ENDOREX CORP
10KSB, 1998-03-27
PHARMACEUTICAL PREPARATIONS
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                       SECURITIES AND EXCHANGE COMMISSION
                            WASHINGTON, D. C. 20549
                           -------------------------
 
                                  FORM 10-KSB
 
(MARK ONE)
 
[X]                 ANNUAL REPORT UNDER SECTION 13 OR 15(D)
                     OF THE SECURITIES EXCHANGE ACT OF 1934
 
FOR THE FISCAL YEAR ENDED DECEMBER 31, 1997
 
[ ]               TRANSITION REPORT UNDER SECTION 13 OR 15(D)
                     OF THE SECURITIES EXCHANGE ACT OF 1934
 
FOR THE TRANSITION PERIOD FROM                     TO
                               -------------------    -------------------

COMMISSION FILE NUMBER: 0-11572
 
                                 ENDOREX CORP.
                 (Name of small business issuer in its charter)
 
<TABLE>
<S>                                                <C>
                  DELAWARE                                          41-1505029
      (State or other jurisdiction of                            (I.R.S. Employer
       incorporation or organization)                          Identification No.)
           900 NORTH SHORE DRIVE
            LAKE BLUFF, ILLINOIS                                      60044
  (Address of principal executive offices)                          (Zip Code)
</TABLE>
 
Issuer's telephone number, including area code: 847-604-7555
 
Securities registered under Section 12(b) of the Exchange Act:
 
<TABLE>
<S>                                                         <C>
                                                                          NAME OF EACH EXCHANGE ON
                 TITLE OF EACH CLASS                                          WHICH REGISTERED
- -----------------------------------------------------       -----------------------------------------------------
                        None                                                        None
</TABLE>
 
Securities registered under Section 12(g) of the Exchange Act:
                    COMMON STOCK, PAR VALUE $.001 PER SHARE
                                (Title of class)
 
     Check whether the issuer (1) filed all reports required to be filed by
Section 13 or 15(d) of the Exchange Act during the past 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  [ ]
 
     Check if there is no disclosure of delinquent filers in response to Item
405 of Regulation S-B is not contained in this form, and no disclosure will 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-KSB
or any amendment to this Form 10-KSB.  [ ]
 
     Revenues for its most recent fiscal year were: $-0-.
 
     The aggregate market value of the voting stock held by non-affiliates
computed by reference to the average bid and asked prices of such stock, as of
February 27, 1998 was $49,400,000. Non-affiliates have been determined on the
basis of holdings set forth under Item 11 of this Annual Report on Form 10-KSB.
 
     As of February 27, 1998 the issuer had 9,962,666 shares of Common Stock
outstanding.
 
                         DOCUMENTS INCORPORATED BY REFERENCE
 
     The definitive proxy statement of Endorex Corp. in connection with the
annual meeting to be held on or about May 13, 1998 is incorporated by reference
into Part III of this Form 10-KSB.
 
     Transitional Small Business Issuer:  Yes  [ ]     No  [X]
 
================================================================================
<PAGE>   2
 
                                     PART I
 
ITEM 1. DESCRIPTION OF BUSINESS.
 
THE COMPANY
 
     Endorex Corp. (the "Company") is a development stage biotechnology company
involved in oral drug delivery and cancer therapy.
 
     In August 1996, the Company hired Mr. Michael Rosen as its President and
Chief Executive Officer. Prior to joining the Company, Mr. Rosen was a senior
executive with several pharmaceutical and biotechnology companies. Under Mr.
Rosen's direction, the Company has changed its original research and development
focus on immunotherapy to create a new hybrid company with two components: 1) a
novel cancer products company and 2) a platform drug delivery company. In
addition, Mr. Rosen has eliminated drug discovery activities and focused the
Company on acquiring complementary and more advanced stage technologies from key
universities and government institutions.
 
     In October 1996, the Company established its majority owned subsidiary,
Orasomal Technologies, Inc. ("Orasomal"), to develop its newly acquired oral
delivery technology. In December 1996, Orasomal obtained an exclusive license
from the Massachusetts Institute of Technology ("M.I.T.") for technology for the
oral delivery of vaccines, allergens and therapeutics via stable liposomal
technology. In July 1997, the Company formed another majority owned subsidiary,
Wisconsin Genetics, Inc. ("WGI"), which signed an exclusive worldwide license
agreement with the Wisconsin Alumni Research Foundation ("WARF"), the office
designated to license discoveries made by University of Wisconsin -- Madison
scientists, for the development and commercialization of a new cancer drug
candidate, perillyl alcohol (POH).
 
     In January 1998, Endorex teamed up with Elan Corporation, plc ("Elan"), one
of the leading drug delivery companies in the world, to establish a joint
venture for the exclusive research, development and commercialization of oral
vaccines. The joint venture will combine novel existing and future delivery
systems of the two companies for the development of human vaccines, an estimated
$4 billion market that is projected to increase to $7 billion by 2001, as well
as for the estimated $2 billion veterinary vaccine market.
 
     The Company's business strategy is to develop products in the following
areas: (1) Oral delivery of drugs and vaccines for which the only existing form
of administration is injection and (2) Novel cancer drugs. To accomplish this,
the Company seeks to identify novel products with good intellectual property
positions from major research-based universities and in-license such
technologies. As a result, the Company eliminated drug discovery activities, and
now relies on state-of-the-art science at major universities and government
institutions. This strategy eliminates development time, costs, and risks, as
acquired products have already undergone extensive evaluation and development.
 
     The Company plans to develop its oral delivery systems for vaccines in a
newly formed joint venture with Elan. The Company will continue to develop oral
delivery of peptides, proteins and other therapeutics independently of the Elan
joint venture. However, in both cases, the Company's goal will be to partner
with major pharmaceutical companies desirous of "creating" an oral version of an
existing or new injectable drug or vaccine, as well as extending the patent life
of the product with the joint venture patents. Regarding the Company's cancer
therapy program, it is the Company's intent to develop its own drugs through at
least Phase II trials in the United States and then seek partners for further
clinical development and marketing of these drugs for the three major markets:
U.S., Europe and Japan.
 
     The Company has no current plans to market or manufacture its own drugs. It
will, however, seek strategic relationships for both of these activities.
 
     Endorex Corp. was incorporated in January 1987 as ImmunoTherapeutics, Inc,
a wholly-owned subsidiary of BiologicalTherapeutics, Inc. ("BTI"). BTI was
incorporated on December 19, 1984 and commenced operations on February 15, 1985.
On March 30, 1987 BTI was merged into the Company. The Company's principal
executive office is located at 900 North Shore Drive, Lake Bluff, Illinois 60044
and its
 
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telephone number is (847) 604-7555. The Company also has recently acquired new
research and development laboratories located at 28101 N. Ballard Drive, Lake
Forest, Illinois 60045.
 
RESEARCH AND DEVELOPMENT PROGRAMS
 
     Research and Development expenditures for the periods ending December 31,
1997 and 1996 were approximately $1.8 million and $1.1 million, respectively.
The Company is directing its research and product development efforts in two
areas: oral delivery systems and novel cancer therapy.
 
ORAL DELIVERY TECHNOLOGY
 
     Many macromolecules (proteins, peptides, antigens), cannot currently be
delivered orally because they are degraded in the G.I. tract. This includes many
of the new biotech therapies, but also includes hormones such as insulin, human
growth hormones, etc. Additionally, it is estimated that 96% of all vaccines in
the U.S. are currently injectable. Injections are painful, particularly in
children and the elderly, and are more expensive to administer because they
require a doctor or nurse, often in a hospital or out-patient setting. Oral
delivery of drugs and vaccines is clearly less expensive and preferred by the
patient.
 
     ORASOMAL -- Endorex formed Orasomal to develop a technology licensed from
M.I.T. for the oral and mucosal delivery of vaccines, allergens, proteins and
peptides via polymerized liposomes (the "Orasome(TM) technology"). The key
inventor of this science is the renowned drug delivery expert, Robert Langer,
Ph.D., who is a member of three National Academies (Science, Medicine and
Engineering), author of 265 patents and 540 articles, and editor 12 books.
 
     This Orasome(TM) technology is based on lipids that can easily be assembled
into structures that efficiently capture drugs and proteins, bypassing the
destructive action of stomach acids and intestinal degradative enzymes -- while
being taken up efficiently by crucial key cells in the intestinal tract. Because
of the unique ability of these cross-linked liposomes to withstand the cleansing
activity of bile salts, digestive enzymes, and gastric acids, this proprietary
liposomal technology may be utilized practically and commercially for the oral
delivery of many therapeutics.
 
     ELAN JOINT VENTURE -- Endorex recently formed with Elan a joint venture for
the exclusive research, development and commercialization of oral vaccines. The
joint venture will combine novel existing and future delivery systems of the two
companies for the development of human and veterinary vaccines. The Company and
Elan plan to expend approximately $1.5 million each in the first year to
formalize the business plan, further develop the existing delivery systems of
the two companies into a portfolio of technology for the oral delivery of
vaccines, and develop preclinical data to introduce to vaccine companies for
collaborations.
 
     PROTEINS AND PEPTIDES -- Orasomal continues to develop its Orasome(TM)
technology for drugs, independent of the joint venture. Orally delivered
hormones, such as insulin and human growth hormone are being evaluated in animal
models at Johns Hopkins University Hospital. Orasomal also plans to evaluate
oral delivery of allergens and cancer therapy. The Company believes the
technology has application to oral delivery of cytokines, growth factors, gene
therapy, as well as other hormones.
 
CANCER THERAPY
 
     Traditional cancer therapy relies on surgery, radiation and chemotherapy
with limited efficacy in select tumors. Cancers can be divided into two groups:
1) potentially curable (e.g., testicular cancer and childhood leukemia) and 2)
treatable with varying degrees of response.
 
     New directions in cancer therapy include gene therapy, cell therapy,
angiogenesis inhibitors, photodynamic therapy, immunotherapy, novel sources of
traditional chemotherapy (e.g., natural plants and marine organisms). The
Company's cancer program is focusing on these last two areas: immunotherapy and
natural cancer therapy.
 
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     IMMUNOTHERAPY PROGRAM -- Endorex is working in two aspects of
immunotherapy: macrophage activators and vaccine adjuvants. The objective of
immunotherapy is to stimulate or enhance the body's own immune system to defend
itself against disease or infection.
 
     Macrophages are one of the body's key cell types involved in the first line
defense against invading microbes and metastasizing cancer cells. Along with
other cells found in the blood, macrophages or "scavenger cells" recognize and
destroy cancer cells and foreign invaders by directly engulfing them or
secreting substances that directly kill the undesirable cells or invaders.
However, in order to perform this function efficiently, macrophages must be
triggered to produce lymphokines, antimicrobial substances, cellular recognition
molecules, and other molecules involved in the process. The macrophage
activation process can be triggered effectively in humans by one of the
Company's patented compounds, ImmTher(R), a macrophage activator derived from
muramyl dipeptide (MDP), a naturally occurring component of bacterial cell walls
that has the capacity to activate macrophages. ImmTher has been evaluated in
Phase I and II trials in large tumors in advanced stage colorectal cancer and
melanoma patients. The drug has a favorable toxicity profile and, as stand-alone
therapy, impeded disease progression in some patients, but it was evident that
this type of therapy is not particularly effective for large tumors. Currently,
in conjunction with M.D. Anderson Cancer Center of The University of Texas,
Endorex has initiated a new Phase II trial with ImmTher as an agent to treat
micrometastic disease associated with key pediatric tumors following surgery and
intensive chemotherapy.
 
     Adjuvants are agents designed to increase the body's immune response to an
antigen that is the basis of a particular vaccine. Many new vaccines, resulting
from recombinant DNA technology and peptide chemistry, invoke less than desired
immune responses that need bolstering for even minimal effectiveness. Endorex
has developed another compound related to MDP, Theramide(TM), which is capable
of inducing protective responses to several experimental vaccines for certain
cancers and chronic infections. Endorex believes that Theramide may have
widespread application to boost the body's response to many new and old
vaccines. The Company is currently evaluating the efficacy of this vaccine
adjuvant in several infectious disease vaccines and in conjunction with a tumor
vaccine.
 
     NATURAL CANCER THERAPY -- In 1997, WGI signed an exclusive worldwide
license agreement with the WARF for the development and commercialization of a
new cancer drug, PERILLYL ALCOHOL ("POH"). POH is a synthetic compound that is a
member of a new class of anti-cancer agents, monoterpenes, which have shown
anti-tumor and preventative activity against a wide range of tumor types in
preclinical studies at non-toxic dose levels. Monoterpenes are natural compounds
produced by plants and are found in commonly consumed fruits and vegetables, and
have multiple cellular effects including the modulation of the cellular levels
of growth factors and their receptors.
 
     Monoterpenes selectively inhibit cell growth in a wide variety of rodent
tumors and human cancer cell lines and also act to induce programmed cell death
(apoptosis). A group of investigators at the University of Wisconsin have led
the development of this new class of compounds with the support of the National
Cancer Institute ("NCI"). POH has completed Phase I human trials sponsored by
the NCI at several centers including the University of Wisconsin, Yale
University, Fox Chase Cancer Center and is completing a trial at Memorial Sloan
Kettering Cancer Center. Based on results obtained in over 70 cancer patients in
Phase I trials during the last 22 months, the University of Wisconsin
Comprehensive Cancer Center has begun enrollment of patients in NCI-sponsored
Phase II studies for breast and prostate cancer. A third multi-center, NCI
sponsored Phase II trial is being conducted by The Eastern Cooperative Oncology
Group (ECOG) for evaluation of POH in advanced epithelial ovarian cancer.
 
GOVERNMENT REGULATION
 
     Prior to marketing, each of the Company's products must undergo an
extensive regulatory approval process conducted by the FDA and applicable
agencies in other countries. The Company is currently conducting Phase II
clinical trials for its two cancer drugs, perillyl alcohol and ImmTher. See also
"Certain Factors that may Effect Future Results, Financial Condition and the
Market Price of Securities Government Regulation -- Need for FDA and Other
Regulatory Approval."
 
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     In connection with those trials, the FDA has approved an Investigational
New Drug (IND) application permitting the evaluation of these drugs in human
patients based on results of studies in animals.
 
PATENTS AND OTHER PROPRIETARY RIGHTS
 
     The Company relies on patent rights, trade secrets and nondisclosure
agreements to establish and protect its proprietary rights in its technologies.
Despite these precautions, it may be possible for unauthorized third parties to
utilize the Company's technology or to obtain and use information that the
Company regards as proprietary. The laws of some foreign countries do not
protect the Company's proprietary rights in its processes and products to the
same extent as do the laws of the United States.
 
     The Company currently has the following patent portfolio in the United
States: (1) The Company has two issued patents and two pending, (2) Orasomal has
one notice of allowance and two pending applications, and (3) WGI has two issued
patents. In addition, the Company has numerous foreign patents issued and patent
applications pending.
 
EMPLOYEES
 
     The Company currently has thirteen (13) full-time employees. Nine full-time
research and development personnel are currently employed in drug development
and quality control, including one M.D. and five Ph.D.'s. It expects to have 19
employees by the end of 1998 with the addition of at least three Ph.D.'s.
 
     During the last fourteen months, the Company has hired a new management
team. In addition to Michael Rosen, CEO, the Company hired Robert Brey, Ph.D. as
Vice President, Research and Development. Dr. Brey is the key scientific
executive for the Orasome technology, including the Elan joint venture. David G.
Franckowiak, CPA, CMA was hired in April 1997 as Controller/Treasurer and was
promoted to Vice President, Finance and Administration in January 1998. In
November 1997, Rick Wilson, MD, JD joined as Executive Vice President and Chief
Scientific Officer of WGI. He was appointed Executive Vice President, Clinical
Development and Regulatory Affairs of the Company in January 1998 and is
responsible for the Company's clinical development of ImmTher and POH.
 
     In February 1998, the Company announced moving its North Dakota research
and development operations to a new facility in Chicago. In addition, Gerald
Vosika, M.D., Chairman of the Board and Scientific Director, resigned to pursue
scientific activities with a new start-up biotech company based in Fargo, ND.
The Company is negotiating an out-license to the new company for development of
non-competing technology that was initiated at Endorex.
 
CERTAIN FACTORS THAT MAY EFFECT FUTURE RESULTS, FINANCIAL CONDITION AND THE
MARKET PRICE OF SECURITIES
 
     NEED FOR SUBSTANTIAL ADDITIONAL FUNDS, RISK OF INSOLVENCY. The Company had
approximately $15.7 million of cash, cash equivalents and marketable securities
at December 31, 1997. The Company may be required to seek additional financing
in the future to continue operations during such period in the event of cost
overruns, unanticipated expenses, a determination to pursue additional research
projects, or the failure to receive funds anticipated from other sources. The
Company will require substantial additional funds to finance its business
activities on an ongoing basis. The Company's actual future capital requirements
will depend on numerous factors, including, but not limited to, costs associated
with technologies and products which it may license from third parties, progress
in its research and development programs, including preclinical and clinical
trials, costs of filing and prosecuting patent applications and, if necessary,
enforcing issued patents or obtaining additional licenses to patents, competing
technological and market developments, the cost and timing of regulatory
approvals, the ability of the Company to establish collaborative relationships,
and the cost of establishing manufacturing, sales and marketing capabilities.
The Company has no current commitment to obtain other additional funds and is
unable to state the amount or potential source of any other additional funds.
 
     Because of the Company's potential long-term capital requirements, it may
undertake additional equity offerings whenever conditions are favorable, even if
it does not have an immediate need for additional capital
 
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at that time. There can be no assurance that the Company will be able to obtain
additional funding when needed, or that such funding, if available, will be
obtainable on reasonable terms. Any such additional funding may result in
significant dilution to existing stockholders. If adequate funds are not
available, the Company may be required to accept unfavorable alternatives,
including (i) the delay, reduction or elimination of research and development
programs, capital expenditures, and marketing and other operating expenses, (ii)
arrangements with collaborative partners that may require the Company to
relinquish material rights to its products that it would not otherwise
relinquish, or (iii) a merger of the Company or a sale of the Company or its
assets.
 
     EARLY STAGE OF DEVELOPMENT. The Company is a development state enterprise
and expects no significant revenue from the sale of products in the near future.
The Company's proprietary immunomodulator, ImmTher, has completed some Phase II
clinical trials for cancer with limited response in gross metastatic disease and
its immuno-adjuvant, Theramide, has completed a Phase I clinical trial for
cancer. The Company plans to initiate new Phase II clinical trials for ImmTher
in treating micro-metastasis in pediatric sarcomas with two major cancer
centers. For Theramide, the Company is completing preclinical data for new phase
I trials as an adjuvant for a vaccine program. Additionally, POH has completed
several Phase I trials as an anti-cancer drug and has started three Phase II
trials in breast, ovarian and prostate cancers. The Company's oral delivery
technology is in the preclinical evaluation stage. As a result, the Company must
be evaluated in light of the problems, delays, uncertainties and complications
encountered in connection with early-stage biopharmaceutical development. The
risks include, but are not limited to, the possibilities that any or all of the
Company's potential products will be found to be ineffective or toxic, or fail
to receive necessary regulatory clearances in the United States or abroad. To
achieve profitable operations, the Company must successfully develop, obtain
regulatory approval for, introduce and successfully market through a larger
pharmaceutical partner at a profit, products that are currently in the research
and development phase. The Company is currently not profitable, and no assurance
can be given that the Company's research and development efforts will be
successful, that required regulatory approvals will be obtained, that any of the
Company's proposed products will be safe and effective, that any such products,
if developed and introduced, will be successfully marketed or achieve market
acceptance, or that such products can be marketed at prices that will allow
profitability to be achieved or sustained. Failure of the Company to
successfully develop, obtain regulatory approval for, introduce and market its
products under development would have a material adverse effect on the business,
financial condition and results of operations of the Company.
 
     HISTORY OF LOSSES; UNCERTAINTY OF FUTURE FINANCIAL RESULTS. The Company has
experienced significant operating losses since its inception, and expects to
incur losses for the next several years. As of December 31, 1997, the Company's
accumulated deficit was $13.5 million. The amount of net losses may vary
significantly from year-to-year and quarter-to-quarter and depend on, among
other factors, the success of the Company in securing collaborative partners and
the progress of research and preclinical and clinical development programs. The
Company's ability to attain profitability will depend, among other things, on
its successfully completing development of its product candidates, obtaining
regulatory approvals, establishing manufacturing, sales and marketing
capabilities and obtaining sufficient funds to finance its activities. There can
be no assurance that the Company will be able to achieve profitability or that
profitability, if achieved, can be sustained.
 
     DEPENDENCE ON ELAN JOINT VENTURE. As described more fully under
"Description of Business -- Research and Development Programs," the Company
recently established a joint venture with Elan for the exclusive research,
development and commercialization of oral and mucosal prophylactic and
therapeutic vaccines. As part of the joint venture, the Company will be
obligated to fund the Elan joint venture's research and development activities,
in an amount of approximately $1,500,000 during the first year of the joint
venture and in proportion to its ownership interest in the joint venture
thereafter. In the event that the Company is unable to have sufficient resources
to meet its obligations under the Elan joint venture, or if by meeting those
funding obligations, the Company is therefore unable to have sufficient
resources to fund its other research and development activities, such funding
obligations could have a material adverse effect on the Company's business,
financial condition or results of operations.
 
     LIMITED EXPERIENCE AND DEPENDENCE ON THIRD PARTIES FOR COMPLETION OF
CLINICAL TRIALS, MANUFACTURING AND MARKETING. The Company has no experience with
receipt of government approvals or marketing
 
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pharmaceutical products and has limited experience with clinical testing and
manufacturing. The Company may seek to form alliances with established
pharmaceutical companies for the testing, manufacturing and marketing of, and
pursuit of regulatory approval for, its products. There can be no assurance that
the Company will be successful in forming such alliances or that the Company's
partners would devote adequate resources to, and successfully market, the
Company's products. If the Company instead performs such tasks itself, it will
be required to develop expertise internally or contract with third parties to
perform these tasks. This will place increased demands on the Company's
resources, requiring the addition of new management personnel and the
development of additional expertise by existing management personnel. The
failure to acquire such services or to develop such expertise could materially
adversely affect prospects for the Company's success. All of the Company's
scientific and clinical advisors are employed by others and may have commitments
to or consulting or advisory contracts with other entities that may limit their
availability to the Company.
 
     RELIANCE ON PATENTS AND OTHER PROPRIETARY RIGHTS. The pharmaceutical
industry places considerable importance on obtaining patent and trade secret
protection for new technologies, products and processes. The Company's success
will depend, in part, on its ability to obtain protection for its products and
technologies under United States and foreign patent laws and other intellectual
property laws, to preserve its trade secrets and to operate without infringing
the proprietary rights of third parties. There can be no assurance that the
research conducted by or on behalf of the Company will result in any patentable
technology or products. Even if patents are obtainable, the procedure for
obtaining patents is expensive, time consuming and can be subject to lengthy
litigation. No assurance can be given that patents issued to or licensed by the
Company will not be challenged, invalidated or circumvented, or that the rights
granted thereunder will provide competitive advantages to the Company. There can
be no assurance that the Company's patent applications will be approved, that
the Company will develop additional products that are patentable, that any
issued patent will provide the Company with any competitive advantage or
adequate protection for its inventions or will not be challenged by others, or
that the patents of others will not have an adverse effect on the ability of the
Company to do business. Competitors may have filed applications, may have been
issued patents or may obtain additional patents and proprietary rights relating
to products or processes competitive with those of the Company. Furthermore,
there can be no assurance that others will not independently develop similar
products, duplicate any of the Company's products or design around any patented
products developed by the Company. Moreover, it is possible, with respect to
some patentable items, that the Company may conclude that better protection
would be afforded by not seeking patents. Although the Company has endeavored,
and will continue to endeavor, to prevent disclosure of any confidential
information by adopting a policy to bind its scientific advisors and scientific
and management employees and consultants by confidentiality agreements. No
assurance can be given that others will not independently develop substantially
equivalent proprietary information and techniques or otherwise gain access to
the Company's trade secrets, or that the Company can effectively protect its
rights to its unpatented trade secrets. Any such discovery or disclosure would
likely have an adverse effect on the Company. The Company currently has several
patents issued and patent applications pending in the United States and foreign
countries. Although the Company intends to apply for additional patents, there
can be no assurance that the Company will obtain patents either under the
pending applications or any future applications or that any of its existing or
any future patent will provide effective protection against competitive
products. If patent or other proprietary rights cannot be obtained and
maintained by the Company, its products may face significantly increased
competition.
 
     The application of patent law to the area of biotechnology is relatively
new and has resulted in considerable litigation. The ability of the Company to
obtain patents, licenses and similar rights and the nature, extent and
enforceability of the intellectual property rights, if any, that are obtained as
a result of its research programs involve complex legal and factual issues. For
example, the Company is dependent upon its license of oral delivery technology
from M.I.T. and its license of POH from the WARF. No assurance can be given that
the technology underlying such license will be profitable, or that the Company
will retain its license for such technology or that the Company will obtain
patent protection outside the United States. The issues are more significant
with respect to any product based upon natural substances, for which available
patent protection may be limited due to the prior use or reported utility of
such products (or their natural sources) to treat various disorders or diseases.
There can be no assurance as to the degree of protection that proprietary
rights, when and if established, will afford the Company. To the extent that the
Company relies on trade secret
 
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protection and confidentiality agreements to protect technology, there can be no
assurance that others will not independently develop similar technology, or
otherwise obtain access to the Company's findings or research materials
embodying those findings.
 
     There is also a substantial risk in the rapidly developing biotechnology
industry that patents and other intellectual property rights held by the Company
could be infringed by others or that products developed by the Company or their
method of manufacture could be covered by patents owned by other companies. To
the extent that any infringement should occur with respect to any patents issued
to the Company or licenses granted to the Company, or if the Company is alleged
to have infringed on patents or licenses held by others, the Company could be
faced with the expensive prospect of litigating such claims; if the Company were
to have insufficient funds on hand to finance its litigation, it might be forced
to negotiate a license with such other parties or to otherwise resolve such a
dispute on terms less favorable to the Company than could result from successful
litigation.
 
     UNCERTAINTY OF CLINICAL TRIALS AND RESULTS. The results of clinical trial
and preclinical testing for the Company's products are subject to varying
interpretations. Furthermore, studies conducted with alternative designs or on
alternative populations could produce results that vary from those expected.
Therefore, there can be no assurance that the results or the Company's
interpretation of them will be accepted by governmental regulators or the
medical community. Even if the development of the Company's products in the
preclinical phase advances to the clinical stage, there can be no assurance that
they will prove to be safe and effective. The products that are successfully
developed, if any, will be subject to requisite regulatory approval prior to
their commercial sale, and the approval, if obtainable, may take several years.
Generally, only a very small percentage of the number of new pharmaceutical
products initially developed is approved for sale. Even if new products are
approved for sale, there can be no assurance that they will be commercially
successful. The Company may encounter unanticipated problems relating to
development, manufacturing, distribution and marketing, some of which may be
beyond the Company's financial and technical capacity to solve. The failure to
address such problems adequately could have a material adverse effect on the
Company's business, financial condition or results of operations. No assurance
can be given that the Company will succeed in the development and marketing of
any new drug products, or that they will not be rendered obsolete by products of
competitors.
 
     UNCERTAINTY OF HEALTH CARE REFORM MEASURES. Federal, state and local
officials and legislators (and certain foreign government officials and
legislators) have proposed or are reportedly considering proposing a variety of
reforms to the health care systems in the United States and abroad. The Company
cannot predict what health care reform legislation, if any, will be enacted in
the United States or elsewhere. Significant changes in the health care system in
the United States or elsewhere are likely to have a substantial impact over time
on the manner in which the Company conducts its business. Such proposals and
changes could have a material adverse effect on the Company's ability to raise
capital. Furthermore, the Company's ability to commercialize its potential
products may be adversely affected to the extent that such proposals have a
material adverse effect on the business, financial condition and profitability
of other companies that are prospective corporate partners with respect to
certain of the Company's proposed products.
 
     UNCERTAIN EXTENT OF PRICE FLEXIBILITY AND THIRD-PARTY REIMBURSEMENT. The
Company's ability to commercialize its products successfully will depend in part
on the extent to which appropriate reimbursement levels for the cost of such
products and related treatment are obtained from government authorities, private
health insurers and other organizations, such as health maintenance
organizations ("HMOs"). Third party payers are increasingly challenging the
prices charged for medical products and services. Also, the trend towards
managed health care in the United States and the concurrent growth of
organizations such as HMOs, which could control or significantly influence the
purchase of health care services and products, as well as legislative proposals
to reduce government insurance programs, may all result in lower prices for the
Company's products. The cost containment measures that health care providers are
instituting could affect the Company's ability to sell its products and may have
a material adverse effect on the Company.
 
     GOVERNMENT REGULATION; NEED FOR FDA AND OTHER REGULATORY APPROVAL. Prior to
marketing, each of the Company's products must undergo an extensive regulatory
approval process conducted by the U.S. Food and
 
                                        7
<PAGE>   9
 
Drug Administration (the "FDA") and applicable agencies in other countries. The
process, which focuses on safety and efficacy and includes a review by the FDA
of preclinical testing and clinical trials and investigating as to whether good
laboratory and clinical practices were maintained during testing, takes many
years and requires the expenditure of substantial resources. The Company is, and
will be dependent on the external laboratories and medical institutions
conducting its preclinical testing and clinical trials to maintain both good
laboratory practices established by the FDA and good clinical practices. Data
obtained from preclinical and clinical testing are subject to varying
interpretations which could delay, limit or prevent regulatory approval. In
addition, delays or rejection may be encountered based upon changes in FDA
policy for drug approval during the period of development and by the requirement
for regulatory review of each submitted Product License Approval or New Drug
Application. There can be no assurance that, even after such time and
expenditures, regulatory approval will be obtained for any of the Company's
product candidates. Moreover, such approval may entail significant limitations
on the indicated uses for which a drug may be marketed. Even if such regulatory
approval is obtained, a marketed therapeutic product and its manufacturer are
subject to continual regulatory review, and later discovery of previously
unknown problems with a product or manufacturer may result in restrictions on
such product or manufacturing, including withdrawal of such product from the
market. Change in the manufacturing procedures used by the Company for any of
the Company's approved drugs are subject to FDA review, which could have an
adverse effect upon the Company's ability to continue the commercialization or
sale of a drug. The process of obtaining FDA and foreign regulatory approval is
costly and time consuming, and there can be no assurance that any product that
the Company may develop will be deemed to be safe and effective by the FDA. The
Company will not be permitted to market any product it may develop in any
jurisdiction in which the product does not receive regulatory approval.
 
     The Company is also subject to various foreign, federal, state and local
laws, regulations and recommendations (collectively "Governmental Regulations")
relating to safe working conditions, laboratory and manufacturing practices, the
experimental use of animals and the use, manufacture, storage, handling and
disposal of hazardous or potentially hazardous substances, including radioactive
compounds and infectious disease agents, used in connection with the Company's
research and development work and manufacturing processes. Included in this area
is Good Manufacturing Practices ("GMP") compliance and its European equivalent,
ISO 9000. Currently, the Company's manufacturing activities for preclinical and
clinical supplies are not fully in GMP compliance, although the Company expects
to reach full compliance in the near future. There can be no assurance that the
Company will achieve such compliance. Although the Company believes it is in
compliance with all other Governmental Regulations in all material respects
there can be no assurance that the Company will not be required to incur
significant costs to comply with Governmental Regulations in the future.
 
     COMPETITION; TECHNOLOGICAL CHANGE. There is substantial competition in the
pharmaceutical field in general and in vaccine development and lyposomal
formulation in particular. The Company's competitors include companies with
financial resources, and licensing, research and development staffs and
facilities substantially greater than those of the Company. Competitors in the
vaccine development field include major pharmaceutical companies, specialized
biotechnology firms, universities and governmental agencies, including American
Home Products, the Merck Company, SmithKline Beecham, MedImmune, Aviron and
Chiron. Competitors in the liposomal formulation field include The Liposome
Company, NexStar and Sequus. Competitors in the field of the oral delivery of
drugs include Emisphere, which is currently in Phase I trials for oral heparin
and in preclinical development with an oral human growth hormone, and Cortecs,
which has several products in clinical development. Many competitors have
greater experience than the Company in undertaking preclinical testing and
clinical trials and obtaining FDA and other regulatory approvals. There can be
no assurance that the Company's competitors will not succeed in developing
similar technologies and products more rapidly than the Company and that these
technologies and products will not be more effective than any of those that are
being or will be developed by the Company, or that such competitors'
technologies and products will not render the Company's technologies and
products obsolete or noncompetitive.
 
     MANUFACTURING AND MARKETING CAPABILITIES. The Company does not now have,
and probably will not have in the foreseeable future, the resources to
manufacture or directly market on a large commercial scale any products which it
may develop. In connection with the Company's research and development
activities, it
 
                                        8
<PAGE>   10
 
will seek to enter into collaborative arrangements with pharmaceutical companies
to assist in funding development costs, including the costs of clinical testing
necessary to obtain regulatory approvals. It is expected that these entities
will also be responsible for commercial scale manufacturing which must be in
compliance with applicable FDA regulations. The Company anticipates that such
arrangements may involve the grant by the Company of the exclusive or
semi-exclusive right to sell specific products to specified market segments in
particular geographic territories in exchange for a royalty, joint venture,
future co-marketing or other financial interest. The Company believes that these
arrangements will be more effective in promoting and distributing therapeutic
products in the United States in view of the Company's limited resources and the
extensive marketing networks and large advertising budgets of large
pharmaceutical companies. To date, the Company has not entered into any
collaborative marketing agreements or distributorship arrangements for any of
its proposed products and there can be no assurance that the Company will be
able to enter into any such arrangements on favorable terms or at all. The
Company may ultimately determine to establish its own manufacturing and/or
marketing capability, at least for certain products, in which case it will
require substantial additional funds and personnel.
 
     USE OF HAZARDOUS MATERIALS; ENVIRONMENTAL MATTERS. The Company's research
and development involves the controlled use of small quantities of hazardous
materials, chemicals and various radioactive compounds. Although the Company
believes that its safety procedures for handling and disposing of such materials
comply with the standards prescribed by federal, state and local regulations,
the risk of accidental contamination or injury from these materials cannot be
eliminated. In the event of such an accident, the Company could be held liable
for any resulting damages, and any such liability could exceed the resources of
the Company. There can be no assurance that the Company will not be required to
incur significant costs to comply with environmental laws and regulations in the
future, nor that the operations, business or assets of the Company will not be
materially adversely affected by current or future environmental laws or
regulations.
 
     PRODUCT LIABILITY EXPOSURE; LIMITED INSURANCE COVERAGE. The testing and
marketing of pharmaceutical products entails an inherent risk of exposure to
product liability claims from adverse effects of products. The Company has
obtained liability insurance with limits of liability of $1,000,000 for each
claim and $3,000,000 in the aggregate. There is no assurance that current or
future policy limits will be sufficient to cover all possible liabilities.
Further, there can be no assurance that adequate product liability insurance
will continue to be available in the future or that it can be maintained at
reasonable costs to the Company. In the event of a successful product liability
claim against the Company, lack or insufficiency of insurance coverage could
have an adverse effect on the Company.
 
     DEPENDENCE ON KEY PERSONNEL AND SCIENTIFIC ADVISORS; EVOLUTION OF
MANAGEMENT. The Company is dependent on the principal members of its management
and scientific staff, the loss of whose services could impede the achievement of
development objectives. Furthermore, as the Company's focus evolves, the
Company's need for certain skills may diminish and the need for other skills may
arise. Thus, recruiting and retaining qualified scientific personnel to perform
research and development work in the future will also be critical to the
Company's success and may lead to further evolution of the Company's management.
Although the Company believes it will be successful in attracting and retaining
skilled and experienced scientific personnel, there can be no assurance that the
Company will be able to attract and retain such personnel on acceptable terms
given the competition among numerous pharmaceutical and health care companies,
universities and non-profit research institutions for experienced scientists and
managers.
 
     The Company's scientific advisors are employed on a full-time basis by
unrelated employers and some have one or more consulting or other advisory
arrangements with other entities which at times may conflict with their
obligations to the Company. Inventions or processes discovered by such persons,
other than those to which the Company's licenses relate, or those for which the
Company is able to acquire licenses or those which were invented while
performing consulting services under contract to the Company, will most likely
not become the property of the Company, but will remain the property of such
persons or such persons' full-time employers. Failure to obtain needed patents,
licenses or proprietary information held by others could have a material adverse
effect on the Company's business, financial condition or results of operations.
 
                                        9
<PAGE>   11
 
     LIMITED PERSONNEL; DEPENDENCE ON CONTRACTORS. The Company has thirteen
full-time employees. With these exceptions, the Company relies, and for the
foreseeable future will rely, on certain independent organizations, advisors and
consultants to provide certain services with regard to clinical research. There
can be no assurance that their services will continue to be available to the
Company on a timely basis when needed, or that the Company could find qualified
replacements. The Company's advisors and consultants generally sign agreements
that provide for confidentiality of the Company's proprietary information.
However, there can be no assurance that the Company will be able to maintain the
confidentiality of the Company's technology, the dissemination of which could
have a material adverse effect on the Company's business, financial condition or
results of operations.
 
     CONDUCTING BUSINESS ABROAD. Although the Company currently does not conduct
business outside the United States, it is in discussions with potential
strategic partners for the in-licensing and out-licensing of technology and the
development and marketing of its products. No assurance can be given that the
Company will be able to establish arrangements covering foreign countries, that
the necessary foreign regulatory approvals for its product candidates will be
obtained, that foreign patent coverage will be available or that the development
and marketing of its products through such licenses, joint ventures or other
arrangements will be commercially successful. The Company may also have greater
difficulty obtaining proprietary protection for its products and technologies
outside the United States rather than in it, and enforcing its rights in foreign
courts rather than in United States courts.
 
     LIMITED AVAILABILITY OF NET OPERATING LOSS CARRY FORWARDS. For Federal
income tax purposes, net operating loss and tax credit carryforwards as of
December 31, 1997 are approximately $5,224,000 and $322,000, respectively. These
carryforwards will expire beginning in 2004 through 2011. The Tax Reform Act of
1986 provided for a limitation on the use of net operating loss and tax credit
carryforwards following certain ownership changes. The Company believes that the
Private Placement, together with certain prior issuances of Common Stock, is
likely to restrict severely the Company's ability to utilize its net operating
losses and tax credits. Additionally, because U.S. tax laws limit the time
during which net operating loss and tax credit carryforwards may be applied
against future taxable income tax liabilities, the Company may not be able to
fully utilize its net operating loss and tax credits for federal income tax
purposes.
 
     POTENTIAL VOLATILITY OF PRICE; LOW TRADING VOLUME. The market price of the
Common Stock, like that of many other development-stage public pharmaceutical or
biotechnology companies, has been highly volatile and may continue to be in the
future. Factors such as announcements of technological innovations or new
commercial products by the Company or its competitors, disclosure of results of
preclinical and clinical testing, adverse reactions to products, governmental
regulation and approvals, developments in patent or other proprietary rights,
public or regulatory agency concerns as to the safety of products developed by
the Company and general market conditions may have a significant effect on the
market price of the Common Stock and its other equity securities. In addition,
in general, the Common Stock has been thinly traded on the OTC Bulletin Board,
which may affect the ability of the Company's stockholders to sell shares of the
Common Stock in the public market. There can be no assurance that a more active
trading market will develop in the future.
 
     RISKS OF LOW-PRICED STOCK; POSSIBLE EFFECT OF "PENNY STOCK" RULES ON
LIQUIDITY FOR THE COMPANY'S SECURITIES. Since the Company's securities are not
listed on a national securities exchange nor listed on a qualified automated
quotation system, they are, under certain circumstances, subject to Rule 15g-9
under the Securities Exchange Act of 1934, as amended (the "Exchange Act"),
which imposes additional sales practice requirements on broker-dealers that sell
such securities to persons other than established customers and "accredited
investors" (generally, individuals with a net worth in excess of $1,000,000 or
annual incomes exceeding $200,000 or $300,000 together with their spouses). For
transactions covered by this Rule, a broker-dealer must make a special
suitability determination for the purchaser and have received the purchaser's
written consent to the transaction prior to sale. Consequently, such rule may
affect the ability of broker-dealers to sell the Company's securities and may
materially adversely affect the ability of purchasers in this Offering to sell
any of the securities acquired hereby, after subsequent registration, in the
secondary market.
 
     The SEC has adopted regulations that define a "penny stock" to be any
equity security that has a market price (as therein defined) of less than $5.00
per share or with an exercise price of less than $5.00 per share,
 
                                       10
<PAGE>   12
 
subject to certain exceptions. For any transaction involving a penny stock,
unless exempt, the rules require delivery, prior to any transaction in a penny
stock, of a disclosure schedule prepared by the SEC relating to the penny stock
market. Disclosure is also required to be made about sales commissions payable
to both the broker-dealer and the registered representative and current
quotations for the securities. Finally, monthly statements are required to be
sent disclosing recent price information for the penny stock held in the account
and information on the limited market in penny stock.
 
     The foregoing required penny stock restrictions will not apply to the
Company's securities so long as the Company meets certain minimum net tangible
assets or average revenue criteria. Even while the Company's securities are
exempt from such restrictions, the Company would remain subject to Section
15(b)(6) of the Exchange Act, which gives the SEC the authority to restrict any
person from participating in a distribution of penny stock, if the SEC finds
that such a restriction would be in the public interest.
 
     DIVIDENDS. The Company has never paid cash dividends on its Common Stock
and does not anticipate paying any such dividends in the foreseeable future. The
Company currently intends to retain its earnings, if any, for the development of
its business.
 
     CERTAIN INTERLOCKING RELATIONSHIPS; POTENTIAL CONFLICTS OF INTEREST. Steve
H. Kanzer, C.P.A., Esq., a director of the Company, is a Senior Managing
Director of the Paramount Capital, Inc. ("Paramount"). Paramount Capital Asset
Management, Inc. ("PCAM") is the investment manager and general partner of The
Aries Fund, a Cayman Island Trust, and the Aries Domestic Fund, L.P.,
respectively. Lindsay A. Rosenwald, M.D., the President and sole stockholder of
PCAM, is also the President and sole stockholder of the Paramount. Dr. Rosenwald
is also President and sole stockholder of Paramount Capital Investment LLC, a
merchant banking and venture capital firm specializing in biotechnology
companies ("PCI"). In addition, certain officers, employees and/or associates of
the Paramount and/or its affiliates own securities in the Company's
subsidiaries. In the regular course of its business, PCI identifies, evaluates
and pursues investment opportunities in biomedical and pharmaceutical products,
technologies and companies. Generally, Delaware corporate law requires that any
transactions between the Company and any of its affiliates be on terms that,
when taken as a whole, are substantially as favorable to the Company as those
then reasonably obtainable from a person who is not an affiliate in an
arms-length transaction. Nevertheless, neither such affiliates nor PCI is
obligated pursuant to any agreement or understanding with the Company to make
any additional products or technologies available to the Company, nor can there
be any assurance, and the Company does not expect and purchasers of the
securities offered hereby should not expect, that any biomedical or
pharmaceutical product or technology identified by such affiliates or PCI in the
future will be made available to the Company. In addition, certain of the
current officers and directors of the Company or certain of any officers or
directors of the company hereafter appointed may from time to time serve as
officers or directors of other biopharmaceutical or biotechnology companies.
There can be no assurance that such other companies will not have interests in
conflict with those of the Company.
 
     CONCENTRATION OF OWNERSHIP AND CONTROL. The Company's directors, executive
officers and principal stockholders and certain of their affiliates have the
ability to influence the election of the Company's directors and most other
stockholder actions. In particular, pursuant to the placement agency agreement
relating to the private placement completed in October 1997 (the "Private
Placement"), so long as 50% of the shares sold in the Private Placement
("Placement Shares") remain outstanding and subject contractual rights described
in the subscription agreement between the Company and each signatory thereto
(the "Subscription Agreements"), the Company may not do any of the following
without the Paramount's prior approval: (i) issue or increase the authorized
amount or alter the terms of any securities of the Company senior to, or on
parity with, the Placement Shares with respect to voting, liquidation or
dividends, (ii) alter the Company's charter documents in any manner that would
adversely affect the relative rights, preferences, qualifications, limitations
or restrictions of the Placement Shares or of certain contractual rights
described in the Subscription Agreements, (iii) incur indebtedness in excess of
$1,000,000, (iv) incorporate or acquire any subsidiaries and (v) enter any
transactions with affiliates of the Company. In addition, the Company's Board of
Directors cannot exceed seven persons without the prior written consent of the
Paramount's. These arrangements may discourage or prevent any proposed takeover
of the Company, including transactions in which stockholders might otherwise
receive a premium for their shares over the then current market prices. Such
stockholders
 
                                       11
<PAGE>   13
 
may influence corporate actions, including influencing elections of directors
and significant corporate events. See also, "-- Certain Interlocking
Relationships; Potential Conflicts of Interest."
 
ITEM 2. DESCRIPTION OF PROPERTY.
 
     The Company leases approximately 1,500 square feet in Lake Bluff, Illinois.
This space constitutes the Company's executive offices. This space is leased
through December 31, 1998. The lease provides the Company two options to renew
the lease for one year each. In addition, the Company leases approximately 7,500
square feet in Lake Forest, Illinois. This space constitutes the Company's
research and development facility. This space is leased through December 31,
2000. The lease provides that the Company with an option to renew the lease for
an additional three years. The Company believes that its current leased
facilities will be sufficient to meet the Company's needs for the foreseeable
future and that suitable additional space will be available if and as needed.
 
ITEM 3. LEGAL PROCEEDINGS.
 
     The Company is not a party to any material legal proceedings.
 
ITEM 4. SUBMISSION OF MATTERS TO A VOTE OF SECURITY HOLDERS.
 
     None.
 
                                    PART II
 
ITEM 5. MARKET FOR COMMON EQUITY AND RELATED STOCKHOLDER MATTERS.
 
     Quotations for the Company's Common Stock appear in the "pink sheets"
published by the National Quotations Bureau, Inc. and on the "Bulletin Board" of
the National Association of Securities Dealers, Inc. The following table sets
forth the high and low bid quotations, as provided by the National Quotation
Bureau, Inc., for the Company's Common Stock during the period February 1, 1996
through February 27, 1998. The amounts represent inter-dealer quotations without
adjustment for retail markups, markdowns or commissions and do not represent the
prices of actual transactions. All prices have been adjusted for the
one-for-fifteen reverse stock split effected by the Company on June 11, 1997.
 
<TABLE>
<CAPTION>
                                                HIGH BID       LOW ASK
                                                --------       -------
<S>                           <C>               <C>            <C>
1996........................  1st Quarter       $ 3.150        $ 1.200
                              2nd Quarter       $33.188        $ 2.340
                              3rd Quarter       $23.445        $13.125
                              4th Quarter       $15.000        $ 8.445
1997........................  1st Quarter       $12.188        $ 7.969
                              2nd Quarter       $ 7.200        $ 2.750
                              3rd Quarter       $ 2.938        $ 2.750
                              4th Quarter       $ 6.500        $ 2.938
1998........................  1st Quarter       $ 8.625        $ 6.000
</TABLE>
 
     As of February 27, 1998, the Company had approximately 1,128 stockholders
of record.
 
     In connection with a senior line of credit agreement entered into by the
Company with two of its major stockholders, Aries Domestic Fund, L.P. and The
Aries Fund, on May 19, 1997, the Company granted warrants to purchase an
aggregate of 66,668 shares of Common Stock at an initial exercise price equal
equal to the offering price of the Company's Private Placement (as defined
below), subject to adjustment under certain circumstances. Such warrants are
exercisable from May 19, 1997 until May 19, 2002.
 
     Pursuant to the Private Placement, the Company issued and sold an aggregate
of 8,648,716 shares of Common Stock to certain accredited investors on July 16,
October 10 and October 16, 1997, in consideration
 
                                       12
<PAGE>   14
 
of an aggregate amount of $20,000,000. The net proceeds to the Company, after
deducting commissions and expenses of Paramount, were $17,400,000.
 
     In connection with the Private Placement, the Company issued and sold to
the Placement Agent and/or its designees warrants (the "Placement Warrants") to
purchase up to an aggregate of 864,865 shares of Common Stock and, in connection
with the execution of a financial advisory agreement, dated October 16, 1997,
between the Company and the Placement Agent, the Company issued and sold to the
Placement Agent warrants (the "Advisory Warrants") to purchase up to an
aggregate of 1,297,297 shares of Common Stock. The Placement Warrants and the
Advisory Warrants are exercisable beginning on April 16, 1998 until April 16,
2003, at an exercise price of $2.54375 per share, subject to adjustment under
certain circumstances.
 
ITEM 6. MANAGEMENT'S DISCUSSION AND ANALYSIS OR PLAN OF OPERATIONS.
 
PLAN OF OPERATION
 
     The following "Plan of Operation" provides information which management
believes is relevant to an assessment and understanding of the Company's results
of operation and financial condition. The discussion should be read in
conjunction with the audited consolidated financial statements of the Company
and notes thereto. This report contains certain statements of a forward-looking
nature relating to future events or the future financial performance of the
Company. Investors are cautioned that such statements are only predictions and
that actual events or results may differ materially. In evaluating such
statements, investors should carefully consider the various factors identified
in this report, which could cause actual results to differ materially from those
indicated from such forward-looking statements, including those set forth in
"Business -- Certain Factors that may Effect Future Results, Financial Condition
and the Market Price of Securities."
 
     The Company is a development stage enterprise and expects no significant
revenue from the sale of products in the near future. The Company's proprietary
immunomodulator, ImmTher, has completed some Phase II clinical trials for cancer
with limited response in gross metastatic disease and its immuno-adjuvant,
Theramide, has completed a Phase I clinical trial for cancer. The Company has
initiated new Phase II clinical trials for ImmTher in treating micrometastasis
in pediatric sarcomas with two major cancer centers and new preclinical programs
as an anti-infective agent in immuno-compromised patients. For Theramide, the
Company is completing preclinical data for new Phase I trials as an adjuvant for
a vaccine program.
 
     In January 1998, Endorex formed, with Elan, a joint venture for the
exclusive research, development and commercialization of oral vaccines. The
joint venture will combine novel existing and future delivery systems of the two
companies for the development of vaccines. The joint venture plans to select a
few key vaccines for testing in and further development of the delivery systems
during 1998 and to build a data package which may attract interest from vaccine
companies.
 
     Orasomal has initiated preclinical evaluation of at least one new product
utilizing its proprietary oral delivery system, and plans to expand, during
1998, its oral delivery program for proteins and peptides including insulin and
human growth hormone. Orasomal plans to select products for this program that
are only available in injectable form and for which oral therapy is not
available. Orasomal believes its technology, if effective, will increase patient
compliance and ease of administration of therapy.
 
     On August 1, 1997, WGI signed an exclusive worldwide license agreement with
the WARF, for the development of a new cancer therapy. The new drug, perillyl
alcohol (POH), has completed Phase I human trials sponsored by the National
Cancer Institute (NCI) at several cancer centers. WGI has initiated NCI-
sponsored Phase II trials for breast, prostate and ovarian cancer. The Company
has the option to license another perillyl alcohol analog with WARF and recently
exercised this option. WGI intends to initiate reformulation work of POH during
1998.
 
     On December 31, 1997 and 1996, the Company had cash and cash equivalents of
$15,706,374 and $905,907, respectively, and working capital of $15,212,680 and
$824,821, respectively. On January 21, 1998, in connection with financing the
Elan joint venture, Elan purchased $2 million in common stock for cash.
 
                                       13
<PAGE>   15
 
     The Company's current level of research and development activities requires
the expenditure of approximately $350,000 per month. The Company may be required
to seek additional financing in the future to continue operations during such
period in the event of cost overruns, unanticipated expenses, a determination to
pursue additional research projects, or the failure to receive funds anticipated
from other sources. The Company's actual future capital requirements will depend
on numerous factors, including, but not limited to, costs associated with
technologies and products which it may license from third parties, progress in
its research and development programs, including preclinical and clinical
trials, costs of filing and prosecuting patent applications and, if necessary,
enforcing issued patents or obtaining additional licenses to patents, competing
technological and market developments, the cost and timing of regulatory
approvals, the ability of the Company to establish collaborative relationships,
and the cost of establishing manufacturing, sales and marketing capabilities.
The Company has no current commitment to obtain other additional funds and is
unable to state the amount or potential source of any other additional funds.
 
     Because of the Company's potential long-term capital requirements, it may
undertake additional equity offerings whenever conditions are favorable, even if
it does not have an immediate need for additional capital at that time. There
can be no assurance that the Company will be able to obtain additional funding
when needed, or that such funding, if available, will be obtainable on
reasonable terms. Any such additional funding may result in significant dilution
to existing stockholders. If adequate funds are not available, the Company may
be required to accept unfavorable alternatives, including (i) the delay,
reduction or elimination of research and development programs, capital
expenditures, and marketing and other operating expenses, (ii) arrangements with
collaborative partners that may require the Company to relinquish material
rights to its products that it would not otherwise relinquish, or (iii) a merger
of the Company or a sale of the Company or its assets.
 
     The Company does not intend to significantly increase employees during the
next twelve months, but will recruit some key personnel to accelerate
preclinical development of products. It expects to have 19 employees by
year-end.
 
     The Company uses a number of outside consultants skilled in the area of
government regulatory management, clinical trial management, Good Manufacturing
Practices ("GMP") and business development. The Company also formed a Drug
Delivery Scientific Advisory Board for which it appointed as co-chairman of such
Board, Robert Langer, Ph.D., Professor of Biomedical Engineering of M.I.T. and
Henry Brem, M.D., Director of Neurosurgical Oncology at Johns Hopkins Hospital.
Both individuals are recognized leaders in drug delivery systems. Dr. Langer is
a co-inventor of the Orasome(TM) technology currently under development by
Orasomal and licensed from M.I.T. WGI formed Scientific Advisory Board comprised
of a select group of oncologists to guide the clinical development of the
Company's cancer drugs.
 
YEAR 2000
 
     The Company is aware of the issues associated with the programming code in
existing computer systems as the Year 2000 approaches. The Company utilizes
personal computers, software packages developed by 3rd parties and a service
bureau for payroll. The Company is currently in the process of determining and
coordinating the action necessary to provide uninterrupted, normal operation of
business-critical systems. It is anticipated that the evaluation will be
completed by December 31, 1998, allowing adequate time arranging alternative
software and services, if necessary. Management believes that the Year 2000
problem will not pose significant operational problems and that the total costs
associated with Year 2000 issues will not have a material effect on the
consolidated results of the Company.
 
IMPACT OF NEW ACCOUNTING STANDARDS
 
     On October 1, 1997, the Company adopted Statement of Financial Accounting
Standards (SFAS) No. 128, "Earnings per Share". Earnings per share have been
presented on the Consolidated Statement of Operations in accordance with SFAS
No. 128 for the current and prior periods. As operations resulted in a net loss
for all periods presented, diluted earnings per share are the same as basic
earnings per share due to the antidilutive effect of potential dilutive common
shares.
 
                                       14
<PAGE>   16
 
     In June 1997, the Financial Accounting Standards Board ("FASB") issued SFAS
No. 130 "Reporting Comprehensive Income" and SFAS No. 131 "Disclosures about
Segments of an Enterprise and Related Information". In February 1998, FASB
issued SFAS No. 132 "Employers' Disclosure about Pensions and Other
Postretirement Benefits." The Company does not expect the effect of the adoption
of these pronouncements to have a material effect on results of operations or
financial condition.
 
ITEM 7. FINANCIAL STATEMENTS.
 
     Pursuant to Rule 12b-23, the financial statements set forth on pages F-1,
et seq attached hereto are incorporated herein by reference. The financial
statements attached hereto reflect adjustments relating to accounting for the
fair value of stock warrants issued in connection with certain financial
agreements. These adjustments were not reflected in the Company's results
previously reported in a press release and the Fourth Quarter Report 1997 sent
to stockholders. The impact of these non-cash adjustments increased the net loss
for the year ended December 31, 1997 by $476,046.
 
ITEM 8. CHANGES IN AND DISAGREEMENTS WITH ACCOUNTANTS ON ACCOUNTING AND
        FINANCIAL DISCLOSURE.
 
     From February 1, 1996 to January 20, 1997, the Company did not change
independent public accountants.
 
     The engagement of the Company's former independent public accountants,
Moore Stephens, P.C. ("MS"), ended on January 20, 1997.
 
          (i) MS's report on the financial statements for either of the past two
     fiscal years and any subsequent interim period through the date of such
     dismissal, January 20, 1997, did not contain an adverse opinion or
     disclaimer of opinion and was not modified as to uncertainty, audit scope
     or accounting principles.
 
          (ii) The decision to change accountants was approved by the Board of
     Directors of the Company on January 7, 1997.
 
          (iii) There were no disagreements or reportable events with MS,
     whether or not resolved, on any matter of accounting principles or
     practices, financial statement disclosure, or auditing scope or procedure,
     which, if not resolved to MS's satisfaction, would have caused it to make
     reference to the subject matter of the disagreements in connection with its
     reports.
 
     Coopers & Lybrand L.L.P. ("C&L") was engaged by the Company as its
independent public accountants on January 20, 1997. C&L was not consulted by the
Company with respect to the application of accounting principles to a specific
completed transaction or contemplated transaction, or the type of audit opinion
that might be rendered on the Company's financial statements.
 
                                    PART III
 
ITEM 9. DIRECTORS, EXECUTIVE OFFICERS PROMOTERS AND CONTROL PERSONS; COMPLIANCE
        WITH SECTION 16(A) OF THE EXCHANGE ACT.
 
     The information required by this Item is incorporated by reference from the
Company's definitive proxy statement to be filed with the Commission prior to
120 days after December 31, 1997.
 
ITEM 10. EXECUTIVE COMPENSATION.
 
     The information required by this Item is incorporated by reference from the
Company's definitive proxy statement to be filed with the Commission prior to
120 days after December 31, 1997.
 
ITEM 11. SECURITY OWNERSHIP OF CERTAIN BENEFICIAL OWNERS AND MANAGEMENT.
 
     The information required by this Item is incorporated by reference from the
Company's definitive proxy statement to be filed with the Commission prior to
120 days after December 31, 1997.
 
                                       15
<PAGE>   17
 
ITEM 12. CERTAIN RELATIONSHIPS AND RELATED TRANSACTIONS.
 
     The information required by this Item is incorporated by reference from the
Company's definitive proxy statement to be filed with the Commission prior to
120 days after December 31, 1997.
 
ITEM 13. EXHIBITS AND REPORTS ON FORM 8-K.
 
     (a) The following financial statements are filed as part of this report:
 
<TABLE>
        <S>      <C>
        Financial Statements.
        (1)      Balance Sheet as of December 31, 1997.
        (2)      Statements of Operations for the periods ended December 31,
                 1997 and 1996 and cumulative from February 15, 1985 (date of
                 inception) to December 31, 1997.
        (3)      Statements of Cash Flows for the periods ended December 31,
                 1997 and 1996 and cumulative from February 15, 1985 (date of
                 inception) to December 31, 1997.
        (4)      Statements of Stockholders' Equity for the period from
                 February 15, 1985 (date of inception) to December 31, 1997.
        (5)      Notes to Financial Statements.
        (6)      Independent Accountants' Report.
</TABLE>
 
     (b) Reports on Form 8-K
 
     During the fiscal quarter ended December 31, 1997 the Company did not file
any Current Reports on Form 8-K.
 
     (c) Exhibits:
 
<TABLE>
        <S>         <C>
         3.1        Certificate of Incorporation of Company.(1)
         3.2        Certificate of Ownership and Merger filed March 30, 1987.(1)
         3.3        Certificate of Amendment to Certificate of Incorporation
                    filed September 7, 1989.(2)
         3.4        Certificate of Amendment to Certificate of Incorporation
                    filed November 13, 1990.(3)
         3.5        Certificate of Amendment to Certificate of Incorporation
                    filed May 29, 1991.(3)
         3.6        Certificate of Amendment to Certificate of Incorporation
                    filed February 27, 1992.(3)
         3.7        Certificate of Amendment to Certificate of Incorporation
                    filed February 27, 1992.(3)
         3.8        Certificate of Amendment to Certificate of Incorporation
                    filed June 29, 1993.(7)
         3.9        Certificate of Amendment to Certificate of Incorporation
                    filed April 15, 1996.(7)
         3.10       Certificate of Amendment to Certificate of Incorporation
                    filed June 10, 1997.
         3.11       Series B Preferred Certificate of Designations, Preferences
                    and Rights filed January 21, 1998.
         3.12       By-laws of Company.(1)
         4.1        Specimen Common Stock Certificate.(1)
         4.2        Warrant for the Purchase of 864,865 shares of Common
                    Stock.(8)
         4.3        Warrant for the Purchase of 1,297,297 shares of Common
                    Stock.(8)
         4.4        Warrant for the Purchase of 230,770 shares of Common Stock.
        10.1        Patent License Agreement dated December 16, 1996 between the
                    Company and Massachusetts Institute of Technology.(7)
        10.2        Consultation Agreement dated as of September 1, 1996 between
                    the Company and Kenneth Tempero, Ph.D., M.D.(7)
        10.3        Employment Agreement dated July 25, 1996 between the Company
                    and Michael S. Rosen.(5)
        10.4        Employment Agreement dated December 1, 1996 between the
                    Company and Robert N. Brey.(7)
</TABLE>
 
                                       16
<PAGE>   18
<TABLE>
        <S>         <C>
        10.5        Purchase Agreement dated March 1, 1996 between the Company
                    and Dominion Resources, Inc.(4)
        10.6        Purchase Agreement dated as of June 13, 1996 between the
                    Company, Dominion Resources, Inc., The Aries Fund and The
                    Aries Domestic Fund, L.P.(7)
        10.7        Purchase Agreement dated as of June 26, 1996 between the
                    Company, The Aries Fund and The Aries Domestic Fund, L.P.(7)
        10.8        Incentive Stock Option Plan.(1)
        10.9        Lease dated April 28, 1993 between the Company and Landmark
                    Investors.(7)
        10.10       Office Lease dated September 18, 1996 between the Company
                    and American National Bank & Trust Company of Chicago, as
                    amended.(7)
        10.11       Placement Agency Agreement between the Company and Paramount
                    Capital, Inc. dated July 1, 1997.(8)
        10.12       Side Letter #1 to Placement Agency Agreement.(8)
        10.13       Form of Subscription Agreement for the purchase of Common
                    Stock.(8)
        10.14       Financial Advisory Agreement between the Company and
                    Paramount Capital, Inc. dated October 16, 1997.(8)
        10.15       Lease dated December 19, 1997 between the Company and Howard
                    M. Ruskin.
        10.16+      Joint Development and Operating Agreement, dated as of
                    January 21, 1998, between the Company, Elan Corporation,
                    plc, Orasomal Technologies, Inc. and Endorex Vaccine
                    Delivery Technologies, Inc.
        10.17+      Securities Purchase Agreement, dated as of January 21, 1998,
                    between the Company and Elan International Services, Ltd.
        10.18       Registration Rights Agreement, dated as of January 21, 1998,
                    between the Company and Elan International Services, Ltd.
        10.19+      License Agreement, dated as of January 21, 1998, between the
                    Elan Pharmaceuticals, plc and Endorex Vaccine Delivery
                    Technologies, Inc.
        16          Letter on change in certifying accountants.(6)
        21          Subsidiaries of the Company.
        23.1        Consent of Coopers & Lybrand L.L.P., independent certified
                    public accountants.
        27          Financial Data Schedule
</TABLE>
 
- -------------------------
 +  The Company has applied for Confidential Treatment of portions of this
    exhibit pursuant to Rule 24b-2 under the Securities Act of 1934, as amended.
 
(1) Incorporated by reference to the Company's Registration Statement on Form
    S-1 (File No. 33-13492).
 
(2) Incorporated by reference to the Company's Annual Report on Form 10-K for
    the fiscal year ended January 31, 1989.
 
(3) Incorporated by reference to the Company's Annual Report on Form 10-K for
    the fiscal year ended January 31, 1992.
 
(4) Incorporated by reference to the Company's Annual Report on Form 10-KSB for
    the fiscal year ended January 31, 1996.
 
(5) Incorporated by reference to the Company's Quarterly Report on Form 10-QSB
    for the fiscal quarter ended July 31, 1996.
 
(6) Incorporated by reference to the Company's Report on Form 8-K/A dated
    February 10, 1997.
 
(7) Incorporated by reference to the Company's Annual Report on Form 10-KSB, as
    amended, for the transition period ended December 31, 1996.
 
(8) Incorporated by reference to the Company's Quarterly Report on Form 10-QSB,
    as amended, for the fiscal quarter ended September 30, 1997.
 
                                       17
<PAGE>   19
 
                              ENDOREX CORPORATION
                        (A DEVELOPMENT STAGE ENTERPRISE)
 
                           CONSOLIDATED BALANCE SHEET
 
<TABLE>
<CAPTION>
                                                                DECEMBER 31, 1997
                                                                -----------------
<S>                                                             <C>
ASSETS
Current Assets:
  Cash and cash equivalents.................................      $ 15,706,374
  Prepaid expenses..........................................           135,789
  Deferred costs............................................         1,580,000
                                                                  ------------
     Total current assets...................................        17,422,163
Leasehold improvements and equipment, net of accumulated
  amortization of $932,270..................................            88,914
Deferred costs..............................................         1,251,500
Patent issuance costs, net of accumulated amortization of
  $38,384...................................................           287,590
                                                                  ------------
     TOTAL ASSETS...........................................      $ 19,050,167
                                                                  ============
LIABILITIES AND STOCKHOLDERS' EQUITY
Current Liabilities:
  Accounts payable and accrued expenses.....................      $    629,483
Stockholders' Equity:
  Preferred stock, $.05 par value. Authorized 100,000
     shares; none issued and outstanding
  Common stock, $.001 par value. Authorized 50,000,000
     shares; issued 9,855,283 outstanding 9,736,641.........             9,856
  Additional paid-in capital................................        32,318,584
  (Deficit) accumulated during the development stage........       (13,464,006)
                                                                  ------------
                                                                    18,864,434
                                                                  ------------
  Less: treasury stock, at cost, 118,642 shares.............          (443,750)
                                                                  ------------
     Total stockholders' equity.............................        18,420,684
                                                                  ------------
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY..................      $ 19,050,167
                                                                  ============
</TABLE>
 
   The accompanying notes are an integral part of the consolidated financial
                                  statements.
 
                                       F-1
<PAGE>   20
 
                              ENDOREX CORPORATION
                        (A DEVELOPMENT STAGE ENTERPRISE)
 
                     CONSOLIDATED STATEMENTS OF OPERATIONS
 
<TABLE>
<CAPTION>
                                                                                             CUMULATIVE PERIOD
                                                                      TRANSITION PERIOD      FEBRUARY 15, 1985
                                                   YEAR ENDED        FEBRUARY 1, 1996 TO      (INCEPTION) TO
                                                DECEMBER 31, 1997     DECEMBER 31, 1996      DECEMBER 31, 1997
                                                -----------------    -------------------     -----------------
<S>                                             <C>                  <C>                     <C>
SBIR contract revenue.......................       $        --           $        --           $    100,000
Expenses:
  SBIR contract research and development....                                                         86,168
  Proprietary research and development......         1,826,066             1,136,099              9,869,324
  General and administrative................         1,450,828               871,658              4,422,911
                                                   -----------           -----------           ------------
     Total expenses.........................         3,276,894             2,007,757             14,378,403
                                                   -----------           -----------           ------------
Loss from operations........................        (3,276,894)           (2,007,757)           (14,278,403)
Other income................................                --                    --                  1,512
Interest income.............................           185,642                44,880              1,006,598
Interest expense............................          (153,074)                   --               (193,713)
                                                   -----------           -----------           ------------
Loss before income taxes....................        (3,244,326)           (1,962,877)           (13,464,006)
Income taxes                                                --                    --                     --
                                                   -----------           -----------           ------------
     Net loss...............................       $(3,244,326)          $(1,962,877)          $(13,464,006)
                                                   ===========           ===========           ============
Basic and diluted net loss per share........       $     (1.03)          $     (2.49)          $     (30.95)
Weighted average common shares
  outstanding...............................         3,141,827               787,451                435,034
</TABLE>
 
   The accompanying notes are an integral part of the consolidated financial
                                  statements.
 
                                       F-2
<PAGE>   21
 
                              ENDOREX CORPORATION
                        (A DEVELOPMENT STAGE ENTERPRISE)
 
                 CONSOLIDATED STATEMENT OF STOCKHOLDERS' EQUITY
<TABLE>
<CAPTION>
                                                                        (DEFICIT)
                                                                       ACCUMULATED
                                     COMMON STOCK        ADDITIONAL     DURING THE      TREASURY STOCK
                                 ---------------------     PAID-IN     DEVELOPMENT    -------------------     DEFERRED
                                  SHARES     PAR VALUE     CAPITAL        STAGE       SHARES      COST      COMPENSATION
                                  ------     ---------   ----------    -----------    ------      ----      ------------
<S>                              <C>         <C>         <C>           <C>            <C>       <C>         <C>
Common stock issued for cash in
  February 1985 at $1.50 per
  share........................        667    $    1     $       999   $         --        --   $      --    $      --
Net earnings for the period
  from February 15, 1985 to
  January 31, 1996.............         --        --              --          6,512        --          --           --
                                 ---------    ------     -----------   ------------   -------   ---------    ---------
BALANCE -- JANUARY 31, 1986....        667         1             999          6,512        --          --           --
Common stock issued for cash in
  October 1986 at $750.00 per
  share........................        666         1         499,999             --        --          --           --
Excess of fair market value
  over option Price of
  non-qualified stock option
  granted......................         --        --          13,230             --        --          --           --
Net (loss) for the year........         --        --              --        (34,851)                   --           --
                                 ---------    ------     -----------   ------------   -------   ---------    ---------
BALANCE -- JANUARY 31, 1987....      1,333         2         514,228        (28,339)       --          --           --
Common stock issued in May 1987
  at $750.00 per share for
  legal services performed for
  the company..................          7        --           5,000             --        --          --           --
Net proceeds from initial
  public stock offering in June
  1987 at $6,000.00 per share,
  less issuance costs..........        333        --       1,627,833             --        --          --           --
Non-qualified stock options
  exercised....................         48        --          33,808             --        --          --      (28,188)
Amortization of deferred
  compensation.................         --        --              --             --        --          --        7,425
Excess of fair market value
  over option price of
  non-qualified stock options
  granted......................         --        --          75,063             --        --          --           --
Net (loss) for the year........         --        --              --       (627,652)       --          --           --
                                 ---------    ------     -----------   ------------   -------   ---------    ---------
BALANCE -- JANUARY 31, 1988....      1,721         2       2,255,932       (655,991)       --          --      (20,763)
Non-qualified stock options
  exercised....................         18        --             256             --        --          --           --
Stock warrants exercised.......          1        --          12,000             --        --          --           --
Common stock redeemed and
  retired......................        (10)       --            (150)            --        --          --           --
Excess of fair market value
  over option price of
  non-qualified stock options
  granted......................         --        --          36,524             --        --          --           --
Amortization of deferred
  compensation.................         --        --              --             --        --          --       19,113
Net (loss) for the year........         --        --              --     (1,092,266)       --          --           --
                                 ---------    ------     -----------   ------------   -------   ---------    ---------
BALANCE -- JANUARY 31, 1989 --
  FORWARD......................      1,730         2       2,304,562     (1,748,257)       --          --       (1,650)
 
<CAPTION>
 
                                                 TOTAL
                                    NOTE      STOCKHOLDERS
                                 RECEIVABLE      EQUITY
                                 ----------   ------------
<S>                              <C>          <C>
Common stock issued for cash in
  February 1985 at $1.50 per
  share........................   $     --    $     1,000
Net earnings for the period
  from February 15, 1985 to
  January 31, 1996.............         --          6,512
                                  --------    -----------
BALANCE -- JANUARY 31, 1986....         --          7,512
Common stock issued for cash in
  October 1986 at $750.00 per
  share........................         --        500,000
Excess of fair market value
  over option Price of
  non-qualified stock option
  granted......................         --         13,230
Net (loss) for the year........         --        (34,851)
                                  --------    -----------
BALANCE -- JANUARY 31, 1987....         --        485,891
Common stock issued in May 1987
  at $750.00 per share for
  legal services performed for
  the company..................         --          5,000
Net proceeds from initial
  public stock offering in June
  1987 at $6,000.00 per share,
  less issuance costs..........         --      1,627,833
Non-qualified stock options
  exercised....................         --          5,620
Amortization of deferred
  compensation.................         --          7,425
Excess of fair market value
  over option price of
  non-qualified stock options
  granted......................         --         75,063
Net (loss) for the year........         --       (627,652)
                                  --------    -----------
BALANCE -- JANUARY 31, 1988....         --      1,579,180
Non-qualified stock options
  exercised....................         --            256
Stock warrants exercised.......         --         12,000
Common stock redeemed and
  retired......................         --           (150)
Excess of fair market value
  over option price of
  non-qualified stock options
  granted......................         --         36,524
Amortization of deferred
  compensation.................         --         19,113
Net (loss) for the year........         --     (1,092,266)
                                  --------    -----------
BALANCE -- JANUARY 31, 1989 --
  FORWARD......................         --        554,657
</TABLE>
 
                                       F-3
<PAGE>   22
                              ENDOREX CORPORATION
                        (A DEVELOPMENT STAGE ENTERPRISE)
 
         CONSOLIDATED STATEMENT OF STOCKHOLDERS' EQUITY -- (CONTINUED)
<TABLE>
<CAPTION>
                                                                        (DEFICIT)
                                                                       ACCUMULATED
                                     COMMON STOCK        ADDITIONAL     DURING THE      TREASURY STOCK
                                 ---------------------     PAID-IN     DEVELOPMENT    -------------------     DEFERRED
                                  SHARES     PAR VALUE     CAPITAL        STAGE       SHARES      COST      COMPENSATION
                                  ------     ---------   ----------    -----------    ------      ----      ------------
<S>                              <C>         <C>         <C>           <C>            <C>       <C>         <C>
BALANCE -- JANUARY 31, 1989 --
  FORWARD......................      1,730    $    2     $ 2,304,562   $ (1,748,257)       --   $      --    $  (1,650)
Non-qualified stock options
  exercised....................         71        --           1,060             --        --          --           --
Common stock redeemed and
  retired......................        (12)       --            (175)            --        --          --           --
Excess of fair market value
  over option price of
  non-qualified stock options
  granted......................         --        --         113,037             --        --          --           --
Net proceeds from secondary
  public stock offering in
  April 1989 at $525.00 per
  share, less issuance cost....      2,174         2         980,178             --        --          --           --
Amortization of deferred
  compensation.................         --        --              --             --        --          --        1,650
Net (loss) for the year........         --        --              --     (1,129,477)       --          --           --
                                 ---------    ------     -----------   ------------   -------   ---------    ---------
BALANCE -- JANUARY 31, 1990....      3,963         4       3,398,662     (2,877,734)       --          --           --
Common stock issued for cash in
  October 1990 through January
  1991 at $9.00 per share......      5,694         6          51,244             --        --          --           --
Excess of fair market value
  over option price of
  non-qualified stock options
  granted......................         --        --          30,635             --        --          --           --
Net (loss) for the year........         --        --              --       (854,202)       --          --           --
                                 ---------    ------     -----------   ------------   -------   ---------    ---------
BALANCE -- JANUARY 31, 1991....      9,657        10       3,480,541     (3,731,936)       --          --           --
Common stock issued for cash in
  February 1991 through April
  1991 at $9.00 per share......      2,772         3          24,947             --        --          --           --
Common stock issued for cash
  and services in November 1991
  at $1.50 per share...........     15,333        15          22,985             --        --          --           --
Common stock issued for cash
  and note in December 1991 at
  $0.75 per share..............    296,949       297         200,018             --        --          --           --
Excess of fair market value
  over option price of
  non-qualified stock options
  granted......................         --        --          16,570             --        --          --           --
Non-qualified stock options
  exercised....................          1        --               1             --        --          --           --
Net (loss) for the year........         --        --              --       (410,149)       --          --           --
                                 ---------    ------     -----------   ------------   -------   ---------    ---------
BALANCE -- JANUARY 31, 1992....    324,712       325       3,745,062     (4,142,085)       --          --           --
Payment on note receivable.....         --        --              --             --        --          --           --
Net proceeds from secondary
  public stock offering in
  August 1992 at $112.50 per
  share, less issuance costs...     66,666        66       6,230,985             --        --          --           --
Non-qualified stock options
  exercised....................      2,000         2              28             --        --          --           --
Net (loss) for the year........         --        --              --       (564,173)       --          --           --
                                 ---------    ------     -----------   ------------   -------   ---------    ---------
BALANCE -- JANUARY 31, 1993 --
  FORWARD......................    393,378       393       9,976,075     (4,706,258)       --          --           --
 
<CAPTION>
 
                                                 TOTAL
                                    NOTE      STOCKHOLDERS
                                 RECEIVABLE      EQUITY
                                 ----------   ------------
<S>                              <C>          <C>
BALANCE -- JANUARY 31, 1989 --
  FORWARD......................   $     --    $   554,657
Non-qualified stock options
  exercised....................         --          1,060
Common stock redeemed and
  retired......................         --           (175)
Excess of fair market value
  over option price of
  non-qualified stock options
  granted......................         --        113,037
Net proceeds from secondary
  public stock offering in
  April 1989 at $525.00 per
  share, less issuance cost....         --        980,180
Amortization of deferred
  compensation.................         --          1,650
Net (loss) for the year........         --     (1,129,477)
                                  --------    -----------
BALANCE -- JANUARY 31, 1990....         --        520,932
Common stock issued for cash in
  October 1990 through January
  1991 at $9.00 per share......         --         51,250
Excess of fair market value
  over option price of
  non-qualified stock options
  granted......................         --         30,635
Net (loss) for the year........         --       (854,202)
                                  --------    -----------
BALANCE -- JANUARY 31, 1991....         --       (251,385)
Common stock issued for cash in
  February 1991 through April
  1991 at $9.00 per share......         --         24,950
Common stock issued for cash
  and services in November 1991
  at $1.50 per share...........         --         23,000
Common stock issued for cash
  and note in December 1991 at
  $0.75 per share..............    (50,315)       150,000
Excess of fair market value
  over option price of
  non-qualified stock options
  granted......................         --        16,570\
Non-qualified stock options
  exercised....................         --              1
Net (loss) for the year........         --       (410,149)
                                  --------    -----------
BALANCE -- JANUARY 31, 1992....    (50,315)      (447,013)
Payment on note receivable.....     11,300         11,300
Net proceeds from secondary
  public stock offering in
  August 1992 at $112.50 per
  share, less issuance costs...         --      6,231,051
Non-qualified stock options
  exercised....................         --             30
Net (loss) for the year........         --       (564,173)
                                  --------    -----------
BALANCE -- JANUARY 31, 1993 --
  FORWARD......................    (39,015)     5,231,195
</TABLE>
 
                                       F-4
<PAGE>   23
                              ENDOREX CORPORATION
                        (A DEVELOPMENT STAGE ENTERPRISE)
 
         CONSOLIDATED STATEMENT OF STOCKHOLDERS' EQUITY -- (CONTINUED)
<TABLE>
<CAPTION>
                                                                        (DEFICIT)
                                                                       ACCUMULATED
                                     COMMON STOCK        ADDITIONAL     DURING THE      TREASURY STOCK
                                 ---------------------     PAID-IN     DEVELOPMENT    -------------------     DEFERRED
                                  SHARES     PAR VALUE     CAPITAL        STAGE       SHARES      COST      COMPENSATION
                                  ------     ---------   ----------    -----------    ------      ----      ------------
<S>                              <C>         <C>         <C>           <C>            <C>       <C>         <C>
BALANCE -- JANUARY 31, 1993 --
  FORWARD......................    393,378    $  393     $ 9,976,075   $ (4,706,258)       --   $      --    $      --
Excess of fair market value
  over option price of
  non-qualified stock options
  granted......................         --        --         126,000             --        --          --     (126,000)
Amortization of deferred
  compensation.................         --        --              --             --        --          --       40,750
Non-qualified stock options
  exercised....................         67        --              57             --        --          --           --
Collection of note
  receivable...................         --        --              --             --        --          --           --
Net (loss) for the year........         --        --              --     (1,012,882)       --          --           --
                                 ---------    ------     -----------   ------------   -------   ---------    ---------
BALANCE -- JANUARY 31, 1994....    393,445       393      10,102,132     (5,719,140)       --          --      (85,250)
Acquisition of treasury
  stock........................         --        --              --             --    41,975    (300,000)          --
Forfeiture of non-qualified
  stock options granted........         --        --         (22,402)            --        --          --       22,402
Amortization of deferred
  compensation.................         --        --              --             --        --          --       49,348
Net (loss) for the year........         --        --              --     (1,349,678)       --          --           --
                                 ---------    ------     -----------   ------------   -------   ---------    ---------
BALANCE -- JANUARY 31, 1995....    393,445       393      10,079,730     (7,068,818)   41,975    (300,000)     (13,500)
Acquisition of treasury
  stock........................         --        --              --             --    76,667    (143,750)          --
Forfeiture of non-qualified
  stock options granted........         --        --          (1,379)            --        --          --        1,379
Amortization of deferred
  compensation.................         --        --              --             --        --          --       12,121
Net (loss) for the year........         --        --              --     (1,187,985)       --          --           --
                                 ---------    ------     -----------   ------------   -------   ---------    ---------
BALANCE -- JANUARY 31, 1996....    393,445       393      10,078,351     (8,256,803)  118,642    (443,750)          --
Common stock issued at $0.975
  per share....................    333,333       333         324,667             --        --          --           --
Common stock issued at $3.00
  per share....................    333,333       333         999,667             --        --          --           --
Non-qualified stock options
  exercised....................    145,283       146         379,003             --        --          --           --
Net (loss) for the period......         --        --              --     (1,962,877)       --          --           --
                                 ---------    ------     -----------   ------------   -------   ---------    ---------
BALANCE -- DECEMBER 31, 1996...  1,205,394     1,205      11,781,688    (10,219,680)  118,642    (443,750)          --
Warrants exercised at $1.20 per
  share........................      1,173         1           1,407             --        --          --           --
Proceeds on exercise of stock
  options......................         --        --           5,000             --        --          --           --
Warrants issued................                            5,407,546
Net proceeds from private
  placement at $2.3125 per
  share, less issuance cost....  8,648,718     8,650      15,122,943             --        --          --           --
Net (loss) for the year........         --        --              --     (3,244,326)       --          --           --
                                 ---------    ------     -----------   ------------   -------   ---------    ---------
BALANCE -- DECEMBER 31, 1997...  9,855,285    $9,856     $32,318,584   $(13,464,006)  118,642   $(443,750)   $      --
                                 =========    ======     ===========   ============   =======   =========    =========
 
<CAPTION>
 
                                                 TOTAL
                                    NOTE      STOCKHOLDERS
                                 RECEIVABLE      EQUITY
                                 ----------   ------------
<S>                              <C>          <C>
BALANCE -- JANUARY 31, 1993 --
  FORWARD......................   $(39,015)   $ 5,231,195
Excess of fair market value
  over option price of
  non-qualified stock options
  granted......................         --             --
Amortization of deferred
  compensation.................         --         40,750
Non-qualified stock options
  exercised....................         --             57
Collection of note
  receivable...................     39,015         39,015
Net (loss) for the year........         --     (1,012,882)
                                  --------    -----------
BALANCE -- JANUARY 31, 1994....         --      4,298,135
Acquisition of treasury
  stock........................         --       (300,000)
Forfeiture of non-qualified
  stock options granted........         --             --
Amortization of deferred
  compensation.................         --         49,348
Net (loss) for the year........         --     (1,349,678)
                                  --------    -----------
BALANCE -- JANUARY 31, 1995....         --      2,697,805
Acquisition of treasury
  stock........................         --       (143,750)
Forfeiture of non-qualified
  stock options granted........         --             --
Amortization of deferred
  compensation.................         --         12,121
Net (loss) for the year........         --     (1,187,985)
                                  --------    -----------
BALANCE -- JANUARY 31, 1996....         --      1,378,191
Common stock issued at $0.975
  per share....................         --        325,000
Common stock issued at $3.00
  per share....................         --      1,000,000
Non-qualified stock options
  exercised....................         --        379,149
Net (loss) for the period......         --     (1,962,877)
                                  --------    -----------
BALANCE -- DECEMBER 31, 1996...         --      1,119,463
Warrants exercised at $1.20 per
  share........................         --          1,408
Proceeds on exercise of stock
  options......................         --          5,000
Warrants issued................                 5,407,546
Net proceeds from private
  placement at $2.3125 per
  share, less issuance cost....         --     15,131,593
Net (loss) for the year........         --     (3,244,326)
                                  --------    -----------
BALANCE -- DECEMBER 31, 1997...   $     --    $18,420,684
                                  ========    ===========
</TABLE>
 
                                       F-5
<PAGE>   24
 
                              ENDOREX CORPORATION
                        (A DEVELOPMENT STAGE ENTERPRISE)
 
                     CONSOLIDATED STATEMENTS OF CASH FLOWS
 
<TABLE>
<CAPTION>
                                                                                                          CUMULATIVE PERIOD
                                                                                   TRANSITION PERIOD      FEBRUARY 15, 1985
                                                                 YEAR ENDED         FEBRUARY 1, 1996         (INCEPTION)
                                                              DECEMBER 31, 1997   TO DECEMBER 31, 1996   TO DECEMBER 31, 1997
                                                              -----------------   --------------------   --------------------
<S>                                                           <C>                 <C>                    <C>
OPERATING ACTIVITIES:
  Net (loss)................................................     $(3,244,326)         $(1,962,877)           $(13,464,006)
  Adjustments to Reconcile Net (loss) to Net Cash Used in
    Operating Activities:
    Depreciation and Amortization...........................          71,311              151,293                 981,751
    Amortization of Deferred Compensation...................                                                      131,786
    Excess of Fair Market value over option price on
      Non-Qualified Stock Options...........................                              245,000                 528,680
    Amortization of fair value of warrants..................         476,046                                      476,046
    Gain on Sale of Assets..................................                                                         (740)
    Write off Patent Issuance Cost..........................                                                      101,006
    Changes in Assets and Liabilities:
      Prepaid Expenses......................................         (90,035)              (1,448)               (135,790)
      Accounts Payable and Accrued Expenses.................         502,643               69,357                 719,452
                                                                 -----------          -----------            ------------
         Total Adjustments..................................         959,965              464,202               2,802,191
                                                                 -----------          -----------            ------------
NET CASH USED IN OPERATING ACTIVITIES.......................      (2,284,361)          (1,498,675)            (10,661,815)
                                                                 -----------          -----------            ------------
INVESTING ACTIVITIES:
  Patent Issuance Cost......................................         (94,307)             (39,870)               (427,050)
  Organizational Costs Incurred.............................                                                         (135)
  Deposit on Leasehold Improvements.........................                                                       (5,000)
  Purchases of Leasehold Improvements.......................                                                     (414,671)
  Purchases of Office and Lab Equipment.....................         (58,866)             (36,817)               (612,665)
  Proceeds from Assets Sold.................................                                                        1,000
                                                                 -----------          -----------            ------------
NET CASH USED IN INVESTING ACTIVITIES.......................        (153,173)             (76,687)             (1,458,521)
                                                                 -----------          -----------            ------------
FINANCING ACTIVITIES:
  Net Proceeds from Issuance of Common Stock................     $17,233,001          $ 1,325,000            $ 28,152,877
  Proceeds from Exercise of Options.........................           5,000              134,149                 139,236
  Proceeds from Borrowings from President...................                                                       41,433
  Repayment of Borrowings from President....................                                                      (41,433)
  Proceeds from Borrowings Under Line of Credit.............         362,490                                      662,490
  Repayment of Borrowings Under Line of Credit..............        (362,490)                                    (662,490)
  Proceeds from Note Payable to Bank........................                                                      150,000
  Payments on Note Payable to Bank..........................                                                     (150,000)
  Proceeds from Borrowings from Stockholders................                                                       15,867
  Repayment of Borrowings from Stockholders.................                                                      (15,867)
  Advances from Parent Company..............................                                                      135,000
  Payments to Parent Company................................                                                     (135,000)
  Repayment of Long-Term Note Receivable....................                                                       50,315
  Repayment of Note Payable Issued in Exchange for Legal
    Service.................................................                                                      (71,968)
  Purchase of Treasury Stock................................                                                     (443,750)
                                                                 -----------          -----------            ------------
NET CASH PROVIDED BY FINANCING ACTIVITIES...................      17,238,001            1,459,149              27,826,710
                                                                 -----------          -----------            ------------
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS........      14,800,467             (116,213)             15,706,374
CASH AND CASH EQUIVALENTS -- BEGINNING OF PERIODS...........         905,907            1,022,120
                                                                 -----------          -----------            ------------
CASH AND CASH EQUIVALENTS -- END OF PERIODS.................     $15,706,374          $   905,907            $ 15,706,374
                                                                 ===========          ===========            ============
SUPPLEMENTAL DISCLOSURE OF CASH FLOW:
Cash paid for interest......................................     $     5,529                                 $     46,177
</TABLE>
 
   The accompanying notes are an integral part of the consolidated financial
                                  statements.
 
                                       F-6
<PAGE>   25
 
                              ENDOREX CORPORATION
                        (A DEVELOPMENT STAGE ENTERPRISE)
 
                   NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
 
1. OPERATIONS
 
     BASIS OF PRESENTATION -- Endorex Corp. and Subsidiaries [the "Company"] was
incorporated in January 1987 as ImmunoTherapeutics, Inc, a wholly-owned
subsidiary of Biological Therapeutics, Inc. ["BTI"]. BTI was incorporated on
December 19, 1984 and commenced operations on February 15, 1985 [inception
date]. On March 30, 1987, BTI was merged into the Company. The financial
statements of the Company include the accounts of its predecessor, BTI, for all
periods presented. In October 1996, the Company formed its majority owned
subsidiary, Orasomal Technologies, Inc. ("Orasomal") and in July 1997, the
Company formed another majority owned subsidiary, Wisconsin Genetics, Inc.
("WGI"). On January 31, 1997, the Company changed its fiscal year end from
January 31 to December 31. The accompanying prior period financial statements
reflect the transition period from February 1, 1996 to December 31, 1996.
 
     NATURE OF BUSINESS -- The Company is involved in oral drug delivery and
cancer therapy. Orasomal licensed technology from Massachusetts Institute of
Technology (MIT) that is being developed to deliver vaccines, proteins and
peptides. In 1998, Endorex formed a joint venture with Elan Corporation, plc to
develop oral and mucosal delivery systems for human and animal vaccines. WGI is
starting Phase II clinical trials for novel cancer therapy based on
monoterpenes. Endorex is presently developing two drugs for cancer and
infectious disease: an immunomodulator and an immuno-adjuvant for vaccines.
 
2. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
 
     PRINCIPLES OF CONSOLIDATION -- The consolidated financial statements
include Endorex Corp. and its subsidiaries, Orasomal and WGI. Intercompany
accounts and transactions have been eliminated.
 
     CASH AND CASH EQUIVALENTS -- Cash equivalents are comprised of certain
highly liquid investments with maturity of three months or less when purchased.
 
     OFFICE AND LAB EQUIPMENT AND LEASEHOLD IMPROVEMENTS -- Office, lab
equipment and leasehold improvements are stated at cost. Depreciation is
computed on the straight-line basis over five years. Leasehold improvements are
amortized utilizing the straight-line method over the term of the lease.
 
     RESEARCH AND DEVELOPMENT COSTS -- Expenditures for research and development
activities are charged to operations as incurred.
 
     PATENT ISSUANCE COSTS -- The cost of patents is accumulated during the
approval process. Patents granted are amortized on a straight-line basis over 20
years from the application date or the estimated remaining economic life. When a
patent is not granted or when commercialization of the product or process is no
longer actively pursued, the accumulated cost is charged to operations.
 
     IMPAIRMENT OF LONG-LIVED ASSETS -- In the event that facts and
circumstances indicate that the cost of any long-lived assets may be impaired,
an evaluation of recoverability would be performed. If an evaluation is
required, the estimated future undiscounted cash flows associated with the asset
would be compared to the asset's carrying amount to determine if a write-down to
market value or discounted cash flow is required.
 
     REVERSE STOCK SPLIT -- On June 11, 1997, the Company effected a
one-for-fifteen reverse stock split of its common stock. All share and per share
amounts have been adjusted to reflect such reverse stock split.
 
     INCOME TAXES -- Deferred taxes reflect the future tax consequences
associated with the differences between financial accounting and tax bases of
assets and liabilities.
 
     CONCENTRATIONS OF CREDIT RISK -- Financial instruments that potentially
subject the Company to concentrations of credit risk are limited to cash and
cash equivalents.
 
                                       F-7
<PAGE>   26
                              ENDOREX CORPORATION
                        (A DEVELOPMENT STAGE ENTERPRISE)
 
           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)
 
     RISK AND UNCERTAINTIES -- The Company is subject to risks common to
companies in the biotechnology industry, including, but not limited to,
litigation, product liability, development by the Company or its competitors of
new technological innovations, dependence on key personnel, protection of
proprietary technology, and compliance with FDA regulations.
 
     USE OF ESTIMATES -- The preparation of financial statements in conformity
with generally accepted accounting principles 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 financial statements and the reported amounts of revenues and expenses
during the reporting period. Actual results could differ from those estimates.
 
     NEW ACCOUNTING STANDARDS -- In June 1997, the Financial Accounting
Standards Board ("FASB") issued SFAS No. 130 "Reporting Comprehensive Income"
and SFAS No. 131 "Disclosures about Segments of an Enterprise and Related
Information". In February 1998, FASB issued SFAS No. 132 "Employers' Disclosure
about Pensions and Other Postretirement Benefits." The Company has not
determined the effect of the adoption of these pronouncements.
 
3. DEVELOPMENT STAGE ACTIVITIES AND OPERATIONS
 
     For the period from its incorporation to date, the Company has been a
"development stage enterprise" and the Company's operations have consisted
primarily of financial planning, raising capital, and research and development
activities. The Company has not produced any revenues from product sales since
its inception.
 
4. REVENUE RECOGNITION
 
     In fiscal 1987, the Company was awarded two Phase I Small Business
Innovation and Research ["SBIR"] contracts amounting to $50,000 each. Revenue
related to such contracts has been recorded in the period in which the contract
revenue was earned based upon the terms of the contracts. The U.S. Government
has the right to use the products developed with the above funding for its
internal use only. Expenses directly related to performing research under the
SBIR contracts have been included in SBIR contract research and development
expense in the accompanying statements of operations.
 
5. LEASEHOLD IMPROVEMENTS AND EQUIPMENT
 
     As of December 31, 1997, leasehold improvements and equipment consisted of
the following:
 
<TABLE>
<S>                                                           <C>
Leasehold improvements......................................  $  414,670
Laboratory equipment........................................     521,129
Office equipment............................................      85,385
                                                              ----------
                                                               1,021,184
Accumulated depreciation....................................    (932,270)
                                                              ----------
                                                              $   88,914
                                                              ==========
</TABLE>
 
     Depreciation expense was $63,045 and $127,302 for the periods ended
December 31, 1997 and 1996, respectively.
 
6. LINE OF CREDIT
 
     On May 19, 1997, the Company entered into a senior line of credit agreement
with Aries Fund, a Cayman Island Trust, and the Aries Domestic Fund, L.P., a
Delaware limited partnership ("The Aries Trust" and the "Aries Domestic Fund,
L.P." are collectively referred to as "Aries"), two of its major stockholders,
 
                                       F-8
<PAGE>   27
                              ENDOREX CORPORATION
                        (A DEVELOPMENT STAGE ENTERPRISE)
 
           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)
 
pursuant to which the Company could borrow up to $500,000 (the "Loan"). The Loan
accrued interest at the rate of 12% per annum and was due and payable on August
19, 1997. In partial consideration of the Loan, the Company granted warrants to
purchase an aggregate of 66,668 shares of Common Stock at an initial exercise
price equal to the offering price of the Company's private placement. In
connection with the issuance of these warrants, the Company recognized
additional interest expense and an increase to Additional paid-in capital of
$147,546 based on the fair value of the warrants using the Black-Scholes model.
The exercise price of such warrants and the number of shares of common stock
purchasable thereunder are subject to adjustment in certain circumstances. Such
warrants are exercisable from May 19, 1997 until May 19, 2002. On July 18, 1997,
the Company paid the outstanding principal and interest on the Bridge Loan.
 
7. STOCKHOLDERS' EQUITY
 
     Pursuant to a Private Placement, the Company issued and sold an aggregate
of 8,648,718 shares of Common Stock on July 16, October 10 and October 16, 1997
to certain accredited investors. The aggregate gross proceeds of these issuances
were $20 million and the net proceeds to the Company after deducting commissions
and expenses were $17,233,001.
 
     On June 13, 1996, Dominion Resources, Inc. ("Dominion") entered into an
agreement with Aries, with the Company a party to the agreement, whereby
Dominion sold and Aries purchased an aggregate of 266,667 shares of the
Company's Common Stock at a price of $1.50 per share. The purchase price was
paid from Aries' general funds. As part of the transaction, Dominion transferred
to Aries certain of its rights under the aforementioned March 1, 1996 agreement
including, among others, the right to designate a Director of the Company and
rights to have the shares registered under the Securities Act of 1933, as
amended. Also concurrently with the completion of the transaction, the Company
redeemed its outstanding rights under the Shareholders Rights Agreement dated as
of September 23, 1994. On June 26, 1996, Aries purchased from the Company an
additional 333,333 shares of the Company's Common Stock at a price of $3.00 per
share or an aggregate of $1,000,000. The purchase price was paid from Aries'
general funds. The purchase agreement relating to such shares contains various
representations and warranties concerning the Company and its activities and
also various affirmative and negative covenants. The purchase agreement grants
to Aries the right to have registered under the Securities Act of 1933, as
amended, the shares sold to Aries to enable the public offer and sale of those
shares. The agreement restricts the Company from entering into mergers,
acquisitions, or sales of its assets without the prior approval of Aries.
 
     On March 1, 1996, the Company entered into a Stock Purchase Agreement with
Dominion pursuant to which Dominion agreed to purchase and the Company agreed to
sell 333,333 shares of the Company's Common Stock at a purchase price per share
of $.975 or an aggregate purchase price of $325,000. Such shares were sold in
three approximately equal installments at closings held on March 18, April 15,
and May 15, 1996.
 
     WARRANTS -- In connection with the Private Placement, the Company issued
warrants to purchase 864,865 shares of Common Stock at an exercise price of
$2.54375 per share to Paramount Capital, Inc., the Placement Agent ("Paramount")
and certain of its affiliates and employees. The estimated fair value at grant
date of the warrants was $2.1 million, which has been recorded as a
reclassification of Additional paid-in capital. The Company also executed a
financial advisory agreement with Paramount. In connection with the financial
advisory agreement, the Company issued warrants to purchase 1,297,297 shares of
common stock at an exercise price of $2.54375 per share to certain employees of
Paramount. The estimated fair value at grant date of the warrants was $3.16
million, which has been recorded as Additional paid-in capital. The $3.16
million has been recorded as a deferred cost and is being amortized to expense
over two years, the term of the agreement. The warrants are exercisable after
April 16, 1998 and expire on April 16, 2003.
 
     On June 17, 1991, the Company issued an aggregate 2,345 five-year common
stock purchase warrants at an exercise price of $9.00 per share. In June 1996,
the warrants were extended to June 16, 1997 and the
 
                                       F-9
<PAGE>   28
                              ENDOREX CORPORATION
                        (A DEVELOPMENT STAGE ENTERPRISE)
 
           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)
 
exercise price was adjusted to $1.20 per share. Of these warrants, 1,173 were
exercised during 1997 prior to the expiration of the remaining warrants on June
16, 1997. In connection with the Company's secondary public offering on August
13, 1992, the Company issued 66,667 five-year common stock purchase warrants at
an exercise price of $112.50. 27,530 of these warrants were acquired and retired
by the Company in connection with its acquisition of treasury stock. The
warrants expired on August 13, 1997.
 
     Net [Loss] Per Share -- On October 1, 1997, the Company adopted Statement
of Financial Accounting Standards (SFAS) No. 128, "Earnings per Share". Earnings
per share have been presented on the Consolidated Statement of Operations in
accordance with SFAS No. 128 for the current and prior periods. As operations
resulted in a net loss for all periods presented, diluted earnings per share are
the same as basic earnings per share due to the antidilutive effect of potential
dilutive common shares, including warrants discussed above and stock options
discussed in Note 8. The net [loss] per share is computed by dividing the net
loss by the weighted average number of shares outstanding during the period as
follows:
 
<TABLE>
<CAPTION>
                                                       FOR THE TRANSITION PERIOD
                                                        ENDED DECEMBER 31, 1996
                                               -----------------------------------------
                                                 INCOME          SHARES        PER-SHARE
                                               (NUMERATOR)    (DENOMINATOR)     AMOUNT
                                               -----------    -------------    ---------
<S>                                            <C>            <C>              <C>
Net loss...................................    $(1,962,877)
Less: Preferred Stock Dividends............             --
                                               -----------
BASIC AND DILUTED EPS
Income available to common stockholders....    $(1,962,877)      787,451        $(2.49)
                                               ===========       =======        ======
</TABLE>
 
<TABLE>
<CAPTION>
                                                             FOR THE YEAR
                                                        ENDED DECEMBER 31, 1997
                                               -----------------------------------------
                                                 INCOME          SHARES        PER-SHARE
                                               (NUMERATOR)    (DENOMINATOR)     AMOUNT
                                               -----------    -------------    ---------
<S>                                            <C>            <C>              <C>
Net loss...................................    $(3,244,326)
Less: Preferred Stock Dividends............             --
                                               -----------
BASIC AND DILUTED EPS
Income available to common stockholders....    $(3,244,326)     3,141,827       $(1.03)
                                               ===========      =========       ======
</TABLE>
 
8. STOCK BASED COMPENSATION
 
     On October 21, 1997, the Board of Directors approved the Amended and
Restated 1995 Omnibus Plan (the "Plan"), subject to shareholder approval at the
1998 Annual Meeting. The Plan incorporates the Company's original 1995 Omnibus
Plan, the existing 1994 Non-Employee Stock Option Plan and the Incentive Stock
Option Plan (collectively, the "Predecessor Plans") so that the Plan will serve
as successor to those plans. The Plan also reserved 1,500,000 shares of common
stock available for issuance, subject to shareholder approval at the 1998 Annual
Meeting.
 
     The Plan is intended to promote the interests of the Company, by providing
eligible persons with the opportunity to acquire a proprietary interest, or
otherwise increase their proprietary interest, in the Company as an incentive
for them to remain in the service of the Company. The Plan is divided into four
separate equity programs: (i) the Discretionary Option Grant Program under which
eligible persons may, at the discretion of the Plan Administrator, be granted
options to purchase shares of Common Stock, (ii) the Salary Investment Option
Grant Program under which eligible employees may elect to have a portion of
their base salary invested each year in options to purchase shares of Common
Stock, (iii) the Automatic Option Grant Program under which eligible
non-employee Board members shall automatically receive options at periodic
 
                                      F-10
<PAGE>   29
                              ENDOREX CORPORATION
                        (A DEVELOPMENT STAGE ENTERPRISE)
 
           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)
 
intervals to purchase shares of Common Stock, and (iv) the Director Fee Option
Grant Program under which non-employee Board members may elect to have all or
any portion of their annual retainer fee otherwise payable in cash applied to a
special option grant.
 
     The terms of the options, including vesting periods, are determined by the
Compensation Committee of the Board of Directors in accordance with the Plan.
Options generally vest over four years. No one person participating in the Plan
may receive options and separately exercisable stock appreciation rights for
more than 750,000 shares of Common Stock per calendar year.
 
     The Company has elected the disclosure-only option under Statement of
Financial Accounting Standards ("SFAS") No. 123, "Accounting for Stock-Based
Compensation" and accordingly accounts for stock options per the terms of
Accounting Principles Board Opinion No. 25, "Accounting for Stock Issued to
Employees". Had compensation expense for stock options been determined based
upon the fair value at the grant date accordingly to the terms of SFAS No. 123,
the Company's net loss would have been increased by approximately $3.3 million
or $1.02 per share and $350,000, or $0.44 per share for 1997 and 1996,
respectively. The effects of applying SFAS No. 123 are not likely to be
representative of the effects disclosed in future years because the pro forma
calculations exclude stock options granted before 1995.
 
     The weighted average fair value of options granted with an exercise price
equal to the fair market value of the stock was $2.54 and $0.98 for 1997 and
1996, respectively.
 
     For purposes of estimating the fair value of options according to SFAS 123,
the fair value of each option grant is estimated as of the date of the grant
using the Black-Scholes option-pricing model. The following weighted-average
assumptions were used: dividend yield 0%, volatility of 187% and 167%, expected
life of four (4) years and five (5) years, and risk-free interest rate of 6.0%
and 6.2% for 1997 and 1996, respectively.
 
     Option activity for the periods ended December 31, 1997 and 1996 was as
follows:
 
<TABLE>
<CAPTION>
                                                           EXERCISE PRICE     SHARES
                                                           --------------     ------
<S>                                                        <C>               <C>
Balance at January 31, 1996............................       $ 1.545           43,384
Granted................................................         5.955          213,333
Expired/Cancelled......................................         0.960           (1,807)
Exercised..............................................         0.960         (145,282)
                                                              -------        ---------
Ending Balance at December 31, 1996....................       $11.220          109,627
                                                              -------        ---------
Granted................................................         2.681        1,285,834
Expired/Cancelled......................................        12.369          (95,347)
Exercised..............................................
                                                              -------        ---------
Ending Balance at December 31, 1997....................       $ 2.660        1,300,114
                                                              =======        =========
</TABLE>
 
                                      F-11
<PAGE>   30
                              ENDOREX CORPORATION
                        (A DEVELOPMENT STAGE ENTERPRISE)
 
           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)
 
     The range of exercise prices and weighted average contractual lives as of
December 31, 1997 are as follows:
 
<TABLE>
<CAPTION>
                                                OPTIONS OUTSTANDING                        OPTIONS EXERCISABLE
                                   ---------------------------------------------      -----------------------------
                                                                WEIGHTED AVERAGE                   WEIGHTED AVERAGE
EXERCISE PRICE                      SHARES        TERM           EXERCISE PRICE       SHARES        EXERCISE PRICE
- --------------                      ------        ----          ----------------      ------       ----------------
<S>            <C>                 <C>            <C>           <C>                   <C>          <C>
 $  1.050........................     15,409       6.99 years       $  1.050            8.742          $  1.050
    2.469........................  1,192,500       9.81                2.469          145,000             2.469
    3.750........................      1,524       5.82                3.750            1,524             3.750
    4.750........................     35,000       9.97                4.750               --                --
    5.500........................     20,000       9.97                5.500           10,000             5.500
    5.625........................     35,000       9.92                5.625               --                --
   18.200........................        667       8.61               18.200              667            18.200
  525.000........................         14      11.70              525.000               14           525.000
                                   ---------      -----             --------          -------          --------
                                   1,300,114       9.78 years       $  2.660          165,947          $  2.696
                                   =========      =====             ========          =======          ========
</TABLE>
 
9. INCOME TAXES
 
     At December 31, 1997, the Company had a useable net operating loss
carryforward of approximately $5,224,000 after limitations based on changes in
ownership. If not utilized to offset future taxable income, this carryforward
will expire in years 2007 to 2012. In addition, the Company has research and
development tax credit carryforwards of approximately $322,000 which expire
between 2004 and 2011. Pursuant to SFAS No. 109, the Company has deferred taxes
as of December 31, 1997 consisting of the following:
 
<TABLE>
<S>                                                           <C>
Net operating loss carryforward.............................  $ 1,776,005
Research & development credit carryforward..................      322,156
Depreciation................................................      132,185
                                                              -----------
Gross deferred tax assets...................................    2,230,346
Valuation allowance.........................................   (2,230,346)
                                                              -----------
Net deferred tax assets.....................................  $        --
                                                              ===========
</TABLE>
 
     Due to the uncertainty that the Company will generate income in the future
sufficient to fully or partially utilize these carryovers, a valuation allowance
of $2,230,346 has been established to offset this asset. This represents an
increase of $1,167,346 over the valuation allowance at December 31, 1996.
 
10. LEASES
 
     At December 31, 1997, the Company leased its executive offices and research
facilities under operating leases which provide for annual minimum rent and
additional rent based on increases in operating costs and real estate taxes.
Future minimum lease payments for operating leases are as follows:
 
<TABLE>
<S>                                                           <C>
1998........................................................  $129,611
1999........................................................    82,332
2000........................................................    64,924
</TABLE>
 
     Rent expense totaled $68,814 and $43,288 for the years ended December 31,
1997 and 1996.
 
                                      F-12
<PAGE>   31
                              ENDOREX CORPORATION
                        (A DEVELOPMENT STAGE ENTERPRISE)
 
           NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED)
 
11. SUBSEQUENT EVENT
 
     On December 31, 1997, the Company executed a binding letter of intent with
Elan Corporation, Plc ("Elan"), for the exclusive research, development and
commercialization of oral and mucosal vaccines. The closing of the transactions
contemplated by the letter of intent occurred as of January 21, 1998.
 
     At the time of closing, Endorex issued to Elan International Services, Ltd.
("EIS") (i) 307,692 shares of Endorex common stock at $6.50 per share and a
six-year warrant to purchase an additional 230,777 shares of Endorex common
stock at an exercise price of $10.00 per share for an aggregate purchase price
of $2,000,000. In addition, EIS purchased $8.01 million of Endorex Series B
Convertible Redeemable Preferred Stock, which is convertible into Endorex common
stock at a price of $7.50 per share. The Series B Convertible Preferred Stock
pays an 8% annual in-kind dividend.
 
     The project will be conducted in a joint venture company that is initially
owned 80.1% by Endorex and 19.9% by EIS. The new company has licensed certain
technology from Elan and certain other technology from Orasomal. Endorex has
invested $8.01 million in the joint venture and Elan has invested $1.99 million.
 
     Elan received an initial $10 million license payment from the joint
venture, and may receive future milestones and royalties based on the joint
venture's performance. Since the technology does not yet represent a commercial
product, the joint venture will record an expense in the first quarter of 1998
for the initial license fee paid to Elan. Endorex will consolidate its $8.01
million share of that expense and will simultaneously record Elan's purchase of
$8.01 million of Endorex Series B Convertible Preferred Stock.
 
                                      F-13
<PAGE>   32
 
                       REPORT OF INDEPENDENT ACCOUNTANTS
 
To the Board of Directors and Stockholders of
Endorex Corp.
(A Development Stage Enterprise):
 
     We have audited the accompanying consolidated balance sheet of Endorex
Corp. (the "Company") (a development stage enterprise) as of December 31, 1997
and the related consolidated statements of operations stockholders' equity, and
cash flows for the year then ended, the period from February 1, 1996 through
December 31, 1996 and the period cumulative from inception (February 15, 1985)
to December 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 audit.
 
     We conducted our audit 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 audit provides a reasonable basis for our opinion.
 
     In our opinion, based on our audit, the consolidated financial statements
referred to above present fairly, in all material respects, the financial
position of Endorex Corp. as of December 31, 1997, and the results of its
operations and its cash flows for the year then ended, the period from February
1, 1996 through December 31, 1996 and the period cumulative from inception
(February 15, 1985) to December 31, 1997, in conformity with generally accepted
accounting principles.
 
COOPERS & LYBRAND L.L.P.
 
Chicago, Illinois
March 6, 1998
 
                                      F-14
<PAGE>   33
 
                                   SIGNATURES
 
     Pursuant to the requirements of Section 13 or 15(d) of the Securities Act
of 1934, the Registrant has duly caused this Report to be signed on its behalf
by the undersigned, thereunto duly authorized, in the Village of Lake Bluff,
State of Illinois, on March 25, 1998.
 
                                          ENDOREX CORP.
 
                                          By:     /s/ MICHAEL S. ROSEN
                                            ------------------------------------
                                                      Michael S. Rosen
                                               President and Chief Executive
                                                    Officer, and Director
 
     Pursuant to the requirements of Section 13 or 15(d) of the Securities Act
of 1934, the Registrant has duly caused this Report to be signed on its behalf
by the undersigned, thereunto duly authorized, in the Village of Lake Bluff,
State of Illinois, on March 25, 1998.
 
<TABLE>
<S>  <C>                                            <C>
By:             /s/ MICHAEL S. ROSEN                President, Chief Executive Officer, and
     -------------------------------------------    Director
                  Michael S. Rosen
 
By:           /s/ DAVID G. FRANCKOWIAK              Vice President, Finance and Administration
     -------------------------------------------    (Principal Financial and Accounting
                David G. Franckowiak                Officer)
 
By:                       *                         Director
     -------------------------------------------
                   Richard Dunning
 
By:                                                 Director
     -------------------------------------------
                   Steve H. Kanzer
 
By:                       *                         Director
     -------------------------------------------
                    Paul D. Rubin
 
By:                       *                         Director
     -------------------------------------------
                  H. Laurence Shaw
 
By:                       *                         Director
     -------------------------------------------
                    Andrew Stein
 
By:                       *                         Director
     -------------------------------------------
                   Steve Thornton
 
By:                       *                         Director
     -------------------------------------------
                   Kenneth Tempero
 
*By:          /s/ DAVID G. FRANCKOWIAK
     -------------------------------------------
                David G. Franckowiak
                  Attorney-in-fact
</TABLE>
 
                                      F-15

<PAGE>   1

                                    

                                                                    EXHIBIT 3.10

                            CERTIFICATE OF AMENDMENT

                                       OF

                          CERTIFICATE OF INCORPORATION

                                       OF

                                  ENDOREX CORP.

                        Pursuant to Sections 228 and 242
                           of the General Corporation
                          Law of the State of Delaware

                           **************************

                  Endorex Corp., a corporation organized and existing under and
by virtue of the General Corporation Law of the State of Delaware (the
"Corporation") DOES HEREBY CERTIFY:

                  FIRST: That Article FOURTH, of the Certificate of
Incorporation of the Corporation be amended by replacing the first paragraph
thereof with the following paragraph:
                  
                       Each one (1) share of the Corporation's Common Stock, par
                  value $.001 per share, issued and outstanding immediately
                  prior to 9:00 A.M. on June 11, 1997 shall be converted and
                  reclassified automatically effective as of June 11, 1997 at
                  9:00 A.M., Delaware time, into one-fifteenth (1/15) share of
                  the Corporation's Common Stock, par value $.001 per share, so
                  that each share of the Corporation's Common Stock issued and
                  outstanding is hereby converted and reclassified. No
                  fractional interests resulting from such conversion shall be
                  issued but, in lieu thereof, the Corporation will round the
                  number of shares of the Corporation's Common Stock issuable to
                  each holder up to the nearest whole share of Common Stock.

                  SECOND: That the foregoing amendment was approved by the
holders of the requisite number of shares of said Corporation in accordance with











                                       1
<PAGE>   2

Section 228 of the General Corporation Law of the State of Delaware and has been
duly adopted in accordance with the provisions of Section 242 of the General
Corporation Law of the State of Delaware.

                  IN WITNESS WHEREOF, said Corporation has caused this
certificate to be signed by Michael S. Rosen, President and Chief Executive
Officer, and its Secretary, this 6 day of June, 1997.


                                         By:    /s/ Michael S. Rosen
                                               ------------------------------
                                               Michael S. Rosen
                                               President and Chief Executive


ATTEST:


 /s/ David Franckowiak
- ------------------------
David Franckowiak
Controller/Treasurer










                                       2

<PAGE>   1
                                                                    EXHIBIT 3.11



             CERTIFICATE OF DESIGNATIONS, PREFERENCES AND RIGHTS OF

                      SERIES B CONVERTIBLE PREFERRED STOCK

                                       OF

                                  ENDOREX CORP.


                  The undersigned officers of Endorex Corp., a corporation
organized and existing under the General Corporation Law of the State of
Delaware (the "Corporation"), do hereby certify that, pursuant to authority
conferred by the Certificate of Incorporation of the Corporation, as amended
(the "Certificate of Incorporation"), and pursuant to the provisions of Section
151 of the General Corporation Law of the State of Delaware, the Board of
Directors of the Corporation adopted a resolution adopting a Certificate of
Designations, Preferences and Rights of Series B Convertible Preferred Stock
(this "Certificate of Designations") providing for certain designations, powers,
number, preferences and relative, participating, optional or other special
rights, and the qualifications, limitations or restrictions thereof, of 200,000
shares of Series B Convertible Preferred Stock, $.05 par value per share, which
resolution is as follows:

         RESOLVED: That pursuant to Article Fourth of the Certificate of
         Incorporation, as amended, of this Corporation, the Board of Directors
         hereby establishes the following series of Preferred Stock, $.05 par
         value per share (the "Preferred Stock"), of the Corporation having the
         designations, powers, number, preferences and relative, participating,
         optional or other special rights, and the qualifications, limitations
         or restrictions thereof set forth below:

                  1. Designation. 200,000 shares of the Preferred Stock shall be
designated and known as the "Series B Convertible Preferred Stock." Such number
of shares may be increased or decreased by resolution of the Board of Directors
after obtaining the consent of a majority in interest of the then outstanding
shares of Series B Convertible Preferred Stock; provided, however, that no
decrease shall reduce the number of shares of Series B Convertible Preferred
Stock to a number less than the number of shares then outstanding plus the
number of shares issuable upon exercise of outstanding rights, options or
warrants or upon conversion of outstanding securities issued by the Corporation.

                  2.       Dividend Provisions.

                           (a) Subject to the prior and superior rights of any
series of Preferred Stock which may from time to time come into existence, the
holders of shares of Series B Convertible Preferred Stock shall be entitled to
receive dividends, out of any assets legally available therefor, prior and in
preference to any declaration or payment of any dividend (payable other than in
Common Stock or other securities and rights convertible solely into or entitling
the



<PAGE>   2


holder thereof to receive, directly or indirectly, additional shares of Common
Stock of the Corporation) on the Common Stock of the Corporation, at the rate of
eight percent (8%) per annum. Such dividends shall be cumulative and accrue
annually on the last day of December (except that if any such date is a
Saturday, Sunday or legal holiday, then such dividend shall be payable on the
next day that is not a Saturday, Sunday or legal holiday), in each year,
commencing on December 31, 1998, for each full year and each portion of a year
that the share entitled to such dividend is outstanding.

                           (b) Such dividends shall be payable in shares (but
not fractional shares) of Series B Convertible Preferred Stock.

                           (c) In addition, when and if the Board of Directors
shall declare a dividend or distribution payable with respect to the then
outstanding shares of Common Stock of the Corporation (other than a dividend
payable solely in shares of Common Stock), the holders of the Series B
Convertible Preferred Stock shall be entitled to the amount of dividends per
share as would be payable on the largest number of whole shares of Common Stock
into which each share of Series B Convertible Preferred Stock could then be
converted pursuant to Section 5 hereof (such number to be determined as of the
record date for the determination of holders of Common Stock entitled to receive
such dividend).

                  3.       Liquidation Preference.

                  (a) In the event of any liquidation, dissolution or winding-up
of the affairs of the Corporation, whether voluntary or involuntary
(collectively, a "Liquidation"), before any payment of cash or distribution of
other property shall be made to the holders of the Common Stock (the "Common
Stockholders") or any other class or series of stock subordinate in Liquidation
Preference to the Series B Convertible Preferred Stock, the Series B Convertible
Preferred Stockholders shall be entitled to receive out of the assets of the
Corporation legally available for distribution to its stockholders, an amount
equal to the sum of (i) the Original Purchase Price per share (as appropriately
adjusted for any combinations or divisions or similar recapitalizations
affecting the Series B Convertible Preferred Stock after issuance) (the "Series
B Liquidation Preference"), out of funds legally available therefor, and (ii) an
amount equal to any declared but unpaid dividends thereon. As used herein, the
"Original Purchase Price" is $100 per share.

                  (b) If, upon any Liquidation, the assets of the Corporation
available for distribution to its stockholders shall be insufficient to pay the
Series B Convertible Preferred Stockholders the full amounts to which they shall
be entitled, the Series B Convertible Preferred Stockholders shall share ratably
in any distribution of assets in proportion to the respective amounts which
would be payable to them in respect of the shares held by them if all amounts
payable to them in respect of such were paid in full pursuant to Section 3(a).

                  (c) After the distributions described in subsection (a) above
have been paid, subject to the rights of other series of Preferred Stock which
may from time to time come into existence, the remaining assets of the
Corporation available for distribution to stockholders shall






                                      -2-
<PAGE>   3



be distributed among the holders of Common Stock pro rata based on the number of
shares of Common Stock held by each.

                  (d) For purposes of this Section 3, a liquidation, dissolution
or winding up of the Corporation shall be deemed to be occasioned by, or to
include, (A) the acquisition of the Corporation by another entity by means of
any transaction or series of related transactions (including, without
limitation, any reorganization, merger or consolidation but, excluding any
merger effected exclusively for the purpose of changing the domicile of the
Corporation), unless the Corporation's stockholders of record as constituted
immediately prior to such acquisition or sale will, immediately after such
acquisition (by virtue of securities issued as consideration for the
Corporation's acquisition) hold at least 50% of the voting power of the
surviving or acquiring entity; or (B) a sale of all or substantially all of the
assets of the Corporation.

                        (i) In any of such events, if the consideration received
by the Corporation is other than cash, its value will be deemed its fair market
value, which shall be valued as follows:

                           (A) Securities not subject to investment letter or
other similar restrictions on free marketability covered by (B) below:

                               (1) If traded on a securities exchange or through
Nasdaq (as defined below), the average of the closing prices of the securities
on such exchange during the thirty (30) day period ending three (3) days prior
to the closing;

                               (2) If actively traded over-the-counter, the
average of the closing bid or sale prices (whichever is applicable) over the
thirty (30) day period ending three (3) days prior to the closing; and

                               (3) If there is no active public market, the fair
market value thereof, as mutually determined by the Corporation and the holders
of at least a majority of the voting power of all then outstanding shares of
Series B Convertible Preferred Stock.

                           (B) The method of valuation of securities subject to
investment letter or other restrictions on free marketability (other than
restrictions arising solely by virtue of a stockholder's status as an affiliate
or former affiliate) shall be to make an appropriate discount from the market
value determined as above in (A) (1), (2) or (3) to reflect the approximate fair
market value thereof, as mutually determined by the Corporation and the holders
of at least a majority of the voting power of all then outstanding shares of
such Preferred Stock.

                        (ii) In the event the requirements of this subsection
3(d) are not complied with, the Corporation shall forthwith either:

                           (A) cause such closing to be postponed until such
time as the requirements of this Section 3 have been complied with; or





                                      -3-
<PAGE>   4

                           (B) cancel such transaction, in which event the
rights, preferences and privileges of the holders of the Series B Convertible
Preferred Stock shall revert to and be the same as such rights, preferences and
privileges existing immediately prior to the date of the first notice referred
to in subsection 3(c)(iii) hereof.

                        (iii) The Corporation shall give each holder of record
of Series B Convertible Preferred Stock written notice of such impending
transaction not later than twenty (20) days prior to the stockholders' meeting
called to approve such transaction, or twenty (20) days prior to the closing of
such transaction, whichever is earlier, and shall also notify such holders in
writing of the final approval of such transaction. The first of such notices
shall describe the material terms and conditions of the impending transaction
and the provisions of this Section 3, and the Corporation shall thereafter give
such holders prompt notice of any material changes. The transaction shall in no
event take place sooner than twenty (20) days after the Corporation has given
the first notice provided for herein or sooner than ten (10) days after the
Corporation has given notice of any material changes provided for herein;
provided, however, that such periods may be shortened upon the written consent
of the holders of Preferred Stock that are entitled to such notice rights or
similar notice rights and that represent at least a majority of the voting power
of all then outstanding shares of such Preferred Stock.

                  4.Redemption.

                        (a) At any time on or after the second anniversary of
the date upon which any shares of Series B Convertible Preferred Stock were
first issued (the "Purchase Date"), the Company may, at its option, redeem the
Series B Convertible Preferred Stock on any date set by the Board of Directors
(the "Redemption Date") by paying an amount in cash equal to the then applicable
Liquidation Preference and accrued and unpaid dividends to the Redemption Date.
The Corporation may exercise such option only if (i) the Common Stock shall be
listed on The Nasdaq National Market System or The Nasdaq SmallCap Market
(collectively, "Nasdaq"), (ii) the Common Stock shall have had an average weekly
sales volume during each of the four full calendar weeks prior to the week
during which the redemption notice is given of at least 100,000 shares, and
(iii) for twenty (20) of any thirty (30) consecutive trading days during the 90
days prior to the Redemption Date, the Closing Price (as defined below) of the
Common Stock exceeds $9.75. The "Closing Price" for each trading day shall be
(i) the closing price if the security is traded on a national securities
exchange, or (ii) if the security is quoted on Nasdaq, the average of the high
bid and low asked prices on such day as reported by the National Association of
Securities Dealers, Inc. through Nasdaq, or (iii) if the National Association of
Securities Dealers, Inc. through Nasdaq shall not have reported any bid and
asked prices for the Common Stock on such day, the average of the bid and asked
prices for such day as furnished by any NYSE member firm selected from time to
time by the Corporation for such purpose.

                        (b) To exercise its redemption right under this
Paragraph 4, the Corporation must, not more than ninety (90) nor less than
forty-five (45) days prior to the Redemption Date (the "Notice Period"), give
notice by first class mail, postage prepaid, to the holders of record of the
Series B Convertible Preferred Stock to be redeemed, addressed to such
stockholders at their last addresses as shown on the stock books of the
Corporation. Each such





                                      -4-
<PAGE>   5



notice of redemption shall specify the Redemption Date; the redemption price;
the place or places for payment or delivery; that payment will be made upon
presentation and surrender of the certificates representing shares of Series B
Convertible Preferred Stock being redeemed; that accrued but unpaid dividends to
the Redemption Date will be paid on the Redemption Date; that the holders of
Series B Convertible Preferred Stock shall be entitled to exercise their
Conversion Rights (as defined below) until the last day of the Notice Period;
and that on and after the Redemption Date, dividends will cease to accrue on
such shares. If a dividend with respect to the Series B Convertible Preferred
Stock has been declared by the Board of Directors of the Corporation and if the
Redemption Date with respect to a redemption of Series B Convertible Preferred
Stock falls after the dividend record date established by the Board of Directors
of the Corporation with respect to such dividend, but prior to the related
dividend payment date, the record holders of the Series B Convertible Preferred
Stock on such record date will be entitled to receive the dividend payable on
the Series B Convertible Preferred Stock, notwithstanding the redemption
thereof.

                           Any notice which is mailed as herein provided shall
be conclusively presumed to have been duly given, whether or not the holder of
the Series B Convertible Preferred Stock receives such notice; and failure to
give such notice by mail, or any defect in such notice, to the holders of any
shares designated for redemption shall not affect the validity of the
proceedings for the redemption of any other shares of Series B Convertible
Preferred Stock. On or after the Redemption Date, as stated in such notice, each
holder of the shares of Series B Convertible Preferred Stock called for
redemption shall surrender the certificate evidencing such shares to the
Corporation at the place designated in such notice and shall thereupon be
entitled to receive payment of the redemption price. If less than all shares
represented by any such surrendered certificate are redeemed, a new certificate
shall be issued representing the unredeemed shares. If on the Redemption Date
the funds necessary for the redemption shall be available therefor and shall
have been irrevocably deposited with the transfer agent for the Series B
Convertible Preferred Stock, then, notwithstanding that the certificates
evidencing any shares of Series B Convertible Preferred Stock so called for
redemption shall not have been surrendered, dividends with respect to the shares
of Series B Convertible Preferred Stock so called for redemption shall cease to
accrue after the Redemption Date, such shares shall no longer be deemed
outstanding, and all rights whatsoever with respect to the shares so called for
redemption (except the right of the holders to receive any Common Stock issuable
and any cash payable, without interest, upon surrender of their certificates
therefor) shall terminate.

                        (c) The Corporation shall not be liable to pay any tax
which may become due or payable in respect of any transfer involved in the issue
and delivery upon redemption of shares of Series B Convertible Preferred Stock
for shares of Common Stock in a name other than that of the record holder of the
shares of the Series B Convertible Preferred Stock being redeemed. In addition,
the Corporation shall not be required to issue or deliver any such shares unless
and until the person or persons requesting the issuance thereof shall have (i)
paid to the Corporation the amount of any such tax, (ii) established to the
satisfaction of the Corporation that such tax has been paid or (iii) agreed in
writing to indemnify the Corporation from and against any liability arising from
a failure to pay or withhold such tax, as well as any interest and penalty
related thereto.





                                      -5-
<PAGE>   6



                  5. Conversion. The holders of the Series B Convertible
Preferred Stock shall have conversion rights as follows (the "Conversion
Rights"):

                  (a) Right to Convert. Each share of Series B Convertible
Preferred Stock shall be convertible, at the option of the holder thereof, at
any time after the date of issuance of such share, at the office of the
Corporation or any transfer agent for such stock, into such number of fully paid
and nonassessable shares of Common Stock as is determined by dividing the Series
B Liquidation Preference by the conversion price applicable to such share (the
"Conversion Price"), determined as hereafter provided, in effect on the date the
certificate is surrendered for conversion. The initial Conversion Price per
share for shares of Series B Convertible Preferred Stock shall be $7.50;
provided, however, that the Conversion Price for the Series B Convertible
Preferred Stock shall be subject to adjustment as set forth in subsection 5(d).

                  (b) Automatic Conversion. Each share of Series B Convertible
Preferred Stock shall automatically be converted into shares of Common Stock at
the Conversion Price at the time in effect for such Series B Convertible
Preferred Stock immediately upon the earlier of (i) at any time following the
five-year anniversary of the date of the filing of this Certificate of
Designations if, at such time, the Corporation and its Common Stock meet the
criteria set forth in the second sentence of Section 4(a) above, and (ii) the
Corporation's sale of its Common Stock in a firm commitment underwritten public
offering pursuant to a registration statement under the Securities Act of 1933,
as amended, the public offering price of which is not less than $7.50 per share
(adjusted to reflect subsequent stock dividends, combinations, splits or
recapitalization) and with aggregate gross proceeds of not less than $10,000,000
(a "Qualified Public Offering").

                  (c) Mechanics of Conversion. Before any holder of Series B
Convertible Preferred Stock shall be entitled to convert the same into shares of
Common Stock, such holder shall surrender the certificate or certificates
therefor, duly endorsed, at the office of the Corporation or of any transfer
agent for the Series B Convertible Preferred Stock, and shall give written
notice to the Corporation at its principal corporate office, of the election to
convert the same and shall state therein the name or names in which the
certificate or certificates for shares of Common Stock are to be issued. The
Corporation shall, as soon as practicable thereafter, issue and deliver at such
office to such holder of Series B Convertible Preferred Stock, or to the nominee
or nominees of such holder, a certificate or certificates for the number of
shares of Common Stock to which such holder shall be entitled as aforesaid. Such
conversion shall be deemed to have been made immediately prior to the close of
business on the date of such surrender of the shares of Series B Convertible
Preferred Stock to be converted, and the person or persons entitled to receive
the shares of Common Stock issuable upon such conversion shall be treated for
all purposes as the record holder or holders of such shares of Common Stock as
of such date. If the conversion is in connection with a Qualified Public
Offering, the conversion may, at the option of any holder tendering Series B
Convertible Preferred Stock for conversion, be conditioned upon the closing with
the underwriters of the sale of securities pursuant to such offering, in which
event the person(s) entitled to receive the Common Stock upon conversion of the
Series B Convertible Preferred Stock shall not be deemed to have converted such
Series B Convertible Preferred Stock until immediately prior to the closing of
such sale of securities.




                                      -6-
<PAGE>   7

                  (d) Conversion Price Adjustments of Preferred Stock for
Certain Dilutive Issuances, Splits and Combinations. The Conversion Price of the
Series B Convertible Preferred Stock shall be subject to adjustment from time to
time as follows:

                        (i) (A) If the Corporation shall issue, after the
Purchase Date, any Additional Stock (as defined below) without consideration or
for a consideration per share less than the greater of (X) the Conversion Price
for such series in effect immediately prior to the issuance of such Additional
Stock and (Y) the Closing Price on such date, the Conversion Price for such
series in effect immediately prior to each such issuance shall forthwith (except
as otherwise provided in this clause (i)) be adjusted to a price equal to a
price determined by multiplying such Conversion Price by a fraction, the
numerator of which shall be the sum of (w) the number of shares of Common Stock
outstanding immediately prior to such issuance (assuming the conversion of all
then outstanding shares of Series B Convertible Preferred Stock and including
shares issued or issuable pursuant to Section 5(d)(ii)(B)) and (x) the number of
shares of Common Stock that the aggregate consideration received by the
Corporation for such issuance would purchase at such Conversion Price; and the
denominator of which shall be the sum of (y) the number of shares of Common
Stock outstanding immediately prior to such issuance (assuming the conversion of
all then outstanding shares of Series B Convertible Preferred Stock and
including shares issued or issuable pursuant to Section 5(d)(ii)(B)) and (z) the
number of shares of such Additional Stock.

                            (B) No adjustment of the Conversion Price for the
Series B Convertible Preferred Stock shall be made in an amount less than one
cent per share, provided that any adjustments which are not required to be made
by reason of this sentence shall be carried forward and shall be either taken
into account in any subsequent adjustment made prior to three (3) years from the
date of the event giving rise to the adjustment being carried forward, or shall
be made at the end of three (3) years from the date of the event giving rise to
the adjustment being carried forward. Except to the limited extent provided for
in subsections (E)(3) and (E)(4), no adjustment of such Conversion Price
pursuant to this subsection 5(d)(i) shall have the effect of increasing the
Conversion Price above the Conversion Price in effect immediately prior to such
adjustment.

                            (C) In the case of the issuance of Common Stock for
cash, the consideration shall be deemed to be the amount of cash paid therefor
before deducting any reasonable discounts, commissions or other expenses
allowed, paid or incurred by the Corporation for any underwriting or otherwise
in connection with the issuance and sale thereof.

                            (D) In the case of the issuance of the Common Stock
for a consideration in whole or in part other than cash, the consideration other
than cash shall be deemed to be the fair value thereof as determined by the
Board of Directors irrespective of any accounting treatment.

                            (E) In the case of the issuance (whether before, on
or after the applicable Purchase Date) of options to purchase or rights to
subscribe for Common Stock,






                                      -7-
<PAGE>   8



securities by their terms convertible into or exchangeable for Common Stock or
options to purchase or rights to subscribe for such convertible or exchangeable
securities, the following provisions shall apply for all purposes of this
subsection 5(d)(i) and subsection 5(d)(ii):

                                      (1) The aggregate maximum number of shares
                  of Common Stock deliverable upon exercise (to the extent then
                  exercisable) of such options to purchase or rights to
                  subscribe for Common Stock shall be deemed to have been issued
                  at the time such options or rights were issued and for a
                  consideration equal to the consideration (determined in the
                  manner provided in subsections 5(d)(i)(C) and (d)(i)(D)), if
                  any, received by the Corporation upon the issuance of such
                  options or rights plus the minimum exercise price provided in
                  such options or rights for the Common Stock covered thereby.

                                      (2) The aggregate maximum number of shares
                  of Common Stock deliverable upon conversion of or in exchange
                  (to the extent then convertible or exchangeable) for any such
                  convertible or exchangeable securities or upon the exercise of
                  options to purchase or rights to subscribe for such
                  convertible or exchangeable securities and subsequent
                  conversion or exchange thereof shall be deemed to have been
                  issued at the time such securities were issued or such options
                  or rights were issued and for a consideration equal to the
                  consideration, if any, received by the Corporation for any
                  such securities and related options or rights (excluding any
                  cash received on account of accrued interest or accrued
                  dividends), plus the minimum additional consideration, if any,
                  to be received by the Corporation upon the conversion or
                  exchange of such securities or the exercise of any related
                  options or rights (the consideration in each case to be
                  determined in the manner provided in subsections 5(d)(i)(C)
                  and (d)(i)(D)).

                                      (3) In the event of any change in the
                  number of shares of Common Stock deliverable or in the
                  consideration payable to the Corporation upon exercise of such
                  options or rights or upon conversion of or in exchange for
                  such convertible or exchangeable securities, including, but
                  not limited to, a change resulting from the antidilution
                  provisions thereof, the Conversion Price of the Series B
                  Convertible Preferred Stock, to the extent in any way affected
                  by or computed using such options, rights or securities, shall
                  be recomputed to reflect such change, but no further
                  adjustment shall be made for the actual issuance of Common
                  Stock or any payment of such consideration upon the exercise
                  of any such options or rights or the conversion or exchange of
                  such securities.

                                      (4) Upon the expiration of any such
                  options or rights, the termination of any such rights to
                  convert or exchange or the expiration of any options or rights
                  related to such convertible or exchangeable securities, the
                  Conversion Price of the Series B Convertible Preferred Stock,
                  to the extent in any way affected by or computed using such
                  options, rights or securities or options or rights related to
                  such securities, shall be recomputed to reflect the issuance
                  of only the number of shares of Common Stock (and convertible
                  or exchangeable






                                      -8-
<PAGE>   9

                  securities which remain in effect) actually issued upon the
                  exercise of such options or rights, upon the conversion or
                  exchange of such securities or upon the exercise of the
                  options or rights related to such securities.

                                      (5) The number of shares of Common Stock
                  deemed issued and the consideration deemed paid therefor
                  pursuant to subsections 5(d)(i)(E)(1) and (2) shall be
                  appropriately adjusted to reflect any change, termination or
                  expiration of the type described in either subsection
                  5(d)(i)(E)(3) or (4).

                     (ii) "Additional Stock" shall mean any shares of Common
Stock issued (or deemed to have been issued pursuant to subsection 5(d)(i)(E))
by the Corporation after the Purchase Date to Affiliates of Endorex or
directors, officers, employees or agents of such Affiliates, other than shares
of Common Stock issuable or issued to employees, consultants or directors of the
Corporation directly or pursuant to a stock option plan or restricted stock plan
approved by the Board of Directors of the Corporation (provided that the sum of
such number of shares of Common Stock issuable or issued pursuant to such stock
option plan or restricted stock plan shall in no event represent more than
fifteen percent (15%) of the authorized number of Common Stock). "Affiliates"
shall mean, with respect to any party, any entity that, directly or indirectly
through one or more intermediaries, controls or is controlled by or is under
common control with such party. For purposes of this definition, "control" means
the power to direct or cause the direction of the management and policies of an
entity, whether through the ownership of voting securities, by contract or
otherwise.

                     (iii) In the event the Corporation should at any time or
from time to time after the Purchase Date fix a record date for the effectuation
of a split or subdivision of the outstanding shares of Common Stock or the
determination of holders of Common Stock entitled to receive a dividend or other
distribution payable in additional shares of Common Stock or other securities or
rights convertible into, or entitling the holder thereof to receive directly or
indirectly, additional shares of Common Stock (hereinafter referred to as
"Common Stock Equivalents") without payment of any consideration by such holder
for the additional shares of Common Stock or the Common Stock Equivalents
(including the additional shares of Common Stock issuable upon conversion or
exercise thereof), then, as of such record date (or the date of such dividend
distribution, split or subdivision if no record date is fixed), the Conversion
Price of the Series B Convertible Preferred Stock shall be appropriately
decreased so that the number of shares of Common Stock issuable on conversion of
each share of such series shall be increased in proportion to such increase of
the aggregate of shares of Common Stock outstanding and those issuable with
respect to such Common Stock Equivalents with the number of shares issuable with
respect to Common Stock Equivalents determined from time to time in the manner
provided for deemed issuances in subsection 5(d)(i)(E).

                     (iv) If the number of shares of Common Stock outstanding at
any time after the Purchase Date is decreased by a combination of the
outstanding shares of Common Stock, then, following the record date of such
combination, the Conversion Price for the Series B Convertible Preferred Stock
shall be appropriately increased so that the number of shares of






                                      -9-
<PAGE>   10

Common Stock issuable on conversion of each share of such series shall be
decreased in proportion to such decrease in outstanding shares.

                  (e) Other Distributions. In the event the Corporation shall
declare a distribution payable in securities of other persons, evidences of
indebtedness issued by the Corporation or other persons, assets (excluding cash
dividends) or options or rights not referred to in subsection 5(d)(iii), then,
in each such case for the purpose of this subsection 5(e), the holders of the
Series B Convertible Preferred Stock shall be entitled to a proportionate share
of any such distribution as though they were the holders of the number of shares
of Common Stock of the Corporation into which their shares of Series B
Convertible Preferred Stock are convertible as of the record date fixed for the
determination of the holders of Common Stock of the Corporation entitled to
receive such distribution.

                  (f) Recapitalizations. If at any time or from time to time
there shall be a recapitalization of the Common Stock (other than a subdivision,
combination or merger or sale of assets transaction provided for elsewhere in
this Section 5 or Section 3) provision shall be made so that the holders of the
Series B Convertible Preferred Stock shall thereafter be entitled to receive
upon conversion of the Series B Convertible Preferred Stock the number of shares
of stock or other securities or property of the Corporation or otherwise, to
which a holder of Common Stock deliverable upon conversion would have been
entitled on such recapitalization. In any such case, appropriate adjustment
shall be made in the application of the provisions of this Section 5 with
respect to the rights of the holders of the Series B Convertible Preferred Stock
after the recapitalization to the end that the provisions of this Section 5
(including adjustment of the Conversion Price then in effect and the number of
shares purchasable upon conversion of the Series B Convertible Preferred Stock)
shall be applicable after that event as nearly equivalent as may be practicable.

                  (g) No Impairment. The Corporation will not, by amendment of
its Certificate of Incorporation or through any reorganization,
recapitalization, transfer of assets, consolidation, merger, dissolution, issue
or sale of securities or any other voluntary action, avoid or seek to avoid the
observance or performance of any of the terms to be observed or performed
hereunder by the Corporation, but will at all times in good faith assist in the
carrying out of all the provisions of this Section 5 and in the taking of all
such action as may be necessary or appropriate in order to protect the
Conversion Rights of the holders of the Series B Convertible Preferred Stock
against impairment.

                  (h) No Fractional Shares and Certificate as to Adjustments.

                      (i) No fractional shares shall be issued upon the
conversion of any share or shares of the Series B Convertible Preferred Stock,
and the number of shares of Common Stock to be issued shall be rounded to the
nearest whole share. Whether or not fractional shares are issuable upon such
conversion shall be determined on the basis of the total number of shares of
Series B Convertible Preferred Stock the holder is at the time converting into
Common Stock and the number of shares of Common Stock issuable upon such
aggregate conversion.






                                      -10-
<PAGE>   11



                      (ii) Upon the occurrence of each adjustment or
readjustment of the Conversion Price of Series B Convertible Preferred Stock
pursuant to this Section 5, the Corporation, at its expense, shall promptly
compute such adjustment or readjustment in accordance with the terms hereof and
prepare and furnish to each holder of Series B Convertible Preferred Stock a
certificate setting forth such adjustment or readjustment and showing in detail
the facts upon which such adjustment or readjustment is based. The Corporation
shall, upon the written request at any time of any holder of Series B
Convertible Preferred Stock, furnish or cause to be furnished to such holder a
like certificate setting forth (A) such adjustment and readjustment, (B) the
Conversion Price for such series of Preferred Stock at the time in effect, and
(C) the number of shares of Common Stock and the amount, if any, of other
property which at the time would be received upon the conversion of a share of
Series B Convertible Preferred Stock.

                      (i) Notices of Record Date. In the event of any taking by
the Corporation of a record of the holders of any class of securities for the
purpose of determining the holders thereof who are entitled to receive any
dividend (other than a cash dividend) or other distribution, any right to
subscribe for, purchase or otherwise acquire any shares of stock of any class or
any other securities or property, or to receive any other right, the Corporation
shall mail to each holder of Series B Convertible Preferred Stock, at least 20
days prior to the date specified therein, a notice specifying the date on which
any such record is to be taken for the purpose of such dividend, distribution or
right, and the amount and character of such dividend, distribution or right.

                      (j) Reservation of Stock Issuable Upon Conversion. The
Corporation shall at all times reserve and keep available out of its authorized
but unissued shares of Common Stock, solely for the purpose of effecting the
conversion of the shares of the Series B Convertible Preferred Stock, such
number of its shares of Common Stock as shall from time to time be sufficient to
effect the conversion of all outstanding shares of the Series B Convertible
Preferred Stock; and if at any time the number of authorized but unissued shares
of Common Stock shall not be sufficient to effect the conversion of all then
outstanding shares of the Series B Convertible Preferred Stock, in addition to
such other remedies as shall be available to the holder of such Preferred Stock,
the Corporation will take such corporate action as may, in the opinion of its
counsel, be necessary to increase its authorized but unissued shares of Common
Stock to such number of shares as shall be sufficient for such purposes,
including, without limitation, engaging in best efforts to obtain the requisite
stockholder approval of any necessary amendment to the Certificate of
Incorporation, as amended.

                      (k) Notices. Any notice required by the provisions of this
Section 5 to be given to the holders of shares of Series B Convertible Preferred
Stock shall be deemed given on the date of service if served personally on the
party to whom notice is to be given or on the date of transmittal of services
via telecopy to the party to whom notice is to be given and addressed to each
holder of record at his address appearing on the books of the Corporation.





                                      -11-
<PAGE>   12

                  6. Voting Rights.

                     (a) The holder of each share of Preferred Stock shall have
the right to one vote for each share of Common Stock into which such share of
Preferred Stock could then be converted, and with respect to such vote, such
holder shall have full voting rights and powers equal to the voting rights and
powers of the holders of Common Stock, and shall be entitled, notwithstanding
any provision hereof, to notice of any stockholders' meeting in accordance with
the bylaws of the Corporation, and shall be entitled to vote, together with
holders of Common Stock, with respect to any question upon which holders of
Common Stock have the right to vote, except as greater rights are provided by
law. Fractional votes shall not, however, be permitted and any fractional voting
rights available on an as-converted basis (after aggregating all shares into
which shares of Preferred Stock held by each holder could be converted) shall be
rounded to the nearest whole number (with one-half being rounded upward).

                     (b) In any vote by the holders of the Series B Convertible
Preferred Stock acting as a class, each holder of Series B Convertible Preferred
Stock shall be entitled to one (1) vote for each share of Series B Convertible
Preferred Stock.

                  7. Protective Provisions. Subject to the rights of any series
of Preferred Stock which may from time to time come into existence, so long as
any shares of Series B Convertible Preferred Stock are outstanding, the
Corporation shall not without first obtaining the approval (by vote or written
consent, as provided by law) of the holders of at least a majority of the then
outstanding shares of Series B Convertible Preferred Stock, voting separately as
two series:

                     (i)        increase or decrease the authorized or
                                outstanding number of the shares of Series B
                                Convertible Preferred Stock, respectively, so as
                                to affect adversely the shares; or

                     (ii)       authorize or issue any other equity security, or
                                security convertible into or exercisable for any
                                equity security, having a preference over, or
                                being on a parity with, the Series B Convertible
                                Preferred Stock with respect to voting,
                                dividends, liquidation or redemption,
                                respectively.

                  8. Status of Converted or Redeemed Stock. In the event any
shares of Series B Convertible Preferred Stock shall be converted pursuant to
Section 5 hereof, the shares so converted shall be cancelled and shall not be
reissuable by the Corporation. The Certificate of Incorporation, as amended, of
the Corporation shall be appropriately amended to effect the corresponding
reduction in the Corporation's authorized capital stock.






                                      -12-
<PAGE>   13


                  IN WITNESS WHEREOF, the Corporation has caused this
Certificate of Designations, Preferences and Rights to be duly executed by its
President and attested to by its Secretary this 21st day of January, 1998.

                                  ENDOREX CORP.



                                  By: /s/ Michael S. Rosen
                                     -----------------------------------
                                      Michael S. Rosen, President


ATTEST:


 /s/ David Franckowiak
- -------------------------------
David Franckowiak, Secretary




































                                      -13-

<PAGE>   1


                                                                     EXHIBIT 4.4

NEITHER THIS WARRANT NOR THE SHARES OF COMMON STOCK ISSUABLE UPON EXERCISE
HEREOF HAVE BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED, OR ANY
APPLICABLE STATE SECURITIES LAWS. NO SALE, TRANSFER OR OTHER DISPOSITION OF THIS
WARRANT OR OF ANY SHARES OF COMMON STOCK ISSUED PURSUANT HERETO MAY BE EFFECTED
WITHOUT (I) AN EFFECTIVE REGISTRATION STATEMENT RELATED THERETO, OR (II) AN
OPINION OF COUNSEL FOR THE HOLDER, REASONABLY SATISFACTORY IN FORM AND CONTENT
TO THE COMPANY, THAT SUCH REGISTRATION IS NOT REQUIRED.

VOID AFTER 5:00 P.M.,                              Warrant to purchase
NEW YORK CITY TIME ON                              230,770 Shares of Common
JANUARY 21, 2004                                   Stock, par value US $.001 per
                                                   share, of Endorex Corp.  
                                                   (subject to adjustment)

                                  ENDOREX CORP.

                   WARRANT TO PURCHASE SHARES OF COMMON STOCK
                           PAR VALUE US$.001 PER SHARE

              ENDOREX CORP., a Delaware corporation (the "Company"), hereby
certifies that ELAN INTERNATIONAL SERVICES, LTD., a Bermuda corporation
("Elan"), or any registered assignee of Elan or holder of all or a portion of
this Warrant (each of Elan and any such assignee or holder being hereinafter
referred to as the "Holder") is entitled, subject to the provisions of this
Warrant, to purchase from the Company, at any time after the date hereof and
before 5:00 p.m. New York City time, on January 21, 2004 (the "Exercise
Period"), the number of duly authorized, validly issued, fully paid and
nonassessable Shares of Common Stock, par value US$.001 per share (the
"Shares"), of the Company set forth above, at an exercise price per share of
US$10.00 (the "Exercise Price"), subject to adjustment as provided herein.

              The number of Shares to be received upon the exercise of this
Warrant and the Exercise Price are subject to adjustment from time to time as
hereinafter as set forth. The Shares deliverable upon such exercise, as adjusted
from time to time, are hereinafter sometimes referred to as the "Warrant
Shares."

     1.       Exercise of Warrant.

               (a) This Warrant may be exercised in whole or in part at any time
or from time to time during the Exercise Period by presentation and surrender
thereof to the Company, at its offices designated in Section 15 hereof, with the
Purchase Form attached hereto duly executed and













<PAGE>   2



accompanied by cash or a certified or official bank check drawn to the order of
"Endorex Corp." in the amount of the Exercise Price multiplied by the number of
Warrant Shares specified in such form. If this Warrant should be exercised in
part only, the Company shall, upon surrender of this Warrant, execute and
deliver a new Warrant, substantially in the form hereof, evidencing the rights
of the Holder thereof to purchase the balance of the Warrant Shares purchasable
hereunder. Upon receipt by the Company during the Exercise Period of this
Warrant and such Purchase Form, in proper form for exercise, together with
proper payment of the Exercise Price, at such office, the Holder shall be deemed
to be the holder of record of the number of Warrant Shares specified in such
form; provided, however, that if the date of such receipt by the Company is a
date on which the stock transfer books of the Company are closed, such person
shall be deemed to have become the record holder of such Warrant Shares on the
next succeeding business day on which the stock transfer books of the Company
are open; and provided, further, that such transfer books, unless otherwise
required by law, shall not be closed at any one time for a period of longer than
five consecutive calendar days. The Company shall pay any and all documentary,
stamp or similar issue or transfer taxes payable in respect of the issue or
delivery or such Warrant Shares. Any new or substitute Warrant issued under this
Section 1 or any other provision of this Warrant shall be dated the date of this
Warrant.

              (b) Each certificate representing any Warrant Shares issued upon
exercise of this Warrant shall be dated the date of exercise and delivered to
the Holder within ten business days and shall be endorsed with a legend in
substantially the following form:

         THE SHARES OF COMMON STOCK REPRESENTED BY THIS CERTIFICATE HAVE NOT
         BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED, OR ANY
         APPLICABLE STATE SECURITIES LAWS. NO SALE, TRANSFER OR OTHER
         DISPOSITION OF SUCH SHARES MAY BE EFFECTED WITHOUT (I) AN EFFECTIVE
         REGISTRATION STATEMENT RELATED THERETO, OR (II) AN OPINION OF COUNSEL
         FOR THE HOLDER, REASONABLY SATISFACTORY IN FORM AND CONTENT TO THE
         COMPANY, THAT SUCH REGISTRATION IS NOT REQUIRED.

              2. Warrant Register. This Warrant shall be registered in a
register (the "Warrant Register") to be maintained by the Company at its offices
set forth in Section 15 hereof in the name of the record Holder set forth above.
The Company deem and treat the registered Holder of this Warrant as the absolute
owner hereof (notwithstanding any notation of ownership or other writing herein
made by anyone), for the purpose of any exercise hereof or any distribution to
the Holder hereof and for all other purposes, and, subject to Section 5(b)
hereof, the Company shall not be affected by any notice to the contrary.

              3. Reservation of Warrant Shares.

              (a) The Company hereby agrees that at all times there shall be
authorized and reserved for issuance and delivery upon exercise of this Warrant
all Shares from time to time issuable upon exercise of this Warrant. All such
Shares shall be duly authorized (including any shareholders'







<PAGE>   3


authorization, if required) and when issued upon such exercise shall be validly
issued, fully paid and nonassessable, free and clear of all liens, security
interests, charges and other encumbrances or restrictions on sale granted by the
Company and free and clear of all preemptive rights granted by the Company.

              (b) Before taking any action that would cause a reduction pursuant
to the provisions hereof of the Exercise Price below the then par value (if any)
of the Shares issuable upon exercise of this Warrant, the Company shall take any
corporate action that may, in the opinion of its counsel, be necessary in order
that the Company may validly and legally issue fully paid and nonassessable
Shares at the Exercise Price as so adjusted.

              4       Transfer of the Warrant and the Warrant Shares.

              (a) Neither this Warrant nor any of the Warrant Shares nor any
interest in either may be offered, sold, assigned, pledged, hypothecated,
encumbered or in any other manner transferred or disposed of, in whole or in
part, except in accordance with Section 5 hereof and in compliance with
applicable United States federal and state securities laws, the securities laws
of other applicable jurisdictions, and the terms and conditions hereof. Except
as provided below, each Warrant shall bear the following legend:

                           NEITHER THIS WARRANT NOR ANY OF THE SECURITIES
                  ISSUABLE HEREUNDER HAS BEEN REGISTERED UNDER THE SECURITIES
                  ACT OF 1933, AS AMENDED, AND NEITHER MAY BE OFFERED, SOLD,
                  TRANSFERRED, ASSIGNED OR HYPOTHECATED, EXCEPT IN COMPLIANCE
                  WITH SAID ACT OR AN EXEMPTION THEREFROM.

Notwithstanding the foregoing, the Holder may require the Company to issue a
Warrant without the legend set forth above in substitution for a legended
Warrant if either (i) the sale, transfer or other disposition of such Warrant is
registered under the Securities Act of 1933, as amended (the "Securities Act"),
and applicable securities laws or (ii) the Holder has received an opinion of
counsel reasonably satisfactory to the Company that such registration is not
required with respect to such Warrant. The provisions of this Section 4 shall be
binding upon all subsequent Holders of this Warrant. No transfer or assignment
of this Warrant may be made except in accordance with the provisions of Section
5 hereof.

              (b) The original offering and sale of this Warrant was intended to
be exempt from registration under the Securities Act by virtue of Section 4(2)
of the Securities Act.

              (c) This Warrant and the Warrant Shares may not be sold,
transferred or otherwise disposed of unless (i) the sale, transfer or other
disposition of this Warrant or the Warrant Shares, as the case may be, are
registered under the Securities Act and applicable securities laws or (ii) in
the opinion of counsel reasonably satisfactory to the Company, an exemption from
the registration



<PAGE>   4



requirements of the Securities Act and such securities laws is available, and in
the absence of an effective registration statement covering such securities or
delivery to the Company of such an opinion, this warrant and the Warrant Shares
must be held indefinitely.

              5.  Exchange, Transfer or Assignment of Warrant.

              (a) This Warrant may be combined with other Warrants that carry
the same rights upon presentation hereof at the offices of the Company, together
with written notice of such requested combination signed by the Holder hereof.

              (b) Subject to the provisions of Section 4 hereof, this Warrant
may be assigned or transferred, at the option of the Holder, upon surrender of
this Warrant to the Company, with the Warrant Assignment Form attached hereto
duly executed, and accompanied by funds sufficient to pay any transfer tax. The
Company shall promptly execute and delivery a new Warrant in the name of the
assignee named in such instrument of assignment, and this warrant shall promptly
be cancelled.

              (c) Any transfer or assignment of this Warrant shall be without
charge (other than the cost of any transfer tax) to the Holder and any new
Warrant issued pursuant to this Section 5 shall be dated the date hereof. The
term "Warrant" as used herein includes any new Warrant issued pursuant to this
Section 5 or Sections 1, 2, 4 or 6 hereof.

              6. Lost, Mutilated or Missing Warrant. Upon receipt by the Company
of evidence reasonably satisfactory to it of the loss, theft, destruction or
mutilation of this Warrant, and (in the case of loss, theft or destruction) of
satisfactory indemnification, and upon surrender and cancellation of this
Warrant, if mutilated, the Company shall authenticate and deliver a new Warrant
of like tenor and date.

              7. Rights of the Holder. This Warrant shall not entitle the Holder
to any rights of a stockholder in the Company, either at law or in equity,
unless and until exercise of this Warrant has occurred. No provisions of this
Warrant, in the absence of affirmative action by the Holder to exercise this
Warrant, and no mere enumeration herein of the rights or privileges of such
Holder, shall give rise to any liability of such Holder for the Exercise Price
or as a stockholder of the Company, whether such liability is asserted by the
Company or by its creditors.

              8. Anti-Dilution Provisions. The Exercise Price and the number of
Warrant Shares that may be purchased upon the exercise hereof shall be subject
to change or adjustment as follows:

              (a) Stock Dividends and Stock Splits. If at any time after the
date hereof (the "Purchase Date") and before 5:00p.m., New York City time, on
the last day of the Exercise Period, (i) the Company shall fix a record date for
the issuance of any stock dividend payable in Shares or other capital stock of
the Company convertible into Shares or (ii) the number of Shares shall have been
increased by a subdivision or split-up of Shares, then, on the record date fixed
for the






<PAGE>   5



determination of holders of Shares entitled to receive such dividend or
immediately after the effective date of such subdivision or split-up, as the
case may be, the number of Warrant Shares to be delivered upon exercise of this
Warrant shall be proportionately increased so that the Holder thereafter shall
be entitled to receive the number of Warrant Shares that the Holder would have
owned immediately following such action had this Warrant been exercised
immediately prior thereto, and the Exercise Price shall be appropriately
decreased.

              (b) Combination of Stock. If at any time after the Purchase Date
and before 5:00 p.m., New York City time, on the last day of the Exercise
Period, the number of Ordinary Shares outstanding shall have been decreased by a
combination of the outstanding Ordinary Shares, then, immediately after the
effective date of such combination, the number of Warrant Shares to be delivered
upon exercise of this Warrant shall be proportionately decreased so that the
Holder thereafter shall be entitled to receive the number of Warrant Shares that
the Holder would have owned immediately prior thereto, and the Exercise Price
shall be appropriately increased.

              (c) Reorganization, etc. If at any time after the Purchase Date
and before 5:00 p.m., New York City time, on the last day of the Exercise
Period, any capital reorganization of the Company, or any reclassification of
the Shares, or any consolidation of the Company with or merger of the Company
with or into any other person or any sale, lease or other transfer of all or
substantially all of the assets of the Company to any other person shall be
effected in such a way that upon consummation of such transaction, the holders
of Shares shall be entitled to receive stock, securities or assets with respect
to or in exchange for Shares, then, upon exercise of this Warrant in accordance
with Section 1 hereof, the Holder shall have the right to receive the kind and
amount of stock, securities or assets receivable upon such reorganization,
reclassification, consolidation, merger or sale, lease or other transfer by a
holder of the number of Shares that the Holder would have been entitled to
receive upon exercise of this Warrant pursuant to Section 1 hereof had this
Warrant been exercised immediately before such reorganization, reclassification,
consolidation, merger or sale, lease or other transfer, subject to adjustments
that shall be as nearly equivalent as may be practicable to the adjustments
provided for in this Section 8.

              (d) Below Market Issuance; Rights Offering. If the Company at any
time, after the Purchase Date and before 5:00 p.m., New York City time, on the
last day of the Exercise Period, shall (i) issue or sell any Shares of Common
Stock at a price per share below the then-current Closing Price on the date of
such issuance or sale, or (ii) issue or sell or fix a record date for the
issuance of rights, options, warrants or convertible or exchangeable securities
to all holders of Shares entitling them to subscribe for or purchase Shares or
securities convertible into Shares, in any such case, at a price per share (or
having a conversion price per share) that, together with the value (if for
consideration other than cash, as determined in good faith by the Board of
Directors of the Company) of any consideration paid for any such rights,
options, warrants, or convertible or changeable securities, is less than the
Closing Price (as hereinafter defined) on the date of such issuance or sale or
on such a record date then, immediately after the date of such issuance or sale,
or on such record date, the number of Warrant Shares to be delivered upon
exercise of this Warrant shall be proportionately increased so that the Holder
thereafter, during the Exercise Period, will be






<PAGE>   6



entitled to receive the number of Warrant Shares determined by multiplying the
number of Warrant Shares the Holder would have been entitled to receive
immediately before the date of such issuance or sale or such record date by a
fraction, the denominator of which will be the number of Shares outstanding on
such date plus the number of Shares that the aggregate offering price of the
total number of Shares so offered for subscription or purchase (or the aggregate
initial conversion or exchange price of the convertible or exchangeable
securities so offered) would purchase at such Closing Price, and the numerator
of which will be the number of Shares outstanding on such date plus the number
of Shares offered for subscription or purchase (or in which the convertible or
exchangeable securities so offered are initially convertible or exchangeable),
and the Exercise Price shall be appropriately adjusted. The time of occurrence
of an event giving rise to an adjustment pursuant to this Section 8(d) shall, in
the case of an issuance or sale, be the date of such issuance or sale. Upon the
expiration of any rights, options, warrants, or convertible or exchangeable
securities, if any thereof shall not have exercised, converted or exchanged, the
Exercise Price and number of Warrant Shares purchasable upon the exercise of
this Warrant shall, upon such expiration, be readjusted and shall thereafter be
such as it would have been had it been originally adjusted (or had the original
adjustment not been required, as the case may be) as if (A) the only Shares so
issued were the Shares, if any, actually issued or sold upon the exercise of
such rights, options or warrants, or conversion or exchange of such rights,
options or warrants, or conversion or exchange of securities and (B) such
Shares, if any, were issued or sold for the consideration actually received by
the Company upon such exercise, conversion or exchange plus the aggregate
consideration, if any, actually received by the Company for the issuance, sale
or grant of all of such rights, options, warrants, or convertible or
exchangeable securities, whether or not exercised, converted or exchanged, as
the case may be; provided, however, that no such readjustment shall have the
effect of increasing the Exercise Price or decreasing the number of Warrant
Shares purchasable upon the exercise of this Warrant by an amount in excess of
the amount of the adjustment initially made in respect of the issuance, sale or
grant of such rights, options, warrants, or convertible or exchangeable
securities.

              (e) Non-Stock Dividends. Except to the extent any distributions by
the Company described in this subsection 8(e) are paid out of retained earnings,
if the Company at any time after the Purchase Date and before 5:00 p.m., New
York City time, on the last day of the Exercise Period, shall distribute to all
holders of Shares cash, debt securities or other assets (including evidences of
indebtedness), the Exercise Price will be adjusted so that immediately following
the date fixed by the Company as the record date in respect of such distribution
it shall equal the price determined by subtracting the fair market value of such
distribution on a per share basis (as determined in good faith by the Board of
Directors of the Company, whose determination shall be conclusive) from the
Exercise Price in effect immediately prior to the close of business on the
record date for the determination of the shareholders entitled to receive such
distribution.

              (f) Purchase of Common Stock by the Company. If the Company at any
time while this Warrant is outstanding shall, directly or indirectly through a
subsidiary or otherwise, purchase, redeem or otherwise acquire any Shares at a
price per share greater than the Closing Price then in effect, then the Exercise
Price upon each such purchase, redemption or acquisition shall be reduced


<PAGE>   7



by an amount equal to the Closing Price less a fraction, the denominator of
which shall be the number of Shares outstanding immediately following such
purchase, redemption or acquisition, and the numerator of which shall be the
Post Transaction Value. For the purposes of this Section 8(f), "Post Transaction
Value" means an amount equal to (i) the product of the number of Shares
outstanding immediately prior to such purchase, redemption or acquisition and
the Closing Price less (ii) the product of the number of Shares purchased,
redeemed or acquired and the aggregate consideration therefor. For the purpose
of this Section 8(f), the Closing Price shall be computed as of the close of
business on the day immediately preceding the date of actual purchase,
redemption or acquisition of such Shares.

              (g) No Adjustments. No adjustment in the number of Warrant Shares
purchasable hereunder in accordance with the provisions of subsection 8(a), (b),
(c), (d), (e) or (f) above need be made unless such adjustment would require an
increase or decrease of at least one percent in the number of Warrant Shares
purchasable upon the exercise of this Warrant; provided, however, that the
amount by which any adjustment is not made by reason of the provisions of this
Section 8 shall be carried forward and taken into account at the time of any
subsequent adjustment in the number of Warrant Shares purchasable hereunder.

              (h) Fractional Warrant Shares. No fractional Warrant Shares or
scrip shall be issued to the Holder in connection with the exercise of this
Warrant. Instead of any fractional Warrant Shares that would otherwise be
issuable to the Holder, the Company shall pay to the Holder a cash adjustment in
respect of such fractional interest in an amount equal to that fractional
interest multiplied by the Closing Price on the date of exercise.

              (i) Definition of Closing Price. For purposes of this Section 8,
the term "Closing Price" means the closing price per Share on the principal
national securities exchange on which the Shares are listed or admitted to
trading or, if not listed or traded on any such exchange, on the National
Association of Securities Dealers Automated Quotation System ("Nasdaq") National
Market System ("Nasdaq National Market"), or if not listed or traded on any such
exchange or system, the average of the last bid and offer price per Share on the
Nasdaq over-the-counter system or, if such quotations are not available, the
fair market value as reasonably determined in good faith by the Board of
Directors of the Company or any committee thereof. At the Holder's request, the
Company will promptly provide to the Holder the basis for such determination,
including all relevant background information and material.

              (j) Treasury Shares. The number of Shares outstanding at any given
time shall not include Shares owned or held by or for the account of the
Company, and the distribution of any such treasury shares shall not cause an
adjustment under this Section 8.


              (k) Adjustment of Exercise Price. Whenever the number of Warrant
Shares purchasable upon the exercise of this Warrant is adjusted as herein
provided, the Exercise Price shall be adjusted by multiplying the Exercise Price
immediately prior to such adjustment by a fraction,


<PAGE>   8



of which the numerator shall be the number of Warrant immediately prior to such
adjustment, and of which the denominator shall be the number of Warrant Shares
so purchasable immediately thereafter.

              (l) Other Actions Affecting Shares. In case at any time or from
time to time the Company shall take any action in respect of its Shares, other
than any action specifically described in this Section 8, unless such action
will not have a material adverse effect upon the rights of the Holder (including
the value of the Warrants), then the number of Warrant Shares receivable upon
exercise of this Warrant, and the Exercise Price thereof, will be adjusted in
such manner as may be equitable in the circumstances.

              9. Notices of Certain Events.

              (a) If at any time after the Purchase Date and before the
expiration of the Exercise Period:

                  i                  the Company authorizes the issuance to all 
                           holders of Shares of rights, options or warrants to
                           subscribe for or purchase Shares or any other
                           subscription rights, options or warrants; or

                  ii.                the  Company  authorizes  the  
                           distributions to all holders of Shares of evidences
                           of indebtedness or assets (other than cash dividends
                           or distributions payable out of retained earnings or
                           stock dividends); or

                  iii.               there shall be any capital  reorganization
                           of the Company or reclassification of the Shares
                           (other than a change in par value of the Shares or an
                           increase in the authorized capital stock of the
                           Company not involving the issuance of any shares
                           thereof) or any consolidation or merger to which the
                           Company is a party (other than a consolidation or
                           merger in which the Company is the continuing
                           corporation and that does not result in any
                           reclassification or change in the Shares outstanding)
                           or a conveyance, lease or transfer of all or
                           substantially all of the properties and assets of the
                           Company (other than the granting of a security
                           interest); or

                  iv.                there shall be any voluntary or  
                           involuntary dissolution, liquidation or winding-up of
                           the Company; or

                  v.                 there shall be any other event that would 
                           result in an adjustment pursuant to Section 8 hereof
                           in the Exercise Price or the number of Warrant Shares
                           that may be purchased upon the exercise hereof; 
the Company shall cause to be mailed or delivered to the Holder, at least 20
days (or 10 days in any case specified in clauses (i) or (ii) above) before the
applicable record or effective date hereinafter specified, a notice stating (A)
the date as of which the holders of Shares of record entitled to receive any
such rights, options, warrants or distributions is to be determined, or (B) the
date on which any







<PAGE>   9


such reorganization, reclassification, consolidation, merger, conveyance,
transfer, dissolution, liquidation or winding-up is expected to become
effective, and the date as of which it is expected that holders of Shares of
record shall be entitled to exchange their Shares for securities or other
property, if any, deliverable upon such reorganization, reclassification,
consolidation, merger, conveyance, transfer dissolution, liquidation or
winding-up.

              (b) The failure to give the notice required by this Section 9 or
any defect therein shall not affect the legality or validity of any
distribution, right, option, warrant, consolidation, merger, conveyance, lease,
transfer, dissolution, liquidation or winding-up or the vote upon any such
action.

              10. Officer's Certificate. Whenever the number of Warrant Shares
that may be purchased upon exercise of this Warrant or the Exercise Price is
adjusted as required by the provisions of this Warrant, the Company shall
forthwith file in the custody of its Secretary or an Assistant Secretary an
officer's certificate showing the adjusted number of Warrant Shares that may be
purchased on exercise of this Warrant and the adjusted Exercise Price,
determined as herein provided, setting forth in reasonable detail the facts
requiring such adjustment and the manner of computing such adjustment. Each such
officer's certificate shall be made available at all reasonable times for
inspection by the Holder. The Company shall, forthwith after each such
adjustment, cause a copy of such certificate to be mailed to the Holder.

              11. Listing of the Warrant Shares. The Warrant Shares, when
registered pursuant to the provisions of the Securities Act or otherwise
tradeable under Rule 144 of the Securities Act, shall be listed or admitted to
trading on either a national securities exchange or the Nasdaq National Market
consistent with the Shares then outstanding at the time of issuance of the
Warrant Shares.

              12. Successors. All the provisions of this Warrant by or for the
benefit of the Company or the Holder shall bind and inure to the benefit of
their respective successors, assignees, heirs and personal representatives.

              13. Headings. The headings of sections of this Warrant have been
inserted for convenience of reference only, are not to be considered a part
hereof and shall in no way modify or restrict any of the terms or provisions
hereof.

              14. Amendments. This Warrant may be amended by the written consent
of the Company and the affirmative vote or the written consent of Holders
holding not less than a majority in interest of the then outstanding warrants
originally issued pursuant to the Securities Purchase Agreement; provided that,
except as expressly provided herein, this Warrant may not be amended without the
consent of the Holder of this Warrant to change (a) the Exercise Price, (b) the
Exercise Period, (c) the number or type of securities to be issued upon the
exercise hereof or (d) the provisions of this Section 14.

              15. Notices. All notices, requests and other communications to
the Company or the Holder hereunder shall be in writing (including telecopy or
similar electronic transmissions), shall


<PAGE>   10



refer specifically to this Warrant and shall be personally delivered or sent by
telecopy or other electronic facsimile transmission, by overnight delivery with
a nationally recognized overnight delivery service or by registered mail or
certified mail, return receipt requested, postage prepaid, in each case to the
respective address specified below (or to such address as may be specified in
writing to the other party hereto):

              (a) If to the Company, to:

                  Endorex Corp.
                  900 North Shore Drive
                  Lake Bluff, Illinois 60044
                  Facsimile: (847) 604-8570
                  Attention: Michael S. Rosen

                  with a copyy to:

                  Brobeck Phleger & Harrison LLP
                  1633 Broadway, 47th Floor
                  New York, New York 10019
                  Telecopier: (212) 586-7878
                  Attention: Richard R. Plumridge, Esq.

              (b) If to the Holder, to the address set forth in the Warrant
Register that shall be maintained by the Company in accordance with Section 3
hereof.

Any notice or communication given in conformity with this Section 15 shall be
deemed to be effective when received by the addressee, if delivered by hand, one
day after deposit with a nationally recognized overnight delivery service and
three days after mailing, if mailed.

              16. Governing Law. This Warrant shall be governed by and construed
in accordance with the laws of the State of New York, without giving effect to
its choice of law principles.







<PAGE>   11


              IN WITNESS WHEREOF, the Company has duly caused this Warrant to be
signed and attested by its duly authorized officer and to be dated as of January
21, 1998.

                                            ENDOREX CORP.


                                            By: /s/ Michael S. Rosen
                                                --------------------------------
                                                Michael S. Rosen
                                                President and Chief Executive 
                                                Officer








<PAGE>   12


                                  EXERCISE FORM

                                                            Dated:____________


              The undersigned hereby irrevocably exercises the attached Warrant
to purchase _____ Shares and (i) herewith makes payment of $__________ in
payment of the Exercise Price thereof on the terms and conditions specified in
the attached Warrant, (ii) surrenders the attached Warrant and all right, title
and interest therein to the Company and (iii) directs that the Warrant Shares
deliverable upon the exercise of such Warrant and any cash payment in respect of
fractional Warrant Shares, if any, and any unexercised portion of this his
Warrant be registered in the name and at the address specified below and
delivered thereto.


Signature:_________________________________

Name:____________________________________
              (Please Print)

Address:__________________________________

City, State and Zip Code:_____________________

Taxpayer Identification or
     Social Security Number:________________

NOTE: THE ABOVE SIGNATURE MUST CORRESPOND WITH THE NAME AS WRITTEN UPON THE FACE
OF THE ATTACHED WARRANT IN EVERY PARTICULAR WITHOUT ALTERATION.








<PAGE>   13


                             WARRANT ASSIGNMENT FORM



              FOR VALUE RECEIVED and in compliance with the provisions of
Sections 4 and 5 of the attached Warrant, ________________ hereby sells, assigns
and transfers to:

Name:____________________________________
              (Please Print)

Address:__________________________________

City, State and Zip Code:_____________________

Taxpayer Identification or
     Social Security Number:________________

its right to purchase up to __________ Shares represented by the attached
Warrant and does hereby irrevocably constitute and appoint __________ attorney
to transfer said warrant on the books of the Company, with full power of
substitution in the premises.


                                                Dated:_____________________


                                                _______________________________
                                                Signature of registered holder



NOTE: THE ABOVE SIGNATURE MUST CORRESPOND WITH THE NAME AS WRITTEN UPON THE FACE
OF THE ATTACHED WARRANT IN EVERY PARTICULAR, WITHOUT ALTERATION.



<PAGE>   1


                                                                Ex. 10.15

                                 LEASE AGREEMENT

<PAGE>   2














LESSOR:                                              Howard M. Ruskin


LESSEE:                                              Endorex Corporation


PREMISES:                                            28101 Ballard Road, Unit F
                                                     Lake Forest, Illinois


DATE OF LEASE:                                       December 19, 1997

























                                      -3-
<PAGE>   3


         THIS LEASE is made this 19th day of December, 1997, between Howard M.
Ruskin (the "Lessor") and Endorex Corporation, a Delaware corporation (the
"Lessee"), whereby Lessee leases premises from Lessor, containing approximately
7,238 square feet, commonly known as 28101 North Ballard Road, Unit F, as
designated on the Building Floor Plan attached hereto as Exhibit "A" (the
"Leased Premises"). The Leased Premises are located in a building containing
approximately 32,040 square feet, commonly known as 28101 North Ballard Road,
Lake Forest, Illinois (the "Building"), which is situated on a parcel of ground
containing approximately 81,172.6 square feet (the "Site"), the vacant portion
of which is improved with parking areas, driveways, and landscaping. Lessee
shall have the right at all times during the term of this Lease to use in common
with other tenants in the Building, the accessways, parking areas, landscaped
areas and other public or common areas located on the Site (the "Common Areas").
Lessor shall maintain the Common Areas in good condition and repair.

         This Lease is for a term of three (3) years and will commence January
1, 1998 (the "Commencement Date") and terminate December 31, 2000, unless sooner
terminated or extended as herein provided (the "Lease Term"). The Term Rental is
payable in consecutive monthly installments (the "Monthly Installments") as
follows:

                                                            Monthly
              Period                                      Installment
              ------                                      -----------         
         1/1/98 - 12/31/98                                 $4,243.00
         1/1/99 - 12/31/99                                 $4,370.00
         1/1/00 - 12/31/00                                 $4,501.00

         Lessee is also obliged to pay to Lessor Lessee's Proportionate Share of
Ownership Taxes in excess of $24,069.30 per year (the "Tax Stop"), Building
Insurance in excess of $4,472.00 per year (the "Insurance Stop"), and Common
Expenses in excess of $8,253.15 per year (the "Maintenance Stop"), all as
hereinafter defined. "Lessee's Proportionate Share," as such phrase is used
herein, is 22.59%.

         The Leased Premises shall be used for drug research and development and
related laboratory and animal facilities and or other lawful purposes incidental
thereto or for any other lawful purpose (the "Specified Use"). Lessee has posted
a security deposit of $8,486.00. "Holdover Rental" shall be one hundred and
twenty-five percent (125%) of the per diem rental in effect for the month of the
Lease Term immediately preceding such holdover. All payments to the Lessor shall
be made payable to the order of Howard M. Ruskin (the "Payee"). Lessee's address
for all notices shall be as set forth in Paragraph G.C. 17 of this Lease.

         The were no brokers involved in the negotiation of this Lease, other
than CB Commercial ("Lessor's Broker"). Lessor shall pay a commission to
Lessor's Broker pursuant to a separate agreement between Lessor and Lessor's
Broker.






                                      -4-
<PAGE>   4

         Lessee shall take possession of the Leased Premises in its current
"as-is" condition.

         If Lessee is not then in default under the Lease and has not assigned
the Lease or subleased all or any portion of the Premises, then Lessee shall
have the option to extend the Term of the Lease for an additional three (3) year
period commencing on January 1, 2001 and ending on December 31, 2003 (the
"Extended Term") by giving written notice of said extension to Lessor not later
than July 1, 2000, time being of the essence. If Lessee exercises its option to
extend the Term of this Lease, then the Lease shall be so extended on the same
terms and conditions then set forth in the Lease except that (i) the Base Rent
during the Extended Term shall be as follows:

           Calendar Period of Term                     Monthly Rent
           -----------------------                     ------------
           01/01/01 - 12/31/01                           $4,636.00
           01/01/02 - 12/31/02                           $4,775.00
           01/01/03 - 12/31/03                           $4,918.00

If Lessee fails to timely exercise its option to extend the Term for the
Extended Term, then the Lease shall expire by its terms on December 31, 2000.


         IN WITNESS WHEREOF, Lessor and Lessee have executed this Lease as of
the day and year first above written, intending hereby to incorporate and
include herein all terms, conditions, and provisions contained herein and in
General Conditions 1 through 21, and Exhibit "A" attached hereto and made a part
hereof as though such General Conditions and Exhibit "A" had been hereinabove
fully set forth.

                  LESSOR:

                           /s/ Howard M. Ruskin
                          -------------------------
                              Howard M. Ruskin

                  LESSEE:

                      Endorex Corporation

                        By: /s/ David G. Franckowick
                           ---------------------------
                      Its:  Controller/Treasurer
                          -------------------------







                                      -5-
<PAGE>   5


                      GENERAL CONDITIONS OF LEASE AGREEMENT

                           LESSEE: ENDOREX CORPORATION
           PREMISES: 28101 BALLARD ROAD, UNIT F, LAKE FOREST, ILLINOIS


G.C. 1     TERM RENTAL.

         1.1 Lessee will pay to HOWARD M. RUSKIN, in lawful money of the United
States or by good check or draft (subject to collection), made payable to the
order of the Lessor, or at such other place and to such other payee as Lessor
may from time to time designate in writing the Term Rental in Monthly
Installments, without setoff, deduction, notice or demand, payable one each in
advance on the first day of each calendar month of the Lease Term. Lessee has
paid the Monthly Installment for the first month of the Term to Lessor,
contemporaneously with the execution of this Lease. All other payments required
hereunder including, without limitation, Ownership Taxes, Building Insurance and
Common Expenses shall be paid by Lessee as elsewhere described herein.

G.C. 2     OWNERSHIP TAXES.

         2.1 A rent adjustment shall be made with respect to each calendar year
of the Term, or portion of each calendar year of the Term, with respect to
Ownership Taxes. Ownership Taxes shall mean all taxes which the Lessor becomes
obligated to pay with respect to a calendar year because of or in connection
with the ownership, leasing and operating of the Building and the Site, together
with any and all legal and appraisal fees incurred by Lessor with respect to the
successful contest of such Ownership Taxes, subject to the following:

         2.1.1 The amount of special taxes or special assessments to be included
in Ownership Taxes shall be limited to the amount of the installment (plus any
interest payable thereon) of such special tax or special assessment required to
be paid during the calendar year, in respect of which Ownership Taxes are being
determined;

         2.1.2 There shall be excluded from Ownership Taxes all Federal Income
Taxes, Federal Excess Profits Taxes, Franchise, Capital Stock and State
Inheritance or Estate Taxes; and

         2.1.3 There shall also be excluded from Ownership Taxes any Tax Stop
provided herein for each calendar year of the Term, prorated, if applicable, for
a portion of the calendar year, which Tax Stop represents Lessor's share of
Ownership Taxes on the Building and the Site in connection with this Lease.




                                      -6-
<PAGE>   6

         2.2 The rent adjustment for Ownership Taxes shall be in an amount equal
to Lessee's Proportionate Share of the Ownership Taxes for the Site for each
calendar year of the Term (or portion thereof, including the calendar years in
which this Lease commences and terminates), calculated and paid as follows:

         2.2.1 Lessor shall deliver to Lessee, upon same being made available to
Lessor by the appropriate taxing authority, a statement of Ownership Taxes for
such calendar year, which statement shall include Lessee's Proportionate Share
thereof and a copy of the underlying invoices or bills supporting such
calculations. On or before thirty (30) days immediately following such
notification, Lessee shall pay Lessor an amount equal to such rent adjustment
for such prior calendar year or portion thereof, plus an amount equal to
one-twelfth (1/12th) of such annual rent adjustment times the number of months
elapsed in the current calendar year to the time of payment, less any estimated
payments made with respect thereto under Paragraph 2.2.2 below;

         2.2.2 For each month of the current calendar year subsequent to such
billing, Lessee shall pay Lessor an amount equal to one-twelfth (1/12th) of
Lessee's Proportionate Share of Ownership Taxes for the prior year as an
estimate against Lessee's Proportionate Share of Ownership Taxes for the current
year. For the first calendar year of the Term hereof, Lessee shall make monthly
estimated payments of Lessee's Proportionate Share of Ownership Taxes in the
amount of one-twelfth (1/12th) of the amount that would have been Lessee's
Proportionate Share of Ownership Taxes for the year prior to the Lease. If such
monthly payments exceed Lessee's Proportionate Share of Ownership Taxes for any
year, Lessor shall refund the difference to Lessee within thirty (30) days after
delivery of Lessor's statement with respect thereto.

         2.3 Notwithstanding the payment of Lessee's Proportionate Share of the
Ownership Taxes for the Site, Lessee shall also be responsible for 100% of the
increase in Ownership Taxes levied or assessed against the Site, which are
solely the result of additional improvements (other than any original
improvements made by Lessor described herein) made to the Leased Premises or the
Site by Lessee which are not attributable to the activity of other lessees of
the Building. Lessor represents that each Lease hereafter executed with respect
to the Building shall impose a similar obligation on other lessees of the
Building. To the extent that the County Assessor's worksheets and other records
disclose the basis for any increased assessments, those documents shall be
utilized by the Lessor and Lessee for the purpose of making such allocation or
reallocation; and

         2.4 Nothing herein shall prohibit Lessee from conducting a contest of
the Ownership Taxes on the Site. Lessee acknowledges that it is the tenant to
only a portion of the Building which is subjected to the tax bill. Lessee shall
not entertain or commence any contest of the taxes on the Site unless and until
it has requested that Lessor do so and Lessor has refused or failed to do so,
and after Lessee has received 




                                      -7-
<PAGE>   7

consent to do so from the other lessees of the Building. If Lessee shall contest
such taxes and the result of such contest shall be an increase in the Ownership
Taxes on the Site, Lessee shall be responsible for 100% of such increase.

G.C. 3     USE.

         3.1 Lessee may use the Leased Premises for the Specified Use, subject
to all applicable laws, ordinances and regulations, and Lessee shall not injure,
overload, deface or otherwise harm Site, Building or the Leased Premises; nor
knowingly permit the emitting of any objectionable noise or odor which
constitutes a nuisance; nor burn any trash or refuse thereon or therein; nor
sell, display, distribute or give away any alcoholic liquors or beverages; nor
make or permit any use of the Leased Premises which is improper or contrary to
any law or ordinance, or which will invalidate or increase coverage cost(s) of
any of Lessor's insurance (including the keeping or storage of any article of
dangerous, inflammable or explosive character) or which would increase the
danger of fire in the Leased Premises or in Building in which the same is
located; nor obstruct or knowingly permit the obstruction of driveways, walks,
parking areas and other Common Areas on Site. Lessor represents and warrants
that, as of the date hereof, and to the actual knowledge of Lessor: (a) there
are no violations of any laws, ordinances or regulations or insurance rating
organizations applicable to the Leased Premises, the Building or the Site which
would materially affect Lessee's use or occupancy of the Leased Premises, and
(b) the Specified Use of the Leased Premises does not violate the conditions of
existing insurance policies maintained by Lessor for the Building.

         3.2 Lessee shall not place any painting or exterior sign, placard, or
other advertising media, banners, pennants, aerials, antennas, projections,
awnings or devices of any kind whatsoever on the Site or on the exterior of the
Building.

         3.3 Lessee shall not store any goods or equipment outside the Leased
Premises without Lessor's consent.

G.C. 4     UTILITY SERVICES.

         4.1 Lessee shall promptly pay for all public utilities rendered or
furnished, and metered to the Leased Premises during the Term of this Lease.

         4.2 Common water service and fire alarm service is provided to serve
the Building systems. Lessor will, on an annual basis, bill Lessee for Lessee's
Proportionate Share of all such bills received by Lessor for water metered to
the Building systems, and Lessee shall pay such bills within thirty (30) days
after receipt thereof, provided such bills are accompanied by supporting
calculations showing Lessee's Proportionate Share thereof. The foregoing
expenses shall constitute a Common Expense.




                                      -8-
<PAGE>   8

         4.3 Lessee shall maintain sufficient heat to the Leased Premises, at
its own cost and expense, to prevent any damage to the Leased Premises from the
elements.

         4.4 Lessor shall not be liable for damages, by abatement of rent or
otherwise, for interruption or failure of, or delay in, furnishing any service
or utility, whether the responsibility of Lessor or of others, when same is
occasioned by causes beyond the reasonable control of Lessor.

G.C. 5     CONDITION AND MAINTENANCE OF SITE, BUILDING AND THE LEASED PREMISES.

         5.1 Intentionally Deleted [No Lessor Improvements to be 
constructed].

         5.2 Maintenance

         5.2.1 Lessee, at its sole cost and expense, agrees to keep the interior
of the Leased Premises, equipment facilities and fixtures therein (including the
heating systems, air conditioning systems, fire protection systems, sprinkler
systems, plumbing fixtures and light fixtures, bulbs and tubes) neat, clean and
in good repair and condition (including all necessary painting and decorating)
and to keep all glass clean and in good condition and to replace any glass which
may be damaged or broken with glass of the same quality;

         5.2.2 Lessor agrees, at the sole cost and expense of Lessee and the
other tenants, to maintain the landscaping on the Site in neat and attractive
condition; to keep the parking areas, walks and driveways adjacent to the Leased
Premises and the roof of the Building free of accumulation of snow;

         5.2.3 Lessor agrees, at the sole cost and expense of Lessee, to keep
Lessee's portion of the Site (including drives, driveways, walks, parking areas,
and sewer and water lines), and its portion of the Building (including the
exterior lighting, security lights and exit lights, bulbs and tubes, the
exterior of the Leased Premises and structural supports and exterior walls and
roof thereof), in good condition, order and repair; and

         5.2.4 Lessee agrees, at its sole cost and expense, to make all repairs,
alterations, additions or replacements to the Leased Premises (including
equipment, facilities or fixtures therein) required by law or ordinance or by
order or regulation of any public authority because of Lessee's use of the
Leased Premises; and to keep the Leased Premises equipped with all safety
appliances required because of Lessee's use and to furnish all licenses and all
safety permits required for any such use, and to comply with the orders and
regulation of all governmental authorities.

         5.3 The cost of all Lessor obligations described in Paragraphs 5.2.2
and 5.2.3 above shall be deemed "Common Expenses". Lessee shall pay to Lessor as
additional 





                                      -9-
<PAGE>   9

rent hereunder, within thirty (30) days after being billed therefor, Lessee's
Proportionate Share of Common Expenses, provided such bills are accompanied by
supporting calculations showing Lessee's Proportionate Share thereof. There
shall be excluded from Common Expenses, the amount of any Maintenance Stop
provided herein for each calendar year of the Term, prorated, if applicable, for
a portion of the calendar year, which Maintenance Stop represents Lessor's share
of Common Expenses in connection with this Lease. Expenses incurred by Lessor
regarding the Building or the Site which are capital in nature shall not be
included in Common Expenses (and Lessee shall have no obligation to pay Lessee's
Proportionate Share thereof) except to the extent the capital expenditure is
incurred after the commencement of the term of this Lease and the cost thereof
is amortized on a straight-line basis over the useful life of the applicable
capital item.

         5.4 During the Term of this Lease, Lessee agrees to employ a contractor
approved by Lessor, such approval not to be unreasonably withheld, conditioned
or delayed, to perform Lessee's obligations for the maintenance of the heating,
cooling and ventilating units in the Leased Premises and a contractor approved
by Lessor, such approval not be unreasonably withheld, conditioned or delayed,
to perform any obligations of Lessee for the maintenance of fire protection
systems within the Premises including the sprinkler system. Such maintenance
shall include at least semi-annual inspections and cleaning of the heating,
cooling and ventilating units and monthly inspections of the fire protection
systems including sprinkler systems, together with such adjustments and
servicing as each such inspection discloses to be required, and, in addition,
all repairs, testing and servicing as shall be necessary or reasonably required
by Lessor. Nothing contained in this section shall be deemed to be a guaranty by
the Lessor, or its agents or beneficiaries, of the performance or responsibility
of any contractor approved by Lessor, as herein provided, and Lessee hereby
waives all claims against Lessor for damages to persons or property sustained by
Lessee or any person claiming through Lessee, resulting from or in any way
concerned with Lessee's employment of a contractor pursuant to the provisions of
this Section unless caused by the negligent acts or omissions of Lessor or its
agents or employees.
         5.5 Lessee shall have the right during the Term of this Lease, to make,
at its sole cost and expense, changes and alterations in or of the Leased
Premises, subject, however (except as otherwise provided herein) to Lessor's
prior written consent (which consent shall not be unreasonably withheld,
conditioned or delayed) and subject in all cases to the following:

         5.5.1 Any change or alterations shall be done in a good and workmanlike
manner, in conformity with plans and specifications approved by Lessor in
advance of the commencement of the work, such approval not to be unreasonably
withheld, conditioned, or delayed, and in compliance with all applicable permits
and authorizations and building and zoning laws, and all other applicable laws,
ordinances, rules, regulations and requirements of all Federal, State and
Municipal governments, departments, commissions, boards and officers, and in
accordance with the orders, 




                                      -10-
<PAGE>   10

rules and regulations of the National Board of Fire Underwriters or any other
body exercising similar functions;

         5.5.2 The costs of any such change or alteration shall be paid, in
cash, or its equivalent, so that the Leased Premises, Building and Site shall at
all times be free of liens for labor and materials supplied or claimed to have
been supplied to the Leased Premises by or on behalf of Lessee;

         5.5.3 Workmen's Compensation Insurance covering all persons employed in
connection with the work and with respect to whom death or bodily injury claims
could be asserted against Lessor its beneficiaries, as well as Lessee or the
Leased Premises, shall be maintained by Lessee or its contractor at Lessee's
sole cost and expense at all times when any work is in process in connection
with any change or alteration. Such insurance shall be in a company or companies
rated A+ or better by Best Rating, licensed to do business in Illinois, and all
certificates for such insurance issued by the respective insurers bearing
notations evidencing the payment of premiums or accompanied by other evidence
reasonably satisfactory to Lessor of such payment, shall be delivered to Lessor;
and

         5.5.4 Notwithstanding anything to the contrary contained in this
Paragraph G.C. 5.5, Lessor's prior consent shall not be required for any
nonstructural alterations or improvements made by Lessee to the Leased Premises,
the cost of which will not exceed Twenty Five Thousand Dollars ($25,000.00)
either individually or in the aggregate, and Lessee shall have the obligation to
remove such alterations or improvements upon termination of this Lease if
requested by Lessor unless otherwise agreed to in writing by Lessor.

G.C. 6     INDEMNIFICATION AND RELEASE OF CLAIMS.

         6.1 To the extent permitted by Law, Lessee will hold Lessor and its
agents and employees, harmless and indemnified at all times against injury
(including death), loss, damage, costs, expense (including reasonable attorneys'
fees) or liability resulting to any person or property by reason of any use
which may be made of the Leased Premises or any part thereof, or by reason of
any act or thing done or omitted to be done in, upon or about the Leased
Premises or any part thereof, except any such injury, loss, damage, cost,
expense or liability which is caused by the negligence or willful act or
omission of Lessor or its agents or employees; and Lessee will hold Lessor and
the Site, Building and the Leased Premises harmless and free and clear of any
and all claims, actions (at law or in equity), demands, penalties, liabilities,
judgments, costs and expenses, including reasonable attorneys' fees, arising in
connection therewith. In case any proceeding is brought against any such person,
Lessee agrees to defend such proceeding at its sole cost and expense by Legal
counsel reasonably satisfactory to Lessor.



                                      -11-
<PAGE>   11

         6.2 To the extent permitted by Law, Lessor will hold Lessee and its
agents and employees, harmless and indemnified at all times against injury
(including death), loss, damage, costs, expense (including reasonable attorneys'
fees) or liability resulting to any person or property by reason of any use
which may be made of the Building or the Site, by reason of any act or thing
done or omitted to be done in, upon or about the Building or the Site by Lessor
or its agents or employees.

         6.3 Lessor and Lessee, on behalf of themselves, their heirs, executors,
administrators and assigns, release unto each other, their heirs, executors,
administrators and assigns, all right to claim damages for any damage to the
Leased Premises or the Building or to other improvements located on the demised
premises or for the personal property owned by Lessee, the amount of which has
been paid either to the Lessor, Lessee or to any other person, firm or
corporation having an interest in said building or personal property under the
terms of any fire, extended coverage or other policy of insurance. Fire and
Extended Coverage Insurance Policies in effect on said Building and personal
property provided above shall be endorsed to waive subrogation.

G.C. 7     LESSEE INSURANCE.

         7.1 At all times subsequent to Lessee taking possession of the Leased
Premises, it shall, at its sole cost and expense, maintain:

         7.1.1 Comprehensive General Public Liability Insurance (including
primary coverage endorsement and contractor coverage endorsement covering
Lessee's indemnification set forth in Paragraph G. C. 6) against claims for
personal injury, death, or property damage occurring in connection with the use
and occupancy of the Leased Premises, naming Lessee and Lessor and Lessor's
agents as the named insureds, with limits of liability not less than the
following:

               Bodily Injury -
                 One Person:                                $1,000,000
                 Aggregate:                               1,000,000

               Property Damage -
                 On Accident:                               $1,000,000

         7.1.2 All risk contents coverage on Lessee's personal property located
in the Leased Premises in the amount necessary to fully insure such personal
property; and

         7.1.3 Workmen's Compensation Insurance covering all persons employed by
Lessee and all parties with respect to whom claims for death or bodily injury
could be asserted against Lessor, Lessee or the Site.



                                      -12-
<PAGE>   12

         7.2 With respect to policies which Lessee is required to procure and
maintain hereunder:

         7.2.1 Each such policy shall name Lessor and its agents as insureds
thereunder, as their interest may appear, and shall contain an agreement or
endorsement that it will not be cancelled by insurer without at least thirty
(30) days' prior written notice to Lessor;

         7.2.2 A certificate for each insurance policy issued by insurer
thereunder, shall be deposited by Lessee with Lessor upon lease execution;

         7.2.3 If Lessee furnishes any insurance in the form of a blanket
policy, it will furnish satisfactory proof that such blanket policy complies in
all respects with the provisions of this Lease, and that the coverage thereunder
is at least equal to the coverage which would be provided under a separate
policy covering only the Leased Premises;

         7.2.4 Each such policy shall be issued by insurers rated A+ or better
by Best Rating and licensed to do business in Illinois;

         7.2.5 Not less than thirty (30) days prior to the expiration date of
any such policy, Lessee will furnish Lessor with a certificate for any new
policy or a renewal thereof, in substitution of the expiring policy; and

         7.2.6 Lessee will not do, suffer or knowingly permit any act or
omission, whether upon the Leased Premises or otherwise, which might or would
result in voiding or impairing any such policy of insurance, or increasing the
risks insured over by such policy of insurance.

         7.3 At all times during the Term of this Lease, Lessor shall maintain
casualty insurance with respect to the Building and Site against loss or damage
by fire, lightning, theft or other risk from time to time included under
"Extended Coverage" policies, with an agreed amount endorsement; Comprehensive
General Public Liability Insurance (including primary coverage endorsement and
contractor coverage endorsement covering Lessor's indemnification set forth in
Paragraph G. C. 6) and rent loss insurance with respect to a casualty insured as
aforesaid in an amount not less than the annual rental (including rent
adjustments in respect to taxes, insurance and common expenses) of the Building
and the Leased Premises (all of which casualty and rent loss insurance is
hereinafter referred to as "Building Insurance").

         7.4 Lessee shall pay to Lessor as additional rent hereunder, within
thirty (30) days after being billed therefor:




                                      -13-
<PAGE>   13

         7.4.1 Lessee's Proportionate Share of the cost of securing the Building
Insurance referred to in Paragraph G.C.7.3 herein. Building Insurance billings
by Lessor may be issued monthly, quarterly or annually and shall be paid by
Lessee within thirty (30) days after being billed therefor. Such invoice to
Lessee shall include a copy of the insurance premium billing on which such
Building Insurance is calculated. There shall be excluded from Lessee's
responsibility to pay Building Insurance, the Insurance Stop, if any, for each
calendar year of the Term, prorated, if applicable for a portion of the calendar
year, which stop shall not be applied to any excess insurance premiums referred
to in 7.4.2 below; and

         7.4.2 In addition to Lessee's Proportionate Share of such Building
Insurance premium, Lessee shall be responsible for 100% of the increase in
Building Insurance premiums which result solely from Lessee's particular use of
the Leased Premises other than for the use originally intended hereunder, and as
can reasonably be allocated using appropriate insurance rating guidelines.
Lessor represents that each Lease hereafter executed shall impose a similar
obligation on other lessees in the Building.

G.C. 8   REPAIR OF BUILDING IN EVENT OF FIRE OR CASUALTY.

         8.1 If the Building or the Leased Premises are substantially destroyed
or rendered untenantable by fire or other casualty, Lessor shall have the right
to terminate this Lease by notice in writing to Lessee mailed within twenty (20)
days of the fire or other casualty. In any case of fire or other casualty damage
to the Leased Premises (except where this Lease is terminated by Lessor as
hereinbefore provided), Lessor shall repair and rebuild the Building or the
Leased Premises with reasonable diligence, provided, however, Lessor shall have
no obligation to restore or replace any of Lessee's property, fixtures,
machinery, equipment or leasehold improvements installed by Lessee. If any such
fire or other casualty renders the Leased Premises or any portion thereof
untenantable, the base and additional rent to be paid by Lessee hereunder shall
abate (by an amount bearing the same ratio to the total amount of rent for the
period of untenantability as to the untenantable portion of the Leased Premises
bears to the entire Leased Premises) during the period beginning with the date
of such fire or other casualty and ending with the date when the Leased Premises
are again rendered tenantable. Lessee shall have the right to terminate this
Lease if Lessor is obligated to repair or rebuild hereunder and has not
completed such repair or rebuilding within one hundred eighty (180) days after
such damage, by written notice thereof to Lessor within ten (10) days after said
180 day period.

G.C. 9   CONDEMNATION.

         9.1 If the whole of the Leased Premises shall be taken for any public
or quasi-public use under statute or by right of eminent domain or by private
purchase in lieu thereof, then this Lease shall automatically terminate as of
the date that title shall be taken. If any portion of the Leased Premises shall
be taken so as to render the 




                                      -14-
<PAGE>   14

remainder thereof unusable for the purpose for which the Leased Premises were
leased, then Lessor and Lessee shall each have the right to terminate this Lease
on thirty (30) days' notice to the other given within sixty (60) days after the
date of such taking.

         9.2 If any part of the Leased Premises shall be so taken and this Lease
shall not terminate or be terminated under the provisions of Paragraph G.C.9.1,
then the base and additional rent payable under this Lease shall be equitably
apportioned according to the space so taken, and if the reduction in rent cannot
be agreed upon by the parties, the matter shall be submitted to the American
Arbitration Association in the City of Chicago for determination in accordance
with its procedures at such time, and Lessor shall, at its own cost and expense,
restore the remaining portion of the Leased Premises with reasonable diligence
to the extent necessary to render it reasonably suitable for the purposes for
which it was leased and shall make all repairs to the Building in which the
Leased Premises are located to the extent necessary to constitute the Building a
complete architectural unit, provided the cost thereof shall not exceed the
proceeds of Lessor's condemnation award.

         9.3 All compensation awarded or paid upon such a total or partial
taking of the Leased Premises shall belong to and be the property of Lessor
without any participation by Lessee; provided, however, that nothing contained
herein shall preclude Lessee from prosecuting any claim against the condemning
authority in any such condemnation proceedings for loss of business, or
depreciation to, damage to, or cost of removal of, or for the value of stock,
trade fixtures, furniture and other personal property belonging to Lessee and
included in such taking; provided, however, that no such claim shall diminish or
otherwise adversely affect Lessor's award or the award of any fee mortgagee
("Mortgagee").

G.C. 10  ASSIGNMENT AND SUBLETTING.

         10.1 Except as otherwise provided in this Paragraph G.C. 10, Lessee
shall not, without in each and every case, Lessor's prior written consent, which
consent shall not be unreasonably withheld, conditioned or delayed:

         10.1.1 Make or permit any transfer of this Lease or any interest
hereunder, by operation of law, or otherwise; nor,

         10.1.2 Assign or convey this Lease or any interest hereunder; nor

         10.1.3 Sublet any part of the Leased Premises to any person or entity
whomsoever.

         10.2 Notwithstanding the foregoing, Lessor's consent shall not be
required for any assignment or other transfer of Lessee's interest in this Lease
or any sublease 




                                      -15-
<PAGE>   15

of any portion of the Leased Premises to any entity that (i) controls, is
controlled by or under common control with Lessee, (ii) results from the
transfer of all or substantially all of Lessee's assets or stock or (iii)
results from the merger or consolidation of Lessee with another entity or the
reorganization of Lessee. As used in this Paragraph G.C. 10.2, "control" means
the right to direct or indirect ownership of more than fifty percent (50%) of
the voting securities of an entity or possession of the right to direct the
entity's affairs.

G.C. 11  LESSOR'S PERFORMANCE OF LESSEE'S COVENANTS.

         11.1 Should Lessee at any time fail or omit to do any act or thing
provided under this Leased to be done by Lessee, Lessor may in its sole
discretion, upon ten days written notice to Lessee, itself do or cause to be
done such act or thing, including the payment of any and all water service
charges and other governmental impositions, any and all governmental permits and
other license fees and charges, the cost of maintenance and operation, or any
addition to or alteration or repair of improvement in the Leased Premises, any
insurance premium, any claim against or lien upon the Leased Premises, made or
filed by any laborer, supplier, material-man, principal contractor,
subcontractor, or other person, whether for work, labor or services performed
upon or materials supplied to the Leased Premises under this Lease.

         11.2 All monies paid by Lessor pursuant to the provisions of the above
paragraph shall be and constitute so much additional rental due hereunder from
Lessee to Lessor to be due and payable upon notice given to Lessee by Lessor of
the nature and amount thereof, with the next monthly installment of rent, with
interest upon any such amount at the rate of two percent (2%) above the prime
rate of interest charged by the First National Bank of Chicago from time to time
(or the highest lawful rate if less than such sum) from the date of payment by
Lessor until repayment thereof to Lessor by Lessee.

G.C. 12  CERTAIN RIGHTS RESERVED TO LESSOR.

         12.1 Lessor reserves the following rights:

         12.1.1 To have pass keys to the Leased Premises and no locks shall be
changed without the prior written consent of Lessor, provided Lessor shall not
have any access to or keys for Lessee's laboratory areas within the Leased
Premises;

         12.1.2 During business hours and upon reasonable notice to Lessee
(except in an emergency), to take any and all reasonable measures, including
inspections, repairs, alterations, additions and improvements to the Leased
Premises, or to the Building as may be necessary or desirable for the operation,
safety, protection or preservation thereof, provided that, Lessor shall use
reasonable efforts to not interfere with the operation of Lessee's business in
the Leased Premises and no such work shall 




                                      -16-
<PAGE>   16

permanently reduce the area rented by Lessee, and Lessee may, at it's option
select a representative to accompany Lessor on such endeavors; and

         12.1.3 To show the Leased Premises to prospective lessees or brokers
during the last six months of the Term of this Lease (and if vacated during such
period, to prepare the Leased Premises for reoccupancy) and to prospective
purchasers at all reasonable times, provide prior notice is given to Lessee in
each case.

G.C. 13  SUBORDINATION TO EXISTING AND FUTURE MORTGAGES.

         13.1 This Lease shall be subject and subordinate at all times to the
lien of any existing mortgage or mortgages and of mortgages which hereafter may
be made a lien on the Site and/or the Building; provided that so long as Lessee
is not in default under this Lease, its possession and use of the Leased
Premises and its rights and privileges hereunder shall not be disturbed or
interfered with by the Mortgagee or any purchaser upon a foreclosure of such
mortgage. Although no instrument or act on the part of the Lessee shall be
necessary to effectuate such subordination, the Lessee shall nevertheless
execute and deliver such further instruments, in form and content reasonably
acceptable to Lessee, subordinating this Lease to the lien of any such mortgages
as may be desired by the Mortgagee, provided the same acknowledges Lessee's
rights as hereinbefore specified.

G.C. 14  LESSOR'S REMEDIES.

         14.1     If:

                  (a) default shall be made in the payment of any sum required
         to be paid by Lessee under this Lease, and default shall continue for
         ten (10) days after receipt of written notice by Lessee; or

                  (b) default shall be made in the performance of any of the
         other covenants or conditions which Lessee is required to observe and
         perform, and such default shall continue for thirty (30) days after
         written notice by Lessor to Lessee; or

                  (c) if the interest of Lessee under this Lease shall be levied
         or under execution or other legal process; or

                  (d) if any petition shall be filed by or against Lessee to
         declare Lessee a bankrupt or to delay, reduce or modify Lessee's debts
         or obligations;

                  (e) or if any petition shall be filed or other action taken to
         reorganize or modify Lessee's capital structure if Lessee be a
         corporation or other entity; or

                  (f) if Lessee is declared insolvent according to law; or



                                      -17-
<PAGE>   17

                  (g) if any assignment of Lessee's property shall be made for
         the benefit of creditors; or

                  (h) if a receiver or trustee is appointed for Lessee or its
         property; or

                  (i) if Lessee shall abandon the Leased Premises during the
         Term of this Lease without payment of rent,

then Lessor may treat the occurrence of any one or more of the foregoing events
as a breach of this Lease (provided that no such levy, execution, legal process
or petition filed involuntarily against Lessee shall constitute a breach of the
same are removed or vacated within sixty (60) days from the date of the
creation, service or filing) and thereupon, at its option, may, without notice
or demand of any kind to Lessee or any other person, have any one or more of the
following described remedies in addition to all other rights and remedies
provided at law or in equity:

         14.1.1 Lessor may terminate this Lease and forthwith repossess the
Leased Premises and be entitled to recover as damages a sum of money equal to
the balance of the Term Rental then remaining unpaid hereunder, less the fair
rental value of the Leased Premises for said period, (without, in each such
case, commutation, in consideration of disregarding any future rent adjustments)
and any other sum of money and damages owed by Lessee to Lessor at such time;
and

         14.1.2 Lessor may terminate Lessee's right of possession and may
repossess the Leased Premises by forcible entry or detainer suit or otherwise,
without further demand or further notice of any kind to Lessee and without
terminating this Lease, in which event Lessor shall use its best efforts to
relet the same for the account of Lessee for such rent and upon such terms as
shall be reasonably satisfactory to Lessor. For the purpose of such reletting,
Lessor is authorized to decorate or to make any repairs, changes, alterations or
additions in or to the Leased Premises that may be necessary for such reletting,
and if Lessor shall be unable to relet the Leased Premises, or if the same are
relet and a sufficient sum shall not be realized from such reletting after
paying all of the costs and expenses of such decorations, repairs, change,
alterations and additions and the expense of such reletting, including real
estate commissions, reasonable attorneys' fees, and costs of collection of the
rent accruing therefrom, to satisfy the rent provided for in this Leased to be
paid, then Lessee shall pay to Lessor as damages a sum equal to the amount of
the rental reserved in this Lease for such period or periods; or if the Leased
Premises have been relet, the Lessee shall satisfy and pay any such deficiency
upon demand therefor from time to time and Lessee agrees that Lessor may file
suit to recover any sums falling due under the terms of this paragraph from time
to time, and that no delivery or recovery of any portion due Lessor hereunder
shall be a defense to any subsequent action brought for any amount not
theretofore reduced to judgment in favor of Lessor.





                                      -18-
<PAGE>   18

G.C. 14A. LESSEE'S REMEDIES. If default shall be made by Lessor in the
performance of any of its obligations hereunder, and such default shall continue
for thirty (30) days after written notice thereof by Lessee to Lessor, Lessee
may pursue any remedies available to it under the law and/or this Lease.

G.C. 15  SURRENDER OF POSSESSION.

         15.1 Upon the termination of this Lease or upon the termination of
Lessee's right of possession, Lessee shall at once surrender possession of the
Leased Premises to Lessor and remove all effects therefrom, and if such
possession is not immediately surrendered, Lessor may forthwith re-enter the
Leased Premises and repossess itself thereof as of its former estate and remove
all persons and effects therefrom, using such force as may be reasonably
necessary without being guilty in any manner of trespass or forcible entry or
detainer. Without limiting the generality of the foregoing, Lessee agrees to
remove at the termination of the Term, Lessee's movable office furniture, trade
fixtures and office equipment and such alterations, improvements and additions
as were installed by Lessee, as may be requested in writing by Lessor, unless at
the time such alterations, improvements and additions were installed by Lessee,
Lessee obtained Lessor's written agreement that such items would not have to be
removed, and Lessee shall repair all damage resulting from such removal. If
Lessee shall fail or refuse to remove all such property from the Leased
Premises, Lessee shall be conclusively presumed to have abandoned the same and
title thereto shall thereupon pass to Lessor without any costs, either by
setoff, credit, allowance or otherwise, and Lessor may, at its option, accept
the title to such property or at Lessee's expense, may remove the same, or any
part thereof, in any manner that Lessor shall choose, and store the same without
incurring liability to Lessee or any other person. Lessee shall leave the Leased
Premises in a broom-clean condition, subject to ordinary wear and tear and
damage by casualty or condemnation. Lessee shall have no obligation to remove
any alterations, improvements or additions which were not installed by or on
behalf of Lessee.

G.C. 16  HOLDING OVER.

         16.1 Lessee shall pay to Lessor holdover rental at the rate specified
herein for each day Lessee shall retain possession of the Leased Premises, or
any part thereof, after the termination of this Lease, whether by lapse of time
or otherwise and shall also pay all damages sustained by Lessor on account
thereof. The provisions of this paragraph shall not operate as a waiver by
Lessor of any rights of re-entry hereinbefore provided and shall not be deemed
an approval or consent by Lessor to any such holdover.

G.C. 17  NOTICES.




                                      -19-
<PAGE>   19

         17.1 All notices to be given by one party to the other under this Lease
shall be in writing, mailed or delivered as follows:

         To Lessor:     Howard M. Ruskin
                       555 Skokie Boulevard
                       Northbrook, Illinois 60062
                Fax No.: 847-480-4687

         To Lessee:     Endorex Corporation
                       900 North Shore Drive
                       Lake Bluff, Illinois 60044
                       Attn: Mr. Dave Franckowiak
                       Fax No. : 847-604-8570

or to such other address subsequently designated by notice sent by one party to
the other.

         17.2 Mailed notices shall be sent by United States Certified or
Registered Mail, postage prepaid, or by facsimile transmission. Unless otherwise
specified herein, such notices shall have been deemed to have been given by
posting in the United States Mail, or upon receipt of the facsimile
transmission.

G.C. 18  ESTOPPEL CERTIFICATE.

         18.1 Each of Lessor and Lessee agrees from time to time, upon not less
than ten (10) days' prior request by the other party, to deliver to the
requesting party a statement, in writing, certifying to the extent same is true:

         18.1.1 That this Lease is unmodified and in full force and effect (or
if there have been modifications that the Lease, as modified, is in full force
and effect);

         18.1.2 The dates to which rent and other charges have been paid; and

         18.1.3 That the requesting party is not in default under any provisions
of this Lease, or, if in default, the nature thereof in detail.

G.C. 19  SECURITY DEPOSIT.

         If required hereunder, as security for the prompt and faithful
performance by Lessee of all the terms hereof, Lessee shall deposit with Lessor,
concurrently with the execution hereof by Lessor, the sum specified herein as
and for a Security Deposit. Said sum may be applied by Lessor for the purpose of
curing any default or defaults of Lessee under this Lease, If said sum or any
part thereof is used, applied or retained in curing any such default, Lessee
shall, upon demand immediately deposit with Lessor an 



                                      -20-
<PAGE>   20

amount in cash equal to the amount so used, applied or retained. Default by
Lessee in paying to Lessor any amount required to restore the Security Deposit
after any application thereof shall afford to Lessor the same remedies as in the
default of the payment of rent. If Lessee has not defaulted hereunder or if
Lessor has not applied said sum to said default, then the Security Deposit or
any portion thereof not so applied by Lessor shall be paid in cash to Lessee at
the termination of this Lease. No interest shall accrue or be payable by Lessor
with respect to such deposit.

G.C. 20  MISCELLANEOUS.

         20.1 All rights and remedies of Lessor under this Lease shall be
cumulative and none shall exclude any other rights and remedies allowed by law.

         20.2 Each of the provisions of this Lease shall extend to and shall as
the cause may require, bind or inure to the benefit, not only of Lessor and of
Lessee, but also of their respective heirs, legal representatives, successors
and assigns, provided this clause shall not permit any assignment contrary to
the provisions of Paragraph G.C.10 hereof.

         20.3 The non-prevailing party shall pay, upon demand, all of the
prevailing party's costs, charges and expenses, including reasonable attorneys'
fees incurred by the prevailing party in enforcing its rights under this Lease.

         20.4 All of the representations and obligations of Lessor and Lessee
are contained herein, and no modification, waiver or amendment of this Lease, or
of any of its conditions or provisions, shall be binding upon the Lessor or
Lessee unless in writing, signed by the party to be charged, or a duly
authorized agent of the party to be charged.

         20.5 This Lease may be executed in any number of counterparts. Each
such executed counterpart shall be deemed an original hereof and all such
executed counterparts shall together constitute but one and the same instrument,
which instrument shall for all purposes be sufficiently evidenced by any such
executed counterpart.

         20.6 No delay or omission of Lessor or Lessee to exercise any right or
power arising from any default shall impair any such right or power or be
construed to be a waiver of any such default or any acquiescence therein. No
waiver of any breach of any of the covenants of this Lease shall be construed,
taken or held to be a waiver of any other breach of waiver, acquiescence in or
consent to any further or succeeding breach of the same covenant.

         20.7 If required by the Mortgagee, Lessee shall furnish Lessor annually
within ninety (90) days after the end of each of Lessee's fiscal years, a copy
of its annual 




                                      -21-
<PAGE>   21

audited and certified statement, if same is prepared, and if not, the unaudited
Balance Sheet and income statement of Lessee, certified by a responsible
financial officer of Lessee. Lessee agrees that Lessor may deliver a copy of
such statements to its Mortgagee, but otherwise Lessor shall treat such
statements and information contained therein as strictly confidential.

         20.8  Time is of the essence of this Lease, and all provisions herein
relating thereto shall be strictly construed.

         20.9  Nothing contained herein shall be deemed or construed by the
parties hereto, nor by any third party, as creating the relationship of
principal and agent or of partnership, or of joint venture by the parties
hereto, it being understood and agreed that no provision contained in this Lease
nor any acts of the parties hereto shall be deemed to create any relationship
other than the relationship of landlord and tenant.

         20.10 The captions of this Lease are for convenience only and are not
to be construed as part of this Lease and shall not be construed as defining or
limiting in any way the scope or intent of the provisions hereof.

         20.11 If any term or provision of this Lease shall to any extent be
held invalid or unenforceable, the remaining terms and provisions of this Lease
shall not be affected thereby, but each term and provision of this Lease shall
be valid and be enforced to the fullest extent permitted by law.

         20.12 This Lease shall be construed and enforced in accordance with the
laws of the State of Illinois.

         20.13 Intentionally Deleted.

         20.14 All amounts owed by either party to the other pursuant to any
provision of this Lease, if not paid when due, shall bear interest at the rate
of 2% above the prime rate of interest charged by the First National Bank of
Chicago from time to time from the date due until the date paid, unless a lesser
rate shall then be the maximum contract rate permissible by law, in which event
such lesser rate shall be charged.

         20.15 In the event Lessor shall assign this Lease and/or sell or convey
the Building or Site, same shall operate to release Lessor herein, from and
after the date of the sale, from any liability for any of the covenants or
conditions, express or implied, herein contained in favor of Lessee, provided
the transferee assumes in writing such liability, covenants and conditions. In
such event, Lessee agrees to look solely to the successor in interest of Lessor
in and to this Lease. This Lease shall not be affected by such assignment or
sale, and Lessee agrees to attorn to the purchaser or assignee, subject to the
above condition.





                                      -22-
<PAGE>   22

G.C. 21  REAL ESTATE BROKERAGE COMMISSION.

         21.1 Lessor and Lessee represent that no person or entity other than
Lessor's Broker can properly claim a right to any commission based on the acts
of that party with respect to this Lease. Lessor shall pay any commission
payable to Lessor's Broker pursuant to a separate agreement between Lessor and
Lessor's Broker. Lessor and Lessee agree to indemnify and hold the other
harmless from all damages, liability, and expense (including reasonable
attorneys' fees) arising from any claims or demands of any other broker or
brokers or finders other than Lessor's Broker for any commission alleged to be
due such broker or brokers or finders in connection with its participating in
the negotiation of this Lease with said indemnifying party.

G.C. 22  BOOKS AND RECORDS

         22.1 Lessor shall maintain books and records showing Ownership Taxes,
Building Insurance and Common Expenses in accordance with sound accounting and
management practices. Lessee shall have the right to examine Lessor's books and
records with respect to such items upon five (5) days prior written notice and
during normal business hours within forty-five (45) days following the
furnishing by the Lessor to the Lessee of Lessor's Statement for such any such
expense. Unless the Lessee shall take written exception to any item within sixty
(60) days after the furnishing of the Lessor's statement containing said item,
such Lessor's statement shall be considered as final and accepted by the Lessee.
If Lessee takes exception to any item in Lessor's statement within the
applicable time period and if Lessor and Lessee are unable to agree on the
correctness of said item, then either party may refer the decision of said issue
to a reputable firm of independent certified public accountants designated by
the referring party and reasonably acceptable to the non-referring party and the
decision of said accountants shall be conclusively binding on the parties. The
party required to make payment under such adjustment shall pay all fees and
expenses involved in such decision unless the payment represents five percent
(5%) or less of Lessee's Proportionate Share of the







                                      -23-
<PAGE>   23


Ownership Taxes, Building Insurance and Common Expenses for such year, in which
case Lessee shall bear all such fees and expenses.



LESSOR:

/s/ Howard M. Ruskin
- ------------------------------
Howard M. Ruskin


LESSEE:

ENDOREX CORPORATION

By: /s/ David G. Franckowick
   ---------------------------
Its: Controller/Treasurer
    -----------------------




















                                      -24-

<PAGE>   1



                                                                      EX. 10.16
                                     CONFIDENTIAL TREATMENT HAS BEEN SOUGHT FOR
                                PORTIONS OF THIS EXHIBIT PURSUANT TO RULE 24B-2
                          UNDER THE SECURITIES EXCHANGE AC TO 1934, AS AMENDED.


                           JOINT DEVELOPMENT AND OPERATING AGREEMENT, made as of
         January 21, 1998 by and among ELAN CORPORATION, PLC, a public limited
         company incorporated under the laws of Ireland ("Elan"), ELAN
         INTERNATIONAL SERVICES, LTD., a Bermuda corporation ("EIS"), ENDOREX
         CORP., a Delaware corporation ("Endorex"), ORASOMAL TECHNOLOGIES, INC.
         a Delaware corporation ("Orasomal"), and ENDOREX VACCINE DELIVERY
         TECHNOLOGIES, INC., a Delaware corporation (the "Company").


                                    RECITALS

A.       Orasomal has proprietary know-how and expertise relating, inter alia,
         to immunology and is knowledgeable in the discovery, research,
         development, manufacture and marketing of pharmaceutical formulations
         capable of delivering drugs, including oral or mucosal Vaccine
         delivery. Orasomal owns or has licensed the Orasomal Technology.
         Orasomal also owns and uses certain trademarks in connection with the
         manufacture, marketing and sale of such compounds, including the
         Orasomal Trademarks.

B.       Elan is knowledgeable in the discovery, research, development,
         manufacture and marketing of pharmaceutical formulations capable of
         delivering drugs, including oral or mucosal Vaccine delivery. Elan owns
         or has licensed the Elan Technology. Elan also owns and uses certain
         trademarks in connection with the manufacture, marketing and sale of
         such compounds, including the Elan Trademarks.

C.       EIS and Endorex have, as of the date hereof, subscribed for the initial
         share capital of the Company and agreed to co-operate in the management
         of its business, which will be to research and develop certain Products
         incorporating the technologies developed and/or to be developed by Elan
         and Orasomal and to distribute and sell such Products throughout the
         world.

D.       Elan, EIS, Endorex and Orasomal have agreed to enter into this
         Agreement for the purpose of recording the terms and conditions of the
         Joint Venture and regulating their relationship with each other and
         certain aspects of the affairs of and their dealings with the Company.



<PAGE>   2


                                    AGREEMENT

                                    CLAUSE 1

                                   DEFINITIONS

1.1      In this Agreement, the following expressions shall, where not
         inconsistent with the context, have the following meanings
         respectively.

         "ACQUIRING PARTY" shall have the meaning assigned to it in Clause 9.5;

         "ADDITIONAL CAPITAL" means, for each of EIS and Endorex, the amount of
         funds, if any, contributed to the Company subsequent to the first
         anniversary of the Closing Date;

         "AFFILIATE" and "SUBSIDIARY" mean any corporation or entity, other than
         the Company, controlling, controlled or under the common control of
         Elan or Endorex, as the case may be. For the purposes of this
         definition and Clause 17.3, "Control" shall mean direct or indirect
         ownership of fifty percent (50%) or more of the stock or shares
         entitled to vote for the election of directors;

         "AGREED" means agreed by all Parties and confirmed in writing;

         "AGREEMENT" means this agreement (which expression shall be deemed to
         include the Recitals and the Schedules hereto);

         "BUSINESS" means the business of the Company as described in Clause 2
         and as more particularly specified in the Business Plan and such other
         business as the Parties may agree from time to time in writing should
         be carried on by the Company;

         "BUSINESS PLAN" means the plans to be prepared and approved by the
         Directors, including mutual agreement of the Elan Director and the
         Endorex Director, pursuant to Clause 14, in conjunction with the
         Research and Development Programs, for the conduct of the Business of
         the Company for each Financial Year for the duration of this Agreement
         which shall include, in particular, details of the planned budget for
         research and development expenses to be incurred in that Financial
         Year, for which each of the Participants shall be responsible, and how
         such expenses shall be funded;

         "CLOSING DATE" means January 21, 1998;

         "COMPANY PROGRAM TECHNOLOGY" shall have the meaning assigned to it in
         Clause 6.4;






                                       2
<PAGE>   3



         "COMPANY SUBSCRIPTION AGREEMENT" means the Subscription and
         Stockholders' Agreement of Endorex Vaccine Delivery Technologies, Inc.,
         made by and between EIS, Endorex and the Company as of the date hereof;

         "COST" means, depending upon the context, one of the following:

                       In the case of the [****], Cost shall comprise, [****]
                       excluding [****].

                       In the case of [****], Cost will be calculated, [****],
                       in accordance with [****] and will exclude [****].

                       In the case of [****], Cost will comprise the amount
                       [****], including [****] and [****];

         "DIRECTORS" means, collectively, the Elan Director, the Endorex
         Director and where applicable, the Independent Director;

         "DISPUTE" means, collectively, a Program Dispute and a Management
         Dispute, each as defined in Clause 16;

         "EFFECTIVE DATE" means December 31, 1997;

         "ELAN DIRECTOR" means a director of the Company to be appointed by EIS,
         pursuant to the terms of the Company Subscription Agreement;

         "ELAN LICENSE AGREEMENT" means the license agreement between Elan and
         the Company dated as of the date hereof;

         "ELAN OPTION" means the right of Elan, as described in the Company
         Subscription and Stockholders Agreement made by and among EIS, Endorex
         and the Company, as of the date hereof, whereby Elan may increase its
         ownership percentage of Company common stock to [****];

         "ELAN PROGRAM TECHNOLOGY" has the meaning assigned to it in Clause
         6.3(i);


**** REPRESENTS MATERIAL REACTED PURSUANT TO A REQUEST 
FOR CONFIDENTIAL TREATMENT PURSUANT TO RULE 24B-2 UNDER 
THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED.









                                       3
<PAGE>   4



         "ELAN TECHNOLOGY" has the meaning assigned to it in the Elan License
         Agreement;

         "ENDOREX DIRECTOR" means a director of the Company to be appointed by
         Endorex, pursuant to the terms of the Company Subscription Agreement

         "ENDOREX OPTION" means the right of Endorex, as described in the
         Company Subscription and Stockholders Agreement made by and among EIS,
         Endorex and the Company, as of the date hereof to increase its
         percentage ownership of Company common stock to [****];

         "EXPERT" shall have the meaning assigned to it in Clause 16.5;

         "FDA" means the United States Food and Drug Administration or any
         successor agencies, the approval of which is necessary to market a
         product in the United States of America or any other relevant
         regulatory authority the approval of which is necessary to market a
         product in any other country in the Territory;

         "FACTOR" means an interest rate of [****] per annum, from and after the
         Closing Date;

         "FIELD" shall be defined as the research, development, and
         commercialization of oral and mucosal delivery technologies for
         therapeutic and prophylactic Vaccines for humans and animals;

         "FINANCIAL YEAR" means that time period commencing on January 1st and
         expiring on December 31st of each calendar year;

         "FIRST RIGHT OF NEGOTIATION" shall have the meaning assigned to it in
         section 9.5;

         "GLP" AND "GMP" means current Good Laboratory Practises and current
         Good Manufacturing Practises, respectively;

         "INDEPENDENT THIRD PARTY" means any Person other than Elan, EIS,
         Endorex, Orasomal or the Company and/or any of their respective
         Affiliates and advisors;

         "INITIAL FUNDING" means the purchase of Common Stock of the Company
         made as of the date hereof, pursuant to the Company Subscription
         Agreement;

         "KNOW-HOW" means all trade secrets, confidential scientific, technical
         and medical information and expertise, technical data and marketing
         information, studies and data from time to time developed, produced by
         or on behalf of Elan, Orasomal or the Company, as the case may be,
         whether before the Effective Date or during the Term including, but not

**** REPRESENTS MATERIAL REACTED PURSUANT TO A REQUEST 
FOR CONFIDENTIAL TREATMENT PURSUANT TO RULE 24B-2 UNDER 
THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED.






                                       4
<PAGE>   5


         limited to, unpatented inventions, discoveries, theories, plans, ideas
         (whether or not reduced to practice) relating to the research and
         development, manufacture, registration for marketing, use or sale of
         the Product, toxicological, pharmacological, analytical and clinical
         data, bioavailability studies, product forms and formulations, control
         assays and specifications, methods of preparation and stability data;

         "LICENSE AGREEMENTS" means the Elan License Agreement and the Orasomal
         License Agreement;

         "LISTED COMPANY" means the companies set forth in Schedule 3 and their
         respective controlled (as such term is used in the definition of
         Affiliates above) subsidiaries;

         "ORASOMAL LICENSE AGREEMENT" means the license agreement between
         Orasomal and the Company dated as of the date hereof;

         "ORASOMAL PROGRAM TECHNOLOGY" has the meaning assigned to it in Clause
         6.3(ii);

         "ORASOMAL TECHNOLOGY" has the meaning assigned to it in the Orasomal
         License Agreement;

         "PARTICIPANT" means Endorex or Elan, as the case may be, and
         "Participants" means each of the Participants together;

         "PARTY" means Elan, EIS, Endorex, Orasomal or the Company, as the case
         may be, and "PARTIES" means all or some of them together, as
         applicable;

         "PATENTS" means all and any patents and any applications therefor in
         the Territory (including any and all divisions, continuations,
         continuations-in-part, extensions, additions or reissues thereto or
         thereof);

         "PERSON" shall mean an individual, partnership, corporation, limited
         liability company, business trust, joint stock company, trust,
         unincorporated association, joint venture, or other entity of whatever
         nature;

         "PRODUCT(S)" means [****];

         "PROGRAM KNOW-HOW" means all Know-How produced, created or acquired
         pursuant to one or more of the Research and Development Programs;


**** REPRESENTS MATERIAL REACTED PURSUANT TO A REQUEST
FOR CONFIDENTIAL TREATMENT PURSUANT TO RULE 24B-2 UNDER 
THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED.






                                       5
<PAGE>   6




         "PROGRAM PATENTS" means the inventions and underlying Patents that
         constitute the inventions or discoveries that have been or subsequently
         may be conceived pursuant to one or more of the Research and
         Development Program, or are acquired or licensed by the Company from an
         Independent Third Party;

         "PROGRAM TECHNOLOGY" means the Program Patents and/or the Program
         Know-How;

         "PROVIDING PARTY" shall have the meaning assigned to such term in
         Clause 4.2; 
         "R&D COMMITTEE" means the committee established pursuant to
         Clause 3.2;

         "RESEARCH AND DEVELOPMENT PROGRAM" means, depending on the context, one
         or more programs of research and development work being conducted or to
         be conducted by, inter alia, Orasomal and Elan for and on behalf of the
         Company which have been devised by the R&D Committee and approved by
         the Management Committee;

         "SHARES" means the common stock of the Company, par value $.01 per
         share;

         "TECHNOLOGIES" means collectively, the Orasomal Technology together
         with the Elan Technology;

         "TERRITORY" means [****];

         "TERM" shall have the meaning assigned to such word in Clause 17.1;

         "THIRD PARTY TECHNOLOGY" shall have the meaning assigned to it in
         Clause 9.5;

         "UNITED STATES DOLLAR" and "US$" means the lawful currency for the time
         being of the United States of America; and

         "VACCINES" means a [****] administered to [****] to a specific [****],
including a [****] that is either [****];

1.2      Words importing the singular shall include the plural and vice versa.

1.3      Unless the context otherwise requires, reference to a recital, article,
         paragraph, provision, clause or schedule is to a recital, article,
         paragraph, provision, clause or schedule of or to

**** REPRESENTS MATERIAL REACTED PURSUANT TO A REQUEST 
FOR CONFIDENTIAL TREATMENT PURSUANT TO RULE 24B-2 UNDER 
THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED.







                                       6
<PAGE>   7


this Agreement.

1.4      Reference to a statute or statutory provision includes a reference to
         it as from time to time amended, extended or re-enacted.

1.5      The headings in this Agreement are inserted for convenience only and do
         not affect its construction.

1.7      Unless the context or subject otherwise requires, references to words
         in one gender include references to the other genders.

1.8      References to "include" or "including" shall be construed as examples
         only, and in no way be read as limiting.

                                    CLAUSE 2

                         REPRESENTATIONS AND WARRANTIES

2.1      Each of Elan, EIS, Endorex and Orasomal hereby represents and warrants
         to the other that the Shares acquired or to be acquired by it in the
         Company will be acquired for its own absolute beneficial ownership and
         not on behalf of any other Person.

2.2      Each of Elan, EIS, Endorex and Orasomal hereby represents and warrants
         to the other that:

         (i)      it is duly incorporated under the laws of its place of
                  incorporation;

         (ii)     it has full authority and capacity to enter into and perform
                  its obligations under this Agreement (having obtained all
                  requisite corporate and governmental approvals);

         (iii)    it is not engaged in any litigation or arbitration, or in any
                  dispute or controversy reasonably likely to lead to
                  litigation, arbitration or any other proceeding, which would
                  materially affect the validity of this Agreement, the Party's
                  fulfilment of its respective obligations under this Agreement
                  or the business of the Company as contemplated herein; and

         (iv)     this Agreement has been fully authorised, executed and
                  delivered by it and it has full legal right, power and
                  authority to enter into and perform this Agreement, which
                  constitutes a valid and binding agreement between the Parties.













                                       7
<PAGE>   8



                                    CLAUSE 3

                      DIRECTION OF RESEARCH AND DEVELOPMENT

3.1      The Directors shall appoint a management committee (the "MANAGEMENT
         COMMITTEE") to perform certain operational functions, such delegation
         to be consistent with the Directors' right to delegate powers pursuant
         to the Company's Certificate of Incorporation. The Management Committee
         shall initially consist of [****] members, [****] of whom shall be
         nominated by the Elan Director and [****] of whom shall be nominated by
         the Endorex Director, and each of whom shall be entitled to one vote,
         whether or not present at any Management Committee meeting during which
         such operational functions are discussed. Each of the Elan Director and
         the Endorex Director shall be entitled to remove any of their nominees
         to the Management Committee and appoint a replacement in place of any
         nominees so removed. The number of members of the Management Committee
         may be altered if agreed to by the Directors; provided that at all
         times during the term of this Agreement, each of the Elan Director and
         the Endorex Director shall be entitled to appoint an equal number of
         members to the Management Committee.

3.2      The Management Committee shall appoint a research and development
         committee (the "R&D COMMITTEE"). The R&D Committee shall initially
         consist of [****] members, [****], and each of whom shall have one
         vote, whether or not present at an R&D Committee meeting during which
         research and development issues are discussed. The nominees of the Elan
         Director or the nominees of the Endorex Director shall be entitled to
         remove any of their nominees to the R&D Committee and appoint a
         replacement in place of any nominees so removed. The number of members
         of the R&D Committee may be altered if agreed to by the Management
         Committee; provided, that at all times during the term of this
         Agreement an equal number of members shall be nominated by the nominees
         of the Elan Director and by the nominees of the Endorex Director.

3.3      The Management Committee shall be responsible for, inter alia,
         devising, implementing and reviewing strategy for the Business and, in
         particular, devising the Company's strategy for research and
         development in relation to the Field and to monitor and supervise the
         implementation of the Company's strategy for research and development.

3.4      The Management Committee shall report all significant developments to
         the Directors on the occurrence thereof and, in addition, shall report
         at quarterly intervals to the Directors. Any dispute or deadlock among
         the members of the Management Committee shall be


**** REPRESENTS MATERIAL REACTED PURSUANT TO A REQUEST 
FOR CONFIDENTIAL TREATMENT PURSUANT TO RULE 24B-2 UNDER 
THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED.







                                       8
<PAGE>   9


         referred by it to the Directors.

3.5      The R&D Committee shall be responsible for the design of the Research
         and Development Programs for consideration by the Management Committee
         and the implementation of the Research and Development Programs as
         approved by the Management Committee. The R&D Committee shall meet at
         regular intervals to monitor the progress of the Research and
         Development Programs and to report on their progress to the Management
         Committee.

                                    CLAUSE 4

                       CONDUCT OF RESEARCH AND DEVELOPMENT

4.1.     During the 12 month period commencing on the January 1, 1998, each of
         Elan and Endorex shall undertake to perform research and development
         related to the commercialisation of Products in an amount of
         approximately $1.5 million each, as stated in the Business Plan, in
         furtherance of the development and cultivation of the Program
         Technology. Subsequent to December 31, 1998, Elan and Endorex shall
         fund research and development work in accordance with their respective
         ownership interest in the Company. The cost of such development work 
         shall be [****].

4.2.     Whenever commercially and technically feasible, the Company shall
         contract with Elan or Orasomal, as the case may be, to perform
         research, development and experimentation activities for the purpose of
         developing the Field and the Products (each, a "PROVIDING PARTY"). In
         the event that the Company [****], the Company [****]; provided, that
         the [****] is not a [****].

4.3      Subject to the provisions of Clause 4.1, each of Elan and Orasomal
         shall, at its respective option, provide such research and development
         services in the Field as may reasonably be required by the Company. The
         research and development work conducted by the Providing Party for the
         Company shall be in accordance with the Research and Development
         Program devised by the R&D Committee as approved by the Management
         Committee. The Providing Party shall use its reasonable endeavors to
         conduct its portion of the Research and Development Program in
         accordance with the timetable set out in the Research and Development
         Program. The Providing Party shall, in accordance with the terms and
         conditions set forth in this Agreement, undertake reasonably diligent
         efforts, as would be


**** REPRESENTS MATERIAL REACTED PURSUANT TO A REQUEST 
FOR CONFIDENTIAL TREATMENT PURSUANT TO RULE 24B-2 UNDER 
THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED.







                                       9
<PAGE>   10


         deemed commensurate with the achievement of its own business aims for
         a similar product of its own, to conduct its part of the Research and 
         Development Program.

4.4      The Research and Development Program(s) shall be directed by the R&D
         Committee, subject to the strategic direction of the Management
         Committee. In conducting the Research and Development Program(s), the
         Providing Party shall co-operate fully with the R&D Committee, the
         Management Committee and Orasomal or Elan as the case may be. Each
         Providing Party shall maintain the facilities used by it for the
         performance of the Research and Development Program in compliance with
         the applicable requirements of the FDA and other regulatory
         authorities, including GMP and GLP standards.

4.5      The Company may evaluate the reports and other data furnished by the
         Providing Party for the purpose, inter alia, of deciding whether or not
         to proceed with all or part of the applicable Research and Development
         Program.

4.6      Elan, Endorex and the Company shall agree on a budget in connection
         with the activities to be undertaken by Elan and Orasomal during the
         Research and Development Program, which budget shall form part of the
         Research and Development Program. In the event that as a result of
         additional activities to be undertaken by the Providing Party at the
         request of the Company the budget needs to be revised, Elan, Endorex
         and the Company will agree on such revision prior to the Providing
         Party commencing any such additional development activities.

4.7      The Providing Party will keep accurate records consistent with its
         normal business practices of the efforts expended by it under the
         Research and Development Program for which it is charging the Company,
         which will include the time spent by each person working on the
         Research and Development Program.

4.8      [****], the Providing Party shall permit the Company or its duly
         authorized representative on reasonable notice and at any reasonable
         time during normal business hours to have access to inspect and audit
         the accounts and records of the Providing Party and any other book,
         record, voucher, receipt or invoice relating to the calculation or the
         Cost of the Research and Development Program or, where applicable, for
         the supply of the Products and to the accuracy of the reports which
         accompanied them. Any such [****] shall be at the [***], except that if
         any such [****] in the amount of [****] for the [****] in any calendar
         quarter [****] hereunder, then the [****] shall be [****] instead of
         [****]. Any [****] properly [****]

**** REPRESENTS MATERIAL REACTED PURSUANT TO A REQUEST 
FOR CONFIDENTIAL TREATMENT PURSUANT TO RULE 24B-2 UNDER 
THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED.


  




                                     10
<PAGE>   11


         [****] to the [****] shall be [****]. If such [****] properly [****].

4.9      Subject to the provisions of Clause 4.1, [****] carried out [****] at
         the [****], subject to the proper [****] of [****].

                                    CLAUSE 5

                              REGULATORY APPROVALS

5.1      During the relevant regulatory procedure, the Company shall keep the
         other Parties promptly and fully advised of the relevant regulatory
         activities, progress and procedures. The Company shall inform the other
         Parties of any dealings it shall have with the FDA, and shall furnish
         the other Parties with copies of all correspondence. The Parties shall
         collaborate in relation to obtaining the approval of the FDA for final
         approved labelling.

5.2      Any and all regulatory applications or approvals filed hereunder for
         the Product [****]; provided, that [****] to enable those Parties
         [****] under this Agreement, the Orasomal License and the Elan License.
         The Company shall maintain such regulatory approvals at its own cost.

5.3      The costs and expenses of any filings and proceedings made by the
         Company to the FDA, including post approval studies required by the FDA
         in respect of the Product, and to maintain the FDA approval hereunder
         shall be paid by the Company.

5.4      It is hereby acknowledged that there are inherent uncertainties
         involved in the registration of pharmaceutical products with the FDA
         insofar as obtaining approval is concerned and such uncertainties form
         part of the business risk involved in undertaking the form of
         commercial collaboration as set forth in this Agreement. Therefore,
         except for using its reasonable efforts, neither Elan nor Endorex shall
         have any liability to the Company solely as a result of any failure of
         the Product to achieve the approval of the FDA, or any other regulatory
         body in the Territory.

**** REPRESENTS MATERIAL REACTED PURSUANT TO A REQUEST 
FOR CONFIDENTIAL TREATMENT PURSUANT TO RULE 24B-2 UNDER 
THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED.







                                       11
<PAGE>   12



                                    CLAUSE 6

                            PROPERTY OWNERSHIP RIGHTS

6.1      The Company [****], the [****] and the [****]. Elan and Orasomal hereby
         [****], which they may respectively [****], to the Company. Elan and
         Orasomal shall each [****] in the aforesaid [****].

6.2      [****] shall own or license the legal and equitable title to the
         [****]. Such rights of [****] shall be subject to the [****]. [****]
         shall own or license the legal and equitable title to the [****]. Such
         rights of [****] shall be subject to the [****].

6.3      All Program Technology developed by or on behalf of the Company shall:

         (i)      if based upon, or significantly derived from, [****],
                  constitute [****] (the "[****]"); or

         (ii)     if based upon, or significantly derived from, [****]
                  constitute [****] (the "[****]");

         In determining whether Program Technology is based upon or
         significantly derived from Elan Technology or Orasomal Technology,
         reference shall be made to the Participant's respective patents, patent
         applications and other relevant evidence of the Participants'
         intellectual property such as laboratory notebooks.

6.4      Any technology acquired or licensed by the Company from an Independent
         Third Party and any Program Technology which does not constitute Elan
         Program Technology or Orasomal Program Technology shall constitute
         Company Program Technology (the "COMPANY PROGRAM TECHNOLOGY").

6.5      [****] shall be [****] (the term of which may survive this Agreement),
         and [****] (the term

**** REPRESENTS MATERIAL REACTED PURSUANT TO A REQUEST 
FOR CONFIDENTIAL TREATMENT PURSUANT TO RULE 24B-2 UNDER 
THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED.








                                       12
<PAGE>   13


         of which may survive this Agreement). As a guide only, the parties
         anticipate that [****] (i.e. [****] including [****]). In connection
         with such [****], the Company's rights of inspection and audit and
         other applicable terms shall be negotiated at the time [****], such
         provisions, where applicable, to be mutatis mutandis with those set out
         in [****].

6.6.     To the extent that the Company Program Technology shall have
         application outside the Field, the Company shall grant a world-wide
         license to Elan and/or Orasomal on terms to be negotiated in good
         faith, including whether such a licence should be exclusive,
         semi-exclusive or non-exclusive in nature, the extent of the Company
         Program Technology to be licensed, and the financial terms which shall
         be generally consistent with prevailing market terms. In the event that
         the parties cannot agree on such terms, the parties shall submit their
         dispute to an Expert to determine the terms of such licenses.

                                    CLAUSE 7

                                  PATENT RIGHTS

7.1      The rights and obligations of the Participants and the Company in
         respect of any Patents claiming the Technologies or the Program
         Technology are governed by the provisions of the License Agreements.

                                    CLAUSE 8

                                    EQUIPMENT

8.1      Any equipment or other assets purchased by Orasomal and/or Elan which
         are funded by the Company shall belong to the Company. In the event
         that such equipment or assets are purchased, the Parties shall conclude
         the appropriate arrangements as regards marking of goods, insurance and
         bailment provisions.

                                    CLAUSE 9

                            EXPLOITATION OF PRODUCTS

9.1      The Company will have [****] and in any Products subject to the


**** REPRESENTS MATERIAL REACTED PURSUANT TO A REQUEST 
FOR CONFIDENTIAL TREATMENT PURSUANT TO RULE 24B-2 UNDER 
THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED.







                                       13
<PAGE>   14


         other terms of this Agreement. [****]. It may be necessary to file a
         regulatory application and perform clinical testing in more than one
         country. The conduct of such clinical trials and the obtaining of
         regulatory approvals shall be regulated in accordance with arrangements
         agreed upon by the Management Committee.

9.2      The Management Committee shall review the research and development
         programs on a regular basis to decide, inter alia, whether one or more
         of such programs should continue, be terminated, or continue as
         modified. Any Party may call upon the Management Committee of the
         Company to review termination of the research and development program
         for a Product.

9.3.     In the event that (i) [****], and (ii) an [****] shall negotiate in
         good faith whether or not [****] shall be entitled [****], as the case
         may be, in relation to [****] and such [****], if any, [****], which
         has been [****], and if so upon what terms. In determining whether
         [****] shall be [****], the parties shall take into account whether or
         not the said [****].

9.4      The strategy for the registration and the commercialization of the
         Products shall be determined by the Management Committee.

9.5      Subject to contractual constraints, in the event that [****], as the
         case may be, (the "[****]") proposes to [****], or has [****] pursuant
         to [****], from a [****], and such [****] relating to [****] (a
         "[****]"), the [****]shall, for so long as [****], or may at its
         election, if the [****], disclose such details as are required to
         [****]. Subject to contractual constraints, the Company shall [****]
         (the "[****]") to [****] (as is appropriate) [****]


**** REPRESENTS MATERIAL REACTED PURSUANT TO A REQUEST 
FOR CONFIDENTIAL TREATMENT PURSUANT TO RULE 24B-2 UNDER 
THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED.





                                       14
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         [****]from the [****] (or [****]from the [****]). The [****]shall on
         [****]promptly and exclusively [****]for a period of [****]unless the
         Company gives [****] that it [****] in question. The terms for the
         [****] shall be upon terms to be [****] in good faith, including terms
         covering the [****] by the Company for any payments [****]to an
         [****]in respect of [****]

9.6.     In the event that the Company [****] (or subsequently discontinues
         [****]), the [****] shall thereafter be entitled [****]with [****]
         and/or to [****].

9.7.     In the event that one Participant determines not to fund any amounts
         required (as approved by the Elan Director and the Endorex Director in
         the Company Budget) to develop and commercialize the Elan Technology or
         the Orasomal Technology, or products based thereon, [****], as provided
         in the Company's approved budgets, the [****] (a) [****] or (b) [****].
         Subsequent to such an event, [****] (the "Revised Interest"). The
         [****]. In no event shall such [****], if any, cause [****].

9.8.     In the event that (a) one Participant determines not to fund any
         amounts required to develop and commercialize a particular product
         based on the Elan Technology or Orasomal Technology or project based
         thereon, as opposed to generally failing to fund as described under
         Section 9.7, above, and (b) the other Participant desires to fund such
         product or project, [****]

**** REPRESENTS MATERIAL REACTED PURSUANT TO A REQUEST 
FOR CONFIDENTIAL TREATMENT PURSUANT TO RULE 24B-2 UNDER 
THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED.









                                       15
<PAGE>   16


         [****].

                                    CLAUSE 10

                        TECHNICAL SERVICES AND ASSISTANCE

10.1     [****], the Company shall contract with Orasomal, Endorex or Elan, as
         the case may be, to perform such other services as the Company may
         require, other than those specifically dealt with in the Orasomal
         License Agreement and the Elan License Agreement. In determining which
         Party should provide such services, the Management Committee shall take
         into account the respective infrastructure and experience of Elan,
         Endorex and Orasomal. Nothing in this Clause 10.1 shall be deemed to
         prohibit the Company from contracting such required services from an
         Independent Third Party in the event that [****].

10.2     The Company shall, if appropriate, conclude an administrative support
         agreement with Elan and Orasomal on such terms as the parties thereto
         shall in good faith negotiate. The management services required
         include, but are not limited to, one or more of the following
         management services which shall be requested by the Company:

         (i)   accounting, financial and other services;

         (ii)  tax services;

         (iii) insurance services;

         (iv)  human resources services;

         (v)   legal and company secretarial services;

         (vi)  patent and related intellectual property services; and

         (vii) all such other services consistent with and of the same type as
         those services to be provided pursuant to this Agreement, as may be
         required.

10.3     If Elan or Orasomal so requires, Orasomal or Elan, as the case may be,
         shall receive, at times and for periods mutually acceptable to the
         parties, employees of the other party (such employees to be acceptable
         to the receiving party in the matter of qualification and competence)
         for instruction in respect of the Elan Technology or the Orasomal
         Technology,

**** REPRESENTS MATERIAL REACTED PURSUANT TO A REQUEST 
FOR CONFIDENTIAL TREATMENT PURSUANT TO RULE 24B-2 UNDER 
THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED.






                                       16
<PAGE>   17


         as the case may be, as is necessary to further the Research and
         Development Programs.

10.4     The employees received by Elan or Orasomal, as the case may be, shall
         be subject to obligations of confidentiality no less stringent than
         those set out in Clause 19 and such employees shall observe the rules,
         regulations and systems adopted by the Party receiving the said
         employees for its own employees or visitors.

                                    CLAUSE 11

                               SUPPLY ARRANGEMENTS

11.1     [****] and similarly-situated companies; provided, further, that in the
         event that the Company shall [****], and [****], the Company shall
         [****], so long as such [****] is not a [****].

                                    CLAUSE 12

                      PROCEEDINGS OF DIRECTORS AND CHAIRMAN

12.1     The board of directors of the Company shall consist of three members as
         follows: the Elan Director, the Endorex Director and an independent
         director, mutually satisfactory in fitness of character and business
         and industry experience, to each of Elan and Endorex.

12.2     As of the date hereof, the Endorex Director shall be the chairman of
         the Company's board of directors.

12.3     The Chairman appointed under Clause 12.2 shall retire as Chairman at
         the first Annual Meeting of the Company to be held no later than June
         30, 1999. Thereafter, each Participant, beginning with Elan, shall have
         the right, exercisable alternatively, of nominating one of the
         Directors to be Chairman of the Company for a period of one year. The
         Chairman shall hold office until the termination of the next Annual
         Meeting following his appointment. If the Chairman is unable to attend
         any meeting of the board, the Director of the same designation shall be
         entitled to appoint another director to act as


**** REPRESENTS MATERIAL REACTED PURSUANT TO A REQUEST 
FOR CONFIDENTIAL TREATMENT PURSUANT TO RULE 24B-2 UNDER 
THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED.







                                       17
<PAGE>   18


         Chairman in his place at the meeting.

                                    CLAUSE 13

                    MATTERS REQUIRING PARTICIPANTS' APPROVAL

13.1     In consideration of Orasomal and Elan agreeing to enter into the
         License Agreements, the Parties hereby agree that neither the Company
         nor any Subsidiary of the Company shall, without the prior approval of
         each of the Participants:

         (i)      engage in any activity other than the Business;

         (ii)     sell the principal assets, undertaking or Business of the
                  Company;

         (iii)    borrow any sum (except from the Company's bankers in the
                  ordinary and proper course of the Business) in excess of a
                  maximum aggregate sum outstanding at any time of [****];

         (iv)     make any loan or advance or give any credit (other than normal
                  trade credit) in excess of [****] to any Person;

         (v)      give any guarantee or indemnity to secure the liabilities or
                  obligations of any Party other than those which it is usual to
                  give in the ordinary course of a business similar to the
                  Business;

         (vi)     enter into any contract, arrangement or commitment involving
                  expenditure on capital account or the realization of capital
                  assets if the amount or the aggregate amount of such
                  expenditure or realisation by the Company and all of the
                  Subsidiaries of the Company would exceed [****] in any one
                  year or in relation to any one project, and for the purpose of
                  this paragraph the aggregate amount payable under any
                  agreement for hire, hire purchase or purchase on credit sale
                  or conditional sale terms shall be deemed to be capital
                  expenditure incurred in the year in which such agreement is
                  entered into;

         (vii)    issue any unissued Shares or create or issue any new shares,
                  or alter any rights attaching to the Company's capital stock;

         (viii)   create, acquire or dispose of any Subsidiary or of any shares
                  in any Subsidiary;

**** REPRESENTS MATERIAL REACTED PURSUANT TO A REQUEST 
FOR CONFIDENTIAL TREATMENT PURSUANT TO RULE 24B-2 UNDER 
THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED.








                                       18
<PAGE>   19



         (ix)     enter into any partnership or profit sharing agreement with
                  any Person other than arrangements with trade representatives
                  and similar Persons in the ordinary course of business;

         (x)      issue any debentures or other securities convertible into
                  shares or debentures or any share warrants or any options in
                  respect of Shares;

         (xi)     acquire, purchase or subscribe for any shares, debentures,
                  mortgages or securities (or any interest therein) in any
                  company, trust or other Person;

         (xii)    adopt any employee benefit program or incentive schemes;

         (xiii)   engage any new employee of the Company at remuneration which
                  could exceed the rate of [****] per annum;

         (xiv)    pay any remuneration to Directors by virtue of holding such
                  office;

         (xv)     licence or sub-licence any of the Elan Technology, Orasomal
                  Technology, Company Program Technology, Elan Program
                  Technology or Orasomal Program Technology;

         (xvi)    amend or vary the terms of the Orasomal Licence Agreement or
                  the Elan Licence Agreement; and

         (xvii)   to undertake a Research and Development Program;

         (xviii)  file an amendment to the Company's certificate of
                  incorporation or alter the by-laws;

         (xix)    alter the number of the Company's directors.

                                    CLAUSE 14

                          THE BUSINESS PLAN AND REVIEWS

14.1     The Directors shall meet as soon as reasonably practicable after the
         date hereof and in any event within 30 days of signing this Agreement,
         to agree and approve the Business Plan and operating budget for the
         initial Financial Year. Thereafter the Directors shall reach

**** REPRESENTS MATERIAL REACTED PURSUANT TO A REQUEST 
FOR CONFIDENTIAL TREATMENT PURSUANT TO RULE 24B-2 UNDER 
THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED.







                                       19
<PAGE>   20


         agreement on each subsequent Financial Year operating budget at least
         30 days prior to the commencement of each respective Financial Year.

14.2     The Participants agree that the Management Committee shall submit to
         the Directors, on 15th February, 15th May, 15th August and 15th
         November, or as soon as reasonably practicable thereafter in each
         Financial Year, a report on the performance of the business activities
         of the Company and the Directors shall hold such meeting as may be
         necessary to review the performance of the Company against the Business
         Plan for the relevant year of trading.

                                    CLAUSE 15

                        TRANSFER OF OR PLEDGING OF SHARES

15.1     Neither EIS nor Endorex shall, directly or indirectly, sell, assign,
         pledge, encumber, hypothecate or otherwise transfer (in each case, a
         "Transfer") any Shares except in accordance with this Agreement. The
         Company shall not, and shall not permit any transfer agent or registrar
         for the Shares to, transfer upon the books of the Company any Shares
         from any stockholder to any Transferee (as hereinafter defined), in any
         manner, except in accordance with this Agreement, and any purported
         transfer not in compliance with this Agreement shall be void.

15.2     In the event a stockholder shall Transfer any Shares (including any
         such Shares acquired after the date hereof) to any Person (all Persons
         acquiring Shares from a stockholder, as described in this Clause 15,
         regardless of the method of transfer, shall be referred to collectively
         as "Transferees" and individually as a "Transferee") in accordance with
         this Agreement, such Shares shall nonetheless bear legends as provided
         in the Company Subscription Agreement of; provided, however, that the
         provisions of this Clause 15.2 shall not apply in respect of a sale of
         Shares in a registered public offering under the Securities Act of
         1933, as amended (the "SECURITIES ACT") or pursuant to Rule 144, or any
         successor rule under the Securities Act.

15.3     Notwithstanding any other provision of this Agreement, no stockholder
         shall, directly or indirectly, Transfer any Shares at any time if such
         action would constitute a violation of any federal or state securities
         or blue sky laws or a breach of the conditions to any exemption from
         registration of Shares under any such laws or a breach of any
         undertaking or agreement of such stockholder entered into pursuant to
         such laws or in connection with obtaining an exemption thereunder.

14.4     No stockholder shall effect a Transfer of Shares unless such Transferee
         shall agree to be






                                       20

<PAGE>   21


bound by this Agreement, and shall further agree to permit EIS or Endorex, as
         applicable, to act on their behalf in accordance with the provisions of
         this Agreement.

                                    CLAUSE 16

                                    DISPUTES

16.1     Disputes among the members of the R&D Committee (each such event, a
         "Program Dispute") which cannot be resolved by consensus shall be
         forwarded to the Management Committee for discussion and resolution, by
         filing of a notice of dispute from the R&D Committee to the Management
         Committee.

16.2     In the event that the members of the Management Committee, after
         reasonable consideration, cannot resolve a Program Dispute within 10
         days of receipt of a notice as described in Clause 16.1, such Program
         Dispute shall be forwarded to the board of directors for discussion and
         resolution, by submission of a letter from the Management Committee to
         the Chairman of the board of directors detailing the issue in dispute
         and the position of each party in relation thereto.

16.3     Disputes under this Agreement among members of the Management Committee
         (each such event a "Management Dispute"; together with a Program
         Dispute, a "Dispute"), which cannot be resolved by consensus shall also
         be forwarded to the board of directors for discussion and resolution,
         by submission of a letter from the Management Committee to the Chairman
         of the board of directors detailing the issue in dispute and the
         position of each party in relation thereto.

16.4     In the event of submission of a letter accordance with Clause 16.2 or
         16.3, the members of the board of directors shall convene in person or
         via telephone conference within 10 days in order to discuss the
         Dispute. After discussion and consideration, resolution of the Dispute
         shall be decided by a majority vote of the board of directors.

16.5     In the event that the board is unable to resolve a Dispute, the
         Chairman shall refer the matter to an expert (the "Expert"), mutually
         acceptable to the Parties; or in the event that the Parties cannot so
         agree, a Panel (as defined below) in accordance with the procedures for
         such Panel as set forth below in Clause 16.9 below. In each case, the
         Expert shall be selected having regard to his suitability to determine
         the particular dispute or difference on which he is being requested to
         determine. The Expert shall afford each Party a reasonable opportunity,
         in writing or orally, to state its respective reasons in support of
         such contentions as each Party may wish to make relative to the matters
         under consideration. The Expert shall give notice in writing of his
         determination to the Parties within such time as may be stipulated in
         his terms of appointment, or in the absence of such stipulation as








                                       21
<PAGE>   22


         soon as practicable, but in any event within three weeks from the
         reference of the Program Dispute to him.

16.6     The fees of each Expert shall be shared equally between the Parties.
         The Expert shall be entitled to inspect and examine all documentation
         and any other material which he may consider to be relevant to the
         Dispute.

16.7     Any [****] shall [****] on [****]; provided, however, that any [****]
         of a [****] based upon [****] shall be [****].

16.8     In no event shall the referral of a Dispute to the Expert supercede the
         requirement, as described in Section 2.6 of the Company Subscription
         Agreement or the provisions of Clause 12 of this Agreement, that both
         the Elan Director and Endorex Director, and where applicable the
         Participants, approve certain business decisions.

16.9     In the event that the board of directors is unable to agree upon an
         Expert, a panel of experts (the "Panel") shall be appointed as follows.
         The Elan Director and the Endorex Director shall each select one
         Expert, each in their sole discretion, using good faith to select an
         Expert with appropriate qualifications. Within 20 days of the
         appointment of such Experts, the two Experts so selected shall appoint
         a third Expert from a list of arbitrators provided by the American
         Arbitration Association (the "AAA"); provided, that in the event that
         the two selected Experts are unable to agree upon such third Expert
         within 20 days, any director of the Company may request the AAA to
         appoint such third Expert.

16.10    Notwithstanding Clause 16.9, each of the Elan Director and the Endorex
         Director shall be prohibited from selecting as an Expert any person who
         has or has had a material interest or relationship (i.e., through
         employment, stock ownership, business affiliation or otherwise) with a
         Party or any of its directors, officers or employees. Service as an
         Expert hereunder shall not constitute such a material interest or
         relationship in connection with the resolution of subsequent Disputes.

                                    CLAUSE 17

                                   TERMINATION

17.1     The Company shall continue to operate and exist for so long as its
         stockholders shall determine, and this Agreement and the Company
         Subscription Agreement shall govern such operation and existence until
         this Agreement shall be terminated in accordance with this


**** REPRESENTS MATERIAL REACTED PURSUANT TO A REQUEST 
FOR CONFIDENTIAL TREATMENT PURSUANT TO RULE 24B-2 UNDER 
THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED.







                                       22
<PAGE>   23


         Clause 17 (the "Term").

17.2     For the purpose of this Clause 17, a "Relevant Event" is committed by
         Elan or Endorex if:

         (i)      it commits a material breach of its obligations under this
                  Agreement and fails to remedy it within 60 days of being
                  specifically required in writing to do so by the other
                  Participant; provided, however, that if the breaching
                  Participant has proposed a course of action to rectify the
                  breach and is acting in good faith to rectify same but has not
                  cured the breach by the 60th day, such rectifying period shall
                  be extended by an amount of time as is reasonably necessary to
                  permit the breach to be rectified;

         (ii)     it ceases, wholly or substantially, to carry on its business,
                  other than for the purpose of a reorganization, without the
                  prior written consent of the other Participant (such consent
                  not to be unreasonably withheld);

         (iii)    the voluntary appointment of a liquidator, receiver,
                  administrator, examiner, trustee or similar officer over all
                  or substantially all of its assets under the laws of such
                  Participant's state or country of incorporation;

         (iv)     an application or petition for bankruptcy, corporate
                  reorganization, composition, administration, examination,
                  arrangement or any other procedure similar to any of the
                  foregoing under the laws of such Participant's state or
                  country of incorporation, is filed, and is not discharged
                  within 90 days.

17.2     If either Participant commits a Relevant Event, the other Participant
         shall have in addition to all other legal and equitable rights and
         remedies hereunder, the right to terminate this Agreement upon [****]
         written notice; provided, that such written notice be given within
         [****] following the date that the other Participant becomes aware of
         the Relevant Event.

17.3     In the event that (a) a [****] shall [****] or more of the voting stock
         of Endorex, Orasomal or the Company, or [****] their management or
         business, or (b) any other person or entity shall [****] or more of the
         voting stock of Endorex, Orasomal or the Company, or otherwise [****]
         (or binding agreement in respect thereof) with any of such entities,
         [****], at the option of Elan, [****], so long as Elan shall [****]
         within [****] of the such event; provided, that the foregoing shall not
         apply in relation to [****] or [****] (each as described in the Company
         Subscription Agreement).

17.4     If, at any time, the Participants agree that the Company should be
         wound up or liquidated,

**** REPRESENTS MATERIAL REACTED PURSUANT TO A REQUEST 
FOR CONFIDENTIAL TREATMENT PURSUANT TO RULE 24B-2 UNDER 
THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED.






                                       23
<PAGE>   24


         the Parties shall ensure that, after all of the debts of the Company
         have been satisfied, the [****], as follows:

         (i)    [****]; and
         (ii)   [****]; and
         (iii)  [****], based upon [****];

         and/or the Parties further agree to negotiate in good faith, the terms
         for other arrangements, including cross licences, as may be necessary
         to enable Orasomal and Elan to exploit the technology of the other
         Party for the Field.

17.5     The Parties agree that in the event that Elan shall exercise its right
         [****] of the outstanding Shares, pursuant to its rights under the Elan
         Option:

         (i)      the Orasomal Licence Agreement shall continue in full force
                  and effect;

         (ii)     the licence, if any, granted by the Company to Orasomal to use
                  the Orasomal Program Technology outside the Field pursuant to
                  this Agreement shall continue; and

         (iii)    Orasomal shall remain entitled to a licence to the Company
                  Program Technology outside the Field on terms to be agreed. If
                  the Parties cannot agree such terms, the Parties shall refer
                  the dispute to an Expert for resolution, as provided in Clause
                  16 hereof.

                                    CLAUSE 18

                              ADDITIONAL FINANCING

18.1     Each Participant shall use its reasonable efforts to procure that the
         requirements of the Company for working capital to finance the Business
         are provided proportionately to the shareholding held by the
         Participants (in the case of Elan, by its Affiliate EIS) in a manner to
         be agreed by the Participants. For the avoidance of doubt, the
         Participants agree that, [****], there is no [****] to contribute
         [****].

18.2     Each of the Participants agree that to the extent that the Company's
         assets are insufficient to repay the financial assistance made
         available by each of the Participants to the Company,

**** REPRESENTS MATERIAL REACTED PURSUANT TO A REQUEST 
FOR CONFIDENTIAL TREATMENT PURSUANT TO RULE 24B-2 UNDER 
THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED.







                                       24
<PAGE>   25


         whether directly or indirectly, in the event that the Company is wound
         up or goes into liquidation then any deficiency shall be borne by them
         in equal proportions.


18.3     If it is not possible to obtain sufficient financial assistance from
         the Participants, the Company can obtain borrowings or other funding
         from financial institutions and other similar sources on the most
         favourable terms reasonably obtainable as to interest, repayment and
         security.

                                    CLAUSE 19

                                 CONFIDENTIALITY

19.1     Each of the Parties acknowledge that it may be necessary, from time to
         time, to disclose to one another confidential and proprietary
         information, including without limitation, inventions, the
         Technologies, the Program Technologies, Improvements and the Patents
         relating thereto, works of authorship, trade secrets, specifications,
         designs, data, Know-How and other information, relating to the Field,
         [****], the MIT Agreement (as each is defined in, respectively, the
         Elan License Agreement and the Orasomal License Agreement), the terms
         of the various agreements between the Parties, the Products, processes,
         and services, of the disclosing Party ("CONFIDENTIAL INFORMATION").

         Confidential Information shall not be deemed to include:

         (i)      information that is in the public domain;

         (ii)     information which is made public by the disclosing Party;

         (iii)    information which is independently developed by a Party
                  without the aid or application of the Confidential
                  Information;

         (iv)     information that is published or otherwise becomes part of the
                  public domain without any disclosure by a Party, or on the
                  part of a Participant's directors, officers, agents,
                  representatives or employees;

         (v)      information that becomes available to a Party on a
                  non-confidential basis, whether directly or indirectly, from a
                  source other than another Party, which source, to the best of
                  the receiving Party's knowledge, did not acquire this
                  information on a

**** REPRESENTS MATERIAL REACTED PURSUANT TO A REQUEST 
FOR CONFIDENTIAL TREATMENT PURSUANT TO RULE 24B-2 UNDER 
THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED.







                                       25
<PAGE>   26


         confidential basis; or

         (vi)     information which the receiving Party is required to disclose
                  pursuant to:

                  (A)      a valid order of a court or other governmental body
                           or any political subdivision thereof or otherwise
                           required by law; or

                  (B)      other requirement of law; provided that if the
         receiving Party becomes legally required to disclose any confidential
         information, the receiving Party shall give the disclosing Party prompt
         notice of such fact so that the disclosing Party may obtain a
         protective order or other appropriate remedy concerning any such
         disclosure. The receiving Party shall fully co-operate with the
         disclosing Party in connection with the disclosing Party's efforts to
         obtain any such order or other remedy. If any such order or other
         remedy does not fully preclude disclosure, the receiving Party shall
         make such disclosure only to the extent that such disclosure is legally
         required.

19.2     Any Confidential Information revealed by a Party to another Party shall
         be used by the receiving Party exclusively for the purpose of
         fulfilling the receiving Party's obligations under this Agreement and
         for no other purpose.

19.3     Each of the Parties agrees to disclose Confidential Information of
         another Party only to those employees, representatives and agents
         requiring knowledge thereof in connection with their duties directly
         related to the fulfilling of the Party's obligations under this
         Agreement. Each of the Parties further agrees to inform all such
         employees, representatives and agents of the terms and provisions of
         this Agreement and their duties hereunder and to obtain their consent
         hereto as a condition of receiving Confidential Information. Each of
         the Parties agrees that it will exercise the same degree of care, but
         in no event less than a reasonable degree, and protection to preserve
         the proprietary and confidential nature of the Confidential Information
         disclosed by a Participant, as the receiving Party would exercise to
         preserve its own proprietary and confidential information. Each of the
         Parties agrees that it will, upon request of a Party, return all
         documents and any copies thereof containing Confidential Information
         belonging to or disclosed by, such Party.

19.4     Notwithstanding the above, each Party may use or disclose confidential
         information disclosed to it by another Party to the extent such use or
         disclosure is reasonably necessary in filing or prosecuting patent
         applications, prosecuting or defending litigation, complying with
         patent applications, prosecuting or defending litigation, complying
         with applicable governmental regulations or otherwise submitting
         information to tax or other governmental authorities, conducting
         clinical trials, or making a permitted sub-license or otherwise
         exercising rights hereunder; provided, that if a Party is required to
         make any such disclosure of another Party's confidential information,
         other than pursuant to a confidentiality





                                       26
<PAGE>   27


         agreement, such disclosing Party shall inform the other Party thereof,
         and allow such other Party to participate in the disclosure process for
         the purpose of generally limiting, to the extent possible, such
         disclosure.

19.5     The provisions relating to confidentiality in this Clause 19 shall
         remain in effect during the Term, and for a period of [****] following
         the expiration or earlier termination of this Agreement.

19.6.    The Parties agree that the obligations of this Clause 19 are necessary
         and reasonable in order to protect the Parties' respective businesses,
         and each Party expressly agrees that monetary damages would be
         inadequate to compensate a Party for any breach by another Party of its
         covenants and agreements set forth herein. Accordingly, the Parties
         agree and acknowledge that any such violation or threatened violation
         will cause irreparable injury to a Party and that, in addition to any
         other remedies that may be available, in law and equity or otherwise, a
         Party shall be entitled to obtain injunctive relief against the
         threatened breach of the provisions of this Clause 19, or a
         continuation of any such breach by another Party, specific performance
         and other equitable relief to redress such breach together with its
         damages and reasonable counsel fees and expenses to enforce its rights
         hereunder, without the necessity of proving actual or express damages.

                                    CLAUSE 20

                              PARTICIPANTS' CONSENT

20.1     Where this Agreement provides that any particular transaction or matter
         requires the consent, approval or agreement of any Participant, such
         consent, approval or agreement may be given subject to such terms and
         conditions as that Participant may impose and to which the other
         Participant shall agree and any breach of such terms and conditions by
         any Persons subject thereto shall ipso facto be deemed to be a breach
         of the terms of this Agreement.

                                    CLAUSE 21

                            PARTIES AND COMPANY BOUND

21.1     The Company undertakes with each of the Parties to be bound by and
         comply with the terms and conditions of this Agreement insofar as the
         same relate to the Company.

21.2     Each Party undertakes with the others to exercise its part in relation
         to the Company so as to

**** REPRESENTS MATERIAL REACTED PURSUANT TO A REQUEST 
FOR CONFIDENTIAL TREATMENT PURSUANT TO RULE 24B-2 UNDER 
THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED.






                                       27
<PAGE>   28


         ensure that the Company fully and promptly observes, performs and
         complies with its obligations under this Agreement.

                                    CLAUSE 22

                                      COSTS

22.1     Each Party shall bear its own legal and other costs incurred in
         relation to preparing and concluding this Agreement and the related
         agreements and other documents.

22.2     All costs, legal fees, registration fees and other expenses, including
         the costs and expenses incurred in relation to the incorporation of the
         Company, shall be borne by the Company.

                                    CLAUSE 23

                                     GENERAL

23.1     GOOD FAITH

         Each of the Parties hereto undertakes with the others to do all things
         reasonably within its power which are necessary or desirable to give
         effect to the spirit and intent of this Agreement.

23.2     FURTHER ASSURANCE

         The Parties hereto shall use their respective reasonable efforts to
         procure that any necessary third party shall do, execute and perform
         all such further deeds, documents, assurances, acts and things as any
         of the Parties hereto may reasonably require by notice in writing to
         the others to carry the provisions of this Agreement into full force
         and effect; including, without limitation, the execution of any
         documents required to ensure the assignment of the Technologies, as
         described in Clause 6.1. In addition, each of Elan and Endorex shall
         cooperate and make reasonably available to the Company (including its
         authorized agents and representatives) all assistance reasonably
         necessary or appropriate to enable the Company to prepare, file,
         prosecute and maintain Patents or other Intellectual Property Rights
         related to the Technologies or the Company Program Technology,
         throughout the Territory.

23.3     NO REPRESENTATION

         Each of the Parties hereto hereby acknowledges that in entering into 
         this Agreement it has








                                       28
<PAGE>   29


         not relied on any representation or warranty save as expressly set out
         herein or in any document referred to herein.

23.4     EXERCISE OF POWERS

         Where either Participant is required under this Agreement to exercise
         its powers in relation to the Company to procure a particular matter or
         thing, such obligation shall be deemed to include an obligation to
         exercise its powers both as a Participant and as a Director (where
         applicable) of the Company and to procure that any Director appointed
         by it (whether alone or jointly with any other Person) shall procure
         such matter or thing.

23.5     FORCE MAJEURE

         Neither Party to this Agreement shall be liable for delay in the
         performance of any of its obligations hereunder if such delay results
         from causes beyond its reasonable control, including, without
         limitation, acts of God, fires, strikes, acts of war, or intervention
         of any relevant government authority, but any such delay or failure
         shall be remedied by such Party as soon as practicable.

23.6     RELATIONSHIP OF THE PARTICIPANTS

         Nothing contained in this Agreement is intended or is to be construed
         to constitute Elan and Endorex as partners, or Elan as an employee of
         Endorex, or Endorex as an employee of Elan. No Party hereto shall have
         any express or implied right or authority to assume or create any
         obligations on behalf of or in the name of another Party or to bind
         another Party to any contract, agreement or undertaking with any third
         party.

23.7     COUNTERPARTS

         This Agreement may be executed in any number of counterparts, each of
         which when so executed shall be deemed to be an original and all of
         which when taken together shall constitute this Agreement.

23.8     NOTICES

         Any notice to be given under this Agreement shall be sent in writing in
         English by registered mail, airmail, reputable courier or recorded
         delivery post, or telecopied (with a confirmation copy promptly sent by
         mail) to:

         -  IF TO ELAN:        Elan Corporation, plc







                                       29
<PAGE>   30



                                Lincoln House
                                Lincoln Place
                                Dublin 2, Ireland
                                Telecopier: 011-353-1-662-4960
                                Attention:    Vice President & General Counsel
                                              Elan Pharmaceutical Technologies

         with a copy to:        Brock Fensterstock Silverstein & McAuliffe LLC
                                153 East 53rd Street
                                56th Floor
                                New York, New York  10022
                                Telecopier: (212) 371-5500
                                Attention: David Robbins

         -  IF TO ENDOREX:      Endorex Corp.
                                900 North Shore Drive
                                Lake Buff, Illinois  60044
                                Telecopier: 847-604-8570
                                Attention:    President

         -  IF TO ORASOMAL:     Orasomal Technologies, Inc.
                                900 North Shore Drive
                                Lake Buff, Illinois  60044
                                Telecopier: 847-604-8570
                                Attention:    President








                                       30
<PAGE>   31


         in the case of Endorex and Orasomal, with a copy to:

                                Brobeck Phleger & Harrison LLP
                                1633 Broadway
                                New York, New York 10019
                                Telecopier: (212) 586-7878
                                Attention: Richard Plumridge

         -  IF TO THE COMPANY:  Endorex Vaccine Delivery Technologies, Inc.
                                900 North Shore Drive
                                Lake Buff, Illinois  60044
                                Telecopier: 847-604-8570
                                Attention:     President

         with a copy to the non-notifying Parties; or to such other address(es)
         as may from time to time be notified by any Party to the others
         hereunder.

         Any notice sent by mail shall be deemed to have been delivered within
         seven working days after dispatch, any notice sent by reputable courier
         shall be deemed to have been delivered within two working days after
         dispatch and any notice sent by telecopy shall be deemed to have been
         delivered within 24 hours of the time of the dispatch. Notices of
         change of address shall be effective upon receipt.

23.9     GOVERNING LAW AND DISPUTES

         This Agreement shall be governed by and construed in accordance with
         the laws of New York and the Parties agree to submit to the
         jurisdiction of the courts of New York for the resolution of disputes
         hereunder, which the Parties have not otherwise agreed should be
         subject to the binding determination of an Expert or Panel, pursuant to
         the terms of this Agreement.

23.10    SEVERABILITY

         If any provision in this Agreement is agreed by the Parties to be,
         deemed to be or becomes invalid, illegal, void or unenforceable under
         any law that is applicable hereto, (i) such provision will be deemed
         amended to conform to applicable laws so as to be valid and enforceable
         or, if it cannot be so amended without materially altering the
         intention of the Parties, it will be deleted, with effect from the date
         of such agreement or such earlier date as the Parties may agree, and
         (ii) the validity, legality and enforceability of the remaining
         provisions of this Agreement shall not be impaired or affected in any
         way.







                                       31
<PAGE>   32


23.11    AMENDMENTS

         No amendment, modification or addition hereto shall be effective or
         binding on any Party unless set forth in writing and executed by a duly
         authorised representative of all Parties.

23.12    WAIVER

         No waiver of any right under this Agreement shall be deemed effective
         unless contained in a written document signed by the Party charged with
         such waiver, and no waiver of any breach or failure to perform shall be
         deemed to be a waiver of any future breach or failure to perform or of
         any other right arising under this Agreement.


23.13    ASSIGNMENT

         [****].

23.14    NO EFFECT ON OTHER AGREEMENTS

         No provision of this Agreement shall be construed so as to negate,
         modify or affect in any way the provisions of any other agreement
         between any of the Parties unless specifically referred to, and solely
         to the extent provided, in any such other agreement. In the event of a
         conflict between the provisions of this Agreement and the provisions of
         the License Agreements or the Company Subscription Agreement, the terms
         of this Agreement shall prevail

23.15    SUCCESSORS

         This Agreement shall be binding upon and enure to the benefit of the
         Parties hereto, their successors and permitted assigns.



**** REPRESENTS MATERIAL REACTED PURSUANT TO A REQUEST 
FOR CONFIDENTIAL TREATMENT PURSUANT TO RULE 24B-2 UNDER 
THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED.










                                      32
<PAGE>   33


        IN WITNESS whereof, the Parties have executed this Joint Development &
Operating Agreement on the date first set forth above.


ELAN CORPORATION, PLC


By:   /s/ Thomas G. Lynch
     -------------------------------
           Name:  Thomas G. Lynch
           Title: Director


ELAN INTERNATIONAL SERVICES, LTD.


By:   /s/ Kevin Insley
     -------------------------------
           Name:  Kevin Insley
           Title: President & CEO


ENDOREX CORP.


By:   /s/ Michael S. Rosen
     -------------------------------
           Name:  Michael S. Rosen
           Title: President/CEO


ORASOMAL TECHNOLOGIES, INC.


By:   /s/ Michael S. Rosen
     -------------------------------
           Name:  Michael S. Rosen
           Title: President/CEO


ENDOREX VACCINE DELIVERY TECHNOLGIES, INC.


By:   /s/ Michael S. Rosen 
     -------------------------------
           Name:  Michael S. Rosen
           Title: President/CEO











                                      33




<PAGE>   34


                                   SCHEDULE 1


                             ELAN LICENSE AGREEMENT

























<PAGE>   35


                                   SCHEDULE 2

                           ORASOMAL LICENSE AGREEMENT


































<PAGE>   36




                                   SCHEDULE 3
                                LISTED COMPANIES


[*****]

(AS MAY BE AMENDED WITH MUTUAL AGREEMENT OF ALL THE PARTIES IN WRITING FROM TIME
TO TIME)





**** REPRESENTS MATERIAL REACTED PURSUANT TO A REQUEST 
FOR CONFIDENTIAL TREATMENT PURSUANT TO RULE 24B-2 UNDER 
THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED.


































<PAGE>   1


                                                                     EX. 10.17
                                    CONFIDENTIAL TREATMENT HAS BEEN SOUGHT FOR
                               PORTIONS OF THIS EXHIBIT PURSUANT TO RULE 24B-2
                         UNDER THE SECURITIES EXCHANGE AC TO 1934, AS AMENDED.


                          SECURITIES PURCHASE AGREEMENT

                  SECURITIES PURCHASE AGREEMENT dated as of January 21, 1998
between ENDOREX CORP., a Delaware corporation (the "Company"), and ELAN
INTERNATIONAL SERVICES, LTD., a Bermuda corporation ("EIS").


                                R E C I T A L S:

                  A. The Company desires to issue and sell to EIS, and EIS
desires to purchase from the Company, on the Closing Date (as defined below),
(i) 307,692 shares (the "Initial Common Stock") of the Company's common stock,
par value $.001 per share (the "Common Stock"), and (ii) a warrant to acquire an
aggregate of 230,770 shares (subject to adjustment) of Common Stock, in the form
attached hereto as Exhibit A (the "Warrant"), the Initial Common Stock and the
Warrant together to be sold for aggregate consideration of $2,000,000, and (iii)
80,100 shares of Series B Convertible Preferred Stock (the "Series B Preferred
Stock"; together with the Common Stock and the Warrant, the "Securities"), which
shall be issued to EIS pursuant to the Certificate of Designations in the form
attached hereto as Exhibit B (the "Certificate of Designations") for aggregate
consideration of $8,010,000, all to be paid by wire transfer of immediately
available funds by EIS to the Company on the Closing Date.

                  B. The Company and EIS have caused to be formed Endorex
Vaccine Delivery Technologies, Inc., a Delaware corporation ("Newco"), for the
purpose of researching, developing and commercializing certain technologies
relating to oral and muscosal vaccine delivery based on technology to be
licensed to Newco by affiliates of EIS and the Company. The initial stockholders
in Newco shall be the Company and EIS. The parties intend, as provided herein,
that the proceeds of the issuance of Series B Preferred Stock shall be applied
by the Company solely to fund the Company's initial investment in Newco.

                  C. The Company and EIS are executing and delivering on the
date hereof a Registration Rights Agreement in the form attached hereto as
Exhibit C (the "Registration Rights Agreement"; together with this Agreement,
the Securities, and each other document or instrument executed and delivered in
connection with the transactions contemplated hereby, including in connection
with the initial formation and capitalization of Newco, the "Transaction
Documents") in respect of the purchase of Initial Common Stock and the Common
Stock underlying the Series B Preferred Stock and the Warrant.








<PAGE>   2


                               A G R E E M E N T:

                  The parties agree as follows:

                  SECTION 1. Closings. (a) Time and Place. The closing of the
transactions contemplated hereby (the "Closing") shall occur no later than the
tenth day following receipt by the parties of notice of the expiration or
termination of the applicable HSR (as defined below) waiting period, if any (the
"Closing Date"), at the offices of counsel to EIS or such other place as the
parties may agree, but in any event, the Closing Date shall occur on or prior to
March 31, 1998. If the Closing Date shall not have occurred on or prior to such
date for any reason, either party shall have the right, upon written notice to
the other, to terminate this Agreement and the transactions contemplated hereby,
so long as such terminating party shall not be in material default hereunder.

                  (b) Issuance of Securities. At the Closing, (x) the Company
shall issue and sell to EIS, and EIS shall purchase from the Company the Initial
Common Stock and the Warrant, upon the terms and subject to the conditions set
forth herein, for an aggregate purchase price of $2,000,000, and (y) the Company
shall issue and sell to EIS, and EIS shall purchase from the Company the Series
B Preferred Stock, for an aggregate purchase price of $8,010,000.

                  (c) Delivery. At the Closing, EIS shall pay the purchase price
for the Initial Common Stock, the Warrant and the Series B Preferred Stock by
wire transfer of immediately available funds to an account or accounts
designated by the Company and the parties hereto shall execute and deliver to
each other, as applicable: (i) a certificate or certificates for the shares of
the Initial Common Stock; (ii) the Warrant; (iii) a certificate or certificates
for the shares of Series B Preferred Stock; (iv) certificates as to the
incumbency of the officers executing this Agreement and each of the other
documents or instruments executed in connection herewith; and (v) each of the
other documents or instruments executed in connection herewith. In addition, at
the Closing, the Company shall cause to be delivered to EIS an opinion of
counsel in form attached hereto as Exhibit D.

                  (e) Exemption from Registration. The Securities will be issued
under an exemption or exemptions from registration under the Securities Act of
1933, as amended; accordingly, the certificates evidencing the Securities shall,
upon issuance, contain the following legend:

                  THE SECURITIES REPRESENTED HEREBY HAVE NOT 
                  BEEN REGISTERED UNDER THE SECURITIES ACT OF 
                  1933 AND MAY NOT UNDER ANY CIRCUMSTANCES BE 
                  SOLD, TRANSFERRED OR OTHERWISE DISPOSED OF 
                  WITHOUT AN EFFECTIVE REGISTRATION 
                  STATEMENT FOR SUCH SECURITIES UNDER THE 
                  SECURITIES ACT OF 1933 AND ANY APPLICABLE
                  STATE SECURITIES LAWS OR AN OPINION OF






                                       2
<PAGE>   3


                  COUNSEL SATISFACTORY TO THE CORPORATION 
                  THAT REGISTRATION IS NOT REQUIRED UNDER SUCH 
                  ACT OR APPLICABLE STATE SECURITIES LAWS.

                  (f) Registration Rights Agreement. On the date hereof, the
Company and EIS are each executing and delivering the Registration Rights
Agreement, covering the shares of the Initial Common Stock, as well as any
Common Stock issuable upon conversion, exercise or exchange of any of the
Securities.

                  SECTION 2. Representations and Warranties of the Company. The
Company hereby represents on behalf of itself and, as applicable, its
subsidiaries and affiliates:

                  (a) Organization and Qualification. The Company is duly
organized, validly existing and in good standing under the laws of the State of
Delaware and has all requisite corporate power and authority to own and lease
its properties, to carry on its business as presently conducted and as proposed
to be conducted and to consummate the transactions contemplated hereby. The
Company is qualified and in good standing to do business in jurisdictions set
forth on Schedule 2(a), which constitute all of the jurisdictions in which the
nature of the business conducted or the property owned by it requires such
qualification, except where the failure to so qualify would not have a Material
Adverse Effect (as defined below) on the business, prospects, properties or
condition (financial or otherwise) of the Company.

                  (b) Capitalization. (i) The authorized capital stock of the
Company as of December 31, 1997 consisted of 50,000,000 shares of Common Stock,
of which 9,736,641 were issued and outstanding, and 500,000 shares of Preferred
Stock, of which 100,000 are designated as Series A Junior Participating
Preferred Stock, none of which were issued or outstanding.

                  (ii) Except as set forth in Schedule 2(b) and in the Company's
filings with the Securities and Exchange Commission (the "SEC Filings"), as of
the Closing Date there are no options, warrants or other rights outstanding to
purchase, subscribe for or otherwise acquire, or any securities convertible
into, any of the Company's authorized capital stock. Other than as set forth in
this Agreement and as described in Schedule 2(b), there are no agreements,
arrangements or understandings concerning the voting, acquisition or disposition
of any of the Company's outstanding securities to which the Company is a party
or of which it is otherwise aware, and, other than as set forth in Schedule 2(b)
or in the Registration Rights Agreement, there are no agreements to register any
of the Company's outstanding securities under the U.S. Federal securities laws.

                  (iii) All of the outstanding shares of capital stock of the
Company have been issued in accordance with applicable state and federal laws
and regulations governing the sale and purchase of securities, all of such
shares of have duly and validly issued and are fully paid and non-assessable,
and none of such shares carries preemptive or similar rights.

                  (c)   Authorization of Transaction Documents.  The Company has
full corporate







                                       3
<PAGE>   4


power and authority to execute and deliver this Agreement and each of the other
Transaction Documents, and to perform its obligations hereunder and thereunder.
Execution, delivery and performance by the Company of the Transaction Documents
(including the issuance and sale of the Securities) have been authorized by all
requisite corporate actions by the Company; and the Transaction Documents
(including the issuance and sale of the Securities) have been duly executed and
delivered by the Company are the valid and binding obligations of the Company,
enforceable against each in accordance with their respective terms, except as
limited by applicable bankruptcy, insolvency, reorganization, moratorium and
other laws of general application affecting the enforcement of creditors' rights
generally, and except as enforcement of rights to indemnity and contribution
hereunder and thereunder may be limited by U.S. Federal or state securities laws
or principles of public policy.

                  (d) No Conflicts. The execution, delivery and performance by
the Company of the Transaction Documents (including the issuance and sale of the
Securities), and compliance with the provisions thereof by the Company, will not
(i) violate any provision of applicable law, statute, rule or regulation
applicable to the Company or any ruling, writ, injunction, order, judgment or
decree of any court, arbitrator, administrative agency or other governmental
body applicable to the Company or any of their respective properties or assets
or (ii) conflict with or result in a breach of any of the terms, conditions or
provisions of, or constitute (with notice or lapse of time or both) a default
(or give rise to any right of termination, cancellation or acceleration) under,
or result in the creation of, any Encumbrance (as defined below) upon any of the
properties or assets of the Company under its Certificate of Incorporation, as
amended, its Certificate of Designations (in the form to be filed as provided
herein) or By-laws, or any material contract to which the Company is a party,
except where such violation, conflict or breach would not, individually or in
the aggregate, have a Material Adverse Effect on the Company (as used in
connection to either of them, a "Material Adverse Effect"). As used herein,
"Encumbrance" shall mean any liens, charges, encumbrances, equities, claims,
options, proxies, pledges, security interests, or other similar rights of any
nature, except for such conflicts, breaches or defaults which would not,
individually or in the aggregate, have a Material Adverse Effect.

                  (e) Approvals. Except as set forth on Schedule 2(e), no
material permit, authorization, consent or approval of or by, or any
notification of or filing with, any person or entity (governmental or otherwise)
is required in connection with the execution, delivery or performance of the
Transaction Documents (including the issuance and sale of the Securities) by the
Company or Newco. There is no approval of the Company's stockholders required
under applicable laws in connection with the execution and delivery the
Transaction Documents or the consummation of the transactions contemplated
thereby, including the filing of the Certificate of Designations and the
issuance of the Securities.

                  (f) Filings, Taxes and Financial Statements. (i) The Company
has filed its annual report on Form 10-K for the transition period ended
December 31, 1996 (the "Annual Report"), its related proxy materials and its
quarterly report on Form 10-Q for the quarter ended September 30, 1997 (the
"Quarterly Report") with the Securities and Exchange Commission and






                                       4
<PAGE>   5


any other required person or entity (governmental or otherwise) in a timely
manner and as otherwise required by applicable laws and regulations, including
the federal securities acts. The audited financial statements of the Company for
the transition period ended December 31, 1996 included in the Annual Report (the
"Audited Financial Statements"), and the Company's unaudited balance sheet for
the period ending September 30, 1997, together with the accompanying statements
of operations and cash flows including the notes thereto (the "September
Financial Statements"; collectively, with the Audited Financial Statements, the
"Financial Statements") are accurate and complete in all material respects and
fairly present the financial condition of the Company as at the dates thereof
and have been prepared in accordance with generally accepted accounting
principles applied on a consistent basis throughout the periods indicated
(except as may be otherwise indicated in such financial statements or the notes
thereto), subject, in the case of the September Financial Statements, to normal
year-end audit adjustments (which shall not be material in the aggregate) and
the absence of footnote disclosures.

                  (ii) The Company has filed in a timely manner all material
federal, state, local and foreign tax returns, reports and filings
(collectively, "Returns"), including income, franchise, property and other
taxes, and has paid or accrued the appropriate amounts reflected on such
Returns. None of the Returns have been audited or challenged, nor has the
Company received any notice of challenge nor have any of the amounts or other
data included in the Returns been challenged or reviewed by any governmental
authority.

                  (iii) Except as listed in Schedule 2(f), which sets forth a
true and accurate list and description of any such plans maintained or sponsored
by the Company or to which the Company is required to make contributions, the
Company does not maintain, sponsor, is not required to make contributions to or
otherwise have any liability with respect to any pension, profit sharing, thrift
or other retirement plan, employee stock ownership plan, deferred compensation,
stock ownership, stock purchase, performance share, bonus or other incentive
plan, severance plan, health or group insurance plan, welfare plan, or other
similar plan, agreement, policy or understanding (whether written or oral),
whether or not such plan is intended to be qualified under Section 401(a) of the
Code, within the meaning of Section 3(3) of the Employee Retirement Income
Security Act of 1974, as amended, which plan covers any employee or former
employee of the Company.

                  (g) Absence of Changes. Except as set forth on Schedule 2(g),
since September 30, 1997, there has not been (a) any material adverse change in
the business, properties, condition (financial or otherwise), operations or
prospects of the Company; (b) any damage, destruction or loss, whether or not
covered by insurance, materially and adversely affecting the business,
properties, condition (financial or otherwise), operations or prospects of the
Company; (c) any declaration, setting aside or payment of any dividend or other
distribution or payment (whether in cash, stock or property) in respect of the
capital stock of the Company, or any redemption or other acquisition of such
stock by the Company; (d) any disposal or lapse of any trade secret, invention,
patent, trademark, trademark registration, service mark, service mark
registration, copyright, copyright registration, or any application therefor or
filing in respect






                                       5
<PAGE>   6


thereof; (e) loss of the services of any of the key officers or key employees of
the Company; (f) any incurrence of or entry into any liability, mortgage, lien,
commitment or transaction, including without limitation, any borrowing (or
assumption or guarantee thereof) or guarantee of a third party's obligations, or
capital expenditure (or lease in the nature of a conditional purchase of capital
equipment) in excess of $50,000; or (g) any material change by the Company in
accounting methods or principles or (h) any change in the assets, liabilities,
condition (financial or otherwise), results or operations or prospects of the
Company from those reflected on the Quarterly Report, except changes in the
ordinary course of business that have not, individually or in the aggregate, had
a Material Adverse Effect.

                  (h) No Liabilities. Except as set forth in the SEC Filings or
Schedule 2(h), neither the Company nor Newco nor any of their respective
subsidiaries has incurred or suffered any liability or obligation, matured or
unmatured, contingent or otherwise, except in the ordinary course of business
that have not, individually or in the aggregate, had a Material Adverse Effect.

                  (i) Properties and Assets; Etc. (i) The Company does not own
any interest in real property, and (ii) the Company owns or has the right to use
pursuant to license, sub-license, agreement or permission all Intellectual
Property necessary for the operation of its business as presently conducted,
including patents, patent applications, continuations, continuations-in-part,
extensions, trademarks and trademark applications, know-how and other
intellectual property, as reflected in the Financial Statements, subject in each
case, to no Encumbrances required to be disclosed in the Financial Statements
except as set forth therein. Except as set forth on Schedule 2(i), (i) all of
the Company's patents, trademarks, service marks, trade names, and copyrights
which are owned by the Company are owned free and clear of all liens, claims and
encumbrances and are valid and duly issued or existing; none of the Company's
rights in or use of such patents, trademarks, service marks, trade names or
copyrights has been or is currently being threatened to be, challenged; to the
Company's knowledge, without makng any inquiry other than those, if any,
routinely conducted by the Company in the ordinary course of business, no
current or currently planned product based upon the Company's intellectual
property would infringe any patent, trademark, service mark, trade name or
copyright of any other person or entity issued or pending on the Closing Date if
the Company were to distribute, sell or manufacture such products; and the
Company is not aware, after due inquiry, of any actual or threatened claim by
any person or entity alleging any infringement by the Company of a patent,
trademark, service mark, trade name or copyright possessed by such Person; (ii)
all of such patents, trademark registrations, service mark registrations, trade
name registrations and copyrights and copyright registrations, whether foreign
or domestic, have been duly issued and have not been canceled, abandoned, or
otherwise terminated; and (iii) all of the Company's patent applications,
trademark applications, service mark applications, trade name applications and
copyright applications have been duly filed.

                  (ii) Each of the Contracts listed as an exhibit to the
Company's Annual Report is a legal and valid agreement binding upon each of the
parties thereto and is in full force and effect and, to the best knowledge of
the Company, there is no breach or default by any party






                                       6
<PAGE>   7


thereunder. Such Contracts constitute all material agreements, arrangements or
understandings required to be included in such Annual Report under Securities
and Exchange Commission regulations promulgated in connection therewith.

                  (iii) The Company has and maintains adequate and sufficient
insurance, including liability, casualty and products liability insurance,
covering risks associated with its business, properties and assets, including
insurance that is customary for companies similarly situated.

                  (iv) The Company, its business and properties and assets are
in compliance, in all material respects, with all applicable laws and
regulations, including without limitation, those relating to (a) health, safety
and employee relations, (ii) environmental matters, including the discharge of
any hazardous or potentially hazardous materials into the environment, and (iii)
the development, commercialization and sale of pharmaceutical and biotechnology
products, including all applicable regulations of the U.S. Food and Drug
Administration and comparable foreign regulatory authorities.

                  (j) Legal Proceedings, etc. There is no legal, administrative,
arbitration or other action or proceeding or governmental investigation pending
or threatened against the Company, or any director, officer or employee of the
Company, which is required to be described in the Company's SEC Filings and is
not so described. The Company is not in violation of or default under, any
material laws, judgments, injunctions, orders or decrees of any court,
governmental department, commission, agency, instrumentality or arbitrator
applicable to its business.

                  (k) Disclosure. The Company's SEC Filings and the
representations and warranties set forth herein and the Transaction Documents,
when viewed collectively, do not contain any untrue statement of a material fact
or omit to state any material fact necessary to make the statements contained
herein and therein not misleading.

                  (l) Brokers or Finders. Other than as set forth on Schedule
2(l), the Company has not retained any investment banker, broker or finder in
connection with the transactions contemplated by the Transaction Documents; and
the Company agrees to indemnify and hold EIS harmless against any liability,
settlement or expense arising out of, or in connection with, any claim related
thereto.

                  SECTION 3. Representations,Warranties and Covenants of EIS.
EIS hereby represents, warrants and covenants to the Company as follows:

                  (a) Organization. EIS is a corporation duly organized, validly
existing and in good standing under the laws of Bermuda and has all requisite
corporate power and authority to own and lease its properties, to carry on its
business as presently conducted and as proposed to be conducted and to
consummate the transactions contemplated hereby. EIS is qualified and in good
standing to do business in each jurisdiction in which the nature of the business
conducted or the property owned by it requires such qualification, except where
the failure to so qualify would not reasonably be expected to have a material
adverse effect on the business or condition





                                       7
<PAGE>   8


(financial or otherwise) of EIS.

                  (b) Authorization of Agreement. EIS has full legal right,
power and authority to enter into this Agreement and purchase and accept the
Note, and perform its obligations hereunder, which have been duly authorized by
all requisite corporate action. This Agreement and the purchase of the Note are
the valid and binding obligations of EIS, enforceable against them in accordance
with their terms.

                  (c) No Conflicts. The execution, delivery and performance by
EIS of this Agreement, the purchase and acceptance of the Note and compliance
with provisions hereof by EIS, will not (i) violate any provisions of applicable
law, statute, rule or regulation applicable to EIS or any ruling, written,
injunction, order, judgment or decree of any court, arbitration, administrative
agency of other governmental body applicable to EIS of any of its properties or
assets or (ii) conflict with or result in any breach of any of the terms,
conditions or provisions of, or constitute (with notice or lapse of time to
both) a default (or give rise to any right of termination, cancellation or
acceleration) under, or result in the creation of any Encumbrance upon any of
the properties or assets of EIS under the Certificate of Incorporation or
By-laws of EIS or any material contract to which EIS is party, except where such
violation conflict or breach would not, individually or in the aggregate, have a
material adverse effect on EIS.

                  (d) Approvals. No permit, authorization, consents or approval
of or by, or any notification of or filing with, any person or entity
(governmental or otherwise) is required in connection with the execution,
delivery or performance of this Agreement or the Note (including the funding and
acceptance thereof) by EIS.

                  (e) Investment Representations. (i) EIS is sophisticated in
transactions of this type and capable of evaluating the merits and risks of the
transactions described herein and in the other Transaction Documents, and has
the capacity to protect its own interests. EIS has not been formed solely for
the purpose of entering into the transactions described herein and therein and
is acquiring the Securities for investment for its own account, not as a nominee
or agent, and not with the view to, or for sale in connection with, any
distribution of any part thereof; provided, that EIS shall be permitted to
convert or exchange such Securities and/or transfer them as permitted herein and
under applicable law.

                  (ii) Nothing contained in this Section 3(e) shall limit any of
the Company's representations or warranties or limit EIS's recourse in respect
thereof.

                  (iii) Other than as set forth on Schedule 3(e)(iii), EIS has
not retained any investment banker, broker or finder in connection with the
transactions contemplated by the Transaction Documents; and EIS agrees to
indemnify and hold the Company harmless against any liability, settlement or
expense arising out of, or in connection with, any claim related thereto.

              (f) Standstill. EIS shall not, for a period of [****] from the
Closing Date, without

**** REPRESENTS MATERIAL REACTED PURSUANT TO A REQUEST 
FOR CONFIDENTIAL TREATMENT PURSUANT TO RULE 24B-2 UNDER 
THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED.







                                       8
<PAGE>   9


the prior written approval of the Company's board of directors, (i) acquire any
of the Company's Common Stock (or securities exchangeable, convertible or
exercisable therefor) other as contemplated herein, (ii) enter into any merger,
consolidation or similar transaction with the Company, (iii) otherwise attempt
to influence such board of directors or the Company's stockholders to effect a
merger, consolidation, sale or all or substantially all of its assets or
business or (iv) make any public announcement relating to (i), (ii) or (iii)
above; provided, that the foregoing shall not be applicable in the event that
any person or group not affiliated with EIS (as defined in the regulations under
the Securities Exchange Act of 1934) (A) acquires 5% or greater of the Company's
Common Stock (or any such exchangeable, convertible or exercisable securities)
or (B) otherwise attempts to influence the board of directors of Endorex with
respect to a merger, consolidation, asset sale or similar transaction or (C)
indicates publicly its intention to effect any transaction in (A) or (B).

                  SECTION 4. Covenants of the Company. (a) Non-Disclosure. From
and after the date hereof, the Company shall not disclose to any person or
entity (other than its directors, officers and agents who need to know such
information in connection with the transactions described herein and the other
Transaction Documents (each of whom shall be informed of this confidentiality
provision) the content of this Agreement or any of the other Transaction
Documents or the substance of the transactions described herein, without the
prior written consent of EIS, except to the extent required by applicable laws
or administrative or judicial process, pursuant to arrangements with financial,
accounting or legal advisors, or in respect of press releases and periodic
publicly-filed reports prepared in good faith by the Company; provided, that the
Company shall provide EIS with a reasonable opportunity to review and approve
such releases or reports.

                  (b) Board of Directors. For as long as EIS shall own [****] of
the Common Stock, [****], EIS shall be entitled to nominate a director (the "EIS
Director"), and the Company shall use its best efforts to cause the EIS Director
to be elected to the Company's board of directors, including by including the
EIS Director in the management slate of directors at each meeting of
stockholders at which an election of directors occurs.

                  (c) Fully-diluted Stock Ownership. Notwithstanding any other
provision of this Agreement, in the event that EIS shall have determined that at
any time it (together with its Affiliates, if applicable) holds or has the right
to receive Common Stock (or securities or rights, options or warrants
exercisable, exchangeable or convertible for or into Common Stock) representing
in the aggregate in excess of 19.9% of the Company's outstanding Common Stock
(assuming any such exercise, exchange or conversion, but not the exercise,
exchange or conversion of any other similar securities), EIS shall have the
right, in its sole discretion, rather than acquiring such securities from the
Company, to exchange such number of securities as are necessary to bring its
holdings to below 19.9% of the voting securities of the Company, for non-voting,
no liquidation preference equity securities of the Company (which shall be
reasonably satisfactory to the Company and EIS), which equity securities shall
be entitled to all of the other

**** REPRESENTS MATERIAL REACTED PURSUANT TO A REQUEST 
FOR CONFIDENTIAL TREATMENT PURSUANT TO RULE 24B-2 UNDER 
THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED.






                                       9
<PAGE>   10


rights and benefits of the Common Stock. In the event that EIS shall undertake
to exercise such right, EIS shall retain the additional right to exchange such
new class of equity security for Common Stock, in its discretion.

                  (d) Use of Proceeds. The Company shall use the proceeds of the
sale of the Series B Preferred Stock solely for the purpose of meeting its
capitalization and funding requirements to Newco, as described in the Newco
Subscription and Stockholder Agreement dated as of the date hereof.

                  (e) Further Assurances. From and after the date hereof, each
of the parties hereto agrees to do or cause to be done such further acts and
things and deliver or cause to be delivered to each other such additional
assignments, agreements, powers and instruments, as each may reasonably require
or deem advisable to carry into effect the purposes of the Transaction Documents
or to better to assure and confirm unto each other their respective rights,
powers and remedies hereunder and thereunder.

                  SECTION 5. Entire Agreement. This Agreement and the other
Transaction Documents contain the entire understanding of the parties with
respect to the subject matter hereof and supersede all prior agreements and
understandings among the parties with respect thereto; provided, that Section 4
of the letter agreement dated December 31, 1997 (the "Letter Agreement") between
Elan Corporation, plc, an Irish limited company and EIS, on the one hand, and
the Company, on the other hand, shall survive the execution and delivery hereof
and be subject to the provisions of Section 6 hereof..

                  SECTION 6. Survival and Indemnification. (a) Survival Period.
The representations and warranties of the Company contained herein shall survive
for a period of three years after the date hereof.

                  (b) Indemnification. In addition to all rights and remedies
available to the parties hereunder at law or in equity, the Company and Newco
(each in such capacity, an "Indemnifying Party") shall indemnify EIS, and its
respective affiliates, and EIS' and its respective affiliates' stockholders,
officers, directors, employees, agents, representatives, successors and assigns
(collectively, the "Indemnified Person"), and save and hold EIS harmless from
and against and pay on behalf of or reimburse each such Indemnified Person, as
and when incurred, for any and all loss, liability, demand, claim, action, cause
of action, cost, damage, deficiency, tax, penalty, fine or expense, whether or
not arising out of any claims by or on behalf of such Indemnified Person or any
third party, including interest, penalties, reasonable attorneys' fees and
expenses and all amounts paid in investigation, defense or settlement of any of
the foregoing (collectively, "Losses"), that any such Indemnified Person may
suffer, sustain incur or become subject to, as a result of, in connection with,
relating or incidental to or by virtue of:

                           (i) any misrepresentation or breach of warranty on
         the part of the Indemnifying Party under Section 2 of this Agreement or
         Section 4 of the Letter Agreement; or





                                       10
<PAGE>   11



                           (ii) any nonfulfillment, default or breach of any
         covenant or agreement on the part of the Indemnifying Party under
         Section 4 of this Agreement.

                  (c) Maximum Recovery. The maximum recovery of EIS under this
Section 6 shall not exceed [****]. No Indemnified Party shall assert any such
claim unless Losses in respect thereof incurred by any Indemnified Party, when
aggregated with all previous Losses hereunder, equal or exceed [****], and the
obligation of the Indemnifying Party to indemnify shall not apply to the first
[****] of losses to the Indemnified Person.

                  (d) Exception. Notwithstanding the foregoing, and subject to
the following sentence, upon judicial determination that is final and no longer
appealable, that the act or omission giving rise to the indemnification set
forth above resulted primarily out of or was based primarily upon the
Indemnified Person's negligence (unless such Indemnified Person's negligence was
based upon the Indemnified Person's reliance in good faith upon any of the
representations, warranties, covenants or promises made by the Indemnifying
Party herein), the Indemnifying Party shall not be responsible for any Losses
sought to be indemnified in connection therewith, and the Indemnifying Party
shall be entitled to recover from the Indemnified Person all amounts previously
paid in full or partial satisfaction of such indemnity, together with all costs
and expenses (including reasonable attorneys fees) of the Indemnifying Party
reasonably incurred in connection with the Indemnified Party's claim for
indemnity, together with interest at the rate per annum publicly announced by
Morgan Guaranty Trust Company as its prime rate from the time of payment of such
amounts to the Indemnified Person until repayment to the Indemnifying Party.

                  (e) Investigation. All indemnification rights hereunder shall
survive the execution and delivery of this Agreement and the consummation of the
transactions contemplated hereby to the extent provided in Section 6(b) above,
irrespective of any investigation, inquiry or examination made for or on behalf
of, or any knowledge of the Indemnified Person or the acceptance of any
certificate or opinion.

                  (f) Contribution. If the indemnity provided for the this
Section 6 shall be, in whole or in part, unavailable to any Indemnified Person,
due to Section 6(b) being declared unenforceable by a court of competent
jurisdiction based upon reasons of public policy, so that Section 6(b) shall be
insufficient to hold each such Indemnified Person harmless from Losses which
would otherwise be indemnified hereunder, then the Indemnifying Party and the
Indemnified Person shall each contribute to the amount paid or payable for such
Loss in such proportion as is appropriate to reflect not only the relative
benefits received by the Indemnifying Party on the one hand and the Indemnified
Person on the other, but also the relative fault of the Indemnifying Party and
be in addition to any liability that the Indemnifying Party may otherwise have.
Subject to Section 6(h) hereunder, the indemnity, contribution and expense
reimbursement obligations that the Indemnifying Party has under this Section 6
shall survive the expiration of the Transaction Documents. The parties hereto
further agree that the indemnification and reimbursement commitments set forth
in this Agreement shall apply whether or not the

**** REPRESENTS MATERIAL REACTED PURSUANT TO A REQUEST 
FOR CONFIDENTIAL TREATMENT PURSUANT TO RULE 24B-2 UNDER 
THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED.








                                       11
<PAGE>   12


Indemnified Person is a formal part to any such lawsuit, claims or other
proceedings.

                  (g) Limitation. No claim shall be brought by an Indemnified
Person in respect of any misrepresentation or breach of warranty under this
Agreement after three years from and after the date hereof unless written notice
thereof shall have been provided prior to such three-year period, in which case
such surviving claims shall be limited to those in such notice; and any claim
for nonfulfillment, default or breach of any covenant shall be brought within
one year of the date of that such Indemnified Person became aware or should have
become aware of the nonfulfillment, default or breach, unless written notice
thereof shall have been provided prior to such one-year period, in which case
such surviving claims shall be limited to those in such notice. Except as set
forth in the previous sentence and in Section 6(c) above, this Section 6 is not
intended to limit the rights or remedies otherwise available to any party hereto
with respect to this Agreement or the Transaction Documents.

                  SECTION 7. Notices. All notices, demands and requests of any
kind to be delivered to any party in connection with this Agreement shall be in
writing and shall be deemed to have been duly given if personally delivered or
if sent by nationally-recognized overnight courier or by registered or certified
airmail, return receipt requested and postage prepaid, or by facsimile
transmission, addressed as follows:

                           (i) if to the Company, to:

                           Endorex Corp.
                           900 North Shore Drive
                           Lake Bluff, Illinois  60044
                           Facsimile: 847-604-8570
                           Attention: Michael S. Rosen

                           with a copy to:

                           Brobeck, Phleger & Harrison LLP
                           1633 Broadway, 47th Floor
                           New York, New York  10019
                           Facsimile: (212) 586-7878
                           Attn: Richard R. Plumridge, Esq.

                           (ii) if to EIS, to:

                           Elan International Services, Ltd.
                           102 St. James Court
                           Flatts Smiths SL04
                           Bermuda
                           Facsimile: (441) 292-2224
                           Attention: President




                                       12
<PAGE>   13



                           with a copy to:

                           Brock Fensterstock Silverstein & McAuliffe LLC
                           Citicorp Center
                           153 East 53rd Street
                           New York, New York 10022
                           Facsimile: (212) 371-5500
                           Attention: David Robbins

or to such other address as the party to whom notice is to be given may have
furnished to the other party hereto in writing in accordance with provisions of
this Section 7. Any such notice or communication shall be deemed to have been
received (i) in the case of personal delivery or facsimile transmission, on the
date of such delivery, (ii) in the case of nationally-recognized overnight
courier, on the second business day after the date when sent and (iii) in the
case of mailing, on the fifth business day following that day on which the piece
of mail containing such communication is posted. Notice hereunder may be given
on behalf of the parties by their respective attorneys.

                  SECTION 8. Amendments. This Agreement may not be modified or
amended, or any of the provisions hereof waived, except by written agreement of
the Company and EIS.

                  SECTION 9. Counterparts and Facsimile. The Transaction
Documents may be executed in any number of counterparts, and each such
counterpart hereof shall be deemed to be an original instrument, but all such
counterparts together shall constitute one agreement. Each of the Transaction
Documents may be signed and delivered to the other party by facsimile
transmission; such transmission shall be deemed a valid signature.

                  SECTION 10. Headings. The section and paragraph headings
contained in this Agreement are for reference purposes only and shall not affect
in any way the meaning or interpretation of the Agreement.

                  SECTION 11. Governing Law. This Agreement shall be governed by
and construed in accordance with the internal laws of the State of New York,
without giving effect to principles of conflicts of laws.

                  SECTION 12. Expenses. Each of the parties shall be responsible
for its own costs and expenses incurred in connection with the transactions
contemplated hereby and by the other Transaction Documents.

                  SECTION 13. Public Releases; Etc. The parties shall reasonably
agree in writing upon the contents of any press release or releases and other
public disclosure in respect of the transactions contemplated hereby, and no
such press release or disclosure shall be made except as so agreed, except as
may otherwise be required by applicable law or judicial or administrative






                                       13
<PAGE>   14


process or pursuant to arrangements with financial, accounting or legal avisors.

                  SECTION 14. Schedules, etc. All statements contained in any
exhibit or schedule delivered by or on behalf of the parties hereto, or in
connection with the transactions contemplated hereby, are an integral part of
this Agreement and shall be deemed representations and warranties hereunder.

                  SECTION 15. Assignments. This Agreement and all of the
provisions hereof shall be binding upon and inure to the benefit of the parties
hereto and their respective successors and permitted assigns. This Agreement,
the other Transaction Documents, and the Securities may be transferred by EIS to
affiliates and subsidiaries without restriction; provided, however, that EIS
shall remain liable for its obligations hereunder after any such assignment.




                  IN WITNESS WHEREOF, each of the undersigned has duly executed
this Securities Purchase Agreement as of the date first written above.


                                  ENDOREX CORP.




                                  By:/s/ Michael S. Rosen
                                     -------------------------------------
                                     Michael S. Rosen
                                     President and Chief Executive Officer

                                  ELAN INTERNATIONAL SERVICES, LTD.



                                  By:/s/ Kevin Insley
                                     -------------------------------------
                                     Name: Kevin Insley
                                     Title: President & CEO









                                       14

<PAGE>   1
                                                                   EXHIBIT 10.18

                                ENDOREX CORP.
                        REGISTRATION RIGHTS AGREEMENT

              THIS REGISTRATION RIGHTS AGREEMENT is made as of January 21, 1998,
by and among ENDOREX CORP., a Delaware corporation (the "Company"), and ELAN
INTERNATIONAL SERVICES, LTD., a Bermuda corporation ("EIS").


                                R E C I T A L S:

              A. Pursuant to a Securities Purchase Agreement dated as of the
date hereof by and between Endorex and EIS (the "Purchase Agreement"), EIS has
acquired (x) certain shares of common stock, par value $.001 per share (the
"Common Stock") of the Company, (y) a warrant to purchase shares of Common Stock
(the "Warrant"), and (z) certain shares of Series A preferred stock (the
"Preferred Stock"), which Preferred Stock may be convertible into shares of
Common Stock.

              B. The execution of the Purchase Agreement has occurred on the
date hereof; it being a condition to the closing of the transactions
contemplated thereby that the parties execute and deliver this Agreement.

              C. The parties desire to set forth herein their agreement related
to the granting of certain registration rights to the Holders (as defined below)
of any Common Stock or securities convertible into Common Stock.


                               A G R E E M E N T:

              The parties hereto agree as follows:

                 1. Certain Definitions. As used in this Agreement, the
following terms shall have the following respective meanings:

                 "Affiliate" of any Person shall mean any other Person
controlling, controlled by or under common control with such particular Person.
In the case of a natural Person, his Affiliates include members of such Person's
immediate family, natural lineal descendants of such Person or a trust for the
exclusive benefit of such Person and his immediate family and natural lineal
descendants.

                 "Commission" shall mean the Securities and Exchange Commission
or any other federal agency at the time administering the Securities Act.


<PAGE>   2



                 "Exchange Act" shall mean the Securities Exchange Act of 1934,
as amended, or any similar federal statute and the rules and regulations of the
Commission thereunder, all as the same shall be in effect at the time.

                 "Holders", "holders" or "Holders of Registerable Securities"
shall mean EIS and any Person who shall have acquired Registrable Securities
from EIS as permitted herein, either individually or jointly as the case may be.

                 "Person" shall mean an individual, a partnership, a company, an
association, a joint stock company, a trust, a joint venture, an unincorporated
organization and a governmental quasi-governmental entity or any department,
agency or political subdivision thereof.

                 "Registrable Securities" means (i) any Common Stock issued or
issuable under the Purchase Agreement, (ii) any Common Stock issued or issuable
upon conversion of or in connection with the holding of the Preferred Stock,
(iii) any Common Stock issued or issuable in connection with the exercise of the
Warrant, and (iv) any Common Stock issued or issuable in respect of the
securities referred to in clause (ii) above upon any stock split, stock
dividend, recapitalization or similar event; excluding in all cases, however,
any Registrable Securities sold by a Person in a transaction (including a
transaction pursuant to a registration statement under this Agreement and
transaction pursuant to Rule 144 promulgated under the Securities Act) in which
registration rights are not transferred pursuant to Section 9 hereof.

                 The terms "register," "registered" and "registration" refer to
a registration effected by preparing and filing a registration statement in
compliance with the Securities Act, and the declaration or ordering of the
effectiveness of such registration statement.

                 "Registration Expenses" shall mean all expenses, other than
Selling Expenses, incurred by the Company in complying with Sections 2 or 3
hereof, including without limitation, all registration, qualification and filing
fees, exchange listing fees, printing expenses, escrow fees, fees and
disbursements of counsel for the Company, blue sky fees and expenses, the
expense of any special audits incident to or required by any such registration
and the reasonable fees and disbursements, not to exceed $10,000 in the
aggregate, of one counsel for the Holders, such counsel to be selected by
Holders holding a majority of the Registrable Securities held by the Holders and
included in such registration.

                 "Securities Act" shall mean the Securities Act of 1933, as
amended, or any similar federal statute and the rules and regulations of the
Commission thereunder, all as the same shall be in effect at the time.

                 "Selling Expenses" shall mean all underwriting discounts,
selling commissions and stock transfer taxes applicable to the securities
registered by the Holders and the costs of any accountants, counsel or other
experts retained by the Holders.

                            2. Demand Registrations. (a) Requests for
Registration. (i) Any Holder or Holders who collectively hold Registrable
Securities representing at least 25% of the










<PAGE>   3


Registered Securities then outstanding shall have the right at any time from
time to time, to request registration under the Securities Act of all or part of
their Registrable Securities on Form S-1, S-2 or S-3 (if available) or any
similar registration (each, a "Demand Registration"), such form to be selected
by the Company. Each written request for a Demand Registration shall specify the
approximate number of Registrable Securities requested to be registered. Within
10 days after receipt of any such request, the Company will give written notice
of such requested registration to all other Holders of Registrable Securities
and, if they request to be included in such registration, the Company shall
include such Holders' Registrable Securities in such offering if they have
responded affirmatively within 10 days after the receipt of the Company's
notice. The Holders in aggregate will be entitled to request two Demand
Registrations. A registration will not count as one of the permitted Demand
Registrations until it has become effective (unless such Demand Registration has
not become effective due solely to the fault of the Holders requesting such
registration, including a request by such Holders that such registration be
withdrawn). The Company will pay all Registration Expenses in connection with
any Demand Registration whether or not such Demand Registration has become
effective; provided, that the Company shall not be obligated to pay such
Registration Expenses if the Demand Registration has not become effective due to
the fault of the Holders requesting such registration.

                  (ii) The Company shall use its best efforts to file as soon as
reasonably practicable after such demand a Demand Registration, and shall use
its best efforts to have such Demand Registration declared effective as soon as
reasonably practicable after such filing.

                  (b) Priority on Demand Registrations. If a Demand Registration
is an underwritten offering and the managing underwriters advise the Company in
writing that in their opinion the number of Registrable Securities and, if
permitted hereunder, other securities requested to be included in such offering,
exceeds the number of Registrable Securities and other securities, if any, which
can be sold in such offering without adversely affecting the marketability of
the offering, the Company will include in such registration:

                  (i) first, the Registrable Securities requested to be included
in such registration by the Holders (or, if necessary, such Registrable
Securities pro rata among the Holders thereof based upon the number of
Registrable Securities owned by each such Holder) together with any securities
held by third parties holding a similar, previously granted right to be included
in such registration; and

                  (ii) thereafter, other securities requested to be included in
such registration.

                  (c) Restrictions on Demand Registrations. The Company may
postpone for up to six months in any 12 month period, the filing or the
effectiveness of a registration statement for a Demand Registration if the
Company determines in good faith that such Demand Registration would reasonably
be expected to have a material adverse effect on any proposal or plan by the
Company to engage in any financing, acquisition or disposition of assets (other
than in the ordinary course of business) or any merger, consolidation, tender
offer or similar transaction or would require disclosure of any information that
the board of directors of the Company



<PAGE>   4


determines in good faith the disclosure of which would be detrimental to the
Company; provided, that in such event, the Holders initially requesting such
Demand Registration will be entitled to withdraw such request and, if such
request is withdrawn, such Demand Registration will not count as one of the
permitted Demand Registrations hereunder and the Company will pay any
Registration Expenses in connection with such withdrawn registration.

                  (d) Selection of Underwriters. The Holders will have the right
to select the investment banker(s) and manager(s) to administer an offering
pursuant to a Demand Registration, subject to the Company's approval, which will
not be unreasonably withheld.

                  (e) Other Registration Rights. Except as provided in this
Agreement, so long as any Holder owns any Registrable Securities, the Company
will not grant to any Persons the right to request the Company to register any
equity securities of the Company, or any securities convertible or exchangeable
into or exercisable for such securities, which is in conflict with the rights
granted to the Holders hereunder, without the prior written consent of the
Holders of at least 50% of the Registrable Securities held by the Holders; it
being understood that the Company may grant rights to other Persons to (i)
participate in Piggyback Registrations so long as such rights are subordinate or
pari passu to the rights of the holders of Registrable Securities with respect
to such Piggyback Registrations and (ii) demand registrations so long as the
Holders of Registrable Securities are entitled to participate in any such
registrations with such Persons pro rata on the basis of the number of shares
owned by each such Holder.

                  3. Piggyback Registrations. (a) Right to Piggyback. At any
time the Company shall propose to register Common Stock under the Securities Act
(other than in a registration on Form S-3 relating to sales of securities to
participants in a Company dividend reinvestment plan, S-4 or S-8 or any
successor form or in connection with an acquisition or exchange offer or an
offering of securities solely to the existing stockholders or employees of the
Company) (each, a "Piggyback Registration"), the Company will give prompt
written notice to all Holders of Registrable Securities of its intention to
effect such a registration and, subject to Section 3(b) and the other terms of
this Agreement, will include in such registration all Registrable Securities
which are permitted under applicable securities laws to be included in the form
of registration statement selected by the Company and with respect to which the
Company has received written requests for inclusion therein within 15 days after
the receipt of the Company's notice.

                  (b) Priority on Piggyback Registrations. If a Piggyback
Registration is an underwritten registration on behalf of the Company, and the
managing underwriters advise the Company in writing that in their opinion the
number of securities requested to be included in such registration exceeds the
number which can be sold in such offering without adversely affecting the
marketability of the offering, the Company will include in such registration:

                             (i)  the securities the Company proposes to sell;

                             (ii) any securities having the right to
           be included in such registration prior to the securities of the 
           Holders;


<PAGE>   5



                             (iii) the Registrable Securities requested to be
           included in such registration by the Holders and any securities
           requested to be included in such registration by any other Person,
           pro rata among the Holders of such Registrable Securities and such
           other Persons, on the basis of the number of shares owned by each of
           such Holders; and

                             (iv) thereafter, other securities requested to be
           included in such registration.

                       The Holders of any Registrable Securities included in
such a registration must execute an underwriting agreement in form and substance
satisfactory to the managing underwriters.

                  (c) Right to Terminate Registration. If, at any time after
giving written notice of its intention to register any of its securities as set
forth in Section 3(a) and prior to the effective date of the registration
statement filed in connection with such registration, the Company shall
determine for any reason not to register such securities, the Company may, at
its election, give written notice of such determination to each Holder of
Registrable Securities and thereupon be relieved of its obligation to register
any Registrable Securities in connection with such registration (but not from
its obligation to pay the Registration Expenses in connection therewith as
provided herein).

                  (d) Selection of Underwriters. The Company will have the right
to select the investment banker(s) and manager(s) to administer an offering
pursuant to a Piggyback Registration.

                  4. Expenses of Registration. Except as otherwise provided
herein, all Registration Expenses incurred in connection with all registrations
pursuant to Section 2 and 3 shall be borne by the Company. All Selling Expenses
relating to securities registered on behalf of the Holders of Registrable
Securities shall be borne by such holders.

                  5. Holdback Agreements. (a) The Company agrees (i) not to
effect any public sale or distribution of its equity securities, or any
securities convertible into or exchangeable or exercisable for such securities,
during the seven days prior to and during the 90-day period beginning on the
effective date of any underwritten Demand Registration or any underwritten
Piggyback Registration (except as part of such underwritten registration or
pursuant to registrations on Form S-8 or any successor form), unless the
underwriters managing the registered public offering otherwise agree, and (ii)
to use reasonable efforts to cause each holder of at least 5% (on a
fully-diluted basis) of its Common Stock, or any securities convertible into or
exchangeable or exercisable for Common Stock, purchased from the Company at any
time after the date of this Agreement (other than in a registered public
offering) to agree not to effect any public sale or distribution (including
sales pursuant to Rule 144) of any such securities during such periods (except
as part of such underwritten registration, if otherwise permitted), unless the
underwriters managing the registered public offering otherwise agree.


<PAGE>   6



                   (b) Each Holder of Registrable Securities agrees, if
requested by the managing underwriter or underwriters in an underwritten
offering of securities of the Company, not to effect any offer, sale,
distribution or transfer (or offer or agree to do so) of Registrable Securities,
including a sale pursuant to Rule 144 (or any similar provision then effect)
under the Securities Act (except as part of such underwritten registration),
during the seven-day period prior to, and during the 90-day period or such
shorter period as may be agreed to by the parties hereto) following the
effective date of such Registration Statement to the extent timely notified in
writing by the Company or the managing underwriter or underwriters.

                  6. Registration Procedures. Whenever the Holders of
Registrable Securities have requested that any Registrable Securities be
registered pursuant to this Agreement, the Company will use its best efforts to
effect the registration and the sale of such Registrable Securities in
accordance with the intended method of distribution thereof, and pursuant
thereto the Company will as expeditiously as possible:

                  (a) subject to Section 2(c) hereof, prepare and file with the
Commission a registration statement on any form for which the Company qualifies
with respect to such Registrable Securities and use its best efforts to cause
such registration statement to become effective (provided that before filing a
registration statement or prospectus or any amendments or supplements thereto,
the Company will (i) furnish to the counsel selected by the Holders copies of
all such documents proposed to be filed, which documents will be subject to the
review of such counsel, and (ii) notify each holder of Registrable Securities
covered by such registration of any stop order issued or threatened by the
Commission);

                  (b) subject to Section 2(c) hereof, prepare and file with the
Commission such amendments and supplements to such registration statement and
the prospectus used in connection therewith as may be necessary to keep such
registration statement effective for a period equal to the shorter of (i) six
months and (ii) the time by which all securities covered by such registration
statement have been sold, and comply with the provisions of the Securities Act
with respect to the disposition of all securities covered by such registration
statement during such period in accordance with the intended methods of
disposition by the sellers thereof set forth in such registration statement;

                  (c) furnish to each seller of Registrable Securities such
number of copies of such registration statement, each amendment and supplement
thereto, the prospectus included in such registration statement (including each
preliminary prospectus) and such other documents as such seller may reasonably
request in order to facilitate the disposition of the Registrable Securities
owned by such seller;

                  (d) use its best efforts to register or qualify such
Registrable Securities under such other securities or blue sky laws of such
jurisdiction as any seller reasonably requests and do any and all other acts and
things which may be reasonably necessary or advisable to enable such seller to
consummate the disposition in such jurisdictions of the Registrable Securities
owned by such seller (provided that the Company will not be required to (i)
qualify generally to do business in any jurisdiction where it would not
otherwise be required to qualify but for this



<PAGE>   7


Section 6(d), (ii) subject itself to taxation in any jurisdiction or (iii)
consent to general service of process in any such jurisdiction);

                  (e) notify each seller of such Registrable Securities, at any
time when a prospectus relating thereto is required to be delivered under the
Securities Act, of the happening of any event as a result of which the
prospectus included in such registration statement contains an untrue statement
of a material fact or omits any fact necessary to make the statements therein
not misleading, and, at the request of any such seller, the Company will prepare
a supplement of amendment to such prospectus so that, as thereafter delivered to
the purchasers of such Registrable Securities, such prospectus will not contain
an untrue statement of a material fact or omit to state any fact necessary to
make the statements therein not misleading; provided that the Company shall not
be required to amend the registration statement or supplement the Prospectus for
a period of up to six months if the board of directors determines in good faith
that to do so would reasonably be expected to have a material adverse effect on
any proposal or plan by the Company to engage in any financing, acquisition or
disposition of assets (other than in the ordinary course of business) or any
merger, consolidation, tender offer or similar transaction or would require the
disclosure of any information that the board of directors determines in good
faith the disclosure of which would be detrimental to the Company, it being
understood that the period for which the Company is obligated to keep the
Registration Statement effective shall be extended for a number of days equal to
the number of days the Company delays amendments or supplements pursuant to this
provision. Upon receipt of any notice pursuant to this section 6(e) Holders
shall suspend all offers and sales of securities of the Company and all use of
any prospectus until advised by the Company that offers and sales may resume,
and shall keep confidential the fact and content of any notice given by the
Company pursuant to this section 6(e)

                  (f) cause all such Registrable Securities to be listed on each
securities exchange on which similar securities issued by the Company are then
listed and, if not so listed, to be listed on the NASD automated quotation
system and, if listed on the NASD automated quotation system, use its best
efforts to secure designation of all such Registrable Securities covered by such
registration statement as a Nasdaq National Market System security within the
meaning of Rule 11Aa2-1 of the Commission or, failing that, to secure Nasdaq
authorization for such Registrable Securities and, without limiting the
generality of the foregoing, to arrange for at least two market makers to
register as such with respect to such Registrable Securities with the NASD;

                  (g) provide a transfer agent and registrar for all such
Registrable Securities not later than the effective date of such registration
statement;

                  (h) enter into such customary agreements (including
underwriting agreements in customary form) and take all such other actions as
the holders of a majority of the Registrable Securities being sold or the
underwriters, if any, reasonably request in order to expedite or facilitate the
disposition of such Registrable Securities (including without limitation,
effecting a stock split or a combination of shares);


<PAGE>   8



                  (i) make available for inspection by a representative of the
Holders of Registrable Securities included in the registration statement, any
underwriter participating in any disposition pursuant to such registration
statement and any attorney, accountant or other agent retained by any such
seller or underwriter all pertinent financial and other records, pertinent
corporate documents and properties of the Company, and cause the Company's
officers, directors, employees and independent accountants to supply all
information reasonable requested by any such seller, underwriter, attorney,
accountant or agent in connection with such registration statement;

                  (j) otherwise use its reasonable efforts to comply with all
applicable rules and regulations of the Commission, and make available to its
security holders, as soon as reasonably practicable, an earnings statement
covering the period of at least 12 months beginning with the first day of the
Company's first full calendar quarter after the effective date of the
registration statement, which earnings statement shall satisfy the provisions of
Section 11(a) of the Securities Act and Rule 158 thereunder;

                  (k) in the event of the issuance of any stop order suspending
the effectiveness of a registration statement, or of any order suspending or
preventing the use of any related prospectus or suspending the qualification of
any common stock included in such registration statement for sale in any
jurisdiction, the Company will use its reasonable best efforts promptly to
obtain the withdrawal of such order; and

                  (l) obtain a so-called "cold comfort" letter from the
Company's independent public accountants in customary form and covering such
matters of the type customarily covered by cold comfort letters.

                  7. Indemnification. (a) The Company agrees to indemnify, to
the fullest extent permitted by applicable law, each Holder of Registrable
Securities, its officers and directors and each Person who controls such Holder
(within the meaning of the Securities Act) against all losses, claims, damages,
liabilities, expenses or any amounts paid in settlement of any litigation,
investigation or proceeding commenced or threatened (collectively, "Claims") to
which each such indemnified party may become subject under the Securities Act
insofar as such Claim arose out of (i) any untrue or alleged untrue statement of
material fact contained, on the effective date thereof, in any registration
statement, prospectus or preliminary prospectus or any amendment thereof or
supplement thereto or (ii) any omission or alleged omission to state therein a
material fact required to be stated therein or necessary to make the statements
therein not misleading, except insofar as the same are caused by or contained in
any information furnished in writing to the Company by such holder expressly for
use therein or by such holder's failure to deliver a copy of the registration
statement or prospectus or any amendments or supplements thereto after the
Company has furnished such holder with a sufficient number of copies of the
same. In connection with an underwritten offering, the Company will indemnify
such underwriters, their officers and directors and each Person who controls
such underwriters (within the meaning of the Securities Act) to the same extent
as provided above with respect to the indemnification of the holders of
Registrable Securities.


<PAGE>   9



                  (b) In connection with any registration statements in which a
holder of Registrable Securities is participating, each such Holder will furnish
to the Company in writing such customary information and affidavits as the
Company reasonably requests for use in connection with any such registration
statement or prospectus (the "Seller's Information") and, to the fullest extent
permitted by applicable law will indemnify the Company, its directors and
officers and each Person who controls the Company (within the meaning of the
Securities Act) against any and all Claims to which each such indemnified party
may become subject under the Securities Act insofar as such Claim arose out of
(i) any untrue or alleged untrue statement of material fact contained, on the
effective date thereof, in any registration statement, prospectus or preliminary
prospectus or any amendment thereof or supplement thereto, (ii) any omission or
alleged omission to state therein a material fact required to be stated therein
or necessary to make the statements therein not misleading or (iii) any
violations by such Person of any federal, state or common law rule or regulation
applicable to such Person and relating to action required of or inaction by such
Person in connection with any such registration; provided that with respect to a
Claim arising pursuant to clause (i) or (ii) above, the material misstatement or
omission is contained in such Seller's Information; provided, further, that the
obligation to indemnify will be individual to each Holder and will be limited to
the net amount of proceeds received by such Holder from the sale of Registrable
Securities pursuant to such registration statement.

                  (c) Any Person entitled to indemnification hereunder will (i)
give prompt written notice to the indemnifying party of any claim with respect
to which it seeks indemnification (but the failure to provide such notice shall
not release the indemnifying party of its obligation under paragraphs (a) and
(b), unless and then only to the extent that, the indemnifying party has been
prejudiced by such failure to provide such notice) and (ii) unless in such
indemnified party's reasonable judgment a conflict of interest between such
indemnified and indemnifying parties may exist with respect to such claim,
permit such indemnifying party to assume the defense of such claim with counsel
reasonably satisfactory to the indemnified party. An indemnifying party who is
not entitled to, or elects not to, assume the defense of a claim will not be
obligated to pay the fees and expenses of more than one counsel for all parties
indemnified by such indemnifying party with respect to such claim, unless in the
reasonable judgment of any indemnified party a conflict of interest may exist
between such indemnified party and any other of such indemnified parties with
respect to such claim.

                  (d) The indemnifying party shall not be liable to indemnify an
indemnified party for any settlement, or consent to judgment of any such action
effected without the indemnifying party's consent (but such consent will not be
unreasonably withheld). Furthermore, the indemnifying party shall not, except
with the approval of each indemnified party, consent to entry of any judgment or
enter into any settlement which does not include as an unconditional term
thereof the giving by the claimant or plaintiff to each indemnified party of a
release from all liability in respect to such claim or litigation without any
payment or consideration provided by each such indemnified party.

                  (e) If the indemnification provided for in this Section 7 is
unavailable to an indemnified party under clauses (a) and (b) above in respect
of any losses, claims, damages or liabilities referred to therein, then each
indemnifying party, in lieu of indemnifying such







<PAGE>   10


indemnified party, shall contribute to the amount paid or payable by such
indemnified party as a result of such losses, claims, damages or liabilities in
such proportion as is appropriate to reflect not only the relative benefits
received by the Company, the underwriters, the sellers of Registrable Securities
and any other sellers participating in the registration statement from the sale
of shares pursuant to the registered offering of securities to which indemnity
is sought but also the relative fault of the Company, the underwriters the
sellers of Registrable Securities and any other sellers participating in the
registration statement in connection with the statement or omissions which
resulted in such losses, claims, damages or liabilities, as well as any other
relevant equitable considerations. The relative benefits received by the
Company, the underwriters, the sellers of Registrable Securities and any other
sellers participating in the registration statement shall be deemed to be based
on the relative relationship of the total net proceeds from the offering (before
deducting expenses) to the Company, the total underwriting commissions and fees
from the offering (before deducting expenses) to the underwriters and the total
net proceeds from the offering (before deducting expenses) to the sellers of
Registrable Securities and any other sellers participating in the registration
statement. The relative fault of the Company, the underwriters, the sellers of
Registrable Securities and any other sellers participating in the registration
statement shall be determined by reference to, among other things, whether the
untrue or alleged untrue statement of a material fact or the omission or alleged
omission to state a material fact relates to information supplied by the Company
or by registration statement and the parties' relative intent, knowledge, access
to information and opportunity to correct or prevent such statement or omission.

                  (f) The indemnification provided for under this Agreement will
remain in full force and effect regardless of any investigation made by or on
behalf of the indemnified party or any officer, director or controlling person
of such indemnified party and will survive the transfer of securities.

                  8. Participation in Underwritten Registrations. No Person may
participate in any registration hereunder which is underwritten unless such
Person (a) agrees to sell such Person's securities on the basis provided in any
underwriting arrangements approved by the Person or Persons entitled hereunder
to approve such arrangements, (b) as expeditiously as possible notifies the
Company of the occurrence of any event as a result of which such prospectus
contains an untrue statement of material fact or omits to state a material fact
required to be stated therein or necessary to make the statements therein not
misleading and (c) completes and executes all questionnaires, powers of
attorney, indemnities, underwriting agreements and other documents reasonably
required under the terms of such underwriting arrangements.

                  9. Transfer of Registration Rights. The rights granted to any
Person under this Agreement may be assigned only to a transferee or assignee who
is an Affiliate of such Person in connection with any transfer or assignment of
Registrable Securities by a Holder; provided, that: (a) such transfer may
otherwise be effected in accordance with applicable securities laws, (b) if not
already a party hereto, the assignee or transferee agrees in writing prior to
such transfer to be bound by the provisions of this Agreement applicable to the
transferor, (c) such transferee shall own Registrable Securities representing at
least 1,000,000 shares of Common Stock, subject to






<PAGE>   11


the Anti-dilution Adjustments, and (d) EIS shall act as agent and representative
for such Holder for the giving and receiving of notices hereunder.


                  10. Information by Holder. Each Holder shall furnish the
Company such written information regarding such Holder and any distribution
proposed by such Holder as the Company may reasonably request in writing and as
shall be reasonably required in connection with any registration qualification
or compliance referred to in this Agreement.

                  11. Exchange Act Compliance. The Company shall comply with all
of the reporting requirements of the Exchange Act applicable to it and shall
comply with all other public information reporting requirements of the
Commission which are conditions to the availability of Rule 144 for the sale of
the Registrable Securities. The Company shall cooperate with each Purchaser in
supplying such information as may be necessary for such Purchaser to complete
and file any information reporting forms presently or hereafter required by the
Commission as a condition to the availability of Rule 144.

                  12. Limitation on Registration. The Company shall not be
obligated to effect a registration of any Holder's Registrable Securities
pursuant to Sections 2 or 3 hereof if all of the Registrable Securities have
been sold under Rule 144, Regulation S or similar provision under the Securities
Act so that there is no further restriction on the transfer by the transferee.
The Company shall not be required to include any Registrable Securities of a
Holder in a registration if all of such Holder's Registrable Securities could be
sold within a three month period pursuant to Rule 144 or other similar rule or
regulation.

                  13. Miscellaneous. (a) No Inconsistent Agreements. The Company
will not hereafter enter into any agreement with respect to its securities which
is inconsistent with or violates the rights granted to the Holders of
Registrable Securities in this Agreement without the prior written consent of
the Holders of a majority in interest of such Registrable Securities.

                  (b) Remedies. Any Person having rights under any provision of
this Agreement will be entitled to enforce such rights specifically to recover
damages caused by reason of any breach of any provision of this Agreement and to
exercise all other rights granted by law. The parties hereto agree and
acknowledge that money damages may not be an adequate remedy for any breach of
the provisions of this Agreement and that any party may in its sole discretion
apply to any court of law or equity of competent jurisdiction (without posting
any bond or other security) for specific performance and for other injunctive
relief in order to enforce or prevent violation of the provisions of this
Agreement; provided that in no event shall any Holder have the right to enjoin
or interfere with any offering of securities by the Company.

                  (c) Amendments and Waivers. Except as otherwise provided
herein, the provisions of this Agreement may be amended or waived only upon the
prior written consent of the Company and Holders of at least 50% of the
Registrable Securities; provided, that without the prior written consent of all
the Holders, no such amendment or waiver shall reduce the foregoing percentage.







<PAGE>   12



                  (d) Successors and Assigns. All covenants and agreements in
this Agreement by or on behalf of any of the parties hereto will bind and inure
to the benefit of the respective successors and assigns of the parties hereto
whether so expressed or not. In addition, whether or not any express assignment
has been made, the provisions of this Agreement which are for the benefit of
Holders of Registrable Securities are also for the benefit of, and enforceable
by, any permitted transferee of Registrable Securities.

                  (e) Severability. Whenever possible, each provision of this
Agreement will be interpreted in such manner as to be effective and valid under
applicable law, but if any provision of this Agreement is held to be prohibited
by or invalid under applicable law, such provision will be ineffective only to
the extent of such prohibition or invalidity, without invalidating the remainder
of this Agreement.

                  (f) Counterparts. This Agreement may be executed
simultaneously in two or more counterparts, any one of which need not contain
the signatures of more than one party, but all such counterparts taken together
will constitute one and the same Agreement.

                  (g) Descriptive Headings. The descriptive headings of this
Agreement are inserted for convenience only and do not constitute a part of this
Agreement.

                  (h) Governing Law. All questions concerning the construction,
validity and interpretation of this Agreement and the exhibits and schedules
hereto will be governed by the internal law, and not the law of conflicts, of
New York.

                  (i) Notices. All notices, demands or other communications to
be given or delivered under or by reason of the provisions of this Agreement
shall be in writing and shall be deemed to have been given when delivered
personally to the recipient or by telecopy, one day after being sent to the
recipient by reputable overnight courier service (charges prepaid) or three days
after being mailed to the recipient by certified or registered mail, return
receipt requested and postage prepaid. Such notices, demands and other
communications will be sent to the parties hereto at the addresses indicated on
the signature page hereto and to the Company at the address indicated below:

                           Endorex Corp.
                           900 North Shore Drive
                           Lake Bluff, Illinois  60044
                           Telecopier: 847-604-8570
                           Attention:  President

                           with a copy to:

                           Brobeck, Phleger & Harrison LLP
                           1633 Broadway, 47th Floor
                           New York, New York  10019


<PAGE>   13


                           Telecopier: (212) 586-7878
                           Attention: Richard R. Plumridge, Esq.

                  (j) Termination. This Agreement shall terminate on the date as
of which each Holder has sold all remaining Registrable Securities in a
transaction or transactions of the type described in Section 12 hereof.



                  [Signature page follows]

<PAGE>   14


        IN WITNESS WHEREOF, each of the undersigned has duly executed this
Registration Rights Agreement as of the date first written above.


ENDOREX CORP.


By:   /s/ Michael S. Rosen
     --------------------------------
            Name: Michael S. Rosen
            Title: President/CEO


ELAN INTERNATIONAL SERVICES, LTD.


By:   /s/ Kevin Insley
     --------------------------------
            Name: Kevin Insley
            Title: President/CEO




<PAGE>   1
                                                                       EX. 10.19
                                      CONFIDENTIAL TREATMENT HAS BEEN SOUGHT FOR
                                 PORTIONS OF THIS EXHIBIT PURSUANT TO RULE 24B-2
                           UNDER THE SECURITIES EXCHANGE AC TO 1934, AS AMENDED.





THIS AGREEMENT is made the 22nd day of January 1998




BY AND BETWEEN



ELAN CORPORATION, PLC

An Irish company, of Lincoln House, Lincoln Place, Dublin 2, Ireland


AND



ENDOREX VACCINE DELIVERY TECHNOLOGIES, INC.

A Delaware corporation of 900 North Shore Drive, Lake Buff, Illinois 60044,
United States of America






                               LICENSE AGREEMENT







                                      1


<PAGE>   2

                               TABLE OF CONTENTS



<TABLE>
<CAPTION>

CLAUSE NO.  CLAUSE                                        PAGE NO.
   <S>      <C>                                           <C>

    1       Definitions

    2       Grant of Rights

    3       Improvements

    4       Intellectual Property Rights

    5       Exploitation of Licensed Technology

    6       Financial Provisions

    7       Right of Audit and Inspection

    8       Patents

    9       Confidential Information

    10      Trademarks

    11      Term and Termination

    12      Warranties/Indemnities

    13      Insurance

    14      Impossibility of Performance - Force Majeure

    15      Settlement of Disputes; Proper Law

    16      Assignment

    17      Notices

    18      Miscellaneous Clauses

</TABLE>




                                      2


<PAGE>   3


WHEREAS

A.   Elan is knowledgeable in the discovery, research, development,
     manufacture and marketing of pharmaceutical formulations capable of
     delivering drugs, including oral or mucosal Vaccine delivery.  Elan owns
     or has licensed the Elan Technology.  Elan also owns and uses certain
     trademarks in connection with the manufacture, marketing and sale of such
     compounds, including the Elan Trademarks.

B.   Orasomal has proprietary know-how and expertise relating, inter alia, to
     immunology and is knowledgeable in the discovery, research, development,
     manufacture and marketing of pharmaceutical formulations capable of
     delivering drugs, including oral or mucosal Vaccine delivery.  Orasomal
     owns or has licensed the Orasomal Technology.  Orasomal also owns and uses
     certain trademarks in connection with the manufacture, marketing and sale
     of such compounds, including the Orasomal Trademarks.

C.   Elan and Endorex have agreed to co-operate in the establishment and
     management of the Company, the business of which will be to research and
     develop certain Products incorporating the technologies developed and/or
     to be developed by Elan and Orasomal and to commercialize such Products
     [****].

D.   Simultaneously herewith, Elan, Endorex and Orasomal are entering into the
     Development Agreement for the purpose of recording the terms and
     conditions of the joint venture and of regulating their relationship with
     each other and certain aspects of the affairs of and their dealings with
     the Company.

E.   Under the Development Agreement, the Company shall own all rights in
     technology  developed pursuant to certain Research and Development
     Programs being conducted or to be conducted by the Company or by Orasomal,
     Elan or an Independent Third Party on behalf of the Company, including the
     Company Program Technology, the Orasomal Program Technology and the Elan
     Program Technology.

F.   The Company desires to enter into this Agreement with Elan so as to (a)
     permit the Company to utilize the Elan Patents, the Elan Know-How and the
     Elan Trademarks in the research, development, manufacture, distribution
     and sale of the Products in the Field and (b) to permit Elan to utilise
     the Orasomal Program Technology, the Elan Program Technology and the
     Company Program Technology in connection with (i) Elan's research and
     development work on behalf of the Company and (ii) Elan's manufacturing
     and supplying the Company or its designee(s) with the Products and other
     components.

G.   Simultaneously herewith, the Company and Orasomal are entering into a
     similar license agreement relating to the Company's use of the Orasomal
     Patents, the Orasomal Know-

**** REPRESENTS MATERIAL REACTED PURSUANT TO A REQUEST
FOR CONFIDENTIAL TREATMENT PURSUANT TO RULE 24b-2 UNDER
THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED.




                                      3


<PAGE>   4


     How and the Orasomal Trademarks and Orasomal's use of the Elan Program
     Technology, the Orasomal Program Technology and the Company Program
     Technology.


NOW IT IS HEREBY AGREED AS FOLLOWS:

1.   DEFINITIONS

1.1. In this present Agreement, including the Recitals, Schedules and
     Appendices, the following definitions shall prevail unless the context
     otherwise requires:

"ACQUIRED"         means a transfer or license of a Patent, Know-How or other
                   forms of Intellectual Property Rights or information from an
                   Independent Third Party to Elan or Orasomal, as the case may
                   be, to the extent to which there are no obligations or
                   restrictions  (such as confidentiality) in respect of that
                   information which prohibit disclosure to or use by the
                   Company;

"AFFILIATE"        means any corporation or entity other than the Company
                   controlling, controlled or under the common control of Elan,
                   Orasomal or the Company as the case may be.  For the purpose
                   of this definition, subject to the provisions of Clause
                   11.4. "control" shall mean direct or indirect ownership of
                   fifty percent (50%) or more of the stock or shares entitled
                   to vote for the election of directors;

"AGREEMENT"        means this agreement (which expression shall be deemed to
                   include the Recitals, the Schedules and Appendices hereto);

"BUSINESS PLAN"    means a plan for the business of the Company to be
                   reasonably agreed to by Elan, Orasomal, Endorex and the
                   Company prior to signing this Agreement or as soon
                   thereafter as is practicable and in any event within thirty
                   (30) days of signing this Agreement;

"CLOSING DATE"     means January 22, 1998;

"COMPANY"          means Endorex Vaccine Delivery Technologies, Inc.; ;

"COMPANY PROGRAM
PATENTS"           means the inventions and underlying Patents that constitute
                   the Company Program Technology;




                                      4


<PAGE>   5


"COMPANY PROGRAM
TECHNOLOGY"        shall have the meaning assigned to it in the Development
                   Agreement;

"COMPANY SUBSCRIPTION
AGREEMENT"         means the Subscription and Stockholders' Agreement of
                   Endorex Vaccine Delivery Technologies, Inc., made by and
                   between EIS, Endorex and the Company as of the date hereof;

"DEVELOPMENT
AGREEMENT"         means the Joint Development & Operating Agreement of even
                   date entered into between Orasomal, Elan, EIS, Endorex and
                   the Company;

"EFFECTIVE DATE"   means December 31, 1997;

"EIS"              means Elan International Services Ltd.;

"ELAN"             means Elan Corporation, plc (Elan will be acting through its
                   division Elan Pharmaceutical Technologies);

"ELAN EXCLUDED
TECHNOLOGY"        has the meaning set forth in Schedule 1;


"ELAN KNOW-HOW"    means Elan's drug delivery Know-How (including oral or
                   mucosal Vaccine delivery Know-How) and Know-How relating to
                   oral or mucosal Vaccines, other than the Elan Program
                   Know-How  and the Elan Excluded Technology;


"ELAN PATENTS"     means Elan's drug delivery inventions and underlying Patents
                   (including oral or mucosal Vaccine delivery inventions) and
                   inventions and underlying Patents relating to oral or
                   mucosal Vaccines, other than the Elan Program Patents and
                   the Elan Excluded Technology;

"ELAN PROGRAM
PATENTS"           means the inventions and underlying Patents that constitute
                   Elan Program Technology;

"ELAN PROGRAM
TECHNOLOGY"        has the meaning assigned to it in the Development Agreement;

"ELAN TECHNOLOGY"  means the Elan Patents and/or the Elan Know-How (which
                   exclude the Elan Excluded Technology).  The primary examples
                   of the Elan




                                      5


<PAGE>   6


                   Technology existing as of the Effective Date are set forth
                   on Schedule 1; for the avoidance of doubt the Parties
                   confirm that the said list is not necessarily exhaustive.
                   The Elan Technology also includes the inventions and know
                   how that are the subject of the [****].  For the avoidance
                   of doubt, Elan Technology shall exclude Patents and Know How
                   [****] or [****], including, but not limited to, [****].

"ELAN TRADEMARKS"  means, depending on the context, one or more of the
                   trademarks owned by, Acquired by, assigned or licensed to
                   Elan which are relevant to the Elan Technology or the
                   Products;

"ENDOREX"          means Endorex Corp.;

"FDA"              means the United States Food and Drug Administration or
                   any successors or agency the approval of which is necessary
                   to market a product in the United States of America or any
                   other relevant regulatory authority the approval of which is
                   necessary to market a product in any other country of the
                   Territory;

"FIELD"            shall mean the [****];

"FIRST RIGHT OF
NEGOTIATION"       shall have the meaning assigned to such term in Clause 9.5.
                   of the Development Agreement;

"IMPROVEMENTS"     means inventions, discoveries and developments relating
                   to (A) the Elan Technology that can usefully be applied to
                   the Field, and (B) which were first reduced to practice
                   during the Term by Elan [but shall for the avoidance of
                   doubt exclude Program Technology and the Elan Excluded
                   Technology;

"INDEPENDENT
THIRD PARTY"       means any person other than the Company, Elan, Endorex,
                   Orasomal or any of their respective Affiliates;

"IN-MARKET"        means [****] (or where applicable by [****]) to an [****] 
                   such as a

**** REPRESENTS MATERIAL REACTED PURSUANT TO A REQUEST
FOR CONFIDENTIAL TREATMENT PURSUANT TO RULE 24b-2 UNDER
THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED.







                                      6


<PAGE>   7

                   [****], and shall exclude [****];

"INTELLECTUAL
PROPERTY RIGHTS"   means proprietary rights in Patents, Know-How, registered 
                   and unregistered designs, copyrights, trademarks, trade      
                   dress, and other like legal rights for the protection of
                   intellectual property but shall for the avoidance of doubt
                   exclude the Elan Excluded Technology;

"KNOW-HOW"         means all trade secrets, confidential scientific, technical  
                   and medical information and expertise, technical data and
                   marketing information, studies and data from time to time
                   developed, produced by or on behalf of Elan, Orasomal or the
                   Company, as the case may be, whether before the Effective
                   Date or during the Term including, but not limited to,
                   unpatented inventions, discoveries, theories, plans, ideas
                   (whether or not reduced to practice) relating to the
                   research and development, manufacture, registration for
                   marketing, use or sale of the Product, toxicological,
                   pharmacological, analytical and clinical data,
                   bioavailability studies, product forms and formulations,
                   control assays and specifications, methods of preparation
                   and stability data;

"LISTED COMPANY"   means the companies set forth in Schedule 2 and their 
                   respective controlled (as such term is used in the 
                   definition of Affiliates above) subsidiaries;

"MAJOR COUNTRY"    means those countries of the Territory set forth in 
                   Schedule 3;

"MANAGEMENT
COMMITTEE"         means the management committee appointed by the directors of
                   the Company pursuant to the Development Agreement;

"[****]"           means that certain Proposal Concerning the Exploitation of 
                   Intellectual Property Rights by and between Elan [****] of 
                   which is attached as Schedule 4;

"MIT"              means the Massachusetts Institute of Technology;

"MIT AGREEMENT"    means that certain Patent License Agreement by and
                   between Orasomal and the Massachusetts Institute of
                   Technology dated December 16, 1996 a copy of which is
                   attached to Schedule 3 of the Orasomal License Agreement;

**** REPRESENTS MATERIAL REACTED PURSUANT TO A REQUEST
FOR CONFIDENTIAL TREATMENT PURSUANT TO RULE 24b-2 UNDER
THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED.






                                      7


<PAGE>   8


"MIT PATENTS"        means the Patents licensed by the Massachusetts Institute
                     of Technology pursuant to the MIT Agreement;

"MIT PATENTED
PRODUCT"             means any product or part thereof which: (a) is covered in
                     whole or in part by an issued, unexpired claim in the MIT
                     Patents in the country in which any such product or part
                     thereof is made, used or sold; or (b) is manufactured by
                     using a process or is employed to practice a process which
                     is covered in whole or in part by an issued, unexpired
                     claim in the MIT Patents in the country in which any MIT
                     Patented Process is used or in which such product or part
                     thereof is used or sold;

"MIT PATENTED
PROCESS"             means any process which is covered in whole or in part by
                     an issued, unexpired claim or a pending claim contained in
                     the MIT Patents;

"NET SALES"          means [****];

"ORASOMAL"           means Orasomal Technologies, Inc.;

"ORASOMAL
KNOW-HOW"            means Orasomal's drug delivery Know-How (including oral or
                     mucosal Vaccine delivery Know-How) and Know-How relating
                     to oral or mucosal Vaccines, other than Orasomal Program
                     Know-How;

"ORASOMAL LICENSE
AGREEMENT"           means the license agreement of even date herewith entered
                     into between the Company and Orasomal;

"ORASOMAL PATENTS"   means Orasomal's drug delivery inventions and underlying
                     Patents (including oral or mucosal Vaccine delivery
                     inventions) and inventions and underlying Patents relating
                     to oral or mucosal Vaccines, other than Orasomal Program
                     Technology. The Orasomal Patents include the MIT Patents
                     and are listed on Schedule 1 of the Orasomal License
                     Agreement;





                                      8


<PAGE>   9


"ORASOMAL PROGRAM
PATENTS"             means the inventions and the underlying Patents that
                     constitute Orasomal Program Technology;

"ORASOMAL PROGRAM
TECHNOLOGY"          shall have the meaning assigned to it in the Development
                     Agreement;

"ORASOMAL
TECHNOLOGY"          means the [****] and/or the [****].  The Orasomal
                     Technology also includes [****].  For the avoidance of
                     doubt, Orasomal Technology shall exclude [****], including
                     [****];

"ORASOMAL
TRADEMARKS"          means, depending on the context, one or more of the
                     trademarks and any other relevant trademark owned by,
                     Acquired by, assigned or licensed to Orasomal which are
                     relevant to the Orasomal Technology or the Products;

"PARTIES"            means Elan and the Company;

"PATENTS"            means all and any patents and any applications therefor in
                     the Territory (including any and all divisions,
                     continuations, continuations-in-part, extensions,
                     additions or reissues thereto or thereof);

"PERSON"             means an individual, partnership, corporation, limited
                     liability company, business trust, joint stock company,
                     trust, unincorporated association, joint venture, or other
                     entity of whatever nature;

"PLA"                means the Product License Approval, or its equivalent, as
                     such term is understood by the FDA;

"PRE-EXISTING THIRD
PARTY TECHNOLOGY"    has the meaning set forth in Clause 2.3;

"PRODUCT"            means any [****];

**** REPRESENTS MATERIAL REACTED PURSUANT TO A REQUEST
FOR CONFIDENTIAL TREATMENT PURSUANT TO RULE 24b-2 UNDER
THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED.






                                      9


<PAGE>   10

"PROGRAM
TECHNOLOGY"        has the meaning assigned to it in the Development Agreement;

"RELEVANT EVENT"   has the meaning set forth in Clause 11.3.1;

"RESEARCH AND
DEVELOPMENT
PROGRAM"           means depending on the context, one or more programs of
                   research and development work being conducted or to be
                   conducted by, inter alia, Orasomal and Elan for and on
                   behalf of the Company which have been devised by the
                   Research Committee and approved by the Management Committee;

"TECHNOLOGIES"     means collectively, the Orasomal Technology together with
                   the Elan Technology;

"TERM"             has the meaning set forth in Clause 11.1;

"TERRITORY"        means [****];

"THIRD PARTY
TECHNOLOGY"        has the meaning set forth in Clause 9.5. of the Development
                   Agreement;

"VACCINES"         means a biologically or synthetically derived substance
                   administered to [****]; and
"UNITED STATES
DOLLAR" AND "US$"  means the lawful currency for the time being of the United
                   States of America.


1.2. Words importing the singular shall include the plural and vice versa.

1.3. Unless the context otherwise requires, reference to a recital, article,
     paragraph, provision, clause or schedule is to a recital, article,
     paragraph, provision, clause or schedule of or to this Agreement.

1.4. Reference to a statute or statutory provision includes a reference to it
     as from time to time amended, extended or re-enacted.

1.5. The headings in this Agreement are inserted for convenience only and do
     not affect its construction.

**** REPRESENTS MATERIAL REACTED PURSUANT TO A REQUEST
FOR CONFIDENTIAL TREATMENT PURSUANT TO RULE 24b-2 UNDER
THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED.





                                     10




<PAGE>   11


1.6. Unless the context or subject otherwise requires, references to words in
     one gender include references to the other genders.

1.7. References to "include" or "including" shall be construed as examples
     only, and in no way be read as limiting.


2.   GRANT OF RIGHTS

2.1. Subject to the terms of this Agreement, under all of Elan's existing and
     future Patents and other Intellectual Property Rights covering the Elan
     Technology, Elan hereby grants to the Company for the Term an exclusive
     licence to the Elan Technology in the Field for all research, development,
     and commercial purposes in the Field.  All proprietary rights and rights
     of ownership with respect to the Elan Technology shall at all times remain
     solely with Elan, or where applicable with Elan's licensor.  The Company
     shall not have any rights to use the Elan Technology other than insofar as
     they relate directly to the Field and are expressly granted herein.

2.2. Subject to any restriction in any licenses or other agreements pursuant
     to which Elan licenses any of the Elan Trademarks, Elan hereby grants the
     Company for the Term of this Agreement [****] (or, if applicable,
     sublicense) to use the Elan Trademarks which relate to the Elan Technology
     applicable to the Product, [****], on the terms set forth in Clause 10
     upon or in relation to the promotion, marketing, advertising, sale or
     offering for sale of the Products.  [****] but at Elan's request shall be
     obliged to [****].  For the avoidance of doubt, the Parties hereby confirm
     that the Company shall not be entitled to a licence to use any trademark
     owned or controlled by Elan which identifies a pharmaceutical product.

2.3. Elan shall not be obliged to license Patents or Know-How licensed or
     Acquired by Elan from an Independent Third Party on or before the
     Effective Date ("Pre-existing Third Party Technology") to the Company
     (including, but not limited to, Patents or Know-How owned jointly or
     through a joint venture with [****] and [****]).  In the event that Elan
     considers that such Pre-existing Third Party Technology may have
     application in the Field, Elan shall, subject to contractual constraints,
     review such Pre-existing Third Party Technology with the Company and where
     applicable use its reasonable endeavours to procure an agreement between
     the Company and the applicable Independent Third Party (at the Company's
     cost).  Where applicable Elan may, at its option, license or sub-license
     such Pre-existing Third Party Technology to the Company for the Field,
     subject to the payment by the Company to

**** REPRESENTS MATERIAL REACTED PURSUANT TO A REQUEST
FOR CONFIDENTIAL TREATMENT PURSUANT TO RULE 24b-2 UNDER
THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED.







                                     11


<PAGE>   12


     Elan of such amounts as are payable by Elan to any Independent Third
     Party in respect of the exploitation by the Company of the Pre-existing
     Third Party Technology.

2.4. Elan hereby confirms that prior to the Effective Date it has not licensed
     or Acquired any Patents or Know How in relation to the Field save and
     except for those that are the subject of the [****] and the [****].  Elan
     shall be [****] or under any agreement concluded with [****] Limited as
     envisaged in the [****].

2.5. In addition Elan has entered into a preliminary development agreement
     with an Independent Third Party in relation to the Field, the terms of
     which are subject to confidentiality restrictions.  If such preliminary
     development program is successful, Elan shall seek the consent of the
     Independent Third Party to disclose the results of the formulation
     development program to the Company, and such results shall be deemed Third
     Party Technology and governed by the provisions of Clause 2.9. of this
     Agreement and Clause 9.5. of the Development Agreement.

2.6. Subject to the terms of this Agreement, the Company hereby grants to Elan
     for the Term of this Agreement a [****] license to use the Elan Program
     Technology, Orasomal Program Technology and the Company Program
     Technology, and, subject to the terms and conditions of the Orasomal
     License Agreement, a [****] sublicense to use the Orasomal Technology
     insofar as is necessary, in each case, solely to permit Elan to perform
     its obligations pursuant to this Agreement and the Development Agreement
     for the benefit of the Company, including, without limitation, (a)
     conducting research and development pursuant to the Research and
     Development Programs, and (b) developing, manufacturing and supplying the
     Products and any other chemical or formulation components.  All rights of
     ownership with respect to the Elan Program Technology,  the Orasomal
     Program Technology and the Company Program Technology shall at all times
     remain solely with the Company.

2.7. Elan is entitled to negotiate a license agreement to exploit the Elan
     Program Technology outside the Field in accordance with the provisions of
     Clauses 9.3. and 9.8. of the Development Agreement pursuant to which the
     Company may in the case of Clause 9.3. of the Development Agreement, and
     shall in the case of Clause 9.8. of the Development Agreement grant Elan a
     licence to use the Elan Program Technology.

2.8. The Company shall not be permitted to sublicense any of the rights
     granted to the Company by Elan pursuant to this Agreement without the
     prior written consent of Elan, which consent will not be unreasonably
     withheld or delayed; provided that such reasonableness standard shall not
     be applicable in the case of a proposed sublicense to

**** REPRESENTS MATERIAL REACTED PURSUANT TO A REQUEST
FOR CONFIDENTIAL TREATMENT PURSUANT TO RULE 24b-2 UNDER
THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED.








                                     12



<PAGE>   13


      any Listed Company  However, the Company shall have the right to grant
      a [****] sublicense to the Elan Technology in the Field to Orasomal to
      enable Orasomal to fulfil its obligations pursuant to the Orasomal
      License Agreement and the Development Agreement.  Insofar as the
      obligations owed by the Company to Elan are concerned, the Company shall
      remain responsible for all acts and omissions of any sub-licensee,
      including Orasomal, as if they were by the Company.  In the event of a
      termination of this Agreement due to a breach by the Company, Elan shall
      have the right but not the obligation to assume any such sub-license.

2.9.  Subject to the other provisions of this Agreement and to the provisions
      of [****] of the Development Agreement, [****] (a) for or on behalf of
      the Company, (b) in relation to [****] for which the Company has elected
      not to [****] or has been unable to [****] after the applicable [****]
      has been exercised by the Company, or (c) with the Company's prior
      written consent.  For the avoidance of doubt the Parties confirm that the
      foregoing [****] is applicable to the [****] conducted by [****] through
      its division [****] and shall not apply to [****], including, but not
      limited to, [****] and if it shall become such, [****].

2.10. Elan shall also provide all reasonable assistance to the Company in
      delivering and enabling the Company to utilize the Company's license to
      the Elan Technology.


3.    IMPROVEMENTS

3.1.  Except to the extent prohibited by any undertaking given to any
      Independent Third Party (provided that after the Closing Date each Party
      shall use all commercially reasonably efforts to exclude or minimise the
      extent of any such limitations or restrictions), the licenses to the Elan
      Technology granted by Elan pursuant to Clause 2 shall include the
      Improvements.  If Elan shall develop any Improvements during the Term,
      Elan shall communicate to the Company such Improvements and shall provide
      to the Company such rights, licenses, information and explanations as the
      Company may reasonably require to be able effectively to utilise the
      Improvements for the life of this Agreement.  Such disclosed Improvements
      shall automatically on disclosure to the Company become part of the Elan
      Know-How or Elan Patents (as the case may be) and shall be subject to the
      provisions of this Agreement.  the Company shall not have any right to
      use such Improvements outside the Field.

**** REPRESENTS MATERIAL REACTED PURSUANT TO A REQUEST
FOR CONFIDENTIAL TREATMENT PURSUANT TO RULE 24b-2 UNDER
THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED.








                                     13



<PAGE>   14


4.   INTELLECTUAL PROPERTY RIGHTS

4.1. The respective rights of Elan, the Company and Orasomal to exploit the
     Elan Program Technology, Orasomal Program Technology and the Company
     Program Technology shall be regulated by the provisions of Clause 6 of the
     Development Agreement.


5.   EXPLOITATION OF LICENSED TECHNOLOGY

5.1. Except as provided for in this Agreement, the Company's obligations to
     exploit the Elan Technology shall be regulated by Clause 9 of the
     Development Agreement.

5.2. The Company shall exert its reasonable efforts [****] consistent with the
     [****] in each [****] determined in a commercially reasonable manner and
     with a view to [****].  The Company will diligently pursue the [****], as
     provided in the Business Plan.

5.3. The Company will be solely responsible for ensuring that the manufacture,
     promotion, distribution, marketing and sale of the Products within each
     country of the Territory is in strict accordance with all the legal and
     regulatory requirements of each country of the Territory.

5.4. All advertising, promotional materials and marketing costs needed to
     exploit the Products are to be paid for by the Company.  Any packaging for
     the Products shall contain information to the effect that the Product has
     been developed by Elan in conjunction with Orasomal and the Company and is
     to be agreed upon by Elan in advance.  Such acknowledgement shall take
     into consideration regulatory requirements and the Company's reasonable
     commercial requirements.  The Company shall submit copies of all forms of
     trade package cartons and labels and other printed materials to Elan for
     approval before commercial sale of the Product commences.  If a change in
     such materials from that initially approved which would require regulatory
     approval or filing or any other material change is proposed, all such
     package cartons and labels and printed materials shall be resubmitted for
     approval before commercial use thereof.  It shall be presumed that Elan
     approved of such use unless Elan provides written notice of disapproval of
     such use to the Company within ten (10) business days of delivery of such
     materials to Elan, such approval not to be unreasonably withheld.  The
     further consent of Elan shall not be required where the format and content
     of such materials is substantively similar as the materials previously
     furnished to and approved by Elan.


**** REPRESENTS MATERIAL REACTED PURSUANT TO A REQUEST
FOR CONFIDENTIAL TREATMENT PURSUANT TO RULE 24b-2 UNDER
THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED.







                                     14


<PAGE>   15


6.   FINANCIAL PROVISIONS

6.1. In consideration of the rights and licences granted to the Company
     pursuant to this Agreement, the Company shall pay the following amounts to
     Elan in the manner and on the dates set forth below:

     6.1.1.  [****]
     
     6.1.2.  [****];
     
     6.1.3.  [****]
     
     6.1.4.  [****].

6.2. In consideration of the rights and licences granted to the Company
     pursuant to this Agreement, the Company shall [****] of any and all [****]
     received by the Company to Elan; provided, that Elan's [****] of the
     aggregate of [****] shall not be less than [****]without Elan's prior
     consent, unless the Company shall establish, to Elan's reasonable
     satisfaction, consistent with then-current prudent and customary business
     standards, that an aggregate [****] of less than [****] is necessary in
     order to enable the Company to commercialize the subject Product without
     undue hardship; provided further, that the Company shall use commercially
     reasonable good faith efforts to seek to obtain the [****] on a case-by
     case basis.

6.3. In the event that Elan shall cease to be a shareholder of the Company,
     the Parties shall negotiate in good faith such amendments to the Agreement
     as are equitable and applicable having regard to the fact that Elan no
     longer has any representation on the Board of Directors of the Company or
     the Management Committee (for example the royalty provisions and such
     provisions of the Development Agreement as are applicable), provided that
     such negotiations shall not apply to the existence of the Agreement.

6.4. Payment of royalties shall be made quarterly within forty-five (45) days
     after the expiry of the calendar quarter.  The method of payment shall be
     by way of wire transfer to an account specified by Elan. Each payment made
     to Elan shall be accompanied by a

**** REPRESENTS MATERIAL REACTED PURSUANT TO A REQUEST
FOR CONFIDENTIAL TREATMENT PURSUANT TO RULE 24b-2 UNDER
THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED.







                                     15



<PAGE>   16


      written report, prepared and signed by a senior financial officer of the
      Company.  In addition the report shall clearly show the Net Sales for the
      months of the calendar quarter for which payment is being made on a
      country by country basis.  In the event that no royalty is due to Elan
      for any calendar quarter, the senior financial officer shall so report.
      In addition to the written reports accompanying each payment, the Company
      shall notify Elan, within thirty (30) days of the end of each calendar
      quarter, of the Net Sales of the Product(s) for that preceding quarter on
      a country by country basis.

6.5.  The Company shall maintain and keep clear, detailed, complete, accurate
      and separate records so:

      6.5.1. as to enable any royalties on Net Sales of a Product which shall
             have accrued hereunder to be determined; and

      6.5.2. that any deductions made in arriving at the Net Sales of a Product
             can be determined.

6.6.  All payments due hereunder shall be made in United States Dollars.
      Payments due on Net Sales of the Product made in a currency other than
      United States Dollars shall first be calculated in the foreign currency
      and then converted to United States Dollars on the basis of the exchange
      rate in effect for the purchase of United States Dollars with such
      foreign currency quoted in the Wall Street Journal (or comparable
      publication if not quoted in the Wall Street Journal) with respect to the
      currency of the country of origin of such payment for the day prior to
      the date on which the payment by the Company is being made.

6.7   Subject to the provisions of Clauses 6.8. and 6.10. of this Agreement,
      the Company shall pay all royalties at the full rates specified in this
      Clause 6.

6.8.  If, at any time, legal restrictions in the Territory prevent the prompt
      payment of royalties or any portion thereof, the Parties shall meet to
      discuss suitable and reasonable alternative methods of reimbursing Elan
      the amount of such running royalties. In the event that the Company is
      prevented from making any payment under this Agreement by virtue of the
      statutes, laws, codes or government regulations of the country from which
      the payment is to be made, then such payments may be paid by depositing
      them in the currency in which they accrue to Elan's account in a bank
      acceptable to Elan in the country the currency of which is involved or as
      otherwise agreed by the Parties.

6.9.  Elan and the Company agree to co-operate in all respects reasonably
      necessary to take advantage of any double taxation agreements or similar
      agreements as may, from time to time, be available.






                                     16


<PAGE>   17


6.10. Any taxes payable by Elan on any payment made to Elan pursuant to this
      Agreement shall be for the account of Elan.  If so required by applicable
      law any payment made pursuant to this Agreement shall be made by the
      Company after deduction of the appropriate withholding tax in which event
      the Parties shall co-operate to the extent reasonably necessary to obtain
      the appropriate tax credits as soon as is practicable. In the event of a
      credit, the Company shall forthwith forward copies of the credit
      documentation to Elan.


7.    RIGHT OF AUDIT AND INSPECTION

7.1.  On not more than two times in each calendar year, the Company shall
      permit Elan or its duly authorised representatives upon reasonable notice
      and at any reasonable time during normal business hours to have access to
      inspect and audit the accounts and records of the Company and any other
      book, record, voucher, receipt or invoice relating to the calculation of
      the royalty payments on Net Sales submitted to Elan and to the accuracy
      of the reports which accompanied them.  Any such inspection of the
      Company's records shall be at the expense of Elan, except that if any
      such inspection reveals a deficiency in the amount of the running royalty
      actually paid to Elan hereunder in any calendar quarter of [****] or more
      of the amount of any running royalty actually due to Elan hereunder, then
      the expense of such inspection shall be borne solely by the Company.  Any
      amount of deficiency shall be paid promptly to Elan.  If such inspection
      reveals a surplus in the amount of running royalty actually paid to Elan
      by the Company, Elan shall promptly reimburse the Company the surplus.
      The Company shall maintain the foregoing records for a period of at least
      five (5) years following the end of the calendar year to which they
      pertain.

7.2.  In the event of any unresolved dispute regarding any alleged deficiency
      or overpayment of royalty payments hereunder, the matter will be referred
      to an independent firm of chartered accountants for a resolution of such
      dispute mutually acceptable to both parties.  Any decision by the said
      firm of chartered accountants shall be binding on the Parties.

8.    PATENTS

8.1.  The Company shall permanently mark or otherwise cause Orasomal or any
      Independent Third Party to permanently mark all Products and/or the
      packaging therefor with such license or patent notices and in such manner
      as Elan may reasonably request in writing prior to the sale or commercial
      use thereof.

8.2.  Elan shall be obliged to disclose promptly to the Company inventions
      and discoveries made by or on behalf of Elan otherwise than in connection
      with the performance of a

**** REPRESENTS MATERIAL REACTED PURSUANT TO A REQUEST
FOR CONFIDENTIAL TREATMENT PURSUANT TO RULE 24b-2 UNDER
THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED.







                                     17


<PAGE>   18


     Research and Development Program (which inventions and discoveries
     shall be regulated by the provisions of the Development Agreement), any
     patentable inventions and discoveries within the Elan Know-How which
     relate to the Field as well as any Improvements developed by or on behalf
     of Elan.

8.3. The Parties shall discuss in good faith all material issues relating to
     filing, prosecution and maintenance of Elan Patents (insofar as the Elan
     Patents are of relevance to the Field), the Elan Program Patents, any
     patentable inventions and discoveries within the Elan Know-How that relate
     to the Field and any Improvements developed by or on behalf of Elan (other
     than pursuant to one or more of the Research and Development Programs).
     Subject to agreement to the contrary the following provisions shall apply:

     8.3.1. Elan [****] shall have the right but shall not be obligated (a)
            to secure the grant of any patent from applications within the Elan
            Patents that relate to the Field; (b) to file and prosecute patent
            applications on patentable inventions and discoveries within the
            Elan Know-How that relate to the Field and patentable Improvements
            developed by or on behalf of Elan (other than pursuant to one or
            more of the Research and Development Programs); (c) to defend all
            such applications against Independent Third Party oppositions;
            and/or (d) to maintain in force any issued letters patent within
            the Elan Patents that relate to the Field (including any letters
            patent that may issue covering any Improvements).  Elan shall have
            the sole right in its reasonable business discretion to control
            such filing, prosecution, defence and maintenance; provided
            however, that the Company  shall be provided with copies of all
            documents relating to such filing, prosecution, defence, and
            maintenance in sufficient time to review such documents and comment
            thereon prior to filing of such documents.

     8.3.2. In the event that Elan (i) elects that it does not intend to
            file patent applications on patentable inventions and discoveries
            within the Elan Know-How that relate to the Field or patentable
            Improvements developed by or on behalf of Elan (other than pursuant
            to one or more of the Research and Development Programs) in one or
            more countries in the Territory, (ii) fails to file such an
            application within a reasonable period of time, or (iii) elects or
            fails to maintain or prosecute further any such pending application
            or issued patent then Elan shall so notify the Company in writing
            no less than two (2) months prior to the expiration of any
            applicable due date or time bar, and after receipt of such notice,
            the Company shall have the right, but not the obligation, at the
            Company's sole expense to file and prosecute such patent
            application(s) in the joint names of the Company and Elan, and Elan
            upon written request from the Company shall execute all documents,
            forms and declarations and to do all things as shall be reasonably
            necessary to enable the Company to exercise such option and right.

     8.3.3. In relation to the Elan Program Patents, the Company at its 
            expense shall have the right but shall not be obligated (a) to
            secure the grant of any patent from

**** REPRESENTS MATERIAL REACTED PURSUANT TO A REQUEST
FOR CONFIDENTIAL TREATMENT PURSUANT TO RULE 24b-2 UNDER
THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED.



                                     18



<PAGE>   19

            applications within the Elan Program Patents; (b) to file and
            prosecute patent applications on patentable inventions and
            discoveries within the Elan Program Know-How; (c) to defend all
            such applications against Independent Third Party oppositions;  and
            (d) to maintain in force any issued letters patent within the Elan
            Program Patents (including any patents that issue on patentable
            inventions and discoveries within the Elan Program Know-How).  The
            Company shall have the right to control such filing, prosecution,
            defence and maintenance; provided however Elan and Orasomal shall
            be provided with copies of all documents relating to such filing,
            prosecution, defence, and maintenance in sufficient time to review
            such documents and comment thereon prior to filing of such
            documents.

     8.3.4. In the event that the Company (i) elects that it does not
            intend to file patent applications on patentable inventions and
            discoveries within the Elan Program Know-How, (ii) fails to file
            such an application within a reasonable period of time or, (iii)
            elects or fails to maintain or prosecute further any such pending
            application or issued patent then the Company shall so notify Elan
            in writing no less than two (2) months prior to the expiration of
            any applicable due date or time bar, and after receipt of such
            notice, Elan shall, insofar as it is necessary to enable Elan to
            exploit the Elan Program Know-How pursuant to Clauses 2.6. and 2.7.
            of this Agreement or Clause 6.5. of the Development Agreement, have
            the right, but not the obligation at Elan's sole expense to file
            and prosecute such patent application(s) in the Company's name and
            the Company upon written request from Elan shall execute all
            documents, forms and declarations and to do all things as shall be
            reasonably necessary to enable Elan to exercise such option and
            right.  In the event that Elan and the Company negotiate a license
            to enable Elan to exploit the Elan Program Technology outside the
            Field pursuant to Clause 6.5. of the Development Agreement, the
            Parties shall take the patent related expenditures incurred by Elan
            as referred to above into account to the extent they are incurred
            in relation to the Patents being licensed to Elan in determining
            the royalty payable by Elan to the Company.  Notwithstanding
            anything herein to the contrary, the Parties agree that the Company
            shall own all right, title and interest in such patent applications
            and any patents that may issue thereon (including any and all
            divisions, continuations, continuations-in-part, extensions,
            additions or reissues thereto or thereof).  Insofar as any patent
            filing has application within and outside the Field, the Company
            and Elan will negotiate, in good faith, on the course of action to
            be taken.

8.4. Elan and the Company shall promptly inform the other in writing of any
     alleged infringement of any Patents within the Elan Patents that relate to
     the Field, the Elan Program Patents, the Orasomal Program Patents, or the
     Company Program Patents or any alleged misappropriation of trade secrets
     within the Elan Know-How that relate to the Field, the Elan Program
     Know-How, the Orasomal Program Know-How or the




                                     19


<PAGE>   20


      Company Program Technology by an Independent Third Party of which it
      becomes aware and provide the other with any available evidence of such
      infringement or misappropriation.

      8.4.1. During the Term, the Company shall have the right to bring suit
             or otherwise take action at its own expense and for its own
             benefit any such alleged infringements of the Elan Patents or
             misappropriation of the Elan Know-How, insofar as such
             infringements or misappropriation relate to the Field.  In the
             event that the Company takes such action, the Company shall do so
             at its own cost and expense.  At the Company's request, Elan will
             co-operate with such action insofar as the said action relates to
             the Field at the Company's sole cost and expense.  Any recovery
             remaining after the deduction by the Company of the reasonable
             expenses (including attorney's fees and expenses) incurred in
             relation to such an infringement proceeding shall constitute Net
             Sales for the purpose of this Agreement and the Orasomal License
             Agreement and prior to commencing, or at an early stage in the
             proceedings, the Company, Elan and Orasomal shall agree upon the
             royalty that shall be due to each of Elan and Orasomal in respect
             of such deemed  Net Sales. Should the Company decide not to pursue
             such infringers, within a reasonable period but in any event (i)
             within sixty (60) days after receiving written notice of such
             alleged infringement or misappropriation or (ii) ten (10) days
             before the time limit, if any, set forth in the appropriate laws
             and regulations for the filing of such actions, whichever comes
             first, or if such alleged infringement or misappropriation does
             not relate to the Field, Elan may in its discretion initiate such
             proceedings in its own name, at its expense and for its own
             benefit, and at Elan's request, the Company will co-operate with
             such action at Elan's sole cost and expense.  In the alternative,
             the Parties may agree to institute such proceedings in their joint
             names and shall reach agreement as to the proportion in which they
             will share the proceeds of any such proceedings, and the expense
             of any costs not recovered, or the costs or damages payable to the
             Independent Third Party.  If the infringement of the Elan Patents
             affects the Field as well as other products being developed or
             commercialised by Elan or its commercial partners outside the
             Field, the Parties shall agree as to the manner in which the
             proceedings should be instituted and shall reach agreement as to
             the proportion in which they will share the proceeds of any such
             proceedings, and the expense of any costs not recovered, or the
             costs or damages payable to the Independent Third Party.

      8.4.2. During the Term, the Company shall have the first right but not
             the obligation to bring suit or otherwise take action against any
             alleged infringement of the Elan Program Patents or the Company
             Program Patents (and as appears from Clause 8.4.2. of the Orasomal
             License Agreement, the Orasomal Program Patents) or alleged
             misappropriation of the Elan Program Know-How (and as appears from





                                     20


<PAGE>   21


             Clause 8.4.2. of the Orasomal License Agreement, the Orasomal
             Program Know-How) within the Field.  If any such alleged
             infringement or misappropriation occurs which gives rise to a
             cause of action both inside and outside the Field, the Parties
             shall negotiate, together with Orasomal, in good faith to
             determine the cause of action to be taken.  In the event that the
             Company takes such action, the Company shall do so solely at its
             own cost and expense.  At the Company's request, Elan will
             co-operate with any such action at the Company's sole cost and
             expense.  Any recovery remaining after the deduction by the
             Company of the reasonable expenses (including attorney's fees and
             expenses) incurred in relation to such an infringement proceeding
             shall constitute Net Sales for the purpose of this Agreement and
             the Orasomal License Agreement and prior to commencing, or at an
             early stage in the proceedings, the Company, Elan and Orasomal
             shall agree upon the royalty that shall be due to each of Elan and
             Orasomal in respect of such deemed Net Sales.  In the event that
             the Company decides not to take such action against such
             infringement or misappropriation or fails to do so within a
             reasonable period but in any event (i) within sixty (60) days
             after receiving written notice of such alleged infringement or
             misappropriation or (ii) ten (10) days before the time limit, if
             any, set forth in the appropriate laws and regulations for the
             filing of such actions, whichever comes first, Elan may in its
             discretion initiate such proceedings in its own name regarding the
             Elan Program Technology (or in the Company's name if required by
             law; provided, however, that Elan identifies itself as the real
             party in interest and does not take any action that would expose
             the Company to liability of any kind).  In the event that Elan
             initiates such action, it shall do so solely at its sole cost and
             expense and all damages and monetary award recovered in or with
             respect to such action shall be the property of Elan.  At Elan's
             request, the Company agrees to co-operate with Elan in any such
             proceeding at Elan's sole cost and expense.  In the alternative,
             the Parties may agree to institute such proceedings in their joint
             names and shall reach agreement as to the proportion in which they
             will share the proceeds of any such proceedings, and the expense
             of any costs not recovered, or the costs or damages payable to the
             Independent Third Party.

8.5. In the event that a claim or proceedings are brought against the Company
     by an Independent Third Party alleging that the sale, distribution or use
     of the Product in the Territory solely because of the Company's use of the
     Elan Technology infringes the intellectual property rights of such an
     Independent Third Party, the Company shall promptly advise Elan of such
     threat or suit.

8.6. Elan shall have no liability to the Company whatsoever or howsoever
     arising for any losses incurred by the Company as a result of having to
     cease selling Product or having to defer the launch of selling Product as
     a result of any infringement proceedings.





                                     21


<PAGE>   22


9.   CONFIDENTIAL INFORMATION

9.1. The Parties acknowledge that it may be necessary, from time to time, to
     disclose to each other confidential and/or proprietary information,
     including without limitation, the Technologies, Program Technology,
     Improvements and the Patents relating thereto, inventions, works of
     authorship, trade secrets, specifications, designs, data, know-how and
     other information relating to [****], the terms of the Definitive
     Documents, the Products, processes and services, or the business of the
     disclosing Party ("Confidential Information").

     Confidential Information shall be deemed not to include:

     (i)   information that is in the public domain;

     (ii)  information which is made public by the disclosing Party;

     (iii) information which is independently developed by a Party without the
           aid or application of the Confidential Information;

     (iv)  information that is published or otherwise becomes part of the 
           public domain without any disclosure by a Party, or on the part of 
           a Party's directors, officers, agents, representatives or employees;

     (v)   information that becomes available to a Party on a non-confidential
           basis, whether directly or indirectly, from a source other than a 
           Party, which source, to the best of the Party's knowledge, did not 
           acquire this information on a confidential basis; or

     (vi)  information which the receiving Party is required to disclose
           pursuant to:

           (A)  a valid order of a court or other governmental body or any 
                political subdivision thereof or otherwise required by law; or
           
           (B)  other requirement of law; provided that if the receiving Party  
                becomes legally required to disclose any confidential
                information, the receiving Party shall give the disclosing
                Party prompt notice of such fact so that the disclosing Party
                may obtain a protective order or other appropriate remedy
                concerning any such disclosure.  The receiving Party shall
                fully co-operate with the disclosing Party in connection with
                the disclosing Party's efforts to obtain any such order or
                other remedy.  If any such order or other remedy does not fully
                preclude disclosure, the receiving Party shall make such
                disclosure only to the extent that such disclosure is legally
                required.

**** REPRESENTS MATERIAL REACTED PURSUANT TO A REQUEST
FOR CONFIDENTIAL TREATMENT PURSUANT TO RULE 24b-2 UNDER
THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED.



                                     22


<PAGE>   23


9.2. Any Confidential Information revealed by a Party to another Party shall
     be used by the receiving Party exclusively for the purposes of fulfilling
     the receiving Party's obligations under this Agreement and the Development
     Agreement and for no other purpose.

9.3. Each Party agrees to disclose Confidential Information of another Party
     only to those employees, representatives and agents requiring knowledge
     thereof in connection with their duties directly related to the fulfilling
     of the Party's obligations under this Agreement.  Each Party further
     agrees to inform all such employees, representatives and agents of the
     terms and provisions of this Agreement and their duties hereunder and to
     obtain their consent hereto as a condition of receiving Confidential
     Information.  Each Party agrees that it will exercise the same degree of
     care, but in no event less than a reasonable degree, and protection to
     preserve the proprietary and confidential nature of the Confidential
     Information disclosed by a Party, as the receiving Party would exercise to
     preserve its own proprietary and confidential information.  Each Party
     agrees that it will, upon request of a Party, return all documents and any
     copies thereof containing Confidential Information belonging to or
     disclosed by, such Party.

9.4. Notwithstanding the above, each Party may use or disclose confidential
     information disclosed to it by another Party to the extent such use or
     disclosure is reasonably necessary in filing or prosecuting patent
     applications, prosecuting or defending litigation, complying with patent
     applications, prosecuting or defending litigation, complying with
     applicable governmental regulations or otherwise submitting information to
     tax or other governmental authorities, conducting clinical trials, or
     making a permitted sub-license or otherwise exercising its rights
     hereunder, provided that if a Party is required to make any such
     disclosure of the other Party's confidential information, other than
     pursuant to a confidentiality agreement, such Party shall inform the other
     Party, allow the other Party to participate in the process and generally
     limit disclosure to the greatest extent possible and seek confidential
     treatment or a protective order.

9.5. The provisions relating to confidentiality in this Clause 9 shall remain
     in effect during the Term, and for a period of [****] following the
     expiration or earlier termination of this Agreement.

9.6. The Parties agree that the obligations of this Clause 9 are necessary and
     reasonable in order to protect the Parties' respective businesses, and
     each Party expressly agrees that monetary damages would be inadequate to
     compensate a Party for any breach by the other Party of its covenants and
     agreements set forth herein.  Accordingly, the Parties agree and
     acknowledge that any such violation or threatened violation will cause
     irreparable injury to a Party and that, in addition to any other remedies
     that may be available, in law and equity or otherwise, any Party shall be
     entitled to obtain injunctive

**** REPRESENTS MATERIAL REACTED PURSUANT TO A REQUEST
FOR CONFIDENTIAL TREATMENT PURSUANT TO RULE 24b-2 UNDER
THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED.




                                     23


<PAGE>   24

      relief against the threatened breach of the provisions of this Clause 9,
      or a continuation of any such breach by the other Party, specific
      performance and other equitable relief to redress such breach together
      with its damages and reasonable counsel fees and expenses to enforce its
      rights hereunder, without the necessity of proving actual or express
      damages.


10.   TRADEMARKS

10.1. The Company undertakes that all Products and all materials utilised in
      connection with the provision, marketing, distribution, advertising
      and/or marketing thereof that bear or incorporate the Elan Trademarks
      shall be of a consistent and high standard of quality, commensurate with
      the prestige of the Elan Trademarks and that its use of the Elan
      Trademarks shall conform to such reasonable standards as Elan shall from
      time to time specify.  The Company shall co-operate fully with the
      reasonable instructions of Elan with respect to the maintenance of such
      standards.

10.2. The Company shall:

      10.2.1. subject to the agreement of the Company's commercial partner
              such as a sub-licensee, favourably consider promoting and using
              the Elan Trademarks in each country of the Territory and provide
              proof of use of the Elan Trademarks if requested by Elan;

      10.2.2. use the Elan Trademarks strictly in compliance with any
              applicable trademark and other laws and regulations and to use
              such legends, markings and notices in connection therewith as are
              required by law or otherwise reasonably required by Elan to
              protect Elan's rights therein;

      10.2.3. do nothing to mislead the public as to the nature or quality of
              any Product on which the Elan Trademarks are affixed nor use it
              on advertising or display materials which are unethical, immoral
              or offensive to good taste;

      10.2.4. at Elan's reasonable request, supply samples of the Products
              and any materials utilized in connection with the distribution,
              advertising and/or marketing thereof that bear or incorporate the
              Elan Trademarks for inspection by Elan;

      10.2.5. not adopt or seek to register any trademark, design or logo
              confusingly similar to the Elan Trademarks without Elan's prior
              written consent; and

      10.2.6. promptly notify Elan in writing if any alleged infringement or
              unauthorized use  of the Elan Trademarks comes to the Company's
              attention.






                                     24


<PAGE>   25

10.3. The Company undertakes to use the Elan Trademarks in relation only to
      the Products (or materials for advertising and promotion thereof), and in
      accordance with any reasonable specifications and directions given by
      Elan from time to time.  In particular, but without limitation, the
      Company agrees to state on the Products or materials for the advertising
      or promotion thereof that the Elan Trademarks are used under license from
      Elan.

10.4. The Company shall take no action which could prejudice the validity,
      re-registration or reputation of the Elan Trademarks or which could
      impair the reputation, business standing or prestige of Elan.

10.5. Elan shall remain the owner of the Elan Trademarks and the goodwill
      associated with the same and the Company agrees not to assert any
      ownership interest in the Elan Trademarks or the goodwill associated
      therewith.  The Company shall own and retain all right, title, and
      interest in and to any trademark or trademarks (other than the Elan
      Trademarks and the Orasomal Trademarks) used in the Territory in
      connection with the sale of the Products.

10.6. Elan shall have the exclusive right to take such action in respect of
      the registration, defence, infringement and maintenance of the Elan
      Trademarks as Elan in its reasonable business judgement deems
      appropriate. The Company shall provide all such assistance and
      co-operation, including the furnishing of documents and information and
      the execution of registered user documentation or the like, as may be
      required to give effect to any action as may be taken, or required to be
      taken, by Elan. In taking any such action, Elan shall consider the
      legitimate commercial interests of the Company.

10.7. [****].  New trademarks used in relation to the Elan Technology and all
      registrations thereof and applications therefor shall be owned and
      registered by Elan and shall constitute Elan Trademarks.


11.   TERM AND TERMINATION

11.1. This Agreement is concluded for a period commencing as of the Effective
      Date and [****] and on a [****] on the later to occur of:

      11.1.1. [****] starting from the date of the [****] in the [****]
              concerned; and

**** REPRESENTS MATERIAL REACTED PURSUANT TO A REQUEST
FOR CONFIDENTIAL TREATMENT PURSUANT TO RULE 24b-2 UNDER
THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED.




                                     25


<PAGE>   26

        11.1.2. [****].

11.2.   At the end of the Term, [****].

11.3.1. For the purpose of this Clause 11.3, a "Relevant Event" is committed by
        Elan or the Company if:

        (i)   it commits a material breach of its obligations under this
              Agreement and fails to remedy it within sixty (60) days of being
              specifically required in writing to do so by the other Party;
              provided, however, that if the breaching Party has proposed a
              course of action to rectify the breach and is acting in good
              faith to rectify same but has not cured the breach by the
              sixtieth (60th) day, such rectifying period shall be extended by
              an amount of time as is reasonably necessary to permit the breach
              to be rectified;

        (ii)  it ceases , wholly or substantially, to carry on its business,
              other than for the purpose of a reorganization, without the prior
              written consent of the other Participant (such consent not to be
              unreasonably withheld);

        (iii) the voluntary appointment of a liquidator, receiver, 
              administrator, examiner, trustee or similar officer over all or
              substantially all of its assets under the laws of such
              Participant's state or country of incorporation; or

        (iv)  an application or petition for bankruptcy, corporate
              reorganization, composition, administration, examination,
              arrangement or any other procedure similar to any of the
              foregoing under the laws of such Participant's state or country
              of incorporation, is filed, and is not discharged within ninety
              (90) days.

11.3.2. If either Party commits a Relevant Event, the other Party shall have 
        in addition to all other legal and equitable rights and remedies
        hereunder, the right to terminate this Agreement upon thirty (30) days'
        written notice; provided, that such written notice be given within
        sixty (60) days following the date that the other Party becomes aware
        of the Relevant Event.


11.4.   In the event that (a) [****], or otherwise [****] their management or
        business, or (b) [****] or more of the [****], or otherwise [****],

**** REPRESENTS MATERIAL REACTED PURSUANT TO A REQUEST
FOR CONFIDENTIAL TREATMENT PURSUANT TO RULE 24b-2 UNDER
THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED.






                                     26


<PAGE>   27

      [****] or [****] with any of such entities, [****] if Elan provides
      written notice of its election to so terminate within [****] of the date
      on which Elan [****] , or should [****], of the event; provided, however,
      that the foregoing shall not apply in [****] by Elan or Endorex as
      contemplated by the Company Subscription Agreement.

11.5. Upon [****] as specified in [****]. inclusive or elsewhere within the
      Agreement, this Agreement shall, subject to the other provisions of the
      Agreement, [****] and be of [****].

11.6. Upon expiration or termination of the Agreement:

      11.6.1. any sums that were due from the Company to Elan on Net Sales in
              the Territory or in such particular country or countries in the
              Territory (as the case may be) prior to the expiration or
              termination of this Agreement as set forth herein shall be paid
              in full within sixty (60) days of the expiration or termination
              of this Agreement for the Territory or for such particular
              country or countries in the Territory (as the case may be);

      11.6.2. all confidentiality provisions set out herein shall remain in
              full force and effect;

      11.6.3. the rights of inspection and audit set out in Clause 7 shall
              continue in force for a period of one year;

      11.6.4. except as expressly provided for under Clause 11.6.5. all
              rights, licenses and sublicenses granted in and pursuant to this
              Agreement shall cease for the Territory or for such particular
              country or countries in the Territory (as the case may be). 
              Following such expiration or termination, the Company may not
              thereafter, except as expressly provided for in Clause 11.6.5,
              use in the Territory or in such particular country or countries
              in the Territory (as the case may be) (a) any valid and unexpired
              Elan Patents, (b) any Elan Know-How that remains confidential or
              otherwise proprietary to Elan, and/or (c) any Elan Trademarks;
              and

      11.6.5. the Company shall promptly make an accounting to Elan of the
              inventory of the Product which it has in the Territory or for
              such particular country or countries in the Territory (as the
              case may be), if any, as of the date of such termination and the
              Company shall thereafter have the right for a period of six (6)
              months after said expiration or termination to sell such
              inventory of the Product in the Territory or in such particular
              country or countries in the Territory (as the case

**** REPRESENTS MATERIAL REACTED PURSUANT TO A REQUEST
FOR CONFIDENTIAL TREATMENT PURSUANT TO RULE 24b-2 UNDER
THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED.





                                     27


<PAGE>   28

              may be) or, if appropriate and legally permissible, to transport  
              such inventory of Product for sale in another country or
              countries in the Territory within such six month period; provided
              that the Net Sales thereof shall be subject to the royalty
              provisions of Clause 6 and so payable to Elan.  Thereafter, any
              remaining inventory of  Product shall be disposed of by mutual
              agreement of the Parties in accordance with regulatory
              requirements.


12.   WARRANTIES/INDEMNITIES

12.1. Elan represents and warrants to the Company that to Elan's best
      knowledge, after reasonable investigations, (a) Elan has the right to
      grant the licenses and rights granted herein, (b) Schedule 1 contains a
      summary of the Elan Technology existing as of the Effective Date, (c)
      other than [****] there are no agreements with any third parties that
      relate to Elan Technology existing as of Effective Date, (d) that to the
      best of its knowledge and belief, Elan is not in breach or threatened     
      breach of the [****] and will in the future not procure a breach and (e)
      there are no agreements with any Independent Third Parties that conflict
      with the rights granted by Elan pursuant to this Agreement.

12.2. Elan represents and warrants to the Company that it has the sole,
      exclusive and unencumbered right to grant the licenses and rights herein
      granted to the Company, and that it has not granted any option, license,
      right or interest in or to the Elan Technology to any Independent Third
      Party which would conflict with the rights granted by this Agreement.

12.3. The Company represents and warrants to Elan that it has the sole,
      exclusive and unencumbered right to grant the licenses and rights herein
      granted to Elan and that it has not granted any option, license, right or
      interest in or to the Elan Program Technology, the Orasomal Program
      Technology or the Company Program Technology to any Independent Third
      Party which would conflict with the rights granted by this Agreement.

12.4. Elan represents and warrants to the Company that to the best of its
      knowledge, the true inventors of the subject matter claimed are named in
      the Elan Patents and all such inventors have irrevocably assigned all
      their rights and interests therein to Elan.

12.5. Elan and the Company each represent and warrant to and for the benefit
      for each other that the execution of this Agreement by them and the full
      performance and enjoyment of the rights of them under this Agreement will
      not breach the terms and conditions of any license, contract,
      understanding or agreement, whether express, implied, written or oral
      between them and any Independent Third Party.

**** REPRESENTS MATERIAL REACTED PURSUANT TO A REQUEST
FOR CONFIDENTIAL TREATMENT PURSUANT TO RULE 24b-2 UNDER
THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED.





                                     28


<PAGE>   29

12.6. In addition to any other indemnifications provided for herein, Elan
      shall indemnify and hold harmless the Company and its Affiliates and
      their respective employees, agents, partners, officers and directors from
      and against any claims, losses, liabilities or damages (including
      reasonable attorney's fees and expenses) incurred or sustained by the
      Company arising out of or in connection with any breach of any
      representation, covenant, warranty or obligation by Elan hereunder.

12.7. In addition to any other indemnifications provided for herein, the
      Company shall indemnify and hold harmless Elan and its Affiliates and
      their respective employees, agents, partners, officers and directors from
      and against any claims, losses, liabilities or damages (including
      reasonable attorney's fees and expenses) incurred or sustained by Elan
      arising out of or in connection with any breach of any representation,
      covenant, warranty or obligation by the Company hereunder.

12.8. The Company shall assume the sole and entire responsibility and shall
      indemnify and save harmless Elan from any and all claims, liabilities,
      expenses, including reasonable attorney's fees, responsibilities and
      damages by reason of any claim, proceedings, action, liability or injury
      arising out of any faults of the Product resulting from the transport,
      packaging, storage, handling, distribution, marketing or sale of the
      Product by the Company, to the extent that it was caused by the
      negligence or wrongful acts or omissions on the part of the Company.

12.9. As a condition of obtaining an indemnity in the circumstances set out
      above, the Party seeking an indemnity shall:

      12.9.1. fully and promptly notify the other Party of any claim or
              proceeding, or threatened claim or proceeding;

      12.9.2. permit the indemnifying Party to take full care and control of
              such claim or proceeding;

      12.9.3. co-operate in the investigation and defence of such claim or
              proceeding;

      12.9.4. not compromise or otherwise settle any such claim or proceeding
              without the prior written consent of the other Party, which
              consent shall not be unreasonably withheld conditioned or
              delayed; and

      12.9.5. take all reasonable steps to mitigate any loss or liability in
              respect of any such claim or proceeding.







                                     29


<PAGE>   30


12.10. NOTWITHSTANDING ANYTHING TO THE CONTRARY IN THIS AGREEMENT, ELAN AND
       NEWCO SHALL NOT BE LIABLE TO THE OTHER BY REASON OF ANY REPRESENTATION
       OR WARRANTY, CONDITION OR OTHER TERM OR ANY DUTY OF COMMON LAW, OR UNDER
       THE TERMS OF THIS AGREEMENT, FOR ANY CONSEQUENTIAL, INDIRECT OR
       INCIDENTAL LOSS OR DAMAGE (WHETHER FOR LOSS OF PROFIT OR OTHERWISE) AND
       WHETHER OCCASIONED BY THE NEGLIGENCE OF THE RESPECTIVE PARTIES, THEIR
       EMPLOYEES OR AGENTS OR OTHERWISE.


13.    INSURANCE

13.1.  Elan shall maintain comprehensive general liability insurance,
       including product liability insurance on the Products manufactured
       and/or sold by Elan in such prudent amount as shall be determined by the
       Management Committee.  Elan shall provide the Company with a certificate
       from the insurance company verifying the above and undertakes to notify
       the Company directly at least thirty (30) days prior to the expiration
       or termination of such coverage.  Elan shall also provide the Company
       with a vendor's certificate substantially in a form to be agreed between
       the Parties.

13.2.  The Company shall maintain comprehensive general liability insurance,
       including product liability insurance on Products manufactured and/or
       sold by the Company that incorporate intellectual property licensed
       hereunder by Elan in such prudent amount as shall be determined by the
       Management Committee.  The Company shall provide Elan with a certificate
       from the insurance company verifying the above and undertakes to notify
       Elan thirty (30) days prior to the expiration or termination of such
       coverage.


14.    IMPOSSIBILITY OF PERFORMANCE - FORCE MAJEURE

14.1.  Neither Party to this Agreement shall be liable for delay in the
       performance of any of its obligations hereunder if such delay results
       from causes beyond its reasonable control, including, without
       limitation, acts of God, fires, strikes, acts of war, or intervention of
       a government authority, non availability of raw materials, but any such
       delay or failure shall be remedied by such Party as soon as practicable.


15     SETTLEMENT OF DISPUTES; PROPER LAW







                                     30


<PAGE>   31

15.1. The Parties will attempt in good faith to resolve any dispute arising
      out of or relating to this Agreement promptly by negotiation between
      executives of the Parties, failing which the Parties shall invoke the
      dispute resolution provisions set forth in Clause 16 of the Development
      Agreement.

15.2. This Agreement shall be governed by and construed in accordance with
      the laws of New York and subject to the provisions of Clause 15.1, the
      Parties agree to submit to the jurisdiction of the courts of New York for
      the resolution of disputes hereunder, which the Parties have not
      otherwise agreed should be subject to the binding determination of an
      Expert or Panel, pursuant to the terms of this Agreement.


16.   ASSIGNMENT

16.1. [****].


17.   NOTICES

17.1. Any notice to be given under this Agreement shall be sent in writing in
      English by registered mail, airmail, reputable courier or recorded
      delivery post, or telecopied (with a confirmation copy promptly sent by
      mail) to:

      -    if to Elan:      Elan Corporation, plc
                            Lincoln House             
                            Lincoln Place             
                            Dublin 2, Ireland         
                            Telecopier: 353 1 662 4960
                            Attention:     Vice President & General Counsel
                                           Elan Pharmaceutical Technologies

           with a copy to:  Brock Fensterstock Silverstein & McAuliffe LLC
                            153 East 53rd Street       
                            56th Floor                 
                            New York, New York  10022  
                            Telecopier: 1 212 371 5500 
                            Attention: David Robbins   

**** REPRESENTS MATERIAL REACTED PURSUANT TO A REQUEST
FOR CONFIDENTIAL TREATMENT PURSUANT TO RULE 24b-2 UNDER
THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED.





                                     31


<PAGE>   32


      -    if to the Company:  Endorex Vaccine Delivery Technologies, Inc.
                               900 North Shore Drive
                               Lake Buff, Illinois  60044
                               Telecopier: 1 847 604 8570
                               Attention:     President

           with a copy to:     Brobeck Phleger & Harrison LLP
                               1633 Broadway
                               New York, New York  10019
                               Telecopier: 1 212 586 7878
                               Attention: Richard Plumridge

      or to such other address(es) as may from time to time be notified by any
      Party to the others hereunder.

17.2. Any notice sent by mail shall be deemed to have been delivered within
      seven (7) working days after dispatch, any notice sent by reputable
      courier shall be deemed to have been delivered within two (2) working
      days after dispatch and any notice sent by telecopy shall be deemed to
      have been delivered within twenty four (24) hours of the time of the
      dispatch. Notices of change of address shall be effective upon receipt.


18.   MISCELLANEOUS CLAUSES

18.1. No waiver of any right under this Agreement shall be deemed effective
      unless contained in a written document signed by the Party charged with
      such waiver, and no waiver of any breach or failure to perform shall be
      deemed to be a waiver of any other breach or failure to perform or of any
      other right arising under this Agreement.

18.2. If any provision in this Agreement is agreed by the Parties to be, or
      is deemed to be, or becomes invalid, illegal, void or unenforceable under
      any law that is applicable hereto, (i) such provision will be deemed
      amended to conform to applicable laws so as to be valid and enforceable
      or, if it cannot be so amended without materially altering the intention
      of the Parties, it will be deleted, with effect from the date of such
      agreement or such earlier date as the Parties may agree, and (ii) the
      validity, legality and enforceability of the remaining provisions of this
      Agreement shall not be impaired or affected in any way.

18.3. The Parties shall use their respective reasonable endeavours to ensure
      that the Parties and any necessary Independent Third Party shall do,
      execute and perform all such further deeds, documents, assurances, acts
      and things as any of the Parties hereto may 




                                     32

<PAGE>   33


       reasonably require by notice in writing to the other Party or such
       Independent Third Party to carry the provisions of this Agreement.

18.4.  This Agreement shall be binding upon and enure to the benefit of the
       Parties hereto, their successors and permitted assigns and sub-licensees.

18.5.  No provision of this Agreement shall be construed so as to negate,
       modify or affect in any way the provisions of any other agreement
       between the Parties unless specifically referred to, and solely to the
       extent provided, in any such other agreement.  In the event of a
       conflict between the provisions of this Agreement and the provisions of
       the Development Agreement, the terms of the Development Agreement shall
       prevail unless this Agreement specifically provides otherwise.
       
18.6.  No amendment, modification or addition hereto shall be effective or
       binding on either Party unless set forth in writing and executed by a
       duly authorised representative of each Party.

18.7.  This Agreement may be executed in any number of counterparts, each of
       which when so executed shall be deemed to be an original and all of
       which when taken together shall constitute this Agreement.

18.8.  Each of the Parties undertake to do all things reasonably within its
       power which are necessary or desirable to give effect to the spirit and
       intent of this Agreement.

18.9.  Each of the Parties hereby acknowledges that in entering into this
       Agreement it has not relied on any representation or warranty save as
       expressly set out herein or in any document referred to herein.

18.10. Nothing contained in this Agreement is intended or is to be construed
       to constitute Elan and the Company as partners, or Elan as an employee
       of the Company, or the Company as an employee of Elan.  Neither Party
       hereto shall have any express or implied right or authority to assume or
       create any obligations on behalf of or in the name of the other Party or
       to bind the other Party to any contract, agreement or undertaking with
       any Independent Third Party.








                                     33


<PAGE>   34



IN WITNESS THEREOF the Parties hereto have executed this License Agreement in
duplicate.


/s/ Thomas G. Lynch

SIGNED BY Thomas G. Lynch
For  and on behalf of
ELAN CORPORATION, PLC









/s/ Michael S. Rosen

SIGNED BY Michael S. Rosen
For and on behalf of
ENDOREX VACCINE DELIVERY TECHNOLOGIES, INC.










                                     34


<PAGE>   35


                                   SCHEDULE 1


                          1. EXISTING ELAN TECHNOLOGY


[****]


                          2. EXCLUDED ELAN TECHNOLOGY

[****]















<PAGE>   36


                                   SCHEDULE 2

[****]

(as may be amended with mutual agreement of all the Parties in writing from
time to time)

**** REPRESENTS MATERIAL REACTED PURSUANT TO A REQUEST
FOR CONFIDENTIAL TREATMENT PURSUANT TO RULE 24b-2 UNDER
THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED.





















<PAGE>   37


                                   SCHEDULE 3

                  MAJOR COUNTRIES OUTSIDE OF THE UNITED STATES


[****]


**** REPRESENTS MATERIAL REACTED PURSUANT TO A REQUEST
FOR CONFIDENTIAL TREATMENT PURSUANT TO RULE 24b-2 UNDER
THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED.















<PAGE>   38


                                   SCHEDULE 4

                                     [****]


**** REPRESENTS MATERIAL REACTED PURSUANT TO A REQUEST
FOR CONFIDENTIAL TREATMENT PURSUANT TO RULE 24b-2 UNDER
THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED.

























<PAGE>   1
                                                                       Ex. 21

                           SUBSIDIARIES OF THE COMPANY

1)   Orasomal Technologies, Inc.

     Incorporated in the State of Delaware
     Does business as Orasomal Technologies, Inc.


2)   Wisconsin Genetics, Inc.

     Incorporated in the State of Delaware
     Does business as Wisconsin Genetics, Inc.









<PAGE>   1

                                                                   EXHIBIT 23.1


                      CONSENT OF INDEPENDENT ACCOUNTANTS



We consent to the incorporation by reference in the registration statement of
Endorex Corp. on Form S-2 (File No. 333-44583) of our report dated March 6,
1998, on our audits of the consolidated financial statements and financial
statement schedules of Endorex Corp. as of December 31, 1997 and for the year
then ended and for the period cumulative from inception (February 15, 1985) to
December 31, 1997, which reports are included on this Annual Report on Form
10-KSB.




                                                 COOPERS & LYBRAND L.L.P.



Chicago, Illinois
March 25, 1998


<TABLE> <S> <C>

<ARTICLE> 5
       
<S>                             <C>
<PERIOD-TYPE>                   YEAR
<FISCAL-YEAR-END>                          DEC-31-1997
<PERIOD-START>                             JAN-01-1997
<PERIOD-END>                               DEC-31-1997
<CASH>                                      15,706,374
<SECURITIES>                                         0
<RECEIVABLES>                                        0
<ALLOWANCES>                                         0
<INVENTORY>                                          0
<CURRENT-ASSETS>                            17,422,163
<PP&E>                                          88,914
<DEPRECIATION>                                 932,270
<TOTAL-ASSETS>                              19,050,167
<CURRENT-LIABILITIES>                          629,483
<BONDS>                                              0
                                0
                                          0
<COMMON>                                         9,856
<OTHER-SE>                                  18,410,828
<TOTAL-LIABILITY-AND-EQUITY>                19,050,167
<SALES>                                              0
<TOTAL-REVENUES>                               185,642
<CGS>                                                0
<TOTAL-COSTS>                                        0
<OTHER-EXPENSES>                             3,276,894
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                             153,074
<INCOME-PRETAX>                              3,244,326
<INCOME-TAX>                                         0
<INCOME-CONTINUING>                          3,244,326
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                 3,244,326
<EPS-PRIMARY>                                   (1.03)
<EPS-DILUTED>                                   (1.03)
        

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