GLIATECH INC
S-3/A, 1998-06-18
BIOLOGICAL PRODUCTS, (NO DIAGNOSTIC SUBSTANCES)
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<PAGE>   1
\ 
   
     AS FILED WITH THE SECURITIES AND EXCHANGE COMMISSION ON JUNE 18, 1998
    
 
                                            REGISTRATION STATEMENT NO. 333-52825
================================================================================
 
                                 UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549
 
   
                                AMENDMENT NO. 2
    
                                       TO
 
                                    FORM S-3
                             REGISTRATION STATEMENT
                                     UNDER
                           THE SECURITIES ACT OF 1933
 
                                 GLIATECH INC.
             (EXACT NAME OF REGISTRANT AS SPECIFIED IN ITS CHARTER)
 
<TABLE>
<S>                                                      <C>
                       DELAWARE                                                34-1587242
              ---------------------------                                  -------------------
            (STATE OR OTHER JURISDICTION OF                                 (I.R.S. EMPLOYER
            INCORPORATION OR ORGANIZATION)                               IDENTIFICATION NUMBER)
</TABLE>
 
                            23420 COMMERCE PARK ROAD
                             CLEVELAND, OHIO 44122
                                 (216) 831-3200
         (ADDRESS, INCLUDING ZIP CODE, AND TELEPHONE NUMBER, INCLUDING
            AREA CODE, OF REGISTRANT'S PRINCIPAL EXECUTIVE OFFICES)
 
                          THOMAS O. OESTERLING, PH.D.
                     PRESIDENT AND CHIEF EXECUTIVE OFFICER
                                 GLIATECH INC.
                            23420 COMMERCE PARK ROAD
                             CLEVELAND, OHIO 44122
                                 (216) 831-3200
           (NAME, ADDRESS, INCLUDING ZIP CODE, AND TELEPHONE NUMBER,
                   INCLUDING AREA CODE, OF AGENT FOR SERVICE)
 
                                   COPIES TO:
 
<TABLE>
<S>                                                      <C>
                THOMAS C. DANIELS, ESQ.                                 ALEXANDER D. LYNCH, ESQ.
              JONES, DAY, REAVIS & POGUE                                  BABAK YAGHMAIE, ESQ.
                  901 LAKESIDE AVENUE                                BROBECK, PHLEGER & HARRISON LLP
                 CLEVELAND, OHIO 44114                                  1633 BROADWAY, 47TH FLOOR
                    (216) 586-3939                                      NEW YORK, NEW YORK 10019
                                                                             (212) 581-1600
</TABLE>
 
        APPROXIMATE DATE OF COMMENCEMENT OF PROPOSED SALE TO THE PUBLIC:
 As soon as practicable after this Registration Statement has become effective.
 
    If the only securities being registered on this Form are being offered
pursuant to dividend or interest reinvestment plans, please check the following
box.  [ ]
 
    If any of the securities being registered on this Form are being offered on
a delayed or continuous basis pursuant to Rule 415 under the Securities Act of
1933 (the "Securities Act"), other than securities offered only in connection
with dividend or interest reinvestment plans, please check the following 
box.  [ ]
 
    If this Form is filed to register additional securities for an offering
pursuant to Rule 462(b) under the Securities Act, please check the following box
and list the Securities Act registration statement number of the earlier
effective registration statement for the same offering.  [ ]
 
    If this Form is a post-effective amendment filed pursuant to Rule 462(c)
under the Securities Act, check the following box and list the Securities Act
registration statement number of the earlier effective registration statement
for the same offering.  [ ]
 
    If delivery of the prospectus is expected to be made pursuant to Rule 434,
please check the following box.  [ ]
 
    THE REGISTRANT HEREBY AMENDS THIS REGISTRATION STATEMENT ON SUCH DATE OR
DATES AS MAY BE NECESSARY TO DELAY ITS EFFECTIVE DATE UNTIL THE REGISTRANT SHALL
FILE A FURTHER AMENDMENT WHICH SPECIFICALLY STATES THAT THIS REGISTRATION
STATEMENT SHALL THEREAFTER BECOME EFFECTIVE IN ACCORDANCE WITH SECTION 8(a) OF
THE SECURITIES ACT OR UNTIL THIS REGISTRATION STATEMENT SHALL BECOME EFFECTIVE
ON SUCH DATE AS THE SECURITIES AND EXCHANGE COMMISSION, ACTING PURSUANT TO SAID
SECTION 8(a), MAY DETERMINE.
================================================================================
<PAGE>   2
 
INFORMATION CONTAINED HEREIN IS SUBJECT TO COMPLETION OR AMENDMENT. A
REGISTRATION STATEMENT RELATING TO THESE SECURITIES HAS BEEN FILED WITH THE
SECURITIES AND EXCHANGE COMMISSION. THESE SECURITIES MAY NOT BE SOLD NOR MAY
OFFERS TO BUY BE ACCEPTED PRIOR TO THE TIME THE REGISTRATION STATEMENT BECOMES
EFFECTIVE. THIS PROSPECTUS SHALL NOT CONSTITUTE AN OFFER TO SELL OR THE
SOLICITATION OF AN OFFER TO BUY NOR SHALL THERE BE ANY SALE OF THESE SECURITIES
IN ANY STATE IN WHICH SUCH OFFER, SOLICITATION OR SALE WOULD BE UNLAWFUL PRIOR
TO REGISTRATION OR QUALIFICATION UNDER THE SECURITIES LAWS OF ANY SUCH STATE.
 
PROSPECTUS (Subject to Completion)
 
   
Dated June 18, 1998
    
 
                                2,000,000 SHARES
 
                                 GLIATECH LOGO
                                  COMMON STOCK
                          ---------------------------
   
     All of the 2,000,000 shares of Common Stock, $0.01 par value per share (the
"Common Stock"), offered hereby are being issued and sold by Gliatech Inc.
("Gliatech" or the "Company"). The Common Stock is quoted on the Nasdaq National
Market under the symbol "GLIA." On June 17, 1998, the last reported sale price
of the Common Stock on the Nasdaq National Market was $14.00.
    
                          ---------------------------
                 THIS OFFERING INVOLVES A HIGH DEGREE OF RISK.
           SEE "RISK FACTORS" BEGINNING ON PAGE 6 OF THIS PROSPECTUS.
                          ---------------------------
  THESE SECURITIES HAVE NOT BEEN APPROVED OR DISAPPROVED BY THE SECURITIES AND
 EXCHANGE COMMISSION OR ANY STATE SECURITIES COMMISSION NOR HAS THE SECURITIES
   AND EXCHANGE COMMISSION OR ANY STATE SECURITIES COMMISSION PASSED UPON THE
                  ACCURACY OR ADEQUACY OF THIS PROSPECTUS. ANY
              REPRESENTATION TO THE CONTRARY IS A CRIMINAL OFFENSE.
 
   
<TABLE>
<CAPTION>
=============================================================================================================
                                                                  UNDERWRITING
                                           PRICE TO              DISCOUNTS AND             PROCEEDS TO
                                            PUBLIC               COMMISSIONS(1)             COMPANY(2)
<S>                                <C>                      <C>                      <C>
- -------------------------------------------------------------------------------------------------------------
Per Share.........................          $                       $                        $
Total (3).........................          $                       $                        $
=============================================================================================================
</TABLE>
    
 
(1) The Company has agreed to indemnify the Underwriters against certain
    liabilities, including liabilities under the Securities Act of 1933. See
    "Underwriting."
 
(2) Before deducting expenses payable by the Company, estimated to be $410,000.
 
(3) The Company has granted the Underwriters an option, exercisable within 30
    days from the date hereof, to purchase an aggregate of up to 300,000
    additional shares at the Price to Public less Underwriting Discounts and
    Commissions to cover over-allotments, if any. If all such additional shares
    are purchased, the total Price to Public, Underwriting Discounts and
    Commissions and Proceeds to Company will be $          , $          , and
    $          , respectively. See "Underwriting."
                          ---------------------------
     The Common Stock is offered by the several Underwriters named herein when,
as and if received and accepted by them, and subject to their right to reject
orders in whole or in part and subject to certain other conditions. It is
expected that the delivery of certificates for the shares will be made at the
offices of Cowen & Company, New York, New York on or about                ,
1998.
                          ---------------------------
 
COWEN & COMPANY
 
                           FURMAN SELZ
 
                               VECTOR SECURITIES INTERNATIONAL, INC.
 
               , 1998
<PAGE>   3
[PHOTO] 
   
ADCON-L is a proprietary, resorbable, carbohydrate polymer gel designed to
inhibit scarring and adhesions following lumbar surgeries. The Company obtained
regulatory clearance in 1995 to affix CE Marking for ADCON-L and currently
markets the product in 29 countries outside the U.S. On May 27, 1998, the
Company received approval from the FDA to market ADCON-L in the U.S.
    
[PHOTO]  
                              LUMBAR DISC SURGERY
                             WITHOUT USE OF ADCON-L
 
After surgery, scarring and adhesions may bind and tether the spinal nerve root
to surrounding tissues, possibly causing pain and loss of function.

                              LUMBAR DISC SURGERY
                              WITH USE OF ADCON-L
[PHOTO]  
   
ADCON-L is applied around the nerve root and provides a resorbable barrier to
inhibit unwanted scarring and adhesions at the surgical site.
    
 
                            ------------------------
 
     ADCON(R) is a registered trademark of the Company. Trade names and
trademarks of other companies appearing elsewhere in this Prospectus are the
property of their respective holders.
                            ------------------------
 
     CERTAIN PERSONS PARTICIPATING IN THIS OFFERING MAY ENGAGE IN TRANSACTIONS
THAT STABILIZE, MAINTAIN OR OTHERWISE AFFECT THE PRICE OF THE COMMON STOCK,
INCLUDING OVER-ALLOTMENT, STABILIZING TRANSACTIONS, SYNDICATE SHORT COVERING
TRANSACTIONS AND PENALTY BIDS. FOR A DESCRIPTION OF THESE ACTIVITIES, SEE
"UNDERWRITING."
 
     IN CONNECTION WITH THIS OFFERING, CERTAIN UNDERWRITERS AND SELLING GROUP
MEMBERS MAY ENGAGE IN PASSIVE MARKET MAKING TRANSACTIONS IN THE COMMON STOCK ON
THE NASDAQ NATIONAL MARKET IN ACCORDANCE WITH RULE 103 OF REGULATION M. SEE
"UNDERWRITING."
<PAGE>   4
 
                               PROSPECTUS SUMMARY
 
     The following summary is qualified in its entirety by, and should be read
in conjunction with, the more detailed information appearing elsewhere in this
Prospectus and in the documents incorporated into this Prospectus by reference.
Unless otherwise indicated or the context otherwise requires, all information in
this Prospectus assumes no exercise of the Underwriters' over-allotment option.
The shares of Common Stock offered hereby involve a high degree of risk. This
Prospectus contains forward-looking statements which involve risks and
uncertainties. The Company's actual results may differ significantly from the
results discussed in the forward-looking statements. Factors that might cause
such a difference include, but are not limited to, those discussed under "Risk
Factors," "Management's Discussion and Analysis of Financial Condition and
Results of Operations" and elsewhere in this Prospectus. Investors should
consider carefully the information set forth under the heading "Risk Factors."
As used in this Prospectus, unless otherwise indicated or the context otherwise
requires, all references to "Gliatech" or the "Company" include Gliatech Inc.
and its wholly owned subsidiaries.
 
                                  THE COMPANY
 
   
     Gliatech is a leader in the research, development and commercialization of
proprietary, resorbable, carbohydrate polymer medical devices designed to
inhibit surgical scarring and adhesions. The Company has developed its family of
ADCON medical devices to be used prophylactically as a barrier between tissues
to inhibit scarring and adhesions in all patients undergoing certain surgical
procedures. The Company's most developmentally advanced product, ADCON-L, a
proprietary, resorbable, carbohydrate polymer gel, is designed to inhibit
surgical scarring and adhesions and to reduce postsurgical pain following lumbar
surgeries. On May 27, 1998, the Company received a letter from the Food and Drug
Administration ("FDA") approving the premarket approval application ("PMA") for
ADCON-L, which permits the Company to market ADCON-L in the U.S. As a result,
the Company has recently commenced marketing ADCON-L in the U.S. ADCON-L is also
being marketed in 29 countries outside the U.S., including the 19 countries
which recognize CE Marking. In addition to the ADCON family of medical devices,
the Company is pursuing the development of small molecule drug candidates for
the treatment of several central nervous system disorders, including Attention
Deficit Hyperactive Disorder ("ADHD"), sleep disorders, obesity, anxiety and
Alzheimer's Disease ("AD"). The Company is pursuing its AD program through its
strategic alliance with Janssen Pharmaceutica, N.V. of Belgium ("Janssen"), a
wholly-owned subsidiary of Johnson & Johnson. See "Risk Factors -- Early
Commercialization; Uncertainty of Market Acceptance of ADCON Family of
Products," "-- Reliance on Third Party for Manufacturing; Comprehensive
Regulation of Manufacturing of Products" and "Business -- Government
Regulation."
    
 
     Surgical scarring is a significant medical problem often resulting in
adhesions at the surgical site, thereby binding together tissues, nerves and
organs following either open incision or minimally invasive surgery. Scarring
and adhesions may lead to many significant postsurgical complications, including
recurrent pain and impairment of function following lumbar surgery, infertility
following pelvic surgery and limited range of motion following tendon and
peripheral nerve surgery of the hand. Excessive scarring also can obstruct
access to the surgical site when reoperation is necessary making additional
surgery difficult. Due to the differences in the surgical environments in which
each of these products would be used, each ADCON product is designed to be
adapted for use at different surgical sites. ADCON-L is designed to inhibit
scarring and adhesions and reduce postsurgical pain following lumbar surgery. In
1995, approximately 450,000 lumbar surgeries were performed in the U.S. The
Company's European clinical trial has shown that approximately 90% of lumbar
surgery patients experience a certain amount of scarring following such surgery.
This clinical trial also demonstrated that 8% to 44% of patients who received
ADCON-L experienced a lower incidence of activity-related pain in the
performance of all evaluated activities of daily living.
 
     The Company is also developing ADCON-P, a proprietary, resorbable,
carbohydrate polymer solution, which is designed to inhibit pelvic and
gynecological postsurgical scarring and adhesions, which may lead to infertility
or difficulty in conceiving. In 1994, approximately 1.3 million gynecological
surgeries were performed in the U.S. Independent studies have shown that more
than 55% of patients undergoing such surgeries experience some postsurgical
scarring and adhesions. The Company has initiated a double-blind, controlled
clinical trial and has completed enrollment of 41 patients; 23 patients for
evaluation in reoperations to remove adhesions and 18
 
                                        3
<PAGE>   5
 
patients for evaluation in uterine tumor surgeries. Upon completion of the pilot
trial, which is currently anticipated to occur in the second half of 1998, the
Company intends to submit a request to the FDA to conduct a pivotal clinical
trial for ADCON-P. See "Risk Factors -- Early Commercialization; Uncertainty of
Market Acceptance of ADCON Family of Products," "-- Uncertainty Related to
Development of ADCON Products" and "-- Government Regulation."
 
     In addition, the Company is developing ADCON-T/N, a proprietary,
resorbable, carbohydrate polymer gel, which is designed to inhibit tendon and
peripheral nerve postsurgical scarring and adhesions, which may cause recurrent
pain and limited range of motion. In 1994, approximately 260,000 tendon and
peripheral nerve surgeries were performed in the U.S. The Company has initiated
a pivotal clinical trial for ADCON-T/N in the U.S. The pivotal trial is designed
to demonstrate that ADCON-T/N inhibits postsurgical scarring and adhesions
following carpal tunnel release, the surgical procedure to treat carpal tunnel
syndrome after the first surgery has failed.
 
   
     The Company is currently marketing ADCON-L and ADCON-T/N outside the U.S.
through independent medical device distributors in 29 countries, including the
major countries in the European Union. As a result of receiving approval from
the FDA, the Company has recently commenced marketing ADCON-L in the U.S.
through a network of independent manufacturers' agents with an aggregate sales
force of approximately 175 sales representatives who serve the orthopaedic and
neurosurgical markets. In addition, the Company signed a development and
exclusive license agreement in December 1996 with Chugai Pharmaceutical Co. Ltd.
("Chugai") for the sale of ADCON-L and ADCON-T/N in Japan. Chugai has filed
applications requesting regulatory approval to market ADCON-L and ADCON-T/N in
Japan. The Company is also in the early stages of development of several other
ADCON products, including: ADCON-A, for use in abdominal surgeries; ADCON-I for
use in implant/prosthetic surgeries; and ADCON-C for use in cardiac surgeries.
In 1994, approximately 2.5 million abdominal surgeries, approximately 1.4
million implant/prosthetic surgeries and approximately 1.0 million cardiac
surgeries were performed in the U.S.
    
 
     In addition to developing its ADCON family of products, the Company is
engaged in the discovery and development of therapeutic products for its
Cognition Modulation program and AD program. The Company is pursuing these
therapeutic programs by engaging in the research and development of small
molecule drug candidates for the treatment of several central nervous system
disorders. The Company's Cognition Modulation program is focused on a class of
compounds designed to act on the histamine H(3) receptor in the brain which
regulates sleep/wakeful states and modulates the level of arousal and alertness.
An antagonist to this receptor could lead to enhanced states of alertness and
may be used to treat obesity, narcolepsy, ADHD and the cognitive deficit in AD
patients. An agonist to the histamine H(3) receptor could reduce levels of
wakefulness and arousal, making such an agonist a candidate for use in the
treatment of anxiety and insomnia. The Company anticipates that it will identify
a lead compound as an antagonist to the histamine H(3) receptor in the second
half of 1998 and expects that it will begin human clinical trials with respect
to such compound in late 1998. See "Risk Factors -- Early Stage of Development
for Therapeutic Programs" and "-- Government Regulation."
 
     The Company is also engaged in the research and development of therapeutic
products for the treatment of AD. In October 1994, the Company entered into an
agreement with Janssen (the "Janssen Agreement") to collaborate on the research
and development of therapeutic products to treat AD. Pursuant to the Janssen
Agreement, the Company has developed a number of high throughput in vitro assay
systems that have been used to screen Janssen's pharmaceutical library and has
identified several lead compounds. The Company anticipates that lead compounds
will be selected for preclinical testing in late 1998. See "Risk
Factors -- Early Stage of Development for Therapeutic Programs" and
"-- Government Regulation."
 
     The Company was incorporated under the laws of the State of Delaware on
August 12, 1987 and commenced operations in 1988. The Company's executive
offices are located at 23420 Commerce Park Road, Cleveland, Ohio 44122,
telephone number (216) 831-3200.
 
                                        4
<PAGE>   6
 
                                  THE OFFERING
 
   
<TABLE>
<S>                                            <C>
Common Stock offered hereby..................  2,000,000 shares
Common Stock to be outstanding after the
  offering...................................  9,624,848 shares(1)
Use of proceeds..............................  For the funding of the U.S. development of
                                               ADCON-P and ADCON-T/N, for the costs
                                               associated with the market introduction in
                                               the U.S. of ADCON-L, for the continued
                                               research and development of the Company's
                                               drug programs and additional ADCON products,
                                               and for working capital and other general
                                               corporate purposes.
Nasdaq National Market symbol................  GLIA
</TABLE>
    
 
                      SUMMARY CONSOLIDATED FINANCIAL DATA
                     (IN THOUSANDS, EXCEPT PER SHARE DATA)
 
<TABLE>
<CAPTION>
                                                                                                 THREE MONTHS ENDED
                                                               YEAR ENDED DECEMBER 31,                MARCH 31,
                                                          ---------------------------------   -------------------------
                                                            1995        1996        1997         1997          1998
                                                          ---------   ---------   ---------   -----------   -----------
                                                                                                     (UNAUDITED)
<S>                                                       <C>         <C>         <C>         <C>           <C>
STATEMENT OF OPERATIONS DATA:
  Revenues
    Research contracts and licensing fees...............  $   2,217   $   2,855   $   2,954    $     739     $     739
    Product sales.......................................        182         901       1,536          345           512
    Government grants...................................        255         122         410           50           150
                                                          ---------   ---------   ---------    ---------     ---------
      Total revenues....................................      2,654       3,878       4,900        1,134         1,401
  Operating costs and expenses
    Research and development............................      5,107       6,120       6,952        1,855         2,253
    Selling, general and administrative.................      2,599       4,070       4,401        1,070         1,233
    Depreciation and amortization.......................        170         166         293           65            87
    Cost of products sold...............................        123         342         614          125           167
                                                          ---------   ---------   ---------    ---------     ---------
      Total operating costs and expenses................      7,999      10,698      12,260        3,115         3,740
                                                          ---------   ---------   ---------    ---------     ---------
  Loss from operations..................................     (5,345)     (6,820)     (7,360)      (1,981)       (2,339)
  Settlement of claim...................................                             (2,025)
  Interest income, net..................................        360       1,120         824          237           147
                                                          ---------   ---------   ---------    ---------     ---------
  Net loss..............................................  $  (4,985)  $  (5,700)  $  (8,561)   $  (1,744)    $  (2,192)
                                                          =========   =========   =========    =========     =========
  Basic and diluted net loss per common share(2)........  $   (3.28)  $   (0.78)  $   (1.16)   $   (0.24)    $   (0.29)
                                                          =========   =========   =========    =========     =========
  Shares used for purposes of computing net loss per
    common share........................................      1,519       7,313       7,354        7,333         7,451
</TABLE>
 
   
<TABLE>
<CAPTION>
                                                                       AT MARCH 31, 1998
                                                               ---------------------------------
                                                                 ACTUAL           AS ADJUSTED(3)
                                                               -----------        --------------
                                                                          (UNAUDITED)
<S>                                                            <C>                <C>
BALANCE SHEET DATA:
  Cash, cash equivalents and short-term investments.........    $  8,042            $  33,882
  Working capital...........................................       7,136               32,976
  Total assets..............................................      11,659               37,499
  Deficit accumulated during the development stage..........     (44,206)             (44,206)
  Total stockholders' equity................................       9,247               35,087
</TABLE>
    
 
- ------------------
 
   
(1) Excludes an aggregate of 1,107,175 shares of Common Stock issuable upon
    exercise of stock options outstanding at March 31, 1998 at a weighted
    average exercise price of $7.54 per share granted under the Company's stock
    option plans. An additional 20,000 shares of Common Stock have been reserved
    for issuance upon the exercise of warrants at an exercise price of $7.50 per
    warrant, subject to certain adjustments.
    
(2) See Note A to Consolidated Financial Statements of the Company for
    information concerning the computation of basic and diluted net loss per
    common share.
   
(3) Adjusted to reflect the sale by the Company of the 2,000,000 shares of
    Common Stock offered hereby at an assumed public offering price of $14.00
    per share (the last reported sale price on June 17, 1998) and the receipt of
    the net proceeds therefrom. See "Use of Proceeds" and "Capitalization."
    
 
                                        5
<PAGE>   7
 
                                  RISK FACTORS
 
     Prospective investors in the shares of Common Stock offered hereby should
consider carefully the following risk factors, in addition to the other
information contained in this Prospectus. This Prospectus contains forward-
looking statements which involve risks and uncertainties. The Company's actual
results may differ significantly from the results discussed in the
forward-looking statements. Factors that might cause such a difference include,
but are not limited to, those discussed below and in "Management's Discussion
and Analysis of Financial Condition and Results of Operations," as well as those
discussed elsewhere in this Prospectus.
 
   
EARLY COMMERCIALIZATION; UNCERTAINTY OF MARKET ACCEPTANCE OF ADCON FAMILY OF
PRODUCTS
    
 
   
     Since commencement of operations in 1988, the Company has been engaged in
the research, development and commercialization of medical devices designed to
inhibit postsurgical scarring and adhesions and the research and development of
pharmaceutical products for use in the treatment of several central nervous
system disorders. Although the Company has entered into agreements with
distributors for the sale of ADCON-L and ADCON-T/N in selected European
countries and certain other countries outside the U.S., it has generated only
limited revenues from such products and no assurances can be given that
commercialization of these products will be successful. On May 27, 1998, the
Company received approval from the FDA to begin marketing ADCON-L in the U.S. As
a result, the Company has only recently commenced marketing ADCON-L in the U.S.
The Company's success will depend in part upon the acceptance of the Company's
products, in particular, its ADCON family of products, by the medical community,
including health care providers, such as hospitals and physicians, and
third-party payors. Such acceptance may depend upon the extent to which the
medical community perceives the Company's products as a safe, reliable and
cost-effective alternative to certain existing products, a few of which are
already accepted by the medical community. See "Business -- Competition." In
addition, the Company is marketing its ADCON-L medical device outside the U.S.
in new packaging, which includes a redesigned applicator, that will require
separate U.S. regulatory approval. There can be no assurance that such U.S.
approval will be obtained. See "--Government Regulation." There can be no
assurance of market acceptance of the new packaging or redesigned applicator in
Europe, or, upon approval of such new packaging or redesigned applicator, in the
U.S. The market acceptance of the Company's ADCON products is also dependent on
the Company's ability to convince surgeons and other medical professionals that
the benefits associated with the Company's ADCON products justify the
modification of standard medical techniques in order to use the Company's ADCON
devices safely and effectively. There can be no assurance that the Company's
products will achieve significant market acceptance on a timely basis, if at
all. Failure of some or all of the Company's products to achieve significant
market acceptance could have a material adverse effect on the Company's
business, prospects, financial condition and results of operations.
    
 
UNCERTAINTY RELATED TO DEVELOPMENT OF ADCON PRODUCTS
 
     The Company has products other than ADCON-L under development. ADCON-P and
ADCON-T/N are in clinical trials in the U.S. No assurances can be given as to
when such clinical trials will be completed, or that, if completed, ADCON-P or
ADCON-T/N will prove to be safe and effective in such U.S. clinical trials or
that required U.S. regulatory approvals or non-U.S. regulatory approvals will be
obtained for such products. Even if the Company is able to receive such required
regulatory approvals, there can be no assurance as to the extent, if any, that
any such product will receive market acceptance. In addition, the Company is
conducting preclinical studies with respect to ADCON-A, ADCON-I and ADCON-C.
These ADCON products are in a very early stage of development and will require
substantial additional research and development, including preclinical studies
and extensive clinical trials, before applying for regulatory approval with
applicable authorities. There can be no assurance that the Company will be
successful in developing these other ADCON products or, if developed, will prove
to be safe and effective in clinical trials and receive necessary regulatory
approvals. The Company may also encounter problems relating to research,
development, manufacturing, distribution and marketing of these products. The
failure or inability to address such problems adequately would have a material
adverse effect on the Company's business, prospects, financial condition and
results of operations.
 
                                        6
<PAGE>   8
 
EARLY STAGE OF DEVELOPMENT FOR THERAPEUTIC PROGRAMS
 
     The Company is engaged in the discovery and development of therapeutic
products for use in the treatment of certain central nervous system disorders.
Although several of these therapeutic products are in preclinical evaluation,
the products currently under development will require substantial additional
research and development, including preclinical studies and extensive clinical
trials, before applying for regulatory approval with applicable authorities.
There can be no assurance that the Company's research and development activities
will lead to the discovery or development of any suitable drugs or drug
candidates. The Company has not conducted any clinical trials with respect to
any such drug candidates, and accordingly, there can be no assurance that any
such drug candidates will prove to be safe and effective. Moreover, the drugs
developed or being developed by the Company may prove to have undesirable and
unintended side effects or may require complex delivery systems that may prevent
or limit their commercial use. Even if the Company is able to develop
therapeutic products for use in the treatment of certain central nervous system
disorders and even if such therapeutic products receive required regulatory
approvals, there can be no assurance as to the extent, if any, that any such
product will receive market acceptance. See "-- Government Regulation" and
"Business -- Government Regulation."
 
HISTORY OF OPERATING LOSSES AND ACCUMULATED DEFICIT; UNCERTAINTY OF FUTURE
PROFITABILITY; FLUCTUATING RESULTS OF OPERATIONS
 
     The Company is a development stage company that has not generated any
material revenues from operations. As a result, the Company has had net
operating losses since its inception and expects such losses to continue unless
and until such time as revenues are sufficient to fund its operations. The
Company has accumulated a deficit of $44.2 million for the period from inception
of operations (August 31, 1988) through March 31, 1998. The Company expects to
continue to incur losses over at least the next several years and the amount of
future net losses and time required by the Company to reach profitability are
uncertain. The Company's ability to generate significant revenue and become
profitable is dependent in large part on its success in obtaining regulatory
approvals or clearances for its products, commercializing ADCON products that
have obtained required regulatory approvals, developing and marketing new
products, the success of its independent distributors in marketing its products,
entering into additional marketing agreements where appropriate, and the ability
of its strategic partners to commercialize successfully products incorporating
the Company's technologies. There can be no assurance that the Company will
generate significant revenue or become profitable on a sustained basis, if at
all. In addition, the Company's results of operations have fluctuated in the
past on an annual and quarterly basis and may fluctuate significantly from
period to period in the future, depending upon a number of factors, many of
which are outside of the Company's control. Such factors include the conduct and
timing of clinical trials, the timing of government approvals, market acceptance
of the Company's products, the success of competitive products, the ability of
the Company to enter into strategic alliances with corporate partners, the
expenses associated with patent matters, and the timing of expenses related to
product launches. Due to one or more of these factors, in one or more future
quarters, the Company's results of operations may fall below the expectations of
securities analysts and investors. In that event, the market price of the Common
Stock of the Company could be materially and adversely affected. See "Selected
Consolidated Financial Data" and "Management's Discussion and Analysis of
Financial Condition and Results of Operations."
 
FUTURE CAPITAL NEEDS; UNCERTAINTY OF ADDITIONAL FUNDING
 
     The Company's future capital requirements will depend on many factors,
including the commercial success of its ADCON family of products, the progress
of the Company's research and development, the scope and results of preclinical
studies and clinical trials, the cost of obtaining regulatory approvals, its
success in consummating the strategic alliances required to fund certain of its
programs, the rate of technological advances, determinations as to the
commercial potential of certain of the Company's product candidates, the status
of competitive products and the establishment of additional manufacturing
capacity. No assurance can be given that there will not be material adverse
changes in the Company's business or in the regulatory environment in which the
Company operates that will consume the Company's available capital resources. In
addition, the Company will need to raise or obtain substantial additional funds
to conduct research and preclinical and clinical trials, to apply for the
regulatory approvals necessary to bring additional products to market, and to
develop the necessary
 
                                        7
<PAGE>   9
 
marketing, distribution and support capabilities required to sell and distribute
the Company's products and proposed products. No assurance can be given that
additional financing will be available or, if available, that it will be
available on satisfactory terms. Any subsequent equity financing could result in
dilution to the Company's then existing stockholders. If adequate funds are not
available, the Company may be required to scale back or discontinue one or more
of its product development programs, or obtain funds through strategic alliances
that may require the Company to relinquish rights to certain of its
technologies, product candidates or products, if any. The Company expects that
its existing capital resources, together with the net proceeds of the offering
and the interest earned thereon, will enable the Company to maintain its current
and planned operations for at least the next two years. See "Management's
Discussion and Analysis of Financial Condition and Results of
Operations -- Liquidity and Capital Resources."
 
DEPENDENCE ON INDEPENDENT DISTRIBUTORS; NO DIRECT SALES FORCE
 
   
     The Company has entered into distribution agreements with third-party
distributors for its ADCON-L and ADCON-T/N products in 29 countries outside the
U.S. In addition, the Company has entered into a development and exclusive
license agreement with Chugai, which provides for the sale of ADCON-L and
ADCON-T/N in Japan upon receipt of regulatory approval to market such products.
As a result of receiving approval from the FDA, the Company has recently
commenced marketing ADCON-L in the U.S. through a network of independent
manufacturers' agents with an aggregate sales force of approximately 175 sales
representatives who serve the orthopaedic and neurosurgical market. The Company
has not, to date, engaged in direct marketing or sale of its products. In order
to market its product in additional countries and sell any additional products
that it may ultimately have available for commercial sale, the Company will need
to contract with additional distributors for sales and marketing functions.
These distributors are, and the manufacturers' agents will be, independent third
parties, who are not employees of the Company and are not directly under the
control or supervision of the Company. There can be no assurance that the
current relationships with distributors will continue on acceptable terms and
conditions to the Company, nor can there be any assurances that the Company's
arrangements with independent manufacturer's agents will prove to be
satisfactory to the Company or that additional distributorship arrangements with
third parties for such functions will be obtained on acceptable terms. Moreover,
there can be no assurance that the distributors or agents will devote sufficient
time and resources to the Company's products or other products to enable the
products to be successfully commercialized. Furthermore, there can be no
assurance that the Company will be successful in marketing its ADCON products
because the Company does not control the distribution of its products and relies
exclusively on third parties for the distribution of its products. Failure of
some or all of the Company's products to be successfully and efficiently
distributed could have a material adverse effect on the Company's business,
prospects, financial condition and results of operations. See "Business --
Marketing and Sales."
    
 
RELIANCE ON THIRD-PARTY FOR MANUFACTURING; COMPREHENSIVE REGULATION OF
MANUFACTURING OF PRODUCTS
 
     The Company does not have any manufacturing facilities and is currently
relying solely on a foreign contractor, European Medical Contract Manufacturing
("EMCM"), a third-party manufacturer located in Nijmegen, The Netherlands, for
the supply of ADCON-L, ADCON-P and ADCON-T/N for its commercial or clinical
requirements, as the case may be. There can be no assurance that the Company's
current manufacturer will comply with all applicable regulatory standards, that
such manufacturer will have the capacity to provide the Company with a future
supply of products that is adequate to meet the Company's commercialization or
clinical requirements or that the Company would be able to identify an alternate
source of supply on terms acceptable to the Company.
 
     Manufacturers of medical devices and drugs also are required to adhere to
the FDA regulations setting forth Quality System Regulations requirements
("QSR") for medical devices and Good Manufacturing Practices requirements
("GMP") for drugs, and to similar requirements in other countries, which include
requirements relating to product testing and quality assurance as well as the
corresponding maintenance of records and documentation. Failure to comply with
applicable manufacturing regulations, other applicable regulatory standards, or,
where required by law, the standards of International Organization for
Standardization ("ISO"), could result in sanctions being imposed on the Company
or the manufacturer of its products, including warning
 
                                        8
<PAGE>   10
 
   
letters, fines, injunctions, civil penalties, failure of the FDA or other
regulatory authorities to grant premarket clearance or premarket approval of
medical devices and drugs, operating restrictions and criminal prosecution.
There can be no assurance that the current manufacturer of the Company's
products will comply with all applicable regulatory requirements or that the
Company would be able to identify new or additional manufacturers for its
products on terms acceptable to the Company. The failure of the Company's
current manufacturers to comply with applicable regulatory requirements or to
make acceptable arrangements for the manufacture of its products could have a
material adverse effect on the Company's business, prospects, financial
condition and results of operations. See "Business -- Manufacturing and
Suppliers" and "-- Government Regulation."
    
 
DEPENDENCE ON STRATEGIC ALLIANCES
 
     The Company's strategy for its AD and Cognition Modulation programs entails
entering into various arrangements with collaborative partners, licensors,
licensees and others for the development, marketing and distribution of
products, and is dependent upon the subsequent success of these outside parties
in performing their responsibilities. In October 1994, the Company entered into
a collaborative agreement with Janssen to research and develop treatments for AD
which extends through October 1998. Janssen has retained its right to extend the
Janssen Agreement for an additional period of one year. As of March 31, 1998,
the Company has received $9.7 million in revenues under the Janssen Agreement.
Although the current term of this arrangement does not expire until October 1998
with an optional renewal for one year, there can be no assurance that Janssen
will exercise its right to renew the collaboration agreement beyond the current
term. See "Business -- Neurologic Drug Development Programs" and "-- The Janssen
Agreement." In addition, although the Company is currently funding the
development of its ADCON family of products and its Cognition Modulation program
independently of strategic partners, the Company may enter into agreements with
strategic partners for certain of its ADCON products, other than ADCON-L, and
may enter into agreements with strategic partners prior to the completion of
clinical trials for therapeutic products relating to its Cognition Modulation
program. There can be no assurance that the Company will be able to enter into
an agreement with such a strategic partner for such ADCON products or its
Cognition Modulation program on acceptable terms, if at all. Furthermore, there
can be no assurance that development of such ADCON products, the AD program or
the Cognition Modulation program will be successfully completed or that the
Company will be able to successfully commercialize the products developed as
part of any collaborative efforts for such ADCON products, pursuant to the
Janssen Agreement, or as part of any future Cognition Modulation collaborative
arrangements. Failure to obtain or maintain strategic alliances, including its
alliance with Janssen, or the failure of any such strategic alliances to
successfully commercialize such products, could have a material adverse effect
on the Company's business, prospects, financial condition and results of
operations.
 
UNCERTAINTY OF HEALTH CARE REIMBURSEMENT
 
     The Company's ability to successfully commercialize its products will
depend in part on the extent to which reimbursement for the costs of such
products and related treatments will be available from government health
administration authorities, private health coverage insurers and other
organizations. In addition, in both the U.S. and elsewhere, sales of health care
products are dependent on the availability of reimbursement to the consumer from
third-party payers, such as government and private insurance plans. Significant
uncertainty exists as to the reimbursement status of newly approved health care
products, and third-party payers are increasingly challenging the prices charged
for medical products and services. There can be no assurance that ADCON-L and
the other ADCON products will be considered cost effective or that reimbursement
will be available or will be sufficient to allow the Company to sell its
products on a competitive basis. There can be no assurance that the Company's
business, prospects, financial condition and results of operations will not be
materially adversely affected by the continuing efforts of governmental and
third-party payors to contain or reduce the costs of health care. For example,
in certain international markets the pricing or profitability of health care
products is subject to government control. In the U.S., there have been, and the
Company expects that there will continue to be, a number of federal and state
proposals to implement similar government control. While the Company cannot
predict whether any legislative or regulatory proposals or reforms will be
adopted, such proposals or reforms could have a material adverse effect on the
Company's business, prospects, financial condition or results of operations.
Inadequate coverage or reimbursement by government and third-party payers for
uses of the
                                        9
<PAGE>   11
 
Company's products, particularly ADCON-L, could adversely effect the market
acceptance of these products which would have a material adverse effect on the
Company's business, prospects, financial condition and results of operations.
See "-- Early Commercialization; Uncertainty of Market Acceptance of ADCON
Family of Products," "-- Government Regulation" and "Business -- Government
Regulation."
 
RELIANCE ON SINGLE SOURCE SUPPLIER
 
     The Company currently obtains one of its key components for the production
of its ADCON products from one supplier. The Company currently has no
contractual supply agreement with such supplier. The Company also has developed
its own proprietary process to manufacture this key component and is currently
manufacturing it on a pilot basis through a contract manufacturer according to
QSR requirements. In addition, the Company is pursuing qualification of
additional suppliers. There can be no assurance that the current supply of raw
materials will continue to be provided on acceptable terms and conditions to the
Company, if at all, or that such alternative sources will be successfully
located or developed. The failure to obtain adequate supplies from the sole
source or to locate or develop alternative supplies could have a material
adverse effect on the Company's business, prospects, financial condition and
results of operations. See "Business -- Manufacturing and Suppliers."
 
GOVERNMENT REGULATION
 
     The manufacture and sale of the Company's products are subject to
regulation by numerous authorities, principally the FDA, and corresponding state
and foreign agencies. The regulatory process is lengthy, expensive and
uncertain. Prior to commercial sale in the U.S., most medical devices and new
drugs, including the Company's products under development, must be cleared or
approved by the FDA. Securing FDA clearances and approvals may require the
submission of extensive clinical data and supporting information to the FDA.
Product clearances and approvals can be withdrawn for failure to comply with
regulatory requirements or upon the occurrence of unforeseen problems following
initial marketing. Sales of the Company's products outside of the U.S. are
subject to foreign regulatory requirements that may vary widely from country to
country. Prior to commercial sale of medical devices in the countries of the
European Union, the Company is required to comply with the Essential
Requirements of the Medical Devices Directive, which primarily relate to safety
and performance, and to undergo conformity assessment certification by a
Notified Body in order to qualify for CE Marking. The regulation of drugs in the
European Union is subject to a separate and different regulatory framework which
requires, among other things, premarket approval by the applicable regulatory
agencies before sale of such products. The time required to obtain clearance
from a foreign country may be longer or shorter than that required by the FDA or
other such agencies, and clearance or approval or other regulatory requirements
may differ. There can be no assurance that the Company will be able to obtain
necessary regulatory clearances or approvals on a timely basis, if at all, for
any of its products under development, and delays in receipt or failure to
receive such clearances or approvals, the loss of previously received clearances
or approvals, or failure to comply with existing or future regulatory
requirements could have a material adverse effect on the Company's business,
prospects, financial condition and results of operations. Moreover, regulatory
clearances or approvals for products such as medical devices and new drugs, even
if granted, may include significant limitations on the uses for which such
products may be marketed. Additionally, product clearances or approvals can be
withdrawn for failure to comply with regulatory requirements. In addition,
certain material changes to medical devices and drugs also are subject to FDA
and other foreign governmental review and approval. For example, the Company is
marketing its ADCON-L medical device outside the U.S. in a redesigned applicator
that will require separate U.S. regulatory approval. There can be no assurance
that any clearances or approvals that are required, will be obtained or that
once obtained will not be withdrawn or that compliance with other regulatory
requirements can be maintained. In addition, because certain of the Company's
products are in research or development phases, the Company cannot accurately
predict all relevant regulatory requirements or related issues. Changes in
existing laws, regulations or policies and the adoption of new laws, regulations
or policies could prevent the Company from, or could affect the timing of,
achieving compliance with regulatory requirements, including current and future
regulatory clearances or approvals, where necessary. See "-- Risks Associated
with International Sales" and "Business -- Government Regulation."
 
                                       10
<PAGE>   12
 
RISKS ASSOCIATED WITH INTERNATIONAL SALES
 
     The Company intends to market the Company's products in international
markets as well as domestically. To date, all of the Company's product sales
were generated in international markets. A number of risks are inherent in
international transactions. In order for the Company to market its products in
Europe, Australia, Canada and certain other non-U.S. jurisdictions, the Company
must obtain and maintain required regulatory approvals or clearances and
otherwise comply with extensive regulations regarding safety, manufacturing
processes and quality. These regulations, including the requirements for
approvals or clearances to market, may differ from the FDA regulatory scheme and
may be subject to change or modification after the Company has obtained approval
or complied with the existing regulatory scheme. There can be no assurance that
the Company will obtain or maintain regulatory approvals or clearances in such
countries, as the case may be, or that it will not be required to incur
significant costs in obtaining or maintaining its foreign regulatory approvals
or clearances, as the case may be. In addition, in the event existing
regulations are changed or modified, there can be no assurance that the Company
will be able to comply with any such changes or modifications or that such
changes or modifications will not result in significant costs to the Company in
order to comply with such changes or modifications. Delays in receipt of
approvals or clearances to market the Company's products in international
countries, failure to receive such approvals or clearances or the future loss of
previously received approvals or clearances could have a material adverse effect
on the Company's business, prospects, financial condition and results of
operations. International sales also may be limited or disrupted by political
instability, price controls, trade restrictions and the impositions of or
changes in tariffs, any of which could have a material adverse effect on the
Company's business, prospects, financial condition and results of operations.
There can be no assurance that the Company will be able to successfully
commercialize its current or future products in any international market. See
"-- Government Regulation" and "Business -- Government Regulation."
 
TECHNOLOGICAL CHANGE
 
     The field of technology relating to the Company's research and development
activities has undergone rapid and significant technological development. The
Company expects that the technology associated with the Company's research and
development will continue to develop rapidly, and the Company's success will
depend in large part on its ability to maintain a competitive position with
respect to this technology. Rapid technological development by the Company or
others may result in products or processes becoming obsolete before the Company
recovers any or all of its research, development and commercialization expenses.
Failure of the Company to adapt to or outpace technological development, as the
case may be, could have a material adverse effect on the Company's business,
prospects, financial condition and results of operations.
 
COMPETITION
 
     There is substantial competition in the medical device and pharmaceutical
industries, both from specialized firms and from major medical device,
pharmaceutical, chemical and surgical supply companies. Many of the Company's
competitors have product development capabilities and financial and human
resources greater than the Company, and have manufacturing, marketing, sales and
distribution capabilities that the Company does not have. The Company also
competes with universities and other research institutions in the development of
technologies and processes and, in some instances, competes with others in
acquiring technology from universities and research institutions. There can be
no assurance that the Company will be able to produce medical devices or drugs
that are commercially viable. Even if the Company achieves significant product
commercialization, one or more of the Company's competitors may achieve product
commercialization or patent protection earlier or more effectively than the
Company. Further, certain products that may compete with the Company's ADCON-P
medical device are already marketed in the U.S., such as Interceed and
Seprafilm. In addition, the Company's products may be subject to competition
from related products developed by competitors or different products developed
using technology other than those developed by the Company or based on advances
that may render the Company's products less competitive, obsolete or
uneconomical. There can be no assurance that the Company will be able to compete
successfully against current or future competitors or that competition will not
have a material adverse effect on the Company's business, prospects, financial
condition and results of operations. See "Business -- Competition."
 
                                       11
<PAGE>   13
 
PATENTS, LICENSES AND PROPRIETARY RIGHTS
 
     The Company's success will depend to a significant extent on its ability to
obtain and maintain patent protection for its products and technologies, to
preserve trade secrets and to operate without infringing the proprietary rights
of others. The patent situation in the field of biopharmaceutical products
generally is highly uncertain and involves complex legal, scientific and factual
questions. To date, there has emerged no consistent policy regarding the breadth
of claims allowed in biopharmaceutical patents. Accordingly, there can be no
assurance that patent applications filed by or on behalf of the Company will
result in patents being issued or that, if issued, the patents will afford
protection against competitors with similar technology. Furthermore, there can
be no assurance that others will not independently develop similar technologies
or technologies which are superior to those developed by the Company. Because of
the extensive time required for development, testing and regulatory review of a
potential product, it is possible that before any of the Company's potential
products can be commercialized, any related patent may expire, or remain in
existence for only a short period following commercialization, thus reducing any
advantage of the patent.
 
   
     The Company owns three issued U.S. patents, one of which expires in 2014,
and two of which expire in 2015, two pending U.S. patent applications, and
corresponding foreign patent applications relating to its ADCON products. The
issued patents cover compositions included in the ADCON products and methods for
their use. Claims directed to related compositions and methods are being pursued
in the pending applications.
    
 
     The Company has been approached by a third-party regarding the potential
infringement, by the ADCON line of products, of two U.S. patents for which the
third-party is the licensee. Based upon its investigation, the Company believes
that the claims of such issued patents are invalid or not infringed by the ADCON
products. There can, however, be no assurance that the Company will not be sued
by such third party, and the Company could incur substantial costs and diversion
of management resources with respect to the defense of any such lawsuit, which
costs and diversion could have a material adverse effect on the Company's
business, prospects, financial condition and results of operations. Further,
there can be no assurance that infringement of these two patents will not be
found to exist, that the Company will not be enjoined from making, using and
selling its ADCON products, or that the Company will not be ordered to pay
damages that would have a material adverse effect on the Company's ability to
conduct its business. Moreover, there can be no assurance that a sublicense
under these patents, if necessary, will be available on reasonable terms, if at
all.
 
     A U.S. patent application, filed solely by the Company, has been issued
covering the composition of matter for a series of synthetic histamine H(3)
receptor antagonist compounds, which is due to expire in 2015. Several
additional U.S. patent applications and their corresponding foreign applications
for additional series of histamine H(3) receptor antagonists and one series of
histamine H(3) receptor agonist compounds, their methods of medical use and
pharmaceutical compositions, are pending. No assurance can be given that any
claims relating to these products and methods will be issued.
 
     The Company's processes and potential products may conflict with patents
which have been or may be granted to competitors, universities or others. As the
biopharmaceutical industry expands and more patents are issued, the risk
increases that the Company's processes and products may give rise to claims that
they infringe the patents of others. Such other persons could bring legal
actions against the Company claiming damages and seeking to enjoin manufacture,
use or sale of the affected product or process. If any such actions are
successful, in addition to any potential liability for damages, the Company
could be required to obtain a license in order to continue to manufacture, use
or sell the affected product or process. There can be no assurance that the
Company would prevail in any such action or that any license required under any
such patent would be made available on acceptable terms, if at all. If the
Company becomes involved in litigation, litigation could consume a substantial
portion of the Company's resources.
 
     The Company is prosecuting its patent applications with the U.S. Patent and
Trademark Office ("USPTO"), but the Company does not know whether any of its
applications will result in the issuance of any patents or, if any patents are
issued, whether any issued patent will provide significant proprietary
protection or will be circumvented or invalidated. During the course of patent
prosecution, patent applications are evaluated, inter alia, for utility,
novelty, nonobviousness and enablement. The USPTO may require that the claims of
an initially filed patent application be amended if it is determined that the
scope of the claims includes subject matter that is not


                                       12
<PAGE>   14
 
useful, novel, nonobvious or enabled. Furthermore, in certain instances, the
practice of a patentable invention may require a license from the holder of
dominant patent rights. In cases where one party believes that it has a claim to
an invention covered by a patent application or patent of a second party, the
first party may provoke an interference proceeding in the USPTO or such a
proceeding may otherwise be declared by the USPTO. In general, in an
interference proceeding, the USPTO would review the competing patents and/or
patent applications to determine the validity of the competing claims, including
but not limited to determining priority of invention. Any such determination
would be subject to appeal in the appropriate U.S. federal courts.
 
     There can be no assurance that additional patents will be obtained by the
Company or that issued patents will provide substantial protection or be of
commercial benefit to the Company. The issuance of a patent is not conclusive as
to its validity or enforceability, nor does it provide the patent holder with
freedom to operate without infringing the patent rights of others. A patent
could be challenged by litigation and, if the outcome of such litigation were
adverse to the patent holder, competitors could be free to use the subject
matter covered by the patent, or the patent holder may license the technology to
others in settlement of such litigation. The invalidation of key patents owned
by or licensed to the Company or non-approval of pending patent applications
could create increased competition, with potential adverse effects on the
Company and its business prospects. In addition, there can be no assurance that
any applications of the Company's technology will not infringe patents or
proprietary rights of others or that licenses that might be required as a result
of such infringement for the Company's processes or products would be available
on commercially reasonable terms, if at all.
 
     The Company cannot predict whether its or its competitors' patent
applications will result in valid patents being issued. Litigation, which could
result in substantial cost to the Company, may also be necessary to enforce the
Company's patent and proprietary rights and/or to determine the scope and
validity of the patents or proprietary rights of others. The Company may
participate in interference proceedings which may in the future be declared by
the USPTO to determine priority of invention, which could result in substantial
cost to the Company. There can be no assurance that the outcome of any such
litigation or interference proceedings will be favorable to the Company or that
the Company will be able to obtain licenses to technology that it may require or
that, if obtainable, such technology can be licensed at a reasonable cost. See
"Business -- Patents, Trademarks and Trade Secrets."
 
     The Company also relies upon unpatented trade secrets, and 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 disclose such technology, or that the Company can
meaningfully protect its right to its unpatented trade secrets.
 
EXPOSURE TO PRODUCT LIABILITY; LIMITED INSURANCE COVERAGE
 
     The research, development and commercialization of medical devices, drugs
and therapeutic products entail significant product liability risks. If the
Company succeeds in commercializing ADCON-L, ADCON-P or ADCON-T/N and if it
succeeds in developing additional devices and new drugs, the use of such
products in clinical trials and the commercial sale of such products may expose
the Company to liability claims. These claims might be made directly by
consumers or by pharmaceutical companies or others selling such products. The
Company currently has product liability insurance in an aggregate amount of two
million dollars; however, there can be no assurance that the Company will be
able to maintain such insurance on acceptable terms or that such insurance will
be sufficient to protect the Company against potential claims or that insurance
will be available in the future in amounts sufficient to protect the Company. A
product liability claim, product recall or other claim, as well as any claims
for uninsured liabilities or in excess of insured liabilities, could have a
material adverse effect on the Company's business, prospects, financial
condition and results of operations.
 
DEPENDENCE ON KEY MANAGEMENT AND QUALIFIED PERSONNEL
 
     Recruiting and retaining qualified scientific and management personnel is
critical to the Company's success. Although the Company believes that it has
been successful in attracting and retaining skilled and experienced personnel,
there can be no assurance that the Company will be able to continue to attract
and retain such personnel as employees, advisors and consultants on acceptable
terms. Certain executive officers are covered by
 
                                       13
<PAGE>   15
 
key man life insurance policies and have employment agreements with the Company.
In addition, the Company's anticipated growth and expansion into areas and
activities requiring additional expertise, such as clinical testing, obtaining
government approvals, manufacturing and marketing, will place increased demands
on the Company's management resources. These demands are expected to require the
addition of new management personnel. The Company has a limited number of
executive personnel with prior relevant business experience. The failure to
acquire additional qualified personnel could materially adversely affect
prospects for the Company's success. Certain advisors and consultants to the
Company are employed by others and may have commitments to, or consulting or
advisory contracts with, other entities that limit their availability to the
Company.
 
ANTI-TAKEOVER PROVISIONS
 
     The Company's Second Restated Certificate of Incorporation (the "Second
Restated Certificate") divides the Board of Directors into three classes. In
addition, the Board of Directors have the authority, without any action by
stockholders, to fix the rights of any shares of preferred stock, par value
$0.01 per share (the "Preferred Stock"). On July 1, 1997, the Company declared a
dividend distribution of one right (a "Right") for each outstanding share of
Common Stock. The terms of the Rights are set forth in a Rights Agreement, dated
July 1, 1997, between the Company and American Stock Transfer & Trust Company,
as Rights Agent. In the absence of further action by the Board of Directors, the
Rights generally will become exercisable and allow the holder to acquire Common
Stock at a discounted price if a person or group acquires 15% or more of the
outstanding shares of Common Stock of the Company. The Company is also subject
to provisions of the Delaware General Corporate Law which, subject to certain
exceptions, will prohibit the Company from engaging in any "business
combination" with a person who, together with affiliates and associates, owns
15% or more of the Company's Common Stock (an "Interested Stockholder") for a
period of three years following the date that such person became an Interested
Stockholder, unless the business combination is approved in a prescribed manner
or certain other requirements are satisfied. It is possible that the existence
of a staggered Board of Directors, the ability of the Board of Directors to
issue Preferred Stock and the Rights Agreement, as well as certain provisions of
the Delaware General Corporation Law, could have the effect of deterring hostile
takeovers or delaying or preventing changes in control or management of the
Company.
 
DILUTION
 
   
     Purchasers of the Common Stock offered hereby will experience immediate and
substantial dilution in the net book value per share of their investment of
$10.43 per share. See "Dilution."
    
 
SHARES ELIGIBLE FOR FUTURE SALE
 
   
     Future sales of shares of Common Stock by the Company or its existing
stockholders could adversely affect the prevailing market price of the Common
Stock. The 2,000,000 shares of Common Stock offered hereby and the 2,300,000
outstanding shares of Common Stock previously registered will be freely
transferable by persons without restriction or further registration under the
Securities Act, except for any such shares that may be acquired by an
"affiliate" of the Company, as such term is defined in Rule 144 under the
Securities Act ("Rule 144"), which shares will be subject to the resale
limitations and other limitations under Rule 144. In reliance on Rule 144, an
additional 4,889,807 shares of Common Stock are freely transferable by persons
who are not affiliates of the Company. An additional 435,041 shares of Common
Stock held by affiliates of the Company are eligible for sale in the public
market subject to compliance with the resale volume limitations and other
restrictions of Rule 144. The Company has registered on Form S-8, 1,460,000
shares of Common Stock reserved for issuance under the Company's stock option
plans as of the date of this Prospectus. Of the 5,324,848 outstanding shares of
Common Stock eligible for sale under Rule 144, 435,041 shares are subject to
lock-up agreements with the Underwriters pursuant to which the Company's
directors and executive officers and certain stockholders have agreed for a
period of 90 days following the date of this Prospectus that they will not,
without the prior written consent of Cowen & Company, offer, sell, contract to
sell or otherwise dispose of any shares of Common Stock or securities
convertible into, exchangeable or exercisable for Common Stock, except pursuant
to the Underwriting Agreement and except that the Company may grant stock
options or issue shares upon the exercise of options previously granted. In
addition, the Company has granted certain demand and "piggyback" registration
rights to certain of its existing stockholders with respect to 1,333,069 of the
foregoing shares. Sales of
    
 
                                       14
<PAGE>   16
 
substantial amounts of Common Stock in the public market, or the perception that
such sales may occur, could have a material adverse effect on the market price
of the Common Stock.
 
FORWARD-LOOKING STATEMENTS
 
   
     Certain statements in this Prospectus constitute "forward-looking
statements." When used in this Prospectus, the words "believes," "anticipates,"
"expects," "intends" and other predictive, interpretive and similar expressions
are intended to identify such forward-looking statements. Such forward-looking
statements involve known and unknown risks, uncertainties and other factors
which may cause the actual results of the Company to be different from
expectations expressed or implied by such forward-looking statements. Such
factors include, but are not limited to, commercial uncertainty of market
acceptance of the Company's ADCON family of products, delays in product
development of ADCON products other than ADCON-L, uncertainty due to the early
stage of development for the therapeutic programs, the possible need for
additional funding, the ability of the Company to establish and maintain
collaborative arrangements with others, the potential market size for ADCON
products, the ability to renew research collaborations, the productivity of
distributors of the ADCON products, shortages of supply of ADCON products from
the Company's sole manufacturer, the lack of supply of raw materials for the
Company's products, particularly from the sole source supplier of certain key
components for its ADCON products, uncertainty of future profitability,
uncertainties related to the Company's proprietary rights in its products, the
loss of key management personnel, and technological change. These statements are
based on certain assumptions and analysis made by the Company in light of its
experience and its perception of historical trends, current conditions, expected
future developments and other factors it believes are appropriate in the
circumstances. Such statements are subject to a number of other assumptions,
risks, uncertainties, general economic and business conditions, and the business
opportunities (or lack thereof) that may be presented to and pursued by the
Company. Prospective investors are cautioned that any such statements are not
indicative of future performance and that actual results or developments may
differ materially from those projected in the forward-looking statements. The
accompanying information contained in this Prospectus, including, without
limitation, the information set forth in this section and under the headings
"Management's Discussion and Analysis of Financial Condition and Results of
Operations" and "Business" identifies important factors that could cause such
differences.
    
 
                                       15
<PAGE>   17
 
                                USE OF PROCEEDS
 
   
     The net proceeds to the Company from the sale of the 2,000,000 shares of
Common Stock offered hereby at an assumed public offering price of $14.00 per
share (the last sale price on June 17, 1998) and after deducting underwriting
discounts and commissions and estimated offering expenses will be approximately
$25,840,000 ($29,777,500 if the Underwriters' over-allotment option is exercised
in full).
    
 
     The Company intends to use the net proceeds of this offering for the
funding of the U.S. development of ADCON-P and ADCON-T/N, for the costs
associated with the market introduction in the U.S. of ADCON-L, for the
continued research and development of the Company's drug programs and additional
ADCON products, and for working capital and other general corporate purposes. To
date, the Company has funded the development of its ADCON family of products and
Cognition Modulation programs independently of strategic partners. The Company,
however, may enter into agreements with strategic partners for certain of its
ADCON products, other than ADCON-L, and does not anticipate funding clinical
trials relating to its Cognition Modulation program through completion of such
clinical trials without the collaboration of a strategic partner. The actual
amount and the timing of expenditures for each of the foregoing uses of proceeds
from this offering will depend on the progress of the Company's clinical trials
and sales of ADCON-P, ADCON-L and ADCON-T/N, its research and development
efforts, its success in entering into strategic alliances, the timing of
regulatory approvals and technological advances, and determinations as to the
commercial potential and status of competitive products. Pending such uses, the
Company intends to invest such funds in short-term, interest-bearing, investment
grade securities.
 
                          PRICE RANGE OF COMMON STOCK
                              AND DIVIDEND POLICY
 
     The Company's Common Stock is quoted on the Nasdaq National Market under
the symbol "GLIA." The following table sets forth for the periods indicated the
high ask and low bid prices for the Company's Common Stock:
 
   
<TABLE>
<CAPTION>
                                                              HIGH          LOW
                                                              ----          ----
<S>                                                           <C>           <C>
1998
  Second Quarter (through June 17, 1998)....................  $20           $11-1/2
  First Quarter.............................................   12-1/4         7-7/8
1997
  Fourth Quarter............................................  $14           $ 7-5/8
  Third Quarter.............................................   12-1/8         7-3/4
  Second Quarter............................................   10-1/4         7-5/8
  First Quarter.............................................   14-3/8         7-11/16
1996
  Fourth Quarter............................................  $10-1/8       $ 7-5/8
  Third Quarter.............................................   11             6-5/8
  Second Quarter............................................   15-1/2         9
  First Quarter.............................................   16-3/4         8
</TABLE>
    
 
   
     The last sale price of Common Stock on June 17, 1998, as reported on the
Nasdaq National Market was $14.00 per share. There were approximately 277
holders of record of Common Stock of the Company as of May 30, 1998.
    
 
     The Company has never declared or paid any cash dividends on its capital
stock and does not anticipate paying any cash dividends in the foreseeable
future. The payment of future dividends, if any, will be at the discretion of
the Company's Board of Directors after taking into account various factors,
including the Company's financial condition, operating results, current and
anticipated cash needs and plans for expansion.
 
                                       16
<PAGE>   18
 
                                 CAPITALIZATION
 
   
     The following table sets forth at March 31, 1998 the actual capitalization
of the Company and the capitalization of the Company as adjusted to reflect the
sale by the Company of the 2,000,000 shares of Common Stock offered hereby at an
assumed public offering price of $14.00 per share (the last sale price on June
17, 1998) after deducting underwriting discounts and commissions and estimated
offering expenses payable by the Company.
    
 
   
<TABLE>
<CAPTION>
                                                                     MARCH 31, 1998
                                                              ----------------------------
                                                                 ACTUAL       AS ADJUSTED
                                                              ------------    ------------
                                                                      (UNAUDITED)
<S>                                                           <C>             <C>
Stockholders' equity:
Preferred Stock, $0.01 par value, 5,000,000 shares
  authorized, none issued or outstanding....................  $         --    $         --
Common Stock, $0.01 par value, 30,000,000 shares authorized;
  issued and outstanding -- 7,601,273 actual and 9,601,273
  as adjusted(1)............................................        76,013          96,013
Additional paid-in capital..................................    53,377,810      79,197,810
Deficit accumulated during the development stage............   (44,206,479)    (44,206,479)
                                                              ------------    ------------
  Total stockholders' equity................................     9,247,344      35,087,344
                                                              ------------    ------------
  Total capitalization......................................  $  9,247,344      35,087,344
                                                              ============    ============
</TABLE>
    
 
- ------------------
 
   
(1) Excludes an aggregate of 1,107,175 shares of Common Stock issuable upon
    exercise of stock options outstanding at March 31, 1998 at a weighted
    average exercise price of $7.54 per share granted under the Company's stock
    option plans. An additional 20,000 shares of Common Stock have been reserved
    for issuance upon the exercise of warrants at an exercise price of $7.50 per
    warrant, subject to certain adjustments.
    
 
                                    DILUTION
 
   
     The net tangible book value of the Company at March 31, 1998 was
$8,442,916, or approximately $1.11 per share of Common Stock. Net tangible book
value per share represents the amount of the Company's tangible assets less
total liabilities, divided by the total number of shares of Common Stock
outstanding. Dilution per share represents the difference between the amount per
share paid by investors in this offering and the pro forma net tangible book
value per share upon completion of this offering. After giving effect to the
sale of shares of Common Stock offered by the Company hereby at an assumed
offering price of $14.00 per share (the last sale price on June 17, 1998) and
after receipt of the estimated net proceeds therefrom of $25,840,000 (after
deducting the underwriting discounts and commissions and estimated offering
expenses payable by the Company), the pro forma net tangible book value of the
Company as of March 31, 1998 would have been $34,282,916, or $3.57 per share of
Common Stock. This represents an immediate increase in net tangible book value
of $2.46 per share to existing stockholders and an immediate dilution of $10.43
per share to purchasers in this offering.
    
 
     The following table illustrates the dilution per share as described above:
 
   
<TABLE>
<S>                                                           <C>     <C>
Assumed public offering price per share.....................          $14.00
  Net tangible book value per share prior to the offering...  $1.11
  Increase per share attributable to new investors..........   2.46
                                                              -----
Pro forma net tangible book value per share after the
  offering(1)...............................................            3.57
                                                                      ------
Dilution per share to new investors.........................          $10.43
                                                                      ======
</TABLE>
    
 
- ---------------
 
   
(1) Excludes an aggregate of 1,107,175 shares of Common Stock issuable upon
    exercise of stock options outstanding at March 31, 1998 at a weighted
    average exercise price of $7.54 per share granted under the Company's stock
    option plans. An additional 20,000 shares of Common Stock have been reserved
    for issuance upon the exercise of warrants at an exercise price of $7.50 per
    warrant, subject to certain adjustments.
    
 
                                       17
<PAGE>   19
 
                      SELECTED CONSOLIDATED FINANCIAL DATA
 
     The following selected consolidated financial data of the Company for the
years ended December 31, 1993 through 1997, the three months ended March 31,
1997 and 1998, and the period from inception of operations (August 31, 1988)
through March 31, 1998 are derived from the consolidated financial statements of
the Company. The information presented below should be read in conjunction with
the Company's Consolidated Financial Statements and related Notes and
"Management's Discussion and Analysis of Financial Condition and Results of
Operations" included elsewhere in this Prospectus.
 
                     (IN THOUSANDS, EXCEPT PER SHARE DATA)
 
<TABLE>
<CAPTION>
                                                                                                                  PERIOD FROM
                                                                                                                 INCEPTION OF
                                                                                           THREE MONTHS           OPERATIONS
                                              YEAR ENDED DECEMBER 31,                     ENDED MARCH 31,      (AUGUST 31, 1988)
                               -----------------------------------------------------   ---------------------   THROUGH MARCH 31,
                                1993      1994       1995        1996        1997        1997        1998            1998
                               -------   -------   ---------   ---------   ---------   ---------   ---------   -----------------
                                                                                            (UNAUDITED)           (UNAUDITED)
<S>                            <C>       <C>       <C>         <C>         <C>         <C>         <C>         <C>
STATEMENT OF OPERATIONS DATA:
Revenues
  Research contracts and
    licensing fees...........  $    --   $   918   $   2,217   $   2,855   $   2,954   $     739   $     739       $  9,682
  Product sales..............       --        86         182         901       1,536         345         512          3,217
  Government grants..........      302       141         255         122         410          50         150          1,651
                               -------   -------   ---------   ---------   ---------   ---------   ---------       --------
    Total revenues...........      302     1,145       2,654       3,878       4,900       1,134       1,401         14,550
Operating costs and expenses
  Research and development...    4,441     4,600       5,107       6,120       6,952       1,855       2,253         36,251
  Selling, general and
    administrative...........    1,674     2,365       2,599       4,070       4,401       1,070       1,233         19,813
  Depreciation and
    amortization.............      312       272         170         166         293          65          87          1,824
  Cost of product sales......       --        58         123         342         614         125         167          1,303
                               -------   -------   ---------   ---------   ---------   ---------   ---------       --------
    Total operating costs and
      expenses...............    6,427     7,295       7,999      10,698      12,260       3,115       3,740         59,191
                               -------   -------   ---------   ---------   ---------   ---------   ---------       --------
Loss from operations.........   (6,125)   (6,150)     (5,345)     (6,820)     (7,360)     (1,981)     (2,339)       (44,641)
Settlement of claim..........                                                 (2,025)                                (2,025)
Interest income, net.........      211        98         360       1,120         824         237         147          3,399
                               -------   -------   ---------   ---------   ---------   ---------   ---------       --------
Net loss.....................  $(5,914)  $(6,052)  $  (4,985)  $  (5,700)  $  (8,561)  $  (1,744)  $  (2,192)      $(43,267)
                               =======   =======   =========   =========   =========   =========   =========       ========
Basic and diluted net loss
  per common share...........            $(35.14)  $   (3.28)  $   (0.78)  $   (1.16)  $   (0.24)  $   (0.29)
                                         =======   =========   =========   =========   =========   =========
Shares used for purposes of
  computing basic and diluted
  net loss per common
  share......................                172       1,519       7,313       7,354       7,333       7,451
</TABLE>
 
<TABLE>
<CAPTION>
                                                                    AT DECEMBER 31,                              AT
                                                --------------------------------------------------------     MARCH 31,
                                                  1993        1994        1995        1996        1997          1998
                                                --------    --------    --------    --------    --------    ------------
                                                                                                            (UNAUDITED)
<S>                                             <C>         <C>         <C>         <C>         <C>         <C>
BALANCE SHEET DATA:
Cash, cash equivalents and short-term
  investments................................   $  4,321    $  4,671    $ 23,023    $ 17,996    $ 11,542      $  8,042
Working capital..............................      2,860       1,511      21,762      15,821       9,370         7,136
Total assets.................................      6,148       6,716      25,346      20,804      14,805        11,659
Deficit accumulated during the development
  stage......................................    (16,716)    (22,768)    (27,754)    (33,454)    (42,014)      (44,206)
Total stockholders' equity...................      4,177       3,122      23,182      17,627      11,440         9,247
</TABLE>
 
                                       18
<PAGE>   20
 
                    MANAGEMENT'S DISCUSSION AND ANALYSIS OF
                 FINANCIAL CONDITION AND RESULTS OF OPERATIONS
 
     This Prospectus contains forward-looking statements which involve risks and
uncertainties. The Company's actual results may differ significantly from the
results discussed in the forward-looking statements. Factors that might cause
such a difference include, but are not limited to, those discussed below and in
"Risk Factors," as well as those discussed elsewhere in this Prospectus.
 
OVERVIEW
 
   
     Since commencing operations in 1988, the Company has been a development
stage company. The Company is engaged in the research, development and
commercialization of its ADCON family of products, which are proprietary,
resorbable, carbohydrate polymer medical devices designed to inhibit surgical
scarring and adhesions. Based on European pivotal clinical studies and other
compliance efforts and submission of data, the Company obtained regulatory
clearance to affix CE Marking on ADCON-L and ADCON-T/N in August 1995 and
January 1996, respectively, thereby allowing ADCON-L and ADCON-T/N to be
marketed in the 19 European countries which recognize CE Marking. ADCON-L and
ADCON-T/N are currently being marketed in 29 countries outside the U.S. through
independent medical device distributors for lumbar disc surgery and tendon and
peripheral nerve surgeries, respectively. On May 27, 1998, the Company received
approval from the FDA to market ADCON-L in the U.S. As a result, the Company has
recently commenced marketing ADCON-L in the U.S. In addition, the Company signed
a development and exclusive license agreement in December 1996 with Chugai for
the sale of ADCON-L and ADCON-T/N in Japan. Further, the Company is pursuing the
development of small molecule drug candidates for the treatment of several
nervous system disorders, including ADHD, sleep disorders, obesity, anxiety and
AD. In October 1994, the Company entered into a strategic alliance with Janssen
to collaborate on the discovery and development of therapeutic products to treat
AD. In September 1995, the scope of the alliance was expanded and the current
arrangement extends through October 1998. Since inception, the Company's
revenues have been derived primarily from contract research payments relating to
its strategic alliance with Janssen. The Company has also received revenues from
product sales of ADCON-L and ADCON-T/N outside the U.S. as well as from various
government grants awarded to the Company. The Company anticipates that a
significant portion of revenue from product sales will be derived from its ADCON
family of products, primarily ADCON-L. See "Business -- Janssen Agreement."
    
 
     The Company is a development stage company that has not generated any
material revenues from operations. As a result, the Company has had net
operating losses since its inception and expects such losses to continue unless
and until such time as revenues are sufficient to fund its current operations.
The Company has accumulated a deficit of $44.2 million for the period from
inception of operations (August 31, 1988) through March 31, 1998. The Company
expects to continue to incur a loss over at least the next several years and the
amount of future net losses and time required by the Company to reach
profitability are uncertain. See "Risk Factors -- History of Operating Losses
and Accumulated Deficit; Uncertainty of Future Profitability; Fluctuating
Results of Operations."
 
RESULTS OF OPERATIONS
 
  For the three months ended March 31, 1998 and 1997
 
     Total revenues increased approximately 23.5% to $1.4 million in the first
quarter of 1998 from $1.1 million in the first quarter of 1997. The increase in
total revenues was primarily a result of a 48.4% increase in product sales to
$512,000 in the first quarter of 1998 from $345,000 in the first quarter of
1997. This increase in product sales primarily resulted from increased sales of
the Company's ADCON-L product, and to a lesser extent, the Company's ADCON-T/N
product in certain European countries, as well as other countries outside the
U.S.
 
     The Company's government-funded grant revenues increased to $150,000 in the
first quarter of 1998 from $50,000 in the first quarter of 1997. This increase
was primarily due to the award in February 1997 of a Phase II Small Business
Innovation Research ("SBIR") Program two year grant from the National Institute
of Neurological Disorders and Stroke ("NINDS") for research to evaluate the use
of histamine H(3) receptor antagonists in treating ADHD. The increase also
resulted from an award in the fourth quarter of 1997 of two
 
                                       19
<PAGE>   21
 
$100,000 Phase I SBIR Program grants: (i) from NINDS for research to evaluate
the molecular characterization of the histamine receptor subtype and (ii) from
the National Institute of Nursing Research ("NINR") for research to evaluate the
inhibition of postoperative gynecological adhesions.
 
     Total operating expenses increased by approximately 20.1% to $3.7 million
in the first quarter of 1998, compared to $3.1 million in the first quarter of
1997. Cost of products sold increased to $167,000 in the first quarter of 1998
compared to $125,000 in the first quarter of 1997, but decreased as a percentage
of product sales in the first quarter of 1998 to 32.6% from 36.2% in the first
quarter of 1997. This decrease as a percentage of sales was primarily due to
improved efficiencies and the absorption of manufacturing overhead costs as a
result of increased production volumes.
 
     Research and development expenses increased by approximately 21.5% to $2.3
million in the first quarter of 1998 from $1.9 million in the first quarter of
1997. This increase was primarily due to: (i) increased research contract
expenses and purchases of materials for animal toxicology and other preclinical
studies for the lead compound which is being developed by the Company for its
Cognition Modulation program; and (ii) increased staffing and clinical research
costs associated with preclinical and clinical development of ADCON-P.
 
     Selling, general and administrative expenses increased 15.2% to $1.2
million in the first quarter of 1998 compared to $1.1 million in the first
quarter of 1997. This increase was primarily due to an increase in sales and
marketing expenses resulting from the Company's preparations in anticipation of
final approval by the FDA for ADCON-L.
 
     Depreciation and amortization expense was $87,000 in the first quarter of
1998 compared to $65,000 in the first quarter of 1997. The increase was
primarily due to increased amortization resulting from leasehold improvements
made in 1997 and 1996.
 
     Net interest income decreased to $147,000 in the first quarter of 1998 from
$237,000 in the first quarter of 1997. This decrease was due to lower cash and
cash equivalents and short-term investment balances during the first quarter of
1998 as compared to the first quarter of 1997.
 
     The Company's net loss increased 25.7% to $2.2 million in the first quarter
of 1998, compared to $1.7 million in the first quarter of 1997. The increase in
net loss was a result of increased total expenses, which were slightly offset by
increased revenues as discussed above. The basic and diluted net loss per common
share was $0.29 in the first quarter of 1998, compared to $0.24 in the first
quarter of 1997.
 
  Fiscal Years ended December 31, 1997 and 1996
 
     Total revenues increased approximately 26.4% to $4.9 million in 1997 from
$3.9 million in 1996. The increase in total revenues was primarily a result of a
70.5% increase in product sales to $1.5 million in 1997 from $901,000 in 1996.
This increase in product sales primarily resulted from increased sales of the
Company's ADCON-L and ADCON-T/N products in certain European countries, as well
as other countries outside the U.S. In addition, research contract revenues
increased slightly to $3.0 million in 1997 from $2.9 million in 1996. These
research contract revenues were from the Company's research contract with
Janssen.
 
     The Company's government-funded grant revenues increased to $410,000 in
1997 from $122,000 in 1996. This increase was primarily due to the award in
February 1997 of a Phase II SBIR Program two year grant from the NINDS for
research to evaluate the histamine H(3) receptor antagonists to treat ADHD. In
addition, in the fourth quarter of 1997, the Company was awarded two $100,000
Phase I SBIR Program grants: (i) from NINDS for research to evaluate the
molecular characterization of the histamine receptor subtype and (ii) from the
NINR for research to evaluate the inhibition of postoperative gynecological
adhesions.
 
     Total operating expenses increased by approximately 14.6%, to $12.3 million
in 1997 compared to $10.7 million in 1996. Cost of products sold increased to
$614,000 in 1997 compared to $342,000 in 1996 and increased as a percentage of
product sales in 1997 to 40.0% from 37.9% in 1996. This increase was primarily
due to slightly increased manufacturing overhead costs which were added in
anticipation of larger planned production volumes which were not obtained in
1997.
 
                                       20
<PAGE>   22
 
     Research and development expenses increased by approximately 13.6% to $7.0
million in 1997 from $6.1 million in 1996. This increase was primarily due to:
(i) increased research contract expenses and purchases of materials for
preclinical and animal toxicology studies for the lead compound which is being
developed by the Company for the treatment of ADHD; (ii) increased staffing and
clinical consulting costs associated with the PMA filed with the FDA for
ADCON-L; (iii) increased costs associated with the development of a new delivery
system for ADCON-L and (iv) increased staffing and clinical research costs
associated with preclinical and clinical development of ADCON-P.
 
     Selling, general and administrative expenses increased 8.1% to $4.4 million
in 1997, compared to $4.1 million in 1996. The increase was primarily due to
increases in expenses resulting from the Company's sales and marketing efforts
for ADCON-L and ADCON-T/N in certain European markets and other selected
countries outside of the U.S.
 
     Depreciation and amortization expense was $293,000 in 1997 compared to
$166,000 in 1996. The increase was primarily due to increased amortization
resulting from leasehold improvements made in 1996 and 1997.
 
     Net interest income decreased 26.4% to $824,000 in 1997 from $1.1 million
in 1996. This decrease was due to lower cash and cash equivalents and short-term
investment balances throughout 1997 as compared to 1996.
 
     In the fourth quarter of 1997, the Company incurred a one-time non-cash
charge of $2.0 million relating to the Company's settlement of litigation
involving the Company.
 
     The Company's net loss increased 50.2% to $8.6 million in 1997, compared to
$5.7 million in 1996. The net loss, excluding a one-time non-cash charge of $2.0
million for settlement of the litigation, increased 14.7% to $6.5 million in
1997 from $5.7 million in 1996. The increase in net loss was a result of
increased total expenses, which were slightly offset by increased revenues as
discussed above. The net loss per share was $1.16 in 1997, compared to $0.78 in
1996 and, excluding the one-time non-cash charge for settlement of the
litigation, $0.89 in 1997.
 
  Fiscal Years ended December 31, 1996 and 1995
 
     Total revenues increased approximately 46.1% to $3.9 million in 1996 from
$2.7 million in 1995. The increase in total revenues was primarily the result of
an increase in product sales to $901,000 in 1996 from $182,000 in 1995. The
increase in product sales in 1996 resulted from sales of the Company's ADCON-L
and ADCON-T/N products in certain European countries, as well as Australia and
New Zealand.
 
     The Company had research contract revenues in 1996 of $2.9 million from its
research contract with Janssen compared to research revenues of $2.2 million in
1995. In September 1995, the Company entered into an addendum to the Janssen
Agreement in order to expand the scope of the collaboration with Janssen on AD
to include research and development relating to inhibitors of complement
activation. This addendum to the Janssen Agreement added approximately $875,000
to research contract revenues in 1996 and $290,000 to research contract revenues
in 1995. Under the terms of the expanded agreement, Janssen increased its
research funding and milestone payments by 50% beginning in September 1995.
 
     The Company's government-funded research grant revenues were $122,000 in
1996 and $255,000 in 1995. The level of grant revenues were a direct result of
the number of government-funded research grants awarded the Company in each
year.
 
     Total operating expenses were $10.7 million in 1996 compared to $8.0
million in 1995. Cost of products sold increased 178.6% to $342,000 in 1996 from
$123,000 in 1995. The increase in cost of products sold was due primarily to the
increases in product sales for the corresponding period. However, cost of
products sold decreased as a percentage of product sales in 1996 to 37.9% from
67.3% in 1995. This decrease was primarily due to improved absorption of
manufacturing overhead costs as a result of increased production volumes in
1996. In both periods, cost of products sold included costs associated with the
start-up of manufacturing processes with EMCM, a third party manufacturer of
ADCON-L and ADCON-T/N.
 
     Expenses for research and development increased 19.8% to $6.1 million in
1996 from $5.1 million in 1995. This increase was due primarily to increased
staffing and clinical contract expenses resulting from the initiation of
                                       21
<PAGE>   23
 
pivotal clinical trials in the U.S. for both ADCON-L and ADCON-T/N beginning in
the fourth quarter of 1995 and continuing throughout 1996. Additionally, the
increase is a result of additions in staffing and purchases of laboratory
supplies and services relating to increased research activities beginning in the
first quarter of 1996 with respect to AD and Cognition Modulation programs as
well as write-offs of costs associated with patents which were abandoned due to
changes in the technology pursuits of the Company. Increased expenses associated
with the Company's AD program are funded under the Company's research agreement
with Janssen.
 
     Selling, general and administrative expenses increased 56.6% to $4.1
million in 1996 from $2.6 million in 1995. This increase was primarily due to an
increase in sales and marketing expenses as the Company continued to expand its
sales and marketing efforts for its ADCON-L and ADCON-T/N products in Europe and
in other countries outside the U.S. Additionally, the Company incurred increased
general and administrative expenses of $230,000 in 1996 associated with the
filing of a registration statement with the Securities and Exchange Commission
(the "Commission") for an offering of Common Stock which was subsequently
withdrawn due to unfavorable market conditions. The Company also incurred
increased general and administrative expenses in 1996 associated with its first
full year of reporting as a publicly traded company.
 
     Depreciation and amortization expense was $166,000 in 1996 compared to
$170,000 in 1995. This expense decreased because several Company assets had
become fully depreciated.
 
     Net interest income increased 211.2% to $1.1 million in 1996 from $360,000
in 1995. The increase in 1996 was due primarily to the interest earned on the
cash received on the October 1995 initial public offering of Common Stock. In
addition, interest expense decreased in both periods as the Company paid down
its line of credit and fully repaid its capital leases.
 
     The Company's net loss increased 14.3% to $5.7 million in 1996, compared to
$5.0 million in 1995. The increase in net loss was a result of increased total
expenses, which were slightly offset by increased revenues as discussed above.
The net loss per share was $0.78 in 1996, compared to $3.28 in 1995.
 
LIQUIDITY AND CAPITAL RESOURCES
 
     Since inception, the Company has financed its operations primarily through
the private placement and public offering of its equity securities, research
contract licensing fees, and, to a lesser extent, through federally-sponsored
research grants. Since its inception, the Company has received $49.3 million in
net proceeds from equity financings. In addition, from its inception through
March 31, 1998, the Company has recognized revenue of $9.7 million from its
research agreement with Janssen, $3.2 million from product sales and $1.7
million from several federally-sponsored research grants. The Company has also
established a $1.5 million line of credit with a bank, secured by certain assets
of the Company. As of March 31, 1998, the Company had no borrowings against the
line of credit.
 
     In order to preserve principal and maintain liquidity, the Company's funds
are invested in commercial paper and other short-term investments. As of March
31, 1998, December 31, 1997 and December 31, 1996, the Company's cash and cash
equivalents and short-term investments totaled $8.0 million, $11.5 million and
$18.0 million, respectively. The Company is currently evaluating possible
alternative facilities in Ohio, Massachusetts and North Carolina for its
operations; however, no definitive plans have been made as of the date hereof.
The Company expects that its existing capital resources, together with the net
proceeds of this offering and interest earned thereon, will enable the Company
to maintain its current and planned operations for at least the next two years.
The Company may need to raise substantial additional capital to fund its
operations prior to such time. The Company's future capital requirements will
depend on, and could increase as a result of, many factors, including, but not
limited to, the costs of commercialization of ADCON-L, the commercial success of
its ADCON family of products, the progress of the Company's research and
development, including the costs related to its Cognition Modulation and AD
programs, the scope, timing and results of preclinical studies and clinical
trials, the cost and timing of obtaining regulatory approvals, its success in
obtaining the strategic alliances required to fund certain of its programs, the
rate of technological advances, determinations as to the commercial potential of
certain of the Company's product candidates, the status of competitive products,
the establishment of additional manufacturing capacity and the possible
relocation of the Company's facilities.
 
                                       22
<PAGE>   24
 
     In 1995 and 1996, the Company received revenues from two Phase I SBIR
grants for up to $100,000 each from the NINDS division of the National Institute
of Health relating to the development of histamine H(3) receptor agents. In
February 1997, the Company was awarded a Phase II SBIR Program grant from the
NINDS for research evaluating histamine H(3) receptor antagonists to treat ADHD.
The grant has a two-year term and may provide as much as $750,000 in funding. If
the Company is successful in other Phase I research, additional Phase II awards
may be sought for funding to aid in further development of pharmaceutical
compounds; however, there is no assurance that such Phase I research will be
successful or that additional funding will be obtained. In addition, in the
fourth quarter of 1997, the Company was awarded two Phase I SBIR grants for up
to $100,000 each from the NINDS and the NINR divisions of the National Institute
of Health.
 
     The Company does not expect to generate a positive cash flow from
operations for several years due to the substantial costs for commercialization
of its ADCON family of products, additional research and development costs for
ADCON-A, ADCON-I and ADCON-C and for costs related to its Cognition Modulation
and AD programs, preclinical testing, clinical trials and operating expenses
associated with supporting such activities.
 
     The Company may raise additional funds through additional equity or debt
financing, government grants, further corporate alliances, collaborative
relationships, or otherwise. The Company may engage in these capital raising
activities even if it does not have an immediate need for additional capital at
that time. There can be no assurance that any such additional funding will be
available to the Company or, if available, that it will be on acceptable terms.
If additional funds are raised by issuing equity securities, further dilution to
existing shareholders may result. If adequate funds are not available, the
Company may be required to delay, reduce the scope of, or eliminate one or more
of its research, development or clinical trials. If the Company seeks to obtain
funds through arrangements with collaborative partners or others, such partners
may require the Company to relinquish rights to certain of its technologies,
product candidates or products that the Company would otherwise seek to develop
or commercialize itself.
 
     As of December 31, 1997, the Company has available for Federal income tax
purposes net operating loss carryforwards of approximately $17.5 million and
research and development credit carryforwards of approximately $2.2 million.
These carryforwards expire at various dates between 2003 and 2012. Pursuant to
the Tax Reform Act of 1986, the utilization of net operating loss and research
and development tax credit carryforwards for tax purposes may be subject to an
annual limitation if a cumulative change in ownership of more than 50% occurs
over a three-year period. The issuance of securities by the Company and/or sales
of securities by the Company's principal stockholders could result in such a
change in ownership. The Company has offset the tax benefit of the net operating
loss and tax credit carryforwards with a valuation allowance as realization of
the benefit is not assured. See Note F of Notes to Consolidated Financial
Statements incorporated herein by reference.
 
YEAR 2000
 
     The Company has conducted a review of its information system to identify
any issues that could be affected by the year 2000. Although the Company
believes that its information systems are able to process year and date
information beyond the year 1999, the Company is unable to determine the extent
to which year 2000 issues will affect its independent distributors or EMCM in
tracking sales, orders or shipments of the Company's devices or drugs, as the
case may be. Any interruption in the manufacturing or marketing of the Company's
products could have a material adverse effect on the Company's business,
prospects, financial condition or results of operations.
 
FORWARD-LOOKING STATEMENTS
 
   
     Certain statements in this Prospectus constitute "forward-looking
statements." When used in this Prospectus, the words "believes," "anticipates,"
"expects," "intends" and other predictive, interpretive and similar expressions
are intended to identify such forward-looking statements. Such forward-looking
statements involve known and unknown risks, uncertainties and other factors
which may cause the actual results of the Company to be different from
expectations expressed or implied by such forward-looking statements. Such
factors include, but are not limited to, commercial uncertainty of market
acceptance of the Company's ADCON family of products, delays in product
development of ADCON products other than ADCON-L, uncertainty due to the early
    
 
                                       23
<PAGE>   25
 
stage of development for the therapeutic programs, the possible need for
additional funding, the ability of the Company to establish and maintain
collaborative arrangements with others, the potential market size for ADCON
products, the ability to renew research collaborations, the productivity of
distributors of the ADCON products, shortages of supply of ADCON products from
the Company's sole manufacturer, the lack of supply of raw materials for the
Company's products, particularly from the sole source supplier of certain key
components for its ADCON products, uncertainty of future profitability,
uncertainties related to the Company's proprietary rights in its products, the
loss of key management personnel, and technological change. These statements are
based on certain assumptions and analysis made by the Company in light of its
experience and its perception of historical trends, current conditions, expected
future developments and other factors it believes are appropriate in the
circumstances. Such statements are subject to a number of other assumptions,
risks, uncertainties, general economic and business conditions, and the business
opportunities (or lack thereof) that may be presented to and pursued by the
Company. Prospective investors are cautioned that any such statements are not
indicative of future performance and that actual results or developments may
differ materially from those projected in the forward-looking statements. The
accompanying information contained in this Prospectus, including, without
limitation, the information set forth in this section and under the headings
"Risk Factors" and "Business" identifies important factors that could cause such
differences.
 
                                       24
<PAGE>   26
 
                                    BUSINESS
 
OVERVIEW
 
   
     Gliatech is a leader in the research, development and commercialization of
proprietary, resorbable, carbohydrate polymer medical devices designed to
inhibit surgical scarring and adhesions. The Company has developed its family of
ADCON medical devices to be used prophylactically as a barrier between tissues
to inhibit scarring and adhesions in all patients undergoing certain surgical
procedures. The Company's most developmentally advanced product, ADCON-L, a
proprietary, resorbable, carbohydrate polymer gel, is designed to inhibit
surgical scarring and adhesions and to reduce postsurgical pain following lumbar
surgeries. On May 27, 1998, the Company received a letter from the FDA approving
the PMA for ADCON-L, which permits the Company to market ADCON-L in the U.S. As
a result, the Company has recently commenced marketing ADCON-L in the U.S.
ADCON-L is also being marketed in 29 countries outside the U.S., including the
19 countries which recognize CE Marking. In addition to the ADCON family of
medical devices, the Company is pursuing the development of small molecule drug
candidates for the treatment of several central nervous system disorders,
including ADHD, sleep disorders, obesity, anxiety and AD. The Company is
pursuing its AD program through its strategic alliance with Janssen, a
wholly-owned subsidiary of Johnson & Johnson. See "Risk Factors -- Early
Commercialization; Uncertainty of Market Acceptance of ADCON Family of
Products," "-- Reliance on Third Party for Manufacturing; Comprehensive
Regulation of Manufacturing of Products" and "-- Government Regulation."
    
 
     Surgical scarring is a significant medical problem often resulting in
adhesions at the surgical site, thereby binding together tissues, nerves and
organs following either open incision or minimally invasive surgery. Scarring
and adhesions may lead to many significant postsurgical complications, including
recurrent pain and impairment of function following lumbar surgery, infertility
following pelvic surgery and limited range of motion following tendon and
peripheral nerve surgery of the hand. Excessive scarring also can obstruct
access to the surgical site when reoperation is necessary making additional
surgery difficult. Due to the differences in the surgical environments in which
each of these products would be used, each ADCON product is designed to be
adapted for use at the different surgical sites. ADCON-L is designed to inhibit
scarring and adhesions and reduce postsurgical pain following lumbar surgery. In
1995, approximately 450,000 lumbar surgeries were performed in the U.S. The
Company's European clinical trial has shown that approximately 90% of lumbar
surgery patients experience a certain amount of scarring following such surgery.
This clinical trial also demonstrated that 8% to 44% of patients who received
ADCON-L experienced a lower incidence of activity-related pain in the
performance of all evaluated activities of daily living.
 
     The Company is also developing ADCON-P, a proprietary, resorbable,
carbohydrate polymer solution, which is designed to inhibit pelvic and
gynecological postsurgical scarring and adhesions, which may lead to infertility
or difficulty in conceiving. In 1994, approximately 1.3 million gynecological
surgeries related to infertility were performed in the U.S. Independent studies
have shown that more than 55% of patients undergoing such surgeries experience
some postsurgical scarring and adhesions. The Company has initiated a
double-blind, controlled, clinical trial and has completed enrollment of 41
patients; 23 patients for evaluation in reoperations to remove adhesions and 18
patients for evaluation in uterine tumor surgeries. Upon completion of the pilot
trial, which is currently anticipated to occur in the second half of 1998, the
Company intends to submit a request to the FDA to conduct a pivotal clinical
trial for ADCON-P. See "Risk Factors -- Early Commercialization; Uncertainty of
Market Acceptance of ADCON Family of Products," "-- Uncertainty Related to
Development of ADCON Products" and "-- Government Regulation."
 
     In addition, the Company is developing ADCON-T/N, a proprietary,
resorbable, carbohydrate polymer gel, which is designed to inhibit tendon and
peripheral nerve postsurgical scarring and adhesions, which may cause recurrent
pain and limited range of motion. In 1994, approximately 260,000 tendon and
peripheral nerve surgeries were performed in the U.S. The Company has initiated
a pivotal clinical trial for ADCON-T/N in the U.S. The pivotal trial is designed
to demonstrate that ADCON-T/N inhibits postsurgical scarring and adhesions
following carpal tunnel release, the surgical procedure to treat carpal tunnel
syndrome after the first surgery has failed.
 
                                       25
<PAGE>   27
 
   
     The Company is currently marketing ADCON-L and ADCON-T/N outside the U.S.
through independent medical device distributors in 29 countries, including the
major countries in the European Union. As a result of receiving approval from
the FDA, the Company has recently commenced marketing ADCON-L in the U.S.
through a network of independent manufacturers' agents with an aggregate sales
force of approximately 175 sales representatives who serve the orthopaedic and
neurosurgical markets. In addition, the Company signed a development and
exclusive license agreement in December 1996 with Chugai for the sale of ADCON-L
and ADCON-T/N in Japan. Chugai has filed applications requesting regulatory
approval to market ADCON-L and ADCON-T/N in Japan. The Company is also in the
early stages of development of several other ADCON products, including: ADCON-A,
for use in abdominal surgeries; ADCON-I for use in implant/prosthetic surgeries;
and ADCON-C for use in cardiac surgeries. In 1994, approximately 2.5 million
abdominal surgeries, approximately 1.4 million implant/prosthetic surgeries and
approximately 1.0 million cardiac surgeries were performed in the U.S.
    
 
     In addition to developing its ADCON family of products, the Company is
engaged in the discovery and development of therapeutic products for its
Cognition Modulation program and AD program. The Company is pursuing these
therapeutic programs by engaging in the research and development of small
molecule drug candidates for the treatment of several central nervous system
disorders. The Company's Cognition Modulation program is focused on a class of
compounds designed to act on the histamine H(3) receptor in the brain which
regulates sleep/wakeful states and modulates the level of arousal and alertness.
An antagonist to this receptor could lead to enhanced states of alertness and
may be used to treat obesity, narcolepsy, ADHD and the cognitive deficit in AD
patients. An agonist to the histamine H(3) receptor could reduce levels of
wakefulness and arousal, making such an agonist a candidate for use in the
treatment of anxiety and insomnia. The Company anticipates that it will identify
a lead compound as an antagonist to the histamine H(3) receptor in the second
half of 1998 and expects that it will begin human clinical trials with respect
to such compound in late 1998. See "Risk Factors -- Early Stage of Development
for Therapeutic Programs" and "-- Government Regulation."
 
     The Company is also engaged in the research and development of therapeutic
products for the treatment of AD. In October 1994, the Company entered into an
agreement with Janssen to collaborate on the research and development of
therapeutic products to treat AD. Pursuant to the Janssen Agreement, the Company
has developed a number of high throughput in vitro assay systems that have been
used to screen Janssen's pharmaceutical library and has identified several lead
compounds. The Company anticipates that lead compounds will be selected for
preclinical testing in late 1998. See "Risk Factors -- Early Stage of
Development for Therapeutic Programs," "-- The Janssen Agreement" and
"-- Government Regulation."
 
BUSINESS STRATEGY
 
     Gliatech's strategic objective is to utilize its core glial cell-derived
technology to: (i) develop and commercialize its family of ADCON site-specific
products and (ii) identify drug candidates and develop therapies for central
nervous system disorders, including ADHD and AD. The key elements of the
Company's business strategy include:
 
   
     Establishing ADCON-L as a Standard of Care for Lumbar Surgery.  The Company
seeks to establish ADCON-L as the standard of care for inhibiting scarring and
adhesions following lumbar surgery. Gliatech will seek to educate the surgical
community regarding ADCON-L's key advantages and benefits, which include a
reduction in scarring, a reduction in the incidence of pain associated with the
performance of activities of daily living and easier access to the surgical site
when reoperation is necessary. To date, ADCON-L has been used in approximately
12,000 surgeries without significant complications. On May 27, 1998, the Company
received a letter from the FDA approving the PMA for ADCON-L, which permits the
Company to market ADCON-L in the U.S. As a result, the Company has recently
commenced marketing ADCON-L in the U.S. through a network of independent
manufacturers' agents with an aggregate sales force of approximately 175 sales
representatives who serve the orthopaedic and neurosurgical markets. ADCON-L is
also being marketed in 29 countries outside the U.S. through independent medical
device distributors.
    
 
     Developing and Commercializing a Broad Range of ADCON Products.  Surgical
scarring is a significant medical problem often resulting in adhesions at the
surgical site, which may lead to significant complications,


                                       26
<PAGE>   28
 
such as pain, infertility, limited range of motion and impairment of
gastrointestinal function. Gliatech's ADCON proprietary, resorbable,
carbohydrate polymer technology is highly adaptable to meet the needs of many
different types of surgery through modification of its carbohydrate polymers and
their formulation into gels and solutions of variable viscosities and resorption
times. Each member of the ADCON family of products is being developed and
commercialized to address the site-specific problems of excessive postsurgical
scarring and adhesions. For example, in addition to ADCON-L and ADCON-T/N which
are carbohydrate polymer gels, Gliatech is developing ADCON-P, a low-viscosity
solution which can be administered directly through the surgical instrument used
in minimally invasive pelvic and gynecological procedures, thereby enabling its
use with minimal disruption of the surgical site and without enlargement of the
surgical opening. Gliatech's objective is to bring to market a family of
differentiated ADCON products for specific surgical procedures.
 
     Capitalizing on Surgeons' Recognition of ADCON Technology.  As a result of
the Company's sales of ADCON-L and ADCON-T/N outside the U.S. and the various
multi-center clinical trials conducted in the U.S. and Europe for ADCON-L,
ADCON-T/N and ADCON-P to date, an aggregate of approximately 1,000 neurologic,
orthopaedic, gynecologic and hand surgeons have used the appropriate ADCON
product in over 13,000 procedures. As a result, the Company believes that it has
developed and is expanding upon a reputation for providing high-quality, safe
and effective medical devices. The Company intends to use its reputation to
increase market acceptance of its existing products and to assist in introducing
new products currently under development. Initiatives to support product
marketing, enhance physician awareness and obtain support from key opinion
leaders include publishing results of clinical trials in peer reviewed surgeon
journals, providing packages of sales tools, videos, brochures and clinical
papers to its independent distributors, and exhibiting at major surgeons'
meetings, such as the American Association of Orthopaedic Surgeons and the
Federation of European Societies of Surgeries of the Hand.
 
     Utilizing its Core Glial Cell-Derived Technology for Treatment of Central
Nervous System Disorders.  To complement its near-term focus on its ADCON family
of products, the Company is pursuing the development of small molecule drug
candidates based on the Company's knowledge of glial cell function for the
treatment of central nervous system disorders. Through its Cognition Modulation
program, the Company has discovered and developed highly selective histamine
H(3) receptor antagonists which have been shown in in vivo studies to (i)
penetrate the blood-brain barrier after oral administration, (ii) selectively
block the histamine H(3) receptor in the brain, and (iii) modulate levels of
arousal and alertness. The Company is conducting preclinical studies on
compounds designed for use in the treatment of certain central nervous system
disorders, such as ADHD, obesity and narcolepsy. The Company has also discovered
and developed an agonist to the histamine H(3) receptor, which may be developed
for use in the treatment of anxiety and insomnia. In addition, the Company has a
collaborative agreement with Janssen relating to the research and development of
therapeutic products for use in the treatment of AD. The Company's research and
development activities have identified several potential lead compounds for each
of these programs.
 
     Pursuing and Expanding Strategic Alliances.  Gliatech's approach to
development and commercialization centers on selective retention of key
commercial rights complemented by partnership with third parties at appropriate
times. The Company has licensed marketing rights in Japan for ADCON-L and
ADCON-T/N to Chugai through an agreement under which Chugai is responsible for
obtaining applicable regulatory approval. For ADCON products other than ADCON-L,
Gliatech may seek a strategic marketing partner, possibly prior to seeking
regulatory approval, in order to facilitate product introduction and
commercialization. In the field of pharmaceutical development, Gliatech's
strategy is to seek development partners early in the development phase, as
exemplified by the collaboration with Janssen for the research and development
of a product for the treatment of AD.
 
GLIAL CELL-DERIVED TECHNOLOGIES
 
     The human central nervous system is composed of two interrelated networks
of cells, neurons and glial cells. Neurons transfer and process information from
within and around the body, enabling motor and sensory functions. Glial cells,
which outnumber neurons by approximately nine to one and are the major cellular
component of the brain, support, protect and repair the neurons and maintain the
environment necessary for
 
                                       27
<PAGE>   29
 
proper neuronal activity. Additionally, glial cells release biological mediators
which, among other processes, regulate the inflammatory and immune responses
within the brain.
 
     The Company's ADCON family of products and the Company's two therapeutic
programs, Cognition Modulation and AD, are based on the Company's research of
glial cells. The ADCON family of products is based on research relating to the
manner in which glial cells respond to scarring following damage to the central
nervous system. The Company identified glial cell-derived substances which act
as barriers to neuronal scarring. The Company utilized this technology to
develop carbohydrate polymers which mimic such actions. These carbohydrate
polymers are the basis for the Company's family of ADCON products. The Cognition
Modulation program is based on controlling the levels of the neurotransmitter,
histamine, within the brain. The Company has determined that the level of
histamine can be modulated by the neuronal histamine H(3) receptor, which
controls the release of histamine, and glial cells, which are responsible for
removal of histamine. The Company is conducting research to discover and develop
small molecule drug candidates which interact with these neuronal histamine H(3)
receptors to modulate the levels of histamine in the brain. For the AD program,
the Company identified that, in the AD-affected brain, glial cells release
pro-inflammatory molecules which can cause neuronal death. The Company is also
engaged in the discovery and development of small molecule drug candidates which
are designed to inhibit the release of these pro-inflammatory molecules. The
Company believes that research into the function of glial cells will continue to
provide opportunities for the discovery and development of additional products
and product candidates.
 
SURGICAL ADHESIONS AND THE GLIATECH SOLUTION
 
   
     As a result of the natural cellular processes of healing following surgery,
scarring and adhesions develop at the surgical site. Scarring and adhesions may
cause tissues, nerves and organs, which under normal conditions remain separate,
to bind and tether to each other and surrounding tissues. Scarring and adhesions
may occur following either open incision or minimally invasive surgery and may
lead to such postoperative complications as pain and impairment of function in
the performance of activities of daily living following lumbar surgeries,
infertility following pelvic surgeries, limited range of joint motion following
tendon surgeries, and more difficult access to the surgical site when
reoperation is necessary. Inhibition of postoperative scarring and adhesions is
a concern for surgeons. The preferred product to inhibit scarring and adhesions
would be (i) safe and effective in inhibiting scarring and adhesions, (ii)
resorbable so that a second surgery to remove the product would not be
necessary, (iii) adaptable to the particular surgical site and (iv) useable in
either open incision or minimally invasive surgeries. Additionally, such a
product would be used prophylactically because it is not possible to predict
prior to surgery which patients are likely to develop adhesion-related problems.
    
 
     The Company's ADCON family of proprietary, resorbable, carbohydrate polymer
gels and solutions possess the characteristics described above. ADCON products
are specifically designed as free-flowing resorbable gels and solutions of
varying viscosities and are designed for use at the appropriate surgical site.
For example, in both lumbar and tendon surgeries, the respective surgical sites
are small and ADCON-L and ADCON-T/N, which are formulated as free-flowing gels,
are designed to remain at the surgical site and coat both the surgical site and
the surrounding area. In contrast, in pelvic surgeries where the surgical site
is larger with many organs to coat, a less viscous product, such as ADCON-P, as
opposed to a film or gel, is needed to permit coating of the larger surgical
site. In addition, because ADCON-P is a solution, it is designed to be used in
both open incision and minimally invasive surgeries using a laparoscope. Because
scarring and adhesion formation typically occurs within a few weeks following
surgery, ADCON gels and solutions are designed to be present at the surgical
site during the time of scarring and adhesion formation and then to be gradually
and fully resorbed by the body. Further, ADCON-L and ADCON-T/N have been
demonstrated to be both safe and effective in multi-center European clinical
trials. Given their ease of use, and because it is not possible to predict prior
to surgery which patients are likely to develop adhesion-related problems, the
ADCON products are designed to be used prophylactically in all applicable
surgeries.
 
                                       28
<PAGE>   30
 
ADCON FAMILY OF PRODUCTS
 
     The following table summarizes the ADCON family of products, which are
designed to inhibit scarring and adhesions in applicable surgeries:
 
   
<TABLE>
<CAPTION>
                                                                        APPROXIMATE NUMBER OF
                                                                         SURGERIES PERFORMED
 PRODUCT       SURGICAL APPLICATION               STATUS(1)             ANNUALLY IN THE U.S.
- -------------------------------------------------------------------------------------------------
<S>          <C>                        <C>                             <C>                   <C>
 ADCON-L     Lumbar surgeries           Final approval to market in             450,000
                                        the U.S. received from the
                                        FDA in May 1998
 
                                        Marketed in 30 countries,
                                        including the U.S.
 
 ADCON-P     Pelvic/gynecological       U.S. pilot clinical trials            1,300,000
             surgeries                  underway
 
 ADCON-T/N   Tendon and peripheral      U.S. pivotal clinical trials            260,000
             nerve surgeries of the     underway
             hand
 
                                        Marketed in 29 countries
                                        outside the U.S.
 
 ADCON-A     Abdominal surgeries        Preclinical research                  2,500,000
 
 ADCON-I     Implant/prosthetic         Preclinical research                  1,400,000
             surgeries
 
 ADCON-C     Cardiac surgeries          Preclinical research                  1,000,000
</TABLE>
    
 
- ------------------
 
 (1) "Preclinical" refers to activities involving testing of defined lead
     product candidates in animals prior to Investigational Device Exemption
     ("IDE") application with the FDA or similar regulatory approvals with
     non-U.S. agencies. "Pilot clinical trial" refers to human clinical testing
     of product functionality. "Pivotal clinical trial" refers to human
     clinical testing of safety and effectiveness. The results of the pivotal
     trials, if successful, may be adequate to allow the Company to file for
     regulatory approval of a product candidate in the U.S. or make similar
     filings for regulatory approvals with non-U.S. agencies. See
     "-- Government Regulation."
 
  ADCON-L
 
   
     ADCON-L is a proprietary, resorbable, carbohydrate polymer gel which is
applied directly to the surgical site during lumbar surgery. ADCON-L is designed
to provide a barrier between the membranes covering the spinal cord and the back
muscles, and between the spinal nerve roots and the inner surface of the
vertebral body. This barrier inhibits excess scarring and adhesions at the
surgical site. Because it is not possible to predict prior to surgery which
patients are likely to develop adhesion-related problems, ADCON-L is designed to
be used prophylactically in all patients undergoing lumbar surgeries. To date,
ADCON-L has been used in approximately 12,000 surgeries.
    
 
   
     In 1995, approximately 450,000 lumbar surgeries were performed in the U.S.
Patients undergoing any lumbar surgeries often require additional medical
treatment which may include physical therapy, pain medication and, in certain
cases, reoperation to remove adhesions. The majority of lumbar surgeries are
performed to remove herniated lumbar spinal discs while others are performed to
decompress the spinal cord and nerve roots. The Company's European clinical
trial has shown that 8% to 44% of patients who received ADCON-L experienced a
lower incidence of activity-related pain in the performance of all evaluated
activities of daily living. The Company is not aware of any competitive products
that are being developed or marketed to inhibit scarring and adhesions following
lumbar surgery.
    
 
     Clinical Results.  To date, the Company has conducted clinical trials in
the U.S. and in Europe. The Company's European pivotal, double-blind,
controlled, clinical trial of ADCON-L was designed to test its safety and
effectiveness in inhibiting excessive scarring and adhesions, as well as
associated pain and other symptoms,
 
                                       29
<PAGE>   31
 
following lumbar disc surgery. The clinical trial was conducted at nine academic
neurosurgical centers in Switzerland, The Netherlands and Belgium and enrolled
298 patients. The parameters used to evaluate patients at one, three and six
months following surgery were: (i) recurrence of postoperative pain, (ii) pain
associated with the performance of activities of daily living, such as lifting
objects, riding in or driving a car and sitting; (iii) sensory and motor
function and (iv) safety. At six months following surgery, patients were also
evaluated as to the amount of extensive scarring as assessed by Magnetic
Resonance Imaging and as to the association between scarring and the recurrence
of postoperative pain.
 
     The results of this clinical trial indicated that the use of ADCON-L
resulted in a statistically significant reduction in the incidence of extensive
scarring, and that there is a statistically significant correlation between the
presence of scarring and the recurrence of postoperative pain. In addition, this
trial revealed a statistically significant reduction in the incidence of
activity-related pain associated with the performance of all evaluated
activities of daily living in ADCON-L treated patients, as compared to control
patients. The reduction of scarring in patients treated with ADCON-L was also
observed by surgeons who performed second surgical procedures necessitated by
reherniation of the disc. The Company also conducted a post-study surveillance
that evaluated these same patients at approximately 12 months after surgery. The
results of such surveillance supported the conclusion of the pivotal clinical
study that ADCON-L reduced scarring.
 
   
     The Company also is conducting a double-blind, controlled clinical trial of
ADCON-L in the U.S. at 16 centers. The Company has enrolled 371 patients in this
trial. Interim results on 165 patients indicated that ADCON-L reduced scarring
at six months. The Company is currently collecting data for these and other
patients enrolled in the trial. The Company expects to complete the analysis of
data from this trial by the end of 1998. There can be no assurance that the
results of the completed analysis will be consistent with the interim results of
such trial or the results of the European trial. See "Risk Factors -- Early
Commercialization; Uncertainty of Market Acceptance of ADCON Family of
Products," and "-- Uncertainty Related to Development of ADCON Products."
    
 
     Development and Regulatory Status.  In August 1995, the Company obtained
regulatory clearances to affix CE Marking for ADCON-L. The CE Marking for
ADCON-L allows the Company to market ADCON-L for lumbar surgery patients in 19
countries, which include (i) the European Union countries (Austria, Belgium,
Denmark, Finland, France, Germany, Greece, Ireland, Italy, Luxembourg, The
Netherlands, Portugal, Spain, Sweden and the United Kingdom); (ii) Switzerland
and (iii) the three European Economic Area countries (Iceland, Liechtenstein and
Norway). The Company has also satisfied all the necessary regulatory
requirements to market ADCON-L in Argentina, Australia, Canada and Israel and is
also able to market ADCON-L in New Zealand and the Republic of South Africa.
 
   
     On May 27, 1998, the Company received a letter from the FDA approving the
PMA for ADCON-L, which permits the Company to market ADCON-L in the U.S. The
labeling for ADCON-L in the U.S. indicates that based on the Company's six-month
European clinical trial, patients treated with ADCON-L had a statistically
significant reduction of scarring and of activity-related pain at six months and
that with regard to adverse safety events, the European trial showed no
statistically significant difference between the ADCON-L and control group. In
addition, such labeling indicates that based on the 12-month post-study
surveillance of the European clinical trial of available patients, patients
treated with ADCON-L had a statistically significant reduction of scarring at 12
months, but there was no statistically significant difference between patients
treated with ADCON-L and the control group for activity-related pain at 12
months. The European clinical trial had a six-month end-point. The labeling also
reflects interim six-month results from the U.S. clinical trial, which showed
that ADCON-L patients had a statistically significant reduction in scarring and
adhesions and a lower incidence of pain while performing certain daily living
activities. Upon completion of the U.S. clinical trial, final results of such
trial will be submitted to the FDA and included in the labeling for ADCON-L.
There can be no assurance that the results of the completed analysis will be
consistent with the interim results of such trial or the results of the European
trial. See "Risk Factors -- Early Commercialization; Uncertainty of Market
Acceptance of ADCON Family of Products," "-- Reliance on Third Party for
Manufacturing; Comprehensive Regulation of Manufacturing of Products" and
"-- Government Regulation."
    
 
                                       30
<PAGE>   32
 
   
     Marketing and Sales.  The Company currently markets ADCON-L in 29 countries
outside the U.S. through independent medical device distributors. The Company
has entered into distribution agreements for the sale of ADCON-L in certain
countries, including Argentina, Australia, Austria, Belgium, Canada, Denmark,
Egypt, Finland, France, Germany, Greece, Iceland, Italy, Korea, Luxemburg,
Mexico, The Netherlands, New Zealand, Norway, Portugal, the Republic of South
Africa, Slovakia, Spain, Sweden, Switzerland and the United Kingdom
(collectively, the "Distributing Countries"). As a result of receiving approval
from the FDA, the Company has recently commenced marketing ADCON-L in the U.S.
through a network of independent manufacturers' agents with an aggregate sales
force of approximately 175 sales representatives who serve the orthopaedic and
neurosurgical markets. The sales representatives of these organizations will be
trained and managed by the sales personnel of the Company. In the U.S., the
Company establishes the price of its products for sale to hospitals and the
independent manufacturers' agents are reimbursed on a commissioned basis.
    
 
     In order to support its distribution network, the Company provides ongoing
technical and marketing support through its Area Sales Managers, Marketing and
Medical departments. In 1997, the Company provided initial product training for
all distributor representatives and subsequent field training for individual
sales representatives. The Company also participated in 12 surgeons' meetings in
1997 relating to ADCON-L and provided support for distributors at key meetings
with various surgeons in the distributor's territory. In addition, distributors
were provided with a package of sales tools, videos, brochures and clinical
papers supporting the introduction and use of ADCON-L. During 1997, the Company
exhibited at several major surgeons' meetings which were attended by orthopaedic
and neurosurgeons whose practices involve spinal surgery, including the American
Association of Orthopaedic Surgeons, the American Association of Neurological
Surgeons, the North American Spine Society and the International Congress of
Neurosurgery.
 
  ADCON-P
 
   
     ADCON-P is a proprietary, resorbable, carbohydrate polymer solution which
is applied directly into the pelvic cavity during pelvic and gynecologic
surgeries, such as reoperations to remove adhesions and uterine tumor surgeries.
ADCON-P is designed to provide a barrier to inhibit scarring and adhesions which
may bind the uterus, fallopian tubes or ovaries to the surrounding pelvic
cavity.
    
 
     In 1994, approximately 1.3 million gynecological surgeries were performed
in the U.S. Independent studies have shown that more than 55% of patients
undergoing such surgeries experience some scarring and adhesions following
pelvic and gynecological surgeries. Such postsurgical scarring and adhesions may
form on the ovaries, fallopian tubes and uterus thereby causing infertility or
difficulty in conceiving. In preclinical studies conducted by the Company, it
was demonstrated that ADCON-P: (i) significantly inhibited the incidence and
extent of uterine adhesions, (ii) was resorbable and (iii) was safe. ADCON-P is
designed for use in both open incision surgeries and minimally invasive
surgeries using a laparoscope. Two existing competitive products used in pelvic
surgeries are both "films" and as a result may not be used in minimally invasive
surgeries. In addition, ADCON-P can be applied directly to the surgical site,
which minimizes the handling of the product during surgery. See
"-- Competition."
 
     Development and Regulatory Status.  The Company has initiated a
double-blind, controlled clinical trial and has completed enrollment of 41
patients; 23 patients for evaluation in reoperations to remove adhesions and 18
patients for evaluation in uterine tumor surgeries. This trial evaluates
patients between one to three months after surgery to assess the incidence and
extent of postsurgical scarring and adhesions. Upon completion of the pilot
trial, which is currently anticipated to occur in the second half of 1998, the
Company intends to submit a request to the FDA to conduct a pivotal clinical
trial for ADCON-P. See "Risk Factors -- Early Commercialization; Uncertainty of
Market Acceptance of ADCON Family of Products," and "-- Uncertainty Related to
Development of ADCON Products."
 
     Marketing and Sales.  To date, the Company has funded the development of
ADCON-P independently of strategic partners and retains all worldwide commercial
rights to ADCON-P. Due to the relatively large number of pelvic and
gynecological procedures performed and the large number of surgeons performing
such surgeries, the Company may seek to enter into agreements with strategic
partners for commercialization of ADCON-P, and as a result may relinquish
certain rights to ADCON-P to such strategic partners. No assurances can be given
that
                                       31
<PAGE>   33
 
the Company will be able to enter into such a strategic partnership or that in
the event the Company does enter into such a strategic partnership that such
partnership will be successful. See "Risk Factors -- Reliance on Third Party for
Manufacturing; Comprehensive Regulation of Manufacturing of Products,"
" -- Dependence on Strategic Alliances," and "Management's Discussion and
Analysis of Financial Condition and Results of Operations -- Liquidity and
Capital Resources."
 
  ADCON-T/N
 
   
     ADCON-T/N is a proprietary, resorbable, carbohydrate polymer gel which is
applied directly to the surgical site following tendon and peripheral nerve
surgeries such as primary tendon repair and reoperations to remove adhesions on
tendons or peripheral nerves. ADCON-T/N is designed to act as a barrier between
the peripheral nerve and the surrounding tissue.
    
 
     In 1994, approximately 260,000 tendon and peripheral nerve surgeries were
performed in the U.S. The formation of adhesions may bind the tendon to
surrounding tissues, which results in a reduction of the tendon's ability to
glide, thus limiting the range of motion of the affected joint. In the
peripheral nervous system, adhesions may tether nerves to surrounding tissues
and may cause compression of nerves, which results in pain or numbness due to
loss of nerve function in the hand.
 
     Clinical Results.  In November 1995, the Company completed open label
clinical trials involving approximately 68 patients in France and Switzerland to
evaluate the use of ADCON-T/N in inhibiting postsurgical scarring and adhesions
following various surgical procedures involving tendons and nerves. These trials
evaluated range of motion as well as safety. The results of these trials showed
that ADCON-T/N was safe and enabled improved range of motion of the affected
joint.
 
     Development and Regulatory Status.  In January 1996, the Company obtained
regulatory clearances to affix CE Marking for ADCON-T/N. The CE Marking allows
the Company to market ADCON-T/N for use in tendon and peripheral nerve surgeries
in the 19 European countries that recognize CE Marking. The Company has also
obtained all the necessary regulatory requirements to market ADCON-T/N in the
same countries it markets ADCON-L. See "-- Government Regulation." In February
1995, the Company received approval to conduct a U.S. pilot clinical trial for
ADCON-T/N. The Company is conducting a multi-center, double-blind, controlled
clinical trial to test the safety and effectiveness of ADCON-T/N in inhibiting
excessive scarring and adhesions following peripheral nerve surgery of the hand.
The study has commenced at 14 clinical centers and will enroll up to 230
patients. To date, the Company has enrolled approximately one-third of the
patients necessary to conduct this trial. Because the trial is directed toward a
specific patient population and because most of such surgeries are performed at
local or regional hospitals, thereby dispersing the patient population, the
Company has experienced delays in completing enrollment. The Company has taken
certain measures to enhance enrollment of this trial. Further delays in
completing enrollment, however, may delay the regulatory approval process of
ADCON-T/N in the U.S. There can be no assurance, however, as to the timing of
completion of such trial, or, upon such completion, the regulatory approval, if
at all, in the U.S. See "Risk Factors -- Early Commercialization; Uncertainty of
Market Acceptance of ADCON Family of Products" and "-- Uncertainty Related to
Development of ADCON Products."
 
     Marketing and Sales.  The Company is currently marketing ADCON-T/N in the
29 Distributing Countries. The Company provides ongoing technical and marketing
support through its Area Sales Managers, Marketing and Medical departments. In
1997, the Company provided initial product training for all distributor
representatives and subsequent field training for individual sales
representatives. The Company also participated in eight surgeons' meetings
relating to ADCON-T/N in 1997 and provided support for distributors at key
meetings with various surgeons in the distributor's territory. In addition,
distributors were provided with a package of sales tools, videos, brochures and
clinical papers supporting the introduction and use of ADCON-T/N. During 1997,
the Company exhibited at several major surgeons meetings, including American
Society for Surgery of the Hand and Federation of European Societies of
Surgeries of the Hand.
 
     To date, the Company has funded the development of ADCON-T/N independently
of strategic partners and retains all worldwide commercial rights to ADCON-T/N,
except in Japan with respect to Chugai. The Company
 
                                       32
<PAGE>   34
 
is exploring marketing alternatives for ADCON-T/N and may continue marketing
through independent distributors or the Company may enter into agreements with
strategic partners for ADCON-T/N, and as a result may relinquish certain rights
to ADCON-T/N to such strategic partners. No assurances can be given that the
Company will enter into such a strategic partnership or that in the event the
Company does enter into such a strategic partnership that such partnership will
be successful. See "Risk Factors -- Reliance on Third Party for Manufacturing;
Comprehensive Regulation of Manufacturing of Products," " -- Dependence on
Strategic Alliances," and "Management's Discussion and Analysis of Financial
Condition and Results of Operations -- Liquidity and Capital Resources."
 
  Other ADCON Products
 
     The Company is also currently conducting preclinical studies relating to
applications of its ADCON technology in other propriety, resorbable,
carbohydrate polymer medical devices designed to inhibit scarring and adhesions
in certain additional surgical procedures. Due to the differences in the body
environments in which each of the products would be used, each of the Company's
ADCON products is being designed to be adapted for use at the specific surgical
site. Examples of other types of surgery where adhesions are common and are
known to create troublesome postsurgical complications include (i) abdominal
surgery, where peritoneal adhesions between organs and/or the abdominal wall may
seriously impair gastrointestinal function; (ii) implant/prosthetic surgery,
where adhesions may compromise the effective performance of the implanted
medical device; and (iii) cardiac surgery, where adhesions may significantly
increase the risk of injury during reoperation. The Company is developing
ADCON-A for use in abdominal surgery, ADCON-I for use in implant/prosthetic
surgery, and ADCON-C for use in cardiac surgery. In 1994, approximately 2.5
million abdominal surgeries, approximately 1.4 million implant/prosthetic
surgeries and approximately 1.0 million cardiac surgeries were performed in the
U.S. The Company currently intends to formulate its ADCON family of products as
solutions and gels, which will permit their use in both open incision and
minimally invasive surgeries. In contrast, the presently developed and marketed
film products cannot be used in minimally invasive surgeries. Additionally, the
ADCON gels and solutions are applied directly to the surgical site, which
minimizes the handling of the products during surgery. See "-- Competition." The
Company may seek one or more strategic partners to collaborate on the
development and commercialization of these additional ADCON products. See "Risk
Factors -- Early Commercialization; Uncertainty of Market Acceptance of ADCON
Family of Products," and "-- Uncertainty Related to Development of ADCON
Products."
 
NEUROLOGIC DRUG DEVELOPMENT PROGRAMS
 
     The Company is engaged in the discovery and development of therapeutic
products for use in the treatment of certain central nervous system disorders
for which the Company believes existing therapies are inadequate. The Company is
focusing its therapeutic research and development efforts on the discovery and
development of small molecules for the treatment of ADHD, sleep disorders,
obesity, anxiety and AD. The Company's AD research and development efforts are
being pursued through its strategic alliance with Janssen. See "-- The Janssen
Agreement."
 
  Cognition Modulation Program
 
     The Company is conducting research to discover and develop a class of small
molecules designed to act on the histamine H(3) receptor in the brain. Histamine
is a chemical messenger released from certain neurons in the brain which
regulates sleep/wake states and modulates levels of arousal and alertness in the
conscious state. The histamine H(3) receptor is predominantly found in the brain
and regulates the synthesis and release of histamine in the brain. An antagonist
to this receptor would lead to enhanced states of arousal and alertness. The
histamine H(3) receptor antagonists may be useful in treating disorders in which
central nervous system arousal is desirable, such as ADHD or narcolepsy. An
agonist to the receptor may prove useful in treating disorders in which
suppression of the central nervous system is desirable, such as anxiety and
insomnia.
 
     Histamine H(3) Receptor Antagonists.  The Company believes histamine H(3)
receptor antagonists could provide a therapeutic approach for enhancing
cognition and positive behavior in patients with disorders
 
                                       33
<PAGE>   35
 
characterized by memory and learning deficiencies such as AD and ADHD. Such an
agent could also be useful in arousing patients with various forms of depressed
activity of the central nervous system, such as narcolepsy. In addition, the
compounds may be used in the treatment of obesity. The Company has discovered
and developed highly selective histamine H(3) receptor antagonists, which have
been shown in in vivo studies to (i) penetrate the blood-brain barrier after
oral administration, (ii) selectively block the histamine H(3) receptor in the
brain and (iii) modulate levels of arousal and alertness. The Company has
demonstrated in preclinical studies that the histamine H(3) antagonists improve
learning and memory and have potential advantages in both safety and abuse
potential and have a prolonged duration of action. The Company anticipates that
a lead compound for its H(3) antagonist will be identified in the second half of
1998 and that it will begin human clinical trials with respect to such compound
in late 1998. See "Risk Factors -- Early Stage of Development for Therapeutic
Programs" and "-- Government Regulation."
 
     While there are currently available products for the treatment of the
conditions mentioned above, the Company is not aware of any such products based
on the histamine H(3) receptor antagonists. The histamine H(3) receptor is a
member of a family of histamine receptors which has been demonstrated to have
significant pharmaceutical uses and has proven to be useful in developing drug
candidates. For example, antagonists to the histamine H(1) receptor are used as
"antihistamines" for treating symptoms of the common cold, and include products
such as Benadryl and Claritin, and antagonists to the histamine H(2) receptor
are used as anti-ulcer agents, and include products such as Tagamet and Zantac.
The Company has obtained a U.S. patent and filed several additional patent
applications covering the histamine H(3) receptor antagonists currently being
developed by the Company. See "Risk Factors -- Patents, Licenses and Proprietary
Rights" and "-- Patents, Trademarks and Trade Secrets."
 
     Histamine H(3) Receptor Agonists.  The Company has also begun research and
development of histamine H(3) receptor agonists to reduce levels of wakefulness
and arousal for use in the treatment of anxiety and insomnia. To date, the
Company has developed several compounds which have high affinity for the
histamine H(3) receptor and in animal models have been shown to penetrate the
blood-brain barrier and occupy histamine H(3) receptors. The Company continues
to synthesize and screen new compounds as potential selective agonists of the
histamine H(3) receptor.
 
   
     To date, the Company has pursued the development of its Cognition
Modulation technology independently of strategic partners and retains all of the
worldwide commercial rights to all of the products it may develop. In the
future, the Company may seek one or more strategic partners for the development
of its Cognition Modulation technology. No assurances can be given that the
Company will be able to enter into such a strategic alliance or partnership, or
that in the event the Company does enter into such a strategic alliance or
partnership, that such alliance or partnership will be successful. See "Risk
Factors -- Dependence on Strategic Alliances."
    
 
  Alzheimer's Disease Program
 
     AD is characterized by progressive dementia due to degeneration and death
of neuronal cells. The cause of AD is unknown, and there are no proven means of
prevention or cure. Research in AD has been directed primarily at providing
replacement therapy for neurotransmitter deficiencies in order to alleviate the
symptoms and has focused on the role of beta-amyloid, which is the major
component of the brain deposits called senile plaques that accumulate in the
brain of a patient with AD. The Company has demonstrated that the presence of
beta-amyloid plaques results in the release of pro-inflammatory molecules which
can result in neuronal death. The Company believes glial cells play a causative
role in neuronal death associated with AD. The Company is developing small
molecular weight compounds to block the release of these pro-inflammatory
molecules.
 
     The Company is engaged in two programs for the discovery and development of
compounds to inhibit these unwanted glial cell associated events. These two
programs, which the Company is pursuing through its strategic alliance with
Janssen, are as follows:
 
     Inhibitors of Beta-Amyloid Induced Inflammation.  The Company has
discovered that the presence of beta-amyloid plaques results in a specific
metabolic response in glial cells, including the release of pro-inflammatory
molecules, which has been reported to occur in the brain of patients with AD.
These pro-inflammatory molecules
 
                                       34
<PAGE>   36
 
are believed to cause neuronal death. The Company is working with Janssen on the
development of compounds that would block the affects of beta-amyloid plaques on
glial cells and thus block or reduce the release of inflammatory agents, thereby
reducing the incidence of neuronal death. The Company has developed a number of
high throughput in vitro assay systems that have been used to screen Janssen's
pharmaceutical library for inhibitors of these beta-amyloid-induced actions. As
a result of the Company's efforts, several potential lead compounds that block
or reduce the release of inflammatory agents have been identified.
 
     Inhibitors of Complement Activation.  The Company is also pursuing research
relating to activated proteins of an immune response system known as the
"complement cascade." Activated complement proteins are associated with
beta-amyloid in AD senile plaques. The complement cascade is part of the immune
response typically invoked to fight systemic infections, resulting in the death
of pathogenic cells, but is not usually found in the brain. The Company has
discovered that beta-amyloid can bind one of the complement proteins and
activate the entire complement cascade, providing an explanation for the
presence of activated complement proteins in patients with AD. The activation of
the complement cascade may result in neuronal death. The Company is working with
Janssen on the development of compounds that would block the complement
activation. The Company has developed a number of high throughput in vitro assay
systems that have been used to screen Janssen's pharmaceutical library for
inhibitors of beta-amyloid induced activation of the complement cascade. As a
result of the Company's efforts, several potential lead compounds that block
beta-amyloid induced activation of the complement cascade have been identified.
 
     Development Status.  Janssen is currently utilizing chemistry to advance
the development of the lead compounds identified for both the beta-amyloid
induced inflammatory molecule and the inhibitors of complement activation
programs. In addition, Janssen is funding the development by the Company of in
vivo animal models to further evaluate the efficacy of selected potential lead
compounds for each of these programs. A joint committee consisting of members of
management of the Company and Janssen will evaluate each of the lead compounds
identified for the inhibitors of beta-amyloid induced inflammation and
inhibitors of complement activation. This committee will identify compounds for
further preclinical studies and development, including clinical studies. The
Company anticipates that a lead compound will be identified for preclinical
testing in late 1998. See "Risk Factors -- Early Stage of Development for
Therapeutic Programs."
 
     The Janssen Agreement. In October 1994, under the terms of the Janssen
Agreement, Johnson & Johnson Development Corporation, a subsidiary of Johnson &
Johnson, made an equity investment in the Company and Janssen, a wholly-owned
subsidiary of Johnson & Johnson, paid the Company an initial licensing fee. The
initial Janssen Agreement provided funding by Janssen to the Company for AD
research through October 1997. In September 1995, the Company entered into an
addendum to the Janssen Agreement in order to expand the scope of the
collaboration on AD to include research relating to inhibitors of complement
activation. In October 1997, Janssen exercised its option to extend the Janssen
Agreement for a period of one year through October 1998 and has retained the
right to extend it for an additional period of one year. The Janssen Agreement
provides for total funding and milestone payments of up to approximately $30.0
million. As of March 31, 1998, the Company has received approximately $9.7
million in revenues under the Janssen Agreement. Janssen is required to make
additional payments to the Company upon the attainment of certain clinical and
developmental milestones. Janssen is also responsible for all development costs,
including the cost associated with clinical trials and obtaining regulatory
approval. Technology developed pursuant to the Janssen Agreement will be the
property of Janssen. Janssen's parent, Johnson & Johnson, has worldwide
distribution rights for all products developed as a result of this
collaboration. The Company will receive a royalty from Janssen on any sales of
such products. There can be no assurance that development of the AD program will
be successfully completed or that Janssen or Johnson & Johnson will be able to
successfully commercialize the products developed as part of any collaborative
efforts pursuant to the Janssen Agreement. See "Management's Discussion and
Analysis of Financial Condition and Results of Operations" and Note I to
Consolidated Financial Statements.
 
MARKETING AND SALES
 
     The Company is marketing its ADCON products outside the U.S. through
independent medical device distributors. The Company has entered into agreements
with independent distributors regarding country specific
 
                                       35
<PAGE>   37
 
sales and distribution rights for ADCON-L and ADCON-T/N in the 29 Distributing
Countries. The distributors in Europe are managed by the Company's European
sales organization, which consists of four Area Sales Managers, located in The
Netherlands, Germany, France and Italy. The non-European distributors are
managed by an international sales manager located at the Company's executive
offices in Cleveland, Ohio. In addition, the Company signed a development and
exclusive license agreement in December 1996 with Chugai for the exclusive sale
of ADCON-L and ADCON-T/N in Japan. Chugai has filed applications requesting
regulatory approval to market ADCON-L and ADCON-T/N in Japan. Unless terminated
earlier by either the Company or Chugai, the agreement with Chugai shall remain
in effect until the date on which the last Japanese patent issued in connection
with the agreement expires.
 
     These distributor agreements provide the distributors with exclusive
distribution rights in their assigned territory. The agreements require the
distributors to meet specified minimum annual purchase targets and to provide
the Company with periodic reports on their sales to hospitals. In the event such
targets are not achieved, the Company may, upon the expiration of applicable
notice periods, terminate the exclusivity of such arrangement. The Company
currently establishes the price of its products for sale to distributors and
each distributor then sets the price, including any discounts at which the
product is sold to the hospital. The Company's distributors are independent
third parties, are not employees of the Company and are not under the direct
control or supervision of the Company, except that they are subject to the terms
and conditions of their respective distribution agreements. See "Risk
Factors -- Dependence on Independent Distributors; No Direct Sales Force."
 
   
     As a result of receiving approval from the FDA, the Company has recently
commenced marketing ADCON-L in the U.S. through a network of independent
manufacturers' agents with an aggregate sales force of approximately 175 sales
representatives who serve the orthopaedic and neurosurgical markets. The sales
representatives of these organizations are trained and managed by the sales
personnel of the Company. These manufacturers' agents agreements provide the
agents with exclusive distribution rights in their assigned territory. The
agreements require the agents to meet certain sales targets. In the event such
targets are not achieved, the Company may, upon the expiration of applicable
notice periods, terminate the exclusivity of such arrangement. In the U.S., the
Company establishes the price of its products for sale to hospitals and the
independent manufacturers' agents are reimbursed on a commissioned basis.
    
 
MANUFACTURING AND SUPPLIERS
 
     The Company does not have any manufacturing facilities and presently
utilizes a sole third-party manufacturer, EMCM, located in Nijmegen, The
Netherlands, for the manufacture of its commercial and clinical requirements of
ADCON-L, ADCON-P and ADCON-T/N. The Company believes that the manufacturer has
the ability to supply sufficient products to satisfy the Company's existing and
future requirements for the development and commercialization of its ADCON
products. The Company maintains an inventory of its products in warehouses
located in the U.S. and The Netherlands. The Company currently purchases the key
components for ADCON-L, ADCON-P and ADCON-T/N from suppliers and provides such
components to the contract manufacturer who formulates these components into
ADCON-L, ADCON-P and ADCON-T/N. The contract manufacturer is registered as a
subcontractor for the manufacture of pharmaceutical products by The Netherlands
designated agency and is certified to ISO requirements for manufacture of such
products. ISO Certification is an internationally recognized standard of quality
manufacturing. The Company intends to identify additional manufacturers in the
future, including a U.S.-based contract manufacturer. The manufacture of the
Company's products is subject to QSR or other requirements prescribed by the
appropriate regulatory agency in the country of use. There can be no assurance
that the Company's current manufacturer will continue to comply with all
applicable regulatory requirements or that such manufacturer will be able to
supply the Company with such products or that the Company will be able to
identify additional manufacturers of its products on terms acceptable to the
Company. See "Risk Factors -- Reliance on Third Parties for Manufacturing;
Comprehensive Regulation of Manufacturing of Products" and "-- Reliance on a
Single Source Supplier."
 
     The Company currently obtains one of the key components for its ADCON
products from a single supplier. The Company also has developed its own
proprietary process to manufacture this key component and is currently
manufacturing it on a pilot basis through a contract manufacturer according to
QSR requirements. The Company
                                       36
<PAGE>   38
 
intends to have this proprietary process qualified under applicable regulatory
requirements in the first half of 1999 in order to have an alternate source of
supply. In addition, the Company is pursuing qualification of additional
suppliers. There can be no assurance that the Company will be successful in
developing such a proprietary process or that such proprietary process will be
qualified or alternative sources will be located or that the current supply of
raw materials will continue to be provided on terms and conditions acceptable to
the Company, if at all. See "Risk Factors -- Reliance on Third Party for
Manufacturing; Comprehensive Regulation of Manufacturing of Products."
 
COMPETITION
 
     There is substantial competition in the medical device and pharmaceutical
industries, both from specialized firms and from major pharmaceutical, chemical,
medical device and surgical supply companies. Furthermore, academic
institutions, governmental agencies, and other public and private research
organizations also continue to conduct research, seek patent protection, and
establish collaborative arrangements with commercial entities for product
development and marketing. Products resulting from these activities may compete
directly with any products developed by the Company. These companies and
institutions also compete with the Company in recruiting and retaining highly
qualified scientific personnel.
 
   
     Although the Company is not aware of any products on the market that would
directly compete with ADCON-L or ADCON-T/N, there are products on the market
which would compete with ADCON-P. These products include Interceed, a film
comprised of oxidized regenerated cellulose which has been marketed for several
years by Johnson & Johnson to prevent surgical adhesions following pelvic
surgeries, and Seprafilm, a film comprised of sodium hyaluronic acid and
carboxymethyl cellulose which is marketed by Genzyme Corporation to inhibit
surgical adhesions following both pelvic and abdominal surgeries. There are
significant efforts by others, including many large pharmaceutical companies and
academic institutions, to develop products which may compete with products that
are developed by the Company relating to its ADCON family of products, the
Cognition Modulation program and the AD program. Some of these products may be
at a more advanced stage of development than the Company's products. In
addition, there may be substantial competition in the biopharmaceutical and
medical industries, both from specialized firms and from major pharmaceutical,
chemical, medical device and surgical supply companies. Many of the Company's
potential competitors have product development capabilities and financial and
human resources greater than the Company, and have manufacturing, marketing,
sales and distribution capabilities that the Company does not have. Universities
and other research institutions may develop similar technologies and processes
which, in some instances, may be utilized by others to compete with the
Company's products.
    
 
     The Company expects to encounter significant competition for each of its
product candidates. To compete successfully, the Company will be required to
develop and maintain scientifically advanced technology, develop proprietary
products, attract and retain highly qualified personnel, obtain patent or other
protection for its products, obtain required regulatory approvals and
manufacture and successfully market its products, either alone or through
collaboration with third parties. See "Risk Factors -- Technological Change" and
"-- Dependence on Key Management and Qualified Personnel."
 
GOVERNMENT REGULATION
 
     The manufacture and sale of the Company's products are subject to
regulation by numerous authorities, principally the FDA, and corresponding state
and foreign authorities. The regulatory process is lengthy, expensive and
uncertain. Prior to commercial sale in the United States, most medical devices
and new drugs, including the Company's products under development, must be
cleared or approved by the FDA. In addition, certain material changes or
modifications to medical devices and drugs also are subject to FDA review and
approval. Securing the FDA clearances and approvals may require the submission
of extensive clinical data and supporting information to the FDA. Product
clearances and approvals can be withdrawn for failure to comply with regulatory
standards or the occurrence of unforeseen problems following initial marketing.
The FDA and other agency requirements for manufacturing, product testing, and
marketing also can vary depending upon whether the product is a medical device
or drug. Failure to comply with applicable FDA regulatory requirements could
result in sanctions being imposed on the Company or the manufacturer of its
products, including warning letters, fines, injunctions, civil
                                       37
<PAGE>   39
 
penalties, failure of the FDA to grant premarket clearance or premarket approval
of medical devices and drugs, operating restrictions and criminal prosecution.
Sales of the Company's products outside of the United States are subject to
foreign regulatory requirements that may vary widely from country to country.
The time required to obtain clearance from a foreign country may be longer or
shorter than that required by the FDA or other such agencies, and clearance or
approval or other product requirements may differ. There can be no assurance
that the Company will be able to obtain necessary regulatory clearances or
approvals on a timely basis, if at all, for any of its products under
development, and delays in receipt or failure to receive such clearances or
approvals, the loss of previously received clearances or approvals or failure to
comply with existing or future regulatory requirements could have a material
adverse effect on the Company's business, financial condition and results of
operations.
 
   
     There is no certainty that the clinical studies involving ADCON-T/N and
ADCON-P will be completed in a timely manner or that the data and information
obtained will be sufficient to support the filing of a premarket approval
application. There can be no assurance that the Company will be able to obtain
necessary approvals to market ADCON-T/N or ADCON-P or any other products under
development on a timely basis, if at all, and delays in receipt or failure to
receive such approvals, the loss of previously received approvals, or failure to
comply with existing or future regulatory requirements could have a material
adverse effect on the Company's business, financial condition and results of
operations.
    
 
     Any products manufactured or distributed pursuant to clearance of a
premarket notification submission or an approved premarket approval application
are subject to pervasive and continuing regulation by the FDA, including record
keeping requirements and reporting of adverse experience with the use of the
device. The Federal Food, Drug and Cosmetic Act ("FDC Act") requires that
medical devices be manufactured in registered establishments and in accordance
with the QSR requirements for medical devices. Such manufacturing facilities are
subject to periodic inspections by the FDA.
 
     Regulation of Medical Devices -- United States.  The FDC Act requires
premarket clearance or premarket approval by the FDA prior to commercialization
of medical devices. Pursuant to the FDC Act, the FDA regulates the manufacture,
distribution and production of medical devices in the United States. Medical
devices are classified into class I, II or III on the basis of the controls
deemed by the FDA to be reasonably necessary to ensure their safety and
effectiveness. Class I devices are subject to general controls (e.g., labeling
and adherence to QSR) and class II devices are subject to premarket clearance
and special controls (e.g., performance standards, postmarket surveillance,
patient registries and FDA guidelines). Generally, class III devices are those
which require premarket approval by the FDA to ensure their safety and
effectiveness (e.g., life-sustaining, life-supporting and implantable devices
which have been found not to be substantially equivalent to legally marketed
devices). The FDA regulates the Company's ADCON-L, ADCON-P and ADCON-T/N
products as class III medical devices.
 
     Before a new device can be introduced into the market, the manufacturer or
distributor generally must obtain FDA clearance or approval through either a
510(k) premarket notification or a PMA. A 510(k) clearance will be granted if
the submitted data establish that the proposed device is "substantially
equivalent" to a legally marketed class I or II medical device, or to a
preamendment class III medical device (i.e., one that has been marketed since a
date prior to May 28, 1976) for which the FDA has not called for premarket
approvals. A PMA must be filed if the proposed device is not substantially
equivalent to a legally marketed device or if it is a preamendment class III
device for which the FDA has called for premarket approvals. A PMA must be
supported by extensive data, including preclinical and clinical trial data to
demonstrate the safety and efficacy of the device. If human clinical trials of a
device are required and if the device presents a "significant risk," the
manufacturer or the distributor of the device is required to obtain FDA approval
of an IDE application prior to commencing human clinical trials.
 
     The IDE application must be supported by data, typically including the
results of animal and, possibly, mechanical testing. If the IDE application is
approved by the FDA, human clinical trials may begin at a specific number of
investigational sites with a maximum specific number of patients, as approved by
the agency. The clinical trials must be conducted under the auspices of an
independent institutional review board ("IRB") established pursuant to FDA
regulations. In August 1995, the Company received FDA approval for an IDE
application permitting the initiation of a U.S. multi-center clinical trial of
ADCON-L. This clinical trial for
 
                                       38
<PAGE>   40
 
ADCON-L was initiated in January 1996. In April 1995, the Company received FDA
approval of an IDE application to conduct multi-center clinical trials of
ADCON-T/N. The ADCON-T/N multi-center clinical trials are ongoing. The Company
also received FDA conditional approval of its IDE application to conduct a
clinical pilot trial of ADCON-P on September 3, 1997 and final approval to
conduct such clinical pilot trial of ADCON-P on November 19, 1997.
 
   
     Following receipt of the PMA, if the FDA determines that the PMA is
sufficiently complete to permit a substantive review, the FDA will "file" the
application. Once the submission is filed, the FDA begins a review of the PMA.
The PMA process can be expensive, uncertain and lengthy, frequently requiring
one to several years from the date the premarket approval application is
accepted for filing. A number of devices for which premarket approval has been
sought by other companies have never been approved for marketing. The review
time is often significantly extended by the FDA, which may require more
information or clarification of information already provided in the submission.
During the review period, an advisory committee likely will be convened to
review and evaluate the application and provide recommendations to the FDA as to
whether the device should be approved. In addition, the FDA will inspect the
manufacturing facility to ensure compliance with QSR requirements prior to
approval of a PMA. If granted, the premarket approval may include significant
limitations on the indicated uses for which a product may be marketed. The FDA
prohibits promoting products for unapproved or "off-label" uses. The Company
submitted a PMA application for ADCON-L in December 1996. This application was
deemed filed in February 1997 and granted expedited review by the FDA. Based on
the results of the European pivotal clinical trials for ADCON-L and interim data
of the U.S. clinical study currently underway, the Advisory Panel of the FDA
recommended in December 1997 that ADCON-L be approved by the FDA for marketing
in the U.S. subject to certain conditions and labeling requirements. On May 27,
1998, the Company received a letter from the FDA approving the PMA for ADCON-L,
which permits the Company to market ADCON-L in the U.S.
    
 
   
     There is no certainty that the clinical studies involving ADCON-P and
ADCON-T/N will be completed in a timely manner or that the data and information
obtained will be sufficient to support the filing of a PMA. There can be no
assurance that the Company will be able to obtain necessary approvals to market
ADCON-P or ADCON-T/N or any other products under development on a timely basis,
if at all, and delays in receipt or failure to receive such approvals, the loss
of previously received approvals, or failure to comply with existing or future
regulatory requirements could have a material adverse effect on the Company's
business, financial condition and results of operations.
    
 
     Modifications to a device that is the subject of an approved PMA, its
labeling, or manufacturing process may require approval by the FDA of PMA
supplements or new PMAs. Supplements to a PMA often require the submission of
the same type of information required for an initial PMA, except that the
supplement is generally limited to that information needed to support the
proposed change from the product covered by the original PMA.
 
   
     Any products manufactured or distributed pursuant to clearance of a
premarket notification submission or an approved premarket approval application
are subject to pervasive and continuing regulation by the FDA, including
recordkeeping requirements and reporting of adverse experience with the use of
the device. The FDC Act requires that medical devices be manufactured in
registered establishments and in accordance with the QSR requirements for
medical devices. Such manufacturing facilities are subject to periodic
inspections by the FDA. The manufacturing facility utilized by EMCM in
manufacturing the Company's ADCON family of products must undergo a review and
inspection by the FDA for QSR requirements before ADCON-L can be approved by the
FDA for marketing in the U.S. In February-March 1998, the FDA inspected the
Company's headquarters and EMCM's manufacturing facility. In connection with
these inspections, the FDA issued a Form 483 listing a number of observations
relating to the Company's headquarters and a second Form 483 listing additional
observations relating to the EMCM manufacturing facility. The Company has
addressed these conditions to the FDA's satisfaction.
    
 
     The President recently signed into law the Food and Drug Administration
Modernization Act of 1997 ("FDAMA"). This legislation makes changes in the
provisions of the FDC Act affecting the regulation of devices, drugs and
biological products. With respect to devices, the changes will affect the IDE,
510(k) and PMA processes, and also will affect device standards and data
requirements, procedures relating to humanitarian and
 
                                       39
<PAGE>   41
 
breakthrough devices, tracking and postmarket surveillance, accredited third
party review, and the dissemination of off-label information. The Company cannot
predict how or when these changes will be implemented or what effect the changes
will have on the regulation of the Company's products.
 
     Regulations of Drugs -- United States.  Drugs are a category of products
that can include biologics, such as vaccines, and prescription or
over-the-counter medications. Each of these classes of products is often
regulated differently and, therefore, approval requirements, if any, can vary
significantly. Before a new drug may be commercially sold in the United States,
clinical trials and other tests on the product must be conducted and the results
submitted to the appropriate regulatory agencies as part of the approval
process. Drug products that the Company may develop are subject to FDA
regulation under the FDC Act. Drug products also would be subject to regulation
under the Public Health Service Act if they are classified as biologics. The
Company believes that its AD and other nervous system disorder products would be
regulated as new drugs.
 
     The steps required before a new drug product may be marketed in the United
States include (i) preclinical laboratory and animal tests conducted in
accordance with Good Laboratory Practices, (ii) submission to the FDA of an
application for an investigational new drug ("IND"), which must become effective
before human clinical trials may commence, (iii) well-controlled human clinical
trials to establish the safety and efficacy of the new drug product, (iv)
submission of a new drug application ("NDA") to the FDA for nonbiological drugs,
and (v) FDA approval of the NDA prior to any commercial sale or shipment of the
drug. Approval by the FDA must be obtained for each product and for each
indication to be treated with each product. The filing of an NDA and the
marketing of approved prescription drugs also requires the payment of certain
user fees to the FDA.
 
     Preclinical tests include formulation development, laboratory evaluation of
product chemistry and animal studies to assess the potential safety and efficacy
of a product formulation. Preclinical tests are submitted to the FDA as part of
the IND. Unless the FDA issues a clinical hold, the IND will become effective 30
days following its receipt by the FDA. There is no certainty that submission of
an IND will result in the ability to conduct one phase of a clinical trial or
that the lack of the issuance of a clinical hold on one phase of a clinical
trial will result in other phases or that the completion of clinical trials will
result in FDA approval. Clinical trials may be placed on hold by the FDA at any
time for a variety of reasons, particularly if safety concerns exist.
 
     Clinical trials involving the administration of the investigational drug
product to humans typically are conducted in three phases and are subject to
specific protocols that are particularly detailed in Phases II and III. Each
protocol indicating how the clinical trial will be conducted must be submitted
for review to the FDA as part of the IND. Further, each clinical study must be
conducted under the auspices of an IRB and in accordance with informed consent
requirement. The IRB considers, among other factors, ethical concerns, informed
consent requirements and protection of human subjects. The IRB or the FDA may
require changes in a protocol both prior to and after commencement of a trial.
There is no assurance that the IRB or the FDA will permit a study to go forward
or, once started, to be completed. The FDA's review of a study protocol does not
necessarily mean that if the study is successful it will constitute proof of
safety or efficacy.
 
     The three phases of clinical trials are generally conducted sequentially,
but they may overlap. Phase I testing generally involves the initial
introduction of the drug into humans for testing the safety, side effects,
dosage tolerance, metabolism and clinical pharmacology of the drug. In the case
of drugs for life-threatening diseases, the initial human testing is generally
done in patients rather than in healthy volunteers. Because these patients are
already afflicted with the target disease, it is possible that such studies may
provide results traditionally obtained in Phase II trials. These trials are
referred to as Phase I/II trials. Phase II testing generally involves
well-controlled tests in a larger but still limited patient population to
determine the efficacy of the drug for specific indications, to determine
optimal dosage and to identify possible side effects and safety risks. If a drug
is found to be effective in Phase II evaluations, expanded Phase III trials are
undertaken to evaluate the overall risks and benefits of the drug in relation to
the treated disease in light of other available therapies. Phase III studies can
include significant numbers of patients. Phase III clinical studies may be
avoided under certain circumstances. For example, under the FDA's expedited
approval interim regulations, the FDA may determine that the study is not
necessary, especially where no adequate alternative therapy exists, and if the
disease under examination is life-threatening or seriously debilitating. The FDA
may suspend clinical trials at any time if the patients are believed to be
exposed to a significant health risk.
 
                                       40
<PAGE>   42
 
     Reports of results of preclinical studies and clinical trials for
nonbiological drugs, such as those likely to be developed by the Company, are
submitted to the FDA in the form of an NDA for approval for marketing and
commercial shipment. The NDA also includes information pertaining to the
preparation of drug substances, analytical methods, drug product formulation,
details on the manufacture of finished product as well as proposed product
packaging and labeling. Submission of an NDA does not assure FDA approval for
marketing. The application review process generally takes one to three years to
complete, although reviews of treatments for cancer and other severely
debilitating or life-threatening diseases may be accelerated. However, the
process may take substantially longer if, among other things, the FDA has
questions or concerns about the safety and/or efficacy of a product. No
assurance exists that the Company's drug products will qualify for expedited or
accelerated review procedures.
 
     In general, the FDA traditionally has required at least two adequate and
well-controlled clinical studies demonstrating efficacy with sufficient levels
of statistical assurance. The recently enacted FDAMA now allows the
consideration of one such study. However, additional information may be
required. For example, the FDA also may require long-term toxicity studies or
other studies relating to product safety or efficacy. Notwithstanding the
submission of such data, the FDA ultimately may decide that the application does
not satisfy its regulatory criteria for approval. Finally, the FDA may require
additional clinical tests following NDA approval to confirm safety and efficacy
(Phase IV clinical tests). Less extensive approval requirements can apply to
generic and other types of drugs, but no assurance exists that the Company's AD
and other nervous system disorder products, or any other drug products which the
Company may develop, will qualify for such abbreviated requirements.
 
     Prospective manufacturers must also conform to the GMP requirements, permit
FDA inspection, and register and list drug products with the FDA. In complying
with GMP, manufacturers must continue to expend time, money and effort in
production, recordkeeping and quality assurance to ensure that the product meets
applicable specifications and other requirements. Failure to comply subjects the
manufacturer to possible FDA action, such as the suspension of manufacturing,
seizure of the product or voluntary recall of the product.
 
     The product testing and approval process is likely to take a substantial
number of years and involves the expenditure of substantial resources. The FDA
also may require postmarket testing and surveillance to monitor the use of the
product and continued compliance with regulatory requirements. Upon approval, a
drug only may be marketed for the approved indications in the approved dosage
forms and at the approved dosages. Adverse experiences with the product must be
reported to the FDA. Product approvals may be withdrawn if compliance with
regulatory standards is not maintained or if problems concerning safety or
efficacy of the product occur following approval.
 
   
     Foreign manufacturers of drug products intended for importation into the
United States also must comply with relevant registration and listing
requirements, the GMP regulations, and are subject to periodic inspection by the
FDA or by local authorities under agreement with the FDA.
    
 
     Other Regulation.  The advertising of FDA-regulated products may be subject
to Federal Trade Commission jurisdiction. The Company also is subject to
regulations by the Occupational Safety and Health Administration and by the U.S.
Environmental Protection Agency under such statutes as the Toxic Substances
Control Act, the Resource Conservation and Recovery Act and other laws. Various
states and other foreign governments often have comparable health and
environmental laws.
 
     Foreign Regulation.  The Company is subject in many countries to regulatory
requirements concerning drugs and devices and relating to human clinical trials,
marketing approvals and product testing. See "Risk Factors -- Uncertainty of
Health Care Reimbursement."
 
   
     Member states of the European Union were required to put in effect the
Medical Devices Directive ("MDD") from January 1, 1995. The scope of this
directive covers all medical devices except active implants and in vitro
diagnostic devices, which are subject to separate directives. The MDD includes,
among others, requirements with respect to the design, safety, performance and
manufacture of products. Under the system established by the MDD, medical
devices must qualify for CE marking in order to be placed on the market and put
into service after June 14, 1998. During the transitional period (from January
1, 1995 to June 14, 1998)
    
 
                                       41
<PAGE>   43
 
   
medical devices could be placed on the market and put into service if they
complied with the requirements of the MDD or national requirements that were in
force on December 31, 1994.
    
 
     In order to qualify for CE Marking, the manufacturer must comply with the
Essential Requirements of the MDD. These relate to safety and performance. In
order to demonstrate compliance with these requirements of the MDD, the
manufacturer must undergo conformity assessment which depends on the class of
the product. The Company has chosen as its conformity assessment EC
type-examination of the product by a Notified Body and assessment of the
manufacturer's quality system used in production by a Notified Body. The
Notified Body chosen by the Company is a Dutch non-governmental entity which,
after an accreditation proceeding, has been notified by the Dutch Competent
Authority to the European Commission that it may carry out conformity assessment
tasks under the MDD. Once all the necessary conformity assessment tasks have
been completed to the satisfaction of the Notified Body and the manufacturer is
convinced that it is in full compliance with the MDD, CE Marking may be affixed
on the products concerned.
 
     Although member countries must accept for marketing medical devices bearing
a CE Marking without imposing further requirements related to product safety and
performance, each country may require the use of its own language on labels and
instructions for use. National Competent Authorities, who are required to
enforce compliance with the requirements of the MDD, can restrict, prohibit and
recall CE Marked products if they are considered to be unsafe. Such a decision
must be confirmed by the European Commission in order to be valid. Member
countries can impose additional requirements as long as they do not violate the
MDD or constitute technical barriers to trade. There can be no assurances,
however, that member countries will continue to recognize the restrictions on
such countries to impose additional requirements for CE Marked products.
 
     Within the European Union, premarket compliance for devices must be
supported by clinical data of a type and extent set out by European Union
directives, standards as interpreted by Competent Authorities and Notified
Bodies. The regulatory compliance process for the commencement of clinical
trials varies currently from country to country.
 
     The new post-1994 regimes for medical devices are based on directives.
Devices will be subject to, in addition to other future European Union or other
countries legislation, continued national regulation on pricing and
reimbursement, which may vary from country to country. Certain other
requirements such as clinical investigations and post marketing surveillance,
will probably be subject to significant variation among countries. The
regulation of drugs in the European Union is subject to a separate and different
regulatory framework which requires, among other things, premarket approval by
the applicable regulatory agencies before sale of such products.
 
PATENTS, TRADEMARKS AND TRADE SECRETS
 
     Proprietary protection for the Company's product candidates, processes and
know-how is important to the Company's business. The Company's policy is to file
patent applications to protect technology, inventions and improvements that are
considered important to the development of its business. The Company also relies
upon trade secrets, know-how and continuing technological innovation to develop
and maintain its competitive position. The Company plans to aggressively
prosecute and defend its patents and proprietary technology.
 
   
     The Company owns three issued U.S. patents, one of which expires in 2014,
and two of which expire in 2015, two pending U.S. patent applications, and
corresponding foreign patent applications relating to its ADCON products. The
issued patents cover compositions included in the ADCON products and methods for
their use. Claims directed to related compositions and methods are being pursued
in the pending applications.
    
 
     The Company has been approached by a third-party regarding the potential
infringement, by the ADCON line of products, of two U.S. patents for which the
third-party is the licensee. Based upon its investigation, the Company believes
that the claims of such issued patents are invalid or not infringed by the ADCON
products. There can, however, be no assurance that the Company will not be sued
by such third party, and the Company could incur substantial costs and diversion
of management resources with respect to the defense of any such lawsuit, which
costs and diversion could have a material adverse effect on the Company's
business, prospects, financial condition and results of operations. Further,
there can be no assurance that infringement of these two
 
                                       42
<PAGE>   44
 
patents will not be found to exist, that the Company will not be enjoined from
making, using and selling its ADCON products, or that the Company will not be
ordered to pay damages that would have a material adverse effect on the
Company's ability to conduct its business. Moreover, there can be no assurance
that a sublicense under these patents, if necessary, will be available on
reasonable terms, if at all.
 
     As a result of allegations made by Dr. Jerry Silver, an employee of Case
Western Reserve University ("CWRU"), and CWRU, that Dr. Silver is a co-inventor
of the Company's issued U.S. Patent No. 5,605,938, which is one of the Company's
three issued patents relating to its ADCON technology, and which covers certain
of the Company's ADCON products, the Company filed a civil action in the United
States District Court for the Northern District of Ohio, Eastern Division,
entitled Gliatech Inc. v. Dr. Jerry Silver and Case Western Reserve University,
Civil Action No. 1:97CV 2306, requesting, inter alia, a declaration that Dr.
Silver is not a co-inventor of the patent. On March 17, 1998, the suit was
dismissed pursuant to the terms and conditions of a Settlement Agreement,
effective as of February 20, 1998 by and among the Company, Dr. Silver and CWRU.
 
     A U.S. patent application, filed solely by the Company, has been issued
covering the composition of matter for a series of synthetic H(3) receptor
antagonist compounds, which is due to expire in 2015. Several additional U.S.
patent applications and their corresponding foreign applications for additional
series of H(3) receptor antagonists and one series of H(3) receptor agonist
compounds, their methods of medical use and pharmaceutical compositions, are
pending. No assurance can be given that any claims relating to these products
and methods will be issued.
 
     The Company is prosecuting its patent applications with the USPTO but the
Company does not know whether any of its applications will result in the
issuance of any patents or, if any patents are issued, whether any issued patent
will provide significant proprietary protection or will be circumvented or
invalidated. During the course of patent prosecution, patent applications are
evaluated, inter alia, for utility, novelty, nonobviousness and enablement. The
USPTO may require that the claims of an initially filed patent application be
amended if it is determined that the scope of the claims includes subject matter
that is not useful, novel, nonobvious or enabled. Furthermore, in certain
instances, the practice of a patentable invention may require a license from the
holder of dominant patent rights. In cases where one party believes that it has
a claim to an invention covered by a patent application or patent of a second
party, the first party may institute an interference proceeding in the USPTO or
such a proceeding may otherwise be declared by the USPTO. In general, in an
interference proceeding, the USPTO would review the competing patents and/or
patent applications to determine the validity of the competing claims, including
but not limited to determining priority of invention. Any such determination
would be subject to appeal in the appropriate U.S. federal courts.
 
     There can be no assurance that additional patents will be obtained by the
Company or that issued patents will provide substantial protection or be of
commercial benefit to the Company. The issuance of a patent is not conclusive as
to its validity or enforceability, nor does it provide the patent holder with
freedom to operate without infringing the patent rights of others. A patent
could be challenged by litigation and, if the outcome of such litigation were
adverse to the patent holder, competitors could be free to use the subject
matter covered by the patent, or the patent holder may license the technology to
others in settlement of such litigation. The invalidation of key patents owned
by or licensed to the Company or non-approval of pending patent applications
could create increased competition, with potential adverse effects on the
Company and its business prospects. In addition, there can be no assurance that
any patents on, or applications of, the Company's technology will not infringe
patents or proprietary rights of others or that licenses that might be required
as a result of such infringement for the Company's processes or products would
be available on commercially reasonable terms, if at all.
 
     The Company cannot predict whether its or its competitors' patent
applications will result in valid patents being issued. Litigation, which could
result in substantial cost to the Company, may also be necessary to enforce the
Company's patent and proprietary rights and/or to determine the scope and
validity of others' proprietary rights. The Company may participate in
interference proceedings that may in the future be declared by the U.S. Patent
and Trademark Office to determine priority of invention, which could result in
substantial cost to the Company. There can be no assurance that the outcome of
any such litigation or interference proceedings will be
 
                                       43
<PAGE>   45
 
favorable to the Company or that the Company will be able to obtain licenses to
technology that it may require or that, if obtainable, such technology can be
licensed at a reasonable cost.
 
     The patent position of biotechnology and biopharmaceutical firms generally
is highly uncertain and involves complex legal and factual questions. To date,
no consistent policy has emerged regarding the breadth of claims allowed in
biotechnology and biopharmaceutical patents. Accordingly, there can be no
assurance that patent applications owned or licensed by the Company will result
in patents being issued or that the patents will afford protection against
competitors with similar technology.
 
     The Company also attempts to protect its proprietary compounds, products
and processes by relying on trade secret laws, and on non-disclosure and
confidentiality agreements. The Company requires its employees, consultants,
outside scientific collaborators and sponsored researchers, and other advisors
to execute confidentiality agreements upon the commencement of employment or
consulting relationships with the Company. These agreements generally provide
that all confidential information developed or made known to the individual
during the course of the relationships is to be kept confidential and not
disclosed to third parties except in specific circumstances. In the case of
employees, the agreements provide that any inventions conceived by the
individual within the scope of his employment shall be the exclusive property of
the Company. There can be no assurance, however, that these agreements will
provide meaningful protection for any of the Company's trade secrets in the
event of unauthorized use or disclosure of such information. See "Risk
Factors -- Patents, Licenses and Proprietary Rights."
 
     The medical device industry has been characterized by extensive litigation
regarding patents and other intellectual property rights, and companies in the
medical device industry have employed intellectual property litigation to gain a
competitive advantage. There can be no assurance that the Company will not
become subject to patent infringement claims or litigation or interference
proceedings declared by the USPTO to determine the priority of invention. The
defense and prosecution of intellectual property suits, USPTO interference
proceedings and related legal and administrative proceedings are both costly and
time-consuming. Litigation may be necessary to enforce patents issued to the
Company, to protect trade secrets or know-how owned by the Company or to
determine the enforceability, scope and validity of the proprietary rights of
others. Any litigation or interference proceedings will result in substantial
expense to the Company and significant diversion of effort by the Company's
technical and management personnel. An adverse determination in litigation or
interference proceedings to which the Company may become a party, including any
litigation that may arise against the Company could subject the Company to
significant liabilities to third parties or require the Company to seek licenses
from third parties or prevent the Company from marketing its products in certain
areas, or at all. Although patent and intellectual property disputes regarding
medical devices have often been settled through licensing or similar
arrangements may be substantial and could include ongoing royalties.
Furthermore, there can be no assurance that the necessary licenses would be
available to the Company on satisfactory terms, if at all. Adverse
determinations in a judicial or administrative proceeding or failure to obtain
necessary licenses could prevent the Company from marketing its products, which
would have a material adverse effect on the Company's business, prospects,
financial condition and results of operation.
 
EMPLOYEES
 
     As of March 31, 1998, the Company had 62 full-time employees, 21 of whom
hold a Ph.D. or M.D. degree; 40 employees are engaged in, or directly support,
research and development; 11 employees are engaged in the sales and marketing of
the ADCON family of products and the remaining employees perform executive or
administrative functions.
 
FACILITIES
 
   
     The Company's personnel conduct the Company's operations at a 50,925 square
foot leased facility in Beachwood, Ohio, a suburb of Cleveland. The lease for
such facility expires on December 31, 2001. The Company currently subleases a
4,600 square foot portion of this space. The Company believes its current
facilities are adequate for its existing product development programs. The
Company is currently evaluating possible alternative sites in Ohio,
Massachusetts and North Carolina for its operations; however, no definitive
plans have been made as of the date hereof.
    
 
                                       44
<PAGE>   46
 
                                   MANAGEMENT
 
     The executive officers, key employees and Directors of the Company consist
of the following individuals:
 
<TABLE>
<CAPTION>
NAME                                         AGE                    POSITION
- ----                                         ---                    --------
<S>                                          <C>   <C>
Thomas O. Oesterling, Ph.D.................  60    President, Chief Executive Officer and
                                                   Director
Kurt R. Brunden, Ph.D......................  40    Vice President, Research
Rodney E. Dausch...........................  53    Vice President, Chief Financial Officer and
                                                   Secretary
Jon D. Schoeler............................  48    Vice President, Worldwide Sales and
                                                   Marketing
Raymond P. Silkaitis, Ph.D.................  48    Vice President, Medical and Regulatory
                                                   Affairs
Michael A. Zupon, Ph.D.....................  43    Vice President, Product Development and
                                                   Operations
Robert P. Pinkas (*).......................  44    Chairman of the Board and Treasurer
William A. Clarke..........................  59    Director
Theodore E. Haigler, Jr. (+)...............  73    Director
Ronald D. Henriksen (*)....................  58    Director
Irving S. Shapiro (+)......................  81    Director
John L. Ufheil (*).........................  64    Director
</TABLE>
 
- ------------------
 
(*) Member of the Compensation Committee.
(+) Member of the Audit Committee.
 
     THOMAS O. OESTERLING, PH.D. has served as President, Chief Executive
Officer and a Director of the Company since June 1989. From 1984 to 1986, he was
Senior Vice President, Research and Development of Collaborative Research,
Incorporated, a manufacturer of diagnostic reagents for genetic research and
testing, and from 1986 to 1989, he was President. Prior to 1984, Dr. Oesterling
had 18 years of experience in pharmaceutical and medical management and research
and development for the Upjohn Company, Johnson & Johnson, and Mallinckrodt Inc.
Dr. Oesterling received his Ph.D. in Pharmaceutical Chemistry from the Ohio
State University.
 
     KURT R. BRUNDEN, PH.D. has served as Vice President, Research since January
1997. Dr. Brunden joined the Company in July 1991 as Head of Biomolecular
Research. He was subsequently promoted to the position of Director, Exploratory
Research in 1992 and Senior Director, Exploratory Research in 1995. Prior to
joining the Company, Dr. Brunden was a faculty member in the Department of
Biochemistry at the University of Mississippi Medical Center. He received his
Ph.D. in Biochemistry from Purdue University in 1985, and obtained post-
doctoral training in the Departments of Neurology and Biochemistry/Molecular
Biology at the Mayo Clinic.
 
     RODNEY E. DAUSCH joined the Company as Vice President and Chief Financial
Officer in March 1995. In August 1995, Mr. Dausch was elected Secretary of the
Company. Prior to joining the Company and since February 1994, Mr. Dausch was
Vice President of Finance and Administration of Oncologix, Inc., a
biopharmaceutical company. From May 1987 to January 1994, he was Vice President
of Finance and Administration of Oncor, Inc., a manufacturer of diagnostic
products for detection of cancer diseases. Prior to 1987 he held the position of
Vice President of Finance and Administration with CPM Group, Inc., a real estate
development company, and Bethesda Research Laboratories, Inc., a biotechnology
company. Mr. Dausch holds a B.S. in Accounting from Loyola College and is a
Certified Public Accountant in the State of Maryland.
 
     JON D. SCHOELER has served as Vice President, Worldwide Sales and Marketing
since July 1996. Prior to joining the Company, from August 1995 to July 1996,
Mr. Schoeler was Director, Worldwide Sales and Marketing at St. Jude Medical
Inc., a biopharmaceutical company. From July 1991 to January 1995, he was Vice
President of Sales and Marketing of American Cyanamid, a manufacturer of medical
devices. Mr. Schoeler holds a B.S. in Industrial Engineering from the University
of Toronto.
 
                                       45
<PAGE>   47
 
     RAYMOND P. SILKAITIS, PH.D. joined the Company as Director, Regulatory
Affairs in April 1994. In January 1996, Dr. Silkaitis was promoted to Vice
President, Regulatory Affairs. In April 1996, he became the Vice President of
Medical and Regulatory Affairs. Prior to joining the Company, Dr. Silkaitis held
the position of Director, Clinical Affairs, Director, Regulatory Affairs and
Biologics Project Manager at Zimmer Inc. a division of Bristol-Myers Squibb
Company, a pharmaceutical company. Dr. Silkaitis also serves as the industry
representative for the Orthopaedic and Rehabilitation Devices Advisory Panel for
the FDA.
 
     MICHAEL A. ZUPON, PH.D. has served as Vice President, Product Development
and Operations since June 1993. Prior to joining the Company, Dr. Zupon had 12
years of experience in a variety of product development positions at
Schering-Plough Corporation, a pharmaceutical company, most recently as
Director, Drug Delivery and Technology Assessment from January 1991 to June 1993
and as Director, Pharmaceutical Process Development from April 1988 to January
1991. Dr. Zupon received his B.S. and Ph.D. from the University of Utah College
of Pharmacy and also received his M.B.A. from the University of Utah Graduate
School of Business.
 
     ROBERT P. PINKAS has served as Chairman of the Board of Directors and
Treasurer of the Company since 1988. He is a Director of Pediatric Services of
America Inc., Quad Systems Corporation, Brantley Capital Corporation, Waterlink,
Inc. and Medirisk, Inc. Mr. Pinkas is the founding general partner of Brantley
Venture Partners LP, a venture capital firm formed in 1987.
 
     WILLIAM A. CLARKE became a Director of the Company in May 1998. Mr. Clarke
has been retired since 1996. Prior to his retirement, Mr. Clarke served as
President of Johnson & Johnson Medical Inc., a medical supplier. Mr. Clarke is
also a Director of Medical Device Technologies.
 
     THOMAS E. HAIGLER, JR. has served as a Director of the Company since May
1996. Mr. Haigler has been an independent management consultant since his
retirement in 1989. From 1986 until his retirement in 1989, he served as
President, Chief Executive Officer and Director of Burroughs Wellcome Co., a
pharmaceutical company, and Director of Glaxo Wellcome PLC, England. Mr. Haigler
is also a Director of FAC Realty Trust, Inc.
 
     RONALD D. HENRIKSEN has served as a Director of the Company since May 1997.
In April 1996, Mr. Henriksen became Chief Executive Officer of Itasca Ventures
LLC, a medical technology company. From March 1993 through December 1995, he was
the President and Chief Executive Officer of Khepri Pharmaceuticals, a
development stage biotechnology company. From 1970 to March 1993, he held a
series of managerial and executive positions at Eli Lilly and Company, a
pharmaceutical company. In addition until March 1993, he was Director of
Business Development for Eli Lilly and Company. Mr. Henriksen currently serves
as a Director of QLT PhotoTherapeutics, Inc.
 
     IRVING S. SHAPIRO has served as a Director since December 1993. Mr. Shapiro
has been Of Counsel to the law firm of Skadden, Arps, Slate, Meagher & Flom LLP
in Wilmington, Delaware since 1990 and from 1981 to 1989 was a Partner of that
firm. Mr. Shapiro currently serves as Director of J.P. Morgan Florida, FSB,
Pediatric Services of America Inc. and Sola International Inc.
 
     JOHN L. UFHEIL has served as a Director of the Company since May 1993. From
April 1990 until his retirement in May 1994, he served as Chairman, President,
and Chief Executive Officer of Celgene Corporation, a biotechnology company.
 
                                       46
<PAGE>   48
 
                             PRINCIPAL STOCKHOLDERS
 
     The following table sets forth certain information with respect to
beneficial ownership of the Company's Common Stock as of May 1, 1998 by (i) each
person (or affiliated group of persons) known by the Company to own beneficially
more than 5% of the Company's Common Stock, (ii) each Director of the Company,
(iii) each of the executive officers and (iv) all Directors and executive
officers of the Company as a group.
 
<TABLE>
<CAPTION>
                                                 AMOUNT AND NATURE            PERCENT OWNERSHIP
                                                   OF BENEFICIAL      ---------------------------------
NAME OF BENEFICIAL OWNER                           OWNERSHIP(1)       BEFORE OFFERING    AFTER OFFERING
- ------------------------                         -----------------    ---------------    --------------
<S>                                              <C>                  <C>                <C>
State of Wisconsin Investment Board (2)........       685,500                9.0%              7.1%
Thomas O. Oesterling, Ph.D. (3)................       233,069                3.0               2.4
Robert P. Pinkas (4)...........................       342,420                4.5               3.6
William A. Clarke..............................            --                  *                 *
Ronald D. Henriksen (5)........................         1,333                  *                 *
Irving S. Shapiro (6)..........................        13,867                  *                 *
John L. Ufheil (7).............................        15,867                  *                 *
Theodore E. Haigler, Jr. (8)...................         4,000                  *                 *
Rodney E. Dausch (9)...........................        58,316                  *                 *
Jon D. Schoeler (10)...........................        16,977                  *                 *
Michael A. Zupon, Ph.D. (11)...................        80,728                1.1                 *
All executive officers and directors as a group
  (10 persons)(12).............................       766,577                9.6%              7.7%
</TABLE>
 
- ------------------
 
* Less than one percent of the outstanding shares.
 
 (1) Beneficial ownership is determined in accordance with rules of the
     Commission. Shares of Common Stock subject to options currently exercisable
     or exercisable within 60 days of the date of this Prospectus are deemed
     outstanding for computing the percentage beneficially owned by such holder
     but are not deemed outstanding for purposes of computing the percentage
     beneficially owned by any other person. Except as otherwise indicated, the
     Company believes that the beneficial owners of the Common Stock listed
     above, based on information furnished by such owners, have sole investment
     and voting power with respect to such shares, subject to community property
     laws where applicable, and that there are no other affiliations among the
     stockholders listed in the table.
 
 (2) The address of the State of Wisconsin Investment Board is P.O. Box 7842,
     Madison, Wisconsin 53707.
 
 (3) Includes 201,750 shares of Common Stock purchasable upon the exercise of
     stock options.
 
 (4) Includes (i) 11,667 shares of Common Stock purchasable upon exercise of
     stock options, (ii) 33,911 shares of Common Stock owned by Brantley Venture
     Partners, L.P. and (iii) 296,842 shares of Common Stock owned by Brantley
     Venture Partners II, L.P. Mr. Pinkas is a general partner of Pinkas Family
     Partners, L.P., the general partner of each of Brantley Venture Management,
     L.P., Brantley Venture Management II, the general partners, respectively,
     of Brantley Venture Partners L.P. and Brantley Venture Partners II, L.P.
 
 (5) Consists of 1,333 shares of Common Stock purchasable upon the exercise of
     stock options.
 
 (6) Consists of 13,867 shares of Common Stock purchasable upon the exercise of
     stock options.
 
 (7) Consists of 15,867 shares of Common Stock purchasable upon the exercise of
     stock options.
 
 (8) Consists of 4,000 shares of Common Stock purchasable upon the exercise of
     stock options.
 
 (9) Includes 56,250 shares of Common Stock purchasable upon the exercise of
     stock options.
 
(10) Includes 16,250 shares of Common Stock purchasable upon the exercise of
     stock options.
 
(11) Includes 64,750 shares of Common Stock purchasable upon the exercise of
     stock options.
 
(12) Includes 385,734 shares of Common Stock purchasable upon the exercise of
     stock options.
 
                                       47
<PAGE>   49
 
                                  UNDERWRITING
 
     Subject to the terms and conditions of the Underwriting Agreement, the
Underwriters named below (the "Underwriters"), through their representatives,
Cowen & Company, Furman Selz LLC and Vector Securities International, Inc. (the
"Representatives"), have severally agreed to purchase from the Company the
following respective number of shares of Common Stock at the public offering
price less the underwriting discounts and commissions set forth on the cover
page of this Prospectus:
 
<TABLE>
<CAPTION>
                                                              NUMBER OF SHARES
UNDERWRITER                                                   OF COMMON STOCK
- -----------                                                   ----------------
<S>                                                           <C>
Cowen & Company.............................................
Furman Selz LLC.............................................
Vector Securities International, Inc. ......................
                                                                 ---------
          Total.............................................     2,000,000
                                                                 =========
</TABLE>
 
     The Underwriting Agreement provides that the obligations of the
Underwriters are subject to certain conditions precedent and that the
Underwriters will purchase all of the shares of Common Stock offered hereby if
any of such shares are purchased.
 
     The Company has been advised by the Representatives of the Underwriters
that the Underwriters propose to offer the shares of Common Stock to the public
at the public offering price set forth on the cover page of this Prospectus and
to certain dealers at such price less a concession not in excess of $
per share. The Underwriters may allow, and such dealers may reallow, a
concession not in excess of $          per share to certain other dealers. After
the public offering, the offering price and other selling terms may be changed
by Representatives of the Underwriters.
 
     The Company has granted to the Underwriters an option, exercisable no later
than 30 days after the date of this Prospectus, to purchase up to 300,000
additional shares of Common Stock at the public offering price less the
underwriting discounts and commissions set forth on the cover page of this
Prospectus. To the extent that the Underwriters exercise such option, each of
the Underwriters will have a firm commitment to purchase approximately the same
percentage thereof that the number of shares of Common Stock to be purchased by
it shown in the above table bears to 2,000,000, and the Company will be
obligated, pursuant to the option, to sell such shares to the Underwriters. The
Underwriters may exercise such option only to cover over-allotments made in
connection with the sale of Common Stock offered hereby. If purchased, the
Underwriters will offer such additional shares on the same terms as those on
which the 2,000,000 shares are being offered.
 
     The Company has agreed to indemnify the several Underwriters against
certain liabilities, including liabilities under the Securities Act.
 
   
     The Directors, officers and certain stockholders of the Company, holding in
the aggregate approximately 435,041 shares of Common Stock outstanding prior to
this offering and 388,201 shares of Common Stock subject to exercisable stock
options, and the Company have agreed that, for a period of 90 days after the
effective date of the Registration Statement, they will not, without the prior
written consent of Cowen & Company, offer, sell or otherwise dispose of any
shares of Common Stock or any securities convertible into, or exchangeable for,
or warrants to purchase, any shares of Common Stock, or grant any option to
purchase, any shares of Common Stock, except that the Company may issue (i)
shares or options to purchase Common Stock pursuant to the Company's employee
and director stock plans and (ii) shares of Common Stock upon the exercise of
outstanding warrants.
    
 
     In order to facilitate this offering, the Underwriters may engage in
transactions that stabilize, maintain or otherwise affect the price of the
Common Stock. Specifically, the Underwriters may over-allot in connection with
this offering, creating a short position in the Common Stock for their own
account. In addition, to cover over-allotments or to stabilize the price of the
Common Stock, the Underwriters may bid for, and purchase, shares of the Common
Stock in the open market. The Underwriters may also reclaim selling concessions
allowed to an underwriter or a dealer for distributing the Common Stock in this
offering, if the Underwriters repurchase previously distributed Common Stock in
transactions to cover their short positions, in stabilization transactions or
                                       48
<PAGE>   50
 
otherwise. Finally, the Underwriters may bid for and purchase shares of the
Common Stock in market making transactions and impose penalty bids. These
activities may stabilize or maintain the market price of the Common Stock above
market levels that may otherwise prevail. The Underwriters are not required to
engage in these activities and may end passive market making activities at any
time.
 
     The Underwriters and dealers may engage in passive market making
transactions in the Common Stock in accordance with Rule 103 of Regulation M
promulgated by the Commission. In general, a passive market maker may not bid
for, or purchase, the Common Stock at a price that exceeds the highest
independent bid. In addition, the net daily purchases made by any passive market
maker generally may not exceed 30% of its average daily trading volume in the
Common Stock during a specified two-month prior period or 200 shares, whichever
is greater. A passive market maker must identify passive market making bids as
such on the Nasdaq electronic inter-dealer reporting system. Passive market
making may stabilize or maintain the market price of the Common Stock above
independent market levels.
 
     The Underwriters have advised the Company that the Underwriters do not
intend to confirm sales to any account over which they exercise discretionary
authority in excess of five percent of the number of shares of Common Stock
offered hereby.
 
                                 LEGAL OPINIONS
 
     The validity of the shares of Common Stock offered hereby will be passed
upon for the Company by Jones, Day, Reavis & Pogue, Cleveland, Ohio. Certain
legal matters in connection with this offering will be passed upon for the
Underwriters by Brobeck, Phleger & Harrison LLP, New York, New York.
 
                                    EXPERTS
 
     The consolidated financial statements of Gliatech Inc. at December 31, 1996
and 1997, and for each of the three years in the period ended December 31, 1997,
appearing in this Prospectus and Registration Statement have been audited by
Ernst & Young LLP, independent auditors, as set forth in their report thereon
appearing elsewhere herein, and are included in reliance upon such report given
upon the authority of such firm as experts in accounting and auditing.
 
   
     The consolidated financial statements of Gliatech Inc. appearing in
Gliatech Inc.'s Annual Report (Form 10-K) for the year ended December 31, 1997
and for the period from inception of operations (August 31, 1988) through
December 31, 1997, have been audited by Ernst & Young LLP, independent auditors,
as set forth in their report thereon included therein and incorporated herein by
reference. Such consolidated financial statements are incorporated herein by
reference in reliance upon such report given upon the authority of such firm as
experts in accounting and auditing.
    
 
     The statements in this Registration Statement, in the sections captioned
"Risk Factors -- Patents, Licenses and Proprietary Rights" and
"Business -- Patents, Trademarks and Trade Secrets," relating to United States
patent matters, other than those statements relating to histamine H(3)
compounds, have been reviewed and approved by Pennie & Edmonds LLP, New York,
New York, patent counsel to the Company, and have been included herein in
reliance upon the review and approval by such firm as experts in United States
patent law.
 
                                       49
<PAGE>   51
 
                             AVAILABLE INFORMATION
 
     The Company has filed a Registration Statement on Form S-3, of which this
Prospectus is a part (the "Registration Statement"), with the Commission under
the Securities Act with respect to the shares of Common Stock offered hereby.
This Prospectus does not contain all the information set forth in the
Registration Statement and the exhibits and schedules thereto. For further
information with respect to the Company and the Common Stock offered hereby,
reference is made to the Registration Statement, including the financial
statements and exhibits filed therewith. Statements made in this Prospectus as
to the contents of any contract, agreement or other document that is filed as an
exhibit to the Registration Statement or otherwise with the Commission are not
necessarily complete, and, in each instance, reference is made to the copy of
such document filed with the Commission. Each such statement shall be deemed
qualified in its entirety by such reference. Copies of the Registration
Statement, including all exhibits and schedules thereto, may be examined or
obtained from the Commission as described below.
 
     The Company is subject to the reporting requirements of the Exchange Act
and, in accordance therewith, files reports and other information with the
Commission. Reports and other information filed by the Company can be inspected
and copied at the public reference facilities maintained by the Commission at
Room 1024, 450 Fifth Street, N.W., Washington, D.C. 20549, and at the following
Regional Offices of the Commission: Midwest Regional Office, 500 West Madison
Street, Suite 1400, Chicago, Illinois 60661-2511 and Northeast Regional Office,
Seven World Trade Center, Suite 1300, New York, New York 10048. Copies of such
material can be obtained from the Public Reference Section of the Commission at
450 Fifth Street, N.W., Washington, D.C. 20549 at prescribed rates. The
Commission also maintains a Website that contains reports, proxy and information
statements and other information regarding the Company filed electronically with
the Commission. The address of such site is: http://www.sec.gov. The Company's
Common Stock is quoted on the Nasdaq National Market and in connection
therewith, reports and other information concerning the Company may also be
inspected at the offices of The Nasdaq Stock Market, Inc. at 1735 K Street,
N.W., Washington, D.C. 20006-1500.
 
                INCORPORATION OF CERTAIN DOCUMENTS BY REFERENCE
 
     The following documents filed by the Company with the Commission (File No.
0-20096) are hereby incorporated by reference in this Prospectus pursuant to the
Exchange Act:
 
     (1) The Annual Report of the Company on Form 10-K for the fiscal year ended
         December 31, 1997;
 
     (2) The Quarterly Report of the Company on Form 10-Q for the quarterly
         period ended March 31, 1998;
 
   
     (3) The Current Report of the Company on Form 8-K filed with the Commission
         on May 28, 1998;
    
 
   
     (4) The description of the Common Stock of the Company contained in its
         Registration Statement on Form 8-A filed with the Commission on October
         3, 1995; and
    
 
   
     (5) The description of the Rights attached to the Common Stock of the
         Company contained in its Registration Statement on Form 8-A/A filed
         with the Commission on July 2, 1997.
    
 
     All reports and other documents subsequently filed by the Company pursuant
to Sections 13(a), 13(c), 14 or 15(d) of the Exchange Act after the date of this
Prospectus and prior to the termination of this offering shall be deemed to be
incorporated by reference herein and to be a part hereof from the date of filing
of such reports and documents. Any statement contained in a document all or a
portion of which is incorporated or deemed to be incorporated by reference
herein shall be deemed to be modified or superseded for purposes of this
Prospectus to the extent that a statement contained herein or in any other
subsequently filed document which also is or is deemed to be incorporated by
reference herein modifies or supersedes such statement. Any statement so
modified will not be deemed to constitute a part of this Prospectus, except as
so modified, and any statement so superseded will not be deemed to constitute a
part of this Prospectus.
 
     The Company will provide without charge to each person to whom this
Prospectus is delivered, on the written or oral request of such person, a copy
(without exhibits other than exhibits specifically incorporated by reference) of
any or all documents incorporated by reference into this Prospectus. Requests
for such copies should be directed to Rodney E. Dausch, Vice President and Chief
Financial Officer, 23420 Commerce Park Road, Cleveland, Ohio 44122, telephone
(216) 831-3200.
 
                                       50
<PAGE>   52
 
                         GLIATECH INC. AND SUBSIDIARIES
                        (A DEVELOPMENT STAGE ENTERPRISE)
 
                   INDEX TO CONSOLIDATED FINANCIAL STATEMENTS
 
<TABLE>
<CAPTION>
 
<S>                                                           <C>
Report of Ernst & Young LLP, Independent Auditors...........   F-2
 
Consolidated Balance Sheets at December 31, 1996 and 1997
  and March 31, 1998 (unaudited)............................   F-3
 
Consolidated Statements of Operations for the years ended
  December 31, 1995, 1996 and 1997 and for the period from
  inception of operations (August 31, 1988) through March
  31, 1998 (unaudited) and for the three months ended March
  31, 1997 and 1998 (unaudited).............................   F-4
 
Consolidated Statements of Changes in Stockholders' Equity
  for the period from inception of operations (August 31,
  1988) through December 31, 1988 and for the years ended
  December 31, 1989, 1990, 1991, 1992, 1993, 1994, 1995,
  1996 and 1997 and for the three months ended March 31,
  1998 (unaudited)..........................................   F-5
 
Consolidated Statements of Cash Flows for the years ended
  December 31, 1995, 1996 and 1997 and for the period from
  inception of operations (August 31, 1988) through March
  31, 1998 (unaudited) and for the three months ended March
  31, 1997 and 1998 (unaudited).............................   F-7
 
Notes to Consolidated Financial Statements..................   F-8
</TABLE>
 
                                       F-1
<PAGE>   53
 
               REPORT OF ERNST & YOUNG LLP, INDEPENDENT AUDITORS
 
Board of Directors and Stockholders
Gliatech Inc.
 
We have audited the accompanying consolidated balance sheets of Gliatech Inc.
and Subsidiaries (a development stage enterprise) as of December 31, 1996 and
1997, and the consolidated statements of operations, changes in stockholders'
equity, and cash flows for each of the three years in the period ended 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 audits.
 
We conducted our audits in accordance with generally accepted auditing
standards. Those standards require that we plan and perform the audit to obtain
reasonable assurance about whether the financial statements are free of material
misstatement. An audit includes examining, on a test basis, evidence supporting
the amounts and disclosures in the financial statements. An audit also includes
assessing the accounting principles used and significant estimates made by
management, as well as evaluating the overall financial statement presentation.
We believe that our audits provide a reasonable basis for our opinion.
 
In our opinion, the consolidated financial statements referred to above present
fairly, in all material respects, the consolidated financial position of
Gliatech Inc. and Subsidiaries at December 31, 1996 and 1997, and the
consolidated results of their operations and their cash flows for each of the
three years in the period ended December 31, 1997, in conformity with generally
accepted accounting principles.
 
                                               /S/ ERNST & YOUNG LLP
 
Cleveland, Ohio
March 10, 1998
 
                                       F-2
<PAGE>   54
 
                         GLIATECH INC. AND SUBSIDIARIES
                        (A DEVELOPMENT STAGE ENTERPRISE)
 
                          CONSOLIDATED BALANCE SHEETS
 
<TABLE>
<CAPTION>
                                                             DECEMBER 31,
                                                      --------------------------     MARCH 31,
                                                         1996           1997           1998
                                                      -----------    -----------    -----------
                                                                                    (UNAUDITED)
<S>                                                   <C>            <C>            <C>
ASSETS
Current assets:
  Cash and cash equivalents.........................  $ 9,120,547    $ 5,601,398    $ 2,697,037
  Short-term investments............................    8,875,222      5,940,476      5,345,077
  Accounts receivable...............................      331,157        544,051        489,801
  Government grants receivable......................        7,290        207,080        206,574
  Inventories.......................................      387,118        164,078        560,486
  Prepaid expenses and other........................      277,276        278,714        248,122
                                                      -----------    -----------    -----------
Total current assets................................   18,998,610     12,735,797      9,547,097
Property and equipment, net.........................    1,129,671      1,277,519      1,293,814
Other assets, net...................................      675,959        792,072        817,925
                                                      -----------    -----------    -----------
Total assets........................................  $20,804,240    $14,805,388    $11,658,836
                                                      ===========    ===========    ===========
LIABILITIES AND STOCKHOLDERS' EQUITY
Current liabilities:
  Accounts payable and other accrued expenses.......  $ 1,369,583    $ 1,686,356    $ 1,440,673
  Accrued compensation..............................      204,328        179,018         89,815
  Accrued clinical trial costs......................      796,861        690,885        810,144
  Deferred research contract revenue................      806,359        809,359         70,860
                                                      -----------    -----------    -----------
Total current liabilities...........................    3,177,131      3,365,618      2,411,492
Stockholders' equity:
  Common Stock, $0.01 par value:
     Authorized shares -- 30,000,000 at December 31,
       1996 and 1997 and March 31, 1998
     Issued and outstanding shares -- 7,320,089 at
       December 31, 1996, 7,401,273 at December 31,
       1997 and 7,601,273 at March 31, 1998.........       73,201         74,013         76,013
  Additional paid-in capital........................   51,007,673     53,379,810     53,377,810
  Deficit accumulated during the development
     stage..........................................  (33,453,765)   (42,014,053)   (44,206,479)
                                                      -----------    -----------    -----------
Total stockholders' equity..........................   17,627,109     11,439,770      9,247,344
                                                      -----------    -----------    -----------
Total liabilities and stockholders' equity..........  $20,804,240    $14,805,388    $11,658,836
                                                      ===========    ===========    ===========
</TABLE>
 
See notes to consolidated financial statements.
                                       F-3
<PAGE>   55
 
                         GLIATECH INC. AND SUBSIDIARIES
                        (A DEVELOPMENT STAGE ENTERPRISE)
 
                     CONSOLIDATED STATEMENTS OF OPERATIONS
 
<TABLE>
<CAPTION>
                                                                                                                PERIOD FROM
                                                                                                               INCEPTION OF
                                                                                    THREE MONTHS ENDED          OPERATIONS
                                               YEAR ENDED DECEMBER 31,                   MARCH 31,           (AUGUST 31, 1988)
                                       ---------------------------------------   -------------------------   THROUGH MARCH 31,
                                          1995          1996          1997          1997          1998             1998
                                       -----------   -----------   -----------   -----------   -----------   -----------------
                                                                                        (UNAUDITED)             (UNAUDITED)
<S>                                    <C>           <C>           <C>           <C>           <C>           <C>
REVENUES
Research contracts and licensing
  fees...............................  $ 2,216,668   $ 2,854,860   $ 2,954,000   $   738,500   $   738,500     $  9,681,719
Product sales........................      182,233       900,932     1,536,440       344,656       511,500        3,217,445
Government grants....................      254,705       122,183       410,333        50,340       150,335        1,651,050
                                       -----------   -----------   -----------   -----------   -----------     ------------
Total revenues.......................    2,653,606     3,877,975     4,900,773     1,133,496     1,400,335       14,550,214
OPERATING COSTS AND EXPENSES
Research and development.............    5,107,154     6,119,533     6,952,247     1,854,929     2,253,014       36,251,333
Selling, general and
  administrative.....................    2,599,290     4,070,173     4,400,535     1,069,905     1,232,873       19,812,503
Depreciation and amortization........      170,395       166,411       292,746        64,913        86,848        1,824,383
Cost of product sales................      122,589       341,534       614,424       124,741       166,834        1,303,229
                                       -----------   -----------   -----------   -----------   -----------     ------------
Total operating costs and expenses...    7,999,428    10,697,651    12,259,952     3,114,488     3,739,569       59,191,448
                                       -----------   -----------   -----------   -----------   -----------     ------------
Loss from operations.................   (5,345,822)   (6,819,676)   (7,359,179)   (1,980,992)   (2,339,234)     (44,641,234)
Settlement of claim..................                               (2,025,000)                                  (2,025,000)
Interest income, net.................      359,961     1,120,121       823,891       236,812       146,808        3,398,777
                                       -----------   -----------   -----------   -----------   -----------     ------------
NET LOSS.............................  $(4,985,861)  $(5,699,555)  $(8,560,288)  $(1,744,180)  $(2,192,426)    $(43,267,457)
                                       ===========   ===========   ===========   ===========   ===========     ============
Basic and diluted net loss per common
  share..............................  $     (3.28)  $     (0.78)  $     (1.16)  $     (0.24)  $     (0.29)
                                       ===========   ===========   ===========   ===========   ===========
Shares used for purposes of computing
  basic and diluted net loss per
  common share.......................    1,518,955     7,313,230     7,354,124     7,333,162     7,451,273
                                       ===========   ===========   ===========   ===========   ===========
</TABLE>
 
See notes to consolidated financial statements.
                                       F-4
<PAGE>   56
 
                         GLIATECH INC. AND SUBSIDIARIES
                        (A DEVELOPMENT STAGE ENTERPRISE)
 
           CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY
<TABLE>
<CAPTION>
                                     CONVERTIBLE PREFERRED        CONVERTIBLE CLASS A
                                             STOCK                    COMMON STOCK               COMMON STOCK
                                    -----------------------   ----------------------------   ---------------------   ADDITIONAL
                                     NUMBER OF                NUMBER OF    PAR     CONTRA    NUMBER OF                 PAID-IN
                                      SHARES      PAR VALUE    SHARES     VALUE    ACCOUNT    SHARES     PAR VALUE     CAPITAL
                                    -----------   ---------   ---------   ------   -------   ---------   ---------   -----------
<S>                                 <C>           <C>         <C>         <C>      <C>       <C>         <C>         <C>
Balance at August 31, 1988........            0   $       0          0    $    0   $     0           0    $     0    $         0
Issuance of Redeemable Convertible
  Series A Preferred Stock at
  $1.44 per share.................    1,806,667      18,067                                                            2,583,535
Stock award of Convertible Class A
  Common Stock....................                             450,000     4,500    (1,683)
Accretion of Redeemable
  Convertible Series A Preferred
  Stock...........................                                                                                       111,200
Amortization of contra account....                                                     140
Net loss -- 1988..................
                                    -----------   ---------   --------    ------   -------   ---------    -------    -----------
Balance at December 31, 1988......    1,806,667      18,067    450,000     4,500    (1,543)          0          0      2,694,735
Accretion of Redeemable
  Convertible Series A Preferred
  Stock...........................                                                                                       448,422
Amortization of contra account....                                                     561
Net loss -- 1989..................
                                    -----------   ---------   --------    ------   -------   ---------    -------    -----------
Balance at December 31, 1989......    1,806,667      18,067    450,000     4,500      (982)          0          0      3,143,157
Issuance of Redeemable Convertible
  Series B Preferred Stock at
  $2.16 per share.................    1,467,593      14,676                                                            3,155,324
Accretion of Redeemable
  Convertible Series A Preferred
  Stock...........................                                                                                       379,400
Amortization of contra account....                                                     561
Net loss -- 1990..................
                                    -----------   ---------   --------    ------   -------   ---------    -------    -----------
Balance at December 31, 1990......    3,274,260      32,743    450,000     4,500      (421)          0          0      6,677,881
Issuance of Convertible Series B
  Preferred Stock at $2.16 per
  share, net of expense...........      615,741       6,157                                                            1,309,630
Exercise of stock options.........                                                              12,700        127          4,318
Amortization of contra account....                                                     421
Compensation related to grant of
  stock options...................                                                                                       130,250
Net loss -- 1991..................
                                    -----------   ---------   --------    ------   -------   ---------    -------    -----------
Balance at December 31, 1991......    3,890,001      38,900    450,000     4,500         0      12,700        127      8,122,079
Issuance of Convertible Series C
  Preferred Stock at $1.50 per
  share, net of expense...........    8,245,784      82,459                                                           12,237,689
Exercise of stock options.........                                                               2,000         20            680
Issuance of stock bonus...........                                                              18,000        180         67,320
Compensation related to grant of
  stock options...................                                                                                       116,740
Net loss -- 1992..................
                                    -----------   ---------   --------    ------   -------   ---------    -------    -----------
Balance at December 31, 1992......   12,135,785     121,359    450,000     4,500         0      32,700        327     20,544,508
Exercise of stock options.........                                                               2,630         26          3,295
Issuance of stock bonus...........                                                              18,200        182        136,318
Issuance of Common Stock..........                                                              22,000        220        164,780
Compensation related to grant of
  stock options...................                                                                                        (3,987)
Net loss -- 1993..................
                                    -----------   ---------   --------    ------   -------   ---------    -------    -----------
Balance at December 31, 1993......   12,135,785     121,359    450,000     4,500         0      75,530        755     20,844,914
 
<CAPTION>
                                                     DEFICIT
                                                   ACCUMULATED
                                                    DURING THE        TOTAL
                                      DEFERRED     DEVELOPMENT    STOCKHOLDERS'
                                    COMPENSATION      STAGE          EQUITY
                                    ------------   ------------   -------------
<S>                                 <C>            <C>            <C>
Balance at August 31, 1988........   $       0     $          0    $         0
Issuance of Redeemable Convertible
  Series A Preferred Stock at
  $1.44 per share.................                                   2,601,602
Stock award of Convertible Class A
  Common Stock....................                                       2,817
Accretion of Redeemable
  Convertible Series A Preferred
  Stock...........................                     (111,200)             0
Amortization of contra account....                                         140
Net loss -- 1988..................                     (294,123)      (294,123)
                                     ---------     ------------    -----------
Balance at December 31, 1988......           0         (405,323)     2,310,436
Accretion of Redeemable
  Convertible Series A Preferred
  Stock...........................                     (448,422)             0
Amortization of contra account....                                         561
Net loss -- 1989..................                     (802,926)      (802,926)
                                     ---------     ------------    -----------
Balance at December 31, 1989......           0       (1,656,671)     1,508,071
Issuance of Redeemable Convertible
  Series B Preferred Stock at
  $2.16 per share.................                                   3,170,000
Accretion of Redeemable
  Convertible Series A Preferred
  Stock...........................                     (379,400)             0
Amortization of contra account....                                         561
Net loss -- 1990..................                   (1,855,903)    (1,855,903)
                                     ---------     ------------    -----------
Balance at December 31, 1990......           0       (3,891,974)     2,822,729
Issuance of Convertible Series B
  Preferred Stock at $2.16 per
  share, net of expense...........                                   1,315,787
Exercise of stock options.........                                       4,445
Amortization of contra account....                                         421
Compensation related to grant of
  stock options...................     (81,250)                         49,000
Net loss -- 1991..................                   (2,829,868)    (2,829,868)
                                     ---------     ------------    -----------
Balance at December 31, 1991......     (81,250)      (6,721,842)     1,362,514
Issuance of Convertible Series C
  Preferred Stock at $1.50 per
  share, net of expense...........                                  12,320,148
Exercise of stock options.........                                         700
Issuance of stock bonus...........                                      67,500
Compensation related to grant of
  stock options...................     (29,413)                         87,327
Net loss -- 1992..................                   (4,080,101)    (4,080,101)
                                     ---------     ------------    -----------
Balance at December 31, 1992......    (110,663)     (10,801,943)     9,758,088
Exercise of stock options.........                                       3,321
Issuance of stock bonus...........                                     136,500
Issuance of Common Stock..........                                     165,000
Compensation related to grant of
  stock options...................      31,961                          27,974
Net loss -- 1993..................                   (5,913,836)    (5,913,836)
                                     ---------     ------------    -----------
Balance at December 31, 1993......     (78,702)     (16,715,779)     4,177,047
</TABLE>
 
                                       F-5
<PAGE>   57
 
                         GLIATECH INC. AND SUBSIDIARIES
                        (A DEVELOPMENT STAGE ENTERPRISE)
 
   CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY -- (CONTINUED)
<TABLE>
<CAPTION>
                                     CONVERTIBLE PREFERRED        CONVERTIBLE CLASS A
                                             STOCK                    COMMON STOCK               COMMON STOCK
                                    -----------------------   ----------------------------   ---------------------   ADDITIONAL
                                     NUMBER OF                NUMBER OF    PAR     CONTRA    NUMBER OF                 PAID-IN
                                      SHARES      PAR VALUE    SHARES     VALUE    ACCOUNT    SHARES     PAR VALUE     CAPITAL
                                    -----------   ---------   ---------   ------   -------   ---------   ---------   -----------
<S>                                 <C>           <C>         <C>         <C>      <C>       <C>         <C>         <C>
Exercise of stock options.........                                                                 135          1            289
Issuance of Convertible Series D
  Preferred Stock and warrants at
  $1.50 per share, net of
  expense.........................    2,420,001      24,200                                                            3,402,228
Issuance of stock bonus...........                                                               6,598         66         49,434
Issuance of Common Stock..........                                                                 680          7          5,093
Issuance of Convertible Series E
  Preferred Stock and warrants at
  $1.50 per share, net of
  expense.........................    1,000,000      10,000                                                            1,479,500
Compensation related to grant of
  stock options...................                                                                                          (805)
Net loss -- 1994..................
                                    -----------   ---------   --------    ------   -------   ---------    -------    -----------
Balance at December 31, 1994......   15,555,786     155,559    450,000     4,500         0      82,943        829     25,780,653
Exercise of stock options.........                                                              13,850        139         34,499
Redemption of Common Stock........                                                              (4,040)       (40)       (30,295)
Issuance of Convertible Series F
  Preferred Stock at $1.85 per
  share, net of expense...........    2,702,703      27,027                                                            4,626,062
  Issuance of stock bonus.........                                                              12,092        120         90,567
Issuance of Common Stock..........                                                              12,061        121        102,390
Issuance of Common Stock in
  initial public offering, net of
  expenses........................                                                           2,300,000     23,000     19,646,134
Conversion of Preferred Stock and
  Class A Common Stock............  (18,258,489)   (182,586)  (450,000)   (4,500)            4,718,015     47,180        139,906
Exercise of stock warrants........                                                             162,944      1,629        498,372
Compensation related to grant of
  stock options...................                                                                                        (1,500)
Net loss -- 1995..................
                                    -----------   ---------   --------    ------   -------   ---------    -------    -----------
Balance at December 31, 1995......            0           0          0         0         0   7,297,865     72,978     50,886,788
Exercise of stock options.........                                                              12,175        122         91,191
Issuance of stock bonus...........                                                               6,088         61         51,688
Expenses of issuance of common
  stock...........................                                                                                       (21,954)
Exercise of stock warrants........                                                               3,961         40            (40)
Compensation related to grant of
  stock options...................
Net loss -- 1996..................
                                    -----------   ---------   --------    ------   -------   ---------    -------    -----------
Balance at December 31, 1996......            0           0          0         0         0   7,320,089     73,201     51,007,673
Exercise of stock options.........                                                              76,000        760        306,365
Issuance of stock bonus...........                                                               5,184         52         40,772
Settlement of claim...............                                                                                     2,025,000
Net loss -- 1997..................
                                    -----------   ---------   --------    ------   -------   ---------    -------    -----------
Balance at December 31, 1997......            0           0          0         0         0   7,401,273     74,013     53,379,810
Issuance of stock for settlement
  of claim (Unaudited)............                                                             200,000      2,000         (2,000)
Net loss (Unaudited)..............
                                    -----------   ---------   --------    ------   -------   ---------    -------    -----------
Balance at March 31, 1998
  (Unaudited).....................            0   $       0          0    $    0   $     0   7,601,273    $76,013    $53,377,810
                                    ===========   =========   ========    ======   =======   =========    =======    ===========
 
<CAPTION>
                                                     DEFICIT
                                                   ACCUMULATED
                                                    DURING THE        TOTAL
                                      DEFERRED     DEVELOPMENT    STOCKHOLDERS'
                                    COMPENSATION      STAGE          EQUITY
                                    ------------   ------------   -------------
<S>                                 <C>            <C>            <C>
Exercise of stock options.........                                         290
Issuance of Convertible Series D
  Preferred Stock and warrants at
  $1.50 per share, net of
  expense.........................                                   3,426,428
Issuance of stock bonus...........                                      49,500
Issuance of Common Stock..........                                       5,100
Issuance of Convertible Series E
  Preferred Stock and warrants at
  $1.50 per share, net of
  expense.........................                                   1,489,500
Compensation related to grant of
  stock options...................      27,699                          26,894
Net loss -- 1994..................                   (6,052,570)    (6,052,570)
                                     ---------     ------------    -----------
Balance at December 31, 1994......     (51,003)     (22,768,349)     3,122,189
Exercise of stock options.........                                      34,638
Redemption of Common Stock........                                     (30,335)
Issuance of Convertible Series F
  Preferred Stock at $1.85 per
  share, net of expense...........                                   4,653,089
  Issuance of stock bonus.........                                      90,687
Issuance of Common Stock..........                                     102,511
Issuance of Common Stock in
  initial public offering, net of
  expenses........................                                  19,669,134
Conversion of Preferred Stock and
  Class A Common Stock............                                           0
Exercise of stock warrants........                                     500,001
Compensation related to grant of
  stock options...................      27,892                          26,392
Net loss -- 1995..................                   (4,985,861)    (4,985,861)
                                     ---------     ------------    -----------
Balance at December 31, 1995......     (23,111)     (27,754,210)    23,182,445
Exercise of stock options.........                                      91,313
Issuance of stock bonus...........                                      51,749
Expenses of issuance of common
  stock...........................                                     (21,954)
Exercise of stock warrants........                                           0
Compensation related to grant of
  stock options...................      23,111                          23,111
Net loss -- 1996..................                   (5,699,555)    (5,699,555)
                                     ---------     ------------    -----------
Balance at December 31, 1996......           0      (33,453,765)    17,627,109
Exercise of stock options.........                                     307,125
Issuance of stock bonus...........                                      40,824
Settlement of claim...............                                   2,025,000
Net loss -- 1997..................                   (8,560,288)    (8,560,288)
                                     ---------     ------------    -----------
Balance at December 31, 1997......           0      (42,014,053)    11,439,770
Issuance of stock for settlement
  of claim (Unaudited)............
Net loss (Unaudited)..............                   (2,192,426)    (2,192,426)
                                     ---------     ------------    -----------
Balance at March 31, 1998
  (Unaudited).....................   $       0     $(44,206,479)   $ 9,247,344
                                     =========     ============    ===========
</TABLE>
 
See notes to consolidated financial statements.
 
                                       F-6
<PAGE>   58
 
                         GLIATECH INC. AND SUBSIDIARIES
                        (A DEVELOPMENT STAGE ENTERPRISE)
 
                     CONSOLIDATED STATEMENTS OF CASH FLOWS
 
<TABLE>
<CAPTION>
                                                                                                                PERIOD FROM
                                                                                                               INCEPTION OF
                                                                                    THREE MONTHS ENDED          OPERATIONS
                                              YEAR ENDED DECEMBER 31,                    MARCH 31,           (AUGUST 31, 1988)
                                      ----------------------------------------   -------------------------   THROUGH MARCH 31,
                                         1995           1996          1997          1997          1998             1998
                                      -----------   ------------   -----------   -----------   -----------   -----------------
                                                                                        (UNAUDITED)             (UNAUDITED)
<S>                                   <C>           <C>            <C>           <C>           <C>           <C>
OPERATING ACTIVITIES
Net loss............................  $(4,985,861)  $ (5,699,555)  $(8,560,288)  $(1,744,180)  $(2,192,426)    $(43,267,457)
Adjustments to reconcile net loss to
  net cash used in operating
  activities:
  Depreciation and amortization.....      170,395        166,411       292,746        64,913        86,848        1,824,383
  Patent cost write-off.............       27,000        277,889        48,668        50,000        24,998          532,740
  Loss on disposal of equipment.....                                                                                102,000
  Compensation from issuance of
    stock and stock options.........       72,303         23,111                                                    286,609
  Settlement of claim...............                                 2,025,000                                    2,025,000
  Changes in operating assets and
    liabilities:
    Accounts receivable.............      (52,088)      (192,729)     (212,894)      (27,658)       54,250         (489,801)
    Inventories.....................       22,596         30,541       223,040         9,685      (396,408)        (560,486)
    Government grants receivable and
      other assets..................     (148,809)        61,834      (201,228)      (71,138)       31,098         (464,695)
    Accounts payable and other
      accrued expenses..............      152,491        327,822       316,773       302,412      (334,886)       1,344,799
    Deferred contract research
      revenue.......................   (1,235,414)       527,264         3,000      (738,500)     (738,499)          70,860
    Other liabilities...............     (213,808)       610,303       (90,462)       88,273       119,259        1,432,593
                                      -----------   ------------   -----------   -----------   -----------     ------------
Net cash used in operating
  activities........................   (6,191,195)    (3,867,109)   (6,155,645)   (2,066,193)   (3,345,766)     (37,163,455)
INVESTING ACTIVITIES
Sale (purchase) of short-term
  investments, net..................    1,708,221     (6,632,281)    2,934,746     2,857,461       595,399       (5,345,077)
Payment for patent rights and
  trademarks........................     (144,622)      (114,629)     (186,812)      (49,002)      (56,926)      (1,429,483)
Payment of organization costs.......                                                                               (139,779)
Purchase of property and
  equipment.........................     (151,609)      (715,153)     (418,563)      (69,471)      (97,068)      (2,496,631)
                                      -----------   ------------   -----------   -----------   -----------     ------------
Net cash provided by (used in)
  investing activities..............    1,411,990     (7,462,063)    2,329,371     2,738,988       441,405       (9,410,970)
FINANCING ACTIVITIES
Payment of demand note from bank....                    (400,000)
Principal payments on capital lease
  obligations.......................      (43,228)                                                                 (565,601)
Proceeds from sale and leaseback....                                                                                 75,131
Proceeds from issuance of Preferred
  Stock, net........................    4,653,089                                                                28,976,554
Proceeds from issuance of Common
  Stock, net........................   19,669,134        (21,954)                                                19,817,280
Proceeds from exercise of stock
  options...........................       60,903         91,313       307,125       157,750                        468,097
Proceeds from exercise of
  warrants..........................      500,001                                                                   500,001
                                      -----------   ------------   -----------   -----------   -----------     ------------
Net cash provided by (used in)
  financing activities..............   24,839,899       (330,641)      307,125       157,750                     49,271,462
                                      -----------   ------------   -----------   -----------   -----------     ------------
Increase (decrease) in cash and cash
  equivalents.......................   20,060,694    (11,659,813)   (3,519,149)      830,545    (2,904,361)       2,697,037
Cash and cash equivalents at
  beginning of year/period..........      719,666     20,780,360     9,120,547     9,120,547     5,601,398
                                      -----------   ------------   -----------   -----------   -----------     ------------
CASH AND CASH EQUIVALENTS AT END OF
  YEAR/PERIOD.......................  $20,780,360   $  9,120,547   $ 5,601,398   $ 9,951,092   $ 2,697,037     $  2,697,037
                                      ===========   ============   ===========   ===========   ===========     ============
</TABLE>
 
See notes to consolidated financial statements.
                                       F-7
<PAGE>   59
 
                         GLIATECH INC. AND SUBSIDIARIES
                        (A DEVELOPMENT STAGE ENTERPRISE)
 
                   NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
 
                  YEARS ENDED DECEMBER 31, 1995, 1996 AND 1997
             THREE MONTHS ENDED MARCH 31, 1997 AND 1998 (UNAUDITED)

A. BACKGROUND AND ACCOUNTING POLICIES
 
BACKGROUND
 
     Gliatech Inc. and its wholly-owned subsidiaries (the "Company" or
"Gliatech") are engaged in the research, development and commercialization of
proprietary, resorbable, carbohydrate, polymer medical devices designed to
inhibit surgical scarring and adhesions. In addition, Gliatech is pursuing the
development of small molecule drug candidates for the treatment of certain
central nervous system disorders, including Attention Deficit Hyperactive
Disorder, sleep disorders, obesity, anxiety and Alzheimer's Disease. Gliatech
began operations on August 31, 1988 and is currently in the development stage,
as operations consist primarily of research and development expenditures, and
significant revenues from planned principal operations have not yet been
realized. Product sales consist of sales of Gliatech's first two medical device
products, ADCON-L and ADCON-T/N, primarily to independent distributors in
Europe, Australia and New Zealand. The Company recognizes revenue from product
sales upon shipment.
 
     The consolidated financial statements reflect the financial position and
results of operations of Gliatech and its wholly-owned subsidiaries.
Intercompany balances and transactions have been eliminated.
 
CASH AND CASH EQUIVALENTS
 
     The Company considers all highly liquid investments with a maturity of
three months or less when purchased to be cash equivalents. The carrying amount
of the Company's cash equivalents approximates fair value due to the short
maturity of those investments. Cash equivalents are primarily in commercial
paper.
 
SHORT-TERM INVESTMENTS
 
     The Company's short-term investments, all of which are classified as
available-for-sale, consist primarily of corporate bonds. Such investments are
stated at cost, which approximates fair value due to the short-term maturities
of these securities.
 
INVENTORIES
 
     Inventories are stated at the lower of cost or market and are valued using
the first-in, first-out method.
 
PROPERTY AND EQUIPMENT
 
     Property and equipment are stated at cost. Laboratory and office equipment
and leasehold improvements are depreciated on the straight-line basis over the
shorter of the lease period or the estimated useful lives (5 to 10 years).
 
PATENT RIGHTS AND TRADEMARKS
 
     Patent rights are amortized on the straight-line basis over the shorter of
the estimated useful life of the patented technology or the useful life of the
patent, beginning at the time the patent is granted. Costs associated with
patents that are abandoned are expensed at the date of abandonment. Trademark
costs are amortized on the straight-line basis over the estimated useful life of
the trademark, beginning at the time the trademark is granted.
 
GOVERNMENT GRANTS
 
     Revenues from government grants are recognized ratably over the period of
the grant.
 
                                       F-8
<PAGE>   60
                         GLIATECH INC. AND SUBSIDIARIES
                        (A DEVELOPMENT STAGE ENTERPRISE)
 
            NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- CONTINUED
 
A. BACKGROUND AND ACCOUNTING POLICIES -- CONTINUED
RESEARCH CONTRACTS AND LICENSING FEE REVENUE
 
     Revenue from the research collaboration agreements are recorded when earned
as defined under the terms of the agreements. Periodic research funding payments
received which are related to future performance are deferred and recognized as
income when earned. Licensing fees and other milestone payments are recognized
as income when earned.
 
INCOME TAXES
 
     Effective January 1, 1993, the Company adopted Statement of Financial
Accounting Standards ("SFAS") No. 109, Accounting for Income Taxes. Under SFAS
No. 109, the liability method is used in accounting for income taxes. Under this
method, deferred tax assets and liabilities are determined based on differences
between financial reporting and tax bases of assets and liabilities and are
measured using the currently enacted tax rates and laws that will be in effect
when the differences are expected to reverse. Prior to the adoption of SFAS No.
109, income tax expense was determined using the deferred method prescribed by
Accounting Principles Board Opinion ("APBO") No. 11, Accounting for Income
Taxes.
 
BASIC AND DILUTED NET LOSS PER COMMON SHARE
 
     In 1997, the Financial Accounting Standards Board ("FASB") issued SFAS No.
128, Earnings per Share. SFAS No. 128 replaced the calculation of primary and
fully diluted earnings per share with basic and diluted earnings per share.
Unlike primary earnings per share, basic earnings per share excludes any
dilutive effects of options and warrants. Diluted earnings per share is very
similar to the previously reported fully diluted earnings per share. On February
3, 1998, the Securities and Exchange Commission issued Staff Accounting Bulletin
("SAB") No. 98 which, among other things, supersedes SAB No. 83 regarding the
computation of earnings per share in connection with a company's initial public
offering (the "IPO") of common stock and requires conformity with SFAS No. 128.
SAB No. 83 was used by the Company in computing its pro forma net loss per share
prior to its IPO that occurred in October 1995, whereby common and common
equivalent shares, including preferred stock (all of which converted upon the
completion of the IPO) issued by the Company prior to the IPO were included in
the calculation of the shares used in computing pro forma net loss per share,
even if they were anti-dilutive, which differs from the requirement of SFAS No.
128.
 
     Basic and diluted net loss per common share for 1995 and 1996 have been
restated to conform to SFAS No. 128 and SAB No. 98 requirements. Basic and
diluted net loss per common share is based on the weighted average number of
common shares outstanding. For 1995, 90,000 common equivalent shares relating to
convertible Class A common stock were assumed to be outstanding for the entire
year since such shares were issued for a nominal amount. Outstanding common
equivalent shares relating to stock options and warrants and convertible
preferred stock outstanding prior to the IPO are excluded as their effect is
anti-dilutive.
 
STOCK-BASED COMPENSATION
 
     The Company accounts for stock-based compensation in accordance with APBO
No. 25, Accounting for Stock Issued to Employees.
 
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 amounts reported in the financial statements and
accompanying notes. Actual results could differ from those estimates.
 
                                       F-9
<PAGE>   61
                         GLIATECH INC. AND SUBSIDIARIES
                        (A DEVELOPMENT STAGE ENTERPRISE)
 
            NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- CONTINUED
 
A. BACKGROUND AND ACCOUNTING POLICIES -- CONTINUED
NEW PRONOUNCEMENTS
 
     In June 1997, the FASB issued SFAS No. 131, Disclosures about Segments of
an Enterprise and Related Information. This statement establishes standards for
reporting financial and descriptive information about operating segments. Under
SFAS No. 131, information pertaining to the Company's operating segments will be
reported on the basis that is used internally for evaluating segment performance
and making resource allocation determinations. Management is currently studying
the potential effects of adoption of this statement, which is required in 1998.
 
B. INVENTORIES
 
     Inventories consist of:
 
<TABLE>
<CAPTION>
                                                         DECEMBER 31,        MARCH 31,
                                                      -------------------   -----------
                                                        1996       1997        1998
                                                      --------   --------   -----------
                                                                            (UNAUDITED)
<S>                                                   <C>        <C>        <C>
Raw materials.......................................  $129,095   $ 36,755     $448,129
Work in process.....................................   196,502     71,572       39,755
Finished goods......................................    61,521     55,751       72,602
                                                      --------   --------     --------
                                                      $387,118   $164,078     $560,486
                                                      ========   ========     ========
</TABLE>
 
     As of December 31, 1997, the Company had purchase commitments of $387,000
for inventory.
 
C. PROPERTY AND EQUIPMENT
 
     Property and equipment consist of:
 
<TABLE>
<CAPTION>
                                                     DECEMBER 31,          MARCH 31,
                                                -----------------------   -----------
                                                   1996         1997         1998
                                                ----------   ----------   -----------
                                                                          (UNAUDITED)
<S>                                             <C>          <C>          <C>
Laboratory equipment..........................  $1,138,398   $1,213,267   $ 1,258,354
Office equipment..............................     410,583      485,674       537,655
Leasehold improvements........................     782,782    1,051,385     1,051,385
                                                ----------   ----------   -----------
                                                 2,331,763    2,750,326     2,847,394
Accumulated depreciation and amortization.....  (1,202,092)  (1,472,807)   (1,553,580)
                                                ----------   ----------   -----------
Property and equipment, net...................  $1,129,671   $1,277,519   $ 1,293,814
                                                ==========   ==========   ===========
</TABLE>
 
                                      F-10
<PAGE>   62
                         GLIATECH INC. AND SUBSIDIARIES
                        (A DEVELOPMENT STAGE ENTERPRISE)
 
            NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- CONTINUED
 
D. OTHER ASSETS
 
     Other assets consist of:
 
<TABLE>
<CAPTION>
                                                         DECEMBER 31,        MARCH 31,
                                                      -------------------   -----------
                                                        1996       1997        1998
                                                      --------   --------   -----------
                                                                            (UNAUDITED)
<S>                                                   <C>        <C>        <C>
Patent rights, net of accumulated amortization of
  $60,712 at December 31, 1996, $82,744 at December
  31, 1997 and $88,819 at March 31, 1998............  $605,385   $718,973     $744,898
Trademark costs, net................................    56,810     59,503       59,530
Other...............................................    13,764     13,596       13,497
                                                      --------   --------     --------
                                                      $675,959   $792,072     $817,925
                                                      ========   ========     ========
</TABLE>
 
E. FINANCING ARRANGEMENTS
 
     The Company has an unsecured line of credit that provides for borrowings up
to $1,500,000 at an interest rate of 1% above the bank's insured money market
savings account rate. No borrowings were outstanding at December 31, 1996 and
1997.
 
     Rent expense relating to the operating lease of office space was
approximately $234,000, $297,000 and $318,000 in 1995, 1996 and 1997,
respectively. Future annual minimum lease commitments at December 31, 1997 are
as follows:
 
<TABLE>
<S>                                                           <C>
1998........................................................  $  385,239
1999........................................................     416,498
2000........................................................     416,498
2001........................................................     416,498
                                                              ----------
Total                                                         $1,634,733
                                                              ==========
</TABLE>
 
F. INCOME TAXES
 
     At December 31, 1997, the Company has net operating loss carryforwards of
approximately $17.5 million for income tax purposes. In addition, the Company
has approximately $2.2 million in research and development tax credit
carryforwards. Such losses and credit carryforwards may be used to reduce future
tax liabilities and expire at various dates between 2003 and 2012. The Company
has offset the tax benefit of the net operating loss and tax credit
carryforwards and other deferred tax assets with a valuation allowance as
realization of the benefits is not assured. The valuation allowance increased by
$2,203,000 and $3,088,000 during the years ended December 31, 1996 and 1997,
respectively.
 
                                      F-11
<PAGE>   63
                         GLIATECH INC. AND SUBSIDIARIES
                        (A DEVELOPMENT STAGE ENTERPRISE)
 
            NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- CONTINUED
 
F. INCOME TAXES -- CONTINUED
     The Company's net deferred tax assets and liabilities consist of the
following:
 
<TABLE>
<CAPTION>
                                                                 DECEMBER 31,
                                                          ---------------------------
                                                              1996           1997
                                                          ------------   ------------
<S>                                                       <C>            <C>
Deferred tax liabilities................................  $   (217,000)  $   (232,000)
Deferred tax assets:
  Amortization of capitalized research and development
     expenses for tax...................................     5,100,000      6,256,000
  Research and development tax credit carryforwards.....     1,883,000      2,170,000
  Net operating tax loss carryforwards..................     5,038,000      5,966,000
  Other.................................................       271,000      1,003,000
                                                          ------------   ------------
Total deferred tax assets...............................    12,292,000     15,395,000
Valuation allowance.....................................   (12,075,000)   (15,163,000)
                                                          ------------   ------------
Net deferred taxes......................................  $          0   $          0
                                                          ============   ============
</TABLE>
 
     Pursuant to the Tax Reform Act of 1986, the utilization of net operating
loss and research and development tax credit carryforwards for tax purposes may
be subject to an annual limitation if a cumulative change in ownership of more
than 50% occurs over a three-year period.
 
G. CAPITALIZATION
 
     On October 24, 1995, the Company consummated an IPO of 2,300,000 shares of
common stock at an initial public offering price of $9.50 per share (the
"Offering"). The Company received net proceeds from the Offering of
approximately $19,669,000. In connection with the Offering, an amendment to the
Company's Certificate of Incorporation was filed to effect a five-for-one
reverse stock split of each share of common stock. All share and per share
information in the accompanying financial statements and conversion ratios of
all series of Preferred Stock and Class A Common Stock were adjusted to reflect
the reverse split. Immediately prior to the consummation of the Offering, all
shares of Class A Common Stock and all series of Preferred Stock automatically
converted pursuant to the Company's Certificate of Incorporation at applicable
conversion rates into a total of 4,718,015 shares of common stock.
 
     After the conversion and immediately prior to the consummation of the
Offering, the Company filed a Restated Certificate of Incorporation which
authorized the issuance of 30,000,000 shares of common stock and 5,000,000
shares of Preferred Stock at $.01 par value.
 
     On July 1, 1997, the Company declared a dividend distribution of one right
(a "Right") for each outstanding share of Common Stock. The terms of the Rights
are set forth in a Rights Agreement, dated July 1, 1997, between the Company and
a rights agent. The Rights generally will become exercisable and allow a holder
to acquire Common Stock at a discounted price if a person or group acquires 15%
or more of the outstanding shares of Common Stock of the Company. The Company is
also subject to provisions of state law which will prohibit the Company from
engaging in any "business combination" with a person who, together with
affiliates and associates, owns 15% or more of the Company's Common Stock (an
"Interested Stockholder") for a period of three years following the date that
such person became an Interested Stockholder, unless the business combination is
approved in a prescribed manner or certain other requirements are satisfied.
 
     At December 31, 1997, 1,340,510 shares of common stock are reserved for
issuance under the stock option plans and 20,000 shares are reserved for
issuance under common stock warrants outstanding for $7.50 per share.
 
                                      F-12
<PAGE>   64
                         GLIATECH INC. AND SUBSIDIARIES
                        (A DEVELOPMENT STAGE ENTERPRISE)
 
            NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- CONTINUED
 
G. CAPITALIZATION -- CONTINUED
     Prior to April 1991 certain preferred stock issuances were mandatorily
redeemable, and accordingly, periodic accretion to the redemption price was
charged to the deficit accumulated during the development stage.
 
H. STOCK OPTION PLANS
 
     The Company has three stock-based compensation plans. The Company applies
APBO No. 25, Accounting for Stock Issued to Employees and related
Interpretations in accounting for its plans, which requires that for certain
options granted, the Company recognize as compensation expense the excess of the
deemed fair value for accounting purposes of the common stock over the exercise
price of the options. For the majority of options, no compensation cost has been
recognized. Had compensation cost for the Company's three stock-based
compensation plans been determined based on the fair value at the grant dates
for awards under those plans consistent with the method of SFAS No. 123,
Accounting for Stock-Based Compensation, the Company's net loss and net loss per
share would have increased to the pro forma amounts indicated below:
 
<TABLE>
<CAPTION>
                                                    YEAR ENDED DECEMBER 31,
                                            ---------------------------------------
                                               1995          1996          1997
                                            -----------   -----------   -----------
<S>                     <C>                 <C>           <C>           <C>
Net loss                As reported......   $(4,985,861)  $(5,699,555)  $(8,560,288)
                        Pro forma........   $(5,124,584)  $(6,351,247)  $(9,166,993)
Basic and diluted net
 loss per common share  As reported......   $     (3.28)  $      (.78)  $     (1.16)
                        Pro forma........   $     (3.37)  $      (.87)  $     (1.25)
</TABLE>
 
     The Company has a 1989 Stock Option Plan for employees and 1992 and 1995
Stock Option Plans for members of the Company's Board of Directors. These plans
provide for 1,270,000 shares to be issued to employees and 190,000 shares to be
issued to Directors. These options generally vest over a three or four year
period and become exercisable in part one year after date of grant and expire at
the end of ten years.
 
     For pro forma calculations, the fair value of each option grant is
estimated on the date of grant using the Black-Scholes option-pricing model with
the following weighted-average assumptions used for grants in 1995, 1996 and
1997:
 
<TABLE>
<CAPTION>
                                                         YEAR ENDED DECEMBER 31,
                                               -------------------------------------------
                                                   1995           1996           1997
                                               ------------   ------------   -------------
<S>                                            <C>            <C>            <C>
Expected volatility..........................      67%            67%             75%
Risk-free interest rates.....................   5.27-5.32%     5.32-6.49%     5.71-6.48%
Average expected life........................  4 or 5 years   4 or 5 years   4 or 5 years
</TABLE>
 
     At December 31, 1997, there were 230,335 options available for future
grant.
 
                                      F-13
<PAGE>   65
                         GLIATECH INC. AND SUBSIDIARIES
                        (A DEVELOPMENT STAGE ENTERPRISE)
 
            NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- CONTINUED
 
H. STOCK OPTION PLANS -- CONTINUED
     A summary of the status of the Company's three stock option plans as of
December 31, 1995, 1996 and 1997 and changes during the years then ended is
presented below:
 
<TABLE>
<CAPTION>
                                               1995                  1996                   1997
                                        -------------------   -------------------   ---------------------
                                                  WEIGHTED-             WEIGHTED-               WEIGHTED-
                                                   AVERAGE               AVERAGE                 AVERAGE
                                                  EXERCISE              EXERCISE                EXERCISE
                                        SHARES      PRICE     SHARES      PRICE      SHARES       PRICE
                                        -------   ---------   -------   ---------   ---------   ---------
<S>                                     <C>       <C>         <C>       <C>         <C>         <C>
Outstanding at beginning of year......  326,700     $3.43     765,700     $6.34       978,375     $6.85
Granted...............................  464,700      8.22     247,800      8.53       225,300      9.46
Exercised.............................  (13,850)     2.50     (12,175)     7.50       (76,000)     4.04
Canceled..............................  (11,850)     3.87     (22,950)     7.75       (17,500)     8.14
                                        -------               -------               ---------
Outstanding at end of year............  765,700      6.34     978,375      6.85     1,110,175      7.56
                                        =======               =======               =========
Options exercisable at year-end.......  227,205               362,650                 491,692
  Weighted-average fair value of
     options granted during the
     year.............................              $4.92                 $5.15                   $6.12
</TABLE>
 
     The following table summarizes information about options outstanding at
December 31, 1997:
 
<TABLE>
<CAPTION>
                    OPTIONS OUTSTANDING                OPTIONS EXERCISABLE
           -------------------------------------   ----------------------------
                          WEIGHTED-
                           AVERAGE     WEIGHTED-
RANGE OF     NUMBER       REMAINING     AVERAGE      NUMBER        WEIGHTED-
EXERCISE   OUTSTANDING   CONTRACTUAL   EXERCISE    EXERCISABLE      AVERAGE
 PRICES    AT 12/31/97   LIFE (YRS)      PRICE     AT 12/31/97   EXERCISE PRICE
- --------   -----------   -----------   ---------   -----------   --------------
<S>        <C>           <C>           <C>         <C>           <C>
 $0-5         146,500        2.14       $ 1.00       146,500         $ 1.00
  5-10        804,475        8.05         8.10       334,672           8.05
 10-15        159,200        9.58        10.82        10,520          13.13
            ---------                                -------
            1,110,175                                491,692
            =========                                =======
</TABLE>
 
     In May 1991, all previously issued options with an exercise price of $0.70
were canceled and reissued at an exercise price of $0.35.
 
I. RESEARCH COLLABORATION AGREEMENTS
 
     In October 1994, the Company established a research and development
collaboration with Janssen Pharmaceutica, N.V. ("Janssen"), a wholly owned
subsidiary of Johnson & Johnson, for the discovery and development of compounds
suitable for the treatment of Alzheimer's Disease and other neurodegenerative
diseases. Under the terms of the agreements, the Company received an initial
licensing fee and Janssen will provide research funding over a three-year
research period, renewable for a fourth and fifth year. In addition, Janssen
will make milestone payments to the Company upon the achievement of development
and clinical benchmarks. The Company will receive a royalty on sales of marketed
products and Janssen will be responsible for all development costs, including
clinical trials and obtaining regulatory approval. Deferred revenue related to
these agreements was $806,359 and $809,359 at December 31, 1996 and 1997,
respectively. In October 1994, Johnson & Johnson Development Corporation made an
equity investment in the Company.
 
J. RESEARCH, CLINICAL TRIAL, CONSULTING AND LICENSE AGREEMENTS
 
     Since beginning operations, the Company has entered into research
agreements and clinical trial agreements with universities and third parties and
consulting agreements with scientific advisors. The research agreements
 
                                      F-14
<PAGE>   66
                         GLIATECH INC. AND SUBSIDIARIES
                        (A DEVELOPMENT STAGE ENTERPRISE)
 
            NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- CONTINUED
 
J. RESEARCH, CLINICAL TRIAL, CONSULTING AND LICENSE AGREEMENTS -- CONTINUED

require the Company to fund certain research activities, and are generally
renewable on an annual basis. In return, the Company has rights to obtain and
use exclusive licenses for the results of the research. Under license agreements
with various universities, ownership of all patents resulting from research
agreements will remain with the universities or researchers. The Company is
required to incur all costs associated with applying for and maintaining the
patents. The Company generally will obtain exclusive worldwide licensing rights
and is required to remit fixed percentages, as defined, of the net selling price
of licensed products and royalties received from sublicensees to the
universities and researchers. The clinical trial agreements require the Company
to fund the performance of specific clinical procedures and the cost of
administering the clinical trials.
 
     As of December 31, 1997, minimum commitments under research, clinical trial
and consulting agreements are $453,703 for 1998 ($1,162,827 at December 31,
1996).
 
K. LEGAL MATTERS
 
     In 1995, a dispute regarding inventorship of the ADCON products and the
rights of Case Western Reserve University ("CWRU") to receive royalties from
sales of ADCON products arose between the Company and CWRU. After extensive
discussions between the Company and CWRU, a complaint was filed by the Company
on September 8, 1997 in the United States District Court Northern District of
Ohio, Eastern Division ("Court") against CWRU and one of its employees,
requesting the Court to confirm that there was no error in the omission of the
employee as a named inventor of the Company's patents. The complaint was filed
in response to repeated statements to the Company and the general public made by
the employee and CWRU alleging that the inventorship of the patent was in error
because the employee was not named. The complaint did not seek monetary damages.
In March 1998, the suit was dismissed pursuant to the terms and conditions of a
Settlement Agreement between the Company and CWRU. As part of the Settlement
Agreement, the Company agreed to issue a total of 200,000 shares of common stock
to CWRU and the employee.
 
     As an agreement in principle had been reached between the Company and CWRU
in 1997, the Company recorded a charge of $2,025,000 based on the fair value of
the Company's common stock at that time. Since the dispute will be settled with
shares (issued in 1998), the Company has recorded the offset to the charge as a
component of stockholders' equity.
 
     The Company may from time to time be subject to various legal actions,
including patent and product liability related matters, arising in the normal
course of business. These matters are subject to various uncertainties, and it
is always possible that some of these matters may be decided unfavorably to the
Company.
 
NOTE L. INTERIM FINANCIAL INFORMATION (UNAUDITED)
 
     The consolidated balance sheet as of March 31, 1998, the related
consolidated statements of operations and cash flows for the three months ended
March 31, 1997 and 1998, and the statement of stockholders' equity for the three
months ended March 31, 1998 (interim financial statements) have been prepared by
the Company and are unaudited. The interim financial statements include all
adjustments, consisting of only normal recurring adjustments necessary for a
fair statement of the results of the interim periods. Certain information and
footnote disclosures normally included in financial statements prepared in
accordance with generally accepted accounting principles have been condensed or
omitted from the interim financial statements. The interim financial statements
should be read in conjunction with the Company's December 31, 1997 audited
consolidated financial statements appearing herein. The results for the three
months ended March 31, 1998 may not be indicative of operating results for the
full year.
 
                                      F-15
<PAGE>   67
 
======================================================
 
  NO DEALER, SALESPERSON OR ANY OTHER PERSON HAS BEEN AUTHORIZED TO GIVE ANY
INFORMATION OR MAKE ANY REPRESENTATION NOT CONTAINED IN THIS PROSPECTUS IN
CONNECTION WITH THE OFFER MADE BY THIS PROSPECTUS AND, IF GIVEN OR MADE, SUCH
INFORMATION OR REPRESENTATION MUST NOT BE RELIED UPON AS HAVING BEEN AUTHORIZED
BY THE COMPANY OR THE UNDERWRITERS. THIS PROSPECTUS DOES NOT CONSTITUTE AN OFFER
TO SELL OR A SOLICITATION OF AN OFFER TO BUY ANY SECURITIES OFFERED HEREBY BY
ANYONE IN ANY JURISDICTION IN WHICH SUCH OFFER OR SOLICITATION IS NOT AUTHORIZED
OR IN WHICH THE PERSON MAKING SUCH OFFER OR SOLICITATION IS NOT QUALIFIED TO DO
SO OR TO ANYONE TO WHOM IT IS UNLAWFUL TO MAKE SUCH OFFER OR SOLICITATION.
NEITHER THE DELIVERY OF THIS PROSPECTUS NOR ANY SALE MADE HEREUNDER SHALL, UNDER
ANY CIRCUMSTANCES, CREATE ANY IMPLICATION THAT THE INFORMATION HEREIN IS CORRECT
AS OF ANY TIME SUBSEQUENT TO THE DATE OF THIS PROSPECTUS OR THAT THERE HAS BEEN
NO CHANGE IN THE AFFAIRS OF THE COMPANY SINCE SUCH DATE.
 
                            ------------------------
 
                               TABLE OF CONTENTS
 
   
<TABLE>
<CAPTION>
                                        PAGE
                                        ----
<S>                                     <C>
Prospectus Summary....................     3
Risk Factors..........................     6
Use of Proceeds.......................    16
Price Range of Common Stock and
  Dividend Policy.....................    16
Capitalization........................    17
Dilution..............................    17
Selected Consolidated Financial
  Data................................    18
Management's Discussion and Analysis
  of Financial Condition and Results
  of Operations.......................    19
Business..............................    25
Management............................    45
Principal Stockholders................    47
Underwriting..........................    48
Legal Opinions........................    49
Experts...............................    49
Available Information.................    50
Incorporation of Certain Documents by
  Reference...........................    50
Index to Consolidated Financial
  Statements..........................   F-1
</TABLE>
    
 
======================================================
======================================================
                                2,000,000 SHARES
 
                                 GLIATECH LOGO
 
                                  COMMON STOCK
                          ---------------------------
                                   PROSPECTUS
                          ---------------------------
                                COWEN & COMPANY
 
                                  FURMAN SELZ
 
                        VECTOR SECURITIES INTERNATIONAL,
                                      INC.
 
                                            , 1998
======================================================
<PAGE>   68
 
                                    PART II
 
                     INFORMATION NOT REQUIRED IN PROSPECTUS
 
ITEM 14. OTHER EXPENSES OF ISSUANCE AND DISTRIBUTION.
 
     The following is a list of the estimated expenses to be incurred by the
Company in connection with the issuance and distribution of the Common Stock
being registered hereby, other than underwriting discounts and commissions.
 
   
<TABLE>
<S>                                                           <C>
Securities and Exchange Commission registration fee.........  $ 10,984
National Association of Securities Dealers, Inc. filing
  fee.......................................................     4,224
Nasdaq National Market subsequent listing fee...............    17,500
Printing costs..............................................   130,000*
Accounting fees and expenses................................    85,000*
Legal fees and expenses (not including Blue Sky)............   150,000*
Blue Sky fees and expenses..................................     5,000*
Miscellaneous expenses......................................     7,292
                                                              --------
     Total..................................................  $410,000
                                                              ========
</TABLE>
    
 
- ---------------
* Reflects estimates made by the Company.
 
ITEM 15. INDEMNIFICATION OF DIRECTORS AND OFFICERS.
 
     The Company's Second Restated Certificate of Incorporation ("Second
Restated Certificate") provides in Article Seventh that the Company will
indemnify its officers, directors and each person who is or was serving or who
had agreed to serve at the request of the Board of Directors or an officer of
the Company as an employee or agent of the Company or as a director, officer,
employee or agent of another corporation, partnership, joint venture, trust or
other enterprise to the full extent permitted by the General Corporation Law of
the State of Delaware (the "DGCL") or any other applicable laws as from time to
time may be in effect and that the Company may enter into agreements which
provide for indemnification greater or different from that provided in the
Second Restated Certificate. In addition, the Company has provided in Article
Eighth of its Second Restated Certificate that no director will be personally
liable to the Company or its stockholders for or with respect to any acts or
omissions in the performance of his or her duty as a director, to the full
extent permitted by the DGCL or any other applicable laws as from time to time
may be in effect. The Second Restated Certificate further provides that any
repeal or modification of Article Seventh or Article Eighth will not adversely
affect the right or protection existing under such provision prior to such
repeal or modification.
 
     Subsection (a) of Section 145 of the DGCL empowers a corporation to
indemnify any person who was or is a party or is threatened to be made a party
to any threatened, pending or completed action, suit or proceeding, whether
civil, criminal, administrative, or investigative (other than an action by or in
the right of the corporation) by reason of the fact that such person is or was a
director, officer, employee or agent of the corporation, or is or was serving at
the request of the corporation as a director, officer, employee or agent of
another corporation or enterprise, against expenses (including attorneys' fees),
judgments, fines and amounts paid in settlement actually and reasonably incurred
by such person in connection with such action, suit or proceeding if such person
acted in good faith and in a manner reasonably believed to be in or not opposed
to the best interests of the corporation, and, with respect to any criminal
action or proceeding, had no reasonable cause to believe such person's conduct
was unlawful.
 
     Subsection (b) of Section 145 of the DGCL empowers a corporation to
indemnify any person who was or is a party or is threatened to be made a party
to any threatened, pending or completed action or suit by or in the right of the
corporation to procure a judgment in its favor, by reason of the fact that such
person acted in any of the capacities set forth above, against expenses
(including attorneys' fees) actually and reasonably incurred by such person in
connection with the defense or settlement of such action or suit if such person
acted under standards similar to those set forth in the paragraph above, except
that no indemnification may be made in respect of any claim, issue or matter as
to which such person shall have been adjudged to be liable to the corporation,
unless and only to the extent that the Court of Chancery of the State of
Delaware or the court in which such action or suit
 
                                      II-1
<PAGE>   69
 
was brought shall determine that despite the adjudication of liability but in
view of all the circumstances of the case, such person is fairly and reasonably
entitled to be indemnified for such expenses which the court shall deem proper.
 
     Section 145 further provides that, to the extent that a director or officer
of a corporation has been successful on the merits or otherwise in defense of
any action, suit or proceeding referred to in subsections (a) and (b) of Section
145, or in defense of any claim, issue or matter therein, such person will be
indemnified against expenses (including attorneys' fees) actually and reasonably
incurred by such person in connection therewith; that any indemnification under
subsections (a) and (b) of Section 145 (unless ordered by a court) will be made
by a corporation only as authorized in the specific case upon a determination
that indemnification of the director, officer, employee or agent is proper in
the circumstances because such person has met the applicable standard of conduct
set forth in subsections (a) and (b) of Section 145; that expenses (including
attorney's fees) incurred by an officer or director in defending any civil,
criminal, administrative or investigative action, suit or proceeding may be paid
by the corporation in advance of the final disposition of such action, suit or
proceeding upon receipt of an undertaking by or on behalf of such director or
officer to repay such amount if it shall ultimately be determined that such
person is not entitled to be indemnified by the corporation; that
indemnification provided for by Section 145 will not be deemed exclusive of any
other rights to which the indemnified party may be entitled; and that a
corporation is empowered to purchase and maintain insurance on behalf of a
director or officer of the corporation against any liability asserted against
him and incurred by him in such capacity, or arising out of his status as such,
whether or not the corporation would have the power to indemnify him against
such liability under Section 145.
 
     The Company has entered into indemnity agreements (the "Indemnity
Agreements") with the current Directors and executive officers of the Company
and expects to enter into similar agreements with any Director or those
executive officers designed by the Board of Directors of the Company which may,
from time to time, be elected or appointed.
 
     Pursuant to the Indemnity Agreements, the Company will indemnify a Director
or officer of the Company (the "Indemnitee") if the Indemnitee is a party or is
threatened to be made a party to any threatened, pending or completed action,
suit or proceeding, whether civil, criminal, administrative or investigative, by
reason of the fact that the Indemnitee is or was a Director or officer of the
Company, or is or was serving at the request of the Company in certain
capacities with another entity, against any and all costs, charges and expenses,
judgments, fines and amounts paid in settlement actually and reasonably incurred
by the Indemnitee in connection with the defense or settlement of such
proceeding. Indemnity is available to the Indemnitee unless it is proved by
clear and convincing evidence that the Indemnitee's action or failure to act was
not in good faith and in a manner he reasonably believed to be in or not opposed
to the best interests of the Company.
 
     The Indemnity Agreements provide for advancement of expenses to the
Indemnitee if the Indemnitee provides the Company with a written undertaking
that (i) he has reasonably incurred or will reasonably incur actual expenses in
defending an actual civil, criminal, administrative or investigative action,
suit, proceeding or claim and (ii) he will repay such amount if it is ultimately
determined that he is not entitled to be indemnified by the Company.
 
     Reference is made to Section 6 of the Underwriting Agreement (Exhibit 1.1
to this Registration Statement) which provides for indemnification of the
Company's Directors and Officers by the Underwriters and Selling Stockholders
against certain civil liabilities, including liabilities under the Securities
Act of 1933.
 
                                      II-2
<PAGE>   70
 
ITEM 16. EXHIBITS AND FINANCIAL STATEMENT SCHEDULES.
 
     (a) Exhibits. The following Exhibits are filed herewith and made a part
hereof:
 
   
<TABLE>
<CAPTION>
EXHIBIT
NUMBER                     DESCRIPTION OF DOCUMENT
- -------                    -----------------------
<C>      <S>
   1.1   Form of Underwriting Agreement.
   4.1   Rights Agreement, dated as of July 1, 1997, by and between
         the Company and American Stock Transfer & Trust Company, as
         rights agent, is incorporated by reference to Exhibit 1 of
         the Company's Current report on Form 8-K as filed on July 2,
         1997 (File No. 0-20096).
   5.1   Opinion of Jones, Day, Reavis & Pogue as to the validity of
         the securities being offered.
  23.1   Consent of Jones, Day, Reavis & Pogue (included in Exhibit
         5.1).
  23.2   Consent of Ernst & Young LLP.
  23.3   Consent of Pennie & Edmonds LLP.
**24.1   Powers of Attorneys.
**24.2   Power of Attorney of William A. Clarke.
</TABLE>
    
 
   
** Previously filed.
    
 
     (b) Financial Statement Schedules
 
     None
 
ITEM 17. UNDERTAKINGS.
 
     The undersigned registrant hereby undertakes that, for purposes of
determining any liability under the Securities Act of 1933, each filing of the
registrant's annual report pursuant to Section 13(a) or 15(d) of the Securities
Exchange Act of 1934 (and, where applicable, each filing of an employee benefit
plan's annual report pursuant to Section 15(d) of the Securities Exchange Act of
1934) that is incorporated by reference in the registration statement shall be
deemed to be a new registration statement relating to the securities offered
therein, and the offering of such securities at that time shall be deemed to be
the initial bona fide offering thereof.
 
     Insofar as indemnification for liabilities arising under the Securities Act
of 1933 may be permitted to directors, officers and controlling persons of the
Registrant pursuant to the foregoing provisions, or otherwise, the Registrant
has been advised that in the opinion of the Securities and Exchange Commission
such indemnification is against public policy as expressed in the Act and is,
therefore, unenforceable. In the event that a claim for indemnification against
such liabilities (other than the payment by the Registrant of expenses incurred
or paid by a director, officer or controlling person of the Registrant in the
successful defense of any action, suit or proceeding) is asserted by such
director, officer or controlling person in connection with the securities being
registered, the Registrant will, unless in the opinion of its counsel the matter
has been settled by controlling precedent, submit to a court of appropriate
jurisdiction the question whether such indemnification by it is against public
policy as expressed in the Act and will be governed by the final adjudication of
such issue.
 
     The undersigned registrant hereby undertakes that:
 
          (1) For purposes of determining any liability under the Securities Act
     of 1933, the information omitted from the form of prospectus filed as part
     of this registration statement in reliance upon Rule 430A and contained in
     a form of prospectus filed by the registrant pursuant to Rule 424(b)(1) or
     (4) or 497(h) under the Securities Act of 1933 shall be deemed to be part
     of this registration statement as of the time it was declared effective.
 
          (2) For the purpose of determining any liability under the Securities
     Act of 1933, each post-effective amendment that contains a form of
     prospectus shall be deemed to be a new registration statement relating to
     the securities offered therein, and the offering of such securities at that
     time shall be deemed to be the initial bona fide offering thereof.
 
     The undersigned registrant hereby undertakes to deliver or cause to be
delivered with the prospectus, to each person to whom the prospectus is sent or
given, the latest annual report, to security holders that is incorporated by
reference in the prospectus and furnished pursuant to and meeting the
requirements of Rule 14a-3 or Rule 14c-3
 
                                      II-3
<PAGE>   71
 
under the Securities Exchange Act of 1934; and, where interim financial
information required to be presented by Article 3 of Regulation S-X is not set
forth in the prospectus, to deliver, or cause to be delivered to each person to
whom the prospectus is sent or given, the latest quarterly report that is
specifically incorporated by reference in the prospectus to provide such interim
financial information.
 
                                      II-4
<PAGE>   72
 
                                   SIGNATURES
 
   
     PURSUANT TO THE REQUIREMENTS OF THE SECURITIES ACT OF 1933, THE REGISTRANT
CERTIFIES THAT IT HAS REASONABLE GROUNDS TO BELIEVE THAT IT MEETS ALL OF THE
REQUIREMENTS FOR FILING ON FORM S-3 AND HAS DULY CAUSED THIS AMENDMENT NO. 2 TO
THE REGISTRATION STATEMENT TO BE SIGNED ON ITS BEHALF BY THE UNDERSIGNED,
THEREUNTO DULY AUTHORIZED, IN THE CITY OF CLEVELAND, STATE OF OHIO, ON JUNE 18,
1998.
    
 
                                          GLIATECH INC.
 
   
                                          By: /s/ THOMAS O. OESTERLING PH.D
    
                                            ------------------------------------
                                            Thomas O. Oesterling, Ph.D.
                                            President and Chief Executive
                                              Officer
 
   
     PURSUANT TO THE REQUIREMENTS OF THE SECURITIES ACT OF 1933, THIS AMENDMENT
NO. 2 TO THE REGISTRATION STATEMENT HAS BEEN SIGNED BY THE FOLLOWING PERSONS IN
THE CAPACITIES AND ON THE DATES INDICATED.
    
 
   
<TABLE>
<CAPTION>
                  SIGNATURE                                       TITLE                            DATE
                  ---------                                       -----                            ----
<S>                                                 <C>                                      <C>
/s/ THOMAS O. OESTERLING, PH.D.                     President and Chief Executive            June 18, 1998
- ---------------------------------------------       Officer (Principal Executive
Thomas O. Oesterling, Ph.D.                         Officer) and Director
 
*                                                   Vice President and Chief Financial       June 18, 1998
- ---------------------------------------------       Officer (Principal Financial and
Rodney E. Dausch                                    Accounting Officer)
 
*                                                   Chairman of the Board                    June 18, 1998
- ---------------------------------------------
Robert P. Pinkas
 
*                                                   Director                                 June 18, 1998
- ---------------------------------------------
William A. Clarke
 
*                                                   Director                                 June 18, 1998
- ---------------------------------------------
Thomas E. Haigler, Jr.
 
*                                                   Director                                 June 18, 1998
- ---------------------------------------------
Ronald D. Henriksen
 
*                                                   Director                                 June 18, 1998
- ---------------------------------------------
Irving S. Shapiro
 
*                                                   Director                                 June 18, 1998
- ---------------------------------------------
John L. Ufheil
</TABLE>
    
 
   
* The undersigned by signing his name hereto, does sign and execute this
  Amendment No. 2 to the Registration Statement pursuant to the Powers of
  Attorney executed by the above-named officers and directors of the Company,
  which are being filed herewith with the Securities and Exchange Commission on
  behalf of such officers and directors.
    
 
   
By: /s/ THOMAS O. OESTERLING, PH.D.
    
 
    --------------------------------
        Thomas O. Oesterling, Ph.D.
        Attorney-in-Fact
<PAGE>   73
 
                                 EXHIBIT INDEX
 
   
<TABLE>
<CAPTION>
EXHIBIT
NUMBER                     DESCRIPTION OF DOCUMENT
- -------                    -----------------------
<C>      <S>
   1.1   Form of Underwriting Agreement.
   4.1   Rights Agreement, dated as of July 1, 1997, by and between
         the Company and American Stock Transfer & Trust Company, as
         rights agent, is incorporated by reference to Exhibit 1 of
         the Company's Current report on Form 8-K as filed on July 2,
         1997 (File No. 0-20096).
   5.1   Opinion of Jones, Day, Reavis & Pogue as to the validity of
         the securities being offered.
  23.1   Consent of Jones, Day, Reavis & Pogue (included in Exhibit
         5.1).
  23.2   Consent of Ernst & Young LLP.
  23.3   Consent of Pennie & Edmonds LLP.
**24.1   Powers of Attorney.
**24.2   Power of Attorney of William A. Clarke.
</TABLE>
    
 
   
** Previously filed.
    

<PAGE>   1
                                                                     Exhibit 1.1



                                2,300,000 SHARES

                                  GLIATECH INC.

                                  COMMON STOCK

                             UNDERWRITING AGREEMENT
                             ----------------------




June __, 1998

COWEN & COMPANY
FURMAN  SELZ LLC
VECTOR SECURITIES INTERNATIONAL, INC. 
As Representatives of the several Underwriters
c/o Cowen & Company
Financial Square
New York,
New York 10005

Dear Sirs:

1.   INTRODUCTORY. Gliatech Inc., a Delaware corporation (the "Company"),
     proposes to sell, pursuant to the terms of this Agreement, to the several
     underwriters named in Schedule A hereto (the "Underwriters," or, each, an
     "Underwriter"), an aggregate of 2,000,000 shares of Common Stock, $.01 par
     value (the "Common Stock") of the Company. The aggregate of 2,000,000
     shares so proposed to be sold is hereinafter referred to as the "Firm
     Stock". The Company also proposes to sell to the Underwriters, upon the
     terms and conditions set forth in Section 3 hereof, up to an additional
     300,000 shares of Common Stock (the "Optional Stock"). The Firm Stock and
     the Optional Stock are hereinafter collectively referred to as the "Stock".
     Cowen & Company ("Cowen"), Furman Selz LLC and Vector Securities
     International, Inc. are acting as representatives of the several
     Underwriters and in such capacity are hereinafter referred to as the
     "Representatives".

2.   REPRESENTATIONS AND WARRANTIES OF THE COMPANY. The Company represents and
     warrants to, and agrees with, the several Underwriters that:

           a  A registration statement on Form S-3 (File No. 333-52825) in the
     form in which it became or becomes effective and also in such form as it
     may be when any post-effective amendment thereto shall become effective
     with respect to the Stock, including any preeffective prospectuses included
     as part of the registration statement as originally filed or as part of any
     amendment or supplement thereto, or filed pursuant to Rule 424 under the
     Securities Act of 1933, as amended (the "Securities Act"), and the rules
     and regulations (the "Rules and Regulations") of the Securities and
     Exchange Commission (the "Commission") thereunder, copies of which
     (including all documents incorporated by reference therein) have heretofore
     been delivered to you, has been carefully prepared by the Company in
     conformity with the requirements of the Securities Act and has been filed
     with the Commission under the Securities Act; one or more amendments to
     such registration statement, including in each case an amended preeffective
     prospectus, copies of which amendments (including all documents
     incorporated by reference therein), have heretofore been delivered to you,
     have been so prepared and filed. If it is contemplated, at the time this
     Agreement is executed, that a post-effective amendment to the registration
     statement will be filed and must be declared effective before the offering
     of the Stock may commence, the term "Registration Statement" as used in
     this Agreement means the registration statement as amended by said
     post-effective amendment. The term "Registration Statement" as used in this
     Agreement shall also include any registration statement relating to the
     Stock that is filed and declared effective pursuant to Rule 462(b) under
     the Securities Act. The term "Prospectus" as used in this Agreement means
     the prospectus in the form included in the Registration Statement, or, (A)
     if the prospectus included in the Registration Statement


<PAGE>   2
                                       2

     omits information in reliance on Rule 430A under the Securities Act and
     such information is included in a prospectus filed with the Commission
     pursuant to Rule 424(b) under the Securities Act, the term "Prospectus" as
     used in this Agreement means the prospectus in the form included in the
     Registration Statement as supplemented by the addition of the Rule 430A
     information contained in the prospectus filed with the Commission pursuant
     to Rule 424(b) and (B) if prospectuses that meet the requirements of
     Section 10(a) of the Securities Act are delivered pursuant to Rule 434
     under the Securities Act, then (i) the term "Prospectus" as used in this
     Agreement means the "prospectus subject to completion" (as such term is
     defined in Rule 434(g) under the Securities Act) as supplemented by (a) the
     addition of Rule 430A information or other information contained in the
     form of prospectus delivered pursuant to Rule 434(b)(2) under the
     Securities Act or (b) the information contained in the abbreviated term
     sheets described in Rule 434(b)(3) under the Securities Act, and (ii) the
     date of such prospectuses shall be deemed to be the date of the abbreviated
     term sheets. The term "Preeffective Prospectus" as used in this Agreement
     means the prospectus subject to completion in the form included in the
     Registration Statement at the time of the initial filing of the
     Registration Statement with the Commission, and as such prospectus shall
     have been amended from time to time prior to the date of the Prospectus.

     Any reference herein to any Preeffective Prospectus of the Prospectus shall
     be deemed to refer to and include the documents incorporated by reference
     therein pursuant to Form S-3 under the Securities Act, as of the date of
     such Preeffective Prospectus or Prospectus, as the case may be, and any
     reference to any amendment or supplement to any Preeffective Prospectus or
     the Prospectus shall be deemed to refer to and include any documents filed
     after such date under the Securities Exchange Act of 1934 (the "Exchange
     Act"), and so incorporated by reference.

           b  The Commission has not issued or threatened to issue any order
     preventing or suspending the use of any Preeffective Prospectus, and, at
     its date of issue, each Preeffective Prospectus conformed in all material
     respects with the requirements of the Securities Act and did not include
     any untrue statement of a material fact or omit to state a material fact
     required to be stated therein or necessary to make the statements therein,
     in light of the circumstances under which they were made, not misleading;
     and, when the Registration Statement becomes effective and at all times
     subsequent thereto up to and including each of the Closing Dates (as
     hereinafter defined), the Registration Statement and the Prospectus and any
     amendments or supplements thereto contained and will contain all material
     statements and information required to be included therein by the
     Securities Act and conformed and will conform in all material respects to
     the requirements of the Securities Act and neither the Registration
     Statement nor the Prospectus, nor any amendment or supplement thereto,
     included or will include any untrue statement of a material fact or omit to
     state any material fact required to be stated therein or necessary to make
     the statements therein, in light of the circumstances under which they were
     made, not misleading; provided, however, that the foregoing
     representations, warranties and agreements shall not apply to information
     contained in or omitted from any Preeffective Prospectus or the
     Registration Statement or the Prospectus or any such amendment or
     supplement thereto in reliance upon, and in conformity with, written
     information furnished to the Company by or on behalf of any Underwriter,
     directly or through you, specifically for use in the preparation thereof;
     there is no franchise, lease, contract, agreement or document required to
     be described in the Registration Statement or Prospectus or to be filed as
     an exhibit to the Registration Statement which is not described or filed
     therein as required; and all descriptions of any such franchises, leases,
     contracts, agreements or documents contained in the Registration Statement
     are accurate and complete descriptions of such documents in all material
     respects.

          c  Subsequent to the respective dates as of which information is 
     given in the Registration Statement and Prospectus, and except as set forth
     or contemplated in the Prospectus, neither the Company nor any of its
     subsidiaries has incurred any liabilities or obligations, direct or
     contingent, nor entered into any transactions not in the ordinary course of
     business, and there has not been any material adverse change in the
     condition (financial or otherwise), properties, business, management,
     prospects, net worth or results of operations of the Company and its
     subsidiaries considered as a whole, or any change in the capital stock,
     short-term or long-term debt of the Company and its subsidiaries considered
     as a whole.

           d  The financial statements, together with the related notes and
     schedules, set forth in the Prospectus and elsewhere in the Registration
     Statement fairly present, on the basis stated in the Registration
     Statement, the financial position and the results of operations and changes
     in financial position of the Company and its

<PAGE>   3
                                       3


     consolidated subsidiaries at the respective dates or for the respective
     periods therein specified. Such statements and related notes and schedules
     have been prepared in accordance with generally accepted accounting
     principles applied on a consistent basis except as may be set forth in the
     Prospectus. The selected financial and statistical data set forth in the
     Prospectus under the caption "Selected Consolidated Financial Data" and in
     the Company's Annual Report on form 10-K for the fiscal year ended December
     31, 1997 fairly present, on the basis stated in the Registration Statement
     and such Annual Report, the information set forth therein.

           e  Ernst & Young LLP, who have expressed their opinions on the
     audited financial statements and related schedules included in the
     Registration Statement and the Prospectus are independent public
     accountants as required by the Securities Act and the Rules and
     Regulations.

   
           f  The Company has, and each of its subsidiaries have, been duly
     organized and are validly existing and in good standing as corporations
     under the laws of their respective jurisdictions of organization, with
     power and authority (corporate and other) to own or lease their properties
     and to conduct their businesses as described in the Prospectus; and the
     Company is and each of such subsidiaries are duly qualified to do business
     and in good standing as foreign corporations in all other jurisdictions
     where their ownership or leasing of properties or the conduct of their
     businesses requires such qualification, except where the failure to so
     qualify would not have a material adverse effect on the condition
     (financial or otherwise), properties, business, management, prospects, net
     worth or results of operations of the Company and its subsidiaries
     considered as a whole. The Company and its subsidiaries now hold and at
     each of the Closing Dates will hold, licenses, consents, certificates,
     orders, approvals and permits from all state, United States, foreign and
     other governmental or regulatory authorities, including, but not limited
     to, the United States Food and Drug Administration (the "FDA") and any
     foreign governmental or regulatory authorities performing functions similar
     to those performed by the FDA, that are required for the conduct of the
     business of the Company and its subsidiaries as such business is currently
     conducted as described in the Registration Statement and the Prospectus,
     except for such licenses, certificates, orders, approvals and permits the
     failure of which to maintain would not have a material adverse effect on
     the condition (financial or otherwise), properties, business, management,
     prospects, net worth or results of operations of the Company and its
     subsidiaries considered as a whole, all of which are valid and in full
     force and effect (and there is no proceeding pending or, to the knowledge
     of the Company, threatened which may cause any such license, consent,
     certificate, order, approval or permit to be withdrawn, canceled, suspended
     or not renewed). All of the descriptions contained in the Registration
     Statement and the Prospectus of the legal and governmental proceedings by
     or before the FDA or any foreign, state or local government body exercising
     comparable authority are accurate in all material respects. The Company and
     its subsidiaries are in compliance in all material respects with all
     applicable FDA, state and local rules, regulations, guidelines and
     policies, including, without limitation, applicable FDA, state and local
     rules, regulations and policies relating to good manufacturing practice and
     good laboratory practice and any foreign governmental or regulatory
     authorities performing functions similar to those performed by the FDA
     except for those which, singly or in the aggregate, would not have a
     material adverse effect on the condition (financial or otherwise) of
     properties, business, management, prospects, net worth or results of
     operations of the Company and its subsidiaries considered as a whole. The
     Company owns or controls, directly or indirectly, only the following
     corporations, associations or other entities: Gliatech R&D, Inc. and GIC,
     Inc.
    

           g  The Company's authorized and outstanding capital stock is on the
     date hereof, and will be on the Closing Dates, as set forth under the
     heading "Capitalization" in the Prospectus; the outstanding shares of
     common stock (including the outstanding shares of Stock) of the Company
     conform to the description thereof in the Prospectus and have been duly
     authorized and validly issued and are fully paid and nonassessable; are
     duly designated for quotation on the Nasdaq National Market and have been
     issued in compliance with all federal and state securities laws and were
     not issued in violation of or subject to any preemptive rights or similar
     rights to subscribe for or purchase securities and conform to the
     description thereof contained in the Prospectus, if applicable. Except as
     disclosed in and or contemplated by the Prospectus and the financial
     statements of the Company and related notes thereto included in the
     Prospectus, the Company does not have outstanding any options or warrants
     to purchase, or any preemptive rights or other rights to subscribe for or
     to purchase any securities or obligations convertible into, or any
     contracts or commitments to issue or sell, shares of its capital stock or
     any such options, rights, convertible securities or obligations, except for
     options granted subsequent to the date of information provided in the
     Prospectus pursuant to the Company's employee and stock option plans as
     disclosed in the Prospectus. All outstanding shares of capital stock of
     each subsidiary have been duly authorized and validly issued, and are fully
     paid and nonassessable and (except for directors' qualifying shares) are
     owned directly by the Company free and clear of any liens, encumbrances,
     equities or claims.

<PAGE>   4
                                       4



           h  The Stock to be issued and sold by the Company to the Underwriters
     hereunder has been duly and validly authorized and, when issued and
     delivered against payment therefor as provided herein, will be duly and
     validly issued, fully paid and nonassessable and free of any preemptive or
     similar rights and will conform to the description thereof in the
     Prospectus.

           i  Except as set forth in the Prospectus, there are no legal or
     governmental proceedings pending to which the Company or any of its
     subsidiaries or affiliates is a party or of which any property of the
     Company or any subsidiary or affiliate is subject, which, if determined
     adversely to the Company or any such subsidiary or affiliate, might
     individually or in the aggregate (i) prevent or adversely affect the
     transactions contemplated by this Agreement, (ii) suspend the effectiveness
     of the Registration Statement, (iii) prevent or suspend the use of the
     Preeffective Prospectus in any jurisdiction or (iv) result in a material
     adverse change in the condition (financial or otherwise), properties,
     business, management, prospects, net worth or results of operations of the
     Company and its subsidiaries considered as a whole and there is no valid
     basis for any such legal or governmental proceeding; and except as set
     forth in the Prospectus, to the best of the Company's knowledge no such
     proceedings are threatened or contemplated against the Company or any
     subsidiary or affiliate by governmental authorities or others. The Company
     is not a party nor subject to the provisions of any material injunction,
     judgment, decree or order of any court, regulatory body or other
     governmental agency or body. 

           j  The execution, delivery and performance of this Agreement and the
     consummation of the transactions herein contemplated (A) will not result in
     any violation of the provisions of the certificate of incorporation,
     by-laws or other organizational documents of the Company or its subsidiary,
     or any law, order, rule or regulation of any court or governmental agency
     or body having jurisdiction over the Company or its subsidiary or any of
     its their properties or assets, (B) will not conflict with or result in a
     breach or violation of any of the terms or provisions of or constitute a
     default under any indenture, mortgage, deed of trust, loan agreement or
     other agreement or instrument to which the Company or any of its
     subsidiaries is a party or by which it or any of its properties is or may
     be bound, the Second Restated Certificate of Incorporation, Amended and
     Restated By-laws or other organizational documents of the Company or any of
     its subsidiaries, or (C) will not result in any violation of any law,
     order, rule, regulation, writ, injunction, judgment or decree of any court
     or governmental agency or body to which the Company or any of its
     subsidiaries is subject, including, but not limited to, the FDA and any
     foreign, state or local governmental or regulatory authorities performing
     functions similar to those performed by the FDA.

           k  No consent, approval, authorization or order of any court or
     governmental agency or body is required for the execution, delivery and
     performance of this Agreement by the Company and the consummation of the
     transactions contemplated hereby, except such as may be required by the
     National Association of Securities Dealers, Inc. (the "NASD") or under the
     Securities Act or the Exchange Act or securities or "Blue Sky" laws of any
     jurisdiction in connection with the purchase and distribution of the Stock
     by the Underwriters. 

           l  The Company has the full corporate power and authority to enter
     into this Agreement and to perform its obligations hereunder (including to
     issue, sell and deliver the Stock), and this Agreement has been duly and
     validly authorized, executed and delivered by the Company and is a valid
     and binding obligation of the Company, enforceable against the Company in
     accordance with its terms, except to the extent that rights to indemnity
     and contribution hereunder may be limited by federal or state securities
     laws or the public policy underlying such laws and except that such is
     subject to bankruptcy, insolvency, reorganization, moratorium, fraudulent
     conveyance and other laws now or hereafter in effect relating to or
     limiting creditors' rights, and general principles of equity, whether such
     enforceability is considered in a proceeding in equity or at law, and to
     the discretion of the court before which any proceeding is brought. 

   
           m  The Company and its subsidiaries are in all material respects in
     compliance with, and conducts their businesses in conformity with, (i) all
     applicable federal, state, local and foreign laws, rules and regulations or
     any court or governmental agency or body including, but not limited to, the
     FDA and any foreign, state, or local governmental or regulatory authorities
     performing functions similar to those performed by the FDA and (ii) all
     laws, rules and regulations applicable to the import and export of the
     Company's and any subsidiary's products; to the knowledge of the Company,
     otherwise than as set forth in the Registration Statement and the
     Prospectus, no prospective change in any of such federal or state laws,
     rules or regulations has been adopted which, when made effective, would
     have a material adverse effect on the operations of the Company and its
     subsidiaries. Except as disclosed in the Registration Statement, the
     Company and its subsidiaries are in compliance with all applicable 
    

<PAGE>   5
                                       5


   
     existing federal, state, local and foreign laws and regulations relating to
     the protection of human health or the environment or imposing liability or
     requiring standards of conduct concerning any Hazardous Materials
     ("Environmental Laws"), except for such instances of noncompliance which,
     either singly or in the aggregate, would not have a material adverse effect
     on the condition (financial or otherwise), properties, business,
     management, prospects, net worth or results of operations of the Company
     and its subsidiaries, considered as a whole. The term "Hazardous Material"
     means (i) any "hazardous substance" as defined by the Comprehensive
     Environmental Response, Compensation and Liability Act of 1980, as amended,
     (ii) any "hazardous waste" as defined by the Resource Conservation and
     Recovery Act, as amended, (iii) any petroleum or petroleum product, (iv)
     any polychlorinated biphenyl and (v) any pollutant or contaminant or
     hazardous, dangerous or toxic chemical, material, waste or substance
     regulated under or within the meaning of any other Environment Law." 
    

           n  The Company and its subsidiaries have filed all necessary federal,
     state, local and foreign income, payroll, franchise and other tax returns
     and have paid all taxes shown as due thereon or with respect to any of
     their properties, and there is no tax deficiency that has been, or to the
     knowledge of the Company is likely to be, asserted against the Company or
     any of its subsidiaries or any of their respective properties or assets
     that would adversely affect the financial position, business or operations
     of the Company and its subsidiaries. 

           o  No person or entity other than Dr. Kenneth L. Davis has the right
     to require registration of shares of Common Stock or other securities of
     the Company because of the filing or effectiveness of the Registration
     Statement or otherwise, except for persons and entities who have expressly
     waived such right or who have been given proper notice and have failed to
     exercise such right within the time or times required under the terms and
     conditions of such right. 

           p  Neither the Company nor any of its officers, directors or
     affiliates has taken or will take, directly or indirectly, any action
     designed or intended to stabilize or manipulate the price of any security
     of the Company, or which caused or resulted in, or which might in the
     future reasonably be expected to cause or result in, stabilization or
     manipulation of the price of any security of the Company. 

   
           q  Except as set forth in the Prospectus and the Registration
     Statement under the captions "Risk Factors -- Uncertainties Regarding
     Patents and Proprietary Rights" and "Business -- Patents, Proprietary
     Technology and Trade Secrets," (i) the Company and each of its subsidiaries
     own or possess valid and enforceable licenses or other rights to use all
     patents, patent applications, patent rights, inventions, trademarks
     (registered or unregistered), trademark applications, tradenames, service
     marks, service mark applications, copyrights, manufacturing processes,
     formulae, trade secrets, know-how, franchises and other material intangible
     property and assets (collectively, "Intellectual Property") necessary to
     the conduct of their businesses as currently conducted or as proposed to be
     conducted as described in the Prospectus and the Registration Statement;
     (ii) neither the Company nor any of its subsidiaries has any knowledge that
     it lacks or will be unable to obtain or retain any rights or licenses to
     use any of the Intellectual Property necessary to conduct the business now
     conducted or proposed to be conducted by it as described in the Prospectus
     and the Registration Statement; (iii) neither the Company nor any of its
     subsidiaries has any knowledge of any third parties who have or will be
     able to establish rights to any of the Intellectual Property, except for
     the ownership rights of the owners of the Intellectual Property which is
     licensed to the Company or its subsidiaries; (iv) to the knowledge of the
     Company, there is no infringement by third parties of any of the
     Intellectual Property; (v) there is no pending or, to the knowledge of the
     Company, threatened action, suit, proceeding or claim by others challenging
     the Company's or any of its subsidiary's rights of title or other interest
     in or to any Intellectual Property, and the Company is unaware of any facts
     which would form a reasonable basis for any such claim; (vi) there is no
     pending or, to the knowledge of the Company, threatened action, suit,
     proceeding or claim by others challenging the validity or scope of any
     Intellectual Property, and the Company is unaware of any facts which would
     form a reasonable basis for any such claim; (vii) there is not pending or,
     to the knowledge of the Company, threatened action, suit, proceeding or
     claim by others that the Company or any of its subsidiaries or their
     products or processes infringe or otherwise violate any patent, trademark,
     copyright, trade secret or other proprietary right of others, and the
     Company is unaware of any facts which would form a reasonable basis for any
     such claim; (viii) to the knowledge of the Company, there is no patent or
     patent application which contains claims that interfere with the issued or
     pending claims of any of the Intellectual Property; (ix) to the knowledge
     of the Company, there are no facts which would bar the grant of a patent
     from each of the patent applications within the Intellectual Property; (x)
     there is no pending or, to the knowledge of the Company, threatened action,
     suit, proceeding or claim by any current or former employee, consultant or
     agent of the Company or any of its
    

<PAGE>   6
                                       6

     subsidiaries seeking either ownership rights to any invention or
     compensation from the Company or any of its subsidiaries for any invention
     made by such employee, consultant or agent in the course of his/her
     employment with the Company or any subsidiary, nor, to the knowledge of the
     Company, can any such action, suit, proceeding or claim, if instituted, be
     sustained; and (xi) to the knowledge of the Company, none of the patents
     owned or licensed by the Company or any of its subsidiaries are
     unenforceable or invalid and there is no act or omission of which the
     Company is aware that may render any patent or patent application within
     the Intellectual Property unpatentable, unenforceable or invalid. The
     Company and each of its subsidiaries have clear title to all of their
     patents and patent applications, free and clear of any pledges, liens,
     security interests, charges, encumbrances, claims, equitable interests or
     restrictions. The Registration Statement and the Prospectus fairly and
     accurately describe the Company's and each of its subsidiary's rights with
     respect to the Intellectual Property. The Company and each of its
     subsidiaries have duly and properly filed or caused to be filed with the
     United States Patent and Trademark Office (the "PTO") and applicable
     foreign and international patent authorities all patent applications
     described or referred to in the Registration Statement and the Prospectus,
     and the Company believe that they have complied with the PTO's duty of
     candor and disclosure for each of the United States patent applications
     described or referred to in the Registration Statement and the Prospectus.

   
    
           r  The Company and its subsidiaries have performed all material
     obligations required to be performed by them under all contracts required
     by Item 601(b)(10) of Regulation S-K under the Securities Act to be filed,
     or incorporated by reference as, exhibits to the Company's Annual Report on
     Form 10-K as filed with the Commission for the year ended December 31,
     1997, and neither the Company nor any of its subsidiaries nor any other
     party to such contract is in default under or in breach of any such
     obligations. Neither the Company nor any of its subsidiaries has received
     any notice of such default or breach. 

           s  The Company is not involved in any labor dispute nor is any such
     dispute threatened. The Company is not aware that (A) any executive, key
     employee or significant group of employees of the Company or any subsidiary
     plans to terminate employment with the Company or any such subsidiary or
     (B) any such executive or key employee is subject to any noncompete,
     nondisclosure, confidentiality, employment, consulting or similar agreement
     that would be violated by the present or proposed business activities of
     the Company and its subsidiaries. Neither the Company nor any subsidiary
     has or expects to have any liability for any prohibited transaction or
     funding deficiency or any complete or partial withdrawal liability with
     respect to any pension, profit sharing or other plan which is subject to
     the Employee Retirement Income Security Act of 1974, as amended ("ERISA"),
     to which the Company or any subsidiary makes or ever has made a
     contribution and in which any employee of the Company or any subsidiary is
     or has ever been a participant. With respect to such plans, the Company and
     each subsidiary are in compliance in all material respects with all
     applicable provisions of ERISA. 

           t  The Company has obtained the written agreement described in 
     Section 8(j) of this Agreement from each of its officers, directors and
     holders of Common Stock listed on Schedule C hereto. 

           u  The Company and its subsidiaries have, and the Company and its
     subsidiaries as of the Closing Dates will have, good and marketable title
     in fee simple to all real property and good and marketable title to all
     personal property owned or proposed to be owned by them which is material
     to the business of the Company or of its subsidiaries, in each case free
     and clear of all liens, encumbrances and defects except such as are
     described the Prospectus or such as would not have a material adverse
     effect on the Company and its subsidiaries considered as a whole; and any
     real property and buildings held under lease by the Company and its
     subsidiaries or proposed to be held after giving effect to the transactions
     described in the Prospectus are, or will be as of each of the Closing
     Dates, held by them under valid, subsisting and enforceable leases with
     such exceptions as would not have a material adverse effect on the Company
     and its subsidiaries considered as a whole, in each case except as
     described in or contemplated by the Prospectus. 


<PAGE>   7
                                       7


   
           v  The Company and its subsidiaries are insured by insurers of
     recognized financial responsibility against such losses and risks and in
     such amounts as described in the Prospectus; and neither the Company nor
     any subsidiary of the Company has any reason to believe that it will not be
     able to renew its existing insurance coverage as and when such coverage
     expires or to obtain similar coverage from similar insurers at a cost that
     would not materially and adversely affect the condition, financial or
     otherwise, or the earnings, business or operations of the Company and its
     subsidiaries considered as a whole, except as described in or contemplated
     by the Prospectus. 
    

           w  Other than as contemplated by this Agreement, there is no broker,
     finder or other party that is entitled to receive from the Company any
     brokerage or finder's fee or other fee or commission as a result of any of
     the transactions contemplated by this Agreement. 

   
           x  The Company and each of its subsidiaries maintain a system of
     internal accounting controls sufficient to provide reasonable assurances
     that (i) transactions are executed in accordance with management's general
     or specific authorization; (ii) transactions are recorded as necessary to
     permit preparation of financial statements in conformity with generally
     accepted accounting principles and to maintain accountability for assets;
     (iii) access to assets is permitted only in accordance with management's
     general or specific authorization; and (iv) the recorded accountability for
     assets is compared with existing assets at reasonable intervals and
     appropriate action is taken with respect to any differences. 

           y  To the Company's knowledge, neither the Company nor any of its
     subsidiaries nor any employee or agent of the Company or any of its
     subsidiaries has made any payment of funds of the Company or any of its
     subsidiaries or received or retained any funds in violation of any law,
     rule or regulation, which payment, receipt or retention of funds is of a
     character required to be disclosed in the Prospectus. 

           z  Neither the Company nor any of its subsidiaries is or, after
     application of the net proceeds of this offering as described under the
     caption "Use of Proceeds" in the Prospectus, will become an "investment
     company" or an entity "controlled" by an "investment company" as such terms
     are defined in the Investment Company Act of 1940, as amended. 

           aa  The Common Stock is registered pursuant to Section 12(g) of the
     Exchange Act. The Stock has been applied for quotation on the Nasdaq
     National Market. The Company has taken no action designed to, or likely to
     have the effect of, terminating the registration of the Common Stock under
     the Exchange Act or delisting the Common Stock from the Nasdaq National
     Market, nor has the Company received any notification that the Commission
     or the Nasdaq National Market is contemplating terminating such
     registration or listing. 
    

3.   PURCHASE BY, AND SALE AND DELIVERY TO, UNDERWRITERS--CLOSING DATES. The
     Company agrees to sell to the Underwriters the Firm Stock, and on the basis
     of the representations, warranties, covenants and agreements herein
     contained, but subject to the terms and conditions herein set forth, the
     Underwriters agree, severally and not jointly, to purchase the Firm Stock
     from the Company, the number of shares of Firm Stock to be purchased by
     each Underwriter being set opposite its name in Schedule A, subject to
     adjustment in accordance with Section 12 hereof.

     The purchase price per share to be paid by the Underwriters to the Company
     will be the price per share set forth in the table on the cover page of the
     Prospectus under the heading "Proceeds to the Company" (the "Purchase
     Price").

     The Company will deliver the Firm Stock to the Representatives for the
     respective accounts of the several Underwriters (in the form of definitive
     certificates, issued in such names and in such denominations as the
     Representatives may direct by notice in writing to the Company given at or
     prior to 12:00 Noon, New York Time, on the second full business day
     preceding the First Closing Date (as defined below) or, if no such
     direction is received, in the names of the respective Underwriters or in
     such other names as Cowen may 


<PAGE>   8
                                       8


     designate (solely for the purpose of administrative convenience) and in
     such denominations as Cowen may determine, against payment of the aggregate
     Purchase Price therefor in immediately available funds (same day funds),
     payable to the order of the Company, all at the offices of Brobeck, Phleger
     & Harrison LLP, 1633 Broadway, 47th Floor, New York, New York 10019. The
     time and date of the delivery and closing shall be at 10:00 A.M., New York
     Time, on _____________, 1998, in accordance with Rule 15c6-1 of the 
     Exchange Act. The time and date of such payment and delivery are herein
     referred to as the "First Closing Date". The First Closing Date and the
     location of delivery of, and the form of payment for, the Firm Stock may
     be varied by agreement between the Company and Cowen. The First Closing
     Date may be postponed pursuant to the provisions of Section 12.

     The Company shall make the certificates for the Stock available to the
     Representatives for examination on behalf of the Underwriters not later
     than 10:00 A.M., New York Time, on the business day preceding the First
     Closing Date at the offices of Cowen & Company, Financial Square, New York,
     New York 10005.

     It is understood that Cowen, Furman Selz LLC or Vector Securities
     International, Inc., individually and not as Representatives of the several
     Underwriters, may (but shall not be obligated to) make payment to the
     Company on behalf of any Underwriter or Underwriters, for the Stock to be
     purchased by such Underwriter or Underwriters. Any such payment by Cowen or
     Furman Selz LLC or Vector Securities International, Inc. shall not relieve
     such Underwriter or Underwriters from any of its or their other obligations
     hereunder.

     The several Underwriters agree to make a public offering of the Firm Stock
     at the public offering price as soon after the effectiveness of the
     Registration Statement as in their judgment is advisable. The
     Representatives shall promptly advise the Company of the making of the
     initial public offering.

     For the purpose of covering any over-allotments in connection with the
     distribution and sale of the Firm Stock as contemplated by the Prospectus,
     the Company hereby grants to the Underwriters an option to purchase, up to
     an aggregate of 300,000 additional shares of Common Stock. The price per
     share to be paid for the Optional Stock shall be the Purchase Price. The
     option granted hereby may be exercised as to all or any part of the
     Optional Stock at any time, and from time to time, not more than thirty
     (30) days subsequent to the effective date of this Agreement. No Optional
     Stock shall be sold and delivered unless the Firm Stock previously has
     been, or simultaneously is, sold and delivered. The right to purchase the
     Optional Stock or any portion thereof may be surrendered and terminated at
     any time upon notice by the Underwriters to the Company.

     The option granted hereby may be exercised by the Underwriters by giving
     written notice from Cowen to the Company setting forth the number of shares
     of the Optional Stock to be purchased by them and the date and time for
     delivery of and payment for the Optional Stock. Each date and time for
     delivery of and payment for the Optional Stock (which may be the First
     Closing Date, but not earlier) is herein called the "Option Closing Date"
     and shall in no event be earlier than two (2) business days nor later than
     ten (10) business days after written notice is given. (The Option Closing
     Date and the First Closing Date are herein called the "Closing Dates".) All
     purchases of Optional Stock from the Company shall be made on a pro rata
     basis. Optional Stock shall be purchased for the account of each
     Underwriter in the same proportion as the number of shares of Firm Stock
     set forth opposite such Underwriter's name in Schedule A hereto bears to
     the total number of shares of Firm Stock (subject to adjustment by the
     Underwriters to eliminate odd lots). Upon exercise of the option by the
     Underwriters, the Company agrees to sell to the Underwriters the number of
     shares of Optional Stock set forth in the written notice of exercise and
     the Underwriters agree, severally and not jointly and subject to the terms
     and conditions herein set forth, to purchase the number of such shares
     determined as aforesaid.

     The Company will deliver the Optional Stock to the Underwriters (in the
     form of definitive certificates, issued in such names and in such
     denominations as the Representatives may direct by notice in writing to the
     Company given at or prior to 12:00 Noon, New York Time, on the second full
     business day preceding the Option Closing Date or, if no such direction is
     received, in the names of the respective Underwriters or in such other
     names as Cowen may designate (solely for the purpose of administrative
     convenience) and in such denominations as Cowen may determine, against
     payment of the aggregate Purchase Price therefor by wire transfer in
     immediately available funds (same day funds), payable to the order of the
     Company all at the offices of Brobeck, Phleger & Harrison LLP, 1633
     Broadway, 47th Floor, New York, New York 10019. The Company shall make the
     certificates for the Optional Stock available to the underwriters for
     examination no later than 

<PAGE>   9
                                       9


     10:00 A.M., New York Time, on the business day preceding the Option Closing
     Date at the offices of Cowen & Company, Financial Square, New York, New
     York 10005. The Option Closing Date and the location of delivery of, and
     the form of payment for, the Option Stock may be varied by agreement
     between the Company and Cowen. The Option Closing Date may be postponed
     pursuant to the provisions of Section 12.

4.   COVENANTS AND AGREEMENTS OF THE COMPANY. The Company covenants and agrees
     with the several Underwriters that:

          (a)  The Company will (i) if the Company and the Representatives have
               determined not to proceed pursuant to Rule 430A of the of the
               Rules and Regulations, use its best efforts to cause the
               Registration Statement to become effective, (ii) if the Company
               and the Representatives have determined to proceed pursuant to
               Rule 430A of the Rules and Regulations, use its best efforts to
               comply with the provisions of and make all requisite filings with
               the Commission pursuant to Rule 430A and Rule 424 of the Rules
               and Regulations and (iii) if the Company and the Representatives
               have determined to deliver Prospectuses pursuant to Rule 434 of
               the Rules and Regulations, to use its best efforts to comply with
               all the applicable provisions thereof. The Company will advise
               the Representatives promptly as to the time at which the
               Registration Statement becomes effective, will advise the
               Representatives promptly of the issuance by the Commission of any
               stop order suspending the effectiveness of the Registration
               Statement or of the institution of any proceedings for that
               purpose, and will use its best efforts to prevent the issuance of
               any such stop order and to obtain as soon as possible the lifting
               thereof, if issued. The Company will advise the Representatives
               promptly of the receipt of any comments of the Commission or any
               request by the Commission for any amendment of or supplement to
               the Registration Statement or the Prospectus or for additional
               information and will not at any time file any amendment to the
               Registration Statement or supplement to the Prospectus which
               shall not previously have been submitted to the Representatives a
               reasonable time prior to the proposed filing thereof or to which
               the Representatives shall reasonably object in writing or which
               is not in compliance with the Securities Act and the Rules and
               Regulations.

          (b)  The Company will prepare and file with the Commission, promptly
               upon the request of the Representatives, any amendments or
               supplements to the Registration Statement or the Prospectus which
               in the opinion of the Representatives and the Company may be
               necessary to enable the several Underwriters to continue the
               distribution of the Stock and will use its best efforts to cause
               the same to become effective as promptly as possible. The Company
               will promptly file all reports and any definitive proxy or
               information statements required to be filed with the Commission
               pursuant to Section 13, 14 or 15(d) of the Exchange Act
               subsequent to the date of the Prospectus and for so long as the
               delivery of a prospectus is required in connection with the
               offering or sale of the Stock. 

          (c)  If at any time after the effective date of the Registration
               Statement when a prospectus relating to the Stock is required to
               be delivered under the Securities Act any event relating to or
               affecting the Company or any of its subsidiaries occurs as a
               result of which the Prospectus or any other prospectus as then in
               effect would include an untrue statement of a material fact, or
               omit to state any material fact necessary to make the statements
               therein, in light of the circumstances under which they were
               made, not misleading, or if it is necessary at any time to amend
               the Prospectus to comply with the Securities Act, the Company
               will promptly notify the Representatives thereof and will prepare
               an amended or supplemented prospectus or make an appropriate
               filing pursuant to Section 13 or 14 of the Exchange Act which
               will correct such statement or omission; and in case any
               Underwriter is required to deliver a prospectus relating to the
               Stock nine (9) months or more after the effective date of the
               Registration Statement, the Company upon the request of the
               Representatives and at the expense of such Underwriter will
               prepare promptly such prospectus or prospectuses as may be
               necessary to permit compliance with the requirements of Section
               10(a)(3) of the Securities Act. 

          (d)  The Company will deliver to the Representatives, at or before the
               Closing Dates, a signed copy of the Registration Statement, as
               originally filed with the Commission, and all amendments thereto
               including all financial statements and exhibits thereto and all
               documents theretofore incorporated by reference therein, and will
               deliver to the Representatives such number of copies of the
               Registration Statement, including such financial statements and
               all documents theretofore incorporated by reference therein but



<PAGE>   10
                                       10


               without exhibits, and all amendments thereto, as the
               Representatives may reasonably request. The Company will deliver
               or mail to or upon the order of the Representatives, from time to
               time until the effective date of the Registration Statement, as
               many copies of the Preeffective Prospectus as the Representatives
               may reasonably request. The Company will deliver or mail to or
               upon the request of the Representatives on the date of the public
               offering, and thereafter from time to time during the period when
               delivery of a prospectus relating to the Stock is required under
               the Securities Act, as many copies of the Prospectus, in final
               form or as thereafter amended or supplemented as the
               Representatives may reasonably request; provided, however, that
               the expense of the preparation and delivery of any prospectus
               required for use nine (9) months or more after the effective date
               of the Registration Statement shall be borne by the Underwriters
               required to deliver such prospectus. 

          (e)  The Company will make generally available to its shareholders as
               soon as practicable, but not later than fifteen (15) months after
               the effective date of the Registration Statement, an earning
               statement which will be in reasonable detail (but which need not
               be audited) and which will comply with Section 11(a) of the
               Securities Act, covering a period of at least twelve (12) months
               beginning after the "effective date" (as defined in Rule 158
               under the Securities Act) of the Registration Statement. 

          (f)  The Company will cooperate with the Representatives to enable the
               Stock to be registered or qualified for offering and sale by the
               Underwriters and by dealers under the securities laws of such
               jurisdictions as the Representatives may designate and at the
               request of the Representatives will make such applications and
               furnish such consents to service of process or other documents as
               may be required of it as the issuer of the Stock for that
               purpose; provided, however, that the Company shall not be
               required to qualify to do business or to file a general consent
               (other than that arising out of the offering or sale of the
               Stock) to service of process in any such jurisdiction where it is
               not now so subject. The Company will, from time to time, prepare
               and file such statements and reports as are or may be required of
               it as the issuer of the Stock to continue such qualifications in
               effect for so long a period as the Representatives may reasonably
               request for the distribution of the Stock. The Company will
               advise the Representatives promptly after the Company becomes
               aware of the suspension of the qualifications or registration of
               (or any such exception relating to) the Common Stock of the
               Company for offering, sale or trading in any jurisdiction or of
               any initiation or threat of any proceeding for any such purpose,
               and in the event of the issuance of any orders suspending such
               qualifications, registration or exception, the Company will, with
               the cooperation of the Representatives use its best efforts to
               obtain the withdrawal thereof. 

   
          (g)  The Company will furnish to its shareholders annual reports
               containing financial statements certified by independent public
               accountants. During the period of three (3) years from the date
               hereof, the Company will deliver to the Representatives and, upon
               request, to each of the other Underwriters, as soon as they are
               available, copies of each annual report of the Company and each
               other report furnished by the Company to its shareholders and
               will deliver to the Representatives, (i) as soon as they are
               available, copies of any other reports (financial or other) which
               the Company shall publish or otherwise make available to any of
               its shareholders as such, (ii) as soon as they are available,
               copies of any reports and financial statements furnished to or
               filed with the Commission or any national securities exchange
               (including, without limitation, each proxy statement, Annual
               Report on Form 10-K, Quarterly Report on Form 10-Q, Report on
               Form 8-K or other report filed by the Company with the
               Commission, or the NASD or any securities exchange) and (iii)
               from time to time such other information concerning the Company
               as you may request. So long as the Company has active
               subsidiaries, such financial statements will be on a consolidated
               basis to the extent the accounts of the Company and its
               subsidiaries are consolidated in reports furnished to its
               shareholders generally. Separate financial statements shall be
               furnished for all subsidiaries whose accounts are not
               consolidated but which at the time are significant subsidiaries
               as defined in the Rules and Regulations. 
    

          (h)  The Company will use its best efforts to have the Stock
               designated for quotation, subject to official notice of issuance,
               on the Nasdaq National Market concurrently with the effectiveness
               of the Registration Statement. 

          (i)  The Company will maintain a transfer agent and registrar for its
               Common Stock. 

<PAGE>   11
                                       11



          (j)  Company will not offer, sell, assign, transfer, encumber,
               contract to sell, grant an option to purchase (other than
               pursuant to the Company's stock option plans) or otherwise
               dispose of, other than by operation of law, gifts, pledges or
               dispositions by estate representatives, and exercises of options
               any shares of Common Stock or securities convertible into or
               exercisable or exchangeable for Common Stock (including, without
               limitation, Common Stock of the Company which may be deemed to be
               beneficially owned by the Company in accordance with the Rules
               and Regulations) during the 90 days following the date on which
               the price of the Common Stock to be purchased by the Underwriters
               is set, other than the Company's sale of Common Stock hereunder
               and the Company's issuance of Common Stock upon the exercise of
               warrants and stock options which are presently outstanding and
               described in the Prospectus. 

          (k)  The Company will apply the net proceeds from the sale of the
               Stock as set forth in the description under "Use of Proceeds" in
               the Prospectus, which description complies in all respects with
               the requirements of Item 504 of Regulation S-K.

          (l)  The Company will supply you with copies of all correspondence to
               and from, and all documents issued to and by, the Commission in
               connection with the registration of the Stock under the
               Securities Act.

          (m)  Prior to each of the Closing Dates the Company will furnish to
               you, as soon as they have been prepared, copies of any unaudited
               interim consolidated financial statements of the Company and its
               subsidiaries for any periods subsequent to the periods covered by
               the financial statements appearing in the Registration Statement
               and the Prospectus.

          (n)  Prior to each of the Closing Dates the Company will issue no
               press release or other communications directly or indirectly and
               hold no press conference with respect to the Company or any of
               its subsidiaries, the financial condition, results of operations,
               business, prospects, assets or liabilities of any of them, or the
               offering of the Stock, without your prior written consent.

   
          (o)  If at any time during the 180 day period after the Registration
               Statement becomes effective, any rumor, publication or event
               relating to or affecting the Company shall occur as a result of
               which in your opinion the market price of the Common Stock has
               been or is likely to be materially affected (regardless of
               whether such rumor, publication or event necessitates a
               supplement to or amendment of the Prospectus), the Company will,
               after written notice from you advising the Company to the effect
               set forth above, consult with you in good faith regarding the
               necessity of disseminating a press release or other public
               statement responding to or commenting on such rumor, publication
               or event and, if the Company in its reasonable judgment
               determines that such a press release or other public statement is
               appropriate, the substance of any press release or other public
               statement.
    

5. PAYMENT OF EXPENSES.

          (a)  The Company will pay (directly or by reimbursement) all costs,
               fees and expenses incurred in connection with expenses incident
               to the performance of its obligations under this Agreement and in
               connection with the transactions contemplated hereby, including
               but not limited to (i) all expenses and taxes incident to the
               issuance and delivery of the Stock to the Representatives; (ii)
               all expenses incident to the registration of the Stock under the
               Securities Act; (iii) the costs of preparing stock certificates


<PAGE>   12
                                       12


               (including printing and engraving costs); (iv) all fees and
               expenses of the registrar and transfer agent of the Stock; (v)
               all necessary issue, transfer and other stamp taxes in connection
               with the issuance and sale of the Stock to the Underwriters; (vi)
               fees and expenses of the Company's counsel and the Company's
               independent accountants; (vii) all costs and expenses incurred in
               connection with the preparation, printing filing, shipping and
               distribution of the Registration Statement, each Preeffective
               Prospectus and the Prospectus (including all exhibits and
               financial statements) and all amendments and supplements provided
               for herein, the "Agreement Among Underwriters" between the
               Representatives and the Underwriters, the Master Selected
               Dealers' Agreement, the Underwriters' Questionnaire and the Blue
               Sky memoranda (including related fees and expenses of counsel to
               the Underwriters) and this Agreement; (viii) all filing fees,
               reasonable attorneys' fees and expenses (not to exceed $5,000
               without the Company's prior consent, which shall not be
               unreasonably withheld) incurred by the Company or the
               Underwriters in connection with exemptions from the qualifying or
               registering (or obtaining qualification or registration of) all
               or any part of the Stock for offer and sale and determination of
               its eligibility for investment under the Blue Sky or other
               securities laws of such jurisdictions as the Representatives may
               designate; (ix) all fees and expenses paid or incurred in
               connection with filings made with the NASD (including related
               fees and expenses of counsel to the Underwriters); and (x) all
               other costs and expenses incident to the performance of its
               obligations hereunder which are not otherwise specifically
               provided for in this Section.

          (b)  In addition to its other obligations under Section 6(a) hereof,
               the Company agrees that, as an interim measure during the
               pendency of any claim, action, investigation, inquiry or other
               proceeding arising out of or based upon (i) any statement or
               omission or any alleged statement or omission, (ii) any act or
               failure to act or any alleged act or failure to act or (iii) any
               breach or inaccuracy in its representations and warranties, it
               will reimburse each Underwriter on a quarterly basis for all
               reasonable legal or other expenses incurred in connection with
               investigating or defending any such claim, action, investigation,
               inquiry or other proceeding, notwithstanding the absence of a
               judicial determination as to the propriety and enforceability of
               the Company's obligation to reimburse each Underwriter for such
               expenses and the possibility that such payments might later be
               held to have been improper by a court of competent jurisdiction.
               To the extent that any such interim reimbursement payment
               pursuant to Section 6 is so held to have been improper, each
               Underwriter shall promptly return it to the Company together with
               interest, compounded daily, determined on the basis of the prime
               rate (or other commercial lending rate for borrowers of the
               highest credit standing) announced from time to timed by The
               Chase Manhattan Bank, New York, New York (the "Prime Rate"). Any
               such interim reimbursement payments which are not made to an
               Underwriter within 30 days as provided below shall bear interest
               at the Prime Rate from the due date for such reimbursement. This
               expense reimbursement agreement will be in addition to any other
               liability which the Company may otherwise have. The request for
               reimbursement will be sent to the Company. 

          (c)  In addition to its other obligations under Section 6(b) hereof,
               each Underwriter severally agrees that, as an interim measure
               during the pendency of any claim, action, investigation, inquiry
               or other proceeding arising out of or based upon any statement or
               omission, or any alleged statement or omission, described in
               Section 6(b) hereof which relates to information furnished to the
               Company, it will reimburse the Company (and, to the extent
               applicable, each officer, director, or controlling person) on a
               quarterly basis for all reasonable legal or other expenses
               incurred in connection with investigating or defending any such
               claim, action, investigation, inquiry or other proceeding,
               notwithstanding the absence of a judicial determination as to the
               propriety and enforceability of the Underwriters' obligation to
               reimburse the Company (and, to the extent applicable, each
               officer, director, or controlling person) for such expenses and
               the possibility that such payments might later be held to have
               been improper by a court of competent jurisdiction. To the extent
               that any such interim reimbursement payment is so held to have
               been improper, the Company (and, to the extent applicable, each
               officer, director, or controlling person) shall promptly return
               it to the Underwriters together with interest, compounded daily,
               determined on the basis of the Prime Rate. Any such interim
               reimbursement payments which are not made to the Company within
               thirty (30) days of a request for reimbursement shall bear
               interest at the Prime Rate from the date of such request. This
               indemnity agreement will be in addition to any liability which
               such Underwriter may otherwise have. 

<PAGE>   13
                                       13


          (d)  It is agreed that any controversy arising out of the operation of
               the interim reimbursement arrangements set forth in paragraph (b)
               and/or (c) of this Section 5, including the amounts of any
               requested reimbursement payments and the method of determining
               such amounts, shall be settled by arbitration conducted under the
               provisions of the Constitution and Rules of the Board of
               Governors of the New York Stock Exchange, Inc. or pursuant to the
               Code of Arbitration Procedure of the NASD. Any such arbitration
               must be commenced by service of a written demand for arbitration
               or written notice of intention to arbitrate, therein electing the
               arbitration tribunal. In the event the party demanding
               arbitration does not make such designation of an arbitration
               tribunal in such demand or notice, then the party responding to
               said demand or notice is authorized to do so. Such an arbitration
               would be limited to the operation of the interim reimbursement
               provisions contained in paragraph (b) and/or (c) of this Section
               5 and would not resolve the ultimate propriety or enforceability
               of the obligation to reimburse expenses which is created by the
               provisions of Section 

6. INDEMNIFICATION AND CONTRIBUTION.

   
          (a)  The Company agrees to indemnify and hold harmless each
               Underwriter and each person, if any, who controls such
               Underwriter within the meaning of the Securities Act and the
               respective officers, directors, partners, employees,
               representatives and agents of each of such Underwriter
               (collectively, the "Underwriter Indemnified Parties" and, each,
               an "Underwriter Indemnified Party"), against any losses, claims,
               damages, liabilities or expenses (including the reasonable cost
               of investigating and defending against any claims therefor and
               counsel fees incurred in connection therewith), joint or several,
               which may be based upon the Securities Act, or any other statute
               or at common law, (i) on the ground or alleged ground that any
               Preeffective Prospectus, the Registration Statement or the
               Prospectus (or any Preeffective Prospectus, the Registration
               Statement or the Prospectus as from time to time amended or
               supplemented) includes or allegedly includes an untrue statement
               of a material fact or omits to state a material fact required to
               be stated therein or necessary in order to make the statements
               therein, in light of the circumstances under which they were
               made, not misleading, unless such statement or omission was made
               in reliance upon, and in conformity with, written information
               furnished to the Company by any Underwriter, directly or through
               the Representatives, specifically for use in the preparation
               thereof or (ii) for any act or failure to act or any alleged act
               or failure to act by any Underwriter in connection with, or
               relating in any manner to, the Stock or the offering contemplated
               hereby, and which is included as part of or referred to in any
               loss, claim, damage, liability or expense arising out of or based
               upon matters covered by clause (i) above (provided that the
               Company shall not be liable under this clause (ii) to the extent
               that it is determined in a final judgment by a court of competent
               jurisdiction that such loss, claim, damage, or liability or
               expense resulted directly from any such acts or failures to act
               undertaken or omitted to be taken by such Underwriter through its
               gross negligence or willful misconduct); provided, that with
               respect to any untrue statement or omission or alleged untrue
               statement or omission made in any Preeffective Prospectus, the
               indemnity agreement contained in this subsection (a) shall not
               inure to the benefit of any Underwriter Indemnified Party from
               whom the person asserting any such losses, claims, damages or
               liabilities purchased the shares of Stock concerned to the extent
               that any such loss, claim, damage or liability of such
               Underwriter Indemnified Party results from the fact that a copy
               of the Prospectus excluding documents incorporated by reference
               therein was not sent or given to such person at or prior to the
               written confirmation of the sale of such shares of Stock to such
               person as required by the Securities Act and if the untrue
               statement or omission concerned has been corrected in the
               Prospectus. The Company will be entitled to participate at its
               own expense in the defense or, if it so elects, to assume the
               defense of any suit brought to enforce any such liability, but if
               the Company elects to assume the defense, such defense shall be
               conducted by counsel chosen by it and reasonably acceptable to
               the Underwriters. In the event the Company elects to assume the
               defense of any such suit and retain such counsel, any Underwriter
               Indemnified Parties, defendant or defendants in the suit, may
               retain additional counsel but shall bear the fees and expenses of
               such counsel unless (i) the Company shall have specifically
               authorized the retaining of such counsel or (ii) the parties to
               such suit include any such Underwriter Indemnified Parties, and
               the Company and such Underwriter Indemnified Parties at law or in
               equity have been advised by counsel to the Underwriters that one
               or more legal defenses may
    

<PAGE>   14
                                       14


               be available to it or them which may not be available to the
               Company, in which case the Company shall not be entitled to
               assume the defense of such suit notwithstanding its obligation to
               bear the fees and expenses of such counsel, provided that the
               Company shall not, in connection with any proceeding or related
               proceedings in the same jurisdiction, be liable for the fees and
               expenses of more than one separate firm. This indemnity agreement
               is not exclusive and will be in addition to any liability which
               the Company might otherwise have and shall not limit any rights
               or remedies which may otherwise be available at law or in equity
               to each Underwriter Indemnified Party.

          (b)  Each Underwriter severally and not jointly agrees to indemnify
               and hold harmless the Company, each of its directors, each of its
               officers who have signed the Registration Statement and each
               person, if any, who controls the Company within the meaning of
               the Securities Act (collectively, the "Company Indemnified
               Parties") against any losses, claims, damages, liabilities or
               expenses (including, unless the Underwriter or Underwriters elect
               to assume the defense, the reasonable cost of investigating and
               defending against any claims therefor and counsel fees incurred
               in connection therewith), joint or several, which arise out of or
               are based in whole or in part upon the Securities Act, the
               Exchange Act or any other federal, state, local or foreign
               statute or regulation, or at common law, on the ground or alleged
               ground that any Preeffective Prospectus, the Registration
               Statement or the Prospectus (or any Preeffective Prospectus, the
               Registration Statement or the Prospectus, as from time to time
               amended and supplemented) includes an untrue statement of a
               material fact or omits to state a material fact required to be
               stated therein or necessary in order to make the statements
               therein, in light of the circumstances in which they were made,
               not misleading, but only insofar as any such statement or
               omission was made in reliance upon, and in conformity with,
               written information furnished to the Company by such Underwriter,
               directly or through the Representatives, specifically for use in
               the preparation thereof; provided, however, that in no case is
               such Underwriter to be liable with respect to any claims made
               against any Company Indemnified Party against whom the action is
               brought unless such Company Indemnified Party shall have notified
               such Underwriter in writing within a reasonable time after the
               summons or other first legal process giving information of the
               nature of the claim shall have been served upon the Company
               Indemnified Party, but failure to notify such Underwriter of such
               claim shall not relieve it from any liability which it may have
               to any Company Indemnified Party otherwise than on account of its
               indemnity agreement contained in this paragraph. Such Underwriter
               shall be entitled to participate at its own expense in the
               defense, or, if it so elects, to assume the defense of any suit
               brought to enforce any such liability, but, if such Underwriter
               elects to assume the defense, such defense shall be conducted by
               counsel chosen by it. In the event that any Underwriter elects to
               assume the defense of any such suit and retain such counsel, the
               Company Indemnified Parties and any other Underwriter or
               Underwriters or controlling person or persons, defendant or
               defendants in the suit, shall bear the fees and expenses of any
               additional counsel retained by them, respectively. The
               Underwriter against whom indemnity may be sought shall not be
               liable to indemnify any person for any settlement of any such
               claim effected without such Underwriter's consent. This indemnity
               agreement is not exclusive and will be in addition to any
               liability which such Underwriter might otherwise have and shall
               not limit any rights or remedies which may otherwise be available
               at law or in equity to any Company Indemnified Party. 

          (c)  If the indemnification provided for in this Section 6 is
               unavailable or insufficient to hold harmless an indemnified party
               under subsection (a) or (b) above in respect of any losses,
               claims, damages, liabilities or expenses (or actions in respect
               thereof) referred to herein, then each indemnifying party shall
               contribute to the amount paid or payable by such indemnified
               party as a result of such losses, claims, damages, liabilities or
               expenses (or actions in respect thereof) in such proportion as is
               appropriate to reflect the relative benefits received by the
               Company on the one hand and the Underwriters on the other from
               the offering of the Stock. If, however, the allocation provided
               by the immediately preceding sentence is not permitted by
               applicable law, then each indemnifying party shall contribute to
               such amount paid or payable by such indemnified party in such
               proportion as is appropriate to reflect not only such relative
               benefits but also the relative fault of the Company on the one
               hand and the Underwriters on the other in connection with the
               statements or omissions which resulted in such losses, claims,
               damages, liabilities or expenses (or actions in respect thereof),
               as well as any other relevant equitable considerations. The
               relative benefits received by the Company on the one hand and the
               Underwriters on the other shall be deemed to be in the same
               proportion as the total 

<PAGE>   15
                                       15


               net proceeds from the offering (before deducting expenses)
               received by the Company bear to the total underwriting discounts
               and commissions received by the Underwriters, in each case as set
               forth in the table on the cover page of the Prospectus. The
               relative fault 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
               the Underwriters and the parties' relative intent, knowledge,
               access to information and opportunity to correct or prevent such
               statement or omission. The Company and the Underwriters agree
               that it would not be just and equitable if contribution were
               determined by pro rata allocation (even if the Underwriters were
               treated as one entity for such purpose) or by any other method of
               allocation which does not take account of the equitable
               considerations referred to above. The amount paid or payable by
               an indemnified party as a result of the losses, claims, damages,
               liabilities or expenses (or actions in respect thereof) referred
               to above shall be deemed to include any legal or other expenses
               reasonably incurred by such indemnified party in connection with
               investigating, defending, settling or compromising any such
               claim. Notwithstanding the provisions of this subsection (c), no
               Underwriter shall be required to contribute any amount in excess
               of the amount by which the total price at which the shares of the
               Stock underwritten by it and distributed to the public were
               offered to the public exceeds the amount of any damages which
               such Underwriter has otherwise been required to pay by reason of
               such untrue or alleged untrue statement or omission or alleged
               omission. The Underwriters' obligations to contribute are several
               in proportion to their respective underwriting obligations and
               not joint. No person guilty of fraudulent misrepresentation
               (within the meaning of Section 11(f) of the Securities Act) shall
               be entitled to contribution from any person who was not guilty of
               such fraudulent misrepresentation.

7.   SURVIVAL OF INDEMNITIES, REPRESENTATIONS, WARRANTIES, ETC. The respective
     indemnities, covenants, agreements, representations, warranties and other
     statements of the Company and the several Underwriters, as set forth in
     this Agreement or made by them respectively, pursuant to this Agreement,
     shall remain in full force and effect, regardless of any investigation made
     by or on behalf of any Underwriter, the Company or any of its officers or
     directors or any controlling person, and shall survive delivery of and
     payment for the Stock.

8.   CONDITIONS OF UNDERWRITERS' OBLIGATIONS. The respective obligations of the
     several Underwriters hereunder shall be subject to the accuracy, at and
     (except as otherwise stated herein) as of the date hereof and at and as of
     each of the Closing Dates, of the representations and warranties made
     herein by the Company, to compliance at and as of each of the Closing Dates
     by the Company with its covenants and agreements herein contained and other
     provisions hereof to be satisfied at or prior to each of the Closing Dates,
     and to the following additional conditions:

          (a)  The Registration Statement shall have become effective and no
               stop order suspending the effectiveness thereof shall have been
               issued and no proceedings for that purpose shall have been
               initiated or, to the knowledge of the Company or the
               Representatives, shall be threatened by the Commission, and any
               request for additional information on the part of the Commission
               (to be included in the Registration Statement or the Prospectus
               or otherwise) shall have been complied with to the reasonable
               satisfaction of the Representatives. Any filings of the
               Prospectus, or any supplement thereto, required pursuant to Rule
               424(b) or Rule 434 of the Rules and Regulations, shall have been
               made in the manner and within the time period required by Rule
               424(b) and Rule 434 of the Rules and Regulations, as the case may
               be.

          (b)  The Representatives shall have been satisfied that there shall
               not have occurred any change, on a consolidated basis, prior to
               each of the Closing Dates in the condition (financial or
               otherwise), properties, business, management, prospects, net
               worth or results of operations of the Company and its
               subsidiaries considered as a whole, or any change in the capital
               stock, short-term or long-term debt of the Company and its
               subsidiaries considered as a whole, such that (i) the
               Registration Statement or the Prospectus, or any amendment or
               supplement thereto, contains an untrue statement of fact which,
               in the reasonable opinion of the Representatives, is material, or
               omits to state a fact which, in the reasonable opinion of the
               Representatives, is required to be stated therein or is necessary
               to make the statements therein not misleading, or (ii) it is
               unpracticable in the reasonable judgment of the Representatives
               to proceed with the public offering or purchase the Stock as
               contemplated hereby. 

<PAGE>   16
                                       16


          (c)  The Representatives shall be satisfied that no legal or
               governmental action, suit or proceeding affecting the Company
               which is material and adverse to the Company or which affects or
               may affect the Company's ability to perform their respective
               obligations under this Agreement shall have been instituted or
               threatened and there shall have occurred no material adverse
               development in any existing such action, suit or proceeding. 

          (d)  At the time of execution of this Agreement, the Representatives
               shall have received from Ernst & Young LLP, independent certified
               public accountants, a letter, dated the date hereof, in form and
               substance satisfactory to the Underwriters. 

          (e)  The Representatives shall have received from Ernst & Young LLP,
               independent certified public accountants, letters, dated each of
               the Closing Dates, to the effect that such accountants reaffirm,
               as of each of the Closing Dates, and as though made on each of
               the Closing Dates, the statements made in the letter furnished by
               such accountants pursuant to paragraph (d) of this Section 8. 

   
          (f)  The Representatives shall have received the opinions (i) Jones,
               Day, Reavis & Pogue, counsel for the Company, (ii) Pennie &
               Edmonds LLP, patent counsel to the Company, (iii) Dressler,
               Goldsmith, Milnamow & Katz, Ltd., patent counsel to the Company,
               and (iv) Hogan and Hartson L.L.P., FDA regulatory counsel to the
               Company, and (v) Mika O. Reinikainen, European regulatory counsel
               to the Company, dated as of each of the Closing Dates, in the
               forms attached hereto on Exhibit I, Exhibit II, Exhibit III,
               Exhibit IV and Exhibit V, respectively, addressed to the
               Underwriters and with reproduced copies of signed counterparts
               thereof for each of the Representatives. 
    

          (g)  The Representatives shall have received from Brobeck, Phleger &
               Harrison LLP, counsel for the Underwriters, their opinions dated
               each of the Closing Dates with respect to the incorporation of
               the Company, the validity of the Stock, the Registration
               Statement and the Prospectus and such other related matters as it
               may reasonably request, and the Company shall have furnished to
               such counsel such documents as they may reasonably request for
               the purpose of enabling them to pass upon such matters. 

          (h)  The Representatives shall have received a certificates, dated
               each of the Closing Dates, of the chief executive officer or the
               President and the chief financial or accounting officer of the
               Company to the effect that: 

               (i)     No stop order suspending the effectiveness of the 
                       Registration Statement has been issued, and, to the best
                       of the knowledge of the signers, no proceedings for that
                       purpose have been instituted or are pending or
                       contemplated under the Securities Act;

               (ii)    Neither any Preeffective Prospectus, as of its date, nor
                       the Registration Statement nor the Prospectus, nor any
                       amendment or supplement thereto, as of the time when the
                       Registration Statement became effective and at all times
                       subsequent thereto up to the delivery of such
                       certificate, included any untrue statement of a material
                       fact or omitted to state any material fact required to be
                       stated therein or necessary to make the statements
                       therein, in light of the circumstances under which they
                       were made, not misleading;

               (iii)   Subsequent to the respective dates as of which
                       information is given in the Registration Statement and
                       the Prospectus, and except as set forth or contemplated
                       in the Prospectus, neither the Company nor any of its
                       subsidiaries has incurred any material liabilities or
                       obligations, direct or contingent, nor entered into any
                       material transactions not in the ordinary course of
                       business and there has not been any material adverse
                       change in the condition (financial or otherwise),
                       properties, business, management, prospects, net worth or
                       results of operations of the Company and its subsidiaries
                       considered as a whole, or any change in the capital
                       stock, short-term or long-term debt of the Company and
                       its subsidiaries considered as a whole; 

<PAGE>   17
                                       17


               (iv)    The representations and warranties of the Company in this
                       Agreement are true and correct at and as of each of the
                       Closing Dates, and the Company has complied with all the
                       agreements and performed or satisfied all the conditions
                       on its part to be performed or satisfied at or prior to
                       the Closing Dates; and 

               (v)     Since the respective dates as of which information is
                       given in the Registration Statement and the Prospectus,
                       and except as disclosed in or contemplated by the
                       Prospectus, (i) there has not been any material adverse
                       change or a development involving a material adverse
                       change in the condition (financial or otherwise),
                       properties, business, management, prospects, net worth
                       or results of operations of the Company and its
                       subsidiaries considered as a whole; (ii) the business
                       and operations conducted by the Company and its
                       subsidiaries have not sustained a loss by strike, fire,
                       flood, accident or other calamity (whether or not
                       insured) of such a character as to interfere materially
                       with the conduct of the business and operations of the
                       Company and its subsidiaries considered as a whole;
                       (iii) no legal or governmental action, suit or
                       proceeding is pending or threatened against the Company
                       which is material to the Company, whether or not arising
                       from transactions in the ordinary course of business, or
                       which may materially and adversely affect the
                       transactions contemplated by this Agreement; (iv)
                       since such dates and except as so disclosed, the Company
                       has not incurred any material liability or obligation,
                       direct, contingent or indirect, made any change in its
                       capital stock (except pursuant to its stock plans), made
                       any material change in its short-term or funded debt or
                       repurchased or otherwise acquired any of the Company's
                       capital stock; and (v) the Company has not declared or
                       paid any dividend, or made any other distribution, upon
                       its outstanding capital stock payable to stockholders of
                       record on a date prior to the Closing Date. 

          (i)  The Company shall have furnished to the Representatives such
               additional certificates as the Representatives may have
               reasonably requested as to the accuracy, at and as of each of the
               Closing Dates, of the representations and warranties made herein
               by it and as to compliance at and as of each of the Closing Dates
               by it with its covenants and agreements herein contained and
               other provisions hereof to be satisfied at or prior to each of
               the Closing Dates, and as to satisfaction of the other conditions
               to the obligations of the Underwriters hereunder.

          (j)  Cowen shall have received the written agreements, substantially
               in the form of Exhibit VI hereto, of the officers, directors and
               holders of Common Stock listed in Schedule B that each will not
               offer, sell, assign, transfer, encumber, contract to sell, grant
               an option to purchase or otherwise dispose of, other than by
               operation of law, gifts, pledges or dispositions by estate
               representatives, any shares of Common Stock (including, without
               limitation, Common Stock which may be deemed to be beneficially
               owned by such officer, director or holder in accordance with the
               Rules and Regulations) during the 90 days following the date of
               the final Prospectus.

          (k)  The Nasdaq National Market shall have approved the Stock for
               designation of quotation, subject only to official notice of
               issuance.

     All opinions, certificates, letters and other documents will be in
     compliance with the provisions hereunder only if they are satisfactory in
     form and substance to the Representatives. The Company will furnish to the
     Representatives conformed copies of such opinions, certificates, letters
     and other documents as the Representatives shall reasonably request. If any
     of the conditions hereinabove provided for in this Section shall not have
     been satisfied when and as required by this Agreement, this Agreement may
     be terminated by the Representatives by notifying the Company of such
     termination in writing or by telegram at or prior to each of the Closing
     Dates, but Cowen, on behalf of the Representatives, shall be entitled to
     waive any of such conditions.

9.   EFFECTIVE DATE. This Agreement shall become effective immediately as to
     Sections 5, 6, 7, 9, 10, 11, 13, 14, 15, 16 and 17 and, as to all other
     provisions, at 11:00 a.m. New York City time on the first full business day
     following the effectiveness of the Registration Statement or at such
     earlier time after the Registration Statement becomes effective as the
     Representatives and the Company may mutually determine on and by notice to
     the Company or by release of any of the Stock for sale to the public. For
     the purposes of this Section 9, the Stock 

<PAGE>   18
                                       18


     shall be deemed to have been so released upon the release for publication
     of any newspaper advertisement relating to the Stock or upon the release by
     you of telegrams (i) advising Underwriters that the shares of Stock are
     released for public offering or (ii) offering the Stock for sale to
     securities dealers, whichever may occur first.

10.  TERMINATION. This Agreement (except for the provisions of Section 5) may be
     terminated by the Company at any time before it becomes effective in
     accordance with Section 9 by notice to the Representatives. In the event of
     any termination of this Agreement under this or any other provision of this
     Agreement, there shall be no liability of any party to this Agreement to
     any other party, other than as provided in Sections 5, 6 and 11 and other
     than as provided in Section 12 as to the liability of defaulting
     Underwriters.

     This Agreement may be terminated by the Representatives by notice to the
     Company (i) if at or prior to the First Closing Date trading in securities
     on any of the New York Stock Exchange, or Nasdaq National Market System
     shall have been suspended or minimum or maximum prices shall have been
     established on any such exchange or market, or a banking moratorium shall
     have been declared by New York or United States authorities; (ii) trading
     of any securities of the Company shall have been suspended on any exchange
     or in any over-the-counter market; (iii) if at or prior to the First
     Closing Date there shall have been (A) an outbreak or escalation of
     hostilities between the United States and any foreign power or of any other
     insurrection or armed conflict involving the United States or (B) any
     change in financial markets or any calamity or crisis which, in the
     judgment of the Representatives, makes it impractical or inadvisable to
     offer or sell the Stock on the terms contemplated by the Prospectus; (iv)
     if there shall have been any development or prospective development
     involving particularly the business or properties or securities of the
     Company or any of its subsidiaries or the transactions contemplated by this
     Agreement, which, in the judgment of the Representatives, makes it
     impracticable or inadvisable to offer or deliver the Stock on the terms
     contemplated by the Prospectus; (v) if there shall be any litigation or
     proceeding, pending or threatened, which, in the judgment of the
     Representatives, makes it impracticable or inadvisable to offer or deliver
     the on the terms contemplated by the Prospectus; or (vi) if there shall
     have occurred any of the events specified in the immediately preceding
     clauses (i) - (v) together with any other such event that makes it, in the
     reasonable judgment of the Representatives, impractical or inadvisable to
     offer or deliver the Stock on the terms contemplated by the Prospectus.

11.  REIMBURSEMENT OF UNDERWRITERS. Notwithstanding any other provisions hereof,
     if this Agreement shall not become effective by reason of any election of
     the Company pursuant to the first paragraph of Section 10 or shall be
     terminated by the Representatives under Section 8, the Company will bear
     and pay the expenses specified in Section 5 hereof and, in addition to its
     obligations pursuant to Section 6 hereof, the Company will reimburse the
     reasonable out-of-pocket expenses of the several Underwriters (including
     reasonable fees and disbursements of counsel for the Underwriters) incurred
     in connection with this Agreement and the proposed purchase of the Stock,
     and promptly upon demand the Company will pay such amounts to you as
     Representatives.

12.  SUBSTITUTION OF UNDERWRITERS. If any Underwriter or Underwriters shall
     default in its or their obligations to purchase shares of Stock hereunder
     and the aggregate number of shares which such defaulting Underwriter or
     Underwriters agreed but failed to purchase does not exceed ten percent
     (10%) of the total number of shares underwritten, the other Underwriters
     shall be obligated severally, in proportion to their respective commitments
     hereunder, to purchase the shares which such defaulting Underwriter or
     Underwriters agreed but failed to purchase. If any Underwriter or
     Underwriters shall so default and the aggregate number of shares with
     respect to which such default or defaults occur is more than ten percent
     (10%) of the total number of shares underwritten and arrangements
     satisfactory to the Representatives and the Company for the purchase of
     such shares by other persons are not made within forty-eight (48) hours
     after such default, this Agreement shall terminate. 

     If the remaining Underwriters or substituted Underwriters are required
     hereby or agree to take up all or part of the shares of Stock of a
     defaulting Underwriter or Underwriters as provided in this Section 12, (i)
     the Company shall have the right to postpone the Closing Dates for a
     period of not more than five (5) full business days in order that the
     Company may effect whatever changes may thereby be made necessary in the
     Registration Statement or the Prospectus, or in any other documents or
     arrangements, and the Company agrees promptly to file any amendments to
     the Registration Statement or supplements to the Prospectus which may
     thereby be made necessary, and (ii) the respective numbers of shares to be
     purchased by the remaining Underwriters or substituted Underwriters shall
     be taken as the basis of their underwriting obligation for all purposes of
     this 

<PAGE>   19
                                       19


     Agreement. Nothing herein contained shall relieve any defaulting
     Underwriter of its liability to the Company or the other Underwriters for
     damages occasioned by its default hereunder. Any termination of this
     Agreement pursuant to this Section 12 shall be without liability on the
     part of any non-defaulting Underwriter or the Company, except for expenses
     to be paid or reimbursed pursuant to Section 5 and except for the
     provisions of Section 6.

13.  NOTICES. All communications hereunder shall be in writing and, if sent to
     the Underwriters shall be mailed, delivered or telegraphed and confirmed to
     you, as their Representatives c/o Cowen & Company at Financial Square, New
     York, New York 10005 except that notices given to an Underwriter pursuant
     to Section 6 hereof shall be sent to such Underwriter at the address
     furnished by the Representatives, with a copy to Brobeck, Phleger &
     Harrison LLP, 1633 Broadway, 47th Floor, New York, New York 10019,
     Attention: Alexander D. Lynch, Esq., or, if sent to the Company, shall be
     mailed, delivered or telegraphed and confirmed c/o Gliatech Inc., 23420
     Commerce Park Road, Cleveland, Ohio 44122, Attention: Chief Financial
     Officer, with a copy to Jones, Day, Reavis & Pogue, 901 Lakeside Avenue,
     Cleveland, Ohio 44114, Attention: Thomas C. Daniels, Esq.

14.  SUCCESSORS. This Agreement shall inure to the benefit of and be binding
     upon the several Underwriters, the Company and their respective successors
     and legal representatives. Nothing expressed or mentioned in this Agreement
     is intended or shall be construed to give any person other than the persons
     mentioned in the preceding sentence any legal or equitable right, remedy or
     claim under or in respect of this Agreement, or any provisions herein
     contained, this Agreement and all conditions and provisions hereof being
     intended to be and being for the sole and exclusive benefit of such persons
     and for the benefit of no other person; except that the representations,
     warranties, covenants, agreements and indemnities of the Company contained
     in this Agreement shall also be for the benefit of the person or persons,
     if any, who control any Underwriter or Underwriters within the meaning of
     Section 15 of the Securities Act or Section 20 of the Exchange Act, and the
     indemnities of the several Underwriters shall also be for the benefit of
     each director of the Company, each of its officers who has signed the
     Registration Statement and the person or persons, if any, who control the
     Company within the meaning of Section 15 of the Securities Act or Section
     20 of the Exchange Act. 

15.  APPLICABLE LAW. This Agreement shall be governed by and construed in
     accordance with the laws of the State of New York without regard to its
     conflict of laws rules. 

16.  AUTHORITY OF THE REPRESENTATIVES. In connection with this Agreement, you
     will act for and on behalf of the several Underwriters, and any action
     taken under this Agreement by Cowen, as Representative, will be binding on
     all the Underwriters. 

17.  PARTIAL UNENFORCEABILITY. The invalidity or unenforceability of any
     Section, paragraph or provision of this Agreement shall not affect the
     validity or enforceability of any other Section, paragraph or provision
     hereof. If any Section, paragraph or provision of this Agreement is for any
     reason determined to be invalid or unenforceable, there shall be deemed to
     be made such minor changes (and only such minor changes) as are necessary
     to make it valid and enforceable. 

18.  GENERAL. This Agreement constitutes the entire agreement of the parties to
     this Agreement and supersedes all prior written or oral and all
     contemporaneous oral agreements, understandings and negotiations with
     respect to the subject matter hereof. In this Agreement, the masculine,
     feminine and neuter genders and the singular and the plural include one
     another. The section headings in this Agreement are for the convenience of
     the parties only and will not affect the construction or interpretation of
     this Agreement. This Agreement may be amended or modified, and the
     observance of any term of this Agreement may be waived, only by a writing
     signed by the Company and the Representatives. 

19.  COUNTERPARTS. This Agreement may be signed in two (2) or more counterparts,
     each of which shall be an original, with the same effect as if the
     signatures thereto and hereto were upon the same instrument. 

     If the foregoing correctly sets forth our understanding, please indicate
     your acceptance thereof in the space provided below for that purpose,
     whereupon this letter and your acceptance shall constitute a binding
     agreement between us.

<PAGE>   20
                                       20


                                 Very truly yours,

                                 GLIATECH INC.


                                 By:
                                     --------------------------------
                                      Thomas O. Oesterling, Ph.D.,
                                      President


Accepted and delivered in 
New York, New York, as of 
the date first above written.

COWEN & COMPANY
FURMAN SELZ LLC
VECTOR SECURITIES INTERNATIONAL , INC.

     Acting on their own behalf 
     and as Representatives of several 
     Underwriters referred to in the 
     foregoing Agreement.

     By: COWEN & COMPANY
     By: Cowen Incorporated,
         its general partner
     By: 
         ----------------------------------
         John P. Dunphy
         Managing Director - Syndicate



<PAGE>   1
                                                                     Exhibit 5.1
                                                                     -----------

                           JONES, DAY, REAVIS & POGUE
                                   North Point
                               901 Lakeside Avenue
                              Cleveland, Ohio 44114

                                  June 18, 1998

Gliatech Inc.
23420 Commerce Park Road
Cleveland, Ohio  44122

         Re:      Public Offering of up to 2,300,000 shares of Common Stock,
                  $0.01 par value per share, of Gliatech Inc.
                  ----------------------------------------------------------

Gentlemen:

                  We are acting as counsel for Gliatech Inc., a Delaware
corporation (the "Company"), in connection with the public offering by the
Company of an aggregate of up to 2,300,000 shares (the "Shares") of Common
Stock, $0.01 par value per share, of the Company in accordance with the terms
and conditions of an Underwriting Agreement (the "Underwriting Agreement") to be
entered into among the Company, Cowen & Company, Furman Selz LLC and Vector
Securities International, Inc. as underwriters (the "Underwriters").

                  In our capacity as counsel to the Company, we have examined
such documents, records and matters of law as we have deemed necessary for
purposes of this opinion, and based thereupon we are of the opinion that the
Shares are duly authorized and, subject to the due approval of the specific
terms of the sale of the Shares by the Pricing Committee of the Board of
Directors of the Company, when issued and delivered by the Company to the
Underwriters pursuant to the Underwriting Agreement against payment of the
consideration as provided therein (and provided the consideration received by
the Company is at least equal to the par value of such shares), will be validly
issued, fully paid and nonassessable.

                  We hereby consent to the filing of this opinion as Exhibit 5.1
to the Registration Statement on Form S-3 filed by the Company to effect
registration of the Shares under the Securities Act of 1933, and to the
reference to us under the caption "Legal Opinions" in the prospectus
constituting a part of such Registration Statement.

                                            Very truly yours,

                                            /s/Jones, Day, Reavis & Pogue






<PAGE>   1
                                                                    Exhibit 23.2

                          Consent of Ernst & Young LLP



We consent to the reference to our firm under the caption "Experts" and to the
use of our report dated March 10, 1998, in Amendment No. 2 to the Registration
Statement (Form S-3 No. 333-52825) and related Prospectus of Gliatech Inc. for
the registration of 2,300,000 shares of its common stock.

We also consent to the incorporation by reference in Amendment No. 2 to the
Registration Statement (Form S-3 No. 333-52825) and related Prospectus of
Gliatech Inc. for the registration of 2,300,000 shares of its common stock of
our report dated March 10, 1998, with respect to the consolidated financial
statements of Gliatech Inc. included in its Annual Report (Form 10-K) for the
year ended December 31, 1997 and for the period from inception of operations
(August 31, 1988) through December 31, 1997, filed with the Securities and
Exchange Commission.



                                                /s/ERNST & YOUNG LLP

Cleveland, Ohio
June 18, 1998



<PAGE>   1
                                                                    Exhibit 23.3



                               CONSENT OF COUNSEL

     The undersigned hereby consents to the use of our name and the statement
with respect to us appearing under the heading "Experts" in Amendment No. 2 to
the Registration Statement on Form S-3 of Gliatech Inc.





/s/ PENNIE & EDMONDS LLP

New York, New York
June 18, 1998




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