brain tumor
and other pathology.

         RMP-7 exerts a pharmacologic effect on the vasculature of the brain and
does not itself bind to or serve as a carrier for the drug of which it is
facilitating delivery. The Registrant is developing RMP-7 to be manufactured,
packaged and dispensed as a standalone product. In the clinical setting, RMP-7
is administered in conjunction with the therapeutic or diagnostic agent. Timing
of RMP-7 administration relative to that of the therapeutic or diagnostic agent
is determined on a drug by drug basis to optimize barrier permeability during
the time of peak drug plasma concentrations.

         RMP-7 is intended to be marketed as an independent agent to increase
the utility of other therapeutic and diagnostic compounds given with it. The
Registrant believes RMP-7 may be administered along with cancer chemotherapeutic
and anti-infective agents not currently used in the treatment of central nervous
system disorders because of their limited ability to penetrate the blood-brain
barrier.

         Medisorb: injectable sustained release of traditional small molecule
pharmaceuticals

         Medisorb is a proprietary technology for encapsulating traditional
small molecule pharmaceuticals in microspheres made of common medical polymers.
Like ProLease, Medisorb is designed to enable novel formulations of
pharmaceuticals by providing controlled, sustained release over time. The
Registrant believes Medisorb is suitable for encapsulating stable, water
soluble, small molecule pharmaceuticals at a large scale. The Registrant
believes that Medisorb formulations may have superior features of safety,
efficacy, compliance and ease of use for drugs currently administered by
frequent injection or administered orally. Drug release from the microsphere is
controlled by

                                        5


<PAGE>   6

diffusion of the pharmaceutical through the microsphere and by biodegradation of
the polymer. These processes can be modulated through a number of formulation
and fabrication variables, including drug substance and microsphere particle
sizing and choice of polymers and excipients.

         The Medisorb drug delivery system uses manufacturing processes
different from the ProLease manufacturing process. The formulation and
manufacturing process consists of three basic steps. First, the drug is combined
with a polymer solution. Second, the drug/polymer solution is mixed in water to
form liquid microspheres (an emulsion). Third, the liquid microspheres are dried
to produce finished product. The microspheres are suspended in a small volume of
liquid prior to administration to a patient by injection under the skin or into
a muscle. Drug release from Medisorb can be controlled to last from a few days
to several weeks.

PROLEASE

         Product Development Strategy. The Registrant's strategy is to generate
multiple product opportunities by applying ProLease technology to the
development of superior formulations of proteins and peptides that the
Registrant believes address significant market opportunities. The Registrant
believes these formulations have the potential to expand the utilization of
these products and improve the competitive advantage of its collaborators in
major markets.

         The product development plan for individual ProLease formulations is
expected to proceed in several stages. First, the Registrant, either on its own
or pursuant to a collaboration, conducts initial feasibility work to test
various ProLease formulations for a particular drug in vitro and in vivo.
Following the successful completion of the feasibility stage, preclinical
development and manufacturing scale-up activities directed toward the initiation
of clinical trials of the ProLease formulation would be conducted in
collaboration with a partner.

         ProLease Human Growth Hormone. Alkermes is developing a ProLease
formulation of Genentech's hGH in collaboration with Genentech. Growth hormone
deficiency results in short stature and potentially other developmental defects.
Genentech is the leading supplier of hGH in the United States. hGH is approved
for use in the treatment of children with growth hormone deficiency, Turner's
syndrome, chronic renal insufficiency and other indications and is being tested
in additional indications in adults. hGH is currently administered frequently,
often daily, by subcutaneous injection.

         In February 1996, Alkermes commenced a Phase I clinical trial of
ProLease hGH in 13 growth hormone deficient adults. The study was completed in
August 1996. In November 1996, Alkermes commenced a multi-center Phase I/II
clinical trial of ProLease hGH in growth hormone deficient children. The trial
is being conducted in up to 11 medical centers in the United States and is
expected to enroll up to 62 patients.

         ProLease Alpha Interferon. Alkermes is developing a ProLease
formulation of Schering-Plough's Intron(R) A (interferon alpha 2b) product in
collaboration with Schering-Plough. Schering-Plough is the leading supplier of
alpha interferon in the world. Intron A is approved for use in several
infectious diseases and certain oncology indications. Intron A is currently
administered by

                                        6


<PAGE>   7

frequent injection. Schering-Plough is conducting preclinical studies and will
be responsible for clinical development.

         ProLease Product for Hormone Mediated Disorders. Alkermes is developing
a ProLease formulation of a product for the treatment of hormone-mediated
disorders with Johnson & Johnson. The product development program was announced
in November 1996 following the successful completion by Alkermes of a
feasibility study initiated in early 1996. Johnson & Johnson is conducting
preclinical studies and will be responsible for clinical development.

         Additional ProLease Formulations. Alkermes continues to develop
Prolease formulations of other unspecified compounds pursuant to feasibility
agreements with several pharmaceutical and biotechnology companies.

RMP-7

         Product Development Strategy. The Registrant's strategy to date has
been to advance RMP-7 through clinical trials while establishing its safety,
permeability effects in humans and efficacy when used in combination with other
drugs. To support the clinical development of RMP-7, Alkermes formed, and
transferred substantially all of its rights to the RMP(TM) technology to,
Alkermes Clinical Partners, L.P. (the "Partnership"), which completed a $46
million unit offering in April 1992. Alkermes has the option to purchase all of
the limited partnership interests in the Partnership. See "Collaborative
Arrangements -- Alkermes Clinical Partners, L.P."

         RMP-7 has the potential to be used in combination with a variety of
agents in various disease settings. The Registrant's goal is to expand the
applications of RMP-7 through its own development activities, and, when
appropriate, collaborations with pharmaceutical companies. First, Alkermes may
collaborate with companies having drugs whose uses could be expanded to include
central nervous system indications. In such cases, Alkermes and its partner
could collaborate in the clinical development of the combination without any
exchange of product rights. Second, Alkermes may collaborate with development
and marketing partners for RMP-7 in various business areas and geographic
territories. In such cases, Alkermes could license rights to RMP-7 to its
partner, subject to the rights of the Partnership. See "Collaborative
Arrangements -- Alkermes Clinical Partners, L.P."

         Brain Tumor. RMP-7 is being tested initially for the treatment of
recurrent malignant glioma, an aggressive form of brain tumor. Alkermes believes
that RMP-7 may have applicability to the treatment and diagnosis of other types
of brain tumors. In that regard, the Registrant initiated, in February 1996, a
Phase I/II clinical trial of RMP-7 in patients with metastatic brain tumor. The
Registrant, in collaboration with the National Cancer Institute ("NCI"), also
initiated a Phase I/II clinical trial in August 1996 in pediatric patients with
brain tumors.

         Brain tumors can be classified into two major groups: primary brain
tumors, which originate and recur in the brain, and metastatic brain tumors,
which are tumors that have spread to the brain from other parts of the body.
Each year in the United States and Europe a total of 40,000 patients are
diagnosed with primary brain tumors, of which approximately 60%-70% are
malignant glioma, and 150,000 patients are diagnosed with metastatic brain
tumors.

                                        7


<PAGE>   8


         Current treatment for brain tumors is limited and inadequate. Standard
treatment typically involves surgery to remove cancerous tissue, followed by
radiation therapy. After initial treatment with surgery and/or radiotherapy,
brain tumors often recur. Upon recurrence, tumors typically progress rapidly,
neurological function and quality of life deteriorate and patients die within
months. Chemotherapy has played only a limited role in treatment, in part due to
the limited access of many chemotherapeutic agents to the brain because of the
normally restrictive blood-brain barrier. Carboplatin is a chemotherapeutic
approved for use by the FDA and other regulatory authorities worldwide for use
in the treatment of various tumor types outside of the brain, but is limited in
its ability to penetrate into the brain. RMP-7 is designed to enable more
effective use of chemotherapeutic agents like carboplatin in the treatment of
brain tumors by transiently increasing the permeability of the blood-brain
barrier.

         Alkermes is pursuing two alternative treatment strategies for RMP-7 and
carboplatin in patients with malignant brain tumor: intravenous and
intra-arterial administration. By pursuing both treatment methods, the
Registrant believes it strengthens the scientific foundation of the clinical
trials program and increases the likelihood of observing a treatment effect in
patients.

         Recurrent Malignant Glioma Clinical Trials. The Registrant's clinical
strategy for RMP-7 has been to establish a foundation of safety and
pharmacologic effect of increasing blood-brain barrier permeability prior to
entering Phase II efficacy trials of RMP-7 administered in combination with
carboplatin. To date, over 600 human subjects have received RMP-7 in a series of
clinical trials in all indications studied. Through the Phase I and Phase I/II
clinical trials, RMP-7 was shown to have a good safety profile in volunteers and
patients. Transient flushing was the most consistent adverse event noted and
nausea and vomiting were determined to be the dose limiting toxicity. There was
no evidence of increased toxicity associated with the combination of RMP-7 and
carboplatin, and the drug combination was generally well tolerated by patients.

         Based on the successful completion of Phase I and Phase I/II clinical
trials, Alkermes initiated multiple Phase II clinical trials both of intravenous
and intra-arterial RMP-7 and carboplatin in patients with recurrent malignant
glioma. Three multi-center Phase II clinical trials of intravenous RMP-7 and
carboplatin and one multi-center Phase II clinical trial of intra-arterial RMP-7
and carboplatin were designed and initiated. The results of the three Phase II
intravenous RMP-7 clinical trials provides a strong rationale for the
Registrant's decision to proceed in the United States and Europe into Phase III
efficacy trials of intravenous RMP-7 and carboplatin in patients with brain
tumors.

         European Intravenous Phase II Clinical Trials: ALK01-013 and ALK01-019.
In Europe, two separate non-controlled, open label Phase II clinical trials of
intravenous RMP-7 and carboplatin in patients with recurrent malignant glioma
commenced in the first quarter of 1995. Patient enrollment was completed in May
1996, and preliminary results from the two clinical trials were announced in
December 1996.

         The two clinical trials enrolled differing patient populations.
ALK01-013 ("Study-013") enrolled patients whose brain tumors had recurred
following previous treatment with surgery and radiotherapy. Such patients had
not previously been treated with chemotherapy. ALK01-019

                                        8


<PAGE>   9
("Study-019") enrolled patients whose brain tumors had recurred following
previous treatment with surgery, radiotherapy and chemotherapy.

         In both clinical trials, patients received treatment cycles of RMP-7
and carboplatin approximately once every four weeks. Each cycle consisted of a
15-minute intravenous infusion of carboplatin and a concurrent 10-minute
intravenous infusion of RMP-7. The prospectively defined endpoints of the
clinical trials included response rates over the first four cycles of treatment
as determined by stabilization or improvement for a minimum of two cycles of
treatment as measured by three standardized tests of neurological impairment and
patient performance status and stabilization or reduction in tumor volume for a
minimum of two cycles as measured with contrast-enhanced MRI.

         In Study-013, 45 patients were treated at nine medical centers in the
United Kingdom. The combination of RMP-7 and carboplatin was generally well
tolerated. Of the patients treated, 61% to 91% responded to treatment as
measured by three tests of neurological impairment and performance status. In
addition, 79% of patients responded to the treatment as measured by the size of
their tumor as measured with contrast-enhanced MRI.

         An independent analysis conducted by a statistician from the Medical
Research Council ("MRC"), Cambridge, England, compared the effect on survival of
treatment with RMP-7 and carboplatin versus a group of historical control
patients matched on important prognostic factors. All comparisons favored the
group treated with RMP-7 and carboplatin versus the control group. This finding
was statistically significant (hazard ratio 1.9-2.2, p< = 0.02), after
accounting for the effects of prognostic factors.

         In Study-019, 42 patients were treated at 11 medical centers in the
United Kingdom, France and Sweden. Treatment with the combination of RMP-7 and
carboplatin was generally well tolerated. Of the patients treated, 40% to 59%
responded to treatment as measured by three tests of neurological impairment and
performance status. In addition, 24% of patients responded to the treatment as
measured by the size of their tumor with contrast-enhanced MRI. The MRC did not
perform a comparison of patients in Study-019 to historical controls due to the
lack of a database of comparable patients who had failed surgery, radiotherapy
and chemotherapy.

         There can be no assurance that the results of the European clinical
trials will be sufficient for the Registrant to obtain approval to market RMP-7
in Europe, or that the European regulatory bodies will not require additional
clinical trials. In addition, there can be no assurance that the results of a
Phase III trial will support the results of the European trials.

         United States Intravenous Phase II Clinical Trial: ALK01-017. In the
United States, a Phase II clinical trial of intravenous RMP-7 and carboplatin
commenced in March 1995 and was conducted at 10 medical centers. Enrollment of
121 patients was completed in May 1996 and preliminary results from the clinical
trial were announced in March 1997.

         The clinical trial was designed as a double-blind, placebo-controlled
study comparing treatment with intravenous RMP-7 and carboplatin to treatment
with carboplatin alone in patients with recurrent malignant glioma. Patients
received treatment cycles of RMP-7 and carboplatin once approximately every four
weeks. Each cycle consisted of an approximately 45-minute intravenous

                                        9


<PAGE>   10

infusion of carboplatin and a 10-minute intravenous infusion of RMP-7. The
prospectively defined endpoints included time to tumor progression as measured
by an increase of tumor volume measured with contrast-enhanced MRI of greater
than 50%, and three separate measurements of patients' functional capacity,
neurological impairment and quality of life.

         The study did not meet its primary endpoint of time to tumor
progression as measured by changes in tumor volume on MRI. The study was
designed to include multiple additional endpoints. Observed trends toward
increased survival time, six months survival rate and slowed progression of
functional impairment for patients receiving the combination of RMP-7 and
carboplatin compared to patients receiving treatment with carboplatin alone are
being analyzed.

         The results of the three Phase II clinical trials provide a strong
rationale for the Registrant's decision to proceed in the United States and
Europe into Phase III efficacy trials of intravenous RMP-7 and carboplatin in
patients with brain tumors.

         United States Intra-arterial Phase II Clinical Trial: ALK01-031.
Alkermes initiated a multi-center Phase II clinical trial in the United States
of intra-arterial RMP-7 and carboplatin in March 1996. Enrollment of 51 patients
was completed in September 1996 at nine medical centers. Preliminary results
from the study are expected during fiscal 1998.

         The clinical trial is designed as a non-controlled open label study of
the treatment with RMP-7 and carboplatin administered intra-arterially in
patients with recurrent malignant glioma. Patients receive treatment cycles of
RMP-7 and carboplatin once approximately every four weeks. Each cycle consists
of an approximately 45-minute intra-arterial infusion of carboplatin and a
10-minute intra-arterial infusion of RMP-7. The prospectively defined endpoints
include time to tumor progression as measured by an increase to tumor volume
measured with contrast-enhanced MRI of greater than 50%, and three separate
measurements of patients' functional capacity, neurological impairment and
quality of life.

         Metastatic Brain Tumor Clinical Trials. Alkermes initiated a
multi-center Phase I/II non-controlled, open label clinical trial in Europe of
intravenous RMP-7 and carboplatin in patients with metastatic brain tumor in
April 1996. The study is being conducted at two medical centers and is expected
to enroll approximately 50 patients.

         Alkermes also initiated a Phase I/II non-controlled, open label
clinical trial in the United States of intra-arterial RMP-7 and carboplatin in
patients with metastatic brain tumor in October 1995. The study is being
conducted at one medical center and is expected to enroll approximately 18
patients.

         Pediatric Brain Tumor Clinical Trial. In August 1996, Alkermes, in
collaboration with the NCI, initiated a non-controlled, open label Phase I/II
clinical trial of intravenous RMP-7 and carboplatin in pediatric brain tumor
patients who had failed other therapies. The study is being sponsored and
conducted by the Pediatric Branch of the NCI and is expected to enroll
approximately 24 patients.



                                       10


<PAGE>   11


MEDISORB

         Product Development Strategy. The Registrant's strategy is to generate
multiple product opportunities by applying Medisorb technology to the
development of superior formulations of small molecule pharmaceutical products.
The Registrant believes these formulations have the potential to expand the
utilization of these products and improve the competitive advantage of its
collaborators in major markets.

         The product development plan for individual Medisorb formulations is
expected to proceed in several stages. First, the Registrant, either on its own
or pursuant to a collaboration, conducts initial feasibility work to test
various Medisorb formulations for a particular drug in vitro and in vivo.
Following the successful completion of the feasibility stage, preclinical
development and manufacturing scale-up activities directed toward the initiation
of clinical trials of the Medisorb formulation would be conducted in
collaboration with a partner.

         Undisclosed Medisorb Product Candidate. Alkermes is developing and
manufacturing a Medisorb product candidate in collaboration with Janssen, a
subsidiary of Johnson & Johnson. In 1996, Janssen completed initial Phase I
clinical trials of the Medisorb product candidate. The collaboration is focused
on process scale-up and manufacturing in anticipation of late-stage clinical
trials and, if successful, product commercialization. Janssen is responsible for
conducting all clinical trials.

COLLABORATIVE ARRANGEMENTS

         The Registrant's business strategy includes forming collaborations to
provide technological, financial, marketing, manufacturing and other resources.
The Registrant has entered into several corporate collaborations.

         Genentech, Inc.

         In November 1996, Alkermes announced the completion of a Phase I
clinical trial of a ProLease hGH formulation in adults. Based in part on the
successful completion of the Phase I trial, Genentech exercised its option to
enter into a license agreement, and obtained from Alkermes a license coexclusive
in the United States and exclusive in the rest of the world for a ProLease
formulation of hGH. Under the terms of the agreement, Genentech could provide an
estimated $20.0 million in development funding for scale-up activities, clinical
trials materials, manufacturing and clinical trial expenses over the development
period. In addition, Alkermes could receive milestone payments of approximately
$10.0 million, if the ProLease hGH formulation is successfully developed and is
approved by regulatory authorities. Alkermes will be responsible for conducting
Phase I/II clinical trials and manufacturing the ProLease hGH formulation and is
to receive manufacturing revenues and royalties on sales. Alkermes also granted
Genentech an extension until November 1997 of its option to license ProLease for
another Genentech undisclosed protein.

         Genentech has the right to terminate the agreement for any reason upon
30 days' written notice or, if the Registrant has begun manufacturing the
ProLease product for commercial sale, upon six months' written notice. In
addition, either party may terminate the agreement upon the other

                                       11


<PAGE>   12

party's material default which is not cured within 90 days of written notice, or
upon the other party's insolvency or bankruptcy.

         To fund the Registrant's activities during the initial phase of the
collaboration, Genentech has loaned the Registrant the aggregate amount of $3.5
million pursuant to a Convertible Promissory Note dated January 31, 1995 (the
"Note"). The outstanding principal amount of the Note accrues interest at the
prime rate of interest as reported by the Bank of America NT & SA from time to
time. The outstanding principal amount of the Note and accrued but unpaid
interest thereon becomes due and payable on January 31, 2000.

         Under the terms of the Note, Alkermes has the option to convert, at any
time, all outstanding principal and accrued but unpaid interest thereon (as such
amount may exist from time to time, the "Conversion Amount") into shares of
Common Stock at the average closing price of the Common Stock for the 20 trading
days ending the day before the conversion date (the "Conversion Price"). In
addition, Genentech shall have the right to convert the Conversion Amount into
shares of Common Stock at the Conversion Price if at any time the total cash,
cash equivalents and marketable debt instruments of the Registrant shall be less
than the sum of (i) all indebtedness which ranks senior to the indebtedness
evidenced by the Note, and (ii) the Conversion Amount. Genentech also has the
right to demand that the Common Stock be registered under certain circumstances.

         Schering-Plough Corporation

         Under an amended development and license agreement with
Schering-Plough, the Registrant has agreed to develop an injectable delivery
system which incorporates Intron A as an active ingredient utilizing the
Registrant's ProLease delivery system and has granted to Schering-Plough an
exclusive worldwide royalty bearing license to manufacture, use and sell any
such system that may be developed pursuant to the amended agreement. Under the
amended agreement, Schering-Plough will also be responsible for conducting
clinical trials and securing regulatory approvals. The amended agreement
provides for development funding to the Registrant and provides for certain
payments to be made by Schering-Plough to the Registrant for its achievement of
certain milestones. The Registrant and Schering-Plough entered into a prepaid
royalty agreement pursuant to which Schering-Plough has prepaid certain
royalties. Payments to the Registrant were approximately $7.0 million through
March 31, 1997, and future milestone payments could exceed an additional $5.0
million, not including royalties.

         Schering-Plough has the right to terminate the amended agreement upon
60 days' written notice upon the occurrence of certain events, including if the
Registrant fails to meet product specifications or an agreed upon delivery
schedule, the results of a safety and pharmacokinetics study provide
Schering-Plough with reasonable justification not to proceed to a Phase II
clinical trial, the use of the product results in adverse effects that justify
termination of clinical trials, Schering-Plough is unable to manufacture the
product on a commercial scale, or upon completion or permanent discontinuation
of the clinical trials. Either party may terminate the amended agreement upon
the insolvency or bankruptcy of the other party or upon a breach by the other
party which has not been cured after 60 days' notice. Schering-Plough also has
the right to terminate the amended agreement upon 90 days' written notice or
continue the development project on its own in the event Alkermes fails by an
agreed upon date to deliver batches of a ProLease formulation of Intron A that
meet

                                       12


<PAGE>   13

agreed upon specifications. In the event Schering-Plough elects to continue the
development project after termination, it will remain obligated to pay Alkermes
milestone payments and royalties upon commercial sale. In the event
Schering-Plough terminates the amended agreement for any reason, Alkermes must
repay the prepaid royalties received from Schering-Plough with interest. Such
repayment obligation would be evidenced by an interest-bearing note and would be
payable in full on the third anniversary of the date of the note. Alkermes will
have the right, subject to the satisfaction of certain conditions, to satisfy
its repayment obligation through the issuance of shares of its Common Stock. The
number of shares that may be issued would be based upon the average closing
price of Alkermes Common Stock on the Nasdaq National Market for the 30 business
days immediately preceding the date on which the shares are delivered. Any
Common Stock issued to Schering-Plough must be freely resalable.

         Johnson & Johnson

         In November 1996, the Registrant entered into a development and license
agreement with Ortho Pharmaceutical Corporation, an affiliate of Johnson &
Johnson, for the development of a ProLease formulation of a Johnson & Johnson
proprietary compound (the "J&J Product Candidate"). The Registrant is developing
a sustained release formulation of this compound to treat hormone-mediated
disorders.

         Pursuant to the development agreement, Johnson & Johnson obtained an
exclusive, worldwide, royalty bearing license to make, use and sell products
resulting from such agreement. In exchange, Johnson & Johnson is to provide the
Registrant with research and development funding, milestone payments and royalty
payments based on sales, if any, of the J&J Product Candidate. Development
funding and milestone payments could aggregate approximately $20 million,
assuming the development of the J&J Product Candidate proceeds in accordance
with its development plan. Johnson & Johnson is to be responsible for conducting
clinical trials and securing regulatory approvals and, together with its
affiliates, is to be responsible for the marketing of any products that result
from the collaboration. The Registrant expects to manufacture any such products
for commercial sales.

         Johnson & Johnson may terminate the development agreement for any
reason, upon 90 days' written notice if such termination notice occurs prior to
filing a New Drug Application ("NDA") with the FDA, or upon six months' written
notice if such notice occurs subsequent to such a filing. In addition, either
party may terminate the development agreement and the related manufacturing
agreement upon a material default or breach by the other party of such agreement
which is not cured within 60 days' notice, or upon the other party's insolvency
or bankruptcy.

         Janssen Pharmaceutica International

         Pursuant to a development agreement, the Registrant is collaborating
with Janssen in the development of sustained release formulations, utilizing the
Medisorb technology, of an undisclosed Janssen product candidate. Under the
development agreement, the Registrant is responsible for production of the
Janssen product candidate for clinical trials. Janssen is responsible for
conducting clinical trials of the Janssen product candidate and securing all
necessary regulatory approvals.


                                       13


<PAGE>   14

         In October 1996, the Registrant announced the expansion of the
development agreement. Janssen has agreed to provide development funding of
approximately $20 million over a two year period, assuming the product continues
in clinical development. The funding will be used for manufacturing clinical
trials material and scale-up for commercial sale.

         Under related license agreements, Janssen and an affiliate have
exclusive world-wide licenses from the Registrant to manufacture, use and sell
the Janssen product candidate. If Janssen decides to employ third-party
suppliers of the commercialized Janssen product developed under the development
agreement, the Registrant has a right of first refusal for the manufacture and
supply of such product, and component bio-absorbable polymers thereof. Under the
license agreements, Janssen is required to pay Alkermes certain royalties with
respect to all Medisorb formulations of the Janssen product sold to customers.
Janssen can terminate the development agreement or the license agreement upon 30
days' prior written notice.

         Alkermes Clinical Partners, L.P.

         In April 1992, Units consisting of limited partnership interests in the
Partnership and warrants to purchase the Registrant's Common Stock were sold to
investors in a private placement (the "Private Placement"). The proceeds of the
$46 million Private Placement have been used to fund the further development and
clinical testing of RMPs for human pharmaceutical use in the United States,
Canada and Europe. Such funding was not sufficient to complete clinical trials
and seek regulatory approval of RMP-7. Since the completion of funding from the
Partnership, which ended during the quarter ended June 30, 1996, Alkermes has
used, and intends to continue to use, its own resources to develop RMP-7, but
may be forced to seek alternative sources of funding, including additional
collaborators.

         Pursuant to a product development agreement, dated March 6, 1992,
Alkermes transferred substantially all of its rights to the RMP technology to
the Partnership. Alkermes has an option to purchase all of the limited
partnership interests in the Partnership (the "Purchase Option") and thereby
reacquire the transferred technology. The Registrant is required to fund the
development of RMP-7 to maintain its Purchase Option.

         The Partnership may terminate the research program for any or all
products upon the affirmative vote of 75% of the directors of the general
partner of the Partnership, Alkermes Development Corporation II ("ADC II"), a
wholly owned subsidiary of Alkermes, that such research is not feasible or is
uneconomic. The Partnership may terminate the marketing program for any or all
products upon the affirmative vote of 75% of the directors of ADC II based on
the directors' good faith business judgment. The Partnership may also terminate
the research or marketing program if Alkermes has materially breached the
agreement and not cured such breach within 30 days' written notice. Both parties
may terminate the research or marketing program upon mutual consent to terminate
or upon the insolvency or bankruptcy of the other party.

         The Partnership has granted Alkermes an exclusive interim license to
manufacture and market RMPs for human pharmaceutical use in the United States
and Canada. Upon the first marketing approval of an RMP product by the FDA,
Alkermes is obligated to make a payment to the Partnership equal to 20% of the
aggregate capital contributions of all limited partners. Additionally,

                                       14


<PAGE>   15

Alkermes will pay royalty payments equal to 12% of United States and Canadian
revenues and, in certain circumstances, 10% of European revenues from any sales
of RMPs by Alkermes. The interim license will terminate if Alkermes does not
exercise the Purchase Option. Alkermes can exercise the Purchase Option by
making a payment to the partnership equal to 80% of the aggregate capital
contributions of all limited partners in addition to royalty payments in the
same percentages as provided for under the interim license agreement.

         The general partner of the Partnership is ADC II. Fifty percent of the
members of the board of directors of ADC II are persons not affiliated with
Alkermes. Such non-affiliated persons were nominated by the sales agent for the
Private Placement. The sales agent will continue to have the right to nominate
at least half of the members of ADC II's board of directors until ADC II or some
other affiliate of Alkermes ceases to be the general partner of the Partnership,
the Partnership terminates in accordance with the terms of the Limited
Partnership Agreement or the sales agent's venture capital investment
partnership ceases to be a limited partner of the Partnership.

         ALZA Corporation

         In February 1997, the Registrant agreed to collaborate with ALZA
Corporation on the development of a to-be-determined product candidate, based on
either the Medisorb or ProLease drug delivery system. The economic terms of such
a collaboration are to be negotiated.

MANUFACTURING

         Each of the Registrant's three drug delivery systems utilizes a
distinct manufacturing process.

         ProLease

         ProLease manufacturing involves microencapsulation of drug substances
provided to Alkermes by its collaborators in small polymeric microspheres using
extremely cold processing conditions suitable for fragile molecules. The
ProLease manufacturing process consists of two basic steps. First, the drug is
formulated with stabilizing agents and dried to create a fine powder. Second,
the powder is microencapsulated at very low temperatures.

         Alkermes has completed construction of an in-house pilot production
facility that has been validated by the Registrant for manufacturing in
accordance with Good Manufacturing Practices ("GMP"). The facility is being used
to manufacture product candidates incorporating its ProLease sustained-release
delivery system for use in clinical trials. This facility is not capable of
manufacturing products on a commercial scale. Pursuant to agreements with
certain of its collaborators, Alkermes has the right to manufacture ProLease
products for commercial sale. Alkermes expects to begin construction of a new
commercial scale ProLease manufacturing facility of approximately 30,000 square
feet during fiscal 1998.

         RMP-7

         RMP-7 is a small peptide manufactured using standard synthetic
techniques. Alkermes relies on an independent European pharmaceutical company
for the manufacture and supply of RMP-7.

                                       15


<PAGE>   16

Scale-up of RMP-7 manufacturing process to support international clinical trials
and commercial launch has been completed. Alkermes believes that, if necessary,
there are other companies which could manufacture and supply its requirements
for RMP-7.

         Medisorb

         The Medisorb manufacturing process is significantly different from the
ProLease process and is based on a method of encapsulating small molecule drugs,
provided by the Registrant's collaborator, in polymers using a large-scale
emulsification. The Medisorb manufacturing process consists of three basic
steps. First, the drug is combined with a polymer solution. Second, the
drug/polymer solution is mixed in water to form liquid microspheres (an
emulsion). Third, the liquid microspheres are dried to produce finished product.

         Alkermes owns a 14,000 square foot GMP sterile manufacturing facility
in Wilmington, Ohio. Alkermes is manufacturing a product candidate incorporating
its Medisorb sustained-release delivery system for use by Janssen in clinical
trials at this facility. It does not manufacture such product candidates on a
commercial scale. During fiscal 1998, Alkermes intends to expand its current
manufacturing facility by an additional 20,000 square feet, so that it can
manufacture Medisorb product candidates on a commercial scale.


         The manufacture of the Registrant's products for clinical trials and
commercial purposes is subject to current GMP and other federal regulations. The
Registrant has never operated an FDA-approved manufacturing facility, and there
can be no assurance that it will obtain necessary approvals for commercial
manufacturing.

         If Alkermes is not able to develop manufacturing capacity and
experience or to continue to contract for manufacturing capabilities on
acceptable terms, its ability to conduct preclinical testing and clinical trials
will be compromised, and delays in obtaining regulatory approvals might result,
as well as commercial sales if approvals are obtained. Such delays could
materially adversely affect the Registrant's competitive position and its
business, financial condition and results of operations.

MARKETING

         Alkermes plans to market and sell RMP-7, if successfully developed and
approved, either directly or through co-promotion or other licensing
arrangements with third parties. Such arrangements may be exclusive or
nonexclusive and may provide for marketing rights worldwide or in a specific
market.

         Alkermes intends to market any ProLease and Medisorb products through
its corporate partners. Alkermes has entered into development agreements,
including sales and marketing, for ProLease product candidates with Genentech,
Schering-Plough and Johnson & Johnson, and for a Medisorb product candidate with
Janssen. See "Collaborative Arrangements."

         Alkermes currently has no experience in marketing or selling
pharmaceutical products. In order to achieve commercial success for any product
candidate approved by the FDA, Alkermes must

                                       16


<PAGE>   17

either develop a marketing and sales force or enter into arrangements with third
parties to market and sell its products. There can be no assurance that Alkermes
will successfully develop such experience or that it will be able to enter into
marketing and sales agreements with others on acceptable terms, if at all. If
the Registrant develops its own marketing and sales capability, it will compete
with other companies that currently have experienced and well funded marketing
and sales operations. To the extent the Registrant enters into co-promotion or
other sales and marketing arrangements with other companies, any revenues
received by the Registrant will be dependent on the efforts of others, and there
can be no assurance that such efforts will be successful.

COMPETITION

         The biotechnology and pharmaceutical industries are subject to rapid
and substantial technological change. Alkermes faces, and will continue to face,
intense competition in the development, manufacturing, marketing and
commercialization of its product candidates from academic institutions,
government agencies, research institutions, biotechnology and pharmaceutical
companies, including its collaborators, and drug delivery companies. There can
be no assurance that developments by others will not render the Registrant's
product candidates or technologies obsolete or noncompetitive, or that the
Registrant's collaborators will not choose to use competing drug delivery
methods. At the present time, Alkermes has no sales force or marketing or
commercial manufacturing experience. In addition, many of the Registrant's
competitors and potential competitors have substantially greater capital
resources, manufacturing and marketing experience, research and development
resources and production facilities than does Alkermes. Many of these
competitors also have significantly greater experience than Alkermes in
undertaking preclinical testing and clinical trials of new pharmaceutical
products and obtaining FDA and other regulatory approvals.

         With respect to RMP-7, the Registrant believes that there are currently
no products approved by the FDA for increasing the permeability of the
blood-brain barrier. There are, however, many novel experimental therapies for
the treatment of brain tumor and central nervous system infections being tested
in the United States and Europe.

         With respect to ProLease and Medisorb, the Registrant is aware that
there are other companies developing sustained-release delivery systems for
pharmaceutical products. In addition, other companies are developing new
chemical entities which, if developed successfully, could compete against
sustained-release formulations of products of the Registrant's collaborators.
These chemical entities are being designed to have different mechanisms of
action or improved safety and efficacy. In addition, the Registrant's
collaborators may develop, either alone or with others, products that compete
with the development and marketing of the Registrant's product candidates.

         There can be no assurance that the Registrant will be able to compete
successfully with such companies. The existence of products developed by the
Registrant's competitors, or other products or treatments of which the
Registrant is not aware, or products or treatments that may be developed in the
future, may adversely affect the marketability of products developed by the
Registrant.



                                       17


<PAGE>   18

PATENTS AND PROPRIETARY RIGHTS

         The Registrant's success will be dependent, in part, on its ability to
obtain patent protection for its product candidates and those of its
collaborators, maintaining trade secret protection and operating without
infringing upon the proprietary rights of others.

         The Registrant has a proprietary portfolio of patent rights and
exclusive licenses to patents and patent applications. The Registrant has filed
numerous United States and international patent applications directed to
composition of matter as well as processes of preparation and methods of use,
including applications relating to: permeabilizers, certain rights to which have
been licensed to the Partnership, of which one United States patent was issued
in each of May 1992, December 1993, April 1996 and December 1996; carriers for
enabling passage into the brain of therapeutic compounds, of which one United
States patent was issued in each of October 1992, January 1993 and June 1996; a
ProLease microencapsulation process, of which one United States patent was
issued in May 1991; the formulation of ProLease composition of which one United
States patent was issued in May 1995; a Medisorb microencapsulation process of
which one United States patent was issued in June 1983; and 11 additional United
States patents related to Medisorb methods and compositions that were issued
between July 1985 and June 1995. In the future, the Registrant plans to file
further United States and foreign patent applications directed to new or
improved products and processes. The United States patents issued to the
Registrant will expire between 2000 and 2014. Alkermes intends to file
additional patent applications when appropriate and intends to defend its patent
position aggressively.

         Alkermes has exclusive rights through licensing agreements with several
institutions to nine issued United States patents, a number of United States
patent applications and to corresponding foreign patents and patent applications
in many countries, subject in certain instances to the rights of the United
States government to use the technology covered by such patents and patent
applications. The United States patents that have been licensed to the
Registrant will expire between the years 2003 and 2013. Under certain licensing
agreements, the Registrant currently pays annual license fees and/or minimum
annual royalties. During the fiscal year ended March 31, 1997, such fees were
approximately $92,000. In addition, under all licensing agreements, Alkermes is
obligated to pay royalties on future sales of products, if any, covered by the
licensed patents.

         The Registrant is aware of several United States patents issued to
third parties containing claims which could be construed to cover some of the
Registrant's product candidates utilizing its ProLease, RMP-7, and Medisorb
delivery systems. In one case, the Registrant has received a letter from the
owner of a patent asking the Registrant to compare the Registrant's Medisorb
technology disclosed in a published international patent application with such
owner's patented technology. There can be no assurance that the claims of the
issued United States patents are not infringed by the proposed manufacture, use,
offer for sale, or sale of these products by the Registrant or its
collaborators. There can be no assurance that a third party will not file an
infringement action, or that the Registrant would prevail in any such action.
There can be no assurance that the cost of defending an infringement action
would not be substantial, and would not have a material adverse effect on the
Registrant's business, financial condition and results of operations. The
Registrant is also aware of patent applications filed by third parties in the
United States and in various foreign countries which may cover some of the
Registrant's product candidates utilizing its ProLease, RMP-7

                                       18


<PAGE>   19

or Medisorb delivery systems. Patents may issue from these applications which
could preclude the Registrant from manufacturing, using, offering for sale, or
selling some of its ProLease, RMP-7 or Medisorb product candidates. Furthermore,
there can be no assurance that any licenses under such patents would be made
available on commercially viable terms, if at all. Failure to obtain any
required license could prevent the Registrant from commercializing one or more
of its products.

         The patent positions of pharmaceutical, biopharmaceutical and
biotechnology firms, including Alkermes, are generally uncertain and involve
complex legal and factual questions. In addition, there can be no assurance that
the Registrant's or its licensors' current patent applications will be allowed
or that the claims of any patents issued to Alkermes or its licensors (in
connection with either or both the Registrant's product candidates or the
Partnership's product candidate) will be sufficiently broad to protect the
Registrant's or the Partnership's technology or to provide Alkermes or the
Partnership with any competitive advantages. Moreover, no assurance can be given
that patents issued to Alkermes (in connection with either or both the
Registrant's product candidates or the Partnership's product candidate), or its
respective licensors, if any, will not be contested, invalidated or
circumvented. In addition, if Alkermes or the Partnership is required to bring
or defend against a narrowed charge of patent infringement or to protect its own
proprietary rights against third parties, substantial costs could be incurred.

         In the future, Alkermes may be required to obtain additional licenses
to patents or other proprietary rights of third parties. There can be no
assurance that any such licenses will be available on acceptable terms, if at
all, and failure to obtain such licenses could result in delays in marketing the
Registrant's products or the inability to proceed with the development,
manufacture or sale of product candidates requiring such licenses.

         The Registrant also relies upon unpatented trade secrets and
improvements, unpatented know-how and continuing technological innovation to
develop and maintain its competitive position which it seeks to protect, in
part, by confidentiality agreements with its corporate partners, collaborators,
employees and consultants. There can be no assurance that these agreements will
not be breached, that the Registrant would have adequate remedies for any
breach, or that the Registrant's trade secrets will not otherwise become known
or be independently discovered by competitors.

         The Registrant's practice is to require its employees, consultants and
advisors to execute a confidentiality agreement upon the commencement of an
employment or consulting relationship with the Registrant. The agreements
provide that all confidential information developed or made known to an
individual during the course of the employment or consulting relationship shall
be kept confidential and not disclosed to third parties except in specified
circumstances. In the case of employees, the agreements provide that all
inventions conceived by the individual while employed by the Registrant shall be
the exclusive property of the Registrant. There can be no assurance, however,
that these agreements will provide meaningful protection for the Registrant's
trade secrets in the event of unauthorized use or disclosure of such
information.

GOVERNMENT REGULATION

         The manufacture and marketing of pharmaceutical products in the United
States require the approval of the FDA under the Federal Food, Drug and Cosmetic
Act. Similar approvals by

                                       19


<PAGE>   20

comparable agencies are required in most foreign countries. The FDA has
established mandatory procedures and safety standards which apply to the
preclinical testing and clinical trials, manufacture and marketing of
pharmaceutical products. Pharmaceutical manufacturing facilities are also
regulated by state, local and other authorities.

         As an initial step in the FDA regulatory approval process, preclinical
studies are typically conducted in animal models to assess the drug's efficacy
and to identify potential safety problems. The results of these studies must be
submitted to the FDA as part of an Investigational New Drug application ("IND"),
which must be reviewed by the FDA before proposed clinical testing can begin.
Typically, clinical testing involves a three-phase process. Phase I trials are
conducted with a small number of subjects and are designed to provide
information about both product safety and the expected dose of the drug. Phase
II trials are designed to provide additional information on dosing and
preliminary evidence of product efficacy. Phase III trials are large scale
studies designed to provide statistical evidence of efficacy and safety in
humans. The results of the preclinical testing and clinical trials of a
pharmaceutical product are then submitted to the FDA in the form of a New Drug
Application ("NDA"), or for a biological product in the form of a Product
License Application ("PLA"), for approval to commence commercial sales.
Preparing such applications involves considerable data collection, verification,
analysis and expense. In responding to an NDA or PLA, the FDA may grant
marketing approval, request additional information or deny the application if it
determines that the application does not satisfy its regulatory approval
criteria.

         Prior to marketing, any product developed by Alkermes or its
collaborators must undergo an extensive regulatory approval process, which
includes preclinical testing and clinical trials of such product candidate to
demonstrate safety and efficacy. This regulatory process can require many years
and the expenditure of substantial resources. Data obtained from preclinical
testing and clinical trials are subject to varying interpretations, which can
delay, limit or prevent FDA approval. In addition, changes in FDA approval
policies or requirements may occur or new regulations may be promulgated which
may result in delay or failure to receive FDA approval. Similar delays or
failures may be encountered in foreign countries. Delays and costs in obtaining
regulatory approvals would have a material adverse effect on the Registrant's
business, financial condition and results of operations.

         Among the conditions for NDA or PLA approval is the requirement that
the prospective manufacturer's quality control and manufacturing procedures
conform on an ongoing basis with GMP. Before approval of an NDA or PLA, the FDA
will perform a prelicensing inspection of the facility to determine its
compliance with GMP and other rules and regulations. In complying with GMP,
manufacturers must continue to expend time, money and effort in the area of
production and quality control to ensure full technical compliance. After the
establishment is licensed, it is subject to periodic inspections by the FDA.

         The requirements which the Registrant must satisfy to obtain regulatory
approval by governmental agencies in other countries prior to commercialization
of its products in such countries can be as rigorous and costly as those
described above.

         The Registrant is also subject to various laws and regulations relating
to safe working conditions, laboratory and manufacturing practices, the
experimental use of animals and the use and disposal of hazardous or potentially
hazardous substances, including radioactive compounds and

                                       20


<PAGE>   21

infectious disease agents, used in connection with the Registrant's research.
Compliance with laws and regulations relating to the protection of the
environment has not had a material effect on capital expenditures, earnings or
the competitive position of the Registrant. However, the extent of government
regulation which might result from any legislative or administrative action
cannot be accurately predicted.

EMPLOYEES

         As of June 6, 1997, the Registrant had 177 full-time employees. A
significant number of the Registrant's management and professional employees
have had prior experience with pharmaceutical, biotechnology or medical product
companies. Alkermes believes that it has been highly successful in attracting
skilled and experienced scientific personnel; however, competition for such
personnel is intense. None of the Registrant's employees is covered by a
collective bargaining agreement.

ITEM 2.  PROPERTIES

         The Registrant leases and occupies approximately 97,000 square feet of
laboratory and office space in Cambridge, Massachusetts under five leases
expiring in the years 1998 to 2008. The leases contain provisions permitting the
Registrant to extend the term of such leases for up to ten years. The Registrant
has completed construction of a GMP pilot suite at its Massachusetts facility.
Such suite is for the manufacture of product candidates incorporating the
ProLease delivery system for preclinical and clinical trials. The Registrant
also expects to begin construction of a new commercial scale ProLease
manufacturing facility in Cambridge, Massachusetts during fiscal 1998. The
Registrant believes that its Massachusetts facilities are adequate for its
preclinical and clinical operations. The Registrant does not manufacture and
does not expect to manufacture RMPs for clinical trials. The Registrant has
engaged a third party to manufacture preclinical, clinical and commercial
supplies of RMPs.

         Alkermes Europe, Ltd., a wholly owned subsidiary of the Registrant,
leases and occupies approximately 4,600 square feet of office space in
Cambridge, England under a lease expiring in the year 2002. The Registrant
believes that such office space is adequate for the operations of Alkermes
Europe, Ltd.

         The Registrant owns and occupies approximately 14,000 square feet of
manufacturing, office and laboratory space in Wilmington, Ohio. The facility
contains a state-of-the-art GMP sterile production facility specifically
designed for the production of Medisorb microspheres. The Registrant also
expects to begin an expansion of its Medisorb manufacturing facility during
fiscal 1998. The Registrant believes that its Wilmington facility is adequate
for its preclinical and clinical operations.

         The Registrant also leases and occupies approximately 25,000 square
feet of laboratory and office space in Blue Ash, Ohio under a lease expiring in
1998. The Registrant believes that the Blue Ash facility is adequate for its
operations.

ITEM 3.  LEGAL PROCEEDINGS

         Not applicable.

                                       21


<PAGE>   22


ITEM 4.  SUBMISSION OF MATTERS TO A VOTE OF SECURITY HOLDERS

         Not applicable.


                      EXECUTIVE OFFICERS OF THE REGISTRANT

         The executive officers of the Registrant, who are elected to serve at
the pleasure of the Board of Directors, are as follows:

<TABLE>
<CAPTION>
         Name                       Age                       Position
         ----                       ---                       --------
<S>                                  <C>              <C>
Richard F. Pops                      35               Chief Executive Officer and Director

Robert A. Breyer                     53               President, Chief Operating Officer and Director

Raymond Bartus                       50               Senior Vice President, Preclinical Research and
                                                      Development

Michael J. Landine                   43               Senior Vice President, Chief Financial Officer and
                                                      Treasurer

Don G. Burstyn                       42               Vice President, Regulatory Affairs

J. Duncan Higgons                    42               Vice President, Business Development

Dennis M. Meka                       44               Vice President, Operations

Scott D. Putney                      43               Vice President, Protein and Molecular Biology

Cornelis H. Wortel                   41               Vice President, Medical Affairs

James L. Wright                      49               Vice President, Pharmaceutical Development
</TABLE>


                  Mr. Pops has been Chief Executive Officer and a Director of
the Registrant since February 1991. From February 1991 to June 1994, Mr. Pops
was also President of the Registrant. Mr. Pops currently serves on the Board of
Directors of Immulogic Pharmaceutical Corporation, the Biotechnology Industry
Organization (BIO) and The Brain Tumor Society (a non-profit organization).

                  Mr. Breyer has been President and Chief Operating Officer and
a Director of the Registrant since July 1994. From August 1991 to December 1993,
Mr. Breyer was President and General Manager of Eli Lilly Italy, a subsidiary of
Eli Lilly & Co. From September 1987 to August 1991, he was Senior Vice
President, Marketing and Sales of IVAC Corporation, a medical device company and
a subsidiary of Eli Lilly & Co.


                                       22


<PAGE>   23

                  Dr. Bartus has been Senior Vice President, Preclinical
Research and Development since November 1996. From November 1992 to November
1996, Dr. Bartus served as Senior Vice President, Neurobiology of the
Registrant. From June 1988 to November 1992, Dr. Bartus held various positions
with Cortex Pharmaceutical, Inc., most recently as Executive Vice President and
Chief Operating Officer. He holds an M.S. in Experimental Psychology and a Ph.D.
in Physiological Psychology from North Carolina State University.

                  Mr. Landine has been the Chief Financial Officer of the
Registrant since March 1988. From March 1988 to December 1994, he also served as
a Vice President, and since December 1994 as a Senior Vice President. He has
also been Treasurer of the Registrant since April 1991. He is currently an
advisor to Walker Magnetics Group, an international manufacturer of industrial
equipment. Mr. Landine is a certified public accountant.

                  Dr. Burstyn became Vice President, Regulatory Affairs in
December 1993. From 1987 to 1993, Dr. Burstyn was employed in various capacities
at Biogen, Inc., most recently as Director, Development Operations. Dr. Burstyn
received his B.S., M.S. and Ph.D. from the University of Maryland.

                  Mr. Higgons became Vice President, Business Development in
December 1994. From 1986 to 1994, he was employed in various capacities at IVAC
Corporation, most recently as Senior Director of Sales, Western Area.

                  Mr. Meka became Vice President, Operations of the Registrant
in January 1997. From 1994 to December 1996 he was employed by Dupont Merck
Pharmaceuticals as Vice President, Manufacturing and Corporate Services. From
1991 to 1994 he was employed by Dupont Merck Pharma (Puerto Rico) as President
and General Manager.

                  Dr. Putney has been Vice President, Protein and Molecular
Biology since November 1996 after having served as Vice President, Molecular
Biology since October 1991. From 1985 to October 1991, Dr. Putney served as
Director of Molecular Biology at Repligen Corporation, a biotechnology company,
and from 1988 to October 1991, Dr. Putney was also a Vice President at Repligen
Corporation. Dr. Putney received a B.S. in Biology and a B.A. in Chemistry from
the University of California, Irvine and a Ph.D. in Chemistry from the
Massachusetts Institute of Technology.

                  Dr. Wortel became Vice President, Medical Affairs in July
1996. From 1995 to 1996, he was employed by Procept, Inc., from 1993 to 1995, he
was employed by Repligen, Inc. and from 1991 to 1993, he was employed by
Centocor, Inc.

                  Dr. Wright became Vice President, Pharmaceutical Development
in December 1994. From 1989 to 1994, he was employed at Boehringer Ingelheim
Pharmaceutical, Inc., most recently as a Director. Dr. Wright received a B.A. in
Chemistry and Biology from the University of California, Santa Barbara, and an
M.S. in Pharmacy and a Ph.D. in Pharmacy from the University of Wisconsin.



                                       23


<PAGE>   24
                                     PART II


ITEM 5.  MARKET FOR REGISTRANT'S COMMON STOCK AND RELATED
         STOCKHOLDER MATTERS

             The Registrant's common stock is traded on the Nasdaq National
Market under the symbol ALKS. Set forth below for the indicated periods are the
high and low sale prices for Alkermes' common stock.

<TABLE>
<CAPTION>
                                              Fiscal 1997                   Fiscal 1996
                                              -----------                   -----------
                                             High      Low                High         Low
                                             ----      ---                ----         ---

            <S>                            <C>        <C>            <C>           <C>   
             1st Quarter                    $17        $ 8 1/2         $ 4 1/2       $2 5/8
             2nd Quarter                     16 1/8      8 1/2           9 1/4        3 5/8
             3rd Quarter                     25 1/2     11 7/8           8 5/8        5 3/4
             4th Quarter                     29 5/8     13 1/4          11 1/4        7 1/8
</TABLE>

             The number of shareholders of record on June 6, 1997 was 591. No
dividends have been paid on the common stock to date, and the Registrant does
not expect to pay cash dividends in the foreseeable future.


                                       24


<PAGE>   25
ITEM 6.    SELECTED FINANCIAL DATA

Alkermes, Inc. and Subsidiaries
(In thousands, except per share data)

<TABLE>
<CAPTION>
                                                                               Year Ended March 31,
                                                          ----------------------------------------------------------------------
                                                           1997          1996          1995          1994          1993
- --------------------------------------------------------------------------------------------------------------------------------
<S>                                                       <C>           <C>           <C>           <C>           <C>     
CONSOLIDATED STATEMENT OF OPERATIONS DATA:

Total revenues                                            $ 19,827      $ 15,919      $ 13,903      $  9,460      $ 11,806
                                                          ----------------------------------------------------------------------

Research and development expenses                           29,554        21,586        18,955        20,480        16,709
                                                          ----------------------------------------------------------------------

Total expenses                                              38,625        29,666        25,807        26,736        51,953 (1)
                                                          ----------------------------------------------------------------------

Net loss                                                  $(18,798)     $(13,747)     $(11,904)     $(17,275)     $(40,147)(1)
                                                          ----------------------------------------------------------------------

Net loss per weighted average number of common shares     $  (1.03)     $  (0.93)     $  (0.88)     $  (1.29)     $  (3.77)(1)
                                                          ----------------------------------------------------------------------

Weighted average number of common shares outstanding        18,288        14,775        13,535        13,362        10,653
                                                          ----------------------------------------------------------------------
</TABLE>



<TABLE>
<CAPTION>
                                                                                         March 31,
                                                           --------------------------------------------------------------------
                                                             1997           1996           1995           1994           1993
- -------------------------------------------------------------------------------------------------------------------------------
<S>                                                        <C>            <C>            <C>            <C>            <C>     
CONSOLIDATED BALANCE SHEET DATA:

Cash and cash equivalents and short-term investments       $ 85,297       $ 32,374       $ 21,351       $ 27,948       $ 32,859
                                                           --------------------------------------------------------------------

Total assets                                                104,697         45,752         36,708         46,322         54,025
                                                           --------------------------------------------------------------------

Long-term obligations                                        10,914          9,876          8,376          6,598          2,149
                                                           --------------------------------------------------------------------

Shareholders' equity                                         79,151         23,513         21,163         31,874         47,731
                                                           --------------------------------------------------------------------
</TABLE>

(1)      Includes a one time non-cash charge of $31.3 million for the purchase
         of in-process research and development as a result of the Company's
         acquisition of Enzytech, Inc.

                                       25
<PAGE>   26
ITEM 7. MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS
OF OPERATIONS

Alkermes, Inc. and Subsidiaries


INTRODUCTION

         Alkermes develops innovative pharmaceutical products based on three
proprietary drug delivery systems: ProLease(R), RMP-7(TM) and Medisorb(R). Since
its inception in 1987, the Company has devoted substantially all of its
resources to its research and development programs. Alkermes has not received
any revenue from the sales of products. The Company has been unprofitable since
inception and expects to incur substantial additional operating losses over the
next several years. At March 31, 1997, the Company had an accumulated deficit of
$119.8 million.

         The Company has funded its operations primarily through public
offerings and private placements of equity securities, bank loans and payments
under research and development agreements with collaborators, including Alkermes
Clinical Partners, L.P. ("Clinical Partners"), a research and development
limited partnership whose operations commenced in April 1992. The Company
intends to develop its product candidates in collaboration with others on whom
the Company will rely for funding, development, manufacturing and/or marketing.

FORWARD-LOOKING STATEMENTS

         Any statements set forth below or otherwise made in writing or orally
by the Company with regard to its expectations as to financial results and other
aspects of its business may constitute forward-looking statements within the
meaning of the Private Securities Litigation Reform Act of 1995. Although the
Company makes such statements based on assumptions which it believes to be
reasonable, the Company's business is subject to significant risks and there can
be no assurance that actual results will not differ materially from the
Company's expectations. Accordingly, the Company hereby identifies the following
important factors, among others, which could cause its results to differ from
any results which might be projected, forecasted or estimated by the Company in
any such forward-looking statements: (i) the Company and its collaborators could
not be permitted by regulatory authorities to undertake additional clinical
trials for ProLease, RMP-7, or Medisorb product candidates; (ii) product
candidates could be ineffective or unsafe during clinical trials; (iii) the
Company could incur difficulties or set-backs in obtaining the substantial
additional funding required to continue research and development programs and
clinical trials; (iv) even if product candidates appear promising at an early
stage of development, product candidates could fail to receive necessary
regulatory approvals, be difficult to manufacture on a large scale, be
uneconomical, fail to achieve market acceptance, be precluded from
commercialization by proprietary rights of third parties or experience
substantial competition in the marketplace; (v) technological change in the
biotechnology or pharmaceutical industries could render the Company's product
candidates obsolete or noncompetitive; (vi) disputes with collaborators,
termination of collaborations or failure to negotiate acceptable new
collaborative arrangements for ProLease and Medisorb technologies, which are not
independently commercializable, could occur; (vii) disputes with Clinical
Partners over rights to the RMP-7 and related technology could occur, or the
Company could fail to purchase this technology from Clinical Partners pursuant
to the purchase option (the "Purchase Option"), or, if the Company did purchase
RMP(TM) technology from Clinical Partners (a) in shares of the Company's common
stock, the Company's shareholders would be substantially diluted or (b) in cash,
the Company's capital resources would be significantly depleted; and (viii)
difficulties or set-backs in obtaining and enforcing Alkermes' patents and
difficulties with the patent rights of others could occur.


                                       26
<PAGE>   27
RESULTS OF OPERATIONS

         The Company's research and development revenue under collaborative
arrangement with related party was $1,415,313, $11,182,741 and $9,277,371 for
the fiscal years ended in 1997, 1996 and 1995, respectively. This revenue was
received from Clinical Partners under a product development agreement entered
into in March 1992. The decrease in such revenue for fiscal 1997 as compared to
fiscal 1996 was a result of the completion of funding from Clinical Partners
pursuant to the product development agreement during the quarter ended June 30,
1996. The increase in such revenue for fiscal 1996 as compared to fiscal 1995
was a result of increased reimbursable costs incurred by the Company pursuant to
such product development agreement. The Company's research and development
revenue under collaborative arrangements was $15,968,317, $2,848,510 and
$3,049,106 for the fiscal years ended in 1997, 1996 and 1995, respectively. The
increase in such revenue for fiscal 1997 as compared to fiscal 1996 was mainly
the result of the funding earned and milestones achieved under new or expanded
collaborative agreements related to the Company's ProLease and Medisorb
technologies. The decrease in such revenue for fiscal 1996 as compared to fiscal
1995 was primarily a result of the completion of the feasibility phase of a
collaborative agreement with Boehringer Mannheim GmbH, partially offset by an
expanded collaboration with Schering-Plough Corporation.

         Interest income was $2,443,317, $1,887,275 and $1,576,794 for the
fiscal years ended in 1997, 1996 and 1995, respectively. The increase in such
revenue for fiscal 1997 as compared to fiscal 1996 was primarily a result of the
investment of the net proceeds of approximately $22.9 million received upon the
consummation of a public offering of the Company's common stock in May 1996 as
well as the investment of the net proceeds of approximately $49.7 million from
the sale to ALZA Corporation of 2,000,000 shares of the Company's common stock
in March 1997. The increase in fiscal 1996 as compared to fiscal 1995 was
primarily a result of the investment of the net proceeds of approximately $14.8
million received upon the consummation of a public offering of the Company's
common stock in September and October 1995.

         The Company's total operating expenses were $38,624,765 for the fiscal
year ended in 1997 as compared to $29,665,610 and $25,807,424 for the fiscal
years ended in 1996 and 1995, respectively. The Company separately recorded a
$750,000 nonrecurring charge in March 1996 for Medisorb technology purchased but
not yet commercially viable. The Company's research and development expenses
were $29,553,988 for the fiscal year ended in 1997 compared to $21,586,316 and
$18,955,347 for the fiscal years ended in 1996 and 1995, respectively. The
increase for fiscal 1997 as compared to fiscal 1996 was mainly as a result of
salary and related benefits and other operating costs associated with the
acquisition of the Medisorb technology and certain related assets in March 1996.
There was also an increase in the purchase of lab supplies and clinical expenses
related primarily to the Company's ProLease and RMP-7 programs, partially offset
by a reduction in the costs of preclinical work in the Company's RMP-7 program
which was completed during the prior year. The increase for fiscal 1996 as
compared to fiscal 1995 was mainly the result of an increase in the purchase of
lab supplies and preclinical and clinical expenses related primarily to the
Company's RMP-7 and ProLease programs.

         General and administrative expenses were $7,689,625, $6,285,700 and
$5,104,062 for the fiscal years ended in 1997, 1996 and 1995, respectively. The
increase for fiscal 1997 as compared to fiscal 1996 was primarily as a result of
salary and related benefits and other operating costs associated with the
acquisition of the Medisorb technology and certain related assets in March 1996
as well as an increase in patent legal costs. The increase for fiscal 1996 as
compared to fiscal 1995 was primarily the result of non-cash charges related to
the write-down of the Company's investments in Clinical Partners and an increase
in patent legal costs and other legal costs associated with financing and other
transactions. In February and April 1996, the Company purchased, for
approximately $2.1 million, 74 Class A units that were owned by investors who
defaulted on their obligations to make installment payments for such units. The
Company wrote down its investment in these Class A units ratably over the period
February through June 1996 as Clinical Partners used these and other funds to
complete its obligation to Alkermes to fund research and development of RMP-7.

         The Company does not believe that inflation and changing prices has had
a material impact on its results of operations.


                                       27
<PAGE>   28
LIQUIDITY AND CAPITAL RESOURCES

         At March 31, 1997, the Company had current assets totaling $89,868,040,
primarily consisting of $2,799,012 in cash and cash equivalents and $82,497,939
in U.S. Treasury Notes and other Government obligations having a maturity of
less than one year; and current liabilities of $8,200,623. The Company's
short-term investment objectives are, first, to assure conservation of
principal, and second, to obtain investment income. As a result, the Company
invests primarily in high grade government or government-backed securities.

         During fiscal 1997, the Company announced three new or expanded
collaborative agreements. Development funding and milestone payments to Alkermes
under these collaborations could exceed $70 million in the aggregate (of which
$14.5 million was earned during fiscal 1997), assuming the development of the
product candidates proceeds as planned.

         In March 1997, the Company completed a private placement of 2,000,000
shares of its common stock at $25 per share. Net proceeds to the Company were
approximately $49.7 million.

         In May 1996, the Company completed a direct public offering of
2,300,000 shares of its common stock at $10 per share. Net proceeds to the
Company were approximately $22.9 million.

         In September 1996, the Company amended its loan agreement with a bank
to increase the principal amount of the loan by $5 million, securing the
existing and the additional principal amount of the loan with a building and
real property pursuant to a mortgage and certain of the Company's equipment
pursuant to a security agreement.

         The Company's research and development costs to date have been financed
primarily by sales of equity securities and research and development
collaborative arrangements. The Company expects to incur significant research
and development and other costs, including costs related to preclinical studies,
clinical trials and facilities expansion. The research and development revenue
from Clinical Partners ended during the quarter ended June 30, 1996. Such
funding was not sufficient to complete clinical trials and seek regulatory
approval of RMP-7. Since the completion of funding from Clinical Partners,
Alkermes has used and intends to continue to use its own resources to develop
RMP-7, but may be forced to seek alternative sources of funding, including
additional collaborators. The Company is required to fund the development of
RMP-7 to maintain its purchase option relating to Clinical Partners. Therefore,
the Company expects that such costs will exceed revenues significantly for the
next several years, which will result in continuing losses from operations.

         The Company expects to begin construction of a new commercial scale
ProLease manufacturing facility in Cambridge, Massachusetts during fiscal 1998.
The Company also expects to begin an expansion of its Medisorb manufacturing
facility in Wilmington, Ohio during fiscal 1998. The total cost for both
facilities is expected to be approximately $15 to $20 million. The Company's
capital expenditures for equipment, facilities and building improvements have
been financed to date primarily with proceeds from bank loans and the sales of
equity securities. The Company will continue to pursue opportunities to obtain
additional financing in the future. Such financing may be sought through various
sources, including equity offerings, bank borrowings, lease arrangements
relating to fixed assets or other financing methods. The source, timing and
availability of any financings will depend on market conditions, interest rates
and other factors.

         The Company believes its current cash, cash equivalents and short-term
investments, combined with anticipated interest income and research and
development revenues under collaborative arrangements, will be sufficient to
meet its anticipated capital requirements through at least March 31, 1999. The
Company's future capital requirements will depend on many factors, including
continued scientific progress in its research and development programs, the
magnitude of these programs, progress with preclinical and clinical trials, the
time and costs involved in obtaining regulatory approvals, the costs involved in
filing, prosecuting and enforcing patent claims, competing technological and
market developments, the establishment of additional collaborative arrangements,
the cost of manufacturing facilities and of commercialization activities and
arrangements and the cost of product in-licensing and any possible acquisitions.


                                       28
<PAGE>   29
         The Company will need to raise substantial additional funds for
longer-term product development, regulatory approvals and manufacturing or
marketing activities that it might undertake in the future. There can be no
assurance that additional funds will be available on favorable terms, if at all.
If adequate funds are not available, the Company may be required to curtail
significantly one or more of its research and development programs and/or obtain
funds through arrangements with collaborative partners or others that may
require the Company to relinquish rights to certain of its technologies, product
candidates or future products.

         As disclosed in Note 2 to the Consolidated Financial Statements, the
adoption of Statement of Financial Accounting Standards (SFAS) No. 128,
"Earnings per Share" in the quarter ended December 31, 1997 is not expected to
have any impact on the Company's consolidated financial statements because the
Company continues to be in a net loss position and, consequently, common
equivalent shares from stock options and warrants are excluded as their effect
is antidilutive.


                                       29
<PAGE>   30
ITEM 8.  FINANCIAL STATEMENTS AND SUPPLEMENTARY DATA


                         ALKERMES, INC. AND SUBSIDIARIES

         CONSOLIDATED FINANCIAL STATEMENTS AS OF MARCH 31, 1997 AND 1996
                      AND FOR THE THREE YEARS IN THE PERIOD
              ENDED MARCH 31, 1997 AND INDEPENDENT AUDITORS' REPORT

                                       30
<PAGE>   31
INDEPENDENT AUDITORS' REPORT


Board of Directors
Alkermes, Inc.
Cambridge, Massachusetts

We have audited the accompanying consolidated balance sheets of Alkermes, Inc.
and subsidiaries as of March 31, 1997 and 1996, and the related consolidated
statements of operations, shareholders' equity, and cash flows for each of the
three years in the period ended March 31, 1997. These financial statements are
the responsibility of the Company's management. Our responsibility is to express
an opinion on these financial statements based on our audits.

We conducted our audits in accordance with generally accepted auditing
standards. Those standards require that we plan and perform the audit to obtain
reasonable assurance about whether the financial statements are free of material
misstatement. An audit includes examining, on a test basis, evidence supporting
the amounts and disclosures in the financial statements. An audit also includes
assessing the accounting principles used and significant estimates made by
management, as well as evaluating the overall financial statement presentation.
We believe that our audits provide a reasonable basis for our opinion.

In our opinion, such consolidated financial statements present fairly, in all
material respects, the financial position of Alkermes, Inc. and subsidiaries as
of March 31, 1997 and 1996, and the results of their operations and their cash
flows for each of the three years in the period ended March 31, 1997 in
conformity with generally accepted accounting principles.

Deloitte & Touche LLP

May 23, 1997
Boston, Massachusetts

                                       31

<PAGE>   32
ALKERMES, INC. AND SUBSIDIARIES

CONSOLIDATED BALANCE SHEETS
MARCH 31, 1997 AND 1996
- --------------------------------------------------------------------------------


<TABLE>
<CAPTION>
ASSETS                                                          1997                  1996    
                                                            -------------         ------------
<S>                                                         <C>                   <C>         
CURRENT ASSETS:                                                                              
                                                                                             
  Cash and cash equivalents                                 $   2,799,012         $    445,150
  Short-term investments                                       82,497,939           31,929,214
  Prepaid expenses and other current assets                     4,571,089            1,957,477
                                                            -------------         ------------
                                                                                             
           Total current assets                                89,868,040           34,331,841
                                                            -------------         ------------
                                                                                             
PROPERTY, PLANT AND EQUIPMENT:                                                               
  Land                                                            225,000              225,000
  Building                                                      1,275,000            1,275,000
  Furniture, fixtures and equipment                            11,963,945            9,864,501
  Leasehold improvements                                        2,183,280            2,008,193
  Construction in progress                                         90,000              147,326
                                                            -------------         ------------
                                                                                             
                                                               15,737,225           13,520,020
                                                                                             
  Less accumulated depreciation and amortization               (7,289,446)          (5,097,882)
                                                            -------------         ------------
                                                                                             
                                                                8,447,779            8,422,138
                                                                                             
INVESTMENTS                                                     5,366,291            1,372,789
                                                            -------------         ------------
                                                                                             
OTHER ASSETS                                                      582,732              747,377
                                                            -------------         ------------
                                                                                             
OTHER INVESTMENTS                                                 432,176              877,928
                                                                                             
                                                                                             
                                                            -------------         ------------
                                                            $ 104,697,018         $ 45,752,073
                                                            =============         ============
</TABLE>


- --------------------------------------------------------------------------------


<TABLE>
<CAPTION>
LIABILITIES AND SHAREHOLDERS' EQUITY                             1997                 1996
                                                            -------------        -------------
<S>                                                         <C>                  <C>          
 CURRENT LIABILITIES:
  Accounts payable and accrued expenses                     $   4,653,081        $   3,522,178
  Long-term obligations - current portion                       3,547,542            2,925,756
                                                            -------------        -------------

           Total current liabilities                            8,200,623            6,447,934
                                                            -------------        -------------

LONG-TERM OBLIGATIONS                                          10,914,127            9,876,347
                                                            -------------        -------------

OTHER LONG-TERM LIABILITIES                                     1,430,832              915,241
                                                            -------------        -------------

DEFERRED REVENUE                                                5,000,000            5,000,000
                                                            -------------        -------------

COMMITMENTS

SHAREHOLDERS' EQUITY:
  Capital stock, par value $.01 per share:
    authorized, 5,000,000 shares; none issued
  Common stock, par value $.01 per share:
    authorized, 40,000,000 shares; issued,
    20,718,790 shares in 1997 and 15,966,942 shares
    in 1996                                                       207,188              159,669
  Additional paid-in capital                                  198,844,191          124,239,023
  Receivable for warrants and deferred compensation              (109,901)            (317,682)
  Cumulative foreign currency translation adjustments             (16,869)             (24,354)
  Unrealized gain on marketable securities                         71,250              502,500
  Accumulated deficit                                        (119,844,423)        (101,046,605)
                                                            -------------        -------------

           Total shareholders' equity                          79,151,436           23,512,551
                                                            -------------        -------------

                                                            $ 104,697,018        $  45,752,073
                                                            =============        =============
</TABLE>


                                       32


See notes to consolidated financial statements.


<PAGE>   33
ALKERMES, INC. AND SUBSIDIARIES

CONSOLIDATED STATEMENTS OF OPERATIONS
YEARS ENDED MARCH 31, 1997, 1996 AND 1995
- --------------------------------------------------------------------------------


<TABLE>
<CAPTION>
                                                            1997                1996                1995
                                                        ------------        ------------        ------------
<S>                                                     <C>                 <C>                 <C>         
REVENUES:
  Research and development revenue under
     collaborative arrangements                         $ 15,968,317        $  2,848,510        $  3,049,106
  Research and development revenue under
     collaborative arrangement with related party          1,415,313          11,182,741           9,277,371
  Interest income                                          2,443,317           1,887,275           1,576,794
                                                        ------------        ------------        ------------

          Total revenues                                  19,826,947          15,918,526          13,903,271
                                                        ------------        ------------        ------------

EXPENSES:
  Research and development                                29,553,988          21,586,316          18,955,347
  General and administrative                               7,689,625           6,285,700           5,104,062
  Interest expense                                         1,381,152           1,043,594             608,015
  Purchase of in-process research and
    development                                                   --             750,000                  --
  Write-down of other investment                                  --                  --           1,140,000
                                                        ------------        ------------        ------------

          Total expenses                                  38,624,765          29,665,610          25,807,424
                                                        ------------        ------------        ------------

NET LOSS                                                $(18,797,818)       $(13,747,084)       $(11,904,153)
                                                        ============        ============        ============

NET LOSS PER WEIGHTED AVERAGE
  NUMBER OF COMMON SHARES                               $      (1.03)       $      (0.93)       $      (0.88)
                                                        ============        ============        ============

WEIGHTED AVERAGE NUMBER OF
  COMMON SHARES OUTSTANDING                               18,288,334          14,774,584          13,535,339
                                                        ============        ============        ============
</TABLE>


See notes to consolidated financial statements.


                                       33


<PAGE>   34
ALKERMES, INC. AND SUBSIDIARIES

CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY
YEARS ENDED MARCH 31, 1997, 1996 AND 1995
- --------------------------------------------------------------------------------

<TABLE>
<CAPTION>
                                                                                          RECEIVABLE     CUMULATIVE
                                                                                              FOR         FOREIGN      UNREALIZED
                                                                          ADDITIONAL      WARRANTS AND    CURRENCY   GAIN (LOSS) ON
                                                    COMMON STOCK           PAID-IN          DEFERRED     TRANSLATION   MARKETABLE   
                                                SHARES       AMOUNT        CAPITAL        COMPENSATION   ADJUSTMENTS   SECURITIES   
<S>                                           <C>           <C>         <C>               <C>            <C>         <C>          
BALANCE, APRIL 1, 1994                        13,520,091    $135,201    $ 109,498,650     $(2,019,775)    $(14,451)    $(330,000)   

  Issuance of common stock, April 1994
    through March 1995                            51,747         517           39,228              --           --            --    

  Warrant exchange and amortization of
    receivable for warrants                           --          --         (354,090)        841,719           --            --    

  Compensation relating to grant of stock
    options and awards made                           --          --          103,320        (103,320)          --            --    

  Amortization of compensation relating to
    grant of stock options and awards made            --          --         (137,937)        469,058           --            --    

  Carrying value adjustments                          --          --               --              --           --       330,000    

  Cumulative foreign currency translation             --          --               --              --        4,150            --    
    adjustments

  Net loss for year                                   --          --               --              --           --            --    
                                              ----------    --------    -------------     -----------     --------     ---------    

BALANCE, MARCH 31, 1995                       13,571,838     135,718      109,149,171        (812,318)     (10,301)           --    

  Issuance of common stock, April 1995
    through March 1996, net of issuance
    costs of $1,281,445                        2,395,104      23,951       15,002,862              --           --            --    
                                                                                                                                    

  Amortization of receivable for warrants             --          --               --         402,259           --            --    

  Amortization of compensation relating to
    grant of stock options and awards made            --          --           86,990          92,377           --            --    

  Unrealized gain on marketable securities            --          --               --              --           --       502,500    

  Cumulative foreign currency translation             --          --               --              --      (14,053)           --    
    adjustments

  Net loss for year                                   --          --               --              --           --            --    
                                              ----------    --------    -------------     -----------     --------     ---------    

BALANCE, MARCH 31, 1996                       15,966,942     159,669      124,239,023        (317,682)     (24,354)      502,500    
</TABLE>

<TABLE>
<CAPTION>
                                                    ACCUMULATED                         
                                                      DEFICIT           TOTAL           
<S>                                                <C>               <C>                
BALANCE, APRIL 1, 1994                             $ (75,395,368)    $ 31,874,257       
                                                                                        
  Issuance of common stock, April 1994                                                  
    through March 1995                                        --           39,745       
                                                                                        
  Warrant exchange and amortization of                                                  
    receivable for warrants                                   --          487,629       
                                                                                        
  Compensation relating to grant of stock                                               
    options and awards made                                   --               --       
                                                                                        
  Amortization of compensation relating to                                              
    grant of stock options and awards made                    --          331,121       
                                                                                        
  Carrying value adjustments                                  --          330,000       
                                                                                        
  Cumulative foreign currency translation                     --            4,150       
    adjustments                                                                             
                                                                                        
  Net loss for year                                  (11,904,153)     (11,904,153)      
                                                   -------------     ------------       
                                                                                        
BALANCE, MARCH 31, 1995                              (87,299,521)      21,162,749       
                                                                                        
  Issuance of common stock, April 1995                                                 
    through March 1996, net of issuance
    costs of $1,281,445                                       --       15,026,813       

  Amortization of receivable for warrants                     --          402,259       
                                                                                        
  Amortization of compensation relating to                                              
    grant of stock options and awards made                    --          179,367       
                                                                                        
  Unrealized gain on marketable securities                    --          502,500       
                                                                                        
  Cumulative foreign currency translation                     --          (14,053)      
    adjustments                                                                             
                                                                                        
  Net loss for year                                  (13,747,084)     (13,747,084)      
                                                   -------------     ------------       
                                                                                        
BALANCE, MARCH 31, 1996                             (101,046,605)      23,512,551       
</TABLE>

                                                                     (Continued)

                                       34


<PAGE>   35


ALKERMES, INC. AND SUBSIDIARIES

CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY
YEARS ENDED MARCH 31, 1997, 1996 AND 1995
- --------------------------------------------------------------------------------


<TABLE>
<CAPTION>
                                                                                         RECEIVABLE    CUMULATIVE
                                                                                            FOR         FOREIGN      UNREALIZED
                                                                            ADDITIONAL  WARRANTS AND    CURRENCY    GAIN (LOSS) ON
                                                         COMMON STOCK         PAID-IN     DEFERRED     TRANSLATION   MARKETABLE     
                                                      SHARES      AMOUNT      CAPITAL   COMPENSATION   ADJUSTMENTS   SECURITIES     

<S>                                                  <C>          <C>       <C>           <C>           <C>         <C>         
BALANCE, MARCH 31, 1996 (CARRIED FORWARD)            15,966,942   159,669   124,239,023    (317,682)    (24,354)        502,500     
                                                                                                              
  Issuance of common stock,  April 1996 through                                                               
    March 1997, net of issuance costs of $390,705     4,751,848    47,519    74,605,168          --          --              --     
                                                                                                                             
                                                                                                              
  Amortization of receivable for warrants                    --        --            --      34,687          --              --     
                                                                                                              
  Amortization of compensation relating to                                                                    
    grant of stock options and awards made                   --        --            --     173,094          --              --     
                                                                                                              
  Unrealized loss on marketable securities                   --        --            --          --          --        (431,250)    
                                                                                                              
  Cumulative foreign currency translation                    --        --            --          --       7,485              --     
    adjustments                                                                                                   
                                                                                                              
  Net loss for year                                          --        --            --          --          --              --     
                                                     ----------  --------  ------------   ---------    --------       ---------     
                                                                                                              
BALANCE, MARCH 31, 1997                              20,718,790  $207,188  $198,844,191   $(109,901)   $(16,869)      $  71,250     
                                                     ==========  ========  ============   =========    ========       =========     
</TABLE>


<TABLE>
<CAPTION>
                                                   ACCUMULATED                       
                                                     DEFICIT             TOTAL           
<S>                                               <C>               <C>            
BALANCE, MARCH 31, 1996 (CARRIED FORWARD)          (101,046,605)      23,512,551     
                                                                                     
  Issuance of common stock,  April 1996 through                                      
    March 1997, net of issuance costs of $390,705            --       74,652,687     
                                                                                    
  Amortization of receivable for warrants                    --           34,687     
                                                                                     
  Amortization of compensation relating to                                           
    grant of stock options and awards made                   --          173,094     
                                                                                     
  Unrealized loss on marketable securities                   --         (431,250)    
                                                                                     
  Cumulative foreign currency translation                    --            7,485     
    adjustments                                                                          
                                                                                     
  Net loss for year                                 (18,797,818)     (18,797,818)    
                                                  -------------     ------------     
                                                                                     
BALANCE, MARCH 31, 1997                           $(119,844,423)    $ 79,151,436     
                                                  =============     ============     
</TABLE>
                                                  

See notes to consolidated financial statements. 


                                                                     (Concluded)


                                       35


<PAGE>   36
ALKERMES, INC. AND SUBSIDIARIES

CONSOLIDATED STATEMENTS OF CASH FLOWS
YEARS ENDED MARCH 31, 1997, 1996 AND 1995
- --------------------------------------------------------------------------------


<TABLE>
<CAPTION>
                                                                          1997             1996             1995
<S>                                                                   <C>              <C>              <C>          
CASH FLOWS FROM OPERATING ACTIVITIES:
  Net loss                                                            $(18,797,818)    $(13,747,084)    $(11,904,153)
  Adjustments to reconcile net loss to net cash used by
    operating activities:
      Depreciation and amortization                                      2,358,843        1,770,242        1,426,068
      Amortization of amounts receivable for warrants and
        compensation relating to grant of stock options and awards                                                  
        made                                                               207,781          581,626          818,750
      Adjustments to other investments                                      14,502          101,742        1,474,934
      Changes in assets and liabilities:
        Prepaid expenses and other current assets                       (2,617,365)         830,500           26,049
        Accounts payable and accrued expenses                            1,143,447          960,670          256,067
        Deferred revenue from Alkermes Clinical Partners, L.P.                  --       (1,585,000)      (1,215,000)
        Other long-term liabilities                                        515,591          540,406           61,611
        Deferred revenue                                                        --        5,000,000               --
                                                                      ------------     ------------     ------------

               Net cash used by operating activities                   (17,175,019)      (5,546,898)      (9,055,674)
                                                                      ------------     ------------     ------------

CASH FLOWS FROM INVESTING ACTIVITIES:
   Additions to property, plant  and equipment, net                     (2,243,476)      (5,606,737)        (629,935)
   (Purchases) sales of short-term investments, net                    (50,568,725)     (11,665,073)       5,031,130
   (Purchases) sales of investments, net                                (3,993,502)       2,994,437        1,133,969
   Other assets                                                             10,500         (209,500)          20,500
   Investment in Alkermes Clinical Partners, L.P.                               --       (2,122,463)        (126,959)
   Repayment of loan to Alkermes Clinical Partners, L.P.                        --        4,735,000               --
                                                                      ------------     ------------     ------------

               Net cash (used by) provided by investing activities     (56,795,203)     (11,874,336)       5,428,705
                                                                      ------------     ------------     ------------

CASH FLOWS FROM FINANCING ACTIVITIES:
   Proceeds from issuance of common stock, net                          74,652,687       15,026,813           39,745
   Proceeds from issuance of long-term debt                              5,000,000        4,500,000        4,500,000
   Payment of long-term obligations                                     (3,338,054)      (2,733,061)      (2,479,359)
                                                                      ------------     ------------     ------------

              Net cash provided by financing activities                 76,314,633       16,793,752        2,060,386
                                                                      ------------     ------------     ------------

EFFECT OF EXCHANGE RATE CHANGES ON CASH                                      9,451          (13,995)             619
                                                                      ------------     ------------     ------------

NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS                     2,353,862         (641,477)      (1,565,964)

CASH AND CASH EQUIVALENTS, BEGINNING OF YEAR                               445,150        1,086,627        2,652,591
                                                                      ------------     ------------     ------------

CASH AND CASH EQUIVALENTS, END OF YEAR                                $  2,799,012     $    445,150     $  1,086,627
                                                                      ============     ============     ============

SUPPLEMENTARY INFORMATION - Interest paid                             $    788,102     $    492,731     $    568,198
                                                                      ============     ============     ============
</TABLE>


See notes to consolidated financial statements.


                                       36
<PAGE>   37



ALKERMES, INC. AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
YEARS ENDED MARCH 31, 1997, 1996 AND 1995
- --------------------------------------------------------------------------------


1.   FORMATION OF THE COMPANY

     Alkermes, Inc. (the "Company") was incorporated in July 1987 and is a
     leader in the development of products based on sophisticated drug delivery
     technologies. Alkermes' focus is on two important drug delivery
     opportunities: (i) controlled, sustained release of injectable drugs
     lasting several days to several weeks, utilizing its ProLease(R) and
     Medisorb(R) technologies; and (ii) the delivery of drugs into the brain
     past the blood-brain barrier, utilizing RMP-7(TM) technology.

2.   SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

     PRINCIPLES OF CONSOLIDATION - The consolidated financial statements include
     the accounts of Alkermes, Inc. and its wholly owned subsidiaries, Alkermes
     Controlled Therapeutics, Inc. ("ACTI"), Alkermes Controlled Therapeutics,
     Inc. II ("ACT II") (see Note 3), Alkermes Investments, Inc., Alkermes
     Development Corporation II ("ADC II") and Alkermes Europe, Ltd. ADC II
     serves as the one percent general partner of Alkermes Clinical Partners,
     L.P. ("Clinical Partners"), a limited partnership engaged in a research and
     development project with the Company (see Note 7). ADC II's investment in
     Clinical Partners is accounted for under the equity method of accounting.
     All significant intercompany balances and transactions have been
     eliminated.

     USE OF ESTIMATES - The preparation of the Company's consolidated financial
     statements in conformity with generally accepted accounting principles
     necessarily requires management to make estimates and assumptions that
     affect the reported amounts of assets and liabilities and disclosure of
     contingent assets and liabilities at the date of the consolidated financial
     statements and the reported amounts of revenues and expenses during the
     reporting period. Actual results could differ from those estimates.

     FAIR VALUE OF FINANCIAL INSTRUMENTS - Statement of Financial Accounting
     Standards ("SFAS") No. 107, "Disclosures About Fair Value of Financial
     Instruments," requires disclosure of the fair value of certain financial
     instruments. The carrying amounts of cash, cash equivalents, accounts
     payable and accrued expenses approximate fair value because of their
     short-term nature. Marketable equity securities are recorded in the
     consolidated financial statements at amortized cost which approximates fair
     value. The carrying amounts of the Company's debt instruments approximate
     fair value.

     NET LOSS PER WEIGHTED AVERAGE NUMBER OF COMMON SHARES - Net loss per share
     is computed using the weighted average number of common shares outstanding
     during the period.

     RESEARCH AND DEVELOPMENT REVENUES - Research and development revenues are
     recorded as services are performed. Revenue earned upon the attainment of
     research and development milestones is recorded when achieved.

     RESEARCH AND DEVELOPMENT EXPENSES - Research and development expenses are
     charged to operations as incurred.

     INCOME TAXES - The Company accounts for income taxes under SFAS No. 109,
     "Accounting for Income Taxes." SFAS No. 109 requires the recognition of
     deferred tax assets and liabilities relating to the expected future tax
     consequences of events that have been recognized in the Company's
     consolidated financial statements and tax returns (see Note 6).


                                       37
<PAGE>   38
2.   SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (CONTINUED)

     CASH EQUIVALENTS - Cash equivalents, with purchased maturities of three
     months or less, consist of money market accounts.

     INVESTMENTS - Securities that the Company has the positive intent and
     ability to hold to maturity are reported at amortized cost and are
     classified as "held-to-maturity."

     Short-term investments and investments consist of U.S. Treasury and other
     government securities which are classified as "held-to-maturity" and
     reported at amortized cost. Short-term investments and investments have
     maturity dates within one year of the balance sheet date. Investments
     classified as long-term include securities held as collateral. The carrying
     value of all investments approximated market value at March 31, 1997 and
     1996.

     Included in other investments is an investment in Cortex Pharmaceutical
     Inc.'s common stock, which is classified as "available-for-sale" and
     reported at fair market value. During the year ended March 31, 1995, the
     Company recorded a charge to operations of $1,140,000 due to other than
     temporary reductions in the market value of such investment. Other
     investments also include ADC II's investment in Clinical Partners.

     PROPERTY, PLANT AND EQUIPMENT - Property, plant and equipment are recorded
     at cost. Depreciation and amortization are provided using the straight-line
     method over the following estimated useful lives of the assets: buildings -
     25 years; furniture, fixtures and equipment - 3 to 5 years; or, in the case
     of leasehold improvements and capital leases, over the lease terms - 3 to
     10 years.

     DEFERRED REVENUE - LONG-TERM - During fiscal 1996, the Company received a
     $5,000,000 prepayment of royalties under a collaborative agreement. This
     amount has been recorded as deferred revenue at March 31, 1997 and 1996 and
     accrues interest (included in other long-term liabilities) at a rate
     (6.15625% at March 31, 1997) equal to .20% above the one-year LIBOR rate.

     LICENSE AGREEMENTS AND PURCHASED PATENTS - License agreements and purchased
     patents, included in other assets, are amortized on a straight-line basis
     over a period of five years.

     RECEIVABLE FOR WARRANTS AND DEFERRED COMPENSATION - Receivable for warrants
     is comprised of amounts receivable related to warrants issued in connection
     with the capitalization of Clinical Partners and was amortized as revenues
     were earned from Clinical Partners. Deferred compensation is related to
     both the Company's 1991 Restricted Common Stock Award Plan and compensatory
     stock options and is amortized over vesting periods ranging from one to
     five years.

     NEW ACCOUNTING PRONOUNCEMENTS - In March 1995, the Financial Accounting
     Standards Board ("FASB") issued SFAS No. 121, "Accounting for the
     Impairment of Long-Lived Assets and for Long-Lived Assets to Be Disposed
     Of," which requires the Company to review for impairment of long-lived
     assets, certain identifiable intangibles and goodwill related to those
     assets whenever events or changes in circumstances indicate that the
     carrying amount of an asset may not be recoverable. In certain situations,
     an impairment loss would be recognized. The Company adopted SFAS No. 121
     during fiscal 1997. The adoption did not have a material effect on the
     Company's consolidated financial position, results of operations or cash
     flows.


                                       38
<PAGE>   39
2.   SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (CONTINUED)

     NEW ACCOUNTING PRONOUNCEMENTS (CONTINUED) - In fiscal 1997, the Company
     also implemented the disclosure requirements of SFAS No. 123, "Accounting
     for Stock-Based Compensation." The Company continues to account for its
     stock-based transactions with employees in accordance with Accounting
     Principles Board Opinion No. 25 ("APB No. 25"), "Accounting for Stock
     Issued to Employees," and will provide pro forma disclosures of net loss
     and net loss per share as if the fair value basis method prescribed by SFAS
     No. 123 had been applied in measuring employee compensation expense (see
     Note 10).

     In February 1997, the FASB issued SFAS No. 128, "Earnings per Share," in
     which the Company is required to adopt in the quarter ending December 31,
     1997. SFAS No. 128 requires companies to change the method currently used
     to compute earnings per share and to restate all prior periods for
     comparability. The adoption of SFAS No. 128 is not expected to have any
     impact on the Company's consolidated financial statements because the
     Company continues to be in a net loss position and, consequently, common
     equivalent shares from stock options and warrants are excluded as their
     effect is antidilutive.

3.   ACQUISITION OF CERTAIN ASSETS AND TECHNOLOGY

     On March 8, 1996, ACT II acquired certain assets and technology owned or
     used by Medisorb Technologies International L.P., a leader in the
     development of injectable controlled release drug delivery technologies for
     the pharmaceutical industry. The assets acquired included a large scale
     pharmaceutical production facility and equipment. The Company paid
     $4,000,000 in cash for the assets and technology. A nonrecurring charge
     totaling $750,000 for technology purchased but not yet commercially viable
     was recorded by the Company at the acquisition date. This charge represents
     that portion of the purchase price of the acquired technology that was
     allocated to research and development in-process.

4.   SHAREHOLDERS' EQUITY

     In September and October 1995, the Company completed an underwritten public
     offering of 2,300,000 shares of its common stock at $7.00 per share. Net
     proceeds to the Company were approximately $14,800,000.

     In May 1996, the Company completed a direct public offering of 2,300,000
     shares of its common stock at $10.00 per share. Net proceeds to the Company
     were approximately $22,900,000.

     In March 1997, the Company completed a private placement of 2,000,000
     shares of its common stock at $25.00 per share. Net proceeds to the Company
     were approximately $49,700,000.


                                       39
<PAGE>   40
5.   LONG-TERM OBLIGATIONS

     Long-term obligations at March 31 consist of:
<TABLE>
<CAPTION>

                                                                     1997               1996
<S>                                                              <C>                <C>        
     Notes payable to a bank bearing interest at fixed rates
       (8.00%-8.54%), payable in monthly installments,
        maturing 1997 through 2001                               $ 6,436,903        $ 3,246,427

     Notes payable to a bank bearing interest at fixed rates
       (6.35%-7.96%), payable in quarterly installments
       of $375,000, maturing in 2000                               4,500,000          6,000,000

     Note payable to corporate partner bearing interest at the
       prime rate (8.50% at March 31, 1997), maturing in 2000      3,500,000          3,500,000
    
     Other                                                            24,766             55,676
                                                                 -----------        -----------
    
                                                                  14,461,669         12,802,103

     Less current portion                                          3,547,542          2,925,756
                                                                 -----------        -----------

                                                                 $10,914,127        $ 9,876,347
                                                                 ===========        ===========
</TABLE>


     The first bank loan is secured by a building and real property pursuant to
     a mortgage and certain of the Company's equipment pursuant to security
     agreements. The loan is also secured by cash collateral (included in
     long-term investments at March 31, 1997) having a minimum market value of
     the lesser of $1,000,000 or the outstanding principal amount of the loan.
     Under the terms of the loan agreement, the Company is required to maintain
     a minimum unencumbered balance of cash and permitted investments and a
     minimum ratio of unencumbered cash and permitted investments to
     indebtedness.

     The second bank loan agreement requires the Company to maintain a minimum
     net worth, a maximum ratio of total liabilities to net worth, a minimum
     current ratio and a minimum unencumbered balance of cash and permitted
     investments. Upon the breach of any of these financial covenants or the
     occurrence of any other event of default under the loan agreement, the
     Company would be required to deposit an amount equal to the then
     outstanding principal balance of the loan plus three months' interest into
     a restricted account at the bank. Under the terms of the loan agreement,
     the bank would have the right to liquidate such account and apply the
     proceeds to repayment of the loan if the Company's unencumbered cash and
     investment balance falls below $5,000,000.

     In January 1995, the Company borrowed $3,500,000 from a corporate partner.
     The principal amount of the loan, together with interest, is payable in the
     Company's common stock or cash, at the Company's option.


                                       40
<PAGE>   41
5.   LONG-TERM OBLIGATIONS (CONTINUED)

     At March 31, 1997, the maturities of the long-term obligations are as
     follows:
<TABLE>
<CAPTION>

                          NOTES PAYABLE
                            AND OTHER

<S>                       <C>       
     1998                  $3,547,542
     1999                   2,805,794
     2000                   6,300,000
     2001                   1,225,000
     2002                     583,333
                          -----------

                          $14,461,669
                          ===========
</TABLE>


6.   INCOME TAXES

     At March 31, 1997, the Company has approximately $53,522,000 of net
     operating loss ("NOL") carryforwards for U.S. federal income tax purposes
     and approximately $3,802,000 of research and development tax credits
     available to offset future federal income tax, subject to limitations for
     alternative minimum tax. The NOL and research and development credit
     carryforwards are subject to examination by the tax authorities and expire
     in various years from 2002 through 2012.

     The components of the net deferred income tax assets at March 31 are as
     follows:
<TABLE>
<CAPTION>

                                                              1997                1996

<S>                                                      <C>                 <C>     
     Acquired technology                                    $884,000            $884,000
     Capitalized research and development
       expenses, net of amortization                      14,535,000          12,146,000
     U.S. NOL carryforwards                               21,495,000          15,557,000
     Tax credit carryforwards                              4,840,000           3,491,000
     Alkermes Europe NOL carryforward                      2,152,000           1,373,000
     Other                                                 1,070,000             709,000
     Less valuation allowance                            (44,976,000)        (34,160,000)

                                                         -----------         -----------
             
                                                         $       -           $       -
                                                         ===========         ===========
</TABLE>


     The valuation allowance has been provided because of the uncertainty of
     realizing the future benefits of the net deferred income tax assets. In
     fiscal 1996, the valuation allowance increased by $5,241,000.

     The ACTI NOL carryforwards and ACTI research and development credit
     carryforwards of approximately $4,780,000 and $790,000, respectively,
     acquired from Enzytech, Inc. are only available to offset future taxable
     income of ACTI.


                                       41
<PAGE>   42
7.   RELATED-PARTY TRANSACTIONS

     On April 10, 1992, the Company and Clinical Partners, a limited partnership
     of which ADC II is the general partner, sold in a private placement (i) 920
     Class A units, each unit (a "Class A Unit") consisting of one Class A
     limited partnership interest in Clinical Partners, a 1992 warrant (a "1992
     Warrant") to purchase 2,800 shares of the Company's common stock and a 1995
     warrant (a "1995 Warrant") to purchase 300 shares of the Company's common
     stock; and (ii) one Class B unit (the "Class B Unit"), consisting of one
     Class B limited partnership interest in Clinical Partners, a 1992 warrant
     (the "Class B 1992 Warrant") to purchase 5,600 shares of the Company's
     common stock and a 1995 warrant (the "Class B 1995 Warrant") to purchase
     600 shares of the Company's common stock. The purchase price was $50,000
     for each Class A Unit and $100,000 for the Class B Unit, the unpaid
     portions of which were evidenced by investor notes which were payable in
     annual installments through April 15, 1995.

     In connection with the offering, the Company also issued, to an affiliate
     of the sales agent for the Class A Units, warrants (the "Incentive
     Warrants") to purchase 77,100 shares of the Company's common stock and
     issued, to another affiliate of the sales agent, a warrant (the "Affiliate
     Warrant") to purchase 13,300 shares of the Company's common stock.

     The net proceeds of the offering were used primarily to fund the further
     development and clinical testing of a family of molecules designated by the
     Company as Receptor-Mediated Permeabilizers(TM) ("RMPs"(TM)) for human
     pharmaceutical use in the United States and Canada. Proprietary RMP(TM)
     molecules developed by the Company may enhance the passage of small drug
     molecules from the bloodstream into the brain. Pursuant to the Product
     Development Agreement entered into in March 1992, the Company licensed to
     Clinical Partners certain of its technology relating to RMPs. Research and
     development of RMPs is being conducted by the Company for Clinical Partners
     pursuant to the Product Development Agreement. The Company was reimbursed
     by Clinical Partners for its actual costs incurred in conducting such
     research and development and also received a management fee of 10% of such
     costs. Such funding ended during the quarter ended June 30, 1996. Such
     funding was not sufficient to complete clinical trials and seek regulatory
     approval of RMP-7. Since the completion of funding from Clinical Partners,
     Alkermes has used its own resources to develop RMP-7, but may be forced to
     seek alternative sources of funding, including additional collaborators.
     The Company is required to fund the development of RMP-7 to maintain the
     Purchase Option as defined below.

     Clinical Partners has granted the Company an exclusive interim license to
     manufacture and market RMPs for human pharmaceutical use in the United
     States and Canada. Upon the first marketing approval of an RMP product by
     the United States Food and Drug Administration, the Company is obligated to
     make a payment to Clinical Partners equal to 20% of the aggregate capital
     contributions (approximately $8,300,000) of all partners (the "milestone
     payment"). Additionally, the Company will make royalty payments to Clinical
     Partners equal to 12% of United States and Canadian revenues and 10% of
     European revenues, in certain circumstances, from any sales of RMPs by the
     Company. The interim license will terminate if the Company does not
     exercise the Purchase Option.


                                       42
<PAGE>   43
7.   RELATED-PARTY TRANSACTIONS (CONTINUED)

     The 1992 Warrants, the 1995 Warrants (collectively, the "Class A
     Warrants"), the Class B 1992 Warrant and the Class B 1995 Warrant
     (collectively, the "Class B Warrants") were issued by the Company in
     consideration of the grant by each limited partner to the Company of an
     option to purchase (the "Purchase Option"), under certain circumstances,
     the limited partnership interest in Clinical Partners held by such limited
     partner. Upon exercise of such purchase option, each Class A limited
     partner will be entitled to receive an initial payment, at the Company's
     option, of $40,000 in cash or approximately $42,100 in the Company's common
     stock, as well as certain additional payments (which are subject to certain
     limitations) based on the Company's net revenues from sales of RMPs in the
     United States, Canada and Europe as follows:

     -    12% of net revenues to the Company on sales of RMPs in the United
          States and Canada and 10% of net revenues to the Company on sales of
          RMPs in Europe, until each Class A limited partner has received an
          aggregate of $400,000 per interest from the initial payment and the
          royalty stream; thereafter,

     -    9% of net revenues to the Company on sales of RMPs in the United
          States, Canada and Europe, until each Class A limited partner has
          received an aggregate of $500,000 per interest from the initial
          payment and the royalty stream; and thereafter,

     -    4% of net revenues to the Company on sales of RMPs in the United
          States, Canada and Europe.

     Royalties on sales of RMPs in Europe will be payable only to the extent
     necessary to pay projected distributions in any year. If royalties on sales
     of RMPs in the United States and Canada in any year equal or exceed the
     projected distributions for such year, no royalties on European sales will
     be paid in that year.

     The 1992 Warrants and the Class B 1992 Warrant may be exercised during the
     period beginning on August 1, 1994 and ending on July 31, 1999, and upon
     the payment of a warrant exercise price per share of $20.03. The 1995
     Warrants and the Class B 1995 Warrant may be exercised during the period
     beginning on April 15, 1995 and ending on April 14, 2000, and upon the
     payment of a warrant exercise price of $3.54.

     The Company completed an exchange offer on January 27, 1995 with respect to
     the warrants issued in 1992 in connection with the formation of Clinical
     Partners. Pursuant to the exchange offer, Class A limited partners had the
     option to exchange both their Class A 1992 Warrants and Class A 1995
     Warrants for a new 1994 Class A Warrant to purchase, at $5.00 per share,
     and during the period beginning on April 1, 1995 and ending on March 31,
     2000, 1,700 shares of the Company's common stock for every 3,100 shares of
     common stock issuable upon exercise of the Class A 1992 Warrant and Class A
     1995 Warrant exchanged therefor. The Class B limited partner had the option
     to exchange both the Class B 1992 and Class B 1995 Warrants for a new 1994
     Class B Warrant to purchase 3,400 shares of the Company's common stock at
     $5.00 per share. The 1994 Class B Warrant is exercisable during the same
     period as the 1994 Class A Warrants.


                                       43
<PAGE>   44
7.   RELATED-PARTY TRANSACTIONS (CONTINUED)

     Of the Class A 1992 Warrants and Class A 1995 Warrants originally issued,
     approximately 92% were exchanged in response to the exchange offer. The
     Class B 1992 Warrant and the Class B 1995 Warrant, the Affiliate Warrant
     and the Incentive Warrants were also exchanged in the exchange offer for
     new warrants entitling the holders thereof to purchase an aggregate of
     3,400, 7,293 and 42,280 shares of common stock, respectively. The exchange
     offer resulted in a decrease of 1,225,927 shares of common stock which are
     issuable upon exercise of the Company's outstanding warrants.

     In order to fund organizational and offering costs, the Company loaned
     Clinical Partners, at the closing of the private placement, $4,735,000. The
     loan was secured by a pledge of the investor notes, bore interest at 7.5%
     per annum, payable annually in arrears, and was paid in April 1995.

     In February and April 1996, the Company purchased from Clinical Partners an
     aggregate of 74 Class A Units that were owned by investors who defaulted on
     their payment obligations. The total purchase price for such Units was the
     aggregate amount of unpaid installments, approximately $2,052,000. The
     Company wrote down its investment in these Class A Units ratably over the
     period February through June 1996 as Clinical Partners used these and other
     funds to complete its obligation to the Company to fund research and
     development of RMP-7.

8.   RESEARCH AND DEVELOPMENT ARRANGEMENTS

     The Company has entered into several collaborative agreements with
     corporate partners ("partners") to provide research and development
     activities relating to the partners' products. In connection with these
     agreements, the Company has granted certain licenses or the right to obtain
     certain licenses to technology developed by the Company. In return for such
     grants, the Company will receive certain payments upon the achievement of
     certain milestones and will receive royalties on sales of products
     developed under the terms of the agreements. In addition to research and
     development funding, during fiscal 1997 the Company received $900,000
     representing three milestone payments under these agreements. Additionally,
     the Company may obtain the right to manufacture and supply products
     developed under certain of these agreements.

9.   COMMITMENTS

     LEASE COMMITMENTS - The Company leases certain of its offices and research
     laboratories under operating leases with initial terms of one to ten years
     expiring between 1998 and 2008. The leases contain provisions for
     extensions for up to ten years. Total annual future minimum lease payments
     are as follows:

<TABLE>
<S>                                         <C>       
        1998                                $2,684,000
        1999                                 2,016,000
        2000                                 2,035,000
        2001                                 1,497,000
        2002                                 1,175,000
        Thereafter                           1,789,000
</TABLE>

                      

     Rent expense charged to operations was approximately $3,342,000, $2,439,000
     and $2,589,000 for the years ended March 31, 1997, 1996 and 1995,
     respectively.


                                       44
<PAGE>   45
9.   COMMITMENTS (CONTINUED)

     LEASE COMMITMENTS (CONTINUED) - Additionally, a U.S. Treasury Bill with a
     total principal amount of $257,000 is being held by a bank in the Company's
     name as a security deposit on the leases and, accordingly, has been
     classified as a long-term investment at March 31, 1997.

     LICENSE AND ROYALTY COMMITMENTS - The Company has entered into license
     agreements with certain corporations and universities which require the
     Company to pay annual license fees and royalties based on a percentage of
     revenues from sales of certain products and royalties from sublicenses
     granted by the Company. Amounts paid under these agreements were
     approximately $92,000, $127,000 and $117,000 for the years ended March 31,
     1997, 1996 and 1995, respectively.

10.  STOCK OPTIONS AND AWARDS

     During fiscal 1996, the Company adopted the Stock Option Plan for
     Non-Employee Directors (the "Director Plan"), which provides for the
     granting of stock options to non-employee directors of the Company. The
     Company's Amended and Restated 1989 Non-Qualified Stock Option Plan (the
     "1989 Plan"), Amended and Restated 1990 Omnibus Stock Option Plan, as
     amended (the "1990 Plan"), and 1992 Non-Qualified Stock Option Plan (the
     "1992 Plan") provide for the granting of stock options to employees,
     officers and directors of, and consultants to, the Company. Nonqualified
     options to purchase up to 225,000 shares of the Company's common stock may
     be granted under the 1989 Plan, nonqualified and incentive options to
     purchase up to 1,750,000 shares of the Company's common stock may be
     granted under the 1990 Plan, nonqualified options to purchase up to
     1,000,000 shares of the Company's common stock may be granted under the
     1992 Plan and nonqualified options to purchase up to 150,000 shares of the
     Company's common stock may be granted under the Director Plan. Unless
     sooner terminated, the 1989 Plan will terminate on July 18, 1999, the 1990
     Plan will terminate on September 19, 2000, the 1992 Plan will terminate on
     November 11, 2002 and the Director Plan will terminate on March 18, 2006.

     The Compensation Committee of the Board of Directors administers the 1989
     Plan, the 1990 Plan and the 1992 Plan and determines who is to receive
     options and the exercise price and terms of such options. The Board of
     Directors administers the Director Plan. The option exercise price of stock
     options granted under the 1989 Plan, the 1990 Plan and the Director Plan
     may not be less than 100% of the fair market value of the common stock on
     the date of grant. Under the terms of the 1992 Plan, the option exercise
     price may be below the fair market value, but not below par value, of the
     underlying stock at the time the option is granted.

     The 1989 Plan, the 1990 Plan and the 1992 Plan also provide that the
     Compensation Committee may grant Limited Stock Appreciation Rights
     ("LSARs") with respect to all or any portion of the shares covered by stock
     options granted to directors and executive officers. LSARs may be granted
     with the grant of a nonqualified stock option or at any time during the
     term of such option but may only be granted with the grant of an incentive
     stock option. The grant of LSARs will not be effective until six months
     after their date of grant. Upon the occurrence of certain triggering
     events, the options with respect to which LSARs have been granted shall
     become immediately exercisable and the persons who have received LSARs will
     automatically receive a cash payment in lieu of shares. Through March 31,
     1997, LSARs have been granted under the 1990 Plan with respect to options
     to purchase 425,750 shares.


                                       45
<PAGE>   46
10.  STOCK OPTIONS AND AWARDS (CONTINUED)

     The Company has also adopted the 1991 Restricted Common Stock Award Plan
     (the "Award Plan"). The Award Plan provides for the award to certain
     eligible employees, officers and directors of, and consultants to, the
     Company of up to a maximum of 250,000 shares of common stock. The Award
     Plan is administered by the Compensation Committee. Awards generally vest
     over five years. Through March 31, 1997, 1996 and 1995, an aggregate of
     77,000, 77,000 and 77,000 shares of common stock , respectively, have been
     awarded under the Award Plan, of which 2,400, 13,200 and 7,900 shares
     ceased to be subject to forfeiture and were issued during the years ended
     March 31, 1997, 1996 and 1995, respectively. In addition, zero, 5,000 and
     6,900 shares were canceled during the years ended March 31, 1997, 1996 and
     1995, respectively. The Award Plan will terminate on November 15, 2001,
     unless sooner terminated by the Board of Directors.

     The Company has reserved a total of 2,376,852 shares of common stock for
     issuance under the five plans.

     The Company has elected to continue to follow APB No. 25 for accounting for
     its employee stock options. Under APB No. 25, no compensation expense is
     recognized with respect to the grant of any stock options in which the
     exercise price of the Company's employee stock options equals the fair
     market price of the underlying stock on the date the option is granted.

     Pro forma information regarding net loss and net loss per share in fiscal
     1997 and 1996 has been determined as if the Company had accounted for its
     employee stock options under the fair value method prescribed by SFAS No.
     123. The resulting effect on pro forma net loss and net loss per share
     disclosed below for fiscal 1997 and 1996 is not likely to be representative
     of the effects on net loss and net loss per share on a pro forma basis in
     future years, because fiscal 1996 and 1997 pro forma results include the
     impact of only one and two years, respectively, of grants and related
     vesting. The fair value of options was estimated at the date of grant using
     the Black-Scholes option valuation model with the following weighted
     average assumptions: risk-free interest rates ranging from 6.60% - 6.84%
     for fiscal 1997 and 5.96% - 6.17% for fiscal 1996; dividend yields of 0% in
     fiscal 1997 and 1996; volatility factors of the expected market price of
     the Company's common stock of 67% in fiscal 1997 and 65% in fiscal 1996;
     and a weighted average expected life of 2.5 years in fiscal 1997 and 1996.
     Using the Black-Scholes option valuation model, the weighted average fair
     value of options granted in fiscal 1997 and 1996 was $8.00 and $2.96,
     respectively.

     For purposes of pro forma disclosures, the estimated fair value of options
     is amortized to pro forma expense over the vesting period of the option.
     Pro forma information for the years ended March 31 is as follows:

<TABLE>
<CAPTION>
                                                           1997                  1996

<S>                                                    <C>                   <C>         
       Net loss - as reported                          $(18,797,818)        $(13,747,084)
       Net loss - pro forma                            $(19,971,317)        $(13,972,561)
       Net loss per share - as reported                $   (1.03)           $    (0.93)
       Net loss per share - pro forma                  $   (1.09)           $    (0.95)
</TABLE>


                                       46
<PAGE>   47
10.  STOCK OPTIONS AND AWARDS (CONTINUED)

     A summary of option activity under the 1989, 1990, 1992 and Director Plans
     is as follows:

<TABLE>
<CAPTION>

                                                    EXERCISE            WEIGHTED
                                 NUMBER               PRICE              AVERAGE
                                   OF                  PER              EXERCISE
                                 SHARES               SHARE               PRICE
                                                                     
<S>                            <C>               <C>                    <C>       
Balance, April 1, 1994          1,328,501         $ .56 - $21.00        $  7.22
                                                                        
  Granted                       1,210,765          2.01 -   7.00           3.53
  Exercised                       (43,847)          .56 -   1.00            .90
  Canceled                     (1,038,126)          .60 -  21.00           8.98
                                ---------                               
                                                                        
Balance, March 31, 1995         1,457,293           .56 -  14.875          3.09
                                                                        
  Granted                         445,450          2.81 -  10.31           5.73
  Exercised                       (60,199)          .56 -   3.69           1.63
  Canceled                       (106,540)         1.00 -   9.13           3.80
                                ---------                               
Balance, March 31, 1996         1,736,004           .56 -  14.875          3.78
                                                                        
  Granted                         449,650          9.31 -  28.75          14.53
  Exercised                      (142,575)          .56 -  14.875          3.43
  Canceled                        (70,670)         1.00 -  14.88           4.90
                                ---------                               
                                                                        
Balance, March 31, 1997         1,972,409         $ .56 - $28.75        $  6.22
                                =========         ==============        =======
</TABLE>


     During fiscal 1995, a significant number of outstanding options were
     canceled in exchange for the grant of fewer options with an exercise price
     equal to the fair market value of the common stock on the date of grant of
     $3.69 per share. These options vest over three years. Other options granted
     generally vest over four years, except options granted under the Director
     Plan which vest after six months.

     The following table summarizes information concerning outstanding and
     exercisable options as of March 31, 1997:

<TABLE>
<CAPTION>

                                            OPTIONS OUTSTANDING                    OPTIONS EXERCISABLE
                           -----------------------------------------------       ------------------------
                                                 WEIGHTED           
                                                 AVERAGE         WEIGHTED                       WEIGHTED
                                                REMAINING         AVERAGE                        AVERAGE
         RANGE OF              NUMBER          CONTRACTUAL       EXERCISE           NUMBER      EXERCISE
     EXERCISE PRICES         OUTSTANDING           LIFE            PRICE         EXERCISABLE      PRICE

<S>                          <C>               <C>               <C>             <C>            <C>  
       $0.56-$3.50             590,026             6.38            $2.09           363,032        $1.43
        3.63-4.00              676,020             7.28             3.78           406,817         3.77
        4.06-14.31             587,613             9.12            11.01           104,848         8.25
       14.44-28.75             118,750             9.27            16.81            10,000        14.88
                               -------                                             -------       
                                                                                                 
                             1,972,409             7.68             6.22           884,697         3.46
                             =========                                             =======       
                                                                                              
</TABLE>


                                       47
<PAGE>   48
10.  STOCK OPTIONS AND AWARDS (CONTINUED)

     For certain stock options granted and awards made, the Company recognizes,
     as compensation expense, the excess of the intrinsic value for accounting
     purposes of the common stock issuable upon exercise of such stock options
     over the aggregate exercise price thereof and, in connection with stock
     awards, the fair market value of the Company's common stock on the date of
     the award. This compensation expense is amortized ratably over the vesting
     period of each stock option and stock award. For the years ended March 31,
     1997, 1996 and 1995, compensation expense of $173,094, $179,367 and
     $331,121, respectively, was recorded and will aggregate a maximum of
     $109,901 over the remaining terms of such stock options granted and stock
     awards made.

                                   * * * * * *


                                       48
<PAGE>   49
ITEM 9. CHANGES IN AND DISAGREEMENTS WITH ACCOUNTANTS ON ACCOUNTING AND
        FINANCIAL DISCLOSURE

     Not applicable.

                                    PART III

ITEM 10. DIRECTORS AND EXECUTIVE OFFICERS OF THE REGISTRANT

     (a) Directors. The information with respect to directors required by this
item is incorporated herein by reference to pages 2, 3, 12 and 18-20 of the
Registrant's Proxy Statement dated June 27, 1997 for the Registrant's annual
shareholders' meeting to be held on July 25, 1997 (the "1997 Proxy Statement").

     (b) Executive Officers. The information with respect to executive officers
required by this item is set forth in Part I of this Report.


ITEM 11. EXECUTIVE COMPENSATION

     The information required under this item is incorporated herein by
reference to pages 7 through 17 of the 1997 Proxy Statement.

ITEM 12. SECURITY OWNERSHIP OF CERTAIN BENEFICIAL OWNERS AND MANAGEMENT

     The information required by this item is incorporated herein by reference
to pages 18 through 20 of the 1997 Proxy Statement.

ITEM 13. CERTAIN RELATIONSHIPS AND RELATED TRANSACTIONS

     The information required by this item is incorporated herein by reference
to page 20 of the 1997 Proxy Statement.


                                     PART IV

ITEM 14. EXHIBITS, FINANCIAL STATEMENT SCHEDULES, AND REPORTS ON FORM 8-K

     (a) Documents filed as part of the Report:

          (1)  Consolidated Financial Statements of the Registrant and
               Independent Auditors' Report thereon:

               Consolidated Balance Sheets, March 31, 1997 and 1996.


                                       49
<PAGE>   50
               Consolidated Statements of Operations for the Years Ended March
               31, 1997, 1996 and 1995.

               Consolidated Statements of Shareholders' Equity for the Years
               Ended March 31, 1997, 1996 and 1995.

               Consolidated Statements of Cash Flows for the Years Ended March
               31, 1997, 1996 and 1995.

               Notes to Consolidated Financial Statements.


          (2)  Financial Statement Schedules:

               Schedules have been omitted because of the absence of conditions
               under which they are required or because the required information
               is included in the financial statements or the notes thereto.


          (3)  Exhibits

Exhibit No.
- -----------

     3.1(a)    Second Amended and Restated Articles of Incorporation of
               Alkermes, Inc. effective July 23, 1991. (Incorporated by
               reference to Exhibit 4.1(a) to the Registrant's Report on Form
               10-Q for the quarter ended June 30, 1991.)

     3.1(b)    Statement of Change of Registered Office of Alkermes, Inc.
               effective July 23, 1991. (Incorporated by reference to Exhibit
               4.1(b) to the Registrant's Report on Form 10-Q for the quarter
               ended June 30, 1991.)

     3.1(c)    Amendment to Second Amended and Restated Articles of
               Incorporation, as filed with the Pennsylvania Secretary of State
               on November 1, 1991. (Incorporated by reference to Exhibit 4.1(c)
               to the Registrant's Report on Form 10-Q for the quarter ended
               September 30, 1991.)

     3.1(d)    Amendment to the Second Amended and Restated Articles of
               Incorporation, as amended, as filed with the Pennsylvania
               Secretary of State on February 12, 1993. (Incorporated by
               reference to Exhibit 4.1(d) to the Registrant's Report on Form
               10-Q for the quarter ended December 31, 1992.)

     3.2       Amended and Restated By-Laws of Alkermes, Inc., effective as of
               July 1, 1994. (Incorporated by reference to Exhibit 4.2 to the
               Registrant's Report on Form 10-Q for the quarter ended June 30,
               1994.)

     4.1       Specimen of Common Stock Certificate of Alkermes, Inc.
               (Incorporated by reference to Exhibit 4 to the Registrant's
               Registration Statement on Form S-1, as amended (File No.
               33-40250).)

                                       50
<PAGE>   51
     4.2       Form of 1992 Warrant to purchase 2,800 shares of the Registrant's
               Common Stock. (Incorporated by reference to Exhibit 4.2 to the
               Registrant's Report on Form 10-K for the fiscal year ended March
               31, 1992.)

     4.3       Form of 1995 Warrant to purchase 300 shares of the Registrant's
               Common Stock. (Incorporated by reference to Exhibit 4.3 to the
               Registrant's Report on Form 10-K for the fiscal year ended March
               31, 1992.)

     4.4       Form of Global Warrant Certificate for 1994 Class A Warrants.
               (Incorporated by reference to Exhibit 4.6 to the Registrant's
               Report on Form 10-Q for the quarter ended December 31, 1994.)

     4.5       Form of Global Warrant Certificate for 1994 Class B Warrants.
               (Incorporated by reference to Exhibit 4.7 to the Registrant's
               Report on Form 10-Q for the quarter ended December 31, 1994.)

     4.6       Form of Global Warrant Certificate for 1994 Affiliate Warrants.
               (Incorporated by referenced to Exhibit 4.8 to the Registrant's
               Report on Form 10-Q for the quarter ended December 31, 1994.)

     4.7       Form of Global Warrant Certificate for 1994 Incentive Warrants.
               (Incorporated by reference to Exhibit 4.9 to the Registrant's
               Report on Form 10-Q for the quarter ended December 31, 1994.)

     4.8       Warrant Agreement, dated as of November 18, 1994, by and between
               the Registrant and The First National Bank of Boston.
               (Incorporated by reference to Exhibit 4.10 to the Registrant's
               Report on Form 10-Q for the quarter ended December 31, 1994.)

     4.9       Stock Purchase Agreement, dated as of February 13, 1997, between
               the Registrant and ALZA Corporation. (Incorporated by reference
               to Exhibit 4.5 to the Registrant's Registration Statement on Form
               S-3, as amended (File No. 333-19955).)

     10.1      Amended and Restated 1989 Non-Qualified Stock Option Plan, as
               amended. (Incorporated by reference to Exhibit 4.2(c) to the
               Registrant's Registration Statement on Form S-8 (File No.
               33-44752).)+

     10.2      Amended and Restated 1990 Omnibus Stock Option Plan, as amended.+

     10.3      1991 Restricted Common Stock Award Plan. (Incorporated by
               reference to Exhibit 4.2(a) to the Registrant's Registration
               Statement on Form S-8 (File No. 33-44752).)+

     10.4      1992 Non-Qualified Stock Option Plan. (Incorporated by reference
               to Exhibit 10.26 to the Registrant's Registration Statement on
               Form S-4, as amended (File No. 33-54932).)+


                                       51
<PAGE>   52
     10.5      Stock Option Plan for Non-Employee Directors. (Incorporated by
               reference to Exhibit 10.5 to the Registrant's Report on Form 10-K
               for the fiscal year ended March 31, 1996.)+

     10.6      Lease, dated as of September 18, 1991, between Forest City 64
               Sidney Street, Inc. and the Registrant. (Incorporated by
               reference to Exhibit 10.19 to the Registrant's Report on Form
               10-K for the fiscal year ended March 31, 1992.)

     10.6(a)   First Amendment of Lease, dated September 18, 1992, between
               Forest City 64 Sidney Street, Inc. and the Registrant.
               (Incorporated by reference to Exhibit 10.24 to the Registrant's
               Registration Statement on Form S-4, as amended (File No. 33-
               54932).)

     10.7      Lease, dated as of March 16, 1990, between Forest City 64 Sidney
               Street, Inc. and Enzytech, Inc. (Incorporated by reference to
               Exhibit 10.25 to the Registrant's Registration Statement on Form
               S-4, as amended (File No. 33-54932).)

     10.8      Lease, dated July 26, 1993, between the Massachusetts Institute
               of Technology and Alkermes, Inc.

     10.8(a)   First Amendment of Lease, dated June 9, 1997, between the
               Massachusetts Institute of Technology and Alkermes, Inc.

     10.9      Product Development Agreement, dated as of March 6, 1992, between
               the Partnership and the Registrant. (Incorporated by reference to
               Exhibit 10.21 to the Registrant's Report on Form 10-K for the
               fiscal year ended March 31, 1992.)

     10.10     Purchase Agreement, dated as of March 6, 1992, by and among the
               Registrant and each of the Limited Partners, from time to time,
               of the Partnership. (Incorporated by reference to Exhibit 10.22
               to the Registrant's Report on Form 10-K for the fiscal year ended
               March 31, 1992.)

     10.11     Alkermes Clinical Partners, L.P. Agreement of Limited
               Partnership, dated as of February 7, 1992. (Incorporated by
               reference to Exhibit 10.23 to the Registrant's Report on Form
               10-K for the fiscal year ended March 31, 1992.)

     10.11(a)  Amendment No. 1 to Alkermes Clinical Partners, L.P. Agreement of
               Limited Partnership, dated as of September 29, 1992.
               (Incorporated by reference to Exhibit 10.22(a) to the
               Registrant's Registration Statement on Form S-4, as amended (File
               No. 33-54932).)

     10.11(b)  Amendment No. 2 to Alkermes Clinical Partners, L.P. Agreement of
               Limited Partnership, dated as of March 30, 1993. (Incorporated by
               reference to Exhibit 10.22(b) to the Registrant's Registration
               Statement on Form S-3, as amended (File No. 33-64964).)

     10.12     Class A Note of Alkermes Development Corporation II, dated April
               10, 1992, to PaineWebber Development Corporation in the amount of
               $100.00. (Incorporated


                                       52
<PAGE>   53
               by reference to Exhibit 10.24 to the Registrant's Report on Form
               10-K for the fiscal year ended March 31, 1992.)

     10.13     License Agreement, dated February 5, 1990, between Enzytech, Inc.
               and Massachusetts Institute of Technology. (Incorporated by
               reference to Exhibit 10.36 to the Registrant's Registration
               Statement on Form S-4, as amended (File No. 33-54932).)*

     10.14     Development and License Agreement, dated February 4, 1992,
               between Enzytech, Inc. and Schering Corporation. (Incorporated by
               reference to Exhibit 10.38 to the Registrant's Registration
               Statement on Form S-4, as amended (File No. 33-54932).)*

     10.14(a)  Amendment to Development and License Agreement, dated July 26,
               1995, between Alkermes Controlled Therapeutics, Inc. and Schering
               Corporation. (Incorporated by reference to Exhibit 10.1 to the
               Registrant's Report on Form 10-Q for the quarter ended June 30,
               1995.)**

     10.15     Prepaid Royalty Agreement, dated July 26, 1995, between Alkermes
               Controlled Therapeutics, Inc. and Schering Corporation.
               (Incorporated by reference to Exhibit 10.2 to the Registrant's
               Report on Form 10-Q for the quarter ended June 30, 1995.)**

     10.16     Development and License Agreement, dated as of August 1, 1996, by
               and between The R.W. Johnson Pharmaceutical Research Institute,
               Alkermes Controlled Therapeutics, Inc. and the Registrant.
               (Incorporated by reference to Exhibit 10.1 to the Registrant's
               Report on Form 8-K dated November 14, 1996.)***

     10.17     Supply and License Agreement dated as of August 1, 1996, by and
               between The R.W. Johnson Pharmaceutical Research Institute,
               Alkermes Controlled Therapeutics, Inc. and the Registrant.
               (Incorporated by reference to Exhibit 10.2 to the Registrant's
               Report on Form 8-K dated November 14, 1996.)***

     10.18     Collaborative Development Agreement, dated as of January 9, 1995,
               by and between Genentech, Inc. and Alkermes Controlled
               Therapeutics, Inc. (Incorporated by reference to Exhibit 10.27 to
               the Registrant's Report on Form 10-Q for the quarter ended
               December 31, 1994.)****

     10.19     Note Purchase Agreement, dated as of January 9, 1995, by the
               between the Registrant and Genentech, Inc. (Incorporated by
               reference to Exhibit 10.28 to the Registrant's Report on Form
               10-Q for the quarter ended December 31, 1994.)

     10.20     Convertible Promissory Note of the Registrant dated January 31,
               1995. (Incorporated by reference to Exhibit 10.28 to the
               Registrant's Report on Form 10-Q for the quarter ended December
               31, 1994.)

     10.21     License Agreement, dated as of November 13, 1996, by and between
               Genentech, Inc. and Alkermes Controlled Therapeutics, Inc.
               (Incorporated by reference to


                                       53
<PAGE>   54
               Exhibit 10.3 to the Registrant's Report on Form 8-K dated
               November 14, 1996.)***

     10.22     Development Agreement, dated as of December 23, 1993, between
               Medisorb Technologies International L.P. and Janssen
               Pharmaceutica International. (Incorporated by reference to
               Exhibit 10.18 to the Registrant's report on Form 10-K for the
               fiscal year ended March 31, 1996.)#

     10.22(a)  First Amendment to Development Agreement, dated as of December
               23, 1993, between Medisorb Technologies International L.P. and
               Janssen Pharmaceutica International. (Incorporated by reference
               to Exhibit 10.18(a) to the Registrant's report on Form 10-K for
               the Fiscal year ended March 31, 1996.)#

     10.22(b)  Second Amendment to the Development Agreement, dated April 28,
               1997, by and between Alkermes Controlled Therapeutics Inc. II,
               Janssen Pharmaceutica International and Janssen Pharmaceutica
               Inc.

     10.23     License Agreement, dated as of February 13, 1996, between
               Medisorb Technologies International L.P. and Janssen
               Pharmaceutica International (United States). (Incorporated by
               reference to Exhibit 10.19 to the Registrant's report on Form
               10-K for the fiscal year ended March 31, 1996.)#

     10.24     License Agreement, dated as of February 21, 1996, between
               Medisorb Technologies International L.P. and Janssen
               Pharmaceutica International (worldwide except United States).
               (Incorporated by reference to Exhibit 10.20 to the Registrant's
               report on Form 10-K for the fiscal year ended March 31, 1996.)#

     10.25     Loan Agreement, dated December 30, 1993, among the Registrant,
               Alkermes Investments, Inc. and The Daiwa Bank, Limited.
               (Incorporated by reference to Exhibit 10.33 to the Registrant's
               Report on Form 10-Q for the quarter ended December 31, 1993.)

     10.25(a)  Amendment No. 1 to Loan Agreement, dated as of December 31, 1994,
               among the Registrant, Alkermes Investments, Inc. and The Daiwa
               Bank, Limited. (Incorporated by reference to Exhibit 10.21(a) to
               the Registrant's report on Form 10-K for the fiscal year ended
               March 31, 1996.)

     10.25(b)  Amendment to Loan Agreement, dated as of December 29, 1995, by
               and among Registrant, Alkermes Investments, Inc. and The Daiwa
               Bank, Limited (Incorporated by reference to Exhibit 10.3 to the
               Registrant's Report on Form 10-Q for the quarter ended December
               31, 1995.)

     10.25(c)  Omnibus Amendment to Loan Documents, dated as of July 26, 1996,
               among the Registrant, Alkermes Investments, Inc. and The Sumitomo
               Bank, Limited (as assignee of The Daiwa Bank, Limited).
               (Incorporated by reference to Exhibit 10.4 to the Registrant's
               Report on Form 10-Q for the quarter ended December 31, 1996.)


                                       54
<PAGE>   55
     10.26     Second Amended and Restated Note, dated July 26, 1996, by
               Registrant and Alkermes Investments, Inc. to The Sumitomo Bank,
               Limited. (Incorporated by reference to Exhibit 10.5 to the
               Registrant's Report on Form 10-Q for the quarter ended December
               31, 1996.)

     10.27     Letter Agreement, dated September 27, 1996, by and among Fleet
               National Bank, Alkermes Controlled Therapeutics, Inc., Alkermes
               Controlled Therapeutic Inc. II and the Registrant. (Incorporated
               by reference to Exhibit 10.3 to the Registrant's Report on Form
               10-Q for the quarter ended September 30, 1996.)##

     10.27(a)  Loan Supplement and Modification Agreement, dated as of June 2,
               1997, by and among Fleet National Bank, Alkermes Controlled
               Therapeutics, Inc., Alkermes Controlled Therapeutics Inc. II and
               the Registrant.

     10.28     Security Agreement, dated as of September 27, 1996, from the
               Registrant, Alkermes Controlled Therapeutics, Inc. and Alkermes
               Controlled Therapeutic Inc. II to Fleet National Bank.
               (Incorporated by reference to Exhibit 10.4 to the Registrant's
               Report on Form 10-Q for the quarter ended September 30, 1996.)

     10.29     Pledge Agreement, dated as of September 27, 1996, from the
               Registrant to Fleet National Bank. (Incorporated by reference to
               Exhibit 10.5 to the Registrant's Report on Form 10-Q for the
               quarter ended September 30, 1996.)

     10.30     Mortgage and Security Agreement, dated as of September 27, 1996,
               from Alkermes Controlled Therapeutics Inc. II to Fleet National
               Bank. (Incorporated by reference to Exhibit 10.6 to the
               Registrant's Report on Form 10-Q for the quarter ended September
               30, 1996.)

     10.31     Environmental Indemnity Agreement, dated as of September 27,
               1996, from the Registrant and Alkermes Controlled Therapeutics
               Inc. II to Fleet National Bank. (Incorporated by reference to
               Exhibit 10.7 to the Registrant's Report on Form 10-Q for the
               quarter ended September 30, 1996.)

     10.32     Promissory Note of the Registrant, dated December 23, 1994, to
               Fleet Bank of Massachusetts, N.A. (Incorporated by reference to
               Exhibit 10.20 to the Registrant's Report on Form 10-Q for the
               quarter ended December 31, 1994.)

     10.32(a)  Allonge to Promissory Note, dated as of September 27, 1996,
               executed by Fleet National Bank, Alkermes Controlled
               Therapeutics, Inc. and the Registrant. (Incorporated by reference
               to Exhibit 10.1 to the Registrant's Report on Form 10-Q for the
               quarter ended September 30, 1996.)

     10.33     Promissory Note, dated December 19, 1995, by Registrant to Fleet
               Bank of Massachusetts, N.A. (Incorporated by reference to Exhibit
               10.2 to the Registrant's Report on From 10-Q for the quarter
               ended December 31, 1995.)

     10.33(a)  Allonge to Promissory Note, dated as of September 27, 1996,
               executed by Fleet National Bank, Alkermes Controlled
               Therapeutics, Inc. and the Registrant.


                                       55
<PAGE>   56
               (Incorporated by reference to Exhibit 10.2 to the Registrant's
               Report on Form 10-Q for the quarter ended September 30, 1996.)

     10.34     Promissory Note, dated September 27, 1996, from the Registrant
               and Alkermes Controlled Therapeutics Inc. II to Fleet National
               Bank. (Incorporated by reference to Exhibit 10.8 to the
               Registrant's Report on Form 10-Q for the quarter ended September
               30, 1996.)

     10.35     Promissory Note, dated June 2, 1997, from the Registrant,
               Alkermes Controlled Therapeutics, Inc. and Alkermes Controlled
               Therapeutics Inc. II to Fleet National Bank.

     10.36     Employment Agreement, entered into as of February 7, 1991,
               between Richard F. Pops and the Registrant. (Incorporated by
               reference to Exhibit 10.12 to the Registrant's Registration
               Statement on Form S-1, as amended (File No. 33-40250).)+

     10.37     Employment Agreement, entered into as of June 13, 1994, by and
               between Robert A. Breyer and the Registrant. (Incorporated by
               reference to Exhibit 10.28 to the Registrant's Report on Form
               10-K for the fiscal year ended March 31, 1994.)+

     11        Statement re: computation of per share earnings.

     21        Subsidiaries of the Registrant.

     22        Proxy Statement dated June 27, 1997.

     23        Consent of Deloitte & Touche LLP.

     27        Financial Data Schedule.


*    Confidential status has been granted for certain provisions thereof
     pursuant to a Commission Order granted January 8, 1993. Such provisions
     have been filed separately with the Commission.

**   Confidential status has been granted for certain portions thereof pursuant
     to a Commission Order granted September 19, 1995. Such provisions have been
     filed separately with the Commission.

***  Confidential status has been granted for certain portions thereof pursuant
     to a Commission Order granted April 25, 1997. Such provisions have been
     filed separately with the Commission.

**** Confidential status has been granted for certain portions thereof pursuant
     to a Commission Order granted March 24, 1995. Such provisions have been
     filed separately with the Commission.


                                       56
<PAGE>   57
#    Confidential status has been granted for certain portions thereof pursuant
     to a Commission Order granted September 3, 1996. Such provisions have been
     filed separately with the Commission.

##   Confidential status has been granted for certain portions thereof pursuant
     to a Commission Order granted April 17, 1997. Such provisions have been
     filed separately with the Commission.

+    Constitutes a management contract or compensatory plan required to be filed
     as an Exhibit to this Report pursuant to Item 14(c) of Form 10-K.


          (b)  Since the beginning of the quarter ended March 31, 1997, the
               Registrant filed on January 3, 1997, a report on Form 8-K, dated
               November 14, 1996, and also filed reports on Form 8-K dated
               February 13, 1997 and March 31, 1997, each reporting under Item
               5.


                                   UNDERTAKING

          For the purposes of complying with the amendments to the rules
governing Form S-8 (effective July 13, 1990) under the Securities Act of 1933,
the undersigned Registrant hereby undertakes as follows, which undertaking shall
be incorporated by reference into Registrant's Registration Statements on Form
S-8, Nos. 33-44752, 33-58330, 33-97468, and 333-13283.

          Insofar as indemnification for liabilities arising under the
Securities Act of 1933 may be permitted to directors, officers and controlling
persons of the Registrant, the Registrant has been advised that in the opinion
of the Securities and Exchange Commission such indemnification is against public
policy as expressed in the Securities Act of 1933 and is, therefore,
unenforceable. In the event that a claim for indemnification against such
liabilities (other than the payment by the Registrant of expenses incurred or
paid by a director, officer or controlling person of the Registrant in the
successful defense of any action, suit or proceeding) is asserted by such
director, officer or controlling person in connection with the securities being
registered, the Registrant will, unless in the opinion of its counsel the matter
has been settled by controlling precedent, submit to a court of appropriate
jurisdiction the question whether such indemnification by it is against public
policy as expressed in the Act and will be governed by the final adjudication of
such issue.


                                       57
<PAGE>   58
                                   SIGNATURES

         Pursuant to the requirements of Section 13 or 15(d) of the Securities
Exchange Act of 1934, the Registrant has duly caused this report to be signed on
its behalf by the undersigned, thereunto duly authorized.

                                         ALKERMES, INC.


June 27, 1997                            By:  /s/ Richard F. Pops
                                             ------------------------------
                                              Richard F. Pops
                                              Chief Executive Officer

         Pursuant to the requirements of the Securities Exchange Act of 1934,
this report has been signed below by the following persons on behalf of the
Registrant and in the capacities and on the dates indicated.


<TABLE>
<CAPTION>
Signature                                 Title                               Date
- ---------                                 -----                               ----
<S>                              <C>                                      <C> 
/s/ Michael A. Wall              Director and Chairman of the             June 27, 1997
- ---------------------------      Board
Michael A. Wall                  


/s/ Richard F. Pops              Director and Chief Executive Officer     June 27, 1997
- ---------------------------      (Principal Executive Officer)
Richard F. Pops                  


/s/ Michael J. Landine           Senior Vice President, Chief             June 27, 1997
- ---------------------------      Financial Officer and    
Michael J. Landine               Treasurer (Principal     
                                 Financial and Accounting 
                                 Officer)                 


/s/ Floyd Bloom                  Director                                 June 27, 1997
- ---------------------------
Floyd Bloom


 /s/ Robert A. Breyer            President and Chief Operating            June 27, 1997
- ---------------------------      Officer and Director
Robert A. Breyer                 


 /s/ John K. Clarke              Director                                 June 27, 1997
- ---------------------------
John K. Clarke
</TABLE>


                                       58
<PAGE>   59
<TABLE>
<CAPTION>
<S>                              <C>                                      <C> 
/s/ Robert S. Langer             Director                                 June 27, 1997
- ---------------------------
Robert S. Langer


/s/ Alexander Rich               Director                                 June 27, 1997
- ---------------------------
Alexander Rich


/s/ Paul Schimmel                Director                                 June 27, 1997
- ---------------------------
Paul Schimmel
</TABLE>


                                       59
<PAGE>   60
                                  Exhibit Index


3.1(a)   Second Amended and Restated Articles of Incorporation of Alkermes, Inc.
         effective July 23, 1991. (Incorporated by reference to Exhibit 4.1(a)
         to the Registrant's Report on Form 10-Q for the quarter ended June 30,
         1991.)

3.1(b)   Statement of Change of Registered Office of Alkermes, Inc. effective
         July 23, 1991. (Incorporated by reference to Exhibit 4.1(b) to the
         Registrant's Report on Form 10-Q for the quarter ended June 30, 1991.)

3.1(c)   Amendment to Second Amended and Restated Articles of Incorporation, as
         filed with the Pennsylvania Secretary of State on November 1, 1991.
         (Incorporated by reference to Exhibit 4.1(c) to the Registrant's Report
         on Form 10-Q for the quarter ended September 30, 1991.)

3.1(d)   Amendment to the Second Amended and Restated Articles of Incorporation,
         as amended, as filed with the Pennsylvania Secretary of State on
         February 12, 1993. (Incorporated by reference to Exhibit 4.1(d) to the
         Registrant's Report on Form 10-Q for the quarter ended December 31,
         1992.)

3.2      Amended and Restated By-Laws of Alkermes, Inc., effective as of July 1,
         1994. (Incorporated by reference to Exhibit 4.2 to the Registrant's
         Report on Form 10-Q for the quarter ended June 30, 1994.)

4.1      Specimen of Common Stock Certificate of Alkermes, Inc. (Incorporated by
         reference to Exhibit 4 to the Registrant's Registration Statement on
         Form S-1, as amended (File No. 33-40250).)

4.2      Form of 1992 Warrant to purchase 2,800 shares of the Registrant's
         Common Stock. (Incorporated by reference to Exhibit 4.2 to the
         Registrant's Report on Form 10-K for the fiscal year ended March 31,
         1992.)

4.3      Form of 1995 Warrant to purchase 300 shares of the Registrant's Common
         Stock. (Incorporated by reference to Exhibit 4.3 to the Registrant's
         Report on Form 10-K for the fiscal year ended March 31, 1992.)

4.4      Form of Global Warrant Certificate for 1994 Class A Warrants.
         (Incorporated by reference to Exhibit 4.6 to the Registrant's Report on
         Form 10-Q for the quarter ended December 31, 1994.)

4.5      Form of Global Warrant Certificate for 1994 Class B Warrants.
         (Incorporated by reference to Exhibit 4.7 to the Registrant's Report on
         Form 10-Q for the quarter ended December 31, 1994.)


<PAGE>   61


4.6      Form of Global Warrant Certificate for 1994 Affiliate Warrants.
         (Incorporated by referenced to Exhibit 4.8 to the Registrant's Report
         on Form 10-Q for the quarter ended December 31, 1994.)

4.7      Form of Global Warrant Certificate for 1994 Incentive Warrants.
         (Incorporated by reference to Exhibit 4.9 to the Registrant's Report on
         Form 10-Q for the quarter ended December 31, 1994.)

4.8      Warrant Agreement, dated as of November 18, 1994, by and between the
         Registrant and The First National Bank of Boston. (Incorporated by
         reference to Exhibit 4.10 to the Registrant's Report on Form 10-Q for
         the quarter ended December 31, 1994.)

4.9      Stock Purchase Agreement, dated as of February 13, 1997, between the
         Registrant and ALZA Corporation. (Incorporated by reference to Exhibit
         4.5 to the Registrant's Registration Statement on Form S-3, as amended
         (File No. 333-19955).)

10.1     Amended and Restated 1989 Non-Qualified Stock Option Plan, as amended.
         (Incorporated by reference to Exhibit 4.2(c) to the Registrant's
         Registration Statement on Form S-8 (File No. 33-44752).)+

10.2     Amended and Restated 1990 Omnibus Stock Option Plan, as amended.+

10.3     1991 Restricted Common Stock Award Plan. (Incorporated by reference to
         Exhibit 4.2(a) to the Registrant's Registration Statement on Form S-8
         (File No. 33-44752).)+

10.4     1992 Non-Qualified Stock Option Plan. (Incorporated by reference to
         Exhibit 10.26 to the Registrant's Registration Statement on Form S-4,
         as amended (File No. 33-54932).)+

10.5     Stock Option Plan for Non-Employee Directors. (Incorporated by
         reference to Exhibit 10.5 to the Registrant's Report on Form 10-K for
         the fiscal year ended March 31, 1996.)+

10.6     Lease, dated as of September 18, 1991, between Forest City 64 Sidney
         Street, Inc. and the Registrant. (Incorporated by reference to Exhibit
         10.19 to the Registrant's Report on Form 10-K for the fiscal year ended
         March 31, 1992.)

10.6(a)  First Amendment of Lease, dated September 18, 1992, between Forest City
         64 Sidney Street, Inc. and the Registrant. (Incorporated by reference
         to Exhibit 10.24 to the Registrant's Registration Statement on Form
         S-4, as amended (File No. 33-54932).)

10.7     Lease, dated as of March 16, 1990, between Forest City 64 Sidney
         Street, Inc. and Enzytech, Inc. (Incorporated by reference to Exhibit
         10.25 to the Registrant's Registration Statement on Form S-4, as
         amended (File No. 33-54932).)

10.8     Lease, dated July 26, 1993, between the Massachusetts Institute of
         Technology and Alkermes, Inc.

10.8(a)  First Amendment of Lease, dated June 9, 1997, between the Massachusetts
         Institute of Technology and Alkermes, Inc.


<PAGE>   62


10.9     Product Development Agreement, dated as of March 6, 1992, between the
         Partnership and the Registrant. (Incorporated by reference to Exhibit
         10.21 to the Registrant's Report on Form 10-K for the fiscal year ended
         March 31, 1992.)

10.10    Purchase Agreement, dated as of March 6, 1992, by and among the
         Registrant and each of the Limited Partners, from time to time, of the
         Partnership. (Incorporated by reference to Exhibit 10.22 to the
         Registrant's Report on Form 10-K for the fiscal year ended March 31,
         1992.)

10.11    Alkermes Clinical Partners, L.P. Agreement of Limited Partnership,
         dated as of February 7, 1992. (Incorporated by reference to Exhibit
         10.23 to the Registrant's Report on Form 10-K for the fiscal year ended
         March 31, 1992.)

10.11(a) Amendment No. 1 to Alkermes Clinical Partners, L.P. Agreement of
         Limited Partnership, dated as of September 29, 1992. (Incorporated by
         reference to Exhibit 10.22(a) to the Registrant's Registration
         Statement on Form S-4, as amended (File No. 33-54932).)

10.11(b) Amendment No. 2 to Alkermes Clinical Partners, L.P. Agreement of
         Limited Partnership, dated as of March 30, 1993. (Incorporated by
         reference to Exhibit 10.22(b) to the Registrant's Registration
         Statement on Form S-3, as amended (File No. 33-64964).)

10.12    Class A Note of Alkermes Development Corporation II, dated April 10,
         1992, to PaineWebber Development Corporation in the amount of $100.00.
         (Incorporated by reference to Exhibit 10.24 to the Registrant's Report
         on Form 10-K for the fiscal year ended March 31, 1992.)

10.13    License Agreement, dated February 5, 1990, between Enzytech, Inc. and
         Massachusetts Institute of Technology. (Incorporated by reference to
         Exhibit 10.36 to the Registrant's Registration Statement on Form S-4,
         as amended (File No. 33-54932).)*

10.14    Development and License Agreement, dated February 4, 1992, between
         Enzytech, Inc. and Schering Corporation. (Incorporated by reference to
         Exhibit 10.38 to the Registrant's Registration Statement on Form S-4,
         as amended (File No. 33-54932).)*

10.14(a) Amendment to Development and License Agreement, dated July 26, 1995,
         between Alkermes Controlled Therapeutics, Inc. and Schering
         Corporation. (Incorporated by reference to Exhibit 10.1 to the
         Registrant's Report on Form 10-Q for the quarter ended June 30,
         1995.)**

10.15    Prepaid Royalty Agreement, dated July 26, 1995, between Alkermes
         Controlled Therapeutics, Inc. and Schering Corporation. (Incorporated
         by reference to Exhibit 10.2 to the Registrant's Report on Form 10-Q
         for the quarter ended June 30, 1995.)**

10.16    Development and License Agreement, dated as of August 1, 1996, by and
         between The R.W. Johnson Pharmaceutical Research Institute, Alkermes
         Controlled Therapeutics, Inc. and the Registrant. (Incorporated by
         reference to Exhibit 10.1 to the Registrant's Report on Form 8-K dated
         November 14, 1996.)***


<PAGE>   63


10.17    Supply and License Agreement dated as of August 1, 1996, by and between
         The R.W. Johnson Pharmaceutical Research Institute, Alkermes Controlled
         Therapeutics, Inc. and the Registrant. (Incorporated by reference to
         Exhibit 10.2 to the Registrant's Report on Form 8-K dated November 14,
         1996.)***

10.18    Collaborative Development Agreement, dated as of January 9, 1995, by
         and between Genentech, Inc. and Alkermes Controlled Therapeutics, Inc.
         (Incorporated by reference to Exhibit 10.27 to the Registrant's Report
         on Form 10-Q for the quarter ended December 31, 1994.)****

10.19    Note Purchase Agreement, dated as of January 9, 1995, by the between
         the Registrant and Genentech, Inc. (Incorporated by reference to
         Exhibit 10.28 to the Registrant's Report on Form 10-Q for the quarter
         ended December 31, 1994.)

10.20    Convertible Promissory Note of the Registrant dated January 31, 1995.
         (Incorporated by reference to Exhibit 10.28 to the Registrant's Report
         on Form 10-Q for the quarter ended December 31, 1994.)

10.21    License Agreement, dated as of November 13, 1996, by and between
         Genentech, Inc. and Alkermes Controlled Therapeutics, Inc.
         (Incorporated by reference to Exhibit 10.3 to the Registrant's Report
         on Form 8-K dated November 14, 1996.)***

10.22    Development Agreement, dated as of December 23, 1993, between Medisorb
         Technologies International L.P. and Janssen Pharmaceutica
         International. (Incorporated by reference to Exhibit 10.18 to the
         Registrant's report on Form 10-K for the fiscal year ended March 31,
         1996.)#

10.22(a) First Amendment to Development Agreement, dated as of December 23,
         1993, between Medisorb Technologies International L.P. and Janssen
         Pharmaceutica International. (Incorporated by reference to Exhibit
         10.18(a) to the Registrant's report on Form 10-K for the Fiscal year
         ended March 31, 1996.)#

10.22(b) Second Amendment to the Development Agreement, dated April 28, 1997, by
         and between Alkermes Controlled Therapeutics Inc. II, Janssen
         Pharmaceutica International and Janssen Pharmaceutica Inc.

10.23    License Agreement, dated as of February 13, 1996, between Medisorb
         Technologies International L.P. and Janssen Pharmaceutica International
         (United States). (Incorporated by reference to Exhibit 10.19 to the
         Registrant's report on Form 10-K for the fiscal year ended March 31,
         1996.)#

10.24    License Agreement, dated as of February 21, 1996, between Medisorb
         Technologies International L.P. and Janssen Pharmaceutica International
         (worldwide except United States). (Incorporated by reference to Exhibit
         10.20 to the Registrant's report on Form 10-K for the fiscal year ended
         March 31, 1996.)#


<PAGE>   64


10.25    Loan Agreement, dated December 30, 1993, among the Registrant, Alkermes
         Investments, Inc. and The Daiwa Bank, Limited. (Incorporated by
         reference to Exhibit 10.33 to the Registrant's Report on Form 10-Q for
         the quarter ended December 31, 1993.)

10.25(a) Amendment No. 1 to Loan Agreement, dated as of December 31, 1994, among
         the Registrant, Alkermes Investments, Inc. and The Daiwa Bank, Limited.
         (Incorporated by reference to Exhibit 10.21(a) to the Registrant's
         report on Form 10-K for the fiscal year ended March 31, 1996.)

10.25(b) Amendment to Loan Agreement, dated as of December 29, 1995, by and
         among Registrant, Alkermes Investments, Inc. and The Daiwa Bank,
         Limited (Incorporated by reference to Exhibit 10.3 to the Registrant's
         Report on Form 10-Q for the quarter ended December 31, 1995.)

10.25(c) Omnibus Amendment to Loan Documents, dated as of July 26, 1996, among
         the Registrant, Alkermes Investments, Inc. and The Sumitomo Bank,
         Limited (as assignee of The Daiwa Bank, Limited). (Incorporated by
         reference to Exhibit 10.4 to the Registrant's Report on Form 10-Q for
         the quarter ended December 31, 1996.)

10.26    Second Amended and Restated Note, dated July 26, 1996, by Registrant
         and Alkermes Investments, Inc. to The Sumitomo Bank, Limited.
         (Incorporated by reference to Exhibit 10.5 to the Registrant's Report
         on Form 10-Q for the quarter ended December 31, 1996.)

10.27    Letter Agreement, dated September 27, 1996, by and among Fleet National
         Bank, Alkermes Controlled Therapeutics, Inc., Alkermes Controlled
         Therapeutic Inc. II and the Registrant. (Incorporated by reference to
         Exhibit 10.3 to the Registrant's Report on Form 10-Q for the quarter
         ended September 30, 1996.)##

10.27(a) Loan Supplement and Modification Agreement, dated as of June 2, 1997,
         by and among Fleet National Bank, Alkermes Controlled Therapeutics,
         Inc., Alkermes Controlled Therapeutics Inc. II and the Registrant.

10.28    Security Agreement, dated as of September 27, 1996, from the
         Registrant, Alkermes Controlled Therapeutics, Inc. and Alkermes
         Controlled Therapeutic Inc. II to Fleet National Bank. (Incorporated by
         reference to Exhibit 10.4 to the Registrant's Report on Form 10-Q for
         the quarter ended September 30, 1996.)

10.29    Pledge Agreement, dated as of September 27, 1996, from the Registrant
         to Fleet National Bank. (Incorporated by reference to Exhibit 10.5 to
         the Registrant's Report on Form 10-Q for the quarter ended September
         30, 1996.)

10.30    Mortgage and Security Agreement, dated as of September 27, 1996, from
         Alkermes Controlled Therapeutics Inc. II to Fleet National Bank.
         (Incorporated by reference to Exhibit 10.6 to the Registrant's Report
         on Form 10-Q for the quarter ended September 30, 1996.)

10.31    Environmental Indemnity Agreement, dated as of September 27, 1996, from
         the Registrant and Alkermes Controlled Therapeutics Inc. II to Fleet
         National Bank. (Incorporated by


<PAGE>   65


         reference to Exhibit 10.7 to the Registrant's Report on Form 10-Q for
         the quarter ended September 30, 1996.)

10.32    Promissory Note of the Registrant, dated December 23, 1994, to Fleet
         Bank of Massachusetts, N.A. (Incorporated by reference to Exhibit 10.20
         to the Registrant's Report on Form 10-Q for the quarter ended December
         31, 1994.)

10.32(a) Allonge to Promissory Note, dated as of September 27, 1996, executed by
         Fleet National Bank, Alkermes Controlled Therapeutics, Inc. and the
         Registrant. (Incorporated by reference to Exhibit 10.1 to the
         Registrant's Report on Form 10-Q for the quarter ended September 30,
         1996.)

10.33    Promissory Note, dated December 19, 1995, by Registrant to Fleet Bank
         of Massachusetts, N.A. (Incorporated by reference to Exhibit 10.2 to
         the Registrant's Report on From 10-Q for the quarter ended December 31,
         1995.)

10.33(a) Allonge to Promissory Note, dated as of September 27, 1996, executed by
         Fleet National Bank, Alkermes Controlled Therapeutics, Inc. and the
         Registrant. (Incorporated by reference to Exhibit 10.2 to the
         Registrant's Report on Form 10-Q for the quarter ended September 30,
         1996.)

10.34    Promissory Note, dated September 27, 1996, from the Registrant and
         Alkermes Controlled Therapeutics Inc. II to Fleet National Bank.
         (Incorporated by reference to Exhibit 10.8 to the Registrant's Report
         on Form 10-Q for the quarter ended September 30, 1996.)

10.35    Promissory Note, dated June 2, 1997, from the Registrant, Alkermes
         Controlled Therapeutics, Inc. and Alkermes Controlled Therapeutics Inc.
         II to Fleet National Bank.

10.36    Employment Agreement, entered into as of February 7, 1991, between
         Richard F. Pops and the Registrant. (Incorporated by reference to
         Exhibit 10.12 to the Registrant's Registration Statement on Form S-1,
         as amended (File No. 33-40250).)+

10.37    Employment Agreement, entered into as of June 13, 1994, by and between
         Robert A. Breyer and the Registrant. (Incorporated by reference to
         Exhibit 10.28 to the Registrant's Report on Form 10-K for the fiscal
         year ended March 31, 1994.)+

11       Statement re: computation of per share earnings.

21       Subsidiaries of the Registrant.

22       Proxy Statement dated June 27, 1997.

23       Consent of Deloitte & Touche LLP.

27       Financial Data Schedule.


<PAGE>   66


*        Confidential status has been granted for certain provisions thereof
         pursuant to a Commission Order granted January 8, 1993. Such provisions
         have been filed separately with the Commission.

**       Confidential status has been granted for certain portions thereof
         pursuant to a Commission Order granted September 19, 1995. Such
         provisions have been filed separately with the Commission.

***      Confidential status has been granted for certain portions thereof
         pursuant to a Commission Order granted April 25, 1997. Such provisions
         have been filed separately with the Commission.

****     Confidential status has been granted for certain portions thereof
         pursuant to a Commission Order granted March 24, 1995. Such provisions
         have been filed separately with the Commission.

#        Confidential status has been granted for certain portions thereof
         pursuant to a Commission Order granted September 3, 1996. Such
         provisions have been filed separately with the Commission.

##       Confidential status has been granted for certain portions thereof
         pursuant to a Commission Order granted April 17, 1997. Such provisions
         have been filed separately with the Commission.

+        Constitutes a management contract or compensatory plan required to be
         filed as an Exhibit to this Report pursuant to Item 14(c) of Form 10-K.



<PAGE>   1
                                                                   EXHIBIT 10.2


                                 ALKERMES, INC.

               AMENDED AND RESTATED 1990 OMNIBUS STOCK OPTION PLAN

                   (ADOPTED ON SEPTEMBER 19, 1990, AS AMENDED
                             THROUGH JUNE 11, 1997)



1.   OBJECTIVES

          The objectives of this Plan are to assist Alkermes, Inc. (the
"Company") in attracting and retaining employees, officers and directors of and
consultants to the Company and in promoting the identification of such persons'
interests with those of the Company's shareholders.

2.   DEFINITIONS

          "Board" shall mean the Board of Directors of the Company.

          "Code" shall mean the Internal Revenue Code of 1986, as amended, and
any successor statute or codification of the income tax laws of the United
States.

          "Committee" shall mean the Stock Option Committee of the Board of
Directors, which shall consist of at least two directors, each of whom is a
disinterested person within the meaning of Rule 16b-3(c)(2)(i) under the
Exchange Act.

          "Common Stock" shall mean the Company's Common Stock, par value $.01
per share.

          "Date of Grant" in relation to any option granted under this Plan
shall mean the date on which, or the future date as of which, the Board or the
Committee grants that option.

          "Eligible Person" shall mean any employee, consultant, officer or
director of the Company or any Parent or Subsidiary. For the purposes of
Incentive Stock Options, Eligible Persons must meet all the requirements under
Section 422 of the Code.

          "Exchange Act" shall mean the Securities Exchange Act of 1934, as
amended from time to time.

          "Exercise" in respect of an option shall mean the delivery by the
Optionee to the Company of (a) written notice of exercise of the option as to a
specified number of Shares; (b) payment of the option exercise price for such
Shares; and (c) any other statement or evidence required pursuant to Section 9
hereof.

          "Fair Market Value" of a Share with respect to any day shall mean (i)
the average of the high and low price on such day for a share of Common Stock as
reported on the principal securities


<PAGE>   2

exchange on which shares of Common Stock are then listed or as quoted on the
NASDAQ National Market System, (ii) if not so listed or quoted, the average of
the closing bid and asked prices on such day as reported on NASDAQ, and (iii) if
not so listed, quoted or reported, the value as determined in good faith by the
Board or the Committee, as the case may be.

          "Incentive Stock Option" shall mean any option that, at the time of
grant, meets the requirements of Section 422 of the Code and is identified as an
incentive stock option.

          "ISO Plans" shall mean the Plan and all other incentive stock option
plans under Section 422 of the Code adopted or assumed by corporations that are
Qualified Employers.

          "NASDAQ" shall mean the National Association of Securities Dealers
Automated Quotation System.

          "Non-Qualified Stock Option" shall mean any option granted under the
Plan other than an Incentive Stock Option.

          "Non-Section 16 Eligible Person" shall mean an Eligible Person who is
not an Officer or a director of the Company.

          "Officer" shall mean a person who has been designated by the Board as
an officer of the Company within the meaning of Rule 16a-1(f) of the Exchange
Act.

          "Optionee" shall mean a person holding an option granted under this
Plan which has not been exercised or surrendered and has not expired.

          "Parent" shall mean a corporation which, at the time in question, owns
at least 50% of the total combined voting power of all classes of outstanding
stock of the Company (or of a corporation that has issued or assumed a stock
option of the Company in a transaction to which Section 424(a) of the Code
applies) and a corporation which, at such time, owns at least 50% of the total
combined voting power of all classes of stock in another Parent.

          "Plan" means this Amended and Restated 1990 Omnibus Stock Option Plan,
as amended from time to time.

          "Qualified Employer" shall mean the Company, any Parent or any
Subsidiary.

          "Section 16 Eligible Person" shall mean an Eligible Person who is an
Officer or a director of the Company.

          "Shares" shall mean shares of Common Stock of the Company for which
options may be granted hereunder.

          "Subsidiary" shall mean a corporation in which, at the time in
question, the Company (or a corporation that issued or assumed a stock option of
the Company in a transaction to which Section 424(a) of the Code applies) owns
at least 50% of the total combined voting power of all classes of stock



                                        2

<PAGE>   3
outstanding and a corporation in which, at such time, another Subsidiary owns at
least 50% of the total combined voting power of all classes of stock
outstanding.

          "Ten Percent Shareholder" shall mean an Eligible Person who owns at
the Date of Grant more than 10% of the total combined voting power of all
classes of stock of a Qualified Employer.

3.   MAXIMUM NUMBER OF SHARES TO BE OPTIONED AND ADJUSTMENTS IN OPTIONED SHARES

          The maximum number of Shares for which options may be granted
hereunder is 1,750,000. This number shall be adjusted if the number of
outstanding shares of Common Stock of the Company is increased or reduced by
split-up, reclassification, stock dividend, or the like. The number of Shares
previously optioned and not theretofore delivered and the option exercise price
per Share shall likewise be adjusted whenever the number of outstanding shares
of Common Stock is increased or reduced by any such procedure. Shares for which
options have expired or have been surrendered may again be optioned pursuant to
the Plan.

4.   ADMINISTRATION AND INTERPRETATION

          Except to the extent provided below, this Plan shall be administered
by the Board. The Board may delegate responsibility for administration to the
Committee. The Board, or such Committee, may make such rules and establish such
procedures as it deems appropriate for the administration of the Plan. In the
event of any disagreement as to the interpretation of the Plan or any rule or
procedure thereunder, the decision of the Board, or such Committee, shall be
final and binding upon all persons in interest. Members of the Board who are
eligible to participate in or have been granted options under the Plan may vote
on matters affecting administration of the Plan; provided, however, that the
Committee shall have the authority and sole responsibility for granting options
to Section 16 Eligible Persons and authorizing the issuance of Shares upon the
exercise thereof, and for the administration of the Plan with respect thereto.

5.   GRANTING OF OPTIONS

          The Board is authorized to grant options to Non-Section 16 Eligible
Persons pursuant to this Plan. The number of Shares, if any, optioned in each
year, the Non-Section 16 Eligible Persons to whom and the time or times at which
options are granted, the number of Shares optioned to each Non-Section 16
Eligible Person and the other terms and provisions of such options shall be
wholly within the discretion of the Board, subject to the limitation that no
option shall be granted (notwithstanding any other provisions of this Plan to
the contrary) later than September 19, 2000.

          The Committee is authorized to grant options to Section 16 Eligible
Persons pursuant to this Plan. The number of Shares, if any, optioned in each
year, the Section 16 Eligible Persons to whom and the time or times at which
options are granted, the number of Shares optioned to each Section 16 Eligible
Person and the other terms and provisions of such options shall be wholly within
the discretion of the Committee, subject to the limitation that no option shall
be granted (notwithstanding any other provisions of this Plan to the contrary)
later than September 19, 2000.


                                        3

<PAGE>   4

6.   TYPE OF OPTIONS

          This Plan permits the grant of Non-Qualified Stock Options, as well as
Incentive Stock Options. Options granted under the Plan will be designated as
Non-Qualified Stock Options or Incentive Stock Options at the time of their
grant.

7.   OPTION TERMS

          Subject to the limitation prescribed in Section 5 above, the options
granted under this Plan shall be on the terms stated in clauses (a) through (h)
below. The Board or the Committee, as the case may be, may specify additional
terms not inconsistent with this Plan by rules of general application or by
specific direction in connection with a particular option or group of options.

          (a) The option exercise price shall be fixed by the Board or the
Committee, as the case may be, but shall not be less than 100% (110% in the case
of an Incentive Stock Option granted to a Ten Percent Shareholder) of the Fair
Market Value of the underlying Shares on the Date of Grant.

          (b) The option exercise price shall be payable in cash, property,
services rendered or, under certain circumstances, in shares of Common Stock of
the Company having a Fair Market Value equal to the option exercise price on the
date of exercise, or any combination thereof, or any other means which the Board
or the Committee, as the case may be, determines are consistent with the Plan's
purpose and applicable laws.

          (c) The option shall not be transferable otherwise than by will or the
laws of descent and distribution and shall be exercisable during the Optionee's
lifetime only by the Optionee or after his death by the person or persons
entitled thereto by will or the laws of descent and distribution.

          (d) The term of the option shall be fixed by the Board or the
Committee, as the case may be, but no option shall be granted for a term to
exceed ten years or, in the case of an Incentive Stock Option being granted to a
Ten Percent Shareholder, for a term to exceed five years.

          (e) The option shall terminate and may not be exercised if the
Optionee ceases for any reason (including death, retirement or disability) to be
an employee of the Qualified Employer, except to the extent provided in Section
9 hereof.

          (f) In the event that the Company is succeeded by another company in a
reorganization, merger, consolidation, acquisition of property or stock,
separation or liquidation, the successor company shall assume the outstanding
options granted under this Plan or shall substitute new options for them, which
shall provide that the Optionee, at the same cost, shall be entitled upon the
exercise of such option to receive such securities of the surviving or resulting
corporation as the Board of Directors of such corporation shall determine to be
equivalent, as nearly as practicable, to the nearest whole number and class of
shares of stock or other securities to which the Optionee would have been
entitled under the terms of the agreement governing the reorganization, merger,
consolidation, acquisition of property or stock, separation or liquidation as
if, immediately prior to such event, the Optionee had been the holder of record
of the number of Shares which were then subject to such option.


                                        4

<PAGE>   5

          (g) The aggregate Fair Market Value (determined as of the Date of
Grant) of the Shares for which Incentive Stock Options are granted under the ISO
Plans to any one Eligible Person that are exercisable for the first time during
any calendar year shall not exceed $100,000.

          (h) The terms and conditions of the grant of each option granted
hereunder shall be embodied in a written award certificate in a form prescribed
by the Board or by the Committee, as the case may be, which (i) has been
completed with the date, name of Optionee, number of Shares to which it relates,
type of option, term of option, option price per Share, name of Optionee's
employing company and (with respect to Incentive Stock Options) the conditions
required to qualify as an incentive stock option under Section 422 of the Code,
(ii) has been signed by a member of the Board or the Committee or an officer of
the Company designated by the Board or by the Committee, as the case may be, and
(iii) has been delivered to the Optionee.

8.   LIMITED STOCK APPRECIATION RIGHTS

          (a) The Committee is authorized, in its discretion, to grant limited
stock appreciation rights ("LSARs") with respect to all or any portion of the
Shares covered by stock options granted hereunder to Officers and directors of
the Company, simultaneously with the grant of, or at any time during the term
of, non-qualified options or simultaneously with the grant of incentive stock
options. The grant of the LSAR will not be effective until six months after the
date of its grant. Those options with respect to which an LSAR has been granted
and become effective shall become immediately exercisable upon the occurrence of
any of the following events (each, a "Triggering Event"): (i) the consummation
by the Company of a reorganization, merger, or consolidation after approval of
any such transaction by shareholders, other than Section 16 Eligible Persons,
holding at least the minimum number of shares necessary to approve such
transaction under the Company's Articles of Incorporation and applicable law,
(ii) the consummation by the Company of a sale of substantially all its assets
after approval of any such transaction by shareholders, other than Section 16
Eligible Persons, holding at least the minimum number of shares necessary to
approve such transaction under the Company's Articles of Incorporation and
applicable law, or (iii) the acquisition by a single purchaser or group of
related purchasers of in excess of 51% of the issued and outstanding shares of
Common Stock from shareholders of the Company other than Section 16 Eligible
Persons, in any case other than in a transaction in which the surviving
corporation or the purchaser is the Company or a Subsidiary of the Company
(other than a transaction in which the surviving corporation or the purchaser is
the Company or a Subsidiary of the Company but the capital stock of the Company
or a Subsidiary of the Company is converted into capital stock of any entity
other than the Company or any such Subsidiary) or an entity controlled by
Section 16 Eligible Persons.

          (b) The LSARs shall provide that upon the occurrence of any Triggering
Event, the Optionee shall receive from the Company, for each LSAR, an amount in
cash equal to the amount by which the option exercise price per Share of the
option to which the LSAR relates is exceeded by the Fair Market Value of the
Shares issuable upon exercise of such option on the date such Triggering Event
occurs. When a Triggering Event occurs, the option to which the LSAR relates
will cease to be exercisable, but will be deemed to have been exercised for
purposes of determining the number of Shares for which options may be granted
hereunder.

          (c) An LSAR shall be expressly subject to the following additional
requirements: (i) the LSAR shall expire no later than the expiration of the
underlying option; (ii) the LSAR shall be

                                        5

<PAGE>   6

transferable only when the underlying option is transferable, and under the same
conditions; and (iii) a Triggering Event shall be deemed to have occurred only
when the Fair Market Value of the Shares subject to the underlying option
exceeds the exercise price of such option.

9.   EXERCISE RIGHTS UPON CEASING TO BE AN EMPLOYEE, OFFICER, CONSULTANT OR
     DIRECTOR

          (a) If an Optionee becomes permanently and totally disabled, he may
exercise his option for up to one year after the date he ceases to be an
employee, officer or director of or a consultant to a Qualified Employer on
account of such disability, but in no event later than the date on which the
option would have expired if the Optionee had not become disabled. During such
period, the option may be exercised only to the extent that the Optionee was
entitled to do so at the date of disability and, to the extent the option is not
so exercised, it shall expire at the end of such period. For purposes of this
Section 9(a), an Optionee shall be deemed to be disabled if, in the
determination of the Board or the Committee, as the case may be, he is unable to
engage in any substantial gainful activity by reason of any medically
determinable physical or mental impairment which can be expected to result in
death or which has lasted or can be expected to last for a continuous period of
not less than 12 months.

          (b) If an Optionee dies during a period in which he is entitled to
exercise an option (including the period referred to in subsection (a) above),
the option shall terminate one year after the date of death, but in no event
later than the date on which the option would have expired if the Optionee had
lived. During such period, the option may be exercised by the Optionee's
executor or administrator or by any person or persons who shall have acquired
the option directly from the Optionee by bequest or inheritance or by reason of
the death of the Optionee, but only to the extent that the Optionee was entitled
to do so at the date of death and, to the extent the option is not so exercised,
it shall expire at the end of such period.

          (c) If an Optionee ceases to be an employee, officer or director of or
consultant to any and all Qualified Employers in circumstances other than those
described in subsections (a) or (b) above, he may exercise options granted
hereunder for a period not to exceed three months after the date of such
cessation, but in no event later than the date on which the option would have
expired if the Optionee had remained an employee, officer or director of or
consultant to a Qualified Employer. During such period, the option may be
exercised only to the extent that the Optionee was entitled to do so on the date
of cessation and, to the extent the option is not so exercised, it shall expire
at the end of such three-month period. This provision shall not apply if the
Optionee's employment or consultant relationship was terminated for "cause," or
if the officer or director was removed for "cause," which shall include theft,
falsification of records, fraud, embezzlement, gross negligence or willful
misconduct, causing a Qualified Employer to violate any federal, state, or local
law, or administrative regulation or ruling having the force and effect of law,
insubordination, conflict of interest, diversion of corporate opportunity, or
conduct that results in publicity that reflects unfavorably on a Qualified
Employer.

          (d) For purposes of this section an Optionee who is an employee shall
not be treated as having ceased employment if (1) the Optionee is on military,
sick leave or other bona fide leave of absence (such as temporary employment by
the United States Government); and (2) the period of such leave does not exceed
90 days, or, if longer, so long as the Optionee's right to reemployment with a
Qualified Employer is guaranteed by statute or by contract. Where the period of
leave exceeds 90 days and the Optionee's right to reemployment is not guaranteed
by statute or by contract, such Optionee shall be deemed to have ceased being an
employee on the 91st day of such leave.

                                        6

<PAGE>   7

10.  ADDITIONAL REQUIREMENTS

          Upon the exercise of an option granted hereunder the Board or the
Committee, as the case may be, may require the Optionee to deliver the
following:

          (a) A written statement satisfactory to the Company or its counsel
that the Optionee is purchasing the Shares for investment and not with a view
toward their distribution or sale and will not sell or transfer any Shares
received upon the exercise of the option except in accordance with the
Securities Act of 1933 and applicable state securities laws; and

          (b) Evidence reasonably satisfactory to the Company that at the time
of exercise the Optionee meets such other requirements as the Board or the
Committee, as the case may be, may determine.

11.  SHARES SUBJECT TO OPTION

          The Shares issuable upon exercise of options granted hereunder may be
unissued shares or treasury shares, including shares bought on the open market.
The Company at all times during the term of this Plan shall reserve for issuance
the number of Shares issuable upon exercise of options granted hereunder.

12.  COMPLIANCE WITH GOVERNMENTAL AND OTHER REGULATIONS

          The Company will not be obligated to issue and sell the Shares issued
pursuant to options granted hereunder if, in the opinion of its counsel, such
issuance and sale would violate any applicable federal or state securities laws.
The Company will seek to obtain from each regulatory commission or agency having
jurisdiction such authority as may be required to issue and sell Shares issuable
upon exercise of any option granted hereunder. Inability of the Company to
obtain from any such regulatory commission or agency authority which counsel for
the Company deems necessary for the lawful issuance and sale of Shares upon
exercise of an option granted hereunder shall relieve the Company from any
liability for failure to issue and sell such Shares until the time when such
authority is obtained or is obtainable.

13.  NONASSIGNMENT OF OPTIONS

          Except as otherwise provided in Paragraph 7(c) hereof, any option
granted hereunder and the rights and privileges conferred hereby shall not be
transferred, assigned, pledged or hypothecated in any way (whether by operation
of law otherwise) and shall not be subject to execution, attachment, or similar
process. Upon any attempt to transfer, assign, pledge, hypothecate, or otherwise
dispose of such option, right or privilege contrary to the provisions hereof, or
upon the levy or any attachment or similar process upon the rights and
privileges conferred hereby, such option and the rights and privileges conferred
hereby shall immediately terminate.


                                        7

<PAGE>   8

14.  RIGHTS OF OPTIONEE IN SHARES

          Neither any Optionee nor the legal representatives, heirs, legatees,
or distributees of any Optionee, shall be deemed to be the holder of, or to have
any rights of a holder with respect to, any Shares issuable upon exercise of an
option granted hereunder unless and until such Shares are issued to him or them.

15.  DELIVERY OF SHARES ISSUED PURSUANT TO OPTION

          Subject to the other terms and conditions of this Plan, upon the
exercise of an option granted hereunder, the Company shall sell to the Optionee
the Shares with respect to which the option has been exercised.

16.  WITHHOLDING OF APPLICABLE TAXES

          A Qualified Employer shall have the right to reduce the number of
Shares otherwise required to be issued upon exercise of an option granted
hereunder by an amount which would have a Fair Market Value on the date of such
exercise equal to all Federal, state, city, or other taxes as shall be required
to be withheld by the Qualified Employer pursuant to any statute or other
governmental regulation or ruling. In connection with all such withholding
obligations (whether arising in connection with an exercise of an option granted
hereunder or in connection with a disqualifying disposition (as defined in
Section 421(b) of the Code) of stock obtained upon exercise of an Incentive
Stock Option granted hereunder), a Qualified Employer may make any other
arrangements consistent with this Plan as it may deem appropriate, including but
not limited to withholding such taxes from cash compensation payable to the
Optionee and requiring the Optionee to remit cash in an amount equal to the
taxes required to be withheld.

17.  PLAN AND OPTIONS NOT TO AFFECT EMPLOYMENT OR OTHER AFFILIATION

          Neither this Plan nor any options granted hereunder shall confer upon
any Eligible Person any right to continue employment or affiliation with any
Qualified Employer.

18.  AMENDMENT OF PLAN

          The Board may make such amendments to this Plan as it deems necessary
or advisable, provided that, without further action by the shareholders of the
Company, no such amendment shall (a) materially increase the maximum number of
Shares for which options may be granted, except as provided in Section 3, (b)
materially increase the benefits under the Plan, or (c) materially modify the
requirements as to eligibility for participation in the Plan, and in no event
shall any such amendment impair the rights of any participant under any option
theretofore granted.

19.  NOTICES

          Any notice required or permitted hereunder shall be sufficiently given
only if sent by registered or certified mail, postage prepaid, addressed to the
Company, 26 Landsdowne Street, Cambridge, MA 02139 and to the Optionee at the
address on file with the Company at the time of grant

                                        8
<PAGE>   9

hereunder, or to such other address as either party may hereafter designate in
writing by notice similarly given by one party to the other.

20.  SUCCESSORS

          The Plan shall be binding upon and inure to the benefit of any
successor, successors or assigns of the Company.

21.  SEVERABILITY

          If any part of this Plan shall be determined to be invalid or void in
any respect, such determination shall not affect, impair, invalidate, or nullify
the remaining provisions of this Plan which shall continue in full force and
effect.

22.  TERMINATION OF THE PLAN

          The Board may terminate this Plan at any time; otherwise this Plan
shall terminate September 19, 2000. Termination of the Plan shall not deprive
Optionees of their rights under previously granted options.

23.  GRANTS OF OPTIONS AFTER AMENDMENTS TO PLAN

          The grant of any option hereunder on or after the date the Board has
adopted any amendments to the Plan that require shareholder approval pursuant to
Section 18 hereof, is subject to the express condition that within 12 months
after such date, the holders of a majority of the outstanding shares of Common
Stock present, or represented, and entitled to vote thereon shall have approved
the Plan at a duly held meeting of the shareholders of the Company.


                                        9

<PAGE>   1
                                                                  Exhibit 10.8


                                      LEASE

                              DATED: JULY 26, 1993

                BY MASSACHUSETTS INSTITUTE OF TECHNOLOGY, LESSOR

                            TO ALKERMES, INC., LESSEE

                   281 ALBANY STREET, CAMBRIDGE MASSACHUSETTS



<PAGE>   2


                                                                          Page i
                                                                          ------

                                TABLE OF CONTENTS
                                -----------------


1.    Parties and Premises...................................................  1

2.    Expansion..............................................................  1

3.    Lease Term; Commencement Date; Extension Options.......................  3
      3.1      Lease Term; Commencement Date.................................  3
      3.2      Extension Option..............................................  3

4.    Rent; Determination of Fair Market Rent; Preliminary
      Entry; Net Lease.......................................................  4
      4.1      Payment of Rent...............................................  4
      4.2      Determination of Fair Market Rent.............................  5
      4.3      Preliminary Entry.............................................  7
      4.4      Net Lease.....................................................  7

5.    Permitted Use..........................................................  7

6.    Taxes..................................................................  8
      6.1      Taxes.........................................................  8
      6.2      Payment of Taxes..............................................  8
      6.3      Abatement of Taxes............................................  9

7.    Utilities and Services.................................................  9

8.    Insurance.............................................................. 11
      8.1      Public Liability Insurance.................................... 11
      8.2      Casualty Insurance............................................ 11
      8.3      Certificate of Insurance...................................... 12
      8.4      Lessor's Insurance............................................ 12
      8.5      Waiver of Subrogation......................................... 12
      8.6      Waiver of Rights.............................................. 13

9.    Assignment and Subletting.............................................. 13

10.   Parking................................................................ 17

11.   Late Payment of Rent................................................... 17

12.   Lessee's Covenants..................................................... 17

13.   Construction........................................................... 26
      13.1     Work Letter................................................... 26
      13.2     Roof Load Capacity............................................ 26
      13.3     Floor Loads................................................... 27

14.   Eminent Domain and Casualty............................................ 27
      14.1     Substantial Taking............................................ 27
      14.2     Awards........................................................ 27
      14.3     Substantial Casualty.......................................... 28
      14.4     Repair and Restoration........................................ 28
      14.5     Casualty During Last 12 Months................................ 30

                                       (i)

<PAGE>   3


                                                                         Page ii
                                                                         -------

15.   Defaults; Events of Default; Remedies.................................. 30
      15.1     Defaults; Events of Default................................... 30
      15.2     Termination................................................... 31
      15.3     Survival of Covenants......................................... 32
      15.4     Right to Relet................................................ 33
      15.5     Right to Equitable Relief..................................... 33
      15.6     Right to Self Help............................................ 33
      15.7     Further Remedies.............................................. 34

16.   Intentionally Deleted.................................................. 34

17.   Real Estate Broker..................................................... 34

18.   Notices................................................................ 34

19.   No Waivers............................................................. 35

20.   Lessor's Obligations................................................... 35
      20.1     Generally..................................................... 35
      20.2     Lessor's Maintenance.......................................... 36

21.   Ground Leases; Mortgages............................................... 36
      21.1     Rights of Ground Lessors and Mortgagees....................... 36
      21.2     Lease Subordinate............................................. 37

22.   Notice of Lease; Estoppel Certificates................................. 38

23.   Holding Over........................................................... 38

24.   Force Majeure.......................................................... 38

25.   Signs.................................................................. 38

26.   Entire Agreement....................................................... 39

27.   Applicable Law, Severability and Construction.......................... 39

28.   Successors and Assigns................................................. 40

29.   Security Deposit....................................................... 40

30.   Authority.............................................................. 41


EXHIBIT A:  PLAN OF THE PREMISES
EXHIBIT B:  PLAN OF THE LAND
EXHIBIT C:  WORK LETTER
EXHIBIT D:  COMMENCEMENT DATE AGREEMENT


                                      (ii)

<PAGE>   4

                                      LEASE



Dated: July 26, 1993


1.   PARTIES AND PREMISES. MASSACHUSETTS INSTITUTE OF TECHNOLOGY ("Lessor")
     hereby LEASES unto ALKERMES, INC. ("Lessee"), the following premises:

          25,500 square feet of rentable area on the first floor (shown as the
          hatched area on EXHIBIT A attached hereto) (the "Premises"), of the
          building known as and numbered 281 Albany Street, Cambridge,
          Massachusetts (the "Building"), which Building contains 32,000
          rentable square feet and is located on the parcel of land (the "Land")
          identified as Assessors Plan #67, Lots 32 and 33 as shown on the plan
          attached hereto as EXHIBIT B attached hereto,

     together with the benefit of, and subject to (as the case may be) all
     rights, easements, covenants, conditions, encumbrances, encroachments and
     restrictions of record as of the date of this Lease. Lessor shall have the
     right, without the necessity of obtaining Lessee's consent thereto or
     joinder therein, to grant, permit, or enter into during the term of this
     Lease such additional rights, easements, covenants, conditions,
     encumbrances, encroachments and restrictions with respect to the Land as
     Lessor may deem appropriate, PROVIDED THAT no such rights, easements,
     covenants, conditions, encumbrances, encroachments or restrictions shall
     materially affect Lessee's use of the Premises for the Permitted Uses
     hereunder.

     Lessor hereby grants to Lessee, as appurtenant to the Premises, the right
     in common with Lessor and others to whom Lessor may have previously or may
     hereafter grant rights, to enter into the basement of the Building for the
     purpose of (i) installing an acid neutralization tank as part of "Lessee's
     Work" (as defined in the Work Letter) and maintaining, repairing, replacing
     and removing the same, and (ii) installing as part of Lessee's Work
     additional equipment intended to service the Premises and maintaining,
     repairing, replacing and removing the same, PROVIDED that such rights shall
     be exercised so as not to interfere with any Building system serving the
     second floor of the Building (whether solely or together with the first
     floor thereof).

2.   EXPANSION. Subject to the provisions of this Section, Lessee shall have the
     option (the "Expansion Option") to subject the second floor of the
     Building, containing

<PAGE>   5

     approximately 6,500 rentable square feet (the "Expansion Premises"), to all
     of the terms of this Lease (except for Basic Rent, which shall be
     calculated in the manner provided below).

     Lessee acknowledges that the Expansion Premises are currently occupied by
     another lessee ("Current Occupant") whose lease expires on or about
     December 31, 1994. Provided that both (i) an "Event of Default" (as
     hereinafter defined) has not occurred and is not then continuing as of the
     day on which Lessee purports to exercise the option herein granted, and
     (ii) as of such date the Lessee named herein is actually occupying at least
     twenty-five (25%) percent of the Premises, Lessee shall have the right to
     lease the Expansion Premises for a term commencing on the date on which
     Lessor delivers possession thereof to Lessee, and ending on the last day of
     the "Lease Term" (as hereinafter defined), by giving written notice of
     exercise to Lessor not later than July 1, 1994.

     If Lessee exercises its right under this Section to lease the Expansion
     Premises, then such space shall become subject to all of the terms of this
     Lease EXCEPT that "Basic Rent" for such space shall be in an amount equal
     to the "Fair Market Value" thereof (as these terms are hereinafter
     defined). In the event that Lessee, for any reason whatsoever, fails or
     refuses to give such notice by July 1, 1994, Lessee shall be deemed to have
     waived its rights under this Section with respect to the Expansion Premises
     for the remainder of the Lease Term.

     If Lessee exercises the Expansion Option, then Lessor shall deliver the
     Expansion Premises vacant and broom clean but otherwise in its "as is"
     condition. Lessor shall use due diligence to deliver the Expansion Premises
     to Lessee as soon as practicable, Effective upon the date on which Lessor
     delivers to Lessee possession of the Expansion Premises, such space shall
     be deemed to be part of the Premises for all purposes of this Lease, Lessee
     shall commence paying Basic Rent and "Additional Rent" on account thereof,
     and "Lessee's Share" (as these terms are hereinafter defined) shall be
     appropriately modified.

     Notwithstanding the foregoing provisions of this Section 2.0, in the event
     that Lessor learns that the Expansion Premises will become vacant prior to
     January 1, 1995, Lessor shall so notify Lessee. Provided that both (i) an
     "Event of Default" (as hereinafter defined) has not occurred and is not
     then continuing as of the day on which Lessee purports to exercise the
     right herein granted, and (ii) as of such date the Lessee named herein is
     actually occupying at least

                                        2


<PAGE>   6

     twenty-five (25%) percent of the Premises, Lessee shall have the right to
     accelerate the exercise of the Expansion Option by giving written notice of
     exercise to Lessor within twenty (20) days of receipt of Lessor's notice.
     If Lessee exercises its right to accelerate the Expansion Option, then such
     space shall become subject to all of the terms of this Lease as provided
     hereinabove in this Section as of the date on which Lessor delivers
     possession thereof to Lessee. If Lessee declines to accelerate the exercise
     of the Expansion Option, then Lessee shall be deemed to have waived all
     rights to exercise the Expansion Option at any time under this Section 2.0.

3.   Lease Term; Commencement Date; Extension Options.
     ------------------------------------------------

     3.1  LEASE TERM; COMMENCEMENT DATE. The initial term of this Lease (the
          "Initial Lease Term") shall commence on the date (the "Commencement
          Date") which is the first to occur of (i) the first day on which
          Lessee occupies any portion of the Premises for the conduct of its
          business operations, or (ii) August 15, 1993, and shall expire, unless
          sooner terminated as hereinafter provided, on the day immediately
          preceding the fifth (5th) anniversary of the Commencement Date. As
          used in this Lease, "Lease Term" means the Initial Lease Term, as the
          same may be extended pursuant to Section 3.2 below. On request of
          either party, Lessor and Lessee shall execute and deliver a
          Commencement Date Agreement in the form attached hereto as EXHIBIT D
          setting forth the Commencement Date.

     3.2  EXTENSION OPTION. Provided that both (i) an "Event of Default" (as
          hereinafter defined) has not occurred and is not then continuing as of
          either the day on which Lessee purports to give Lessor a "Lessee's
          Notice of Exercise" (as hereinafter defined) or on the first day of
          the "Extension Term" (as hereinafter defined), and (ii) the Lessee
          named herein is actually occupying at least twenty-five (25%) percent
          of the Premises as of each of said dates, Lessee shall have one (1)
          option ("Extension Option"), to extend the Lease Term of this Lease
          for a period of five (5) years ("Extension Term"), unless sooner
          terminated as hereinafter provided, subject to all the terms of this
          Lease except for the change in Basic Rent as provided in Section 4.2
          of this Lease.

          Lessee shall exercise the Extension Option, if at all, by giving
          written notice of Lessee's exercise thereof ("Lessee's Notice of
          Exercise") to Lessor not earlier than fifteen (18) months prior to,
          nor later than nine

                                        3

<PAGE>   7
          (9) months prior to, the last day of the Initial Lease Term as the
          case may be. If Lessee fails to give such Lessee's Notice of Exercise
          within such time, Lessee shall be deemed to have waived the right to
          exercise the Extension Option. The dates described in this paragraph
          are summarized in the following table:

                   Notification Dates                    Extension Term
          Not Before:                Not After:        Begins:       Ends:
          -----------                ----------        -------       -----

          5/15/1997                  11/14/1997       8/15/1998    8/14/2003

          Basic Rent shall be due and payable in the manner hereinafter provided
          in Section 4.1 below.

4.   Rent; Determination of Fair Market Rent; Preliminary Entry; Net Lease
     ---------------------------------------------------------------------

     4.1  PAYMENT OF RENT. From and after the Commencement Date, Lessee shall
          pay Lessor, without offset or deduction and without previous demand
          therefor, as items constituting rent (collectively, "Rent"):

          (a)  Basic rent ("Basic Rent") at the following rates:

               (i)  for each of the first five (5) Lease Years, $4.00 per
                    rentable square foot of the Premises ($102,000.00 per year;
                    $8,500.00 per month); and

               (ii) for each Lease Year in the Extension Term, $6.00 per
                    rentable square foot of the Premises $153,000.00 per year;
                    $12,750.00 per month).

               Basic Rent as set forth above does not include, and is in
               addition to, any Basic Rent which may become due and payable with
               respect to the Expansion Premises, calculated in the manner
               provided in Section 4.2 below. Basic Rent shall be due and
               payable in equal monthly installments, in advance, commencing on
               the Commencement Date, and continuing thereafter on the first day
               of each calendar month or portion thereof during the Lease Term.
               Basic Rent shall be PRO-RATED for partial months occurring at the
               beginning or the end of the Lease Term; and

          (b)  All other costs, charges, or expenses which Lessee in this Lease
               agrees to pay, or which Lessor pays or incurs as the result of a
               default by Lessee

                                        4





<PAGE>   8

               hereunder, including any penalty or interest which may be added
               for nonpayment or late payment thereof as provided in this Lease
               (collectively, "Additional Rent").

          As used in this Lease, "Lease Year" means the twelve (12) month period
          commencing on the Commencement Date, and each successive twelve (12)
          month period included in the Lease Term commencing on an anniversary
          of that day, but if the expiration of the Lease Term or the earlier
          termination of the Lease does not coincide with the termination of
          such a twelve (12) month period, the term "Lease Year" shall mean the
          portion of such twelve (12) month period before such expiration or
          termination.

          All payments shall be made to Lessor or such agent, and at such place,
          as Lessor shall, from time to time, in writing designate, the
          following being now so designated:

                              Meredith & Grew, Inc.
                               160 Federal Street
                              Boston, MA 02110-1701
                            Attention: Kristin Blount

     4.2  DETERMINATION OF FAIR MARKET RENT. As used in this Lease, "Fair Market
          Rent" means the fair market rent for the portion of the Building with
          respect to which "Fair Market Rent" is being determined in its "as is"
          condition, excluding the value of the improvements completed by Lessee
          therein but including the value of improvements made by Lessor, as of
          the day with respect to which such determination is being made. Fair
          Market Rent shall be based upon the rents generally in effect for
          similar premises for first-class research and development/
          manufacturing/ office uses in similar buildings in the Cambridge,
          Massachusetts area in which the Premises is located, adjusted to a
          "net" lease basis, taking into account all facts and circumstances
          customarily taken into account by prudent and commercially reasonable
          lessors and lessees (including, without limitation, concessions
          typically offered in such market to renewing tenants).

          Within twenty (20) days after Lessor receives Lessee's notice of
          exercise of the Expansion Option), Lessor shall provide to Lessee
          Lessor's good faith determination of the Fair Market Rent of the
          Expansion Premises. If Lessor and Lessee are unable to agree on such
          Fair Market Rent within twenty (20) days

                                        5


<PAGE>   9

          thereafter, then Lessor and Lessee shall, not later than sixty (60)
          days after Lessor receives Lessee's notice, each retain a real estate
          appraiser with at least ten (10) years' continuous experience in the
          business of appraising or marketing commercial real estate in the
          Cambridge, Massachusetts vicinity, who shall, within thirty (30) days
          of his or her selection, prepare a written report summarizing his or
          her conclusion as to Fair Market Rent. Lessor and Lessee shall
          simultaneously exchange such reports; PROVIDED, HOWEVER, that if one
          party has not obtained such a report within one hundred (100) days
          after Lessor receives Lessee's notice of exercise, then the
          determination set forth in the other party's report shall be final and
          binding upon the parties. If both parties receive reports within such
          time and the lesser of the two determinations is within ten (10%)
          percent of the higher determination, then the average of these
          determinations shall be deemed to be Fair Market Rent. If these
          determinations differ by more than ten (10%) percent, then Lessor and
          Lessee shall mutually select a person with the qualifications stated
          above (the "Final Appraiser") to resolve the dispute as to Fair Market
          Rent. If Lessor and Lessee cannot agree upon the designation of the
          Final Appraiser within thirty (30) days of the exchange of the first
          appraisal reports, either party may apply to the American Arbitration
          Association, the Greater Boston Real Estate Board, or any successor
          thereto for the designation of a Final Appraiser. Within ten (10) days
          of the selection of the Final Appraiser, Lessor and Lessee shall each
          submit to the Final Appraiser a copy of their respective appraiser's
          determination of Fair Market Rent. The Final Appraiser shall not
          perform his own appraisal but rather shall, within thirty (30) days
          after such submissions, select the submission which is closest to the
          determination of Fair Market Rent which the Final Appraiser would have
          made acting alone. The Final Appraiser shall give notice of his
          selection to Lessor and Lessee and such decision shall be final and
          binding upon Lessor and Lessee. Each party shall pay the fees and
          expenses of its appraiser and counsel, if any, in connection with any
          proceeding under this paragraph, and the parties shall each pay
          one-half of the fees and expenses of the Final Appraiser.

          In the event that Fair Market Rent has not been finally determined in
          the manner provided above with respect to the Expansion Premises as of
          the day on which Basic Rent commences to be due and payable on account
          of such space, then Basic Rent shall be due and payable at the

                                        6

<PAGE>   10

          rate provided by the Lessor, and Lessor and Lessee shall make such
          adjustment (and payment or credit as necessary) within thirty (30)
          days after Fair Market Rent is finally determined.

     4.3  PRELIMINARY ENTRY. Provided that an "Event of Default" (as hereinafter
          defined) has not occurred hereunder, Lessee shall have the right to
          enter upon the Premises prior to the Commencement Date to perform
          "Lessee's Work" (as defined in the Work Letter). Such entry shall be
          subject to the full and punctual performance by Lessee of all of
          Lessee's covenants hereunder with respect to the Premises from and
          after the date upon which Lessee first makes such entry except that
          Lessee shall not be required to pay any Rent. If during this time
          Lessee takes occupancy of any portion of the Premises and conducts it
          business operations therein, then the first date of such occupancy
          shall be deemed to be the Commencement Date as provided in Section 3.2
          above. The period of such preliminary entry for the purposes of
          performing Lessee's Work shall in all events end no later than the
          Commencement Date.

     4.4  NET LEASE. It is the intention of the Lessor and the Lessee that this
          is a "net" lease and that the Rent herein specified shall be paid to
          the Lessor in each month during the Lease Term, and that all costs,
          expenses, and obligations of every kind relating to the Premises
          whether usual or unusual, ordinary or extraordinary, foreseen or
          unforeseen, which may arise or become due during the Lease Term, shall
          be paid by Lessee except as otherwise specifically provided herein.

5.   PERMITTED USE. The Premises shall be occupied by Lessee and used for the
     following purposes (the "Permitted Uses") only and for no other:

          office, research and development, laboratory, manufacturing and
          distribution office uses, and ancillary uses thereto; in each case to
          the extent permitted as a matter of right under the Zoning Ordinance
          of the City of Cambridge, as amended from time to time.

     Notwithstanding anything herein contained to the contrary, provided that
     Lessee is not in default hereunder beyond the cure period provided in this
     Lease, Lessee may discontinue its occupancy of the Premises or any part
     thereof for any period of time during the Lease Term, provided that during
     any such period, Lessee shall be bound by all of the

                                        7

<PAGE>   11

     obligations of Lessee under this Lease, including without limitation, the
     obligation to pay Rent. If Lessee discontinues actual occupancy of the
     entire portion of the Premises not then subleased pursuant to this Lease
     (if any), and such discontinuance lasts for more than six (6) consecutive
     months, Lessor shall have the right, in its sole discretion, to terminate
     this Lease as to the entire portion of the Premises not so subleased (if
     any) upon thirty (30) days' written notice to Lessee and payment to Lessee
     of the "Termination Payment" (as defined in the next sentence), in which
     event the Lease shall terminate as to that portion of the Premises as if
     the date specified in such termination notice was the last day of the Lease
     Term. As used in this Lease, the term "Termination Payment" shall mean the
     unamortized portion (based on straight-line amortization over a 5-year
     period commencing on the Commencement Date) of the cost of "Lessee's Work"
     as of the effective date of such termination notice. Upon request by Lessor
     during any period that Lessee has ceased to occupy the Premises as
     aforesaid, Lessee shall provide to Lessor a reasonably detailed breakdown
     of the cost of Lessee's Work paid or incurred by Lessee to enable Lessor to
     calculate the amount of the Termination Payment.

6.   Taxes.
     -----
 
     6.1  TAXES. As used in this Lease, "Taxes" means all taxes, special or
          general assessments, water rents, rates and charges, sewer rents and
          other impositions and charges imposed by governmental authorities of
          every kind and nature whatsoever, extraordinary as well as ordinary
          and each and every installment thereof which shall or may during the
          Lease Term be charged, levied, laid, assessed, imposed, become due and
          payable or become liens upon or for or with respect to the Premises,
          the Building, the Land or any part thereof, or appurtenances or
          equipment owned by Lessor thereon or therein or any part thereof or on
          this Lease, and any tax based on a percentage fraction or capitalized
          value of the Rent (whether in lieu of or in addition to the taxes
          hereinbefore described). Taxes shall not include inheritance, estate,
          excise, succession, transfer, gift, franchise, income, gross receipt,
          or profit taxes except to the extent such are in lieu of or in
          substitution for Taxes as now imposed on the Building or the Land.

     6.2  PAYMENT OF TAXES. Lessee shall pay to Lessor, as Additional Rent, (i)
          "Lessee's Share" (which term shall mean shall be seventy-nine and
          sixty-eight hundredths percent (79.68%)) of Taxes, and (ii) Lessee's
          pro-rata

                                        8

<PAGE>   12

          share of Taxes with respect to each of the "Off-Site Lots" (as defined
          in Section 10 below) in which any of the parking spaces leased
          hereunder by Lessee are located. Lessee shall make such payment in the
          manner provided in Section 7 below. Lessee's obligations under this
          Section 6 shall be pro-rated for partial tax years at the beginning or
          end of the Lease Term.

     6.3  ABATEMENT OF TAXES. Lessor may at any time and from time to time make
          application to the appropriate governmental authority for an abatement
          of Taxes with respect to the Land and/or the Building. If Lessor files
          such an abatement application, Lessor shall pursue the same at its
          sole cost and expense (subject to potential reimbursement as provided
          below in this Section). If Lessor's application is successful and
          Lessee has made any payment in respect of Taxes pursuant to Section
          6.2 above for the period with respect to which the abatement was
          granted, Lessor shall (a) deduct from the amount of the abatement all
          expenses reasonably incurred by it in connection with the application,
          (b) pay to Lessee Lessee's Share (adjusted for any period for which
          Lessee had made a partial payment) of the abatement, with interest, if
          any, paid by the governmental authority on such abatement, and (c)
          retain the balance, if any.

          Lessee shall have the right to file an application for abatement of
          Taxes with respect to the Land and/or the Building only if (i) Lessee
          first inquires in writing to Lessor whether Lessor intends to file
          such an abatement application, and either (ii) (a) Lessor responds in
          writing that Lessor does not intend to file such an application or,
          (b) Lessee does not receive a response from Lessor within seven (7)
          business days after the day such request is made. If Lessee files such
          an abatement application, Lessee shall pursue the same at its sole
          cost and expense (subject to potential reimbursement as provided below
          in this Section) and shall keep Lessor informed of the status thereof.
          If Lessee's application is successful, Lessee shall (a) deduct from
          the amount of the abatement all expenses reasonably incurred by it in
          connection with the application, (b) retain Lessee's Share (adjusted
          for any period for which Lessee had made a partial payment) of the
          abatement, with interest, if any, paid by the governmental authority
          on such abatement, and (c) pay over the balance, if any, to Lessor.

7.   UTILITIES AND SERVICES. Lessee shall make its own arrangements for the
     provision of all utilities and

                                        9
<PAGE>   13

     services, including, without limitation, electricity, gas, heating fuels,
     trash removal, telephone service, and all maintenance and service
     agreements which are required for the Permitted Uses of the Premises, and
     shall pay when due all charges therefor directly to the company which
     provides such utility or service.

     The only services which Lessor shall provide to the Premises, the Building
     or the Land during the Lease Term (collectively, "Lessor's Services") shall
     be: (i) common area maintenance, (ii) extermination, (iii) alarm services,
     (iv) water and sewer, (v) snowplowing, paving, striping and general
     maintenance of the parking lots in which are located parking spaces leased
     by Lessee pursuant to Section 10.0 below, and (vi) such other services (if
     any) as Lessor may reasonably determine from time to time are necessary for
     the maintenance and operation of the Premises and which either are not
     provided by Lessee or cannot as a matter of law be provided to the Premises
     in the name of Lessee. It is agreed that property manager's fees shall not
     exceed seven (7%) percent of gross rental revenue of the Building. It is
     further agreed that the work performed (and the costs incurred) by Lessor
     in initially placing in serviceable condition the parking lot(s) in which
     the parking spaces are leased by Lessee pursuant to Section 10.0 below
     shall not be included in "Lessor's Services" or charged to Lessee.

     Within a reasonable time after the execution of this Lease, and thereafter
     within a reasonable time after the end of each of Lessor's fiscal years (or
     portion thereof) occurring during the Lease Term, Lessor shall deliver to
     Lessee (i) a statement of (a) the cost of Lessor's Services and (b) Taxes
     for the fiscal year just ended (the "Statement"), and (ii) a projection of
     (a) the cost of Lessor's Services and (b) Taxes for the then-current fiscal
     year. Commencing on the Commencement Date, and continuing on the first day
     of each calendar month thereafter, Lessee shall pay to Lessor, as
     Additional Rent, 1/12th of the total annualized amount of Lessee's Share of
     (a) the cost of Lessor's Services and (b) Taxes. Upon delivery to Lessee of
     the Statement for the preceding fiscal year, Lessor shall adjust Lessee's
     account accordingly. If the total amount paid by Lessee on account of the
     preceding fiscal year is less than the amount due hereunder, Lessee shall
     pay the balance due within thirty (30) days after delivery by Lessor of
     such Statement. If the total amount paid by Lessee on account of the
     preceding fiscal year exceeds the amount due hereunder, such excess shall
     be credited by Lessor against the monthly installment of Additional Rent
     next falling due or refunded to Lessee upon the expiration or termination
     of this Lease (unless such expiration or termination is the result of an
     Event of

                                       10

<PAGE>   14

     Default). Lessor's current fiscal year is July 1 - June 30, but Lessor
     reserves the right to change the fiscal year at any time during the Lease
     Term.

     Lessor shall not be held liable to anyone for the cessation of any of
     Lessor's Services due to any accident, to the making of repairs,
     alterations or improvements, or to the occurrence of an event of "Force
     Majeure" (as hereinafter defined). Lessor shall have no obligation to
     provide any services to the Premises, the Building, the Land or the Parking
     Area other than those expressly identified above in this Section. In no
     event shall Lessor be responsible for charges for any utilities or services
     consumed by Lessee or provided to Lessee at the Premises.

8.   Insurance
     ---------
 
     8.1  PUBLIC LIABILITY INSURANCE. Lessee shall take out and maintain in
          force throughout the Lease Term comprehensive public liability
          insurance naming Lessor, Lessee, and persons claiming under them, if
          any, as additional insureds against all claims and demands for any
          injury to persons or property which may be claimed to have occurred in
          the Premises, the Building, on the Land or on ways adjoining the Land,
          in an amount which at the beginning of the Lease Term shall not be
          less than $1,000,000 for injury or death of one person, $3,000,000 for
          injury or death of more than one person in a single accident and
          $500,000 for property damage, or such higher amounts as Lessor shall
          reasonably determine are required by reason of Lessee's use of the
          Premises, and which thereafter, if Lessor requires, shall be in such
          higher amounts as are then consistent with sound commercial practice
          in Cambridge, Massachusetts.

     8.2  CASUALTY INSURANCE. Lessee shall take out and maintain throughout the
          Lease Term a policy of fire, vandalism, malicious mischief, extended
          coverage and so-called all risk coverage insurance insuring all of
          "Lessee's Work", "Lessee's Property" and all "Alterations" (as these
          terms are hereinafter defined) for the benefit of Lessor and Lessee,
          as their respective interests may appear, in an amount equal to the
          replacement value thereof. Lessor shall be named as a certificate
          holder on such policy. Lessor shall, at Lessee's cost and expense,
          cooperate fully with Lessee and execute any and all consents and other
          instruments and take all other actions necessary to obtain the largest
          possible recovery. Lessor shall not carry any insurance concurrent in
          coverage and contributing in the event of

                                       11
<PAGE>   15

          loss with any insurance required to be furnished by Lessee hereunder
          if the effect of such separate insurance would be to reduce the
          protection or the payment to be made under Lessee's insurance.

          All insurance policies maintained pursuant to this Section 8.2 shall
          include insurance against payment of rents in an amount sufficient to
          pay all Rent which would otherwise be required to be paid under this
          Lease during the period of restoration.

     8.3  CERTIFICATE OF INSURANCE. All insurance required to be maintained by
          Lessee hereunder: shall be placed with insurers reasonably
          satisfactory to Lessor and authorized to do business in Massachusetts;
          shall provide that it may not be canceled without at least thirty (30)
          days prior written notice to each additional insured or certificate
          holder named therein; and shall provide that it may not be amended
          without at least ten (10) days prior written notice to each such
          person. Lessee shall furnish to Lessor certificates of insurance for
          all insurance required to be maintained by Lessee under this Lease,
          together with evidence reasonably satisfactory to Lessor of the
          payment of all premiums for such policies. Lessee, at Lessor's
          request, shall also deliver such certificates and evidence of payment
          to the holder of any mortgage affecting the Premises, the Building,
          the Land or any portion thereof.

     8.4  LESSOR'S INSURANCE. Lessor shall take out and maintain in force
          throughout the Lease Term, in a company or companies authorized to do
          business in Massachusetts, casualty insurance on the Building
          (excluding "Lessee's Work", "Lessee's Property" and all "Alterations"
          (as hereinafter defined)) in an amount equal to the full replacement
          value of the Building (exclusive of foundations and those items set
          forth in the preceding parenthetical in this sentence), covering all
          risks of direct physical loss or damage and so-called "extended
          coverage" risks. This insurance may be maintained in the form of a
          blanket policy covering the Building as well as other properties owned
          by Lessor. Notwithstanding the foregoing provisions of this Section
          8.4, Lessor shall have the right, at any time during the Lease Term,
          to self-insure all or any portion of the coverages required by this
          Section.

     8.5  WAIVER OF SUBROGATION. To the extent to which a waiver of subrogation
          clause is available, Lessor and Lessee shall obtain a provision in all
          insurance policies

                                       12

<PAGE>   16

          carried by such party covering the Premises, including but not limited
          to contents, fire and casualty insurance, expressly waiving any right
          on the part of the insurer against the other party. If extra cost is
          chargeable for such provision, then the party requesting such waiver
          shall be responsible for the payment of such extra cost.
          Notwithstanding the foregoing, with respect to such portion of the
          Lease Term during which Lessor elects to self-insure under Section 8.4
          above, then for purposes of this Section 8.5, Lessor shall be deemed
          to have maintained fire and all-risk coverage in an amount equal to
          one hundred (100%) percent of the insurable value of the Building
          (subject to the exceptions and exclusions set forth in Section 8.4
          above) with a waiver of subrogation clause contained therein.

     8.6  WAIVER OF RIGHTS. All claims, causes of action and rights of recovery
          for any damage to or destruction of persons, property or business
          which shall occur on or about the Premises, the Building or the Land,
          which result from any of the perils insured under any and all policies
          of insurance maintained by Lessor or Lessee, are waived by each party
          as against the other party, and the officers, directors, employees,
          contractors, servants and agents thereof, regardless of cause,
          including the negligence of the other party and its respective
          officers, directors, employees, contractors, servants and agents, but
          only to the extent of recovery, if any, under such policy or policies
          of insurance; PROVIDED, HOWEVER, that (i) this waiver shall be null
          and void to the extent that any such insurance shall be invalidated by
          reason of this waiver, and (ii) with respect to such portion of the
          Lease Term during which Lessor elects to self-insure under Section 8.4
          above, then for purposes of this Section 8.6, Lessor shall be deemed
          to have maintained fire and all-risk coverage in an amount equal to
          one hundred (100%) percent of the insurable value of the Building
          (subject to the exceptions and exclusions set forth in Section 8.4
          above).

9.   Assignment and Subletting.
     -------------------------
 
     (a)  Lessee shall not mortgage, pledge, hypothecate, or assign this Lease
          or sublease the Premises or any portion thereof (the term "sublease"
          shall be deemed to include any arrangement pursuant to which a third
          party is permitted by Lessee to occupy all or any portion of the
          Premises), without obtaining, on each occasion, the prior written
          consent of Lessor, which consent (in the

                                       13

<PAGE>   17

          case of a proposed assignment or sublease) shall not be unreasonably
          withheld, delayed or conditioned. Notwithstanding anything to the
          contrary contained in this Lease, Lessee shall not have more than
          three (3) subleases in effect at any one time (exclusive of subleases
          entered into pursuant to paragraph 9.0(i) below), nor shall Lessee
          have the right to assign this Lease or to sublet any portion of the
          Premises during the first twelve (12) months after the Commencement
          Date.

     (b)  If Lessee wishes to assign this Lease or sublease all or any portion
          of the Premises, Lessee shall so notify Lessor in writing and request
          Lessor's consent thereto. Such notice shall include (i) the name of
          the proposed assignee or sublessee, (ii) a general description of the
          types of business conducted by the proposed assignee or sublessee and
          a reasonably detailed description of the business operations proposed
          to be conducted in the Premises by such person or entity, (iii) such
          financial information concerning the proposed assignee or sublessee as
          Lessor may reasonably require, and (iv) all terms and provisions upon
          which such assignment or sublease is proposed to be made, including a
          copy of the assignment or sublease agreement which Lessee proposes to
          execute. Lessor shall have twenty (20) days from the day on which it
          receives Lessee's notice and such required information to give notice
          to Lessee that either (i) Lessor consents to such assignment or
          sublease, or (ii) Lessor withholds its consent to such assignment or
          sublease.

     (c)  If Lessor consents to an assignment or sublease: (i) Lessee shall
          promptly deliver to Lessor a fully executed copy of said assignment or
          sublease; (ii) Lessee shall remain primarily liable to Lessor
          hereunder (which liability shall be joint and several with the
          assignee or sublessee); and (iii) if the aggregate rent and other
          amounts payable to Lessee under or in connection with such assignment
          or sublease, after deduction of the costs reasonably incurred by
          Lessee in entering into such assignment or sublease (including,
          without limitation, reasonable attorneys' fees and expenses, brokerage
          commissions, and alteration costs amortized on a straight-line basis
          over the term of such sublease), exceeds the Rent payable hereunder,
          Lessee shall pay to Lessor immediately upon receipt thereof by Lessee,
          as Additional Rent, (i) during the Initial Term, twenty-five (25%)
          percent of such excess, and (ii) during the Extension Term, fifty
          (50%) percent of such excess.

                                       14
<PAGE>   18

     (d)  If Lessor withholds its consent to such assignment or sublease, Lessee
          shall not enter into the proposed assignment or sublease with such
          person or entity.

     (e)  Regardless of whether Lessor grants such consent, Lessee shall
          reimburse Lessor on demand, as Additional Rent, for all out of pocket
          costs and expenses (including, without limitation, attorneys' fees)
          reasonably incurred by Lessor in responding to a request for such
          consent.

     (f)  Lessee shall not be entitled to enter into any assignment or sublease,
          or to request Lessor's consent thereto, during the continuance of an
          Event of Default hereunder by Lessee.

     (g)  Any assignment or sublease entered into pursuant to this Section 9.0
          shall be subject to all of the terms and provisions of this Lease,
          including without limitation this Section 9.0. If Lessee enters into
          any such assignment or sublease, Lessor may, at any time and from time
          to time after the occurrence of a default hereunder, collect rent from
          such assignee or sublessee, and apply the net amount collected against
          Lessee's obligations hereunder, but no such assignment or sublease or
          collection shall be deemed an acceptance by Lessee of such assignee or
          sublessee as a lessee hereunder or as a release of the original named
          Lessee hereunder.

     (h)  Notwithstanding anything contained in this Lease, Lessee shall not
          enter into any assignment or sublease with any person or entity if the
          identity of the assignee or sublessee is inconsistent with the
          investment policies of Lessor as set forth in writing by the Executive
          Committee of Lessor prior to its receipt of Lessee's notice of such
          proposed assignment or sublease, and any such transaction shall be
          void AB INITIO. From time to time during the Term, Lessee may request
          in writing that Lessor deliver to it copies of all investment policies
          set forth in writing by the Executive Committee of Lessor since the
          last request made by Lessee which are relevant to the Premises or to
          this Lease, and Lessor shall provide the same within a reasonable time
          after receiving such request. Lessee shall maintain the
          confidentiality of all investment policies provided by Lessor pursuant
          to this Section, and shall not disclose the contents thereof or
          distribute copies thereof to any persons whatsoever

                                       15

<PAGE>   19

          (other than Lessee's counsel) without the prior written consent of
          Lessor.

     (i)  In the event that Lessee desires to assign this Lease or to sublease
          the Premises (or any portion thereof) to any corporation, partnership,
          association or other business organization directly or indirectly
          controlling or controlled by Lessee or under common control with
          Lessee, or to any successor by merger, consolidation or purchase of
          all or substantially all of the assets of Lessee, Lessee shall give at
          least twenty (20) days' prior written notice thereof to Lessor (unless
          Lessee is prohibited by applicable laws, codes, rules or regulations,
          or by the terms of the operative merger agreement or purchase and sale
          agreement from providing notice to Lessor at such time, in which event
          such notice shall be provided to Lessor as soon as Lessee is no longer
          subject to such prohibition). No consent of Lessor shall be required
          for any such assignment or sublease EXCEPT that Lessor shall have the
          right to withhold its consent if the identity of the assignee or
          sublessee is inconsistent with the investment policies identified in
          the foregoing paragraph (h) of this Section. Any assignee or sublessee
          which claims an interest in this Lease pursuant to a transfer of the
          type described in this paragraph (i) shall be bound by all of the
          terms and conditions of this Lease including, without limitation,
          those of the foregoing paragraph (h) of this Section, and if the
          identity of such assignee or successor is inconsistent with such
          investment policies, Lessor shall have the right to terminate this
          Lease and to exercise against such assignee or sublessee the remedies
          available to Lessor under this Lease, at law or in equity for a breach
          of the provisions hereof by Lessee. For the purpose of this Lease, the
          sale of Lessee's capital stock through any public exchange shall not
          be deemed an assignment or sublease of the Lease or of the Premises.

     (j)  Notwithstanding anything contained in this Lease, Lessee shall not,
          either voluntarily or by operation of law, make any transfer of this
          Lease or the Premises (or any portion thereof) which results in Lessee
          (or anyone claiming by, through or under Lessee) collecting in
          connection with the Premises any rental or other charge based on the
          net income or on the profits of any person so as to render any part of
          the Rent due hereunder "unrelated business taxable income" of Lessor
          as described in Section 512 of the Internal Revenue

                                       16

<PAGE>   20

          Code of 1986, as amended, and any such transfer shall be void AB
          INITIO.

10.  PARKING. During the Initial Term, Lessee shall have the right, to use a
     total of thirty-eight (38) parking spaces, subject to City of Cambridge
     parking and zoning ordinances. These spaces may be located in one or more
     parking lots located within 1,000 feet of the Land (collectively, the
     "Off-Site Lots"). Such parking spaces shall be designated for use by Lessee
     (but Lessor shall not be responsible for policing the use thereof). It is
     agreed that initially the off-site parking spaces will be located on
     Lessor's property at 252 Albany Street, but Lessor shall have the right to
     relocate such spaces to other Off-Site Lots within 1,000 feet of the Land
     from time to time during the Lease Term on thirty (30) days' prior written
     notice to Lessee.

     Lessee shall pay on account of such parking spaces, as Additional Rent, on
     the same day and in the same manner in which payments are to be made
     pursuant to Section 6.2 above, a percentage share of the Taxes assessed
     upon each of the Off-Site Lots in which any of the leased parking spaces
     are located, such percentage to be determined by dividing the number of
     parking spaces leased by Lessee pursuant to this Section in each of such
     Off-Site Lots as of the first day of the municipal fiscal year by the total
     number of parking spaces contained in each if such Off-Site Lots.

     During the Extension Term, Lessee shall pay, as Additional Rent, on the
     same day on which Basic Rent is due and payable hereunder, rent on account
     of each parking space leased at the then Fair Market Rent thereof, which
     amount may be adjusted by Lessor from year to year.

11.  LATE PAYMENT OF RENT. Lessee agrees that in the event that any payment of
     Basic Rent or Additional Rent shall remain unpaid at the close of business
     on the tenth business day after the same is due and payable hereunder,
     there shall become due to Lessor from Lessee, as Additional Rent and as
     compensation for Lessor's extra administrative costs in investigating the
     circumstances of late Rent, a late charge of two percent (2%) of the amount
     overdue. The assessment or collection of such a charge shall not be deemed
     to be a waiver by Lessor of any default by Lessee arising out of such
     failure to pay Rent when due.

12.  LESSEE'S COVENANTS. Lessee acknowledges that the Building is in good and
     satisfactory order, repair and condition, and covenants, at its sole cost
     and expense, during the Lease Term and such further time as Lessee holds
     any part of the Premises:

                                       17

<PAGE>   21

     (a)  to pay when due the Basic Rent and all Additional Rent, and all
          charges for utilities and services supplied to the Premises pursuant
          to agreements between Lessee and the appropriate utility company or
          provider of such services;

     (b)  to keep the Premises, including, without limitation, the Building
          systems (such as plumbing, heating, ventilation and air conditioning,
          and electrical) located within or serving the Premises and window
          glass and the non-structural portions of the roof (e.g., roof
          membrane) (but EXCLUDING the exterior skin of the Building, the
          structural components of the Building and the roof, and the Parking
          Area), in as good order, repair and condition as the same are in as of
          the date of this Lease or are hereafter put pursuant to the Work
          Letter, excepting only damage by fire or other casualty or taking
          which Lessee is not otherwise required by the terms of this Lease to
          repair or restore, reasonable wear and tear, and damage caused by
          other tenants of the Building;

     (c)  not to injure, overload or deface the Premises, nor to suffer or
          commit any waste therein, nor to place a load upon any floor which
          exceeds the floor load which the floor was designed to carry (Lessor
          hereby represents and warrants to Lessee that the floor load of the
          first floor of the Building is not less than 125 pounds per square
          foot), nor to connect any equipment or apparatus to any Building
          system which exceeds the capacity of such system, nor to permit on the
          Premises any auction sale or any inflammable fluids or chemicals which
          are not used, stored and disposed of in compliance with all laws,
          ordinances, codes, rules and regulations, and the provisions of any
          license, permit or other governmental consent or approval required for
          or applicable now or at any time during the Lease Term to the Premises
          or any portion thereof or Lessee's use thereof (collectively, "Legal
          Requirements"), nor to permit any nuisance or the emission from the
          Premises of any objectionable vibration, noise, or odor, nor to permit
          the use of the Premises for any purpose other than the Permitted Uses,
          nor any use thereof which is contrary to any Legal Requirements, or
          which is liable to invalidate or increase the premiums for any
          insurance on the Building or its contents, or liable to render
          necessary any alterations or additions to the Building;


                                       18

<PAGE>   22

     (d)  not to obstruct in any manner any portion of the sidewalks or
          approaches to the Building or any portion of the Parking Area;

     (e)  to comply with all Legal Requirements and all recommendations of
          Lessor's fire insurance rating organization now or hereafter in
          effect, to keep the Premises equipped with all reasonable and
          necessary safety appliances, and to procure (and maintain in full
          force and effect) all licenses, permits and other governmental
          consents and approvals required by any Legal Requirement or by the
          provisions of any applicable insurance policy because of the use made
          of the Premises by Lessee (without intending hereby to vary the
          provisions of Section 5.0 above), and, if requested by Lessor, to make
          all repairs, alterations, replacements or additions so required in and
          to the Premises, and to cooperate with Lessor in the obtaining and
          renewal by Lessor of all licenses, permits and other governmental
          consents and approvals with respect to the Premises, the Building or
          the Land which Lessor is required by applicable laws, ordinances,
          codes, rules or regulations to obtain in its own name;

     (f)  not to make any alterations, renovations, improvements and/or
          additions to the Premises (collectively, "Alterations"), without on
          each occasion obtaining prior written consent of Lessor, which consent
          may be withheld by Lessor in its reasonable discretion (taking into
          account the effect of such proposed Alterations on the structural
          integrity of the Building, whether such proposed Alterations would be
          detrimental to the Building systems as modified by Lessee's Work, and
          the effect of such proposed Alterations on the external appearance of
          the Building), (except that no such prior written consent of Lessor
          shall be required for Alterations which (i) shall not exceed $10,000
          in each instance, and (ii) do not affect the structural integrity of
          the Building, and (iii) are not detrimental to the Building systems as
          modified by Lessee's Work, and (iv) do not affect the exterior
          appearance of the Building, PROVIDED that in each such case (x) Lessee
          shall still provide advance notice to Lessor of the intended
          Alterations, and (y) such Alterations shall be subject to all of the
          provisions of this paragraph (f) other than the requirement of
          Lessor's prior consent); or to make any holes in any part of the
          Building or paint or place any signs, awnings, aerials or flagpoles,
          or the like, visible from outside of the Premises and not previously
          consented to in writing by Lessor. Prior to commencing

                                       19

<PAGE>   23

          any Alterations, Lessee shall: secure all necessary licenses, permits
          and other governmental consents and approvals; obtain the written
          approval of Lessor as to the plans and specifications for such work
          (where such approval is required under this paragraph (f)); obtain the
          written approval of Lessor as to the general contractor (not to be
          unreasonably withheld, delayed or conditioned); cause each contractor
          and subcontractor to carry worker's compensation insurance in
          statutory amounts covering all of the contractor's and subcontractor's
          employees; and cause each general contractor (or each trade contractor
          if there is no general contractor) to carry comprehensive public
          liability insurance in amounts reasonably satisfactory to Lessor (such
          insurance to be written by companies reasonably satisfactory to Lessor
          and insuring Lessee and Lessor as well as the contractors). After the
          first two (2) requests for Lessor's approval of proposed Alterations,
          Lessee shall reimburse Lessor, promptly upon demand therefor, for
          one-half (1/2) of all out-of-pocket costs and expenses reasonably
          incurred by Lessor in reviewing any plans, drawings and specifications
          submitted by Lessee pursuant to this paragraph (f) (but Lessee shall
          not be required to pay to Lessor more than $3,000.00 in connection
          with any one set of Alterations and this charge shall not apply to any
          Alterations proposed to be constructed by Lessee in the Expansion
          Premises in anticipation of the initial occupancy thereof by Lessee),
          which reimbursement shall be due and payable as Additional Rent. All
          Alterations (other than Tenant's removable personal property and trade
          fixtures) shall remain part of the Premises and shall not be removed
          upon the expiration or earlier termination of the Lease Term EXCEPT
          for those items which (i) either Lessor or Lessee designates for
          removal in a notice given to the other party at the time that Lessee
          requests Lessor's approval of such Alteration (if such approval is
          required hereunder), or (ii) Lessee designates for removal at the time
          that it notifies Lessor of its intent to make such Alteration (where
          Lessor's prior approval is not required hereunder), or (iii) Lessor
          designates for removal in a notice given to Lessee within ten (10)
          days after Lessee notifies Lessor of its intent to make such
          Alteration (where Lessor's prior approval is not required hereunder).
          Lessee shall pay promptly when due the entire cost of such work.
          Lessee shall not cause or permit any liens for labor or materials
          performed or furnished in connection therewith to attach to the Land
          or the Building, and shall discharge or bond any such liens which may
          be

                                       20

<PAGE>   24

          filed or recorded within thirty (30) days after the filing or
          recording thereof. All such work shall be performed in a good and
          workmanlike manner and in compliance with all Legal Requirements and
          the provisions of all applicable insurance policies. Promptly after
          the completion of any Alterations, Lessee shall provide an as-built
          plan (or, where appropriate in light of the nature or scope of the
          Alterations, an as-built sketch) thereof to Lessor. Lessee shall
          indemnify and hold Lessor harmless from and against any and all suits,
          demands, causes of action, claims, losses, debts, liabilities,
          damages, penalties or judgments, including, without limitation,
          reasonable attorneys' fees, arising from injury to any person or
          damage to any property occasioned by or growing out of such work
          performed prior to the last day of the Lease Term, which indemnity
          shall survive the expiration or termination of this Lease provided
          that such claim is asserted not later than three (3) years after the
          expiration or earlier termination of the Lease Term. The provisions of
          this paragraph (f) shall not apply to the performance of "Lessee's
          Work" (as defined in the Work Letter) but shall apply to any
          Alterations proposed by Lessee to be constructed in any space leased
          pursuant to Section 2.0 above);

     (g)  to save Lessor harmless and indemnified from any loss, cost and
          expense (including, without limitation, reasonable attorney's fees)
          arising out of or relating to (i) a claim of injury to any person or
          damage to any property while in the Premises, if not due to the
          negligence or willful misconduct of Lessor or its officers, agents,
          employees, servants or contractors, or the breach of Lessor's
          obligations under this Lease; or to (ii) a claim of injury to any
          person or damage to any property while in the Building (but not within
          the Premises) or on the Land or on the sidewalks or ways adjoining the
          Land, occasioned by any omission, neglect or default of Lessee or of
          anyone claiming by, through, or under Lessee, or any officer, agent,
          employee, servant, contractor or invitee of any of the foregoing. The
          provisions of this clause (g) shall survive the expiration or
          termination of this Lease with respect to any claim arising prior to
          the last day of the Lease Term regardless of whether such claim has
          been asserted by the last day of the Lease Term;

     (h)  consistent with the provisions of this paragraph (h) concerning
          Lessor's access to the Premises, to permit Lessor and Lessor's agents
          to examine the Premises at reasonable times, and if Lessor shall so
          elect (without

                                       21

<PAGE>   25

          hereby imposing any obligation on Lessor to do so), to permit Lessor
          to make any repairs or additions Lessor may deem necessary; and at
          Lessee's expense to remove any Alterations, signs, awnings, aerials or
          flagpoles, or the like, not consented to in writing; and to permit
          Lessor to show the Premises to prospective purchasers and tenants (at
          reasonable times on reasonable advance notice to Lessee) and to keep
          affixed to any suitable part of the Premises, during the nine (9)
          months preceding the expiration of the Lease Term, appropriate notices
          for letting or selling.

          Notwithstanding anything to the contrary contained herein, except in
          the event of an emergency requiring prompt attention in order to
          prevent damage to life or serious property damage, Lessor shall be
          permitted access to the Premises only upon at least twenty-four (24)
          hours' prior written notice to Dr. William Kelley or such other
          management level employee designated by Lessee, and when accompanied
          by a representative of Lessee designated by Lessee. Any such access
          shall only be permitted during Lessee's normal business hours and
          shall not unreasonably interfere with Lessee's operations. Lessor
          shall take all reasonable precautions necessary to minimize any
          disruption of Lessee's activities. All persons entering the Premises
          shall comply with all reasonable safety and security requirements of
          Lessee. No access shall be permitted into those portions of the
          Premises designated by Lessee as a "clean room" or as a secured area
          except in the event of an emergency or at other times upon the
          conditions set forth in the preceding provisions of this paragraph
          (h). In the event of an emergency which occurs during traditional
          business hours, prior to entering the Premises, Lessor shall provide
          oral notice to Lessee. In the event of an emergency which does not
          occur during traditional business hours, prior to entering the
          Premises, Lessor shall provide notice to Lessee via telephonic
          transmission to such telecopier numbers and telephonic pager numbers
          as Lessee may provide from time to time;

     (i)  that all merchandise, furniture, fixtures, effects and property of
          every kind of Lessee and of all persons claiming by, through or under
          Lessee which may be on the Premises from time to time (collectively,
          "Lessee's Property") shall be at the sole risk of Lessee, and Lessor
          shall not be liable if the whole or any part thereof shall be
          destroyed or damaged by fire, water or otherwise, or by the leakage or
          bursting of water pipes, steam pipes, or other pipes, or by theft or
          from

                                       22

<PAGE>   26

          any other cause unless caused by the negligence or willful misconduct
          of Lessor;

     (j)  to pay promptly when due, all taxes of any kind levied, imposed or
          assessed on Lessee's Property, which taxes shall be the sole
          obligation of Lessee, whether the same is assessed to Lessee or to any
          other person and whether the property on which such tax is levied,
          imposed or assessed shall be considered part of the Premises or
          personal property; PROVIDED, HOWEVER, that Lessee shall have the right
          to contest the amount of any such taxes by appropriate legal
          proceedings diligently conducted in good faith, without cost, expense,
          liability or damage to Lessor, provided in each case that: (i) no lien
          or encumbrance shall attach to the Land, Building or any equipment and
          improvements therein by reason of non-payment or otherwise by reason
          of such contest; (ii) Lessee shall indemnify Lessor against liability
          resulting from or incurred in connection with such contest; and (iii)
          Lessee shall keep Lessor regularly advised as to the status of such
          contest;

     (k)  by the end of business on the last day of the Lease Term (or the
          effective date of any earlier termination of this Lease as herein
          provided), to remove all of Lessee's Property, and those Alterations
          designated for removal as provided in paragraph (f) above, whether the
          same be permanently affixed to the Premises or not, and to repair any
          damage caused by any such removal to Lessor's reasonable satisfaction;
          and to remove the contents of all neutralization tanks installed by
          Lessee in the Premises; and peaceably to yield up the Premises clean
          and in good order, repair and condition (excepting only reasonable
          wear and tear, and damage by fire or other casualty or taking which
          Lessee is not otherwise required by the terms of this Lease to repair
          or restore); and to deliver the keys to the Premises to Lessor. Any of
          Lessee's Property or those Alterations designated for removal as
          provided in paragraph (f) above, which is not removed by such date
          shall be deemed abandoned and may be removed and disposed of by Lessor
          in such manner as Lessor may determine, and Lessee shall pay to Lessor
          on demand, as Additional Rent, the entire cost of such removal and
          disposition, together with the costs and expenses incurred by Lessor
          in making any incidental repairs and replacements to the Premises
          necessitated by Lessee's failure to remove Lessee's Property or any of
          those Alterations designated for removal as provided in paragraph (f)
          above, as required herein or by any other failure of

                                       23

<PAGE>   27

          Lessee to comply with the terms of this Lease, and for use and
          occupancy during the period after the expiration of the Lease Term and
          prior to Lessee's performance of its obligations under this paragraph
          (k). Lessee hereby acknowledges that any failure or delay on Lessee's
          part in surrendering the Premises as above provided shall subject
          Lessor to the expense of performing such work and the risk of losing a
          successor tenant;

     (l)  to pay Lessor's reasonable expenses, including reasonable attorneys'
          fees, incurred in enforcing any obligations of Lessee under this
          Lease;

     (m)  not to generate, store or use any "Hazardous Materials" (as
          hereinafter defined) in or on the Premises except those identified in
          writing to Lessor from time to time (such identification may take the
          form of delivery by Lessee to Lessor of material safety data sheets
          for such Hazardous Materials), and then only in compliance with any
          and all applicable Legal Requirements, or dispose of Hazardous
          Materials from the Premises to any other location, except a properly
          approved disposal facility and then only in compliance with any and
          all applicable Legal Requirements, nor permit any occupant of the
          Premises to do so. As used in this Lease, "Hazardous Materials" means
          and includes any chemical, substance, waste, material, gas or emission
          which is radioactive or is deemed hazardous, toxic, a pollutant, or a
          contaminant under any statute, ordinance, by-law, rule, regulation,
          executive order or other administrative order, judgment, decree,
          injunction or other judicial order of or by any governmental
          authority, now or hereafter in effect, relating to pollution or
          protection of human health or the environment, including, without
          limitation, those enumerated in the following sentence (collectively,
          "Environmental Laws"). By way of illustration and not limitation,
          "Hazardous Materials" includes "oil", "hazardous materials",
          "hazardous waste", and "hazardous substance" as defined in the
          Comprehensive Environmental Response, Compensation and Liability Act,
          42 U.S.C. Section 9601 ET SEQ., as amended, the Resource Conservation
          and Recovery Act of 1976, 42 U.S.C. Section 6902 ET SEQ., as amended,
          and the Toxic Substances Control Act, 15 U.S.C. Section 2601 ET SEQ.,
          as amended, the regulations promulgated thereunder, and Massachusetts
          General Laws, Chapter 21C and Chapter 21E and the regulations 
          promulgated thereunder. If at any time during the Lease Term, any 
          governmental authority, by reason of the use of the Premises made by 
          Lessee or

                                       24

<PAGE>   28

          anyone claiming by, through or under Lessee, requires testing to
          determine whether there has been any release of Hazardous Materials by
          Lessee, then Lessee shall reimburse Lessor upon demand, as Additional
          Rent, for the reasonable costs thereof. If, in anticipation of the
          commencement of the Lease Term or at any time during the Lease Term,
          Lessee performs any testing to determine whether there has been any
          release of Hazardous Materials onto or below the surface of the
          Premises, Lessee shall promptly provide a copy of such report to
          Lessor at no charge to Lessor. Lessee shall execute such affidavits as
          may be reasonably requested by Lessor from time to time, concerning
          Lessee's best knowledge and belief concerning the presence of
          Hazardous Materials in or on the Premises. Subject to the provisions
          of Section 12(h) above, Lessor reserves the right to enter the
          Premises at reasonable times (provided twenty-four (24) hours' notice
          is given to Lessee, except in case of emergency) to inspect the same
          for Hazardous Materials. Lessee's obligations under this paragraph (m)
          shall include, if at any time during the Lease Term Lessee uses or
          stores radioactive materials on the Premises, compliance with all
          so-called "close-out" procedures of the Nuclear Regulatory Commission
          or other federal, state or local governmental authorities having
          jurisdiction over radioactive materials, regardless of whether or not
          such procedures are completed prior to the expiration or earlier
          termination of the Lease Term. Lessee shall indemnify, defend, and
          hold harmless Lessor, and the holder of any mortgage on the Premises
          or any portion thereof, from and against any claim, cost, expense,
          liability, obligation or damage, including, without limitation,
          reasonable attorneys' fees and the cost of litigation, arising from or
          relating to the breach by Lessee of the provisions of this clause (m),
          and shall immediately discharge or cause to be discharged any lien
          imposed upon the Building or the Land in connection with any such
          claim.

          Lessee shall not be responsible for any noncompliance with
          Environmental Laws or Legal Requirements to the extent attributable to
          conditions already existing on the date hereof, or contamination
          caused by Lessor or any other tenant of Lessor (excluding Lessee and
          anyone claiming by, through or under Lessee) or their respective
          employees, agents and invitees after the date hereof. Nothing herein
          shall be deemed to create an obligation on the part of Lessee with
          respect to (1) contamination already existing before the date hereof,
          or (2) contamination caused by Lessor or any other

                                       25

<PAGE>   29

          tenant of Lessor (excluding Lessee and anyone claiming by, through or
          under Lessee) or their respective agents, employees or invitees after
          the date hereof. For purposes of this paragraph 12(m) and this Lease,
          the term "contamination" shall mean the uncontained presence of
          Hazardous Materials at the Premises, or arising from the Premises,
          which requires remediation under any applicable Environmental Law or
          Legal Requirement.

          Nothing herein shall be deemed to impair Lessee's right to contest any
          governmental agency's orders or directives with respect to
          environmental matters PROVIDED that (i) such contest is diligently
          conducted in good faith, in the name of Lessee, without cost, expense,
          liability or damage to Lessor; (ii) such contest shall not subject
          Lessor to civil or criminal penalty or to prosecution for a crime, nor
          subject the Land, the Building or any part thereof to being condemned
          or vacated, or subject to any lien or encumbrance, by reason of such
          contest; (iii) before the commencement of such contest, Lessee shall
          furnish to Lessor the bond of a surety company reasonably satisfactory
          to Lessor, in form and substance reasonably satisfactory to Lessor, or
          other security in a form reasonably acceptable to Lessor, in an amount
          equal to one hundred percent (100%) of the cost of compliance with
          such order or directive (as reasonably estimated by Landlord); (iv)
          Lessee shall indemnify Lessor against the cost of such compliance and
          liability resulting from or incurred in connection with such contest
          or non-compliance; and (v) Lessee shall keep Lessor regularly advised
          as to the status of such proceedings in good faith.

          The provisions of this clause (m) shall survive the expiration or
          termination of this Lease; and

     (n)  not to permit any officer, agent, employee, servant, contractor or
          visitor of Lessee to violate any covenant or obligation of Lessee
          hereunder.

13.  Construction
     ------------

     13.1 WORK LETTER. The Premises shall be renovated and finished in
          accordance with the provisions of the Work Letter attached hereto as
          EXHIBIT C.

     13.2 ROOF LOAD CAPACITY. Lessee shall cause its structural engineer to
          inspect the roof of the Building in those locations in which Lessee
          intends to install roof-top

                                       26


<PAGE>   30

          equipment as part of "Lessee's Work" (as defined in the Work Letter).
          If such engineer determines that the roof load capacity is less than
          30 pounds per square foot in any of such locations: (i) Lessee shall
          notify Lessor in writing; and (ii) as part of Lessee's Work, Lessee
          shall reinforce such portions of the roof as reasonably required for
          the roof-top equipment which Lessee intends to install; and (iii) upon
          completion of Lessee's Work (as evidenced by a "Certificate of
          Substantial Completion" issued by Lessee's architect) and the
          commencement of the payment of Rent by Lessee, Lessee shall be
          entitled to submit to Lessor for reimbursement paid invoices for the
          cost of such reinforcement of the roof. Provided that such invoices
          are reasonably satisfactory in form and content to Lessor, then Lessor
          shall promptly reimburse Lessee for such cost. The amount of such
          reimbursement shall be fully amortized over the portion of the Initial
          Lease Term remaining as of the date of such payment by Lessor to
          Lessee, on a straight-line basis. Lessee shall pay such amounts in
          equal monthly installments, as Additional Rent, at the same time and
          in the same manner as Basic Rent.

     13.3 FLOOR LOADS. In the event that at any time during the performance of
          Lessee's Work, Lessee's structural engineer determines that the floor
          load of the first floor of the Premises is less than 125 pounds per
          square foot, Lessee shall notify Lessor in writing. If requested by
          Lessee, Lessor shall, at its sole cost and expense and without
          reimbursement from Lessee, be responsible for reinforcing such
          portions of the first floor of the Building so as to achieve a floor
          load of at least 125 pounds per square foot.

14.  Eminent Domain and Casualty.
     ----------------------------

     14.1 SUBSTANTIAL TAKING. In the event that (i) more than fifty (50%)
          percent of the rentable area of the Premises then occupied by the
          named Lessee itself, shall be taken by any exercise of the right of
          eminent domain or other lawful power in pursuance of any public or
          other authority during the Lease Term, then this Lease shall terminate
          as of the time that possession is taken by the taking authority.

     14.2 AWARDS. Lessor reserves and excepts all rights to damage to the
          Premises, the Building, the Land and the leasehold hereby created, now
          accrued or hereafter accruing by reason of any exercise of eminent
          domain, or by reason of anything lawfully done in pursuance of

                                       27

<PAGE>   31

          any public or other authority, and by way of confirmation, Lessee
          grants to Lessor all of Lessee's rights to such damages and covenants
          to execute and deliver such further instruments of assignment thereof
          as Lessor may from time to time request. Lessee shall be entitled only
          to such award, if any, as is specifically allocated by the taking
          authority to Lessee on account of relocation expenses or other damages
          suffered by Lessee as a result of such taking.

     14.3 SUBSTANTIAL CASUALTY. If the Premises are damaged by fire or other
          casualty, Lessee shall promptly notify Lessor thereof. If the Premises
          or any part thereof shall be so damaged to the extent that more than
          fifty (50%) percent of the rentable area of the Premises then occupied
          by the named Lessee itself is rendered unusable by Lessee for the
          operation of its business in the Premises (whether by reason of direct
          or indirect damage from the casualty), or if the Building is so
          damaged (regardless of whether or not the Premises are damaged) that
          Lessee is deprived of all reasonable access to the Premises or all
          reasonable use of the Premises, then in either case either Lessor or
          Lessee may terminate this Lease by giving written notice of such
          termination to the other party within sixty (60) days after the date
          of such damage, in which event this Lease shall terminate on the date
          set forth in such notice. In the event that this Lease is terminated
          pursuant to this Section 14.3: (i) Rent shall be abated, to the extent
          the Premises are unusable for the Permitted Uses, from and after the
          date of such damage to the date of such termination of this Lease, and
          no further Rent shall accrue or be payable after the date of such
          termination; and (ii) Lessee shall turn over and assign to Lessor all
          insurance proceeds (and rights to receive the same) relating to
          Lessee's Work and any Alterations EXCEPT for the portion (if any) of
          such proceeds which is allocable to the actual cash value of the
          components thereof which had previously been designated in writing to
          by one party to the other as items to be removed upon the expiration
          of the Lease Term.

     14.4 REPAIR AND RESTORATION. In the event of a taking which does not result
          in the termination of this Lease pursuant to Section 14.1 above, or a
          casualty which does not result in the termination of this Lease
          pursuant to Section 14.3 above, the Premises shall be repaired and
          restored in the manner provided in this Section. Lessor shall
          diligently act to restore the Building and the Premises (exclusive of
          Lessee's Work,

                                       28
<PAGE>   32

          any Alterations made by Lessee, and Lessee's Property) or, in case of
          taking, what remains thereof, to substantially the condition in which
          they existed prior to the occurrence of such taking or casualty,
          provided, however, that: (i) in no event shall Lessor be required to
          spend in connection with restoring the Premises more than the amount
          of insurance proceeds or taking award actually received and allocable
          thereto (except that this limitation with respect to insurance
          proceeds shall not apply to casualties occurring during such time as
          Lessor self-insures pursuant to Section 8.4 above); (ii) Lessor shall
          not be required to restore or replace any of Lessee's Work,
          Alterations or Lessee's Property; and (iii) promptly upon completion
          of such work by Lessor, Lessee shall diligently act to restore and/or
          replace Lessee's Work, the Alterations and all of Lessee's Property to
          substantially the same condition they were in prior to the occurrence
          of such taking or casualty. All work performed by Lessor or by Lessee
          pursuant to this Section shall be performed in a good and workerlike
          manner, and in compliance with all Legal Requirements. Lessor shall
          not be liable for any inconvenience or annoyance to Lessee or injury
          to the business of Lessee resulting in any way from such taking or
          damage or the repair thereof. Rent shall be abated from and after the
          date of such taking or damage to the date on which Lessor
          substantially completes the restoration described above, to the extent
          the Premises are unusable for the Permitted Uses, but the amount of
          such abatement shall in no event exceed the amount received by Lessor
          under the rental loss insurance policy required by Section 8.2 above.

          Notwithstanding the foregoing provisions of this Section:

          (a)  in the event that Lessor has not substantially completed, within
               one (1) year after the date of such taking or damage (which
               period shall be extended by the duration of any and all events of
               Force Majeure), the restoration work which it is required by this
               Section to perform, then Lessee shall have the right to terminate
               this Lease by giving thirty (30) days' written notice to Lessor
               within thirty (30) days after the end of such 1-year period (as
               such 1-year period may be extended as provided above); and

          (b)  in the event that Lessor determines that the amount of insurance
               proceeds available for the repair and restoration work for which
               Lessor is

                                       29

<PAGE>   33

               responsible under this Section and Lessor refuses to provide the
               funds necessary to make up such deficit, Lessor shall notify
               Lessee within thirty (30) days of the occurrence of such
               casualty. Lessee shall then have the right to terminate this
               Lease by giving written notice to Lessor within fifteen (15) days
               after Lessee's receipt of Lessor's notice.

     14.5 CASUALTY DURING LAST 12 MONTHS. Notwithstanding anything to the
          contrary contained in this Lease, in the event that a material portion
          of the Premises is damaged by a fire or other casualty occurring
          during the last twelve (12) months of the Lease Term, either party may
          terminate this Lease by giving written notice to the other within
          thirty (30) days of the occurrence of such damage. If this Lease is so
          terminated, Lessee shall turn over and assign to Lessor all insurance
          proceeds (and rights to receive the same) relating to the Building
          EXCEPT as otherwise provided in the last sentence of Section 14.3
          above. However, if Lessee has exercised an Extension Option prior to
          the occurrence of such casualty, then this Section 14.5 shall not
          apply and neither party shall have the right to terminate this Lease
          pursuant to this Section 14.5.

15.  Defaults; Events of Default; Remedies.
     --------------------------------------

     15.1 DEFAULTS; EVENTS OF DEFAULT. The following shall, if any requirement
          for notice or lapse of time or both has not been met, constitute
          defaults hereunder, and, if such requirements have been met,
          constitute "Events of Default" hereunder:

          (a)  The failure of Lessee to perform or observe any of Lessee's
               covenants or agreements hereunder concerning the payment of money
               for a period of ten (10) business days after written notice
               thereof, PROVIDED, HOWEVER, that Lessee shall not be entitled to
               such notice if Lessor has given notice to Lessee of two or more
               previous such failures within a twelve-month period, in which
               event such failure shall constitute an Event of Default hereunder
               upon the expiration of ten (10) business days after such payment
               was due;

          (b)  The failure of Lessee to maintain the insurance required
               hereunder in full force and effect;

          (c)  The failure of Lessee to perform or observe any of Lessee's other
               covenants or agreements hereunder

                                       30

<PAGE>   34

               for a period of thirty (30) days after written notice thereof
               (provided that, in the case of defaults not reasonably curable in
               thirty (30) days through the exercise of reasonable diligence,
               such 30-day period shall be extended for so long as Lessee
               commences cure within such period and thereafter prosecutes such
               cure to completion continuously and with reasonable diligence);
               and

          (d)  if the leasehold hereby created shall be taken on execution, or
               by other process of law, and such taking is not vacated by a
               final order of a court of competent jurisdiction within sixty
               (60) days thereafter; or if any assignment shall be made of
               Lessee's property for the benefit of creditors; or if a receiver,
               guardian, conservator, trustee in bankruptcy or similar officer
               shall be appointed to take charge of all or any part of Lessee's
               property by a court of competent jurisdiction, and such
               appointment is not vacated by a final order of a court of
               competent jurisdiction within sixty (60) days thereafter; or if a
               petition is filed by Lessee under any bankruptcy or insolvency
               law; or if a petition is filed against Lessee under any
               bankruptcy or insolvency law and the same shall not be dismissed
               within sixty (60) days from the date upon which it is filed; or
               if a lien or other involuntary encumbrance is filed against
               Lessee's leasehold (or against the Premises, the Building or the
               Land based on a claim against Lessee) and is not discharged or
               bonded within thirty (30) days after the filing thereof.

     15.2 TERMINATION. If an Event of Default shall occur, Lessor may, at its
          option, immediately or any time thereafter and without demand or
          notice, enter upon the Premises or any part thereof in the name of the
          whole and repossess the same as of Lessor's former estate and
          dispossess Lessee and those claiming through or under Lessee and
          remove their effects, without being deemed guilty of any manner of
          trespass and without prejudice to any remedies which might otherwise
          be used for arrears of rent or preceding breach of covenant, and upon
          such entry this Lease shall terminate. In lieu of making such entry,
          Lessor may terminate this Lease upon five (5) business days' prior
          written notice to Lessee. Upon any termination of this Lease as the
          result of an Event of Default, Lessee shall quit and peacefully
          surrender the Premises to Lessor.


                                       31

<PAGE>   35

     15.3 SURVIVAL OF COVENANTS. No such termination of this Lease shall relieve
          Lessee of its liability and obligations under this Lease and such
          liability and obligations shall survive any such termination. Lessee
          shall indemnify and hold Lessor harmless from all loss, cost, expense,
          damage or liability arising out of or in connection with such
          termination.

          In the event of any such termination, Lessee shall pay to Lessor the
          Rent up to the time of such termination. Lessee shall remain liable
          for, and shall pay on the days originally fixed for such payment
          hereunder, the full amount of all Basic Rent and Additional Rent as if
          this Lease had not been terminated; PROVIDED, HOWEVER, if Lessor
          relets the Premises, there shall be credited against such obligation
          the amount actually received by Lessor each month from such lessee
          after first deducting all costs and expenses incurred by Lessor in
          connection with reletting the Premises.

          At any time within one (1) year after such termination, and regardless
          of whether Lessee has made any payments to Lessor pursuant to the
          preceding paragraph of this Section, Lessor may demand and Lessee
          agrees to pay to Lessor on such demand, as and for liquidated and
          agreed damages for Lessee's default, the present value of the amount
          by which:

          (a)  the aggregate Rent which would have been payable under this 
               Lease by Lessee from the date of such termination until what 
               would have been the last day of the Lease Term but for such 
               termination, EXCEEDS

          (b)  the greater of (i) the fair and reasonable rental value of the
               Premises for the same period, less Lessor's reasonable estimate 
               of expenses to be incurred in connection with reletting the 
               Premises, including, without limitation, all repossession costs,
               brokerage commissions, legal expenses, reasonable attorneys' 
               fees, alteration costs, and expenses of preparation for such 
               reletting, or (ii) the sum of (A) the amount actually received 
               or to be by Lessor from reletting the Premises pursuant to 
               leases which are in effect as of the date on which Lessor 
               elects to proceed under this paragraph, and (B) the amount (if 
               any) actually received by Lessor from Lessee pursuant to the 
               preceding paragraph of this Section on account of any period 
               after such termination.

                                       32

<PAGE>   36

          If the Premises or any part thereof are relet by Lessor for the period
          prior to what would have been the last day of the Lease Term but for
          such termination, or any portion thereof, the amount of rent reserved
          upon such reletting shall be, PRIMA FACIE, the fair and reasonable
          rental value for the part or the whole of the Premises so relet during
          the term of the reletting.

          In the event of the filing of a petition by or against Lessee under
          any federal bankruptcy or insolvency law now or hereafter in effect,
          nothing herein contained shall limit or prejudice the right of Lessor
          to prove and obtain as liquidated damages by reason of such
          termination, an amount equal to the maximum allowed by any statute or
          rule of law in effect at the time when, and governing the proceedings
          in which, such damages are to be proved, whether or not such amount be
          greater, equal to, or less than the amount of the difference referred
          to above.

     15.4 RIGHT TO RELET. At any time or from time to time after any such
          termination, Lessor may relet the Premises or any part thereof for
          such a term (which may be greater or less than the period which would
          otherwise have constituted the balance of the Lease Term) and on such
          conditions (which may include concessions or free rent) as Lessor, in
          its reasonable discretion, may determine, and may collect and receive
          the rents therefor. Lessor shall in no way be responsible or liable
          for any failure to relet the Premises or any part thereof, or for any
          failure to collect any rent due upon any such reletting.

     15.5 RIGHT TO EQUITABLE RELIEF. In the event of the occurrence of an Event
          of Default hereunder, Lessor shall be entitled to seek to enjoin the
          continuance thereof and shall have the right to invoke any right and
          remedy allowed at law or in equity or by statute or otherwise as
          though re-entry and other remedies were not provided for in this
          Lease.

     15.6 RIGHT TO SELF HELP. In the event of the occurrence of an Event of
          Default hereunder, Lessor shall have the right to perform such
          defaulted obligation of Lessee, including the right to enter upon the
          Premises to do so. Lessor shall, as a courtesy only, notify Lessee of
          its intention to perform such obligation. In the event of a default by
          Lessee hereunder which has not yet continued beyond the expiration of
          the applicable grace period but which Lessor determines constitutes an
          emergency threatening imminent injury to persons or

                                       33

<PAGE>   37

          damage to property, Lessor shall have the right to perform such
          defaulted obligation of Lessee (including the right to enter upon the
          Premises to do so) after giving Lessee such notice (if any) as is
          reasonable under the circumstances. In either event, the aggregate of
          (i) all sums so paid by Lessor, (ii) interest at the rate of the
          "prime" rate from time to time thereafter published in THE WALL STREET
          JOURNAL plus 1-1/2% per annum on such sum, and (iii) all necessary
          incidental costs and expenses in connection with the performance of
          any such act by Lessor, shall be deemed to be Additional Rent under
          this Lease and shall be payable to Lessor immediately upon demand.
          Lessor may exercise its rights under this Section 15.6 without waiving
          any other of its rights or releasing Lessee from any of its
          obligations under this Lease.

     15.7 FURTHER REMEDIES. Nothing in this Lease contained shall require Lessor
          to elect any remedy for an Event of Default by Lessee hereunder, and
          all rights herein provided shall be cumulative with one another and
          with any other rights and remedies which Lessor may have at law or in
          equity in the case of such Event of Default.

16.  Intentionally Deleted.
     ---------------------

17.  REAL ESTATE BROKER. Lessor and Lessee each represent to the other that they
     have dealt with no broker in connection with this Lease other than Meredith
     & Grew, Inc. ("Broker"). Lessor shall pay the Broker as part of a separate
     agreement. Lessee agrees to indemnify and hold Lessor harmless from and
     against any claims for commissions or fees by any person other than the
     Broker arising from a breach by Lessee of the foregoing representation.
     Lessor agrees to indemnify and hold Lessee harmless from and against any
     claims for commissions or fees by the Broker or any other person by reason
     of a breach by Lessor of the foregoing representation.

18.  NOTICES. Whenever by the terms of this Lease notice, demand, or other
     communication shall or may be given either to Lessor or to Lessee, the same
     shall be in writing and shall be sent by hand, or by registered or
     certified mail, postage prepaid, or by Federal Express or other similar
     overnight delivery service, to:


                                       34
<PAGE>   38

     Lessor:                  Massachusetts Institute of Technology
                              Suite 200
                              238 Main Street
                              Cambridge, Massachusetts 02142
                              Attention:  Philip A. Trussell,
                                          Director of Real Estate

     with a copy to:          Peter Friedenberg, Esquire
                              Rackemann, Sawyer & Brewster
                              One Financial Center
                              Boston, Massachusetts 02111

     Lessee:                  Alkermes, Inc.
                              64 Sidney Street
                              Cambridge, Massachusetts 02139
                              Attention:  Michael J. Landine,
                                          Chief Financial Officer

     Any notice, demand or other communication shall be effective upon receipt
     by or tender for delivery to the intended recipient thereof.

19.  NO WAIVERS. Failure of either Lessor or Lessee to complain of any act or
     omission on the part of the other, no matter how long the same may
     continue, shall not be deemed to be a waiver by such non-complaining party
     of any of its rights hereunder. No waiver by either Lessor or Lessee at any
     time, expressed or implied, of any breach of any provision of this Lease
     shall be deemed a waiver of a breach of any other provision of this Lease
     or a consent to any subsequent breach of the same or any other provision.
     No acceptance by Lessor of any partial payment shall constitute an accord
     or satisfaction but shall only be deemed a partial payment on account; nor
     shall any endorsement or statement on any check or any letter accompanying
     any check or payment be deemed an accord and satisfaction, and Lessor may
     accept such check or payment without prejudice to Lessor's right to recover
     the balance of such installment or pursue any other remedy available to
     Lessor in this Lease or at law or in equity.

20.  Lessor's Obligations.
     --------------------

     20.1 Generally. Lessor shall:
          ---------

          (a)  not obstruct in any manner any portion of the sidewalks or
               approaches to the Building or any portion of the Parking Area
               leased to Lessee hereunder;


                                       35
<PAGE>   39

          (b)  pay Lessee's reasonable expenses, including reasonable attorneys'
               fees, incurred in enforcing any obligations of Lessor under this
               Lease; and

          (c)  save Lessee harmless and indemnified from any loss, cost and
               expense (including, without limitation, reasonable attorney's
               fees) arising out of or relating to a claim of injury to any
               person or damage to any property while on the Premises, in the
               Building, on the Land or on the sidewalks or ways adjoining the
               Land occasioned by any omission, neglect or default of Lessor or
               any officer, agent, employee, servant, contractor or invitee of
               Lessor. The provisions of this paragraph (c) shall survive the
               expiration or termination of this Lease with respect to any claim
               arising prior to the last day of the Lease Term regardless of
               whether such claim is asserted prior to the last day of the Lease
               Term.

     20.2 LESSOR'S MAINTENANCE. Lessor shall maintain: (i) the structural
          components of the Building, (ii) the roof and exterior skin of the
          Building, and (iii) the Parking Area in good order, repair and
          condition, excepting only (a) damage by fire or other casualty or
          taking which Lessor is not otherwise required by the terms of this
          Lease to repair or restore, (b) reasonable wear and tear, or (c) the
          negligent acts or omissions or willful misconduct of Lessee, anyone
          claiming by, through or under Lessee, or any of the officers,
          employees, agents, servants, contractors or invitees of any of the
          foregoing. Notwithstanding the foregoing, any and all maintenance,
          repair or replacement required to be made to any of the structural
          components of the Building, or to the roof or the exterior skin of the
          Building or to the Parking Area by reason of (i) any of Lessee's Work,
          or any Alterations made by or on behalf of Lessee, or (ii) any act or
          omission of Lessee, anyone claiming by, through or under Lessee, or
          any of the officers, employees, agents, servants, contractors or
          invitees of any of the foregoing, shall be solely the responsibility
          of Lessee.

21.  Ground Leases; Mortgages.
     ------------------------

     21.1 RIGHTS OF GROUND LESSORS AND MORTGAGEES. No act or failure to act on
          the part of Lessor which would entitle Lessee under the terms of this
          Lease, or by law, to be relieved of Lessee's obligations hereunder or
          to terminate this Lease, shall result in a release

                                       36

<PAGE>   40

          or termination of such obligations or a termination of this Lease
          unless (i) Lessee shall have first given written notice to Lessor's
          ground lessors and mortgagees of record of the act or failure to act
          on the part of Lessor which Lessee claims as the basis of Lessee's
          rights; and (ii) such ground lessors and mortgagees, after receipt of
          such notice, have failed or refused to correct or cure the condition
          within a reasonable time thereafter, but nothing in this Lease shall
          be deemed to impose any obligation on any such ground lessor or
          mortgagee to correct or cure any such condition. No ground lessor
          shall be liable for the failure to perform any of the obligations of
          Lessor hereunder unless and until such ground lessor terminates its
          ground lease and takes possession of the Premises, nor shall any
          mortgagee be liable for the failure to perform any of the obligations
          of Lessor hereunder unless and until such mortgagee enters upon and
          takes possession of the Premises for purposes of foreclosure.

     21.2 LEASE SUBORDINATE. This Lease is and shall be subject and subordinate
          to any ground lease or mortgage now or hereafter on the Premises, and
          to all advances under any such mortgage and to all renewals,
          amendments, extensions and consolidations thereof, provided that the
          holder of such ground lessor's interest or mortgagee's interest enters
          into a non-disturbance and attornment agreement with Lessee which
          provides that in the event that such ground lessor or mortgagee
          succeeds to Lessor's interest hereunder, then, provided that Lessee is
          not in default hereunder beyond the cure period provided in this
          Lease, such party shall recognize and be bound by the terms of this
          Lease. In the event that any ground lessor or the holder of any
          mortgage succeeds to Lessor's interest in the Premises or any portion
          thereof, Lessee hereby agrees to attorn to such ground lessor or
          mortgagee. In confirmation of such subordination, Lessee shall execute
          and deliver promptly any certificate in recordable form that Lessor or
          any ground lessor or any mortgagee may reasonably request.
          Notwithstanding the foregoing provisions of this Section, the holder
          of any mortgage on the Premises may at any time subordinate its
          mortgage to this Lease by written notice to Lessee.

          Lessor hereby represents to Lessee that as of the date of this Lease,
          there are no mortgages or ground leases encumbering the Premises or
          any portion thereof.

                                       37

<PAGE>   41

22.  NOTICE OF LEASE; ESTOPPEL CERTIFICATES. Lessor and Lessee agree that this
     Lease shall not be recorded. However, upon the request of either party,
     Lessor and Lessee shall execute and acknowledge a Notice of Lease in
     mutually acceptable and recordable form.

     From time to time during the Lease Term, and without charge, either party
     shall, within fifteen (15) business days of request by the other, certify
     by written instrument duly executed and acknowledged, to the requesting
     party or to any person reasonably specified by the requesting party,
     regarding (a) the existence of any amendments or supplements to this Lease;
     (b) the validity and force and effect of this Lease; (c) the existence of
     any known default or Event of Default; (d) the existence of any offsets,
     counterclaims or defenses; (e) the Commencement Date and the expiration
     date of the Lease Term; (f) the amount of Rent due and payable and the date
     to which Rent has been paid; and (g) any other matter reasonably requested.

23.  HOLDING OVER. If Lessee occupies the Premises after the day on which the
     Lease Term expires (or the effective date of any earlier termination as
     herein provided) without having entered into a new lease thereof with
     Lessor, Lessee shall be a tenant-at-sufferance only, subject to all of the
     terms and provisions of this Lease at two and one-half (2 1/2) times the
     then-effective Basic Rent stated in Section 4.0 above. Such a holding over,
     even if with the consent of Lessor, shall not constitute an extension or
     renewal of this Lease. For purposes of this Section, the failure of Lessee
     to complete by the last day of the Lease Term or the effective date of any
     earlier termination as herein provided the "close-out" procedures required
     by the Nuclear Regulatory Commission or any other federal, state or local
     governmental agency having jurisdiction over the use of radioactive
     materials within the Premises shall constitute a holding over and subject
     Lessee to the provisions of this Section.

24.  FORCE MAJEURE. Neither Lessor nor Lessee shall be deemed to be in default
     hereunder (and the time for performance of any of their respective
     obligations hereunder other than the payment of money shall be postponed)
     for so long as the performance of such obligation is prevented by strike,
     lock- out, act of God, absence of materials or any other matter not
     reasonably within the control of the party which must perform the
     obligation (collectively, "Force Majeure").

25.  SIGNS. Lessee shall have the right to install up to two signs on the
     Building, identifying its name and business, provided that (i) Lessee shall
     obtain Lessor's reasonable prior written approval as to the location, size,
     shape and

                                       38

<PAGE>   42

     appearance of each sign, and as to the plans and specifications relating to
     such installation; (ii) Lessee shall install each such sign at its sole
     cost; (iii) Lessee shall, at its sole cost, obtain all licenses, permits
     and other governmental consents and approvals required by applicable Legal
     Requirements to install the signs; (iv) Lessee shall cause such
     installation to be done in a good and workmanlike manner and in accordance
     with all applicable Legal Requirements, the provisions of applicable
     insurance policies, and the requirements of all existing restrictions,
     easements and encumbrances of record affecting the Land; (v) Lessee shall,
     at its sole cost, maintain the signs in good operating condition and in
     accordance with all applicable Legal Requirements, the provisions of
     applicable insurance policies, and the requirements of all existing
     restrictions, easements and encumbrances of record affecting the Land; and
     (vi) Lessee shall, at its sole cost, remove the signs on or prior to the
     date on which the Lease Term expires or this Lease is terminated and
     restore the surface of the Land and/or the Building to the condition in
     which it was prior to the installation of the signs. Lessor shall cooperate
     with Lessee, at no cost to Lessor, in connection with the filing of any
     application with the City of Cambridge necessary to obtain approval of the
     signs as approved by Lessor.

     All work done by or on behalf of Lessee pursuant to this Section shall be
     subject to the requirements set forth in Section 12.0(f) above. Lessor may
     inspect such work at any time or times and shall promptly give notice to
     Lessee of any observed defects. Lessee shall indemnify, defend and hold
     harmless Lessor from and against any and all liability, damage, penalties
     or judgments and from and against any claims, actions, proceedings and
     expenses and costs in connection therewith, including reasonable attorneys'
     fees, resulting from any work performed by or on behalf of Lessee pursuant
     to this Section. Such signs shall be at Lessee's sole risk, and Lessor
     shall not have no responsibility to maintain any insurance on them or
     otherwise be responsible for any damage or destruction thereto.

26.  ENTIRE AGREEMENT. No oral statement or prior written matter shall have any
     force or effect. This Agreement shall not be modified or canceled except by
     writing subscribed to by all parties.

27.  APPLICABLE LAW, SEVERABILITY AND CONSTRUCTION. This Lease shall be governed
     by and construed in accordance with the laws of Massachusetts and, if any
     provisions of this Lease shall to any extent be invalid, the remainder of
     this Lease, and the application of such provisions in other

                                       39
<PAGE>   43

     circumstances, shall not be affected thereby. The titles of the several
     Sections contained herein are for convenience only and shall not be
     considered in construing this Lease. Whenever the singular is used and when
     required by the context it shall include the plural, and the neuter gender
     shall include the masculine and feminine. The Exhibits attached to this
     Lease are incorporated into this Lease by reference. This Lease may be
     executed in several counterparts, each of which shall be an original, but
     all of which shall constitute one and the same instrument. The term
     "Lessor" whenever used herein, shall mean only the owner at the time of
     Lessor's interest herein, and no covenant or agreement of Lessor, express
     or implied, shall be binding upon any person except for defaults occurring
     during such person's period of ownership nor binding individually upon any
     officer, director, employee, fiduciary, shareholder or any beneficiary
     under any trust, and the liability of Lessor, in any event, shall be
     limited to Lessor's interest in the Building. If Lessee is several persons
     or a partnership, Lessee's obligations are joint or partnership and also
     several. Unless repugnant to the context, "Lessor" and "Lessee" mean the
     person or persons, natural or corporate, named above as Lessor and as
     Lessee respectively, and their respective heirs, executors, administrators,
     successors and assigns.

28.  SUCCESSORS AND ASSIGNS. The terms, covenants and conditions of this Lease
     shall be binding upon and inure to the benefit of Lessor and Lessee and
     their respective successors and permitted assigns.

29.  SECURITY DEPOSIT. Lessee has deposited with Lessor contemporaneously with
     its delivery to Lessor of executed counterparts of this Lease $8,500.00
     (the "Security Deposit") as security for the full and faithful payment and
     performance by Lessee of its obligations under this Lease from and after
     the date of execution hereof by Lessee, and not as a prepayment of Rent.
     The Security Deposit shall be kept in a money market savings account
     separate from other funds of Lessor, and shall bear interest at the rate in
     effect from time to time on such account, which interest shall be paid to
     Lessee annually. Lessor may use the Security Deposit to cure any Event of
     Default by Lessee (whether occurring prior to the Rent Commencement Date
     hereunder or thereafter), and Lessee shall immediately pay to Lessor on
     demand, as Additional Rent, the amount so expended and such additional
     amount as is required to cause the Security Deposit to equal the amount of
     $8,500.00. Lessor shall assign the Security Deposit to any successor owner
     of the Building and thereafter Lessor shall have no further responsibility
     therefor. Upon the expiration (or

                                       40


<PAGE>   44

     earlier termination) of the Lease Term, Lessor shall inspect the Premises,
     make such deductions from the Security Deposit as may be required to cure
     any Event of Default by Lessee hereunder, and, if Lessee is not then in
     default hereunder, pay the balance of the Security Deposit, if any, to
     Lessee within thirty (30) days of such expiration or termination. If Lessee
     is in default hereunder at the time of such expiration or termination, then
     Lessor shall be entitled to retain so much of the Security Deposit as
     Lessor reasonably estimates to be Lessee's liability to Lessor hereunder
     and shall pay the balance, if any, to Lessee within such 30-day period.

30.  AUTHORITY. Lessee hereby represents and warrants to Lessor that Michael J.
     Landine has the authority to execute this Lease on behalf of Lessee. Lessee
     shall furnish to Lessor a certified copy of the resolution of the Board of
     Directors of Lessee ratifying Lessee's execution of the Lease promptly
     after the July 1993 Board meeting. Lessor shall furnish appropriate
     evidence of the authority of Lessor to enter into this Lease.

     WITNESS the execution hereof in multiple counterparts under seal the day
     and year first above written.


     LESSOR:                             MASSACHUSETTS INSTITUTE OF
                                         TECHNOLOGY


Date: July 28, 1993                      By: /s/ Philip A. Trussell
     ---------------------------------      -----------------------------------
                                            Philip A. Trussell,
                                            Director of Real Estate
                                            Hereunto duly authorized



     LESSEE:                                ALKERMES, INC.


Date: July 26, 1993                      By: /s/ Michael J. Landine
     ---------------------------------      -----------------------------------
                                            Michael J. Landine
                                             Chief Financial Officer
                                            Hereunto duly authorized

              

                                       41

<PAGE>   45



                                    EXHIBIT A

                                    PREMISES
                                    --------

                               See attached plan.





                                       A-1





<PAGE>   46







                                    EXHIBIT B

                                    THE LAND
                                    --------

                               See attached plan.






                                       B-1

<PAGE>   47

                                    EXHIBIT C

                                   WORK LETTER
                                   -----------

     This Work Letter is incorporated by reference into the Lease dated July 26,
1993 by and between Massachusetts Institute of Technology, as Lessor, and
Alkermes, Inc. as Lessee. Terms defined in or by reference in the Lease not
otherwise defined herein shall have the same meaning herein as therein.


1.   ADDITIONAL DEFINITIONS. Each of the following terms shall have the meaning
     stated immediately after it:

          CONSTRUCTION AUTHORIZATIONS. Collectively, all permits, licenses and
          other consents and approvals required from any governmental authority
          for the construction of Lessee's Work.

          LESSEE'S GENERAL CONTRACTOR. A general contractor selected by Lessee
          and approved in writing by Lessor, who will be engaged by Lessee to
          construct Lessee's Work.

          LESSEE'S WORK. All improvements, alterations and additions which
          Lessee wishes to make to the Premises as part of the initial
          preparation thereof for Lessee's occupancy.

          WORKING DRAWINGS. The working drawings and specifications for Lessee's
          Work, to be prepared by Lessee and Lessee's architect in accordance
          with this Work Letter. The Working Drawings shall be prepared in
          compliance with all applicable Legal Requirements and stamped by
          registered Massachusetts professionals, and shall consist of all
          architectural and engineering plans and specifications which are
          required to finish the Premises or to obtain any Construction
          Authorization required therefor.

2.   PREPARATION OF THE PREMISES. Lessor is leasing the Premises to Lessee in
     its "as is" condition, and Lessor shall have no obligation to perform any
     repairs or make any improvements to the Premises in anticipation of
     Lessee's occupancy thereof. Lessee shall perform Lessee's Work at Lessee's
     sole cost and expense.

     Prior to the commencement of any design work on Lessee's Work, Lessee shall
     provide to Lessor an original certificate of insurance, in customary form,
     for each architect and

                                       C-1

<PAGE>   48

     engineer retained by Lessee in connection with the design and/or
     construction of Lessee's Work, which certificate shall evidence a current
     "errors and omissions" insurance policy as in effect, in an amount
     reasonably acceptable to Lessor. Prior to the commencement of the
     construction of Lessee's Work, Lessee shall provide to Lessor an original
     certificate of insurance for the general contractor (or, if no general
     contractor is used, each trade contractor) employed by Lessee in connection
     with the construction of Lessee's Work, which certificate shall evidence a
     current general liability insurance policy as in effect, in an amount
     reasonably acceptable to Lessor, naming Lessor as an additional insured.

3.   WORKING DRAWINGS. Lessee shall be solely responsible for the preparation
     and completion of all preliminary and final Working Drawings. Lessee shall
     retain its own architects and engineers to prepare Working Drawings,
     provided that Lessor first approves such engineers and architects so
     selected by Lessee, which approval shall not be unreasonably withheld or
     delayed. Lessee shall provide copies of the preliminary Working Drawings to
     Lessor, together with a list of elements of Lessee's Work which Lessee
     intends to remove from the Premises upon the expiration or earlier
     termination of this Lease. Lessor shall provide to Lessee within ten (10)
     business days thereafter a list of corrections and modifications which
     Lessor requires to be made to the Working Drawings. Lessor shall also
     provide to Lessee within such 10-business day period a list of those
     elements of Lessee's Work which Lessee must remove at the expiration or
     earlier termination of this Lease.

     Lessee shall revise the preliminary Working Drawings to incorporate the
     corrections and modifications requested by Lessor and shall submit final
     Working Drawings to Lessor for its approval. Lessor shall review the final
     Working Drawings and, within ten (10) business days after receipt thereof,
     Lessor shall either (a) notify Lessee that Lessor has approved the final
     Working Drawings, or (b) provide to Lessee a list of corrections and
     modifications which Lessor requires to be made to the Working Drawings.
     Lessor shall also provide to Lessee within such 10-business day period a
     supplementary list of those elements of Lessee's Work which Lessee must
     remove at the expiration or earlier termination of this Lease (if any). In
     the event Lessor returns the Working Drawings to Lessee for correction or
     modification, Lessee shall diligently correct the Working Drawings and
     resubmit them to Lessor for approval pursuant to the preceding provisions
     of this paragraph. No work shall be performed until final Working Drawings
     have been approved in writing by Lessor.

                                       C-2

<PAGE>   49

     The review and/or approval by Lessor or its architect or engineers of any
     plans, sketches or Working Drawings submitted by Lessee relating to
     Lessee's Improvements shall not (i) constitute an opinion or representation
     by Lessor that the same are in compliance with all applicable Legal
     Requirements and the provisions of all applicable insurance policies or as
     to the feasibility of constructing the work shown thereon, or (ii) impose
     on Lessor any responsibility for a design defect, it being agreed that all
     such responsibility shall remain solely with Lessee.

     Lessee shall reimburse Lessor promptly upon demand therefor for all
     out-of-pocket costs and expenses reasonably incurred by Lessor in
     connection with the review by Lessor's architect, engineer or other
     consultant (but not for Lessor's "in-house" review) of any plans, drawings
     and specifications submitted by Lessee pursuant to this Work Letter, which
     reimbursement shall be due and payable as Additional Rent.

4.   LESSEE'S GENERAL CONTRACTOR. Lessee shall obtain the prior reasonable
     written approval of Lessor as to Lessee's General Contractor.

5.   LESSEE'S WORK. Lessee shall be solely responsible for obtaining all
     Construction Authorizations required for Lessee's Work. Promptly after
     receiving the same, Lessee shall cause Lessee's General Contractor to
     commence construction and diligently to proceed to completion thereof. All
     construction shall be performed in a good and workmanlike manner, using new
     materials and in compliance with the Working Drawings, the Construction
     Authorizations, all Legal Requirements, and the provisions of all
     applicable insurance policies.

6.   DELAYS. No delays in the preparation of preliminary drawings, plans or
     specifications, or in the preparation of Working Drawings, or in the
     performance and completion of Lessee's Work, regardless of the cause
     thereof, shall affect the Commencement Date or the Rent Commencement Date.

     A breach of any provision of this Work Letter shall constitute a default
     under the Lease, for which Lessor shall have all remedies therein provided.

7.   LESSOR'S AND LESSEE'S REPRESENTATIVES. Prior to the commencement of any
     design work for the Premises, each party hereto shall designate in writing
     to the other a person as "Lessor's Representative" and "Lessee's
     Representative" respectively, which person shall be available during
     ordinary business hours to review the progress of the work

                                       C-3

<PAGE>   50

     and to respond to issues which arise during construction. Each party may
     rely on the other's Representative with respect to all matters which
     pertain to this Work Letter, each party having authorized its
     Representative to make decisions binding upon such party with respect to
     such matters.




                                       C-4





<PAGE>   51






                                    EXHIBIT D

                       FORM OF COMMENCEMENT DATE AGREEMENT
                       -----------------------------------

     This Exhibit is incorporated by reference into the Lease dated July 26,
1993 by and between Massachusetts Institute of Technology, as Lessor, and
Alkermes, Inc. as Lessee.


                           COMMENCEMENT DATE AGREEMENT
                           ---------------------------
 
     THIS COMMENCEMENT DATE AGREEMENT is made this __ day of ________, 199_ by
and between MASSACHUSETTS INSTITUTE OF TECHNOLOGY ("Lessor") and ALKERMES, INC.
("Lessee"). Reference is made to a Lease between Lessor and Lessee dated July
26, 1993 (the "Lease"), pursuant to which Lessor leased to Lessee a portion of
the building located at 281 Albany Street, as more particularly described in the
Lease (the "Premises"). Capitalized terms used in this Commencement Date
Agreement which are defined in the Lease and not otherwise defined herein shall
have the same meaning herein as therein.

     For good and valuable consideration, the receipt and sufficiency of which
are hereby acknowledged, Lessor and Lessee hereby agree that the Commencement
Date for all purposes of the Lease is _______________________________, and that
the last day of the Initial Lease Term is ___________________.

     WITNESS the execution hereof under seal the day and year first above
written.


     LESSOR:                             MASSACHUSETTS INSTITUTE OF
                                         TECHNOLOGY


                                         By: 
                                            ------------------------------------
                                            Philip A. Trussell,
                                            Director of Real Estate
                                            Hereunto duly authorized

                                         Date: ______________, 199_


     LESSEE:                             ALKERMES, INC.


                                         By: 
                                            ------------------------------------
                                            Name:
                                            Title:
                                            Hereunto duly authorized

                                         Date: ______________, 199_

         


                                       D-1


<PAGE>   1
                                                                Exhibit 10.8(a)

                            FIRST AMENDMENT TO LEASE
                            ------------------------


     THIS FIRST AMENDMENT TO LEASE is made as of the 9th day of June, 1997 by
and between MASSACHUSETTS INSTITUTE OF TECHNOLOGY, a Massachusetts educational
corporation with an address of 238 Main Street, Cambridge, Massachusetts 02142
("Lessor"), and ALKERMES, INC., a Pennsylvania corporation with an address of 64
Sidney Street, Cambridge, Massachusetts 02139 ("Lessee").

     Reference is made to a lease dated July 26, 1993 by and between Lessor and
Lessee (the "Original Lease"), concerning certain premises located at 281 Albany
Street, Cambridge, Massachusetts, as more particularly described in the Lease.
As used in the Original Lease or in this Amendment, the term "Lease" shall mean
the Original Lease as amended hereby.

     Lessee desires to extend the Lease Term, to expand the premises demised to
it pursuant to the Original Lease, and to provide for an option to expand the
Building. Lessor is willing to agree to the foregoing subject to the terms and
conditions of the Original Lease, as hereby amended.

     FOR GOOD AND VALUABLE CONSIDERATION, the receipt and legal sufficiency of
which are hereby acknowledged, Lessor and Lessee hereby agree to amend the
Original Lease as follows:

     1. DEFINITIONS. Capitalized terms used in this Amendment which are defined
in the Original Lease and not otherwise defined herein shall have the same
meaning in this Amendment as in the Original Lease. The following terms shall
have the meanings set forth below:

          ADDITION WORK. As defined in the Supplementary Work Letter.

          ADJACENT BUILDING. The building currently existing on the Adjacent
          Land.

          ADJACENT LAND. That certain parcel of land adjoining the Land, known
          as and numbered 295 Albany Street, Cambridge, Massachusetts.

          ADJACENT PREMISES. Collectively, the Adjacent Land and the Adjacent
          Building.

          BASIC RENT. As defined in Paragraph 4 below.


<PAGE>   2

          BROKER. Meredith & Grew, Inc.

          BUILDING ADDITION. An addition to the Building to be constructed by
          Lessor and Lessee on the Adjacent Land, subject to the terms and
          conditions of this Amendment.

          BUILDING ADDITION OPTION. The option on the part of Alkermes, Inc. to
          cause Lessor to construct the shell of the Building Addition (or to
          construct the entire Building Addition itself), subject to the terms
          and conditions of this Amendment. The Building Addition Option shall
          be personal to Alkermes, Inc. and may not be exercised by any
          sublessee, assignee or successor of or to Alkermes, Inc.

          BUILDING ADDITION RENT COMMENCEMENT DATE. As defined in the
          Supplementary Work Letter.

          EXPANSION PREMISES. The entire second floor of the Building,
          containing approximately 6,500 rentable square feet.

          EXPANSION PREMISES COMMENCEMENT DATE. July 1, 1997.

          EXPANSION WORK. As defined in the Supplementary Work Letter.

          EXTENSION TERM. As defined in Paragraph 3(b) below.

          INITIAL LEASE TERM. As defined in Paragraph 3(a) below.

          INITIAL PREMISES. The first floor of the Building, as described in
          Section 1.0 of the Original Lease.

          LEASE TERM. Collectively, (i) the Initial Lease Term and (ii) the
          Extension Term (if Lessee duly exercises the Extension Option).

          LESSEE'S ADDITION WORK. As defined in the Supplementary Work Letter.

          LESSEE'S WORKING DRAWINGS. As defined in the Supplementary Work
          Letter.

          LESSOR'S ADDITION WORK. As defined in the Supplementary Work Letter.


                                        2

<PAGE>   3

          LESSOR'S WORKING DRAWINGS. As defined in the Supplementary Work
          Letter.

          NOTICE DATE. As defined in Paragraph 5(b) below.

          SUPPLEMENTARY WORK LETTER. The Supplementary Work Letter attached
          hereto as Exhibit I.

2.   PREMISES. Effective on the Expansion Premises Commencement Date: 
     (a) Lessee shall lease the Expansion Premises, subject to all of the terms
     and conditions of the Lease, (b) the term "Premises" as used in the
     Original Lease shall mean and include both the Initial Premises and the
     Expansion Premises, and (c) the Expansion Premises shall be considered to
     be part of the Premises for all purposes of the Lease. The expansion of the
     Premises described in the preceding sentence of this Paragraph shall be
     deemed an exercise in full of Lessee's Expansion Option set forth in
     Section 2.0 of the Lease, and Section 2.0 of the Lease shall thereafter be
     null and void and of no further force or effect.

     The Expansion Premises shall be delivered by Lessor to Lessee broom clean,
     but otherwise in the condition in which the same are redelivered to Lessor
     by the current occupant thereof. Lessor shall have no obligation to perform
     any work in or to the Expansion Premises.

3.   INITIAL LEASE TERM; EXTENSION TERM; LEASE TERM. (a) Section 3.1 of the
     Original Lease is hereby amended by deleting therefrom the first sentence
     in its entirety and substituting therefor the following:

          "The initial term of this Lease (the "Initial Lease Term") shall
          commence on August 15, 1993 and shall expire, unless sooner terminated
          as hereinafter provided, on August 14, 2008; PROVIDED, HOWEVER, that
          if Lessee duly exercises the Building Addition Option and the Building
          Addition is constructed as provided in Paragraph 15 below, then the
          Initial Lease Term shall automatically be further extended as of the
          Building Addition Rent Commencement Date to the date which is the
          earlier of (i) the day immediately preceding the tenth (10th)
          anniversary of the Building Addition Rent Commencement Date, or (ii)
          August 14, 2013."


                                        3

<PAGE>   4

     (b)  Section 3.2 of the Original Lease is hereby amended as follows:

          (i)  The "Extension Term" shall be the period commencing on the day
               after the last day of the Initial Lease Term and expiring on
               August 14, 2013, unless sooner terminated as provided in the
               Lease;

          (ii) In the second paragraph of said Section 3.2, line 4, the number
               in parenthesis shall be changed from "18" to "15"; and

         (iii) The table appearing at the top of page 4 of the Original Lease
               is hereby deleted.

4.   BASIC RENT. Effective on the Expansion Premises Commencement Date, Section
     4.1(a) of the Original Lease shall be deleted in its entirety and the
     following substituted therefor:

     "(a) Basic rent ("Basic Rent"), which term shall mean, collectively, the
     sums identified in the following subparagraphs (i) and (ii):

     "(i) with respect to the Initial Premises and the Expansion Premises:

          (w)  for the period commencing on July 1, 1997 and ending on August
               14, 1998, the sum of $141,000.00 per Lease Year (PRO-RATED for
               partial Lease Years), payable in equal monthly installments of
               $11,750.00;

          (x)  for the period commencing on August 15, 1998 and ending on August
               14, 2003, the sum of $192,000.00 per Lease Year, payable in equal
               monthly installments of $16,000.00;

          (y)  for the period commencing on August 15, 2003 and ending on August
               14, 2008, the sum of $232,000.00 per Lease Year, payable in equal
               monthly installments of $19,333.33; and

          (z)  for the Extension Term, if any, the "Fair Market Rent" of the
               Initial Premises and the Expansion Premises, determined in
               accordance with the provisions of Section 4.2 below;

                                        4

<PAGE>   5

     PROVIDED, HOWEVER, that if Lessee duly exercises the Building Addition
     Option and the Initial Lease Term is consequently extended as provided in
     Section 3.1 of the Lease, then notwithstanding anything to the contrary set
     forth in the preceding provisions of this Section 4.1(a), Basic Rent for
     the Initial Premises and the Expansion Premises for the portion of the
     Initial Lease Term commencing on August 15, 2008 shall be the Fair Market
     Rent of the Initial Premises and the Expansion Premises as of August 15,
     2008, determined in the manner provided in Section 4.2 of the Lease.

     "(ii) With respect to the Building Addition and the Adjacent Land (as
     hereinafter defined), for the period commencing on the Building Addition
     Rent Commencement Date and continuing for the remainder of the Lease Term,
     the following amount per Lease Year:

          (x)  if Lessor performs Lessor's Addition Work, an amount equal to
               twelve (12%) percent of the sum of (1) the aggregate amount of
               Lessor's actual out-of-pocket costs incurred in (a) demolishing
               the Adjacent Building, (b) preparing the Adjacent Land for
               construction of the Building Addition, (c) obtaining the permits,
               licenses, consents and approvals from governmental authorities
               for Lessor's Addition Work, (d) preparing Lessor's Working
               Drawings for Lessor's Addition Work, and (e) constructing
               Lessor's Addition Work (both "hard costs" and "soft costs"), and
               (2) Three Hundred Seventy Thousand Dollars ($370,000.00) (on
               account of the Adjacent Land); or

          (y)  if Lessee performs Lessor's Addition Work at its sole cost and
               expense, an amount equal to twelve (12%) percent of the sum (1)
               the aggregate amount of Lessor's actual out-of pocket costs
               incurred in (a) demolishing the Adjacent Building, and (b)
               preparing the Adjacent Land for construction of the Building
               Addition, and (2) Three Hundred Seventy Thousand Dollars
               ($370,000.00) (on account of the Adjacent Land).

     "Basic Rent shall be due and payable in equal monthly installments, in
     advance, without offset or deduction, and without previous demand therefor,
     commencing (x) with respect to the Initial Premises, on the Commencement
     Date, (y) with respect to the Expansion Premises, on

                                        5


<PAGE>   6

     the Expansion Premises Commencement Date, and (z) with respect to the
     Building Addition, on the Building Addition Rent Commencement Date, and in
     each case continuing on the first day of each calendar month or portion
     thereof during the Lease Term. If the Expansion Premises Commencement Date
     or the Building Addition Rent Commencement Date is other than the first day
     of a calendar month, Basic Rent for the Expansion Premises or the Building
     Addition (as the case may be) shall be PRO-RATED for such month. Basic Rent
     shall also be PRO-RATED for a partial month occurring at the end of the
     Lease Term."

5.   FAIR MARKET RENT. (a) For purposes of determining "Fair Market Rent"
     pursuant to Section 4.2 of the Lease, all improvements to the Premises or
     the Building which are funded, in the first instance, by Lessor pursuant to
     this Amendment, regardless of whether Lessee makes payments to Lessor on
     account thereof pursuant to Paragraph 4 above, shall be deemed to be
     "improvements made by Lessor" and shall be included in determining Fair
     Market Rent.

     (b) The first three sentences of the second paragraph of Section 4.2 are
     hereby deleted in their entirety and the following are substituted
     therefor:

          "If Lessee duly exercises the Extension Option as provided in Section
          3.2 of the Lease, then within twenty (20) days after Lessor receives
          Lessee's notice of exercise of the Extension Option, Lessor shall
          provide to Lessee Lessor's good faith determination of the Fair Market
          Rent of the Initial Premises and the Expansion Premises as of the
          first day of the Extension Term. If Lessee duly exercises the Building
          Addition Option as provided in Paragraph 15 of this Amendment and the
          Building Addition is constructed and the Initial Lease Term extended
          as provided in Section 3.1 of the Lease, then Lessor shall provide to
          Lessee not later than April 1, 2008 Lessor's good faith determination
          of the Fair Market Rent of the Initial Premises and the Expansion
          Premises as of August 15, 2008. The date on which Lessor provides such
          determination is hereinafter referred to as the "Notice Date". If
          Lessor and Lessee are unable to agree on such Fair Market Rent within
          thirty (30) days after the Notice Date, then Lessor and Lessee shall,
          not later than sixty (60) days after the Notice Date, each retain a
          real estate appraiser with at least ten (10) years' continuous
          experience in

                                        6

<PAGE>   7

          the business of appraising or marketing commercial real estate in the
          Cambridge, Massachusetts vicinity, who shall, within sixty (60) days
          of his or her selection, prepare a written report summarizing his or
          her conclusion as to Fair Market Rent. Lessor and Lessee shall
          simultaneously exchange such reports; PROVIDED, HOWEVER, that if one
          party has not obtained such a report within one hundred thirty (130)
          days after the Notice Date, then the determination set forth in the
          other party's report shall be final and binding upon the parties."

     (c) All references to the "Expansion Premises" in Section 4.2 of the Lease
     shall be deemed to refer to the Initial Premises and the Expansion Premises
     together.

6.   PRELIMINARY ENTRY. Section 4.3, PRELIMINARY ENTRY, is hereby amended as
     follows:

     (a) All references in such Section to the "Commencement Date" shall be
     deemed to mean and refer to the "Expansion Premises Commencement Date"; and

     (b) The third sentence thereof is deleted in its entirety.

7.   DISCONTINUED OCCUPANCY. For purposes of calculating the Termination Payment
     as provided in Section 5.0 of the Original Lease, the costs incurred by
     Lessee in connection with the design and construction of the Expansion Work
     and Lessee's Addition Work shall be amortized on a straight-line basis over
     ten (10) years rather than the 5-year period stated in the Original Lease,
     with such amortization period commencing on the first day of the first
     calendar month commencing after the day on which such work is substantially
     completed (i.e., completed except for items of work which are not necessary
     to make the Building or the Building Addition (as the case may be)
     reasonably useable for the Permitted Uses and which, because of season or
     weather or nature of the item, cannot practicably be done at that time).

8.   TAXES. (a) Section 6.1 of the Original Lease is hereby amended by adding
     the following sentence to the end thereof as it appears in the Original
     Lease:


                                        7

<PAGE>   8

          "Notwithstanding anything to the contrary contained in this Lease,
          provided that Lessee makes all payments to Lessor on account of Taxes
          hereunder within the time specified in this Lease, "Taxes" shall not
          include any interest, penalties or other charges assessed against
          Lessor on account of Lessor's failure to pay Taxes on a timely basis
          to the taxing authority."

     (b) Effective on the Expansion Premises Commencement Date, "Lessee's Share"
     as defined in Section 6.2 of the Lease shall be one hundred percent (100%),
     and Lessee shall be responsible for the payment of all Taxes relating to
     the Premises, the Building or the Land, which payments shall be made to
     Lessor in the manner provided in Section 7 of the Lease.

     (c) Effective on the Expansion Premises Commencement Date, Lessee's
     pro-rata share of Taxes with respect to each of the Off-Site Lots in which
     are located any of the parking spaces leased by Lessee pursuant to Section
     10 of the Lease shall be adjusted to reflect the number of parking spaces
     then leased by Lessee pursuant to said Section 10.

     (d) Effective on the Expansion Premises Commencement Date, Section 6.3,
     ABATEMENT OF TAXES, is hereby amended as follows:

          (i)  The first paragraph shall be deleted in its entirety; and

          (ii) The first sentence of the second paragraph shall be deleted and
               the following substituted therefor:

               "Lessee shall have the right to file an application for the
               abatement of Taxes with respect to the Land and/or the Building
               provided that Lessee gives notice of such filing to Lessor
               (together with a copy of such abatement application) promptly
               after such application is filed."

9.   UTILITIES AND SERVICES. Effective on the Expansion Premises Commencement
     Date, Section 7.0 of the Original Lease is hereby amended by deleting the
     second paragraph thereof in its entirety and substituting therefor the
     following:


                                        8
<PAGE>   9

          "The only services which Lessor shall provide to the Premises, the
          Building or the Land during the Lease Term (collectively, "Lessor's
          Services") shall be: (i) maintaining the alarm and sprinkler systems,
          and (ii) snowplowing, paving, striping and general maintenance of the
          parking lots in which are located parking spaces leased by Lessee
          pursuant to Section 10.0 below. Lessee's obligation to make payments
          on account of such snowplowing, paving, striping and general
          maintenance of such parking lots shall be PRO-RATED in the manner
          provided in Section 10.0 of this Lease. Lessee shall continue to pay
          to Lessor as Additional Rent the property management fee paid by
          Lessor (if any) in connection with the Premises, which fee shall not
          exceed four (4%) percent of the gross rental revenue of the Premises."

10.  INSURANCE. Section 8.2, CASUALTY INSURANCE, is hereby amended by inserting
     into the seventh line thereof after the phrase "as their respective
     interests may appear", the phrase "but naming Lessee as loss payee".

11.  ASSIGNMENT AND SUBLETTING. Section 9.0(c) is hereby amended by deleting
     therefrom clause (iii) in its entirety, and substituting therefor the
     following:

          "(iii) Lessee shall pay to Lessor, as Additional Rent, immediately
          upon receipt thereof by Lessee, one-half (1/2) of the amount by which
          the aggregate rent and other amounts payable to Lessee under or in
          connection with such assignment or sublease, after deduction of (A)
          the costs reasonably incurred by Lessee in entering into such
          assignment or sublease (including, without limitation, reasonable
          attorneys' fees and expenses, brokerage commissions, alteration costs,
          and tenant concessions (such as free rent) granted by Lessee, all
          amortized on a straight-line basis over the term of such sublease or,
          in the case of an assignment, over the remaining Lease Term of this
          Lease), and (B) the monthly amount of the unamortized portion of the
          actual out-of-pocket costs reasonably incurred by Lessee in
          constructing those portions of the Expansion Work or Lessee's Addition
          Work which are permanently affixed to and

                                        9


<PAGE>   10

          integrated into the structure of the Building or Building systems, for
          the term of such sublease (or in the case of an assignment, for the
          remainder of the Lease Term) determined on the basis of straight line
          amortization of such costs over a period of 10 years (and in the case
          of a sublease, then allocated on a PRO-RATA square footage basis to
          the portion of the Premises subject to such sublease), exceeds the
          Rent payable hereunder with respect to the portion of the Premises
          subject to such sublease (or, in the case of an assignment, the entire
          Premises). In the case of a sublease, unless otherwise agreed to in
          writing by Lessor at the time that it consents to such sublease, the
          calculation described in clause (iii) of the immediately preceding
          sentence shall be performed on a monthly basis and payment shall be
          made to Lessor on the basis of such monthly calculation. All separate
          charges reasonably imposed by Lessee upon such sublessee or assignee
          for the purchase of or use of equipment owned by Lessee which is not
          permanently affixed to and integrated into the structure of the
          Building or Building systems shall be excluded from the calculation
          described in clause (iii). Notwithstanding anything to the contrary
          herein contained, no assignee, sublessee or successor of or to
          Alkermes, Inc. shall have the right to exercise the Building Addition
          Option, which option is personal to and may only be exercised by
          Alkermes, Inc."

12.  PARKING. Section 10.0, PARKING, is hereby amended by deleting therefrom the
     third paragraph in its entirety and substituting therefor the following:

          "Commencing on August 14, 1998, Lessee shall pay, as Additional Rent,
          on the same day on which Basic Rent is due and payable hereunder, rent
          on account of each parking space leased by Lessee at the then-fair
          market rent thereof, which amount may be adjusted by Lessor from year
          to year."

13.  CONSTRUCTION; WORK LETTER. (a) Article 13.0, CONSTRUCTION, is hereby
     deleted in its entirety.

          (b) The Work Letter attached to the Original Lease as EXHIBIT C is
          hereby deleted in its entirety and the Supplementary Work Letter
          attached to this Amendment as EXHIBIT I is substituted therefor. All

                                       10

<PAGE>   11

          references in the Lease to the "Work Letter" shall be deemed to refer
          to the Supplementary Work Letter.

14.  EXPANSION WORK: Lessee may, at its sole cost and expense and in accordance
     with the provisions of the Supplementary Work Letter, make certain
     improvements to the Initial Premises and the Expansion Premises in
     connection with Lessee's initial occupancy of the Expansion Premises. All
     of the "Expansion Work" (as defined in the Supplementary Work Letter) shall
     be deemed to be part of "Lessee's Work" as that term is used in the Lease.
     Lessor shall have no obligation to (x) prepare any Working Drawings, (y)
     perform any work, or (z) make any contribution to Lessee, in connection
     with the design or construction by Lessee of the Expansion Work. All of the
     Expansion Work shall be finally completed by January 1, 1999, subject to
     the provisions of Section 24.0 (Force Majeure) of the Lease.

15.  CONSTRUCTION OF BUILDING ADDITION. (a) Lessor owns the Adjacent Premises.
     The Adjacent Building is currently leased by Lessor to a third party, who,
     in turn, has subleased it to Cambridge Bottle and Can. Lessor hereby
     represents and warrants to Lessee that the term of the lease currently in
     effect with respect to the Adjacent Building expires on June 30, 1999.
     Lessor hereby agrees that it shall not extend nor renew the existing lease
     of the Adjacent Premises or enter into any other lease or tenancy agreement
     relating to the Adjacent Premises until the first to occur of (i) receipt
     by Lessor of a written waiver from Lessee of its right to exercise the
     Building Addition Option, or (ii) Lessee's failure to exercise the Building
     Addition Option in accordance with the requirements of this Paragraph 15.

     (b)  Provided that:

          (i)  as of the day on which Lessee gives "Lessee's Exercise Notice"
               (as hereinafter defined), (A) no Event of Default is then
               continuing and (B) Alkermes, Inc. is actually occupying at least
               twenty-five (25%) percent of the Premises; and

          (ii) (A) Lessee's net worth as set forth in the 10-Q report most
               recently prepared by Lessee immediately prior to the date on
               which Lessee gives Lessee's Exercise Notice to Lessor is not less
               than Lessee's net worth as set forth

                                       11

<PAGE>   12

               in the 10-Q report most recently prepared by Lessee immediately
               prior to the date of this Amendment, and (B) the amount of
               unrestricted cash or cash equivalents then held by Lessee as of
               the date on which Lessee gives Lessee's Exercise Notice, together
               with the amount of financing then available to Lessee, exceeds
               the amount reasonably estimated by Lessor to be required by
               Lessee for (x) operation of Lessee's business for one (1) year as
               it is then being operated, plus (y) the costs to be incurred by
               Lessee in designing and constructing the Building Addition,

     then Lessee (which term shall mean, in connection with the Building
     Addition Option, only Alkermes, Inc., and not any sublessee, assignee or
     successor of or to Alkermes, Inc.) shall have the right to exercise the
     Building Addition Option by giving to Lessor not later than August 15, 2001
     written notice of such exercise ("Lessee's Exercise Notice").


     If Lessee duly exercises the Building Addition Option in accordance with
     the foregoing terms and conditions, then such exercise shall (i) be
     irrevocable except as expressly provided in Paragraph 7 of the
     Supplementary Work Letter, (ii) constitute the agreement of Lessee to
     perform at its sole cost and expense Lessee's Addition Work in accordance
     with the terms and conditions of this Amendment, and (iii) subject to the
     provisions of subparagraph 15(g) below and Paragraph 7 of the Supplementary
     Work Letter, require Lessor to perform at its sole cost and expense
     Lessor's Addition Work in accordance with the terms and conditions of this
     Amendment.

     (c) If Lessee duly exercises the Building Addition Option, then (i) from
     and after such exercise Lessor shall not enter into any further leases or
     tenancy agreements relating to the Adjacent Premises, (ii) promptly after
     receiving such notice of exercise, Lessor shall (x) terminate any tenancies
     or occupancies affecting the Adjacent Premises (if any) and make diligent
     efforts to obtain possession of the Adjacent Premises from the tenants and
     occupants thereof, and (y) at its sole cost and expense, subject to the
     terms and conditions of this Amendment, demolish and remove all structures
     on the Adjacent Land down to foundations, and level the surface of the
     Adjacent Land such that such demolition and removal is completed within six
     (6) months after Lessee's exercise of the Building Addition Option. Lessor
     shall

                                       12

<PAGE>   13

     notify Lessee when such demolition and site levelling have been completed.
     From and after the date on which such work is completed:

          (1)  Lessee shall be responsible for paying to Lessor, as Additional
               Rent, all Taxes (as defined in the Lease) assessed or imposed
               upon the Adjacent Land, which payments shall be made in the same
               manner and at the same times as Taxes are paid by Lessee pursuant
               to Section 6.0 of the Lease; and

          (2)  Unless and until construction of the Building Addition commences
               on the Adjacent Land pursuant to the provisions of this
               Amendment, Lessor shall have the right to make any use of the
               surface of the Adjacent Land, including, without limitation,
               parking of automobiles (and Lessor may, at its sole cost and
               expense, pave the surface of all or portions of the Adjacent
               Land), but Lessor shall not construct any buildings or structures
               on the Adjacent Land. If Lessor does make use of the Adjacent
               Land as provided in this subparagraph (2), then for such time as
               Lessor continues to make such use of the Adjacent Land Lessor
               shall (A) be solely responsible for maintaining any pavement laid
               by Lessor on the Adjacent Land and (B) save Lessee harmless and
               indemnified from any loss, cost and expense (including, without
               limitation, reasonable attorney's fees) arising out of or
               relating to a claim of injury to any person or damage to any
               property while on the Adjacent Land unless occasioned by any
               omission, neglect or default of Lessee or any officer, agent,
               employee, servant, contractor or invitee of Lessee or anyone
               claiming by, through or under Lessee.

     (d) If at any time after Lessee duly exercises the Building Addition
     Option, an Event of Default occurs, then in addition to any other rights
     and remedies of Lessor hereunder, Lessor shall be entitled to cease the
     design or construction of Lessor's Addition Work.

     (e) In addition to the foregoing provisions of this Paragraph 15, the
     design and construction of the Building Addition shall be governed by the
     provisions of the Supplementary Work Letter.

                                       13

<PAGE>   14

     (f) From and after the date on which Lessee exercises the Building Addition
     Option, (i) the Adjacent Land shall be deemed to be part of the Land for
     all purposes of the Lease (subject to the rights and obligations of Lessor
     as set forth in subparagraph 15(c)(2) above), and (ii) all obligations of
     Lessee under the Lease with respect to the Land, the Building or the
     Premises shall apply equally to the Land and the Building Addition (except
     that no Rent shall be due or payable hereunder in connection with the
     Building Addition until the Building Addition Rent Commencement Date except
     as otherwise specifically provided in Paragraph 15(c) above). From and
     after the Building Addition Rent Commencement Date, (i) the Building
     Addition shall be deemed to be part of the Building and the Premises for
     all purposes of the Lease, and (ii) Basic Rent shall be due and payable on
     account of the Building Addition and the Adjacent Land as provided in
     Section 4.1(a)(ii) of the Lease.

     (g) Notwithstanding anything to the contrary contained in this Paragraph
     15, Lessee shall have the right, by written notice given to Lessor either
     (i) prior to the commencement of design work by Lessor on Lessor's Addition
     Work, or (ii) as provided in Paragraph 7 of the Supplementary Work Letter,
     to design and perform Lessor's Addition Work at Lessee's sole cost and
     expense, in which event (w) "Lessor's Addition Work" shall be deemed to be
     part of "Lessee's Addition Work" as that term is used in this Amendment,
     (x) "Lessor's Addition Work" shall be deemed to be part of "Lessee's Work"
     as that term is used in the Original Lease, (y) Lessor shall have no
     obligation to (1) prepare any Working Drawings, (2) perform any work, or
     (3) incur any costs in connection with the design or construction of the
     Building Addition (other than costs associated with Lessor's review of
     Lessee's Working Drawings), and (z) all references in the Supplementary
     Work Letter to "Lessee's Addition Work" shall be deemed to include and
     refer to "Lessor's Addition Work".

     (h) Notwithstanding anything to the contrary contained in this Amendment,
     Lessee shall have the right to rescind its exercise of the Building
     Addition Option in the circumstances described in Paragraph 7 of the
     Supplementary Work Letter. If Lessee so rescinds its exercise of the
     Building Addition Option, then effective upon the date of such rescission
     (i) the Adjacent Land shall no longer be deemed to be part of the Land
     subject to the Lease, and (ii) Lessee shall have no

                                       14

<PAGE>   15

     obligation to pay Taxes assessed or imposed upon the Adjacent Land for any
     period beyond such effective date.

16.  REAL ESTATE BROKER. Lessor and Lessee each represent to the other that they
     have dealt with no broker in connection with this First Amendment to Lease
     other than the Broker. Lessor shall pay the Broker as part of a separate
     agreement. Lessee agrees to indemnify and hold Lessor harmless from and
     against any claims for commissions or fees by any person other than the
     Broker arising from a breach by Lessee of the foregoing representation.
     Lessor agrees to indemnify and hold Lessee harmless from and against any
     claims for commissions or fees by the Broker or any other person by reason
     of a breach by Lessor of the foregoing representation.

17.  SECURITY DEPOSIT. (a) Contemporaneously with the delivery by Lessee to
     Lessor of executed counterparts of this First Amendment to Lease, Lessee
     shall deliver the sum of $8,000.00 as an additional Security Deposit, which
     shall be deemed to be part of the "Security Deposit" for all purposes of
     the Lease.

     (b) Lessee shall deliver to Lessor, not later than the Building Addition
     Rent Commencement Date, an amount equal to one (1) months' Basic Rent on
     account of the Building Addition and the Adjacent Land (the "Additional
     Security Deposit"), which amount shall be deemed to be part of the
     "Security Deposit" for all purposes of the Lease; PROVIDED, HOWEVER, that
     if Lessor performs Lessor's Addition Work then (i) the amount of the
     Additional Security Deposit shall be increased to six (6) months' Basic
     Rent on account of the Building Addition and the Adjacent Land, and (ii)
     the Additional Security Deposit shall earn interest at the rate of five
     (5%) percent per annum.

18.  ELECTRONIC COPIES OF LEASE, ETC. In connection with Lessee's public
     filings, upon request by Lessee, Lessor shall provide (or shall cause
     Lessor's counsel to provide) to Lessee a copy of the Lease, this Amendment,
     any other amendments to the Lease hereafter executed, or any other
     agreements between Lessee and lessor relating to the Lease, in a
     computer-readable electronic format (i.e., on a computer disk in the format
     in which such documents were prepared or maintained by Lessor or its
     counsel).

19.  EFFECTIVE DATE. Except to the extent to which this Amendment specifically
     provides otherwise, all provisions of this Amendment shall

                                       15





<PAGE>   16

     be effective immediately upon the execution of this Amendment by both
     Lessor and Lessee.

                                       16



<PAGE>   17

     In all other respects, the terms and provisions of the Lease are hereby
ratified and confirmed and remain in full force and effect and unamended.

     EXECUTED UNDER SEAL as of the date set forth above.


     LESSOR:                          MASSACHUSETTS INSTITUTE OF
                                      TECHNOLOGY


                                      By: /s/ Philip A. Trussell
                                         --------------------------------------
                                         Philip A. Trussell,  /s/ JTM
                                         Director of Real Estate and
                                         Associate Treasurer
                                         Hereunto duly authorized


     LESSEE:                          ALKERMES, INC.


                                      By: /s/ Michael Landine
                                         --------------------------------------
                                         Name: Michael Landine
                                         Title: Chief Financial Officer
                                         Hereunto duly authorized

                                       17

<PAGE>   18

                                    EXHIBIT I
                                    ---------

                            SUPPLEMENTARY WORK LETTER
                            -------------------------

     This Supplementary Work Letter is incorporated by reference into the First
Amendment to Lease (the "Amendment") by and between Massachusetts Institute of
Technology, as Lessor, and Alkermes, Inc., as Lessee. Terms defined in or by
reference in the Amendment not otherwise defined herein shall have the same
meaning herein as therein.

1.   INTRODUCTION. This Supplementary Work Letter sets forth the terms and
     conditions for the construction of (i) improvements to the Building, and/or
     (ii) construction of the Building Addition.

2.   ADDITIONAL DEFINITIONS. Each of the following terms shall have the meaning
     stated immediately after it:

          ADDITION WORK. Collectively, Lessee's Addition Work and Lessor's
          Addition Work.

          CONSTRUCTION AUTHORIZATIONS. All permits, licenses and other consents
          and approvals required from any governmental authority for the
          construction of (as the case may be): (i) the Expansion Work, (ii)
          Lessee's Addition Work, or (iii) Lessor's Addition Work.

          EXPANSION WORK. The work to be performed by Lessee in and to the
          existing Building, as shown on Lessee's Working Drawings as approved
          by Lessor pursuant to Paragraph 4 hereof.

          LESSEE'S ADDITION WORK. The work, as shown on Lessee's Working
          Drawings as approved by Lessor pursuant to Paragraph 5(b) hereof, to
          be performed by Lessee as part of the initial construction of the
          Building Addition for Lessee's use and occupancy.

          LESSEE'S DELAY. A delay of the type identified in Paragraph 11(b) of
          this Supplementary Work Letter.

          LESSEE'S GENERAL CONTRACTOR. A general contractor selected by Lessee
          and approved in writing by Lessor (which approval shall not be
          unreasonably withheld or delayed, but Lessor may withhold approval of
          any general contractor based on Lessor's past experience with such

                                       18

<PAGE>   19

          general contractor), who will be engaged by Lessee to construct (as
          the case may be) the Expansion Work or Lessee's Addition Work.

          LESSEE'S WORKING DRAWINGS. The working drawings and specifications
          for, as the case may be, the Expansion Work or Lessee's Addition Work,
          to be prepared by Lessee and Lessee's architect in accordance with
          this Work Letter. Lessee's Working Drawings shall be prepared in
          compliance with all applicable Legal Requirements and stamped by
          registered Massachusetts professionals, and shall consist of all
          architectural and engineering plans and specifications which are
          required to construct the Expansion Work or Lessee's Addition Work (as
          the case may be) or to obtain any Construction Authorization required
          therefor.

          LESSOR'S ADDITION WORK. The work to be performed by Lessor in or on
          the Building Addition so as to provide the Building Addition as
          unfinished "shell" space to Lessee for the performance of Lessee's
          Addition Work, as shown on Lessor's Working Drawings as approved by
          Lessee pursuant to Paragraph 5(c) hereof, which work is anticipated to
          include the construction of (i) exterior walls and fenestration,
          including taped drywall on the inside surface of exterior walls, (ii)
          roof, (iii) foundation, (iv) subfloor, (v) electrical power feed,
          telephone cable, gas supply, water supply, and sanitary sewer service
          to the Building Addition from public utility lines, and (vi) heat (but
          not air-conditioning or make-up air), depending upon the actual
          operational requirements of Lessee.

          LESSOR'S DELAY. A delay of the type identified in Paragraph 11(a) of
          this Supplementary Work Letter.

          LESSOR'S WORKING DRAWINGS. The working drawings and specifications for
          Lessor's Addition Work, to be prepared by Lessor and Lessor's
          architect in accordance with this Work Letter. Lessor's Working
          Drawings shall be prepared in compliance with all applicable Legal
          Requirements and stamped by registered Massachusetts professionals,
          and shall consist of all architectural and engineering plans and
          specifications which are required to construct Lessor's Addition Work
          or to obtain any Construction Authorization required therefor.

3.   INSURANCE AND BONDS. Prior to the commencement of any design work on the
     Expansion Work or Lessee's Addition Work (as the case may be), Lessee shall
     provide to Lessor an original certificate of insurance, in customary

                                       19


<PAGE>   20
     form, for each architect and engineer retained by Lessee in connection with
     the design and/or construction of such work, which certificate shall
     evidence a current "errors and omissions" insurance policy as in effect, in
     an amount reasonably acceptable to Lessor. Prior to the commencement of any
     design work on Lessor's Addition Work, Lessor shall provide to Lessee an
     original certificate of insurance, in customary form, for each architect
     and engineer retained by Lessor in connection with the design and/or
     construction of Lessor's Addition Work, which certificate shall evidence a
     current "errors and omissions" insurance policy as in effect, in an amount
     reasonably acceptable to Lessee. Prior to the commencement of the
     construction of the Expansion Work or Lessee's Addition Work (as the case
     may be), Lessee shall provide to Lessor an original certificate of
     insurance for Lessee's General Contractor (or, if no general contractor is
     used, each trade contractor employed by Lessee in connection with the
     construction of such work), which certificate shall evidence a current
     general liability insurance policy as in effect, in an amount reasonably
     acceptable to Lessor, naming Lessor as an additional insured. Prior to the
     commencement of the construction of Lessor's Addition Work, Lessor shall
     provide to Lessee an original certificate of insurance for its general
     contractor (or, if no general contractor is used, each trade contractor
     employed by Lessor in connection with the construction of such work), which
     certificate shall evidence a current general liability insurance policy as
     in effect, in an amount reasonably acceptable to Lessee, naming Lessee as
     an additional insured.

     Lessee shall obtain from a surety reasonably satisfactory to Lessor payment
     and performance bonds for Lessee's General Contractor (in an amount not
     less than the full contract price), or if no general contractor is used,
     then for each trade contractor employed by Lessor in connection with the
     construction of such work whose bid price or contract price equals or
     exceeds $150,000 (in an amount not less than each such trade contractor's
     respective bid price or contract price), each of which bonds shall name
     Lessor as an additional obligee.

4.   Working Drawings for the Expansion Work.
     ---------------------------------------

     Lessee shall be solely responsible for the preparation and completion of
     all preliminary and final Lessee's Working Drawings for all of the
     Expansion Work. Lessee shall retain its own architects and engineers to
     prepare Lessee's Working Drawings, provided that Lessor first approves such
     engineers and architects so selected by Lessee, which approval shall not be
     unreasonably withheld or delayed. Lessee shall provide copies of the
     preliminary Lessee's Working Drawings to Lessor, and Lessor shall provide
     to

                                       20

<PAGE>   21

     Lessee within fifteen (15) business days after receipt of a complete set
     thereof a list of corrections and modifications which Lessor reasonably
     requires to be made to Lessee's Working Drawings. Lessor shall also provide
     to Lessee within such 15-business day period a list of those elements of
     the Expansion Work which Lessee must remove at the expiration or earlier
     termination of this Lease.

     Lessee shall revise the preliminary Lessee's Working Drawings to
     incorporate, to the extent reasonably practical, the corrections and
     modifications reasonably required by Lessor and shall submit final Lessee's
     Working Drawings to Lessor for its approval. Lessor shall review the final
     Lessee's Working Drawings and, within fifteen (15) business days after
     receipt of a complete set thereof, Lessor shall either (a) notify Lessee
     that Lessor has approved the final Lessee's Working Drawings, or (b)
     provide to Lessee a list of corrections and modifications which Lessor
     reasonably requires to be made to Lessee's Working Drawings. Lessor shall
     also provide to Lessee within such 15-business day period a supplementary
     list of those elements of the Expansion Work which Lessee must remove at
     the expiration or earlier termination of this Lease (if any). In the event
     Lessor returns Lessee's Working Drawings to Lessee for correction or
     modification, Lessee shall diligently correct the Working Drawings to
     incorporate, to the extent reasonably practical, the corrections and
     modifications reasonably required by Lessor and re-submit them to Lessor
     for approval pursuant to the preceding provisions of this paragraph. None
     of the Expansion Work shall commence until final Lessee's Working Drawings
     have been approved in writing by Lessor.

     Lessor's review of Lessee's Working Drawings shall be limited to the impact
     of the Expansion Work on the structural components of the Building, the
     roof of the Building and the Building systems, and the exterior appearance
     of the Building.

5.   Working Drawings for the Addition Work.
     --------------------------------------

     (a)  CONCEPT OF BUILDING ADDITION. Lessor and Lessee hereby acknowledge and
          agree that it is their mutual intention that the Building Addition be
          a two-story building which can be constructed on the Adjacent Land in
          conformance with then-applicable Legal Requirements, as the same may
          be varied by zoning relief obtainable by Lessor at Lessee's expense,
          upon such conditions as are acceptable to Lessor in its reasonable
          discretion. Lessor shall provide reasonable cooperation to Lessee in
          connection with obtaining such zoning relief, and Lessee

                                       21

<PAGE>   22

          shall reimburse Lessor upon request for all reasonable out-of-pocket
          expenses incurred by Lessor in connection therewith. Lessor and Lessee
          shall negotiate in good faith the location and size of the Building
          Addition, consistent with the understandings set forth in this
          subparagraph, in connection with the commencement of preparation of
          preliminary Lessor's Working Drawings and Lessee's Working Drawings
          for the Building Addition.

     (b)  LESSEE'S WORKING DRAWINGS. Lessee shall be solely responsible for the
          preparation and completion of all preliminary and final Lessee's
          Working Drawings for Lessee's Addition Work. Lessee shall retain its
          own architects and engineers to prepare Lessee's Working Drawings,
          provided that Lessor first approves such engineers and architects so
          selected by Lessee, which approval shall not be unreasonably withheld
          or delayed. Lessee shall provide copies of the preliminary Lessee's
          Working Drawings to Lessor, and Lessor shall provide to Lessee within
          fifteen (15) business days after receipt of a complete set thereof a
          list of corrections and modifications which Lessor reasonably requires
          to be made to Lessee's Working Drawings. Lessor shall also provide to
          Lessee within such 15-business day period a list of those elements of
          Lessee's Addition Work which Lessee must remove at the expiration or
          earlier termination of this Lease.

          Lessee shall revise the preliminary Lessee's Working Drawings to
          incorporate, to the extent reasonably practical, the corrections and
          modifications reasonably required by Lessor and shall submit final
          Lessee's Working Drawings to Lessor for its approval. Lessor shall
          review the final Lessee's Working Drawings and, within fifteen (15)
          business days after receipt of a complete set thereof, Lessor shall
          either (a) notify Lessee that Lessor has approved the final Lessee's
          Working Drawings, or (b) provide to Lessee a list of corrections and
          modifications which Lessor reasonably requires to be made to Lessee's
          Working Drawings. Lessor shall also provide to Lessee within such
          15-business day period a supplementary list of those elements of
          Lessee's Addition Work which Lessee must remove at the expiration or
          earlier termination of this Lease (if any). In the event Lessor
          returns Lessee's Working Drawings to Lessee for correction or
          modification, Lessee shall diligently correct the Working Drawings to
          incorporate, to the extent reasonably practical, the corrections and
          modifications reasonably required by Lessor and re-submit them to
          Lessor for approval pursuant to the preceding provisions of this
          paragraph. None of Lessee's Addition Work shall commence until

                                       22

<PAGE>   23

          final Lessee's Working Drawings have been approved in writing by
          Lessor.

     (c)  LESSOR'S WORKING DRAWINGS. Lessor shall be solely responsible for the
          preparation and completion of all preliminary and final Lessor's
          Working Drawings for Lessor's Addition Work. Lessor shall retain its
          own architects and engineers to prepare Lessor's Working Drawings.
          Within thirty (30) days after Lessor approves the preliminary Lessee's
          Working Drawings for Lessee's Addition Work, Lessor shall cause
          preliminary Lessor's Working Drawings to be prepared, and upon
          completion thereof Lessor shall provide copies of the same to Lessee.
          Lessee shall provide to Lessor within fifteen (15) business days
          thereafter a list of corrections and modifications which Lessee
          reasonably requires to be made to the preliminary Lessor's Working
          Drawings by reason of a conflict between such preliminary Working
          Drawings and the preliminary Lessee's Working Drawings as approved by
          Lessor.

          After Lessor has approved final versions of Lessee's Working Drawings
          for Lessee's Addition Work, Lessor shall revise the preliminary
          Lessor's Working Drawings or Lessor's Addition Work to incorporate, to
          the extent reasonably practical, the corrections and modifications
          reasonably required by Lessee and to make the same consistent with the
          approved final Lessee's Working Drawings. Lessor shall submit final
          Lessor's Working Drawings to Lessee for its approval. Lessee shall
          review the final Lessor's Working Drawings and, within fifteen (15)
          business days after receipt thereof, Lessee shall either (a) notify
          Lessor that Lessee has approved the final Lessor's Working Drawings,
          or (b) provide to Lessor a list of corrections and modifications which
          Lessee reasonably requires to be made to Lessor's Working Drawings by
          reason of a conflict between the final approved Lessee's Working
          Drawings and such revised Lessor's Working Drawings. In the event
          Lessee returns Lessor's Working Drawings to Lessor for such correction
          or modification, Lessor shall diligently correct Lessor's Working
          Drawings to incorporate, to the extent reasonably practical, the
          corrections and modifications reasonably required by Lessee and to
          make the same consistent with the approved final Lessee's Working
          Drawings, and resubmit them to Lessee for approval pursuant to the
          preceding provisions of this paragraph.


                                       23

<PAGE>   24

6.   PROVISIONS APPLICABLE TO WORKING DRAWINGS GENERALLY. The review and/or
     approval by Lessor or its architect or engineers of any plans, sketches or
     Lessee's Working Drawings submitted by Lessee relating to the Expansion
     Work or Lessee's Addition Work, or the review and/or approval by Lessee or
     its architect or engineers of any plans, sketches or Lessor's Working
     Drawings submitted by Lessor relating to Lessor's Addition Work, shall not
     (i) constitute an opinion or representation by the reviewing/approving
     party that the same are in compliance with all applicable Legal
     Requirements and the provisions of all applicable insurance policies or as
     to the feasibility of constructing the work shown thereon, or (ii) impose
     on the reviewing/approving party any responsibility for a design defect, it
     being agreed that all such responsibility shall remain solely with the
     party which submitted such Working Drawings for review and approval.

     Each party submitting preliminary Working Drawings to the other for
     approval pursuant to this Work Letter shall include with such submittal a
     proposed schedule for the commencement and completion (both substantial
     completion and final completion) of the work shown thereon. Each party
     reviewing Working Drawings shall also, within the time period above
     provided for review of Working Drawings, review and approve or suggest
     modifications to such proposed schedule. No Expansion Work shall commence
     unless and until the parties have reached agreement upon the schedule for
     the Expansion Work; no Addition Work shall commence unless and until the
     parties have reached agreement upon the schedule for Lessor's Addition Work
     and Lessee's Addition Work. The parties shall make good faith efforts to
     reach agreement on each other's Working Drawings and on the schedule for
     the performance of the work shown thereon.

     In the event that Lessor or Lessee fails to respond to the other party
     within any of the 15-business day periods set forth in Paragraphs 4 or 5
     above, the party submitting the Working Drawings and/or schedule for review
     (the "Submitting Party") shall provide written notice to the other party
     (the "Reviewing Party") of such Reviewing Party's failure to respond, which
     notice shall state that such Reviewing Party's continued failure to respond
     to such Working Drawings and/or schedule within ten (10) days of such
     Reviewing Party's receipt of such notice shall be deemed to be approval by
     the Reviewing Party of the Working Drawings and/or schedule as submitted by
     the Submitting Party. In the event that the Reviewing Party fails to
     respond in writing to the Working Drawings within such 10-day period, the
     Reviewing Party shall be deemed to have approved the Working Drawings
     and/or schedule as submitted to it.


                                       24
<PAGE>   25

7.   COST OF LESSOR'S ADDITION WORK. Lessor shall also provide to Lessee,
     together with Lessor's preliminary Working Drawings for Lessor's Addition
     Work, an estimate of the cost to construct Lessor's Addition Work
     (supported by bids or take-offs from the preliminary Working Drawings),
     broken down into reasonable detail. Lessee shall have twenty (20) days from
     its receipt of such cost breakdown to notify Lessor in writing that either
     (i) Lessee approves such cost estimate, or (ii) Lessee does not approve
     such cost estimate and desires to complete the preparation of Lessor's
     Working Drawings and to construct Lessor's Work as provided in Paragraph
     15(g) of the Amendment, or (iii) Lessee does not approve such cost estimate
     and thereby rescinds its exercise of the Building Addition Option. Lessee
     acknowledges that any such cost estimate is an estimate only, and that
     Basic Rent on account of the Building Addition shall be based upon the
     actual out-of-pocket cost to Lessor of performing Lessor's Addition Work.

     If Lessee does not approve such cost estimate and desires to complete the
     preparation of Lessor's Working Drawings and to construct Lessor's Work as
     provided in Paragraph 15(g) of the Amendment, then Lessee shall pay to
     Lessor, within thirty (30) days of demand therefor, as Additional Rent, all
     out-of-pocket costs incurred by Lessor (i) in connection with preparing the
     Working Drawings for Lessor's Addition Work prior to Lessor's receipt of
     such notice from Lessee, or (ii) in terminating any contracts theretofore
     entered into by Lessor in connection with the preparation of Lessor's
     Working Drawings for Lessor's Addition Work or for the construction
     thereof.

     If Lessee rescinds its exercise of the Building Addition Option, then the
     Lease shall continue in full force and effect as if Lessee had given
     Lessee's Notice of Exercise and not exercised the Building Addition Option,
     except that:

     (i)  Lessee shall pay to Lessor, within thirty (30) days of demand
          therefor, as Additional Rent, all out-of-pocket costs incurred by
          Lessor (A) in demolishing the Adjacent Building and levelling the
          Adjacent Land, (B) in preparing the Working Drawings for Lessor's
          Addition Work, or (C) in terminating any contracts theretofore entered
          into by Lessor in connection with the preparation of Lessor's Working
          Drawings for Lessor's Addition Work or for the construction thereof;
          and

     (ii) Lessee shall have waived any further right to exercise the Building
          Addition Option.

                                       25

<PAGE>   26

     If Lessee does not respond to such cost breakdown within such 20-day
     period, Lessor shall give Lessee written notice of its failure to respond,
     which notice shall state that Lessee's continued failure to respond to such
     cost breakdown within ten (10) days of Lessee's receipt of such notice
     shall be deemed to be approval of such cost breakdown by Lessee, and if
     Lessee thereafter fails to respond in writing to such cost breakdown within
     such 10- day period, Lessee shall be deemed to have approved such cost
     breakdown as submitted to it. In no event shall Lessor be required to
     prepare final Working Drawings for Lessor's Addition Work, or to perform
     any of Lessor's Addition Work, unless and until Lessee has approved the
     estimated cost of Lessor's Addition Work (or is deemed, pursuant to the
     provisions of this Paragraph 7, to have approved such estimated cost).

8.   EXPANSION WORK AND LESSEE'S ADDITION WORK. Lessee shall be solely
     responsible for obtaining all Construction Authorizations required for the
     Expansion Work or Lessee's Addition Work. Lessor shall provide reasonable
     cooperation to Lessee in making and prosecuting applications for such
     Construction Authorizations, but Lessor shall not be required to incur any
     cost or expense in so doing. Lessee shall apply for and maintain in full
     force and effect (or cause Lessee's General Contractor to apply for and so
     maintain) all Construction Authorizations required for the construction of
     the Expansion Work or Lessee's Addition Work, and upon completion of the
     Expansion Work or Lessee's Addition Work (as the case may be), shall obtain
     a certificate of occupancy for the Premises or the Building Addition (as
     the case may be) from the appropriate governmental authority. Lessee shall
     deliver to Lessor a copy of said certificate of occupancy promptly after
     receiving the same.

     Lessee shall obtain from Lessee's General Contractor (or, if no general
     contractor is retained, from each trade contractor) a guaranty against
     construction defects for a period of not less than one (1) year.

     Promptly after receiving all Construction Authorizations required for the
     Expansion Work or Lessee's Addition Work (as the case may be), Lessee shall
     cause Lessee's General Contractor to commence construction and diligently
     to proceed to completion thereof. All construction shall be performed in a
     good and workmanlike manner, using new materials and in compliance with the
     approved Lessee's Working Drawings, the Construction Authorizations, all
     Legal Requirements, and the provisions of all applicable insurance
     policies.

                                       26

<PAGE>   27

     Lessee shall be solely responsible for all costs and expenses of all
     architects, engineers and other consultants, and contractors,
     subcontractors and suppliers retained or employed (directly or indirectly)
     by Lessee in connection with the design or construction of the Expansion
     Work or Lessee's Addition Work. Lessee shall pay promptly for all labor and
     materials supplied to Lessee in connection with the Expansion Work or
     Lessee's Addition Work, shall not cause or permit any liens for such labor
     or materials to attach to the Land, the Building, the Adjacent Land or the
     Building Addition, and shall bond or discharge any such lien which may be
     filed or recorded within thirty (30) days after Lessee receives notice of
     such filing or recording.

     Lessor shall have no obligation to make any payment on account of the cost
     of preparing Lessee's Working Drawings or the construction of the Expansion
     Work or Lessee's Addition Work.

     The performance of the Expansion Work or Lessee's Addition Work (as the
     case may be) shall be subject to the requirements set forth in Section
     12.0(f) of the Lease. Lessor may inspect such work at any time or times and
     shall promptly give written notice to Lessee of any observed defects.
     Lessee shall promptly correct all such defective work at its sole cost and
     expense. In the event that at any time during construction of the Expansion
     Work or Lessee's Addition Work Lessee fails so to correct promptly any
     defective work, Lessor shall give an additional written notice to Lessee
     which notice shall state that if Lessee does not correct such defective
     work within ten (10) days of its receipt of such notice (or, if such
     defective work cannot reasonably be corrected within such 10-day period, if
     Lessee does not commence the correction of such defective work within such
     10-day period and continue such correction diligently to completion
     thereafter), then, in addition to any other remedies which Lessor may have
     under the Lease or at law or in equity for such default, Lessor may correct
     such work. If Lessor thereafter corrects such defective work in accordance
     with the provisions of this Paragraph, Lessor shall provide to Lessee
     reasonable supporting documentation of the actual out-of-pocket costs
     incurred by Lessor in correcting such defective work and the provisions of
     Paragraph 16(b) below shall apply.

9.   LESSOR'S ADDITION WORK. Lessor shall be solely responsible for obtaining
     all Construction Authorizations required for Lessor's Addition Work.
     Promptly after receiving all Construction Authorizations required for
     Lessor's Addition Work, Lessor shall commence construction and diligently
     proceed to completion thereof. All construction shall be performed in a
     good and workmanlike manner, using new materials and in compliance with the

                                       27

<PAGE>   28

     approved Lessor's Working Drawings, the Construction Authorizations, all
     Legal Requirements, and the provisions of all applicable insurance
     policies. Lessor shall use reasonable efforts to minimize the cost of
     Lessor's Addition Work.

     Lessor shall obtain from its general contractor (or, if no general
     contractor is retained, from each trade contractor) a guaranty against
     construction defects for a period of not less than one (1) year.

     Lessee may inspect such work at any time or times and shall promptly give
     written notice to Lessor of any observed defects. Lessor shall promptly
     correct all such defective work at its sole cost and expense. In the event
     that at any time during construction of Lessor's Addition Work Lessor fails
     so to correct promptly any defective work, Lessee shall give an additional
     written notice to Lessor which notice shall state that if Lessor does not
     correct such defective work within ten (10) days of its receipt of such
     notice (or, if such defective work cannot reasonably be corrected within
     such 10- day period, if Lessor does not commence the correction of such
     defective work within such 10-day period and continue such correction
     diligently to completion thereafter), Lessee may correct such work. If
     Lessee thereafter corrects such defective work in accordance with the
     provisions of this Paragraph, Lessee shall provide to Lessor reasonable
     supporting documentation of the actual out-of-pocket costs incurred by
     Lessee in correcting such defective work and the provisions of Paragraph
     16(a) below shall apply.

10.  Substantial Completion; Building Addition Rent Commencement Date.
     ----------------------------------------------------------------

     (a) Lessor and Lessee acknowledge that portions of Lessor's Addition Work
     will be proceeding concurrently with Lessee's Addition Work. Each party
     shall make diligent efforts to complete in a timely manner those portions
     of its respective work which must be completed before the other party can
     perform its work in that area.

     (b) The Building Addition Rent Commencement Date shall be the first to
     occur of:

         (i)   the day on which Lessor's and Lessee's architects jointly
               reasonably determine that the Building Addition has been
               "substantially completed", meaning that Lessor's Addition Work
               and Lessee's Addition Work have been completed, except for items
               of work which are not necessary to make the Building

                                       28

<PAGE>   29

               Addition reasonably usable for the Permitted Uses and which,
               because of season or weather or nature of the item, cannot
               practicably be done at that time;

         (ii)  the date on which Lessee first occupies the Building Addition or
               any portion thereof for the Permitted Uses; or

         (iii) the date on which Lessor's and Lessee's architects jointly
               reasonably determine that the Building Addition would have been
               substantially completed but for Lessee's Delay.

11.  Delays.
     ------

     (a) LESSOR'S DELAY. If the substantial completion of Lessee's Addition Work
     is delayed by:

          (i)  the failure of Lessor to substantially complete those portions of
               Lessor's Addition Work which must be substantially completed in
               order for construction of Lessee's Addition Work to proceed in a
               timely manner, which failure is caused by the delay of Lessor,
               Lessor's employees or agents, or Lessor's architects or
               engineers, or Lessor's general contractor or any subcontractor or
               supplier thereof (but specifically excluding any delay caused by
               Lessee, Lessee's architects or engineers, Lessee's General
               Contractor, or any subcontractor or supplier thereof or any delay
               caused by an event of Force Majeure (as defined in Section 24.0
               of the Lease)), then the Building Addition Rent Commencement
               Date shall be delayed beyond the date set forth in the schedule
               approved pursuant to Paragraph 5 above by the number of days of
               actual delay in the substantial completion of Lessee's Addition
               Work caused by such failure on the part of Lessor (as reasonably
               determined by Lessor's architect), PROVIDED, HOWEVER that in the
               event of the occurrence of any such act or omission which Lessee
               believes is delaying the performance by Lessee's General
               Contractor or any subcontractor thereof, Lessee shall give notice
               thereof to Lessor within ten (10) days of Lessee's acquiring
               actual knowledge of such act or omission, which notice shall be a
               condition precedent to such act or omission being deemed a basis
               for an extension of the Building Addition Rent Commencement Date
               under this clause (i); or


                                       29

<PAGE>   30

          (ii) the failure of Lessor to respond to preliminary Working Drawings
               or final Working Drawings submitted by Lessee within the
               15-business day period for such response as set forth in
               Paragraph 5 of this Work Letter, then the Building Addition Rent
               Commencement Date shall be delayed beyond the date set forth in
               the schedule approved pursuant to Paragraph 5 above by one day
               for each day such response is delayed beyond such 15-business day
               period.

     (b) LESSEE'S DELAY. If the substantial completion of Lessee's Addition Work
     is delayed by any cause other than (i) a Lessor's Delay as defined above,
     or (ii) an event of Force Majeure (as defined in Section 24.0 of the Lease)
     (a "Lessee's Delay"), such delay shall have no effect on the Building
     Addition Rent Commencement Date and the Building Addition Rent Commencement
     Date shall be the date on which Lessor's architect reasonably determines
     that the Building Addition would have been substantially completed but for
     such Lessee's Delay.

     (c) FORCE MAJEURE. In the event that either Lessee or Lessor is delayed in
     the performance of any of its obligations hereunder by the occurrence of an
     event of Force Majeure, then the Building Addition Rent Commencement Date
     shall be extended one day for each day such event of Force Majeure
     continues.

12.  COSTS OF WORK. In connection with any Expansion Work, Lessor's Addition
     Work or Lessee's Addition Work performed pursuant to this Supplementary
     Work Letter:

     (a)  the party performing such work shall provide reasonably detailed
          information to the other party on a periodic basis concerning the
          actual out-of-pocket costs and expenses being incurred in connection
          with the design and performance of such work, together with, upon
          request, reasonable supporting documentation, and

     (b)  within a reasonable time after completion of such work, the party
          performing such work shall provide to the other party a final
          statement of the total actual out-of-pocket costs and expenses
          incurred in connection with the design and performance of such work,
          in reasonable detail, and shall further provide, upon request,
          reasonable supporting documentation therefor to the extent not
          previously provided to the requesting party pursuant to the preceding
          subparagraph (a).

                                       30

<PAGE>   31

13.  LESSEE'S ACCESS TO THE PREMISES. Lessee and Lessee's architects, engineers,
     Lessee's General Contractor, its subcontractors and suppliers may, at
     Lessee's sole risk, enter upon the Expansion Premises (and in the case of
     Lessee's Addition Work, upon the Adjacent Land and the Building Addition)
     for the limited purpose of constructing the Expansion Work or Lessee's
     Addition Work (as the case may be) PROVIDED that such persons work in
     harmony with Lessor and Lessor's general contractor, its subcontractors and
     suppliers. If at any time such entry shall cause or threaten to cause
     disharmony or otherwise interfere with the orderly completion or operation
     of the Building or the Building Addition, Lessor shall have the right upon
     twenty-four (24) hours' written notice to Lessee to withdraw the consent to
     such entry given in this Paragraph. Any such entry onto the Land, the
     Building, the Premises, the Adjacent Land or the Building Addition shall be
     deemed to be under all of the terms, covenants, conditions and provisions
     of this Lease. Lessor shall not be liable in any way for any injury, loss
     or damage which may occur to any of Lessee's work and installations made in
     the Building or the Building Addition or to properties placed therein
     during construction of the Expansion Work or Lessee's Addition Work, the
     same being at Lessee's sole risk, EXCEPT that the foregoing shall not apply
     to any injury, loss or damage caused by the negligence or willful
     misconduct of Lessor or its officers, agents, employees, servants or
     contractors.

14.  LESSOR'S AND LESSEE'S REPRESENTATIVES. Prior to the commencement of any
     design work for each of the Expansion Work or the Addition Work, each party
     hereto shall designate in writing to the other a person as "Lessor's
     Representative" and "Lessee's Representative" respectively, which person
     shall be available during ordinary business hours to review the progress of
     the work and to respond to issues which arise during construction. Each
     party may rely on the other's Representative with respect to all matters
     which pertain to this Work Letter, each party having authorized its
     Representative to make decisions binding upon such party with respect to
     such matters.

15.  Completion of Lessor's Addition Work and Acceptance by Lessee.
     -------------------------------------------------------------

     (a)  A punchlist of incomplete or defective items of Lessor's Addition Work
          shall be developed by Lessee and Lessor within fifteen (15) days after
          Lessor's Addition Work is "substantially completed" (as defined in
          Paragraph 10(b) of this Work Letter) by means of a joint inspection of
          the Building Addition by Lessor and Lessee or their respective
          architects or designees. Lessor shall complete all punchlist work as
          soon as practicable.

                                       31

<PAGE>   32

     (b)  Lessor's Addition Work shall be deemed to be accepted by Lessee except
          for such items as are specified either (a) in the punchlist described
          in the preceding subparagraph or (b) in a written notice given by
          Lessee to Lessor not later than thirty (30) days after the earlier of
          (i) the date on which Lessor notifies Lessee that Lessor's Addition
          Work is complete or (ii) the date on which Lessee first occupies any
          portion of the Building Addition to conduct its business therein,
          except for defects which are not reasonably discoverable during such
          30-day period. Lessor shall correct the items set forth in such notice
          as soon as practicable.

     (c)  In the event that Lessor fails to correct any item specified in the
          punchlist or in such a written notice delivered by Lessee to Lessor
          within the time period specified in the preceding subparagraphs of
          this Paragraph 15, then Lessee may correct such work. If Lessee
          thereafter corrects such item in accordance with the provisions of
          this Paragraph, Lessee shall provide to Lessor reasonable supporting
          documentation of the actual out-of-pocket costs incurred by Lessee in
          correcting such defective work and the provisions of Paragraph 16(a)
          below shall apply.

16.  Costs Incurred in Correcting or Completing Other Party's Work.
     -------------------------------------------------------------
 
     (a) All actual out-of-pocket costs reasonably incurred by Lessee in
     correcting or completing any of Lessor's Addition Work as performed by
     Lessor shall be deducted from the cost of Lessor's Addition Work for
     purposes of calculating Basic Rent for the Building Addition pursuant to
     Section 4.1(a)(ii) of the Lease.

     (b) All actual out-of-pocket costs reasonably incurred by Lessor in
     correcting or completing any item of the Expansion Work or Lessee's
     Addition Work shall be paid by Lessee to Lessor, as Additional Rent, within
     thirty (30) days of written demand therefor by Lessor.

17.  GENERAL. A breach by Lessee of any provision of this Work Letter shall
     constitute a default under the Lease, for which Lessor shall have all
     remedies therein provided.

                                       32

<PAGE>   1
                                                                Exhibit 10.22(b)


                                SECOND AMENDMENT


to the Development Agreement by and between Janssen Pharmaceutica International,
a division of Cilag International AG, having its place of business in CH-6300
Zug, Switzerland ("JANSSEN") and Medisorb Technologies International, a Delaware
limited partnership ("Medisorb"), which agreement has in the meantime been duly
assigned from Medisorb to Alkermes Controlled Therapeutics Inc. II, 64 Sidney
Street, Cambridge, MA 02139-4136, U.S.A. ("ACT II") by a deed of assignment
dated March 1, 1996.

     WHEREAS, JANSSEN and ACT II desire to amend certain terms of the
Development Agreement with respect to the continuation, management and further
funding of the Development Program.

     NOW, THEREFORE, the parties agree to amend the Development Agreement as
follows:

     1.   In connection with Section 3 A., the Parties will undertake the
          development activities set forth in the Development Plan attached to
          this Amendment as Exhibit 1. Such activities will be undertaken in
          accordance with the time and event schedule specified in the
          Development Plan with a view to finalize the IRF within the timeframe
          provided for in Section 4 A. of the Development Agreement. The


<PAGE>   2

          Development Plan attached hereto cancels and supersedes the initial
          Development Program referred to in Section 3A of the Development
          Agreement.

     2.   Section 3 B. is hereby amended and replaced by the following:

          The development activities to be undertaken hereunder will be
          coordinated by a development team comprised of representatives of
          JANSSEN or JANSSEN's Affiliates and ACT II (hereinafter "The
          Development Team"). The Development Team will monitor and coordinate
          all scaling up efforts in the preparation of the commercial
          manufacturing process of the Product and all regulatory support
          efforts in the preparation of the IRF and the subsequent regulatory
          filings with national Health Authorities.

          In the event that the Parties would consider additional activities to
          be undertaken during the Development Program, such activities will be
          discussed at the level of the Development Team, and, if such
          activities are to be added to the Development Plan, a related budget
          will be agreed

                                        2
<PAGE>   3

          by the Parties in accordance with the provisions of Section 3 D.

          The Development team will meet at regular intervals as agreed by both
          parties or upon the specific request of JANSSEN and at such locations
          as JANSSEN shall determine, or, at the option of either party, through
          video or telephone conferences. The Development Team shall endeavor to
          resolve all matters by consensus, each party having one vote. If the
          Development Team cannot reach an unanimous decision on any matter,
          such matter shall be resolved based on and consistent with JANSSEN's
          decision, it being understood that JANSSEN can not unilaterally change
          the terms of this Agreement or the Budget related to the Development
          Plan or decide that ACT II has to substantially increase its support
          in addition to the efforts already committed by ACT II in accordance
          with the current Development Plan.

     3.   Section 3 C. is hereby amended and replaced by the following:

          ACT II will use reasonable efforts to comply with its commitments
          under the Development Plan and

                                        3

<PAGE>   4

          will dedicate sufficient staff with sufficient skills to support its
          efforts. ACT II will provide JANSSEN and JANSSEN's Affiliates
          represented in the Development Team with a monthly written report
          specifying the activities undertaken by it under the Development Plan.

          ACT II will also create detailed descriptions of any methodology,
          development formulation or processes related to development of Product
          in order to enable JANSSEN to prepare and file any regulatory approval
          and to assist in meetings with the regulatory authorities and to
          enable JANSSEN and/or ACT II as the case may be, to prepare and start
          up the commercial manufacturing process and the decision process
          related thereto.

     4.   Section 3 D. is hereby amended and replaced by the following:

          The parties have agreed on a budget in connection with the activities
          to be undertaken by ACT II hereunder and such budget forms part of the
          Development Plan (hereinafter "The Budget").


                                        4

<PAGE>   5

          The Budget includes all the estimated costs to be reimbursed by
          JANSSEN to ACT II under the Development Plan, including the clinical
          trial supplies up to and including Phase III clinical trials. In April
          of each calendar year the Budget will be adjusted to the FTE (Full
          Time Equivalent) rate for the next following Alkermes (being ACT II's
          parent) fiscal year. Such FTE rate will be calculated by dividing the
          total expenses of Alkermes (being ACT II's parent) by the number of
          direct personnel. This personnel excludes G&A, finance, legal and
          human resources. Prior to implementing such new FTE rate, JANSSEN and
          ACT II will discuss the impact on the Budget of such new FTE-rate.

          In the event that as a result of additional activities to be
          undertaken by ACT II, the Budget would have to be revised, the parties
          will agree on such revision prior to ACT II starting any such
          activities.

          The Budget provides for the purchase of the capital items specified in
          Exhibit 2 attached hereto dedicated to the development of the Product
          for a total amount 1,860,000 USD. Such capital

                                        5

<PAGE>   6

          items will be paid for by JANSSEN or its designee and ownership will
          reside with JANSSEN or the designee who paid for such capital items.
          Such capital items will be used by ACT II in its premises solely in
          relation to the development and manufacture of Product as provided for
          in the Development Plan and shall only be acquired after consultation
          and approval of JANSSEN. ACT II will be responsible for the
          maintenance of such capital items. All other capital items required by
          ACT II to perform the activities provided for in the Development Plan
          will be ACT II's obligation and responsibility.

          Upon termination of the Development Agreement for any reason
          whatsoever, the capital items paid for by JANSSEN or its designee will
          be transferred to JANSSEN or its designee, at JANSSEN's cost.

          ACT II will invoice JANSSEN on a monthly basis for the activities
          undertaken by it during the previous month. Together with such
          invoice, ACT II will send the monthly report detailing the efforts
          expended under the Development Plan during such month. JANSSEN will
          pay ACT II within thirty

                                        6

<PAGE>   7

          (30) days following receipt of the invoice and the related report.

     This Second Amendment is deemed to be effective as from March 8, 1996.

          Since both JANSSEN and Janssen Pharmaceutica Inc., 1125
          Trenton-Harbourton Road, Titusville, NJ 08560, U.S.A., have exercised
          the option to enter into a License Agreement provided for in Section
          6(A) of the Development Agreement, as duly amend by the First
          Amendment, Janssen Pharmaceutica Inc. will co-sign this Second
          Amendment, to indicate its agreement with the terms thereof.


                                        7

<PAGE>   8

     WITNESS, the signature of all parties hereto by their duly authorized
officers.

                                          JANSSEN PHARMACEUTICA
                                          INTERNATIONAL

                                          Date:  April 28, 1997

/s/ Erik Rombouts                         /s/ Heinz Schmid
- -------------------------------------     -------------------------------------
(title) Division Manager                  (title)  General Manager
                                                   International Trading



                                          ALKERMES CONTROLLED
                                          THERAPEUTICS INC. II

                                          Date:


                                          /s/ Michael Landine
- -------------------------------------     -------------------------------------
(title)                                   (title)  Vice President



                                          JANSSEN PHARMACEUTICA INC.

                                          Date:


                                          /s/ Paulo F. Costa
- -------------------------------------     -------------------------------------
(title)                                   (title)  President



                                        8


<PAGE>   1
                                                                Exhibit 10.27(a)

                   LOAN SUPPLEMENT AND MODIFICATION AGREEMENT

     This Loan Supplement and Modification Agreement ("this Agreement") is made
as of June 2, 1997 by and among Alkermes, Inc., a Pennsylvania corporation
("Alkermes"), Alkermes Controlled Therapeutics, Inc., a Pennsylvania corporation
("ACT I"), Alkermes Controlled Therapeutics Inc. II, a Pennsylvania corporation
("ACT II") (Alkermes, ACT I and ACT II being hereinafter referred to
collectively as the "Borrowers" and individually as a "Borrower") and Fleet
National Bank (the "Bank"). The Bank is the successor by merger to Fleet Bank of
Massachusetts, N.A. ("Fleet Mass"). For good and valuable consideration, receipt
and sufficiency of which are hereby acknowledged, the Borrowers and the Bank
agree as follows:

     1. REFERENCE TO DOCUMENTS. Reference is made to (i) that certain letter
agreement dated September 27, 1996 (the "Letter Agreement") among the Borrowers
and the Bank; (ii) that certain $3,187,496 original principal amount promissory
note dated December 23, 1994 made by Alkermes and payable to the order of Fleet
Mass, as amended by Allonge to Note dated September 27, 1996 among Alkermes, ACT
I and the Bank (said December 23, 1994 promissory note, as so amended, being
hereinafter referred to as the "1994 Note"); (iii) that certain $1,500,000
original principal amount promissory note dated December 19, 1995 made by
Alkermes and payable to the order of Fleet Mass, as amended by Allonge to Note
dated September 27, 1996 among Alkermes, ACT I and the Bank (said December 19,
1995 promissory note, as so amended, being hereinafter referred to as the "1995
Note"); (iv) that certain $5,000,000 original principal amount promissory note
dated September 27, 1996 (the "Ohio Term Note") made by Alkermes and ACT II and
payable to the order of the Bank; (v) that certain Security Agreement dated as
of September 27, 1996 (the "Security Agreement") from the Borrowers to the Bank;
(vi) that certain Pledge Agreement (the "Pledge") dated as of September 27, 1996
from Alkermes to the Bank; (vii) that certain Mortgage and Security Agreement
dated as of September 27, 1996 (the "Ohio Mortgage") from ACT II to the Bank
relating to premises of ACT II in Clinton County, Ohio; and (viii) that certain
promissory note of even date herewith (the "1997 Term Note") in the face
principal amount of the $2,500,000 made by the Borrowers and payable to the
order of the Bank. The Letter Agreement, the 1994 Note, the 1995 Note, the Ohio
Term Note, the Security Agreement, the Pledge, the Ohio Mortgage and the 1997
Term Note are hereinafter referred to collectively as the "Financing Documents".
A copy of the form of the 1997 Term Note is attached hereto as Exhibit 1.

     2. 1997 TERM LOAN. (a) MAKING OF 1997 TERM LOAN. At the date hereof, the
Bank is making a loan (the "1997 Term Loan") to the Borrowers in the principal
amount of $2,500,000. The 1997


<PAGE>   2

Term Loan is being made in order to finance costs of Qualifying Equipment
acquired by any Borrower after January 1, 1996 (excluding Ohio Loan Collateral,
as defined in the Security Agreement). The 1997 Term Loan does not exceed 100%
of the invoiced actual costs of the tangible property constituting the items of
Qualifying Equipment with respect to which the 1997 Term Loan is made (excluding
taxes, shipping, software, installation charges, training fees and other "soft
costs"). In connection with the making of the 1997 Term Loan, and as a
precondition thereto, the Borrowers are providing the Bank with: (i) invoices
supporting the costs of the relevant Qualifying Equipment; (ii) such evidence as
the Bank may reasonably request showing that each item of Qualifying Equipment
has been delivered to and installed at Alkermes' or ACT I's premises in
Cambridge, MA (in the case of Qualifying Equipment owned by Alkermes or ACT I)
or ACT II's premises in Clinton County, Ohio and Hamilton County, Ohio (in the
case of Qualifying Equipment owned by ACT II), has become fully operational, has
been paid for by the relevant Borrower and is owned by the relevant Borrower
free of all liens and interests of any other person or entity (other than the
security interest of the Bank pursuant to the Security Agreement); (iii)
executed Uniform Commercial Code financing statements reflecting the items of
Qualifying Equipment with respect to which the 1997 Term Loan is being made and
an appropriate supplement to the Security Agreement reflecting such items; and
(iv) evidence satisfactory to the Bank that the Qualifying Equipment is fully
insured against casualty loss, with insurance naming the Bank as secured party
and first loss payee. As used herein, "Qualifying Equipment" means equipment
purchased by the Borrowers after January 1, 1996 (excluding Ohio Loan
Collateral, as defined in the Security Agreement) for use in the Borrowers'
business which meets all of the following criteria: (i) such equipment consists
of one of the items shown on the Equipment List heretofore delivered by the
Borrowers to the Bank or has otherwise been approved by the Bank for use in
supporting the 1997 Term Loan, (ii) each item of such equipment has been
delivered to and installed at Alkermes' or ACT I's premises in Cambridge, MA (in
the case of Qualifying Equipment owned by Alkermes or ACT I) or ACT II's
premises in Clinton County, Ohio or Hamilton County, Ohio (in the case of
Qualifying Equipment owned by ACT II) and has become fully operational, (iii)
the relevant Borrower has paid in full for each item of such equipment and holds
title to same, free of all interests and claims of any other person or entity
(other than the security interest of the Bank), and (iv) the Bank has a fully
perfected first security interest in such equipment. The 1997 Term Loan is
evidenced by the 1997 Term Note. Interest on the 1997 Term Loan

                                        2

<PAGE>   3

shall be payable at the times and at the rate provided for in the 1997 Term
Note. Overdue principal of the 1997 Term Loan and, to the extent permitted by
law, overdue interest shall bear interest at a rate per annum which at all times
shall be equal to the sum of (i) two (2%) percent per annum plus (ii) the per
annum rate otherwise payable under the 1997 Term Note (but in no event in excess
of the maximum rate from time to time permitted by then applicable law),
compounded monthly and payable on demand. Each Borrower hereby irrevocably
authorizes the Bank to make or cause to be made, on a schedule attached to the
1997 Term Note or on the books of the Bank, at or following the time of
receiving any payment of principal of the 1997 Term Loan, an appropriate
notation reflecting such transaction and the then unpaid principal balance of
the 1997 Term Loan. The amount so noted shall constitute presumptive evidence as
to the amount owed jointly and severally by the Borrowers with respect to
principal of the 1997 Term Loan. Failure of the Bank to make any such notation
shall not, however, affect any obligation of any Borrower or any right of the
Bank hereunder or under the 1997 Term Note. The 1997 Term Loan is made jointly
to the Borrowers and repayment thereof is the joint and several obligation of
the Borrowers.

     (b) REPAYMENT OF 1997 TERM LOAN. The Borrowers shall repay (and shall be
jointly and severally obligated to repay) principal of the 1997 Term Loan in 60
equal consecutive monthly installments, commencing on July 1, 1997 and
continuing on the first business day of each month thereafter. Each such monthly
installment of principal paid with respect to the 1997 Term Loan shall be in an
amount equal to 1/60th of the original principal amount of the 1997 Term Loan.
In any event, the then outstanding principal balance of the 1997 Term Loan and
all interest then accrued but unpaid thereon shall be due and payable in full on
June 3, 2002. The Borrowers may prepay, at any time or from time to time, the
whole or any portion of the 1997 Term Loan; provided that each such principal
prepayment shall be accompanied by payment of all interest under the 1997 Term
Note accrued but unpaid to the date of payment; and further provided that at the
time of each such prepayment the Borrowers pay to the Bank the Make-Whole
Amount, if any, required by the second paragraph of Section 1.6 of the Letter
Agreement in respect of such prepayment. Any partial prepayment of principal of
the 1997 Term Loan will be applied to installments of principal of the 1997 Term
Loan thereafter coming due in inverse order of normal maturity.


                                        3

<PAGE>   4

     (c) FACILITY FEES. With respect to the 1997 Term Loan, the Borrowers are
paying to the Bank, at the date of execution and delivery of this Agreement, a
non-refundable facility fee in the amount of $12,500. The fee described in this
paragraph is in addition to any balances and fees required by the Bank or any of
its affiliates in connection with any other services now or hereafter made
available to Alkermes and/or any of its affiliates.

     3. CONCERNING THE LETTER AGREEMENT. The parties agree as follows with
respect to the Letter Agreement:

     a. That the 1997 Term Loan constitutes an "Additional Term Loan" as defined
in Section 1.5 of the Letter Agreement and is thus included within the
definitions of "Term Loan" and "Term Loans" for all purposes of the Letter
Agreement.

     b. That the 1997 Term Note constitutes an "Additional Term Note" as defined
in Section 1.5 of the Letter Agreement and is thus included within the
definitions of "Note" and "Notes" for all purposes of the Letter Agreement.
Without limitation of the foregoing provisions of this paragraph 3b and of
paragraph 3a above, the Borrowers acknowledge that the provisions of the Letter
Agreement as to payment and collection of amounts owed thereunder (including,
without limitation, Sections 1.7, 5.2 and 5.3 of the Letter Agreement) and as to
costs, expenses and charges (including, without limitation, Sections 6.1 and 6.2
of the Letter Agreement) apply to the 1997 Term Loan and to the 1997 Term Note.

     c. That the 1997 Term Loan is an "Additional Term Loan which bears interest
at a fixed rate" for the purposes of the second paragraph of Section 1.6 of the
Letter Agreement.

     d. That Section 6.6 of the Letter Agreement is hereby amended by deleting
therefrom the words "Catherine M. Bruton, Vice President" and by substituting in
their stead the following:

          "Irina Case, Assistant Vice President"

     4. CONCERNING THE SECURITY AGREEMENT. The parties agree as follows with
respect to the Security Agreement:

     a. That the 1997 Term Loan constitutes an "Additional Term Loan" for the
purposes of the Security Agreement and is thus included for all purposes within
the definition of "Obligations" appearing in Section 1 of the Security
Agreement; and that references in Section 17 of the Security Agreement, as
amended

                                        4
<PAGE>   5

hereby, to the "1997 Term Loan" will be deemed to refer to the 1997 Term Loan,
as hereinabove defined.

     b. That the 1997 Term Note constitutes an "Additional Term Note" for the
purposes of the Security Agreement and is thus included within the definition of
"Loan Documents" appearing in Section 1 of the Security Agreement.

     c. That the items listed on Exhibit 2 attached hereto are deemed to be
"Additional Loan Collateral" for the purposes of the Security Agreement and are
thus included within the definitions of "Equipment" and "Collateral" appearing
in Section 1 of the Security Agreement; and that the items listed on Exhibit 2
attached hereto shall also be deemed to be "1997 Loan Collateral" for the
purposes of Section 17 of the Security Agreement.

     d. That the equipment lists set forth in Exhibit A to the Security
Agreement are hereby amended by adding thereto (without releasing or deleting
any item shown on such lists immediately prior to the date hereof) all of the
items appearing on Exhibit 2 attached hereto.

     e. That Section 17 of the Security Agreement is hereby amended in its
entirety to read as follows:

     "17. PARTIAL RELEASE. The Secured Party agrees that, upon the satisfaction
     of the Partial Release Conditions (hereinafter defined) in relation to the
     1994 Term Loan, the 1995 Term Loan, the Ohio Term Loan or the 1997 Term
     Loan, the Secured Party will, at the Debtors' request, execute and deliver
     to the Debtors a release of the 1994 Loan Collateral or the 1995 Loan
     Collateral or the Ohio Loan Collateral or the 1997 Loan Collateral (as
     appropriate) from the lien of this Security Agreement (including
     appropriate releases on Form UCC- 3) and, upon execution and delivery of
     such release, the 1994 Loan Collateral, the 1995 Loan Collateral, the Ohio
     Loan Collateral or the 1997 Loan Collateral (as the case may be) will no
     longer be deemed 'Collateral' subject to this Security Agreement. As used
     herein, the 'Partial Release Conditions' will be deemed satisfied only if
     ALL of the following shall have occurred: (i) the 1994 Term Loan or the
     1995 Term Loan or the Ohio Term Loan or the 1997 Term Loan (as the case may
     be) shall have been paid in full, (ii) the cash and/or readily-marketable
     Government Securities pledged to the Secured Party under Section 1.8 of the
     Letter Agreement shall have an aggregate fair market

                                        5

<PAGE>   6

     value of not less than the 'Required Minimum Value' (as defined in the
     Letter Agreement) and Alkermes shall agree to maintain such pledged cash
     and/or readily-marketable Government Securities in such amount so that the
     fair market value thereof shall never be less than such 'Required Minimum
     Value' and (iii) there shall then exist no Event of Default nor any event
     or circumstance which, with the passage of time or the giving of notice or
     both, could become an Event of Default. At the time of the making of any
     Additional Term Loan, the Bank and the Debtors may, by written modification
     to this Security Agreement, set forth the circumstances, if any, under
     which a partial release may be obtained with respect to the Additional Loan
     Collateral pledged in connection with the relevant Additional Term Loan."

     5. CONCERNING THE PLEDGE. The parties agree as follows with respect to the
Pledge:

     a. That the 1997 Term Note constitutes an "Additional Term Note" as
described in Section 2 of the Pledge, with the result that the 1997 Term Note is
included within the "Loan Documents" as defined in Section 2 of the Pledge.

     b. That the 1997 Term Loan is included within the "Secured Obligations" as
defined in Section 2 of the Pledge.

     6. CONCERNING THE OHIO MORTGAGE. The parties agree that the 1997 Term Note
constitutes one of the "Other Term Notes" described in the WITNESSETH clause of
the Ohio Mortgage, with the result that the 1997 Term Loan is among the
obligations secured by the Ohio Mortgage.

     7. AMENDED DOCUMENTS. Wherever in any Financing Document, or in any
certificate or opinion to be delivered in connection therewith, reference is
made to the Letter Agreement, to the Security Agreement, to the Pledge and/or to
the Ohio Mortgage, from and after the date hereof same will be deemed to refer
to the relevant Financing Document as amended or otherwise affected hereby.

     8. REPRESENTATIONS. In order to induce the Bank to enter into this
Agreement, each Borrower represents and warrants as follows:

     a. The execution, delivery and performance of each of this Agreement and
the 1997 Term Note have been duly authorized by

                                        6

<PAGE>   7

each Borrower by all necessary corporate and other action, will not require the
consent of any third party and will not conflict with, violate the provisions
of, or cause a default or constitute an event which, with the passage of time or
the giving of notice or both, could cause a default on the part of any Borrower
under its charter documents or by-laws or under any contract, agreement, law,
rule, order, ordinance, franchise, instrument or other document, or result in
the imposition of any lien or encumbrance (except in favor of the Bank) on any
property or assets of any Borrower.

     b. Each Borrower has duly executed and delivered each of this Agreement and
the 1997 Term Note.

     c. Each of this Agreement and the 1997 Term Note is the legal, valid and
binding joint and several obligation of each Borrower, enforceable against each
Borrower jointly and severally in accordance with its respective terms.

     d. The statements, representations and warranties made in the Letter
Agreement, in the Security Agreement and/or in the other Financing Documents
continue to be correct as of the date hereof; except as amended, updated and/or
supplemented by the attached Supplemental Disclosure Schedule.

     e. The covenants and agreements of the Borrowers contained in the Letter
Agreement, in the Security Agreement and/or in the other Financing Documents
have been complied with on and as of the date hereof.

     f. No event which constitutes or which, with notice or lapse of time, or
both, could constitute, an Event of Default (as defined in the Letter Agreement)
has occurred and is continuing.

     g. No material adverse change has occurred in the financial condition of
any Borrower from that disclosed in the financial statements of Alkermes dated
December 31, 1996, heretofore furnished to the Bank.

     9. FULL FORCE AND EFFECT. Except as expressly affected hereby, the Letter
Agreement and each of the other Financing Documents remains in full force and
effect as heretofore.

     10. NO WAIVER. Nothing contained herein will be deemed to constitute a
waiver or a release of any provision of any of the Financing Documents. Nothing
contained herein will in any event be deemed to constitute an agreement to give
a waiver or release

                                        7

<PAGE>   8

or to agree to any amendment or modification of any provision of any of the
Financing Documents on any other or future occasion.

     Executed, as an instrument under seal, as of the day and year first above
written.

                                            ALKERMES, INC.
                                            
                                            
                                            By: /s/ Michael J. Landine
                                                --------------------------------
                                                Name:   Michael J. Landine
                                                Title:  Senior Vice President
                                                        and CFO
                                            
                                            
                                            ALKERMES CONTROLLED
                                            THERAPEUTICS, INC.
                                            
                                            
                                            By: /s/ Michael J. Landine
                                                --------------------------------
                                                Name:   Michael J. Landine
                                                 Title: Vice President
                                            
                                            
                                            ALKERMES CONTROLLED
                                            THERAPEUTICS INC. II
                                            
                                            
                                            By: /s/ Michael J. Landine
                                                --------------------------------
                                                Name:   Michael J. Landine
                                                 Title: Vice President
                                      

Accepted and agreed:
FLEET NATIONAL BANK


By: /s/ Matthew Moiauninger
    ----------------------------------
    Name:  Matthew Moiauninger
    Title: Vice President



                                        8

<PAGE>   9

                                    EXHIBIT 2
                                 Equipment List
                                 --------------



                                        


<PAGE>   10

<TABLE>

                                                        EXHIBIT 2
                                                  1997 LOAN COLLATERAL
                                          ALKERMES/ACTI/ACTII FIXED ASSET LIST

<CAPTION>
Date of                                                                                     Total       Less       Less        Total
Purchase   Company                      Description                           Ref #       Invoice    Freight  Sales Tax      Invoice
- ------------------------------------------------------------------------------------------------------------------------------------
<S>        <C>                          <C>                                  <C>     <C>          <C>        <C>        <C>      
ALKERMES EQUIPMENT
FY1996 (APRIL 1995-MARCH 1996)
2/26/96    Amsco (PA)                   GMP washer                            145389    95,239.00       0.00       0.00    95,239.00
2/26/96    Amsco (PA)                   Parts to GMP washer                   145390    27,654.00       0.00       0.00    27,654.00
2/28/96    Amsco Sales (NY)             Parts to GMP washer                   145625       159.19       2.94       0.00       156.25
2/29/96    Amsco Sales (NY)             Parts to GMP washer                   145678       183.62       5.54       0.00       178.08
2/29/96    Amsco Sales (NY)             Parts to GMP washer                   145654       512.50       0.00       0.00       512.50
1/16/96    Beta Star Corporation        Mdl 400 con & oq/iq prog              144682     6,925.00       0.00       0.00     6,925.00
1/9/96     Boston Ship Service          Kitchen microwave                     144031       197.40       0.00       9.40       188.00
2/9/96     Cargocaire                   Vacuum, 30565-01                      145144     2,599.00     100.00     119.00     2,380.00
1/17/96    CDW Computer Centers         Microtest discport etc.               144646       963.16      11.16       0.00       952.00
1/30/96    CDW Computer Centers         Color Inkjet                          144994       350.00       0.00       0.00       350.00
2/20/96    CDW Computer Centers         HP printer & monitor                  145737     1,230.35      23.35       0.00     1,207.00
3/14/96    CDW Computer Centers         Hard drive etc.                       146377     2,743.00       0.00       0.00     2,743.00
3/28/96    Danka Industries, Inc.       Sharp fax machine                     147040     2,369.85       0.00     112.85     2,257.00
2/21/96    Danka Industries, Inc.       Sharp fax machine                     145938     2,188.20       0.00     104.20     2,084.00
3/26/96    Data Care/Valcom             HP vectra/color monitor               146801     3,458.70      42.00     162.70     3,254.00
3/5/96     Dell Direct                  Nanao flexscan F2-21                  145909     2,104.00      75.00       0.00     2,029.00
3/7/96     Dell Direct                  Dell optiplex system                  145945     1,787.10       0.00      85.10     1,702.00
2/13/96    Hank Finkel Associates       Cart with ledges                      145324       618.13      27.61      28.12       562.40
1/19/96    Imaging Research, Inc.       Dual lamp desktop illumin.            144578     2,070.00      75.00       0.00     1,995.00
1/25/96    Imnet/Evergreen Tech.        Console to mvv opt dsl dr             144648     4,035.00       0.00       0.00     4,035.00
1/26/96    InfoTech                     Apple laserwriter                     144843     2,355.90      27.00     110.90     2,218.00
2/2/96     InfoTech                     lw 500 sheet feeder                   144957       286.20       9.00      13.20       264.00
2/2/96     MacWarehouse                 HP laserjet                           144995     1,080.00       0.00      30.00     1,050.00
1/31/96    MacWarehouse                 Powerbook etc.                        145162     4,500.00       0.00      21.00     4,479.00
2/28/96    MacWarehouse                 Powermac, keyboard, etc.              145693     7,681.00      75.00       0.00     7,606.00
2/29/96    MacWarehouse                 Netpatrol pack pro                    145794     1,282.00       3.00       0.00     1,279.00
1/4/96     Microcenter                  Apple laserwriter                     144381     2,466.45       0.00     117.45     2,349.00
2/29/96    Microtech International      8mb simms                             145694     2,252.27      20.27       0.00     2,232.00
3/15/96    Microtech International      Mia 8000/72-06 etc.                   146246     4,257.27      27.27       0.00     4,230.00
2/27/96    Microtech International      16&8mb simms                          145612     1,114.07      16.07       0.00     1,098.00
2/28/96    Nortel                       Digital line card etc.                145955     4,023.00       0.00     189.00     3,834.00
1/23/96    PCs Compleat, Inc.           Celebris gl short tower               144479     3,681.27      17.82     174.45     3,489.00
1/25/96    PCs Compleat, Inc.           16mb simms                            144643       708.45       4.95      33.50       670.00
3/20/96    PCs Compleat, Inc.           Hard drive                            146343     6,327.80      29.90     299.90     5,998.00
3/11/96    Radiometer America, Inc.     Conductivity meter etc.               146003     1,890.00       0.00       0.00     1,890.00
1/15/96    Shreve Systems               Laserwriter etc,                      144158       795.00      19.00       0.00       776.00
2/2/96     Shreve Systems               SCSI hard disk etc.                   145339     1,015.00      20.00       0.00       995.00
1/30/96    VWR Scientific               Freezer chest                         145293     5,657.00       0.00       0.00     5,657.00
3/5/96     Waters Corporation           Bus sat/in module box                 145805     2,155.00       5.00       0.00     2,150.00
</TABLE>
                                                                             
                                                                         Page 1
<PAGE>   11
<TABLE>

                                                        EXHIBIT 2
                                                  1997 LOAN COLLATERAL
                                          ALKERMES/ACTI/ACTII FIXED ASSET LIST

<S>        <C>                          <C>                                  <C>     <C>          <C>        <C>        <C>      

ALKERMES F&F                                                                 
FY1996 (APRIL 1995-MARCH 1996)                                               
2/9/96     First Office Concepts        Storage cabinet credenza              145120       730.40      29.00      33.40       668.00
1/25/96    Hank Finkel                  Tables, shelves, posts, etc.          144826     3,802.95     161.17     172.42     3,469.36
2/12/96    Hank Finkel                  Stainless steel bench                 145114     1,032.90      69.00      45.90       918.00
                                                                             
ALKERMES EQUIPMENT                                                           
FY1997 (APRIL 1996-MARCH 1997)                                               
2/28/97    AMC  Computers               2 orange PC & 2 orange window 95      155706     4,108.00      20.00       0.00     4,088.00
2/25/97    AMC  Computers               APMM Apple 20" display                155735     5,430.00     195.00       0.00     5,235.00
3/14/97    AMC  Computers               APCM4595LL/ Mac ext. keyboard/       
                                         carrycage/microsaver                 155755     5,799.00       0.00       0.00     5,799.00
3/18/97    AMC  Computers               APCM4595LL/Mac extended Keyboard II   155876    10,670.00      70.00       0.00    10,600.00
3/18/97    AMC  Computers               APCM4595LL/Mac extended Keyboard II/  
                                         Mitsubishi                           155880     7,585.00     175.00       0.00     7,410.00
9/25/96    AMC  Computers               3CN3C1667100 3com lonkbuilder         151049       855.00      10.00       0.00       845.00
10/28/96   AMC  Computers               Apple display and keyboards           152163     6,280.00      40.00       0.00     6,240.00
10/31/96   AMC  Computers               Apple PC compatibility                152162     2,020.00      10.00       0.00     2,010.00
11/25/96   AMC  Computers               Apple computer, display, keyboard     152754     8,395.00      75.00       0.00     8,320.00
1/24/97    AMC  Computers               HP LASERJET MX PRINTER W/TONER        154175     7,800.00      50.00       0.00     7,750.00
1/17/97    AMC  Computers               APCM/APPLE20"/KEYBOARD                154269    12,620.00     140.00       0.00    12,480.00
1/10/97    AMC  Computers               APCM/APPLE20"/KEYBOARD                154147     4,200.00      40.00       0.00     4,160.00
1/18/97    AMC  Computers               APCM/APPLE20"/KEYBOARD                154122     4,210.00      50.00       0.00     4,160.00
2/21/97    AMSCO                        Interface board, touch panel          154946     2,206.55      43.15       0.00     2,163.40
2/13/97    AMSCO                        P117580014/Pump                       154755     6,385.25       0.00       0.00     6,385.25
3/31/96    Bio-Rad Digilab Division     Winir system                          146717    13,360.00       0.00       0.00    13,360.00
4/2/96     Bio-Rad Digilab Division     Credit ref #146717                    152261    -4,870.00       0.00       0.00    -4,870.00
9/30/96    Biotest                      Purge Filter Assembly                 151117     7,881.40      71.40       0.00     7,810.00
3/27/96    CDW  Computer Centers        Intel Pentium Overdrive               146731       382.46      11.46       0.00       371.00
3/28/96    CDW  Computer Centers        Intel Pentium Overdrive               146736       256.33       1.33       0.00       255.00
5/23/96    CDW  Computer Centers        Visionter 16mb dell                   148275       356.66       6.66       0.00       350.00
7/10/96    CDW  Computer Centers        SEAGATE 1.00GB 11ms IDE               149330       201.00       0.00       0.00       201.00
7/31/96    CDW  Computer Centers        HP LJ 5 12PPm 600PI                   149959     1,261.65      22.65       0.00     1,239.00
9/19/96    CDW  Computer Centers        SAMSUNG 17glt                         151068       738.89      54.89       0.00       684.00
10/23/96   CDW  Computer Centers        NANAO FLEXSCAN 21IN                   151864     1,855.26      60.26       0.00     1,795.00
10/24/96   CDW  Computer Centers        SAMSUNG 17 GLI 17IN                   151870       746.92      54.92       0.00       692.00
10/24/96   CDW  Computer Centers        SAMSUNG 11GLI 17IN                    151871     1,384.00       0.00       0.00     1,384.00
11/20/96   CDW  Computer Centers        TOS 200CDS/MHZ 28.8 PCMIA             152535     4,674.67      38.67       0.00     4,636.00
6/24/96    CDW  Computer Centers        SIMPLE 8MB DEC HINOTE                 148908       157.35       5.35       0.00       152.00
6/19/96    CDW  Computer Centers        SIMPLE 16MB DEC PC LP                 148895       253.43       8.43       0.00       245.00
6/20/96    CDW  Computer Centers        MHZ 28.8 PCMCIAV.34 FAX               148896       259.83       8.83       0.00       251.00
6/7/96     CDW  Computer Centers        SEAGATE HARD DRIVE                    148668       299.00       0.00       0.00       299.00
6/11/96    CDW  Computer Centers        HP LASER 5P                           148681       879.00       0.00       0.00       879.00
5/31/96    CDW  Computer Centers        NANAO MONITOR                         148400     1,915.87      95.87       0.00     1,820.00
7/11/96    CDW  Computer Centers        4MB Dell                              147077       253.24       3.24       0.00       250.00
4/1/96     Computer  Town               Apple Mac                             146718     1,727.50      10.75      81.75     1,635.00
4/2/96     Computer  Town               4 Power macs                          146763     4,195.80       0.00     199.80     3,996.00
</TABLE>

                                                                         Page 2
<PAGE>   12
<TABLE>

                                                        EXHIBIT 2
                                                  1997 LOAN COLLATERAL
                                          ALKERMES/ACTI/ACTII FIXED ASSET LIST

<S>        <C>                          <C>                                  <C>     <C>          <C>        <C>        <C>      

6/24/96    Computer Town                SONY 17"COLOR MONITOR                 148818       853.95      15.00      39.95       799.00
6/24/96    Computer Town                APPOI HDA 320 MB SCSI                 149400       409.50       0.00      19.50       390.00
8/28/96    Cotter Corporation           Modification to WFI                   151081     3,123.80       0.00       0.00     3,123.80
2/27/97    Data Science                 Receiver system RPC-1/power supply/  
                                         start cable                          155210    11,236.01      26.01       0.00    11,210.00
3/18/97    Dell Direct Sales            Dell Dimension XPS Pentium Processor  155736     2,795.00     100.00       0.00     2,695.00
10/1/96    Dell Direct Sales            DELLPCW/MONITOR,NETWORK               151216     3,330.00     100.00       0.00     3,230.00
11/25/96   Dell Direct Sales            Pentium Pro3000mhz                    152551     3,689.00      55.00       0.00     3,634.00
3/27/96    Dell Direct Sales            Dell dimension Pentium                146818     2,323.65      55.00     110.65     2,158.00
11/26/96   Dell Direct Sales            Dimension XPS/Microsoft system/Win95  152664     2,820.30     100.00     134.30     2,586.00
2/23/96    Dictronics                   Laser facsimile machine               148273     2,792.50     325.00     117.50     2,350.00
1/23/97    Entex                        HP-HEWLET/3COM/TOSHIBA                154155    11,021.25     186.93     498.78    10,335.54
1/23/97    Entex                        Proliant 2500, energy unit etc.       154531    14,827.31     208.01     693.30    13,926.00
2/25/97    Entex                        TT-TEKTRONIX (color printer)/lower   
                                         tray assa. for phase II              155711     9,201.28     166.03     430.25     8,605.00
3/10/97    Entex                        HP-Hewlett Pack/fast ethlink/ 8x    
                                         speed CD-Rom/                        155734     1,803.55      81.05      77.50     1,645.00
12/13/96   Geneva Group                 SollomIV                              152743    45,046.09       0.00       0.00    45,046.09
4/9/96     Infotech                     Hp laserjet 5SI                       147045     4,045.95      15.00     191.95     3,839.00
4/19/96    Infotech                     Laserjet Iv plus                      147209     1,447.00       0.00       0.00     1,447.00
5/22/96    Infotech                     16 mb simms                           148159       515.15       8.00      24.15       483.00
6/17/96    Infotech                     HP DESKJET 1600CM                     148610     2,135.95      16.00     100.95     2,019.00
6/7/96     Infotech                     HP LASERJET                           148379     4,068.95      38.00     191.95     3,839.00
5/8/96     MacWarehouse                 Keyboard-compatibility cd             147934     1,232.90     118.90       0.00     1,114.00
5/29/96    MacWarehouse                 Power Mac w/scan display              148479     7,442.00       0.00       0.00     7,442.00
5/29/96    MacWarehouse                 Extended Keyboard, etc.               148480     1,654.50     135.00       0.00     1,519.50
5/30/96    MacWarehouse                 Powermac                              148481     1,026.00      27.00       0.00       999.00
5/30/96    MacWarehouse                 APPLE MULTIPLE SCAN DSPLY             148518       947.39       0.00      49.39       898.00
5/8/96     MacWarehouse                 POWER MAC & DISPLAY                   148403     9,889.00       0.00       0.00     9,889.00
7/1/96     MacWarehouse                 Extended Keyboard II                  149032       194.00      39.00       0.00       155.00
7/1/96     MacWarehouse                 Power Mac 7200                        149033     4,921.00       0.00       0.00     4,921.00
7/15/96    MacWarehouse                 Extended Keyboard + modem             149440       865.00       0.00       0.00       865.00
9/23/96    MacWarehouse                 Mitsubishi MCA640 optical drive       151069       602.00       3.00       0.00       599.00
10/16/96   MacWarehouse                 POWERPORT/MERCURY FOR POWER BOOK      151570       319.00       0.00       0.00       319.00
1/6/97     MacWarehouse                 APPLE POWERBOOK/LASERJET              154172     2,744.00       0.00       0.00     2,744.00
2/20/97    MacWarehouse                 Powermac 7300                         155085     8,196.00       0.00       0.00     8,196.00
2/20/97    MacWarehouse                 Credit ref #155085                    155733    -2,299.00       0.00       0.00    -2,299.00
2/12/97    MacWarehouse                 Fax, ethernet line                    154929     1,297.95       8.00       0.00     1,289.95
4/1/96     McMaster-Carr                Steel ladder                          146721       494.08      42.00       0.00       452.08
9/15/96    Micro Center                 Academic network center               150623     5,109.31       0.00     243.30     4,866.01
9/10/96    Micro Center                 QVS cable, scanner keyboard           150542     4,931.51       0.00     234.83     4,696.68
11/22/96   Micro-Med                    Low pressure analyzer                 152441     6,765.00       0.00       0.00     6,765.00
1/7/97     Microtech International      MIA1600/168-06PPC                     153485     1,015.91      15.91       0.00     1,000.00
4/4/96     Microtech International      Mia8000/168-06 PPC                    146781     1,808.71      18.71       0.00     1,790.00
5/8/96     Microtech International      8mb simms                             147774     2,794.59      22.59       0.00     2,772.00
5/31/96    Microtech International      MIA8000/168-06-PPC                    148294     2,405.19      21.19       0.00     2,384.00
9/25/96    Microtech International      DIMM 512k cache                       151070     1,242.94      17.94       0.00     1,225.00
</TABLE>

                                                                         Page 3
<PAGE>   13

<TABLE>

                                                        EXHIBIT 2
                                                  1997 LOAN COLLATERAL
                                          ALKERMES/ACTI/ACTII FIXED ASSET LIST

<S>        <C>                          <C>                                  <C>     <C>          <C>        <C>        <C>      

10/29/96   Microtech International      MIA1600/168-06-PPC                    151869     1,386.45      17.45       0.00     1,369.00
12/18/96   Nortel Communication         Telephones                            153230     1,742.10      20.00      82.00     1,640.10
12/9/96    Nortel Communication         M2616 perf-plus tel basic             153325       608.50      10.00      28.50       570.00
2/21/97    Northern Business Machine    Sharp fax machine                     155068     5,394.00       0.00       0.00     5,394.00
12/31/96   Osmonics                     PUMP MOTOR ELECTRIC BOILER            153415     2,070.00       0.00       0.00     2,070.00
9/19/96    PC's Compleat Inc            P133,16MBEDO win 95                   150846     2,617.90      14.95     123.95     2,479.00
6/20/96    PC's Compleat Inc            DIGITAL HINOTE ULTRA II               148736     3,198.90      49.95     149.95     2,999.00
10/24/96   PC's Compleat Inc            P133,16MBEDO/MEMORY/VIDEO             151713     4,223.60      29.90     199.70     3,994.00
12/12/96   PC's Compleat Inc            P133A, memory, modem                  153096     4,296.85      14.95     203.90     4,078.00
12/16/96   PC's Compleat Inc            Replicator, port, w/ethernet          152955       339.90       4.95      15.95       319.00
2/21/97    Orange Micro, Inc.           Orange Pc 540 PCI                     154887     6,579.10      39.70     311.40     6,228.00
12/12/96   South Hill Datacomm          4 PORT STATIONS & ADAPTERS            154313     3,756.00       0.00       0.00     3,756.00
1/14/97    Stoelting                    LAB STANDARD W/18 DEGREE EARBARS      153889     7,831.80      46.80       0.00     7,785.00
9/10/96    The Holt Company             slide proj with film                  150556       753.00       0.00       0.00       753.00
10/7/96    The Holt Company             KODAK EKTAGRAPHIC IIIA SLIDE PROJECT  151212       781.50      15.00      36.50       730.00
2/10/97    Thomas Scientific            Blender 4L 120V                       154461     1,284.76      28.76       0.00     1,256.00
6/12/96    Triumph                      PCVD1012/PCACCALPRT                   148600     1,789.80       6.90      84.90     1,698.00
12/4/96    VWR Corporation              Ambi-hi low chambers                  153086     3,810.00       0.00       0.00     3,810.00
5/10/96    Waters Corporation           In-line degasser 4 channel            147809     2,905.00       5.00       0.00     2,900.00
7/29/96    Zsource                      Ricoh SCSI scanner + drive            149559     4,764.00      18.00     226.00     4,520.00

ALKERMES F&F                                                                 
FY1997 (APRIL 1996-MARCH 1997)                                               
5/21/96    First Office Concepts        Letter Size File Cabinets             148012     2,589.50      80.00     119.50     2,390.00
5/16/96    First Office Concepts        Steel Display Cases                   148156     2,638.80      39.00     123.80     2,476.00
1/9/97     First Office Concepts        Cramer stoll                          153988       556.18      17.00      25.68       513.50
4/1/96     Hank Finkel                  Shelf & Post                          146976       166.95       6.95      21.00       139.00
1/21/97    Hank Finkel                  curt/post/caster                      154149     2,403.24     199.97     104.92     2,098.35
3/14/97    Nortel Communications        M2008HF stndrd bus tel/M2616         
                                         perf-plus tel                        155991     4,932.50      50.00     232.50     4,650.00
3/12/97    Nortel Communications        M2616 Perf-Plus Tel basic             155990     1,700.00      20.00      80.00     1,600.00
                                                                             
ALKERMES EQUIPMENT                                                           
FY1998 (APRIL 1997-MARCH 1998)                                               
4/3/97     AMC Computer Corp            Powermac                              156216     2,565.00       0.00       0.00     2,565.00
4/23/97    AMC Computer Corp            Powerbook computer                    156698     5,759.00      25.00       0.00     5,734.00
4/18/97    AMC Computer Corp            HP laserjet                           156865     3,895.00       0.00       0.00     3,895.00
4/7/97     AMC Computer Corp            Powermac                              157210     3,515.00       0.00       0.00     3,515.00
4/25/97    Carver, Inc.                 C/press model with c/base press      
                                         stand                                156728     2,809.94      64.94       0.00     2,745.00
4/10/97    Data Sciences, Inc.          Blood pressure monitoring system      156739    17,973.95      13.95       0.00    17,960.00
3/31/97    Dell Direct Sales, L.P.      Dell 6200 w/pentium                   156086     3,800.00      55.00       0.00     3,745.00
3/28/97    Dell Direct Sales, L.P.      Dell 6200 w/pentium                   156087     3,800.00      55.00       0.00     3,745.00
4/11/97    Dell Direct Sales, L.P.      Dell poweredge 2100 pentium pro base  156403     3,389.00     100.00       0.00     3,289.00
4/8/97     Entex                        Toshiba                               156359     2,888.27      37.52     135.75     2,715.00
4/2/97     Entex                        HP computer                           156361     2,529.15     122.05     110.10     2,297.00
3/31/97    Fisher Scientific            Freezer storage flame material        156080     2,792.00       0.00       0.00     2,792.00
5/5/97     Genevea Group                GB ultra wide swapable drive, PCI    
                                         controller                           156609     5,761.47      25.00     273.17     5,463.30

</TABLE>

                                                                         Page 4
<PAGE>   14
<TABLE>

                                                        EXHIBIT 2
                                                  1997 LOAN COLLATERAL
                                          ALKERMES/ACTI/ACTII FIXED ASSET LIST

<S>        <C>                          <C>                                  <C>     <C>          <C>        <C>        <C>      

4/28/97    Harvard Apparatus            Multi-syr pump 22                     156720     4,204.38      14.38       0.00     4,190.00
4/23/97    Kinematic AG                 Dispersing and homogenizing unit      156262     5,941.65       0.00       0.00     5,941.65
3/31/97    La Calhene                   Replacement canopy for two half      
                                         suit isolator                        156040     7,994.15      59.15       0.00     7,935.00
4/24/97    McMaster-Carr                Stainless steel scullery sink         156881     2,381.15      40.00       0.00     2,341.15
4/21/97    Micro Motion                 Sensor and transmitter                156401     6,835.20      20.00       0.00     6,815.20
4/10/97    Microtech International      Memory for computers                  156800     3,705.36      25.36       0.00     3,680.00
4/7/97     Shreve Systems               500 MB internal 3.5 harddrives        156471     4,650.00      70.00       0.00     4,580.00
4/7/97     Sonics & Materials, Inc.     100 watt system                       156461     2,232.19      12.19       0.00     2,220.00
4/28/97    VWR Corporation              Balances                              157269     6,181.45       0.00       0.00     6,181.45
4/16/97    Waters Corporation           In-line degasser 4-channel            156426     3,005.00       5.00       0.00     3,000.00
                                                                                    ------------------------------------------------
TOTAL ALKERMES                                                                         720,029.00   5,712.95   7,991.46   706,324.59
                                                                                    ------------------------------------------------
                                                                             
ACTI EQUIPMENT                                                               
FY1996 (APRIL 1995-MARCH 1996)                                               
2/13/96    Accutemp Engineering         Watlow microprocessor, et               5250     2,722.15      45.68       0.00     2,676.47
1/30/96    Alloy Products Corp.         7 Gal Tank w/misc parts                 5189     3,670.40      16.40       0.00     3,654.00
2/13/96    Alloy Products Corp.         14 gal vessel                           5254     3,754.27      54.27       0.00     3,700.00
2/16/96    Amsco Sales (NY)             Valve-part of Cooler                    5244       323.48       3.62       0.00       319.86
1/8/96     AMSCO-PA                     H202 case                               5078       788.00       0.00       0.00       788.00
1/8/96     Avestin, Inc.                High pressure homo. mach                5051    13,030.00     160.00       0.00    12,870.00
3/18/96    Chisholm Corp.               Palltronic filter tester                5454    15,750.00       0.00       0.00    15,750.00
2/15/96    Chisholm Corporation         Water/moisture trap                     5255       160.52      10.52       0.00       150.00
2/16/96    Cole-Parmer                  Humidity data processor                 5245       976.70       6.70       0.00       970.00
3/7/97     Cole-Parmer                  Humidity data processor                 5365     2,024.15      29.15       0.00     1,995.00
1/15/96    Cotter Corporation           WFI tank upgrade project                5042    12,849.72       0.00       0.00    12,849.72
2/9/96     Cotter Corporation           Add ferrule 40l vessel                  5220     2,848.00       0.00       0.00     2,848.00
2/27/96    Harvard Apparatus            Multi syringe pump                      5310     2,631.37       6.37       0.00     2,625.00
3/6/96     IKA Works, Inc.              Homogenizer motor                       5368     2,399.58      11.58       0.00     2,388.00
3/1/96     ITT Sherotec                 Valves for tanks                        5333     9,131.43      14.83       0.00     9,116.60
January    La Calhene                   Platine for clean room                144898    33,447.00       0.00       0.00    33,447.00
4/11/96    La Calhene                   Isolator walls                          5639    22,824.30       0.00       0.00    22,824.30
3/27/96    MKS Instruments              Barratron pressure transducer           5500     4,931.48      11.48       0.00     4,920.00
2/29/96    Osmonics                     Steam generator                         5621    60,278.50       0.00       0.00    60,278.50
1/1/96     Pacific Venture              Lease 8142N                             4984     2,897.00       0.00       0.00     2,897.00
2/8/96     Process Instrumentation      Temp callibrator w/access               5356     3,555.00       5.00       0.00     3,550.00
2/22/96    Sonics & Materials           Ultrasonic Processor etc.               5302     7,343.45      28.45       0.00     7,315.00
1/17/96    Superior Controls            Prolease 50 data acq.system             5084     7,827.00       0.00       0.00     7,827.00
2/9/96     Superior Controls            Prolease 50 data acq.system             5266     7,969.60       0.00       0.00     7,969.60
3/6/96     Superior Controls            Prolease 50 data acq.system             5376     5,218.00       0.00       0.00     5,218.00
3/25/96    Superior Controls            Prolease 50 data acq.system             5517     1,500.00       0.00       0.00     1,500.00
3/25/96    Superior Controls            Prolease 50 data acq.system             5518     7,969.60       0.00       0.00     7,969.60
1/18/96    Telsonic, USA                Ultrasonic generator, etc.              5089     2,910.00      35.00       0.00     2,875.00
                                                                             
</TABLE>

                                                                         Page 5
<PAGE>   15
<TABLE>

                                                        EXHIBIT 2
                                                  1997 LOAN COLLATERAL
                                          ALKERMES/ACTI/ACTII FIXED ASSET LIST

<S>        <C>                          <C>                                  <C>     <C>          <C>        <C>        <C>      

ACTI F&F                                                                     
FY1996 (APRIL 1995-MARCH 1996)                                               
1/22/96    Hank Finkel                  Table                                    670       908.24      76.64      39.60       792.00
2/23/96    Hank Finkel                  Shelf & Post                            5311       166.26      19.00       7.01       140.25
2/27/96    Hank Finkel                  Shelf & Post                            5324       166.00      19.00       7.00       140.00
3/7/96     Hank Finkel                  Standard Utility Cart                   5381       465.58      22.48      21.10       422.00
2/27/96    Terra Universal, Inc.        Blue Upholstered Chair                  5340     1,677.00      67.00       0.00     1,610.00

ACTI EQUIPMENT                                                               
FY1997 (APRIL 1996-MARCH 1997)                                               
1/8/97     Alleghency Bradford Corp     Heat exchanger                          8231    10,427.00       0.00       0.00    10,427.00
2/5/97     Alloy Products Corp          Vessel 14 Gal ASME T-316                8560     8,865.72      85.72       0.00     8,780.00
4/9/96     Alloy Products Corp          14 gal vessel                           5630     7,784.27      54.27       0.00     7,730.00
7/11/96    Amsco Sales Corp             1 316l SS TC PRESSURE REG               6318     1,966.59      10.03       0.00     1,956.56
3/31/96    Anatel Corporation           Analyzer                                5569    16,998.62       3.62       0.00    16,995.00
2/11/97    Apache Stainless Equipment   37.4 18" Vessel                         8591     4,390.00       0.00       0.00     4,390.00
1/13/97    Avestin, Inc.                EmulsiFlex-C50 high pressure            8315    23,040.00     290.00       0.00    22,750.00
4/4/96     Avestin, Inc.                Homogenizer/Transducer                  5597    25,980.00     320.00       0.00    25,660.00
6/25/96    Beta-Star Corp               MODEL #400 CONTROL                      6429    13,075.00       0.00       0.00    13,075.00
6/25/96    Beta-Star Corp               ADDITIONAL PARTS MODEL #400             6428     6,326.44       0.00       0.00     6,326.44
5/16/96    Bio-Rad Digilab Div.         Automatic temp controller               5827     4,870.00       0.00       0.00     4,870.00
6/13/96    Boston Ship Service          1810 Fridge                             5980       525.00       0.00       0.00       525.00
1/10/97    Chemineer Inc                CAT-10 static mixer                     8321     3,978.18      18.18       0.00     3,960.00
6/11/96    Cole-Parmer Instrument       PUMP MFLEX V-FLO                        6050     2,650.00       0.00       0.00     2,650.00
7/25/96    Cole-Parmer Instrument       VAC PUMP                                6524     2,777.60     227.60       0.00     2,550.00
2/28/97    Cotter Corporation           Modify Glove Box Isolator small         8787     1,475.00       0.00       0.00     1,475.00
3/20/96    Cotter Corporation           Pressure control valve                  5659     2,819.00       0.00       0.00     2,819.00
10/16/96   Cotter Corporation           Modification to SS Isolator unit        7602     5,900.00       0.00       0.00     5,900.00
11/14/96   Cotter Corporation           FAB. SC Middle per 10/23/96 skecth      7830     1,395.00       0.00       0.00     1,395.00
1/23/97    Cotter Corporation           FAB. bottom collection tank             8402     4,650.00       0.00       0.00     4,650.00
1/23/97    Cotter Corporation           10".4" can red top insulated            8401     5,750.00       0.00       0.00     5,750.00
3/21/97    Cotter Corporation           Modify glove box isolator small         9148     2,175.00       0.00       0.00     2,175.00
2/4/97     Edwards High Vacuum          B Pump E2M18                            8542     2,815.59     200.59       0.00     2,615.00
6/19/96    Edwards High Vacuum          VACUUM PUMP W/RUBBER                    6110     3,030.79      50.79       0.00     2,980.00
3/24/97    Exeter Analytical, Inc.      CE440 element analyzer & start up kit   8954    30,450.00     125.00       0.00    30,325.00
9/23/96    Fisher Scientific            Incubator MDL 815 220VAC 50HZ           7163     2,295.00       0.00       0.00     2,295.00
9/27/96    Fisher Scientific            Digital Chart Recorder 115V             7398     2,235.00       0.00       0.00     2,235.00
10/8/96    Fisher Scientific            Incubator MDL 815 220VAC                7407     4,590.00       0.00       0.00     4,590.00
11/20/96   Fisher Scientific            Blood bk ref 12cu ft 115v               7851     2,815.00       0.00       0.00     2,815.00
11/4/96    FTS Systems, Inc             pump circulating                        7805     1,508.45       0.00       0.00     1,508.45
7/26/96    FTS Systems, Inc             RC211,208V AIR COOLED                   6526    13,200.00       0.00       0.00    13,200.00
4/8/96     FTS Systems, Inc             Secondary Key temp                      5615    13,685.00       0.00       0.00    13,685.00
6/18/96    Glen Mills Inc               TURBULA SHAKER                          6108     7,400.00       0.00       0.00     7,400.00
10/31/96   Glen Mills Inc               Turbula Shaker-Mixer Model T2C          7582     7,600.00       0.00       0.00     7,600.00
9/18/96    Harvard Apparturs Inc        Pump 22 Multi-SYR                       6953     2,002.06       7.06       0.00     1,995.00

</TABLE>

                                                                        Page 6
<PAGE>   16
<TABLE>

                                                        EXHIBIT 2
                                                  1997 LOAN COLLATERAL
                                          ALKERMES/ACTI/ACTII FIXED ASSET LIST

<S>        <C>                          <C>                                  <C>     <C>          <C>        <C>        <C>      

7/11/96    Hewlett Packard              Flouresence detector & kits +        
                                         installation                           7210    12,624.00       0.00       0.00    12,624.00
12/13/96   IKA-Works, Inc.              Dispersing Tool                         8162     1,679.35       8.35       0.00     1,671.00
3/4/96     IKA-Works, Inc.              Homogenizer                             5553     3,355.76      13.76       0.00     3,342.00
4/9/96     Infotech                     HP laserjet 51                          5603       964.45      52.00      43.45       869.00
4/9/96     Infotech                     HP laserjet 5L                          5619     1,846.90      22.00      86.90     1,738.00
5/24/96    ITT Sherotec                 SC Chamber                              5926     5,675.98      35.98       0.00     5,640.00
6/13/96    ITT Sherotec                 FD TOP-DRAWING 320EP                    6082    26,053.45      55.45       0.00    25,998.00
6/17/96    ITT Sherotec                 DISPENSER TANK 2PCX                     6109     9,302.05      73.25       0.00     9,228.80
6/18/96    ITT Sherotec                 DISPENSER TANK 2PCS                     6129    18,570.60     113.00       0.00    18,457.60
5/24/96    ITT Sherotec                 TANK BOTTOM VALVE ADDITION              5942    22,359.02      24.02       0.00    22,335.00
10/11/96   Jouan Inc                    Bench top centerfuge & accessories      7377     6,686.36      86.36       0.00     6,600.00
5/17/96    La Calhene                   Alum autoclavable container             5794     8,992.00       0.00       0.00     8,992.00
5/21/96    La Calhene                   Containment isolator                    5910    11,761.80       0.00       0.00    11,761.80
6/19/96    La Calhene                   ALUM. AUTOCLAV CONTAINER                6133    15,144.00       0.00       0.00    15,144.00
5/14/96    La Calhene                   Contamination isolatorw/four gloves   151251    23,523.60       0.00       0.00    23,523.60
10/17/96   La Calhene                   Replacement canopy                      7401    15,667.00       0.00       0.00    15,667.00
10/17/96   La Calhene                   Replacement canopy                      7402    15,667.00       0.00       0.00    15,667.00
11/25/96   La Calhene                   Glove leak tester                       7914    15,000.00       0.00       0.00    15,000.00
3/18/97    La Calhene                   Replacement canopy work station         8965     4,452.00       0.00       0.00     4,452.00
3/11/97    La Calhene                   Rigid wall turbulent flow &          
                                         accessories                            9192     3,920.60       0.00       0.00     3,920.60
1/31/97    La Calhene                   Half suite, diameter, PVC, sleeve       8566     8,217.50      81.50       0.00     8,136.00
4/22/96    Lightnin                     Mixer w/various parts                   5714    19,509.26      77.28       0.00    19,431.98
10/30/96   Lightnin                     Baldor Fear motor/ control              7600       707.75      34.75       0.00       673.00
11/25/96   McMaster-Carr                voltagespike,surge and recorder         7866     1,106.94       3.28       0.00     1,103.66
1/8/97     Micro Diagnostics            Stainless steel rotameter               8392     3,808.73       0.00       0.00     3,808.73
6/3/96     Millipore Corporation        INTEGRAL 316 ISOLATOR                   5939     7,000.00       0.00       0.00     7,000.00
6/25/96    Millipore Corporation        Milliflex sensor II 115V                7261     3,005.00       5.00       0.00     3,000.00
2/26/97    Millipore Corporation        Milliflex sensor II 115V                8810     3,000.00       0.00       0.00     3,000.00
7/11/96    Millipore Corporation        Milliflex sensor II 115V                6324     3,000.00       0.00       0.00     3,000.00
9/4/96     MKS Instruments              Baratron absolute pressure           
                                         transducer                             6984     1,680.90      10.90       0.00     1,670.00
10/19/96   MKS Instruments              628A11TAE/A070-92                       7397     1,681.03      11.03       0.00     1,670.00
9/12/96    National Instrument          Labview dev. for Macintosh              7049     3,316.75      26.75       0.00     3,290.00
2/24/97    Nettco Corporation           Nettco model 18P, motor, ac drive,   
                                         stirre                                 8832    25,883.00     113.00       0.00    25,770.00
5/2/96     Nettco Corporation           1BP mixer                               5725    33,855.48     189.48       0.00    33,666.00
8/6/96     Novex                        Power ease 500 Pre-Ca                   6683     1,531.00      46.00       0.00     1,485.00
3/31/97    Osmonics, Inc.               Generator 10% due from 2/29/96          9204     4,139.00       0.00       0.00     4,139.00
11/21/96   OTT Process Equipment        etra ac drive nema 4                    7754     1,533.00      73.00       0.00     1,460.00
9/6/96     Pall Filtron Corporation     5k omega centrasette                    7021    10,726.33       4.33       0.00    10,722.00
9/12/96    Pall Filtron Corporation     Sanitart centrasette +mutiples          6905    55,250.00       0.00       0.00    55,250.00
9/18/96    Pall Filtron Corporation     Integrity analyzer                      7408     5,400.00       0.00       0.00     5,400.00
10/2/96    Pall Filtron Corporation     5K omega centresette 25SQ T-screen      7258     5,364.63       3.63       0.00     5,361.00
3/14/97    Pall Filtron Corporation     Maximate ext SS cassette holder/ open 
                                         channel 4ft                            8995    13,991.26     141.26       0.00    13,850.00
12/4/96    Pharmacia Biotech            Superdex 75                             7964     5,896.00      56.00       0.00     5,840.00
8/22/96    Phenomenex                   CH-mult. column heater                  6770     1,480.00       0.00       0.00     1,480.00

</TABLE>

                                                                        Page 7
<PAGE>   17

<TABLE>

                                                        EXHIBIT 2
                                                  1997 LOAN COLLATERAL
                                          ALKERMES/ACTI/ACTII FIXED ASSET LIST

<S>        <C>                          <C>                                  <C>     <C>          <C>        <C>        <C>      
11/22/96   Precision Stainless, Inc.    50 liter portable mix tanks             8036     2,817.00       0.00       0.00     2,817.00
2/28/97    Precision Stainless, Inc.    100 liter portable mix tank &        
                                         accessories                            9191    17,459.00       0.00       0.00    17,459.00
1/24/97    Sigmil Ltd                   Meissner housing w/steam jacket         8417     2,311.90      29.90       0.00     2,282.00
6/21/96    Sonics & Materials, Inc      50W ultrasonic atomizer                 6151     2,038.61       8.61       0.00     2,030.00
2/17/97    Sonics & Materials, Inc      40 KHZ atomizer & horn                  8700     2,883.28      13.28       0.00     2,870.00
10/22/96   Sonics & Materials, Inc      Ultrasonic processor/atomizing          7561     3,784.20      14.20       0.00     3,770.00
8/14/96    Spex CertiPrep               Freezer mill/microvial set              6699     3,530.94       5.94       0.00     3,525.00
10/29/96   Steri Technologies           Bottom valves                           7756    12,737.68      53.68       0.00    12,684.00
11/26/96   Summit Machine Builders      4107 console & start up system          8269     2,110.90       0.00       0.00     2,110.90
2/12/97    Summit Machine Builders      Precision netweight filler              8728     5,059.00       0.00       0.00     5,059.00
2/28/97    Summit Machine Builders      4107 console/power cord/             
                                         electricswitch etc                     9138     5,059.00       0.00       0.00     5,059.00
9/11/96    Superior Controls, Inc       Prolease 500 data acquisition system  150707     6,340.00       0.00       0.00     6,340.00
6/18/96    Superior Controls, Inc       Prolease 500 data acquisition system    6215     2,720.00       0.00       0.00     2,720.00
6/18/96    Superior Controls, Inc       Prolease 500 data acquisition system    6216     3,470.00       0.00       0.00     3,470.00
2/11/97    Superior Controls, Inc       Prolease 500 data acquisition system    8762    13,812.00       0.00       0.00    13,812.00
4/15/96    Superior Controls, Inc.      Prolease 500 data acquisition system    5622     1,080.00       0.00       0.00     1,080.00
4/15/96    Superior Controls, Inc.      Prolease 500 data acquisition system    5623     2,609.00       0.00       0.00     2,609.00
4/15/96    Superior Controls, Inc.      Prolease 500 data acquisition system    5772     3,984.80       0.00       0.00     3,984.80
3/13/97    Superior Controls, Inc.      Prolease 500 data acquisition system    9037       670.00       0.00       0.00       670.00
3/19/97    Superior Controls, Inc.      Prolease 500 data acquisition system    9188     6,906.00       0.00       0.00     6,906.00
3/13/97    Superior Controls, Inc.      Prolease 500 data acquisition system    9190    10,359.00       0.00       0.00    10,359.00
9/30/96    Vorti-Siv Division           Vorti-Sivmodel /Dome cover w/ lock   
                                         band/FDA white rubber feet             7475     4,085.00     250.00       0.00     3,835.00
9/30/96    Vorti-Siv Division           Vorti-Sivmodel RBF-10/               
                                         screens.shallow funnel                 7485     3,825.00       0.00       0.00     3,825.00
8/28/96    Vorti-SixDivision            140 mexh s.s. screns + multiples        6889     1,371.98      10.98       0.00     1,361.00
4/29/96    VWR Scientific               Freezer chest                           5716     6,930.84       0.00       0.00     6,930.84
5/20/96    VWR Scientific               Ambi-hi-low chamber                     5841     1,905.00       0.00       0.00     1,905.00
11/25/96   VWR Scientific               Vessel, bioprcess w/ DRN/            
                                         mixer/ shaft                           7872    11,261.46       0.00       0.00    11,261.46
11/8/96    VWR Scientific               Bioprocess vessel                       7675     2,060.42       0.00       0.00     2,060.42
11/14/96   VWR Scientific               Lab-line-HI-LO incubator                7834     1,905.00       0.00       0.00     1,905.00
1/14/97    VWR Scientific               Bal semi-mcro balance                   8336     2,996.25       0.00       0.00     2,996.25
2/11/97    VWR Scientific               Bath large MOD 270                      8663     1,773.08       0.00       0.00     1,773.08
10/28/96   Washburn-Garfield Corp.      Butterfly valve & accessories           7503     1,375.24      24.94       0.00     1,350.30
7/24/96    Waters Corporation           486 TUNABLE UV/VIS                      6527     7,287.17       7.17       0.00     7,280.00
8/12/96    Waters Corporation           2690 W/Vac degaas/heat cooler           6626    26,875.00      30.00       0.00    26,845.00
8/19/96    Waters Corporation           410 differential refractomer            6717     8,283.75      83.75       0.00     8,200.00
11/21/96   Waters Corporation           2020 Alpha/open VMS                     7887    46,211.32      11.32       0.00    46,200.00
2/26/97    Waters Corporation           W/Vac degas, tunable, scan,          
                                         fluorometter etc.                      8836   120,380.20      84.70       0.00   120,295.50
3/19/97    Waters Corporation           2 custom 2020 Alpha server hardware     9091    60,185.99     185.99       0.00    60,000.00
                                                                             
ACTI F&F                                                                     
FY1997 (APRIL 1996-MARCH 1997)                                               
4/17/97    Hank Finkel                  Wire carts                              5638       895.98      39.49      40.79       815.70
5/1/96     Hank Finkel                  Shelves                                 5739     1,594.26      71.86      72.50     1,449.90
9/27/96    Hank Finkel                  Shelves                                 7360     3,088.64     146.91     140.08     2,801.65
11/27/96   Hank Finkel                  Shelves                                 7877     1,016.41      76.76      44.75       894.90
</TABLE>

                                                                        Page 8
<PAGE>   18
<TABLE>

                                                        EXHIBIT 2
                                                  1997 LOAN COLLATERAL
                                          ALKERMES/ACTI/ACTII FIXED ASSET LIST

<S>        <C>                          <C>                                  <C>     <C>          <C>        <C>        <C>      


12/17/96   Hank Finkel                  Shelves                                 8135     1,556.96      75.78      70.53     1,410.65
1/7/97     Hank Finkel                  Shelves                                 8393     1,806.70     193.06      76.84     1,536.80
1/31/97    Hank Finkel                  Shelves                                 8502     2,334.13     219.43     100.70     2,014.00
                                                                                    ------------------------------------------------
TOTAL ACTI                                                                           1,373,636.66   5,035.14     751.25 1,367,850.27
                                                                                    ------------------------------------------------
                                                                             
ACTII EQUIPMENT                                                              
FY1997 (APRIL 1996-MARCH 1997)                                               
9/25/96    Alloy Products Corp          Vessel 4 liter ASME electro polish      2278     4,264.22      10.22       0.00     4,254.00
9/19/96    Alloy Products Corp          Vessel 19 liter ASME electro polish     2277     1,434.43       5.43       0.00     1,429.00
2/14/97    AMC Computers                HPCD422 multiples                       4208     3,185.00      20.00       0.00     3,165.00
10/1/96    Applied Reactor              1-gallon reactor                        2728    18,100.00       0.00       0.00    18,100.00
2/7/97     Applied Reactor              Speciality polymer reactor              4238    18,245.00     145.00       0.00    18,100.00
2/26/97    Biotest Diagnostics          Air sampler RCS plus/battery         
                                         recharger                              4398     3,584.68      33.68     201.00     3,350.00
2/11/97    Cintron Scale                Scientific scale                        4314     4,983.87      15.87       0.00     4,968.00
11/25/96   Coulter                      Optical bench                           3100    49,160.00     160.00       0.00    49,000.00
12/10/96   Coulter                      Credit, apply to ref #3100              3441    -6,907.17    -407.17       0.00    -6,500.00
8/14/96    Data Comm Warehouse          Micro transceiver w/RJ45                1905     2,230.84       4.95     125.99     2,099.90
2/21/97    DCI, Inc.                    Round vertical insulated tanks          4277    47,779.50       0.00       0.00    47,779.50
3/12/97    DCI, Inc.                    Round vertical insulated tanks          4731    11,133.00       0.00       0.00    11,133.00
11/9/96    Engineering Excellence       Part F.S>G. crtl                        4266     1,723.63       0.00       0.00     1,723.63
4/8/96     Exergy                       Heat exchanger                           207       961.30      11.30       0.00       950.00
12/4/96    Fisher Scientific            Viscosity bath 120V                     3194     3,518.00       0.00       0.00     3,518.00
5/14/97    Fluke                        Data logger, etc.                        512     3,403.17      11.34     176.83     3,215.00
6/5/96     Hewlett Packard              AUTOSAMPLER/SIPPER                       832     6,335.00       0.00       0.00     6,335.00
6/18/96    Infotech                     HP laserjet                             1174     4,048.95      18.00     191.95     3,839.00
11/7/96    Infotech                                                             2900     2,039.70       9.00      96.70     1,934.00
11/22/96   Infotech                     CMPQ 2.1GB F/W hot swap/COMPAQ 64MB     3161     2,053.70      23.00      96.70     1,934.00
12/12/96   Infotech                     KNGSTN 64 MB UPG                        3472       721.95       9.00      33.95       679.00
10/23/96   Jay Instrument               Honeywell pressure transmitter          2802     1,245.00       0.00       0.00     1,245.00
6/12/96    Koch Engineering             Equipment static mixer                   942     1,006.70       6.70       0.00     1,000.00
6/4/96     Lightnin                     Mixer final asy ts w/o comp          
                                         intfc 110V                              831     1,195.80       4.80       0.00     1,191.00
2/5/97     List Inc                     Engineering design of list DTB unit     4312    20,000.00       0.00       0.00    20,000.00
3/29/96    MacWarehouse                 Apple computer/keyboard                  217     3,127.06      76.00     159.06     2,892.00
4/9/96     MacWarehouse                 Apple laserwriter printer                492     4,602.89       0.00     252.89     4,350.00
5/8/96     MacWarehouse                 Extended keyboard                        673     1,606.44     148.94      82.50     1,375.00
5/8/96     MacWarehouse                 Apple laserwriter printer,           
                                         multi-scan display                      824     8,951.70       0.00     506.70     8,445.00
5/30/96    MacWarehouse                 Applevision 1710 & display               857     3,893.38       0.00     220.38     3,673.00
5/30/96    MacWarehouse                 KEYBOARD & TRANSCE                       854     1,194.80     103.00      61.80     1,030.00
6/4/96     MacWarehouse                 INTERNET ROUTER                          898     1,407.50       3.00      79.50     1,325.00
5/30/96    MacWarehouse                 Modem, keyboard                          879       820.00       0.00       0.00       820.00
7/29/96    MacWarehouse                 IOMEGA 1GB JAZ DRIVE 3.5"               1546       475.00       0.00       0.00       475.00
7/16/96    MacWarehouse                 Power MAC 7200/75, multi-scan 15SF      1431     3,422.00       0.00       0.00     3,422.00
7/5/96     MacWarehouse                 Multiscan 15SF II                       1357     1,586.82       0.00      89.82     1,497.00
7/1/96     MacWarehouse                 Extended keyboard II                    1265       369.58      40.98      18.60       310.00

</TABLE>

                                                                        Page 9
<PAGE>   19
<TABLE>

                                                        EXHIBIT 2
                                                  1997 LOAN COLLATERAL
                                          ALKERMES/ACTI/ACTII FIXED ASSET LIST

<S>        <C>                          <C>                                  <C>     <C>          <C>        <C>        <C>      

2/27/97    MacWarehouse                 PowerMac 7300/200                       4518     5,398.00       0.00       0.00     5,398.00
2/12/97    MacWarehouse                 On line fax/1 line exthernet            4564     1,253.50       8.00      70.50     1,175.00
2/20/97    MacWarehouse                 Powerbook 3400c/200 16MB                4565    10,550.00       0.00       0.00    10,550.00
6/17/96    McCormick Equipment          WIRE MESH PARTITION                      951     3,473.00      90.00       0.00     3,383.00
2/11/97    Met One                      Model A2408 2 channel                   4311     5,773.12      23.12       0.00     5,750.00
3/4/97     MicroWarehouse               MSFT Project F/Win95/JMP Statistical    4617     1,091.10      11.20       0.00     1,079.90
9/16/96    New Brunswick science        Utility tray,repair INNOVA 400          2245     4,812.02     112.02       0.00     4,700.00
1/16/97    Sharp Electronics            Copier                                  3921     1,154.34       0.00      65.34     1,089.00
1/16/97    Sharp Electronics            Copier                                  3922     2,452.84       0.00     138.84     2,314.00
1/16/97    Sharp Electronics            Copier                                  3923     3,888.08       0.00     220.08     3,668.00
1/16/97    Sharp Electronics            Duplexer                                3924       590.42       0.00      33.42       557.00
2/28/97    Sharp Electronics            Laser fax                               4525     2,912.54     225.00     190.54     2,497.00
2/28/97    Sharp Electronics            Laser fax                               4526     2,912.54     225.00     190.54     2,497.00
6/11/96    South Hills Datacomm         Network access point w/antenna          1025     2,800.35       0.00     133.35     2,667.00
9/6/96     TA Instruments, Inc.         Module 2010/thermal analyst/monitor     2928    20,005.37      55.37       0.00    19,950.00
3/27/97    TA Instruments, Inc.         Refrigerated cooling system             4631     8,187.30      62.30       0.00     8,125.00
5/9/96     VWR Scientific               Orbital shaker                           885     1,207.50       0.00       0.00     1,207.50
10/30/96   VWR Scientific               Centifuge centra-GP8                    2856     3,611.40       0.00       0.00     3,611.40
10/8/96    VWR Scientific               Orbit environ shaker                    2971     3,263.19       0.00       0.00     3,263.19
11/14/96   VWR Scientific               Rotor horizontal                        3021     2,628.60       0.00       0.00     2,628.60
2/24/97    VWR Scientific               Orbital shaker open air                 4210     1,417.07       0.00       0.00     1,417.07
10/16/96   VWR Scientific               Turbidimeter DRT-100B                   2674     1,307.90       0.00       0.00     1,307.90
12/11/96   VWR Scientific               Buchi rotap                             3317     3,513.75       0.00       0.00     3,513.75
9/5/96     VWR Scientific               Pump syringe sage mod m362              2063     1,743.30       0.00       0.00     1,743.30
2/4/97     Waters Corporation           410 differential refractomer            4300     8,212.28      12.28       0.00     8,200.00
12/31/96   Waters Corporation           410 differential refractomer            4512     8,269.40      12.00     467.40     7,790.00
                                                                             
ACTII F&F                                                                    
FY1997 (APRIL 1996-MARCH 1997)                                               
11/15/96   First Office Concepts, Inc   High back task seating                  1844     3,215.00      25.00       0.00     3,190.00
8/13/96    First Office Concepts, Inc   Guest chairs                            1845     4,705.00      50.00       0.00     4,655.00
10/22/96   First Office Concepts, Inc   Corner end table-freestanding           2659       308.45      39.00       0.00       269.45
8/12/96    First Office Concepts, Inc   4 drawe vertical filing                 2546       330.00      50.00       0.00       280.00
10/1/96    First Office Concepts, Inc   High back task seating                  2432     4,689.25      40.00       0.00     4,649.25
8/13/96    First Office Concepts, Inc   Lateral file cabinet w/locks            2968     1,500.50      65.50       0.00     1,435.00
2/6/97     Nortel Communications        Telephone system installation           3844    16,197.00       0.00       0.00    16,197.00
3/21/97    Nortel Communications        Telephone system installation           4847     6,479.00       0.00       0.00     6,479.00
3/21/97    Nortel Communications        Telephone system installation        Accrued    42,113.00       0.00       0.00    42,113.00
9/9/96     Superior Carpet              Carpet installation                     2224     3,387.65       0.00     191.75     3,195.90
                                                                                    ------------------------------------------------
TOTAL ACTII                                                                            432,257.20   1,558.83   4,096.13   426,602.24
                                                                                    ------------------------------------------------
                                                                             
                                                                                    ------------------------------------------------
 GRAND TOTAL ALKERMES, ACTI AND ACTII                                                2,525,922.86  12,306.92  12,838.84 2,500,777.10
                                                                                    ================================================
                                                                            
</TABLE>

                                                                       Page 10
<PAGE>   20



                        SUPPLEMENTAL DISCLOSURE SCHEDULE


                         [To be provided by Borrowers.]




<PAGE>   21


                                   Item 2.1(m)
                                   -----------

                  Material Contracts and Long-Term Commitments

1.   Form of 1992 Warrant to purchase 2,800 shares of Alkermes, Inc.'s Common
     Stock.

2.   Form of 1995 Warrant to purchase 300 shares of Alkermes, Inc.'s Common
     Stock.

3.   Form of Global Warrant Certificate for 1994 Class A Warrants to purchase
     1,700 shares of Alkermes, Inc.'s Common Stock.

4.   Form of Class B 1994 Warrant to purchase 3,400 shares of Alkermes, Inc.'s
     Common Stock.

5.   Form of Fund Warrant to purchase 7,293 shares of Alkermes, Inc.'s Common
     Stock.

6.   Form of Incentive Warrant to purchase 42,280 shares of Alkermes, Inc.'s
     Common Stock.

7.   Warrant Agreement, dated as of November 18, 1994, by and between Alkermes,
     Inc. and The First National Bank of Boston.

8.   Amended and Restated 1989 Non-Qualified Stock Option Plan, as amended.

9.   Amended and Restated 1990 Omnibus Stock Option Plan, as amended.

10.  1991 Restricted Common Stock Award Plan.

11.  1992 Non-Qualified Stock Option Plan.

12.  Stock Option Plan for Non-Employee Directors.

13.  Lease, dated as of September 18, 1991, between Forest City 64 Sidney
     Street, Inc. and Alkermes, Inc., as amended by a First Amendment of Lease
     dated September 1, 1992.

14.  Lease, dated as of March 16, 1990, between Forest City 64 Sidney Street,
     Inc. and Enzytech, Inc.

<PAGE>   22

15.  Product Development Agreement, dated as of March 6, 1992, between Alkermes
     Clinical Partners, L.P. and Alkermes, Inc.

16.  Purchase Agreement, dated as of March 6, 1992, by and among Alkermes, Inc.
     and each of the Limited Partners, from time to time, of Alkermes Clinical
     Partners, L.P.

17.  Alkermes Clinical Partners, L.P. Agreement of Limited Partnership, dated as
     of February 7, 1992, as amended by Amendment No. 1 to Agreement of Limited
     Partnership, dated as of September 29, 1992, as further amended by
     Amendment No. 2 to Agreement of Limited Partnership, dated as of March 30,
     1993.

18.  Class A Note of Alkermes Development Corporation II, dated April 10, 1992,
     to PaineWebber Development Corporation in the amount of $100.00.

19.  License Agreement, dated February 5, 1990, between Enzytech, Inc. and
     Massachusetts Institute of Technology.

20.  Development and License Agreement dated February 4, 1992, between Enzytech,
     Inc. and Schering Corporation, as amended by an Amendment to Development
     and License Agreement dated July 26, 1995 between Alkermes Controlled
     Therapeutics, Inc. and Schering Corporation.

21.  Prepaid Royalty Agreement dated July 26, 1995 between Alkermes Controlled
     Therapeutics, Inc. and Schering Corporation.

22.  Collaborative Development Agreement dated as of January 9, 1995 between
     Alkermes Controlled Therapeutics, Inc. and Genentech, Inc.

23.  Note Purchase Agreement, dated as of January 9, 1995, by and between
     Alkermes, Inc. and Genentech, Inc.

24.  License Agreement, dated as of November 13, 1996 by and between Genentech,
     Inc. and Alkermes Controlled Therapeutics, Inc.

25.  Convertible Promissory Note of Alkermes, Inc. dated January 31, 1995.

26.  Development Agreement, dated as of December 23, 1993, between Medisorb
     Technologies International L.P. and Janssen Pharmaceutica International, as
     amended by the First Amendment to Development Agreement, dated as of
     December 23, 1993.


<PAGE>   23

27.  License Agreement, dated as of February 13, 1996, between Medisorb
     Technologies International L.P. and Janssen Pharmaceutica International
     (United States).

28.  License Agreement, dated as of February 21, 1996, between Medisorb
     Technologies International L.P. and Janssen Pharmaceutica International
     (worldwide except United States).

29.  Development Agreement, dated as of August 1, 1996, by and between The R.W.
     Johnson Pharmaceutical Research Institute, Alkermes, Inc. and Alkermes
     Controlled Therapeutics, Inc.

30.  Supply and License Agreement, dated as of August 1, 1996, by and between
     The R.W. Johnson Pharmaceutical Research Institute, Alkermes, Inc. and
     Alkermes Controlled Therapeutics.

31.  Letter Agreement, dated September 27, 1996, between Fleet National Bank and
     Alkermes, Inc.

32.  Promissory Note of Alkermes, Inc., dated December 23, 1994, to Fleet Bank
     of Massachusetts, N.A., as amended by Allonge to Promissory Note, dated as
     of September 27, 1996, executed by Fleet National Bank, Alkermes Controlled
     Therapeutics, Inc. and Alkermes.

33.  Promissory Note of Alkermes, Inc., dated December 19, 1995, to Fleet Bank
     of Massachusetts, N.A., as amended by Allonge to Promissory Note, dated as
     of September 27, 1996, executed by Fleet National Bank, Alkermes Controlled
     Therapeutics, Inc. and Alkermes.

34.  Loan Agreement dated December 30, 1993, among The Daiwa Bank, Limited,
     Alkermes Investments, Inc. and Alkermes, Inc., as amended by Amendment No.
     1 to Loan Agreement, dated as of December 31, 1994, and as further amended
     by Amendment to Loan Agreement, dated as of December 29, 1995, and as
     further amended by Omnibus Amendment to Loan Documents, dated as of July
     26, 1996, among The Sumitomo Bank, Limited (as assignee of The Daiwa Bank,
     Limited), Alkermes, Inc. and Alkermes Investments, Inc.

35.  Second Amended and Restated Note, dated July 26, 1996, by Alkermes, Inc.
     and Alkermes Investments, Inc. to The Sumitomo Bank, Limited.

36.  Employment Agreement, entered into as of February 7, 1991, between Richard
     F. Pops and Alkermes, Inc.

<PAGE>   24

37.  Employment Agreement, entered into as of June 13, 1994, by and between
     Robert A. Breyer and Alkermes, Inc.



<PAGE>   25

                                    Item 4.2
                                    --------


                                 Existing Liens


Liens with respect to the Collateral, (as such term is defined in the Security
Agreement, dated as of September 27, 1996, by and among Alkermes, Inc., Alkermes
Controlled Therapeutics, Inc., Alkermes Controlled Therapeutics Inc. II and the
Bank), granted by Alkermes, Inc., Alkermes Controlled Therapeutics, Inc. and
Alkermes Controlled Therapeutics Inc. II in favor of the Bank, which Liens were
created by the Security Agreement.

Pursuant to a Loan Agreement, dated December 30, 1993, as amended by the
Amendment No. 1 to Loan Agreement, dated December 31, 1994, the Amendment to
Loan Agreement, dated as of December 29, 1995, and the Omnibus Amendment to Loan
Documents, dated as of July 26, 1996, among The Sumitomo Bank, Limited
("Sumitomo"), as assignee of The Daiwa Bank, Limited, Alkermes Investments, Inc.
and Alkermes, Inc., Alkermes, Inc. has established for the benefit and on behalf
of Sumitomo Bank of New York Trust Company a restricted custodial account (the
"Restricted Account"). Pursuant to such Loan Agreement, as amended, and certain
other agreements executed in connection therewith, upon the occurrence of
certain specified events, Sumitomo has the right to require Morgan Stanley & Co.
to deliver certain funds of Alkermes, Inc. for which Morgan Stanley serves as
custodian to Sumitomo Bank of New York Trust Company for deposit into the
Restricted Account. Alkermes, Inc. has granted Sumitomo a security interest in
all of its right, title and interest in the Restricted Account and all deposits
or investments held therein.


<PAGE>   1
                                                                   Exhibit 10.35


                                 PROMISSORY NOTE
                                 ---------------


$2,500,000.00                                              Boston, Massachusetts
                                                                    June 2, 1997


     FOR VALUE RECEIVED, the undersigned Alkermes, Inc., a Pennsylvania
corporation ("Alkermes"), Alkermes Controlled Therapeutics, Inc., a Pennsylvania
corporation ("ACT I") and Alkermes Controlled Therapeutics Inc. II, a
Pennsylvania corporation ("ACT II") (Alkermes, ACT I and ACT II being referred
to herein individually as a "Borrower" and collectively as the "Borrowers")
hereby jointly and severally promise to pay to the order of FLEET NATIONAL BANK
(the "Bank") the principal amount of Two Million Five Hundred Thousand and
00/100 ($2,500,000.00) Dollars or such portion thereof as may be advanced under
Section 2 of the below-described Loan Supplement and Modification Agreement
("Principal"), with interest, at the rate hereinafter set forth, on the daily
balance of all unpaid Principal, from the date hereof until payment in full of
all Principal and interest hereunder. As used herein, (i) "Loan Supplement and
Modification Agreement" means that certain Loan Supplement and Modification
Agreement of even date herewith among the Borrowers and the Bank and (ii)
"Letter Agreement" means that certain letter agreement dated September 27, 1996
among the Borrowers and the Bank, as amended.

     Interest on all unpaid Principal shall be due and payable monthly in
arrears, on the first business day of each month commencing on the first such
date after the date of this note and continuing on the first business day of
each month thereafter and on the date of payment of this note in full, at the
rate of 8.58% per annum (computed on the basis of a year of three hundred sixty
(360) days for the actual number of days elapsed). Overdue Principal shall bear
interest at a rate per annum which at all times shall be equal to the sum of (i)
two (2%) percent per annum plus (ii) the per annum rate otherwise payable under
this note (but in no event in excess of the maximum rate permitted by then
applicable law), compounded monthly and payable on demand. If the entire amount
of any required Principal and/or interest is not paid within ten (10) days after
the same is due, the Borrowers shall pay (and shall be jointly and severally
obligated to pay) to the Bank a late fee equal to five percent (5%) of the
required payment.

     The Principal of this note represents the 1997 Term Loan (as defined in the
Loan Supplement and Modification Agreement) made pursuant to Section 2 of the
Loan Supplement and Modification Agreement. The Principal of this note shall be
repaid by the Borrowers in fifty-nine (59) equal consecutive monthly
installments (each in the amount of $41,666.67), commencing on July 1, 1997 and
continuing on the first business day of each month thereafter through and
including May 1, 2002, plus a sixtieth (60th) and final payment due on June 3,
2002 in an amount equal to all then unpaid Principal and all interest accrued
but unpaid thereon. The Borrowers may at any time and from time to time prepay
all or any portion of Principal;

<PAGE>   2

provided that each such prepayment of Principal shall be accompanied by (i)
payment of all interest under this note accrued but unpaid to the date of
prepayment and (ii) the "Make-Whole Amount", if any, required by the provisions
of Section 1.6 of the Letter Agreement. Any partial prepayment of Principal
shall be applied against Principal installments (including the final installment
of Principal) thereafter coming due, in inverse order of normal maturity.

     Payments of both Principal and interest shall be made, in immediately
available funds, at the office of the Bank located at 75 State Street, Boston,
Massachusetts 02109, or at such other address as the Bank may from time to time
designate.

     Each of the undersigned Borrowers irrevocably authorizes the Bank to make
or cause to be made, on a schedule attached to this note or on the books of the
Bank, at or following the time of receiving any payment of Principal, an
appropriate notation reflecting such transaction and the then aggregate unpaid
balance of Principal. Failure of the Bank to make any such notation shall not,
however, affect any obligation of any Borrower hereunder or under the Letter
Agreement. The Principal balance of this note, as recorded by the Bank from time
to time on such schedule or on such books, shall constitute presumptive evidence
of the unpaid principal amount of the 1997 Term Loan.

     Each Borrower hereby (a) waives notice of and consents to any and all
advances, settlements, compromises, favors and indulgences (including, without
limitation, any extension or postponement of the time for payment), any and all
receipts, substitutions, additions, exchanges and releases of collateral, and
any and all additions, substitutions and releases of any person primarily or
secondarily liable, (b) waives presentment, demand, notice, protest and all
other demands and notices generally in connection with the delivery, acceptance,
performance, default or enforcement of or under this note, and (c) agrees to
pay, to the extent permitted by law, all reasonable costs and expenses,
including, without limitation, reasonable attorneys' fees, incurred or paid by
the Bank in enforcing this note and any collateral or security therefor, all
whether or not litigation is commenced.

     This note is secured, INTER ALIA, by a Security Agreement dated as of
September 27, 1996, as amended (as so amended, the "Security Agreement") given
by the Borrowers to the Bank. This note is the "1997 Term Note" referred to in
the Loan Supplement and Modification Agreement and constitutes an "Additional
Term Note" as defined in the Letter Agreement and the Security Agreement and is
entitled to benefits thereof. This note is subject to prepayment under the
conditions set forth in the Letter Agreement, with the Make-Whole Amount, if
any, required by the Letter Agreement consequent upon such prepayment. The
maturity of this note may be accelerated upon the occurrence of an Event of
Default, as provided in the Letter Agreement. This note is the joint and several
obligation of the Borrowers.


                                        2


<PAGE>   3

     Executed, as an instrument under seal, as of the day and year first above
written.

CORPORATE SEAL                           ALKERMES, INC.

ATTEST:
                                         By: /s/ Michael J. Landine
                                             -----------------------------------
/s/ Patricia L. Allen                         Name:   Michael J. Landine
- ------------------------------                Title:  Senior Vice President
Assistant Secretary                                   and CFO



CORPORATE SEAL                           ALKERMES CONTROLLED
                                              THERAPEUTICS, INC.
ATTEST:
                                         By: /s/ Michael J. Landine
                                             -----------------------------------
/s/ Patricia L. Allen                         Name:   Michael J. Landine
- ------------------------------                Title:  Senior Vice President
Assistant Secretary                                   and CFO



CORPORATE SEAL                           ALKERMES CONTROLLED
                                              THERAPEUTICS INC. II

ATTEST:
                                         By: /s/ Michael J. Landine
                                             -----------------------------------
/s/ Patricia L. Allen                         Name:   Michael J. Landine
- ------------------------------                Title:  Senior Vice President
Assistant Secretary                                   and CFO


                                        3



<PAGE>   1
                                   EXHIBIT 11



                STATEMENT REGARDING COMPUTATION OF PER SHARE LOSS





<TABLE>
<CAPTION>
                                                       Year                 Year                 Year
                                                       Ended                Ended                Ended
                                                  March 31, 1997       March 31, 1996       March 31, 1995
                                                  --------------       --------------       --------------
<S>                                               <C>                  <C>                  <C>          
Net loss                                           $(18,797,818)        $(13,747,084)        $(11,904,153)
                                                   ============         ============         ============

Calculation of shares outstanding:

     Weighted average common shares
        outstanding used in calculating net
        loss per share in accordance with
        generally accepted accounting
        principles                                   18,288,334           14,774,584           13,535,339
                                                   ------------         ------------         ------------


        Total                                        18,288,334           14,774,584           13,535,339
                                                   ============         ============         ============

Net loss per share                                       $(1.03)              $(0.93)              $(0.88)
                                                         ======               ======               ======
</TABLE>

<PAGE>   1
                                                                      Exhibit 21






                         SUBSIDIARIES OF ALKERMES, INC.


                                                                  State or
                                               Percentage         Country of
Company                                        Ownership          Incorporation
- -------                                        ---------          -------------

Alkermes Controlled Therapeutics, Inc.            100             Pennsylvania


Alkermes Controlled Therapeutics Inc. II          100             Pennsylvania


Alkermes Development Corporation II               100             Delaware


Alkermes Europe, Ltd.                             100             United Kingdom


Alkermes Investments, Inc.                        100             Delaware

<PAGE>   1
 
                            SCHEDULE 14A INFORMATION
 
          PROXY STATEMENT PURSUANT TO SECTION 14(a) OF THE SECURITIES
                  EXCHANGE ACT OF 1934 (AMENDMENT NO.       )
 
FILED BY THE REGISTRANT /X/       FILED BY A PARTY OTHER THAN THE REGISTRANT / /
 
- --------------------------------------------------------------------------------
 
Check the appropriate box:
/ / Preliminary Proxy Statement
/X/ Definitive Proxy Statement
/ / Definitive Additional Materials
/ / Soliciting Material Pursuant to sec.240.14a-11(c) or sec.240.14a-12
/ / Confidential, for Use of the Commission Only (as permitted by Rule
    14a-6(e)(2))
 
                                 ALKERMES, INC.
                (Name of Registrant as Specified In Its Charter)
 
   (Name of Person(s) Filing Proxy Statement, if other than the Registrant)
 
PAYMENT OF FILING FEE (CHECK THE APPROPRIATE BOX):
/X/ No fee required.
/ / Fee computed on table below per Exchange Act Rules 14a-6(i)(1) and 0-11.
 
    1) Title of each class of securities to which transaction applies:
 
    2) Aggregate number of securities to which transaction applies:
 
    3) Per unit price or other underlying value of transaction computed pursuant
       to Exchange Act Rule 0-11 (Set forth the amount on which the filing fee 
       is calculated and state how it was determined):
 
    4) Proposed maximum aggregate value of transaction:
 
    5) Total fee paid:
 
/ / Fee paid previously with preliminary materials.
 
/ / Check box if any part of the fee is offset as provided by Exchange Act Rule
    0-11(a)(2) and identify the filing for which the offsetting fee was paid
    previously. Identify the previous filing by registration statement number,
    or the Form or Schedule and the date of its filing.
 
    1) Amount Previously Paid:
 
    2) Form, Schedule or Registration Statement No.:
 
    3) Filing Party:
 
    4) Date Filed:
 
- --------------------------------------------------------------------------------
<PAGE>   2

                                 ALKERMES, INC.

                         CAMBRIDGE, MASSACHUSETTS 02139

                              --------------------

                    NOTICE OF ANNUAL MEETING OF SHAREHOLDERS

                            TO BE HELD JULY 25, 1997

                              --------------------



TO THE SHAREHOLDERS:

     The annual meeting of shareholders of Alkermes, Inc. (the "Company") will
be held at the offices of the Company, 64 Sidney Street, Cambridge,
Massachusetts 02139, on Friday, July 25, 1997, at 10:00 A.M. for the following
purposes:

     1. To elect eight members of the Board of Directors, each to serve until
the next annual meeting of shareholders and until his successor is duly elected
and qualified.

     2. To approve the amendment to the Alkermes Amended and Restated 1990
Omnibus Stock Option Plan to increase to 2,500,000 the number of shares issuable
upon the exercise of options granted thereunder, an increase of 750,000 shares.

     3. To transact such other business as may properly come before the meeting.

     The Board of Directors has fixed June 6, 1997 as the record date for
determining the holders of Common Stock entitled to notice of and to vote at the
meeting. Consequently, only holders of Common Stock of record on the transfer
books of the Company at the close of business on June 6, 1997 will be entitled
to notice of and to vote at the meeting.

     Please complete, date and sign the enclosed proxy and return it promptly.
If you attend the meeting, you may vote in person.


                                    Morris Cheston, Jr.
                                    Secretary

June 27, 1997

<PAGE>   3


                                 ALKERMES, INC.

                                 PROXY STATEMENT

                                  INTRODUCTION


     The accompanying proxy is solicited by the Board of Directors of Alkermes,
Inc. ("Alkermes" or the "Company") in connection with its 1997 annual meeting of
shareholders to be held at the offices of the Company, 64 Sidney Street,
Cambridge, Massachusetts 02139, at 10:00 a.m., on July 25, 1997 (the "Meeting").
Copies of this Proxy Statement and the accompanying proxy are being mailed on or
after June 27, 1997 to the holders of record of Common Stock on June 6, 1997
(the "Record Date"). The proxy may be revoked by a shareholder at any time prior
to its use by giving notice of such revocation to the Secretary of the Company,
by appearing at the Meeting and voting in person or by returning a later dated
proxy. The expense of this solicitation will be paid by the Company. Some of the
officers and regular employees of the Company may solicit proxies personally and
by telephone.

     Unless specific instructions are given to the contrary, the persons named
in the accompanying proxy will vote FOR the election to the Company's Board of
Directors of the nominees named herein and FOR approval of the amendment to
increase the number of shares available under the 1990 Amended and Restated
Omnibus Stock Option Plan. With respect to all other matters, the persons named
in the accompanying proxy will vote as stated herein. See "Other Business."

     Holders of Common Stock of record at the close of business on the Record
Date will be entitled to cast one vote per share so held of record on such date
on all items of business properly presented at the Meeting, except that the
holders have cumulative voting rights in the election of directors. Therefore,
each shareholder is entitled to cast as many votes in the election of directors
as shall be equal to the number of shares of Common Stock held by such
shareholder on the Record Date, multiplied by the number of directors to be
elected. A shareholder may cast all such votes for a single nominee or may
distribute votes among nominees as the shareholder sees fit.

     The Company had 20,765,518 shares of Common Stock outstanding on the Record
Date. The presence at the Meeting, in person or by proxy, of shareholders
entitled to cast at least a majority of the votes that all shareholders are
entitled to cast on a particular matter will constitute a quorum for the
purposes of consideration and action on such matter.


                              ELECTION OF DIRECTORS


     Eight directors are to be elected at the Meeting to serve one-year terms
until the 1998 annual meeting of shareholders and until their respective
successors are elected and shall qualify. The persons named in the accompanying
proxy intend to vote for the election of Floyd E. Bloom, Robert A. Breyer, John
K. Clarke, Robert S. Langer, Richard F. Pops, Alexander Rich, Paul Schimmel and
Michael A. Wall, unless authority to vote for one or more of such nominees is
specifically withheld in the proxy. All of the nominees are currently directors
of the Company. The persons named in the proxy will have the right to vote
cumulatively and to distribute their votes among such nominees as they consider


<PAGE>   4

advisable. The Board of Directors is informed that all the nominees are willing
to serve as directors, but if any of them should decline to serve or become
unavailable for election at the Meeting, an event which the Board of Directors
does not anticipate, the persons named in the proxy will vote for such nominee
or nominees as may be designated by the Board of Directors, unless the Board of
Directors reduces the number of directors accordingly.

     The eight nominees for director receiving the highest number of votes cast
by shareholders entitled to vote thereon will be elected to serve on the Board
of Directors. Votes that are withheld will be counted in determining the
presence of a quorum, but will have no effect on the vote.

     Set forth below is information regarding the nominees, as of June 6, 1997,
including their recent employment, positions with the Company, other
directorships and age.

     Dr. Bloom, age 60, is a founder of Alkermes and has been a director of
Alkermes since 1987. Dr. Bloom has been active in neuropharmacology for more
than 30 years, holding positions at Yale University, the National Institute of
Mental Health and The Salk Institute. Since 1983, he has been at The Scripps
Research Institute where he is currently Chairman, Department of
Neuropharmacology. Dr. Bloom serves as Editor in Chief of Science. He holds an
A.B. (Phi Beta Kappa) from Southern Methodist University and an M.D. (Alpha
Omega Alpha) from Washington University School of Medicine in St. Louis. He is
a member of the National Academy of Science, the Institute of Medicine and the
Royal Swedish Academy of Science.

     Mr. Breyer, age 53, has been a director and President and Chief Operating
Officer of Alkermes since July 1994. From August 1991 to December 1993, Mr.
Breyer was President and General Manager of Eli Lilly Italy, a subsidiary of Eli
Lilly & Co. From September 1987 to August 1991, he was Senior Vice President,
Marketing and Sales of IVAC Corporation, a medical device company and a
subsidiary of Eli Lilly & Co.

     Mr. Clarke, age 43, has served as a director of Alkermes since 1987. He is
a general partner of DSV Partners III and DSV Management, the general partner of
DSV Partners IV. DSV Partners III and DSV Partners IV are venture capital
investment partnerships. He is also the managing general partner of Cardinal
Health Partners. Mr. Clarke has been associated with DSV since 1982. Mr. Clarke
is also a director of DNX Corporation, Inc., a biopharmaceutical company,
Chrysalis International Corporation and Cubist Pharmaceuticals, Inc.

     Professor Langer, age 48, has served as a director of the Company since
1993. He is the Kenneth J. Germeshausen Professor of Chemical and Biomedical
Engineering at the Massachusetts Institute of Technology and has been a member
of the Massachusetts Institute of Technology faculty since July 1977. In 1989,
Professor Langer was elected to the Institute of Medicine of the National
Academy of Sciences and in 1992 was elected to both the National Academy of
Engineering and the National Academy of Sciences. Professor Langer received his
bachelor's degree from Cornell University in 1970 and a Ph.D. from Massachusetts
Institute of Technology in 1974, both in chemical engineering.

     Mr. Pops, age 35, has been a director and the Chief Executive Officer of
Alkermes since February 1991. From February 1991 to June 1994, Mr. Pops was also
President of Alkermes. Mr. Pops currently serves on the Board of Directors of
Immulogic Pharmaceutical Corporation, the Biotechnology Industry Organization
(BIO), and The Brain Tumor Society (a non-profit organization).


                                        2

<PAGE>   5

     Dr. Rich, age 72, is a founder of Alkermes and has been a director of
Alkermes since 1987. Dr. Rich has been a professor at the Massachusetts
Institute of Technology since 1958, and is the William Thompson Sedgwick
Professor of Biophysics and Biochemistry. Dr. Rich earned both an A.B. (magna
cum laude) and an M.D. (cum laude) from Harvard University. Dr. Rich is
Co-Chairman of the Board of Directors of Repligen Corporation, a
biopharmaceutical company.

     Dr. Schimmel, age 56, is a founder of Alkermes and has been a director of
Alkermes since 1987. Dr. Schimmel is the John D. and Catherine T. MacArthur
Professor of Biophysics and Biochemistry at the Massachusetts Institute of
Technology, where he has been employed since 1967. A member of the National
Academy of Sciences and the American Academy of Arts and Sciences, Dr. Schimmel
graduated from Ohio Wesleyan University and completed his doctorate at Cornell
University and the Massachusetts Institute of Technology, and did post doctoral
work at Stanford University. Dr. Schimmel is Co-Chairman of the Board of
Directors of Repligen Corporation and is a director of Cubist Pharmaceuticals,
Inc.

     Mr. Wall, age 68, is a founder of Alkermes and has been Chairman of the
Board of Alkermes since 1987. From April 1992 until June 30, 1993, he was a
director and Chairman of the Executive Committee of Centocor, Inc. ("Centocor"),
a biopharmaceutical company. From November 1987 to June 30, 1993, he was
Chairman Emeritus of Centocor. Mr. Wall is a director of Kopin Corporation, a
manufacturer of high definition imaging products, and Sugen, Inc., a
biopharmaceutical company.

     The Board of Directors held seven meetings during the last fiscal year.
Each of the Company's directors attended at least 75% of the aggregate of all
meetings of the Board and of all committees of which he was a member held during
the year. The standing committees of the Board are the Audit Committee and the
Compensation Committee. The Board does not have a standing nominating committee.
The Audit Committee, consisting of John K. Clarke and Alexander Rich, met twice
during the last fiscal year. The Audit Committee is responsible for determining
the adequacy of the Company's internal accounting and financial controls. The
Compensation Committee, consisting of John K. Clarke, Robert S. Langer, Paul
Schimmel and Michael A. Wall, met once during the last fiscal year. The
Compensation Committee is responsible for reviewing matters pertaining to the
compensation of employees of, and consultants to, the Company, fixing the
compensation of officers of the Company and administering, and making grants and
awards under, the Company's stock option and restricted stock award plans. The
Compensation Sub-Committee, formed in June 1997, is responsible for making
grants and awards under the Company's stock option and restricted stock award
plans to "officers" as defined under Section 16(a) of the Securities Exchange
Act of 1934, as amended (the "Exchange Act"). The Compensation Sub-Committee,
consisting of John K. Clarke and Paul Schimmel, ratified all actions taken by
the Compensation Committee with regard to such officers since November 1996 and
did not meet during the last fiscal year.


                                        3

<PAGE>   6

                  APPROVAL OF AMENDMENT TO AMENDED AND RESTATED
                         1990 OMNIBUS STOCK OPTION PLAN

     The Company's Amended and Restated 1990 Omnibus Stock Option Plan (the
"Omnibus Plan") currently authorizes the issuance of options to purchase up to
1,750,000 shares of Common Stock. In June 1997, the Board amended the Omnibus
Plan, subject to shareholder approval, to increase the aggregate number of
shares authorized for issuance upon exercise of options granted under the
Omnibus Plan to 2,500,000. This amendment was designed to enhance the
flexibility of the Compensation Committee and the Compensation Sub-Committee of
the Board in granting stock options and limited stock appreciation rights to the
Company's employees, officers and consultants and to ensure that the Company can
continue to grant stock options to such persons at levels determined to be
appropriate by the Compensation Committee and the Compensation Sub-Committee.

     The affirmative vote of a majority of the votes cast by all shareholders
entitled to vote will be required to approve the proposed amendment to the
Omnibus Plan. Abstentions will be counted as present for purposes of determining
the presence of a quorum for purposes of this proposal, but will not be counted
as votes cast. Broker non-votes (shares held by a broker or nominee as to which
the broker or nominee does not have the authority to vote on a particular
matter) will not be counted as present for purposes of determining the presence
of a quorum for purposes of this proposal and will not be voted. Accordingly,
neither abstentions nor broker non-votes will have any effect on the outcome of
the vote on this proposal.

     The Board of Directors recommends that you vote FOR the approval of the
amendment to the Omnibus Plan.

DESCRIPTION OF THE OMNIBUS PLAN

     The Omnibus Plan provides for the grant to employees, officers and
directors of, and consultants to, the Company and its subsidiaries of options to
purchase up to 1,750,000 shares of Common Stock. The proposed amendment, which
has been adopted by the Board of Directors, increases the number of shares which
may be issued upon exercise of options which may be granted under the Omnibus
Plan to 2,500,000. Such options may either be "incentive stock options" as
defined in Section 422A of the Internal Revenue Code of 1986, as amended (the
"Code"), or may be non-qualified options. The Omnibus Plan will terminate on
September 19, 2000 unless sooner terminated by the Board of Directors. The
Company estimates that there are currently 200 persons who are eligible to
receive options under the Omnibus Plan.

     The Omnibus Plan is administered by the Board of Directors with respect to
options granted to employees, officers and consultants who are not directors,
executive officers or significant employees of the Company, unless the Board
delegates administration of the Omnibus Plan to the Compensation Committee,
which the Board has done. The Compensation Sub-Committee administers the Omnibus
Plan with respect to options granted to directors, executive officers and
significant employees of the Company ("Reporting Persons"). The total number of
options to be granted in any year under the Omnibus Plan to participants, the
number and selection of the participants to receive options, the type and number
of options granted to each and the other terms and provisions of such options
are wholly within the discretion of the Compensation Committee and the
Compensation Sub-Committee, subject to the limitations set forth in the Omnibus
Plan.


                                        4

<PAGE>   7


     Under the terms of the Omnibus Plan, the option exercise price may not be
less than 100% (or, with respect to incentive stock options, 110% if the
optionee owns 10% of the total combined voting power of all classes of stock of
the Company) of the fair market value of the underlying stock at the time the
option is granted. Options granted under the Omnibus Plan are generally
nontransferable and expire upon the earlier of an expiration date fixed by the
Compensation Committee and set forth in each individual option award
certificate, ten years (or with respect to incentive stock options, five years,
if the optionee owns 10% of the total combined voting power of all classes of
stock of the Company) from the date of grant, and either three months after the
date the optionee ceases to be an employee, officer or director of, or
consultant to, the Company or its subsidiaries or, if the optionee dies or
becomes disabled, one year after the date of death or the date the optionee
ceases to be an employee, officer, director or consultant because of disability.
Options which have expired or which have been cancelled unexercised will be
returned to the Omnibus Plan and may again be granted pursuant to the Omnibus
Plan.

     Under the Omnibus Plan, the price payable upon exercise of options may be
paid in cash, property, services rendered or, under certain circumstances, in
shares of stock of the Company having a fair market value equal to the option
price on the date of exercise or any combination thereof.

     The Compensation Committee and the Compensation Sub-Committee are
authorized, under the Omnibus Plan, to grant limited stock appreciation rights
("LSARs") with respect to all or any portion of the shares covered by options
granted to Reporting Persons simultaneously with the grant of the related
options if the related options are incentive stock options, or simultaneously
with the grant of, or at any time during the term of, the related options if the
related options are non-qualified options. The grant of an LSAR will not be
effective until six months after the date of its grant. Those options with
respect to which LSARs have been granted and become effective shall become
immediately exercisable upon the occurrence of any of the following events
(each, a "Triggering Event"): (i) consummation by the Company of a
reorganization, merger, or consolidation after approval of any such transaction
by shareholders, other than Reporting Persons, holding at least the minimum
number of shares necessary to approve such transaction under the Company's
Amended and Restated Articles of Incorporation, as amended (the "Articles") and
applicable law, (ii) consummation by the Company of a sale of substantially all
its assets after approval of any such transaction by shareholders, other than
Reporting Persons, holding at least the minimum number of shares necessary to
approve such transaction under the Articles and applicable law, or (iii)
acquisition by a single purchaser or group of related purchasers of in excess of
51% of the issued and outstanding shares of Common Stock from shareholders of
the Company other than Reporting Persons, in any case other than in a
transaction in which the surviving corporation or the purchaser is the Company
or a subsidiary of the Company (unless in such transaction the capital stock of
the Company or a subsidiary of the Company is converted into capital stock of an
entity other than the Company or any such subsidiary) or an entity controlled by
a Reporting Person.

     Each LSAR provides that upon the occurrence of a Triggering Event, the
optionee will receive an amount in cash equal to the amount by which the fair
market value per share of the Common Stock issuable upon exercise of the option
on the date such Triggering Event occurs exceeds the exercise price per share of
the option to which the LSAR relates. A Triggering Event shall be deemed to have
occurred only when the fair market value of the shares subject to the underlying
option exceeds the exercise price of such option. When a Triggering Event
occurs, the related option will cease to be exercisable. LSARs have been granted
with respect to options to purchase 295,000 shares granted under the Omnibus
Plan to Mr. Pops, options to purchase 74,500 shares granted to Mr. Landine and
options to purchase 56,250 shares granted to Dr. Bartus.


                                        5
<PAGE>   8

OPTIONS OUTSTANDING, EXERCISABLE AND AVAILABLE FOR FUTURE GRANT

     As of June 6, 1997, options to purchase 1,466,228 shares were outstanding
under the Omnibus Plan, of which options to purchase 669,785 shares were
exercisable. The exercise prices for the outstanding options ranged from $0.56
to $28.75 per share. On June 6, 1997, the last sale price of the Company's
Common Stock on the Nasdaq National Market was $17.125 per share. At June 6,
1997, options to purchase 62,699 shares (plus any options that expire or are
cancelled in the future) were available for future grant, exclusive of the
additional shares covered by the proposed amendment.

FEDERAL INCOME TAX CONSEQUENCES

     The Federal income tax discussion set forth below is intended for general
information only. State and local income tax consequences are not discussed and
may vary from locality to locality.

     Under present Treasury regulations, a participant who is granted a
non-qualified option will not realize taxable income at the time the option is
granted. In general, a participant will be subject to tax for the year of
exercise on an amount of ordinary income equal to the excess of the fair market
value of the shares on the date of exercise over the option price, and the
Company will receive a corresponding deduction. The participant's basis in the
shares so acquired will be equal to the option price plus the amount of ordinary
income upon which he is taxed. Upon subsequent disposition of the shares, the
participant will realize capital gain or loss, long-term or short-term,
depending upon the length of time the shares are held after the option is
exercised.

     A participant is not taxed at the time an incentive option is granted. The
tax consequences upon exercise and later disposition depend upon whether the
participant was an employee of the Company or a subsidiary at all times from the
date of grant until three months preceding exercise (one year in the case of
permanent and total disability) and on whether the participant holds the shares
for more than one year after exercising the option and two years after the date
of grant of the option.

     If the participant satisfies both the employment rule and the holding rule,
for regular tax purposes the participant will not realize income upon exercise
of the option and the Company will not be allowed an income tax deduction at any
time. The difference between the option price and the amount realized upon
disposition of the shares by the participant will generally constitute a
long-term capital gain or a long-term capital loss, as the case may be.

         If the participant meets the employment rule but fails to observe the
holding rule (a "disqualifying disposition"), the participant generally
recognizes as ordinary income, in the year of the disqualifying disposition
(whether by sale or gift), the excess of the fair market value of the shares at
the date of exercise over the option price. In the case of a sale, any excess of
the sales price over the fair market value at the date of exercise will be
recognized by the participant as capital gain (long-term or short-term depending
on the length of time the stock was held after the option was exercised). If,
however, the sales price is less than the fair market value at the date of
exercise, then the ordinary income recognized by the participant is limited to
the excess of the sales price over the option price. In the case of any
disqualifying disposition, the Company's tax deduction is limited to the amount
of ordinary income recognized by the participant.

     Different consequences will apply for a participant subject to the
alternative minimum tax.


                                        6

<PAGE>   9

                  EXECUTIVE COMPENSATION AND OTHER INFORMATION

SUMMARY COMPENSATION TABLE

     The following table sets forth a summary of the compensation paid by the
Company during its last three fiscal years to its Chief Executive Officer and to
each of the four other most highly compensated executive officers of the Company
whose total annual salary and bonus exceeded $100,000 during the fiscal year
ended March 31, 1997 (collectively, the "Named Executive Officers").

<TABLE>

<CAPTION>
                                     ANNUAL COMPENSATION                LONG-TERM COMPENSATION
                                                                                         Securities
   Name and                                                         Restricted           Underlying
   Principal                                                           Stock              Options/             All Other
   Position                Year      Salary ($)     Bonus ($)      Awards ($)(1)          LSARs (#)        Compensation ($)
  ----------               ----      ----------     ---------      -------------         -----------       ----------------

<S>                        <C>         <C>             <C>             <C>                <C>                    <C>
Richard F. Pops            1997        291,116         50,000               0              40,000                     0
 Chief Executive           1996        266,346         15,000               0              87,500                     0
 Officer                   1995        249,423              0          35,000             127,500(2)                  0

Robert A. Breyer           1997        223,058         25,000               0              25,000                 1,500(3)
 President and Chief       1996        204,231         10,000               0              50,000                 1,500(3)
 Operating Officer         1995        143,077(4)      30,000(5)            0             207,500                16,735(6)

Raymond T. Bartus          1997        199,039          5,000               0              10,000                     0
 Senior Vice               1996        190,692              0               0              17,500                     0
 President,                1995        189,000              0          10,500              75,000(7)                  0
 Preclinical Research
 and Development

Michael J. Landine         1997        197,752         30,000               0              25,000                     0
 Senior Vice               1996        179,231              0               0              51,500                     0
 President and             1995        175,000              0          21,000              57,000(8)                  0
 Chief Financial
 Officer

Scott D. Putney            1997        177,538          5,000               0              10,000                     0
 Vice President,           1996        169,192              0               0              17,500                     0
 Protein and               1995        167,500              0          10,500              75,000                     0
 Molecular Biology
</TABLE>

- --------------
(1)  All restricted stock awards have been made pursuant to the Company's 1991
     Restricted Common Stock Award Plan (the "Award Plan"). All awards cease to
     be subject to forfeiture on an annual basis in 20% increments beginning on
     the first anniversary of the date of award, provided the grantee has
     remained an employee of the Company since the date of grant and the
     employee has not deferred the date on which forfeiture will lapse. Stock
     certificates are issued to the grantees


                                        7

<PAGE>   10






     on the date each portion of their award ceases to be subject to forfeiture.
     For purposes of the above table, the value of an award was determined by
     multiplying the total shares subject to the award by the closing price for
     the Company's Common Stock as reported on the Nasdaq National Market on the
     date of the award. To the extent the Company declares any dividends on its
     Common Stock, dividends shall be payable on awards only to the extent
     forfeiture restrictions with respect to such awards have lapsed and shares
     have been issued. The aggregate number and value (based on the closing
     price of the Company's Common Stock on the Nasdaq National Market on March
     31, 1997) of the restricted stock awards as of June 6, 1997 of each Named
     Executive Officer who has awards are as follows: Mr. Pops, 16,000 shares,
     $224,000; Dr. Bartus, 4,200 shares, $58,800; Mr. Landine, 9,600 shares,
     $134,400; Dr. Putney, 3,600 shares, $50,400.

(2)  Includes options to purchase 120,000 shares of the Company's Common Stock
     granted, in tandem with Limited Stock Appreciation Rights ("LSARs"), in
     exchange for certain outstanding options previously granted to Mr. Pops.
     See "Ten Year Option/SAR Repricings." For a discussion of the LSARs held by
     Mr. Pops, see "Employment Contracts and Termination of Employment and
     Change-in-Control Arrangements."

(3)  Consists of payment to Mr. Breyer for opting out of the Company's health
     insurance plan.

(4)  Represents cash compensation paid to Mr. Breyer for 39 weeks of employment
     in the fiscal year ended March 31, 1995.

(5)  Consists of a signing bonus paid to Mr. Breyer upon commencement of his
     employment in July 1994.

(6)  Consists of temporary living and moving expenses reimbursed to Mr. Breyer
     in connection with his relocation to Cambridge, Massachusetts upon
     commencement of his employment and a $1,154 payment to Mr. Breyer for
     opting out of the Company's health insurance plan.

(7)  Includes options to purchase 67,500 shares of the Company's Common Stock
     granted in exchange for all outstanding options previously granted to Dr.
     Bartus. See "Ten Year Option/SAR Repricings." Of such options, options to
     purchase 56,250 shares were granted in tandem with LSARs. For a discussion
     of the LSARs held by Dr. Bartus, see "Employment Contracts and Termination
     of Employment and Change in Control Arrangements."

(8)  Includes options to purchase 49,500 shares of the Company's Common Stock
     granted, in tandem with LSARs, in exchange for certain outstanding options
     previously granted to Mr. Landine. See "Ten Year Option/SAR Repricings."
     For a discussion of the LSARs held by Mr. Landine, see "Employment
     Contracts and Termination of Employment and Change-in-Control
     Arrangements."


                                        8

<PAGE>   11

OPTIONS/LSAR GRANTS IN LAST FISCAL YEAR

     The following table sets forth information concerning stock options and
LSARs granted during the fiscal year ended March 31, 1997 to each of the Named
Executive Officers.

<TABLE>
<CAPTION>
                                                                                             Potential Realizable
                       Shares            % of Total                                            Value at Assumed
                     Underlying         Options/LSARs                                           Annual Rates of
                      Options/           Granted to          Exercise                             Stock Price
                        LSARs           Employees in          or Base       Expiration         Appreciation for
Name                 Granted (#)         Fiscal Year       Price ($/Sh)        Date              Option Term
- ----                 -----------      ----------------     ------------     ----------      ------------------------
                                                                                             5% ($)          10% ($)

<S>                     <C>                <C>               <C>              <C>            <C>             <C>    
Richard F. Pops         40,000             9.26              14.31            11/21/06       359,979         912,258


Robert A. Breyer        25,000             5.79              14.31            11/21/06       224,987         570,161


Raymond T. Bartus       10,000             2.31              14.31            11/21/06        89,995         228,065


Michael J. Landine      25,000             5.79              14.31            11/21/06       224,987         570,161


Scott D. Putney         10,000             2.31              14.31            11/21/06        89,995         228,065
</TABLE>


                                        9

<PAGE>   12

AGGREGATED OPTION/SAR EXERCISES IN LAST FISCAL YEAR AND FY-END OPTION/SAR VALUES

     The following table sets forth the number of shares acquired upon exercise
of options exercised by the Named Executive Officers during the fiscal year
ended March 31, 1997, the value realized upon exercise of such options, the
number of shares issuable on exercise of options held by such persons at the end
of the last fiscal year and the value of such unexercised options as of such
date.

<TABLE>
<CAPTION>
                                                             Number of
                                                             Securities                 Value of
                                                             Underlying               Unexercised
                                                             Unexercised              In-the-Money
                                                             Options/SAR at           Options/SAR at
                                                             FY-End (#)               FY-End ($)(1)

                    Shares Acquired          Value           Exercisable/             Exercisable/
Name                 on Exercise (#)       Realized ($)      Unexercisable            Unexercisable
- --------------------------------------------------------------------------------------------------------

<S>                       <C>               <C>           <C>                     <C>    
Richard F. Pops               0                  0        280,625  / 149,375      3,414,000  / 1,055,975

Robert A. Breyer          2,000             43,760        114,250  / 166,250      1,139,763  / 1,393,263

Raymond T. Bartus             0                  0         53,125  /  49,375        548,775  /   397,425
 
Michael J. Landine            0                  0         74,625  /  83,875        843,555  /   583,065

Scott D. Putney               0                  0         53,125  /  49,375        548,775  /   397,425
</TABLE>

- --------------------

(1)  Value is measured by the difference between the closing price for the
     Company's Common Stock on the Nasdaq National Market on March 31, 1997 and
     the exercise price of the option.


                                       10
<PAGE>   13

TEN YEAR OPTION/SAR REPRICINGS

     The following table sets forth certain information with respect to the
stock options held by the Company's current executive officers that have been
repriced since the formation of the Company in 1987.

<TABLE>
<CAPTION>
                                                                                                           Length of
                                         Number of                                                         Original
                                        Securities                                                           Term
                                        Underlying    Market Price of    Exercise Price                    Remaining
                                       Options/SARS    Stock at Time       at Time of       New            at Date of
                                       Repriced or    of Repricing or     Repricing or    Exercise        Repricing or
     Name                 Date           Amended       Amendment($)       Amendment($)     Price($)        Amendment
     ----                 ----        -------------   -------------      -------------    --------         ----------


<S>                     <C>              <C>             <C>                 <C>          <C>           <C>    
Richard F. Pops          7/21/94         50,000(1)      $  3.69              $11.375      $  3.69       7 years 125 days
Chief Executive          7/21/94         75,000(1)         3.69                 9.00         3.69       8 years 153 days
  Officer                7/21/94         35,000(1)         3.69                 7.94         3.69       9 years 182 days
                        11/25/91         50,000          11.375               15.875       11.375       9 years 324 days
                                                                            
Raymond T. Bartus        7/21/94         75,000(1)         3.69                 9.00         3.69       8 years 102 days
Senior Vice President,   7/21/94         15,000(1)         3.69                 9.00         3.69       8 years 153 days
 Preclinical Research                                                       
 and Development                                                            
                                                                            
Michael J. Landine       7/21/94         25,000(1)         3.69               11.375         3.69       7 years 125 days
Senior Vice President    7/21/94         20,000(1)         3.69                 9.00         3.69       8 years 153 days
and Chief Financial      7/21/94         21,000(1)         3.69                 7.94         3.69       9 years 182 days
  Officer               11/25/91         25,000          11.375               15.875       11.375       9 years 324 days
                                                                            
Don G. Burstyn           7/21/94         30,000(1)         3.69                7.875         3.69       9 years 151 days
Vice President,                                                             
 Regulatory Affairs                                                         
                                                                            
Scott D. Putney          7/21/94         75,000(1)         3.69                 9.56         3.69       7 years   9 days
Vice President,          7/21/94         15,000(1)         3.69                 9.00         3.69       8 years 153 days
 Protein and                                                             
 Molecular Biology
</TABLE>

- --------------------
(1)  All options indicated were exchanged for options to purchase 25% fewer
     shares.


EMPLOYMENT CONTRACTS AND TERMINATION OF EMPLOYMENT AND CHANGE-IN-CONTROL
ARRANGEMENTS

     Under an agreement between Mr. Pops and the Company, dated February 7,
1991, in the event Mr. Pops' employment with the Company is terminated for any
reason other than as a result of his taking certain actions against or that have
a significant deleterious effect on the Company, Mr. Pops shall be entitled to
receive a payment equal to two-thirds of his then current annual base salary.
Under an agreement between Mr. Breyer and the Company, dated June 13, 1994, in
the event Mr. Breyer's employment with the Company is terminated by Alkermes for
any reason other than as a result of his taking certain actions against or that
have a significant deleterious effect on the Company, Mr. Breyer

                                       11

<PAGE>   14

shall be entitled to receive payments at the monthly rate of his then current
annual base salary for up to nine months. The Company and Mr. Landine have
agreed that, in the event Mr. Landine's employment with the Company is
terminated for any reason other than as a result of his taking certain actions
against or that have a significant deleterious effect on the Company, Mr.
Landine shall be entitled to receive payments for the following six months
aggregating 50% of his then current annual salary.

     Messrs. Pops and Landine and Dr. Bartus have been granted LSARs in
connection with a portion of the stock options previously granted to them. Each
LSAR provides that after the occurrence of one of several triggering events,
including a reorganization or merger of the Company, a sale of the assets of the
Company or the acquisition by a person or group of more than 51% of the Common
Stock of the Company, the optionee will receive an amount in cash equal to the
amount by which the fair market value per share of the Company's Common Stock
issuable upon exercise of the option on the date such a triggering event occurs
exceeds the exercise price per share of the option to which the LSAR relates. A
triggering event shall be deemed to have occurred only when the fair market
value of the shares subject to the underlying option exceeds the exercise price
of such option. When a triggering event occurs, the related option will cease to
be exercisable.

COMPENSATION OF DIRECTORS

     Except for stock options automatically granted under the Stock Option Plan
For Non-Employee Directors, directors do not receive compensation for services
on the Board of Directors or any committee thereof. All of the directors,
however, are reimbursed for their expenses for each Board and committee meeting
attended. In addition, Floyd E. Bloom, Alexander Rich, Paul Schimmel and Michael
A. Wall receive consulting fees from Alkermes and Robert S. Langer receives
consulting fees from Alkermes Controlled Therapeutics, Inc. ("ACTI"), a wholly
owned subsidiary of the Company. During the fiscal year ended March 31, 1997,
Alkermes paid consulting fees to Drs. Bloom, Rich and Schimmel and Mr. Wall
aggregating $30,000, $30,000, $48,000 and $80,000, respectively, and ACTI paid
consulting fees to Professor Langer aggregating $86,572. Consulting fees are
currently being paid to each of Drs. Bloom and Rich at the rate of $2,500 per
month, to Dr. Schimmel at the rate of $4,000 per month, to Mr. Wall at the rate
of $6,667 per month and to Professor Langer at the rate of $7,214 per month.
Alkermes believes that the terms of such consulting arrangements are no less
favorable to Alkermes and ACTI than those they could have received from an
independent third party.

COMPENSATION COMMITTEE INTERLOCKS AND INSIDER PARTICIPATION

     During the last fiscal year, the Compensation Committee consisted of John
K. Clarke, Robert S. Langer, Paul Schimmel and Michael A. Wall. The Compensation
Sub-Committee consists of John K. Clarke and Paul Schimmel. Mr. Wall and Dr.
Schimmel are consultants to Alkermes and Professor Langer is a consultant to
ACTI. See "Compensation of Directors."


                                       12

<PAGE>   15

         REPORT OF THE COMPENSATION COMMITTEE ON EXECUTIVE COMPENSATION

     The Compensation Committee (the "Committee") is responsible for reviewing
and establishing the compensation, and the Compensation Sub-Committee is
responsible for reviewing and establishing compensation in the form of stock
options or restricted stock awards, of the Company's executive officers.

     EXECUTIVE COMPENSATION POLICIES

     The Company's executive compensation program is designed to attract, retain
and motivate experienced and well qualified executive officers who will promote
the Company's research and product development efforts. In establishing
executive compensation levels, the Committee is guided by a number of
considerations. Because the Company is still in the process of developing its
portfolio of product candidates, and because of the volatile nature of
biotechnology stocks, the Committee believes that traditional performance
criteria, such as revenue growth, profit margins and stock price are
inappropriate for evaluating and rewarding the efforts of the Company's
executive officers. Rather, the Committee bases executive compensation on the
achievement of certain product development, corporate partnering, financial,
strategic planning and other goals of the Company and the executive officer. In
establishing compensation levels, the Committee also evaluates each officer's
individual performance using certain subjective criteria, including an
evaluation of each officer's initiative, contribution to overall corporate
performance and managerial ability. No specific numerical weight is given to any
of the above-noted subjective or objective performance criteria. In making its
evaluations, the Committee consults on an informal basis with other members of
the Board and, with respect to officers other than the Chief Executive Officer,
reviews the recommendations of the Chief Executive Officer.

     Another consideration which affects the Committee's decisions regarding
executive compensation is the high demand for well-qualified personnel in the
biotechnology industry. Given such demand, the Committee strives to maintain
compensation levels which are competitive with the compensation of other
executives in the industry. To that end, the Committee reviews data obtained
from a generally available outside survey of compensation and benefits in the
biotechnology industry and from proxy statements or personal knowledge regarding
executive compensation at a limited number of comparable companies, some of
which are included in the Nasdaq Pharmaceutical Index shown in the Performance
Graph on page 17.

     A third factor which affects compensation levels is the Committee's belief
that stock ownership by management is beneficial in aligning management's and
shareholders' interests in the enhancement of shareholder value. In accordance
with such belief, the Committee and the Compensation Sub-Committee seek to
provide a significant portion of executive compensation in the form of stock
options or restricted stock awards. The Committee and the Compensation
Sub-Committee have not, however, targeted a range or specific number of options
or awards for each executive position, but makes its decisions based on the
above-mentioned survey and the general experience of the Committee and the
Compensation Sub-Committee members.


                                       13

<PAGE>   16

     COMPENSATION MIX

     The Company's executive compensation packages generally include three
components: base salary; a discretionary annual cash bonus; and stock options
and restricted stock awards. The Committee generally reviews, and makes any
changes to, the base salary and bonus of each executive officer as of the
beginning of each calendar year.

     Base Salary

     The Committee seeks to establish base salaries which are competitive for
each position and level of responsibility with those of executive officers at
various other biotechnology companies of comparable size and stage of
development.

     Discretionary Cash Bonus

     The Committee believes that discretionary cash bonuses are useful on a case
by case basis to motivate and reward executive officers. However, cash bonuses
have not been a significant element of the Company's executive compensation
program, as the Committee believes long-term incentives are more appropriate and
help to conserve cash. Bonuses for executive officers are not guaranteed, but
are awarded from time to time only in the discretion of the Committee. Criteria
for bonuses for executive officers range from success in attracting equity
capital to success in conducting clinical trials to success in entering into new
and expanded collaborations.

     Stock Options and Restricted Stock Awards

     Grants of stock options and awards of restricted stock under the Company's
stock option and restricted stock award plans are designed to promote the
identity of the long-term interests between the Company's executives and its
shareholders and to assist in the retention of executives. Since stock options
granted by the Company generally become exercisable over either a three-year or
four-year period and restricted stock awards made by the Company cease to be
subject to forfeiture on an annual basis over a five-year period, their ultimate
value is dependent upon the long-term appreciation of the Company's stock price
and the executive's continued employment with the Company. In addition, grants
of stock options and awards of restricted stock may result in an increase in
executive officers' equity interests in the Company, thereby providing such
persons with the opportunity to share in the future value they are responsible
for creating.

     When granting stock options or making restricted stock awards, the
Committee and the Compensation Sub-Committee consider the relative performance
and contributions of each officer compared to that of other officers within the
Company with similar levels of responsibility. The number of options granted or
shares awarded to each executive officer are generally determined by the
Committee and the Compensation Sub-Committee on the basis of the general
experience and subjective judgment of its members.


                                       14

<PAGE>   17

     Section 162(m) of the Code limits the deductibility of annual compensation
over $1 million to the Chief Executive Officer and the other Named Executive
Officers unless certain conditions are met. The Company's Chief Executive
Officer and the other Named Executive Officers have not received annual
compensation over $1 million, and the Company has not yet determined what
measures, if any, it should take to comply with Section 162.


     COMPENSATION OF THE CHIEF EXECUTIVE OFFICER

     In establishing Mr. Pops' compensation package, the Committee seeks to
maintain a level of total current compensation that is competitive with that of
chief executives of certain other companies in the biotechnology industry at
comparable stages of development. In addition, in order to align Mr. Pops'
interests with the long-term interests of the Company's shareholders, the
Committee and the Compensation Sub-Committee attempt to make a substantial
portion of the value of his total compensation dependent on the long-term
appreciation of the Company's stock price.

     At the Company's current stage of development, the Committee believes that
Mr. Pops' performance as Chief Executive Officer of the Company must be
evaluated almost exclusively using subjective criteria, including the
Committee's evaluation of the Company's progress in attracting and retaining
senior management, identifying new product candidates, identifying and securing
corporate collaborators for the development of product candidates, identifying
and acquiring new product development and technology opportunities, advancing
the Company's existing product candidates through the complex drug development
and regulatory approval process and raising the necessary capital to fund its
research and development efforts.

     In evaluating and establishing Mr. Pops' current compensation package, the
Committee considered the following accomplishments of the Company during
calendar 1996.

     In March 1996, the Company acquired certain assets and technology owned or
used by Medisorb Technologies International L.P. In May 1996, the Company
successfully completed a public offering of 2,300,000 shares of its Common Stock
resulting in net proceeds to the Company of approximately $22.9 million. In
addition, a $5 million mortgage financing loan was completed in September 1996.
The Company expanded its collaboration for Medisorb(R) with Janssen
Pharmaceutica and its collaboration for ProLease(R) with Genentech, Inc. At the
time the Committee established Mr. Pops' compensation, the Company had
substantially negotiated and subsequently entered into a new collaboration for
ProLease with Johnson & Johnson.

     In addition, the Company progressed in clinical trials of product
candidates based on its proprietary RMP-7(TM), ProLease and Medisorb drug
delivery systems. The Company completed a Phase I/II clinical trial of
intra-arterial RMP-7 and completed enrollment of one multi-center Phase II
clinical trial of intra-arterial RMP-7. In July 1996, Alkermes initiated a
non-controlled, open label Phase I/II clinical trial of intravenous RMP-7. In
August 1996, the Company completed a Phase I clinical trial of ProLease hGH in
growth hormone deficient adults and in November 1996 commenced a multi-center
Phase I/II clinical trial of ProLease hGH in growth hormone deficient children.
The Company successfully manufactured a Medisorb formulation of a Janssen
proprietary product and initial Phase I clinical trials of this Medisorb
formulation were completed in 1996.


                                       15

<PAGE>   18

     Given the significant role played by Mr. Pops in each of the above-noted
accomplishments, the Committee increased Mr. Pops' annual base salary effective
January 1, 1997 from $290,000 to $320,000 and granted Mr. Pops cash bonuses
during the fiscal year totaling $50,000. As additional recognition of Mr. Pops'
efforts in 1996, and in furtherance of the Committee's belief that a substantial
portion of Mr. Pops' total compensation should be dependent on the long-term
appreciation of the Company's stock price, in November 1996 the Committee
granted Mr. Pops options to purchase 40,000 shares of Common Stock, which was
subsequently ratified by the Compensation Sub-Committee. The Committee believes
that each of these actions was particularly appropriate given Mr. Pops'
performance during calendar 1996 and in order to maintain his compensation at a
competitive level compared to that of the chief executive officers of other
similarly sized and positioned biotechnology companies.

                               Compensation Committee

                               John K. Clarke        Paul Schimmel
                               Robert S. Langer      Michael A. Wall


                               Compensation Sub-Committee

                               John K. Clarke        Paul Schimmel


                                       16

<PAGE>   19

PERFORMANCE GRAPH

     The following graph compares the yearly percentage change in the cumulative
total shareholder return on the Company's Common Stock for the last five fiscal
years, with the cumulative total return on the Nasdaq Stock Market (U.S.) Index
and the Nasdaq Pharmaceutical Index, which includes biotechnology companies. The
comparison assumes $100 was invested on March 31, 1993 in the Company's Common
Stock and in each of the foregoing indices and further assumes reinvestment of
any dividends. The Company did not declare or pay any dividends during the
comparison period.

<TABLE>
<CAPTION>
                             3/31/93     3/31/94    3/31/95    3/31/96      3/31/97
                             -------     -------    -------    -------      -------

<S>                           <C>          <C>        <C>       <C>          <C>   
Alkermes, Inc.                100.00       87.50      34.38     114.06       175.00

Nasdaq Stock Market           100.00      107.94     120.08     163.04       181.21
(U.S. Index)

Nasdaq Pharmaceutical         100.00      100.99     100.61     177.41       162.36
Index
</TABLE>

                                       17

<PAGE>   20

                      MANAGEMENT AND PRINCIPAL SHAREHOLDERS

     The following table sets forth certain information regarding the ownership
of the Company's Common Stock as of June 6, 1997 by (i) each person who is known
by the Company to be the owner of 5% or more of the Company's outstanding shares
of Common Stock, (ii) each director of the Company, (iii) each of the Named
Executive Officers, and (iv) all the directors and executive officers of the
Company as a group.

<TABLE>
<CAPTION>
                                         Number of Shares            Percentage
                                           Beneficially            Beneficially
Names or Group                                Owned(1)                 Owned
- --------------                           ----------------          ------------

<S>                                        <C>                         <C>   
Amerindo Investment Advisors Inc.......    3,167,500(2)                15.25%
One Embarcadero, Ste. 2300
San Francisco, CA  94111

FMR Corporation........................    2,100,100(3)                10.11%
82 Devonshire Street
Boston, MA  02109

ALZA Corporation.......................    2,000,000                    9.63%
950 Page Mill Road
Palo Alto, CA  94303

Floyd E. Bloom.........................      166,000(4)                   *

Robert A. Breyer.......................      173,750(5)                   *

John K. Clarke.........................       26,968(6)                   *

Robert S. Langer.......................      171,189(7)                   *

Richard F. Pops........................      345,091(8)                 1.64%

Alexander Rich.........................      184,200(9)                   *

Paul Schimmel..........................      302,200(9)                 1.46%

Michael A. Wall........................      489,850(10)                2.36%

Raymond T. Bartus......................       84,125(11)                  *

Michael J. Landine.....................      154,775(12)                  *

Scott D. Putney........................       84,725(13)                  *



</TABLE>


                                       18

<PAGE>   21

<TABLE>
<CAPTION>
                                         Number of Shares            Percentage
                                           Beneficially            Beneficially
Names or Group                                Owned(1)                 Owned
- --------------                           ----------------          ------------

<S>                                        <C>                         <C>   

All directors and executive officers
    as a group (16 persons)............    2,275,673(14)               10.52%
</TABLE>

- --------------------
*    Represents less than 1% of the outstanding shares of the Company's Common
     Stock.

(1)  Except as indicated in footnotes to this table, the persons named in this
     table have sole voting and investment power with respect to all shares of
     Common Stock owned.

(2)  Information is as of December 31, 1996. Amerindo Investment Advisors Inc.
     holds these shares in its capacity as investment advisor for various
     fiduciary accounts.

(3)  Information is as of May 8, 1997. FMR Corporation holds 1,983,000 of these
     shares in its capacity as investment advisor for various fiduciary
     accounts.

(4)  Includes 163,500 shares of Common Stock held by the Corey-Bloom Family
     Trust. Also includes 2,500 shares of Common Stock subject to options which
     are exercisable or which will become exercisable within 60 days of June 6,
     1997.

(5)  Includes 166,750 shares of Common Stock subject to options which are
     exercisable or will become exercisable within 60 days of June 6, 1997.

(6)  Includes 850 shares of Common Stock issuable upon exercise of warrants
     which are exercisable. Also includes 12,500 shares of Common Stock subject
     to options which are exercisable.

(7)  Includes 167,857 shares of Common Stock held by The Wetmann Trust.
     Professor Langer is a beneficiary of The Wetmann Trust, but has no voting
     or investment power with respect to the shares held by The Wetmann Trust.
     Also includes 832 shares held by a trust, of which Professor Langer's wife
     is trustee, for the benefit of his children. Also includes 2,500 shares of
     Common Stock subject to options held by Professor Langer which are
     exercisable.

(8)  Includes 332,500 shares of Common Stock subject to options which are
     exercisable or which will become exercisable within 60 days of June 6,
     1997.

(9)  Includes 1,700 shares of Common Stock issuable upon exercise of warrants
     which are exercisable. Also includes 2,500 shares of Common Stock subject
     to options which are exercisable.

(10) Includes 2,500 shares of Common Stock subject to options which are
     exercisable.

(11) Includes 78,125 shares of Common Stock subject to options which are
     exercisable or which will become exercisable within 60 days of June 6,
     1997.


                                       19

<PAGE>   22

(12) Includes 99,875 shares of Common Stock subject to options which are
     exercisable or which will become exercisable within 60 days of June 6,
     1997.

(13) Includes 78,125 shares of Common Stock subject to options which are
     exercisable or which will become exercisable within 60 days of June 6,
     1997. Also includes 1,200 shares of Common Stock awarded under the Award
     Plan which will cease to be subject to forfeiture within 60 days of June 6,
     1997.

(14) Includes 874,625 shares of Common Stock subject to options or issuable upon
     exercise of warrants which are exercisable or which will become exercisable
     within 60 days of June 6, 1997. Also includes 1,800 shares of Common Stock
     awarded under the Award Plan which will cease to be subject to forfeiture
     within 60 days of June 6, 1997. Also includes 167,857 shares of Common
     Stock held by The Wetmann Trust and 163,500 Shares of Common Stock held by
     the Corey-Bloom Family Trust.


                              CERTAIN TRANSACTIONS

STOCK OPTIONS AND AWARDS

     During the last fiscal year, various executive officers and a director were
granted options to purchase shares of Common Stock pursuant to the Omnibus Plan,
the Amended and Restated 1989 Non-Qualified Stock Option Plan or the Stock
Option Plan for Non-Employee Directors.


PRODUCT DEVELOPMENT AGREEMENT WITH ALKERMES CLINICAL PARTNERS, L.P.

     Pursuant to a Product Development Agreement dated March 6, 1992 between the
Company and Alkermes Clinical Partners, L.P. (the "Partnership"), the Company
conducts certain research and development on behalf of the Partnership. Alkermes
Development Corporation II ("ADC II"), a wholly owned subsidiary of the Company,
is the general partner of the Partnership. Richard F. Pops, a director and the
Chief Executive Officer of the Company, is a director and the President and
Chief Executive Officer of ADC II. Until funding was completed in the quarter
ended June 30, 1996, the Company was reimbursed by the Partnership for its
actual costs incurred in conducting such research and development, and also
received a management fee of 10% of such costs. For the fiscal year ended March
31, 1997, the Company recorded revenue of $1,415,313 from the Partnership
pursuant to the Product Development Agreement. Since the completion of funding
from the Partnership, Alkermes has used its own resources, and intends to
continue to use its own resources, to develop RMP-7, but may be forced to seek
alternative sources of funding, including additional collaborators.


                                 OTHER BUSINESS

     The Board of Directors does not intend to present to the Meeting any
business other than the election of directors and the approval of the amendment
to the Omnibus Plan. If any other matter is presented to the Meeting which under
applicable proxy regulations need not be included in this Proxy Statement or
which the Board of Directors did not know a reasonable time before this
solicitation would

                                       20

<PAGE>   23

be presented, the persons named in the accompanying proxy will have
discretionary authority to vote proxies with respect to such matter in
accordance with their best judgment.

                              INDEPENDENT AUDITORS

     Deloitte & Touche LLP, independent auditors, audited the consolidated
financial statements of the Company for the fiscal year ended March 31, 1997.
Representatives of Deloitte & Touche LLP are expected to attend the Meeting,
will have the opportunity to make a statement if they desire to do so and are
expected to be available to respond to appropriate questions. The Board of
Directors has selected Deloitte & Touche LLP as the independent auditors to
audit the Company's consolidated financial statements for the fiscal year ending
March 31, 1998.

                      DEADLINE FOR SHAREHOLDERS PROPOSALS

     The Company must receive any proposal which a shareholder wishes to submit
at the 1998 annual meeting of shareholders before February 27, 1998 if the
proposal is to be considered by the Board of Directors for inclusion in the
proxy material for that meeting.

             SECTION 16(a) BENEFICIAL OWNERSHIP REPORTING COMPLIANCE

     Section 16(a) of the Exchange Act requires the Company's directors and
executive officers, and persons who beneficially own more than ten percent of
the Company's Common Stock, to file with the Securities and Exchange Commission
("SEC") initial reports of ownership and reports of changes in ownership of
Common Stock. Executive officers, directors and greater than ten percent
shareholders are required by SEC regulations to furnish the Company with copies
of all Section 16(a) forms they file. Professor Langer is a beneficiary of The
Wetmann Trust but, has no voting or investment power with respect to the shares
held by The Wetmann Trust, which sold 20,000 shares of Common Stock in May,
1996. The Wetmann Trust timely filed a Form 4 reporting the sale of only 10,000
shares of Common Stock. The error was discovered in July, and an amended Form 4
was filed to reflect the sale of all 20,000 shares. To the Company's knowledge,
based solely on review of the copies of such reports furnished to the Company
and written representations that no other reports were required, for the fiscal
year ended March 31, 1997, all Section 16(a) filing requirements applicable to
its executive officers, directors, officers and greater than ten percent
shareholders were complied with.

                                              By Order of the Board of Directors

                                              Morris Cheston, Jr.
                                              Secretary

June 27, 1997



                                       21

<PAGE>   24
                                  DETACH HERE

PROXY

                                 ALKERMES, INC.

                            CAMBRIDGE, MASSACHUSETTS

       PROXY SOLICITED ON BEHALF OF THE BOARD OF DIRECTORS OF THE COMPANY
          FOR ANNUAL MEETING OF SHAREHOLDERS TO BE HELD JULY 25, 1997

    The undersigned shareholder of Alkermes, Inc. hereby appoints Michael J.
Landine and Diane Fucci, and each of them, attorneys and proxies, with power of
substitution in each of them, to vote and act for and on behalf of the
undersigned at the annual meeting of shareholders of the Company to be held at
the offices of the Company, 64 Sidney Street, Cambridge, Massachusetts 02139,
at 10:00 a.m., July 25, 1997, and at all adjournments thereof, according to the
number of shares which the undersigned would be entitled to vote if then
personally present, as indicated hereon and in their discretion upon such other
business as may come before the meeting, all as set forth in the notice of the
meeting and in the proxy statement furnished herewith, copies of which have
been received by the undersigned; hereby ratifying and confirming all that said
attorneys and proxies may do or cause to be done by virtue hereof.

    It is agreed that unless otherwise marked on the other side, said
attorneys and proxies are appointed with authority to vote FOR the directors
and the proposal listed on the other side hereof.

(PLEASE FILL IN, SIGN AND DATE ON THE OTHER SIDE AND RETURN PROMPTLY IN THE
ENCLOSED ENVELOPE)
<PAGE>   25


                                  DETACH HERE

[X] PLEASE MARK
    VOTES AS IN
    THIS EXAMPLE.

        THE BOARD OF DIRECTORS RECOMMENDS VOTING "FOR" PROPOSALS 1 AND 2.

1.  ELECTION OF DIRECTORS

Nominees: Floyd E. Bloom, Robert A. Breyer, John K. Clarke,
Robert S. Langer, Richard F. Pops, Alexander Rich, Paul Schimmel
and Michael A. Wall.


        FOR ALL                              WITHHOLD
       NOMINEES   [ ]                  [ ]  AUTHORITY
     (except as                              FOR ALL 
    indicated in                             NOMINEES
    space below)  
      
- -----------------------------------------------------------------
(To Withhold Authority to vote for any individual 
nominee, print the nominee's name above.)

 
                                                     FOR    AGAINST   ABSTAIN
2. Proposal to approve the amend-
   ment to the Alkermes Amended and                  [ ]      [ ]       [ ]
   Restated 1990 Omnibus Stock
   Option Plan to increase to
   2,500,000 the number of shares
   issuable upon the exercise of
   options granted thereunder, an
   increase of 750,000 shares.

           MARK HERE                        MARK HERE
         FOR ADDRESS  [ ]                  IF YOU PLAN  [ ]
         CHANGE AND                         TO ATTEND
        NOTE AT LEFT                       THE MEETING
                                          JULY 25, 1997  

Signature should be the same as the name printed at the left. Executors,
administrators, trustees, guardians, attorneys, and officers of corporations
should add their title when signing.



Signature:                 Date:       Signature:                 Date:
          -----------------     -------          -----------------     ---------

<PAGE>   1
                                                                      Exhibit 23





INDEPENDENT AUDITORS' CONSENT


We consent to the incorporation by reference in Registration Statements of
Alkermes, Inc. on Form S-8 (File Nos. 33-44752, 33-58330, 33-97468, and
333-13283) of our report dated May 23, 1997, appearing in and incorporated by
reference in the Annual Report on Form 10-K of Alkermes, Inc. for the year ended
March 31, 1997.


/s/ Deloitte & Touche LLP

DELOITTE & TOUCHE LLP
Boston, Massachusetts
June 27, 1997

<TABLE> <S> <C>

<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE 10-K FOR
THE YEAR ENDED MARCH 31, 1997 AND IS QUALIFIED IN ITS ENTIRETY BY REFERENCE TO
SUCH FINANCIAL STATEMENTS.
</LEGEND>
<MULTIPLIER> 1,000
       
<S>                             <C>
<PERIOD-TYPE>                   12-MOS
<FISCAL-YEAR-END>                          MAR-31-1997
<PERIOD-START>                             APR-01-1996
<PERIOD-END>                               MAR-31-1997
<CASH>                                           2,799
<SECURITIES>                                    82,498
<RECEIVABLES>                                        0
<ALLOWANCES>                                         0
<INVENTORY>                                          0
<CURRENT-ASSETS>                                89,868
<PP&E>                                          15,737
<DEPRECIATION>                                 (7,289)
<TOTAL-ASSETS>                                 104,697
<CURRENT-LIABILITIES>                            8,201
<BONDS>                                         10,914
                                0
                                          0
<COMMON>                                           207
<OTHER-SE>                                      78,944
<TOTAL-LIABILITY-AND-EQUITY>                   104,697
<SALES>                                              0
<TOTAL-REVENUES>                                19,827
<CGS>                                                0
<TOTAL-COSTS>                                   29,554
<OTHER-EXPENSES>                                     0
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                               1,381
<INCOME-PRETAX>                               (18,798)
<INCOME-TAX>                                         0
<INCOME-CONTINUING>                           (18,798)
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                  (18,798)
<EPS-PRIMARY>                                   (1.03)
<EPS-DILUTED>                                   (1.03)
        

</TABLE>


© 2022 IncJournal is not affiliated with or endorsed by the U.S. Securities and Exchange Commission