CENTOCOR INC
10-K, 1998-02-13
IN VITRO & IN VIVO DIAGNOSTIC SUBSTANCES
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                                 UNITED STATES
                      SECURITIES AND EXCHANGE COMMISSION
                            WASHINGTON, D.C. 20549
 
                                   FORM 10-K
 
  [X]  ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES
       EXCHANGE ACT OF 1934
 
                  FOR THE FISCAL YEAR ENDED DECEMBER 31, 1997
 
                                      OR
 
  [_]  TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES
       EXCHANGE ACT OF 1934
 
                  FOR THE TRANSITION PERIOD FROM      TO
 
                        COMMISSION FILE NUMBER 0-11103
 
                                CENTOCOR, INC.
            (EXACT NAME OF REGISTRANT AS SPECIFIED IN ITS CHARTER)
 
            PENNSYLVANIA                               23-2117202
   (STATE OR OTHER JURISDICTION OF      (I.R.S. EMPLOYER IDENTIFICATION NO.)
   INCORPORATION OR ORGANIZATION) 
   
 
          200 GREAT VALLEY PARKWAY                         19355-1307
                 MALVERN, PA                               (ZIP CODE)
   (ADDRESS OF PRINCIPAL EXECUTIVE OFFICES)
 
      REGISTRANT'S TELEPHONE NUMBER, INCLUDING AREA CODE: (610) 651-6000
 
SECURITIES REGISTERED PURSUANT TO SECTION 12(B) OF THE ACT:
 
          TITLE OF EACH CLASS           NAME OF EXCHANGE ON WHICH REGISTERED
                 None                              Not Applicable
 
SECURITIES REGISTERED PURSUANT TO SECTION 12(G) OF THE ACT:
 
                   SERIES A PREFERRED STOCK PURCHASE RIGHTS
                               (TITLE OF CLASS)
 
                    COMMON STOCK, PAR VALUE $.01 PER SHARE
                               (TITLE OF CLASS)
 
  Indicate by check mark whether the registrant (1) has filed all reports
required to be filed by Section 13 or 15(d) of the Securities Exchange Act of
1934 during the preceding 12 months (or for such shorter period that the
registrant was required to file such reports), and (2) has been subject to
such filing requirements for the past 90 days. Yes [X]  No [_]
 
  Indicate by check mark if disclosure of delinquent filers pursuant to Item
405 of Regulation S-K is not contained herein, and will not be contained, to
the best of registrant's knowledge, in definitive proxy or information
statements incorporated by reference in Part III of this Form 10-K or any
amendment to this Form 10-K. [_]
 
  The aggregate market value of the 69,585,224 shares of voting stock held by
non-affiliates of the registrant as of February 6, 1998 was $2,787,758,037.
 
  Common Stock outstanding at February 6, 1998: 70,178,634 shares.
 
                     DOCUMENTS INCORPORATED BY REFERENCE:
 
  Portions of the following document are incorporated by reference in this
Report on Form 10-K:
 
  Proxy Statement for the Annual Meeting of Shareholders to be held on May 13,
1998--Part III, Items 10, 11, 12 and 13.
 
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<PAGE>
 
                                    PART I
 
ITEM 1. BUSINESS
 
GENERAL
 
  Centocor, Inc. ("Centocor" or the "Company") is a biopharmaceutical company
the mission of which is to develop or otherwise acquire and commercialize
novel therapeutic and diagnostic products and services that solve critical
needs in human healthcare, with a primary technology focus on monoclonal
antibodies and DNA-based products.
 
  The Company has two therapeutic products approved for sale and several
product candidates in various stages of development. ReoPro(R) (Abciximab) is
marketed by Eli Lilly and Company ("Lilly") and sold in the United States and
Europe for the reduction of acute ischemic cardiac complications in patients
undergoing percutaneous coronary intervention ("PCI") such as angioplasty
procedures, and for those patients with unstable angina who are refactory to
conventional therapy for whom PCI is planned within twenty-four hours.
Panorex(R) (Edrecolomab) is marketed by Glaxo Wellcome plc and sold in Germany
as an adjuvant therapy in the treatment of post-operative colorectal cancer.
The Company has filed a Biologics License Application ("BLA") with the Food
and Drug Administration ("FDA") for Avakine(TM) for the treatment of moderate
to severe Crohn's disease, including fistulizing Crohn's disease. The Company
also is conducting studies for Avakine in the treatment of rheumatoid
arthritis. Panorex and Avakine (Infliximab) are trademarks of Centocor. ReoPro
is a trademark of Lilly. The Company also markets several diagnostic products
for cancer in the United States, Europe and Japan and has a cardiovascular
diagnostic product candidate under development.
 
  At December 31, 1997, Centocor had approximately 640 full-time employees. To
complement its own expertise in various fields, Centocor utilizes scientific
consultants and other advisors, many of whom have formal consulting agreements
with Centocor.
 
  Centocor was incorporated in Pennsylvania in 1979 and maintains its
principal executive offices at 200 Great Valley Parkway, Malvern,
Pennsylvania, 19355. Its telephone number is (610) 651-6000. The Company also
maintains facilities in Leiden, The Netherlands, and an office in Tokyo,
Japan.
 
  This annual report on Form 10-K and the documents incorporated herein by
reference contain forward- looking statements that have been made pursuant to
the provisions of the Private Securities Litigation Reform Act of 1995. Such
forward-looking statements are based on current expectations, estimates and
projections about the company's industry, management's beliefs and certain
assumptions made by the Company's management. Investors are cautioned that
matters subject to forward-looking statements involve risks and uncertainties
including economic, competitive, governmental, technological and other factors
which may affect the Company's business and prospects. Words such as
"anticipates," "expects," "intends," "plans," "believes," "seeks,"
"estimates," variations of such words and similar expressions are intended to
identify such forward-looking statements. These statements are not guarantees
of future performance and are subject to certain risks, uncertainties and
assumptions that are difficult to predict. Such risks and uncertainties
include those associated with (i) the timing, completion and outcome of
clinical trials for, regulatory approval of and market acceptance of the
Company's products; (ii) the strength of the Company's patent position; (iii)
the Company's plan to forward integrate into direct commercialization of
certain products; (iv) the Company's ability to construct and maintain
manufacturing facilities that meet regulatory requirements and satisfy the
Company's inventory needs; (v) the Company's dependence on its collaborative
partners; (vi) uncertainties regarding health care reform and reimbursement
from third party payors; (vii) changes in the competitive environment in which
the Company operates; (viii) the outcome of pending litigation and (ix) the
potential for product liability claims. Therefore, actual results may differ
materially from those expressed or forecasted in any such forward-looking
statements. Unless required by law, the Company undertakes no obligation to
update publicly any forward-looking statements, whether as a result of new
information, future events or otherwise.
 
                                       1
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COMPANY STRATEGY
 
  The Company's strategy is to identify proprietary high value-added product
opportunities, and to commercialize those opportunities by focusing on
clinical development, manufacturing and market development. The Company seeks
to license or otherwise acquire technology and product candidates from
research institutions and other sources, in addition to conducting selected
basic research. In an effort to reach the market in an expeditious manner, and
establish itself as the market leader, the Company's clinical development and
regulatory strategy for its therapeutic products under development is to
pursue initial approval for a narrowly defined indication. The Company then
seeks to expand the indication for which the products may be marketed by
conducting additional clinical trials and providing health economic data in
support of the product's utility.
 
  Consistent with its strategy, the Company maintains and generally seeks
strategic alliances with major pharmaceutical companies for the
commercialization and marketing of certain of its therapeutic products,
pursuant to which the Company and its respective partner jointly focus on the
continued clinical and market development for the product, while the Company's
partner primarily conducts the marketing, promotion and distribution of such
product. The Company maintains and seeks distribution agreements for its
diagnostic products with companies having established positions and
distribution networks in applicable market segments. The Company may directly
market and promote one or more products in the United States in the future.
The Company intends to undertake directly the marketing in the United States
of Avakine and its cardiovascular diagnostic candidate.
 
RECENT DEVELOPMENT--PENDING ACQUISITION OF RETAVASE
 
  General. The Company has entered into a definitive agreement (the "Purchase
Agreement") with Roche Healthcare Limited ("Roche Healthcare"), a Bermuda
corporation and a subsidiary of Roche Holding Ltd., a Swiss corporation
("Roche"), to acquire the exclusive United States and Canadian product rights
for Retavase (releplase), a leading acute-care cardiovascular drug, and other
related assets (collectively, the "Retavase Assets") for $335,000,000 in cash
(the "Acquisition"). Retavase is a fibrinolytic ("clot-buster") product, which
is administered usually in the hospital emergency room, for the treatment of
acute myocardial infarction (heart attack). Retavase activates plasminogen,
which in turn cleaves fibrin, the substance which binds clots. The drug is
produced by a recombinant DNA process.
 
  The Company has the opportunity to acquire the Retavase Assets because Roche
is expected to divest them as a condition of Roche's acquisition of Corange
Limited ("Corange"), the parent company of Boehringer Mannheim GmbH
("Boehringer Mannheim"), which currently owns the Retavase Assets. Roche owns
a majority interest in Genentech, Inc. ("Genentech"), the maker of Activase, a
competing product. Centocor is named as an approved purchaser of Retavase
Assets in a proposed consent decree submitted to the Federal Trade Commission
("FTC") by Roche (the "Consent Decree"). Consummation of the Acquisition is
dependent on FTC acceptance of the Consent Decree, completion by Roche of the
Corange transaction and satisfaction of certain other regulatory requirements
and customary closing conditions. Subject to fulfillment of these conditions,
Centocor expects the Acquisition to close late in the first quarter of 1998.
There can be no assurance, however, that the Acquisition will close during the
first quarter of 1998 or at all.
 
  Retavase was approved by the Food and Drug Administration ("FDA") for sale
in the United States in 1996 and was launched by Boehringer Mannheim in
January 1997. Retavase has been shown in clinical trials to be comparable in
its efficacy and safety profile to Activase, the present market leader. In the
GUSTO III clinical trial, a large clinical trial in which Retavase was
compared to Activase, the overall mortality rate for Retavase was 7.43%
compared to 7.22% for Activase; the total intracrannial hemorrhage rate for
Retavase was 0.91% compared to 0.88% for Activase; and the total stroke rate
for Retavase was 1.67% and 1.83% for Activase. Retavase has the important
advantage of being administered through bolus injections rather than the more
complicated infusion administration required for Activase. Based on industry
data, Centocor believes that Retavase achieved a 12% share of the United
States fibrinolytics market in 1997, a market which is estimated to be
approximately $300,000,000 in sales. Approval for sale of the drug in Canada
was granted in 1997. The Company plans to distribute Retavase in Canada
through a partner, and currently is evaluating possible alliances.
 
  Centocor believes that the Acquisition provides a rare strategic
opportunity. It will enhance Centocor's role in the cardiovascular field,
building on the growing use of ReoPro, Centocor's drug for preventing artery
 
                                       2
<PAGE>
 
reclosure in conjunction with angioplasty. With Retavase, a product early in
its life cycle, Centocor would add to its portfolio a clot-busting drug
appropriate for use in the hospital emergency room.
 
  The Acquisition also provides the Company with the opportunity to accelerate
its forward integration in the marketplace. Centocor has extended offers of
employment, conditioned on closing of the Acquisition, to many of the
Boehringer Mannheim sales personnel who have been successful in launching
Retavase and increasing its market share. The Company expects to co-promote
Retavase with DuPont Merck Pharmaceutical Company ("DuPont Merck") pursuant to
an assignment of DuPont Merck's existing agreement with Boehringer Mannheim.
Ultimately, approximately 200 Centocor employees may be involved in the
commercialization of Retavase.
 
  Because of the complementary nature of Retavase and ReoPro in the
cardiovascular field, the Company believes the joint promotion of Retavase and
ReoPro could result in increased market penetration for ReoPro. Accordingly,
the Company has agreed in principle with Lilly to jointly promote ReoPro
following closing of the Acquisition through Lilly's existing ReoPro sales
force and the Company's Retavase sales force.
 
  The Company believes a further advantage of the Acquisition lies in the
possibility that ReoPro and Retavase, administered in combination, will prove
to have a therapeutic advantage over monotherapy for acute myocardial
infarction patients. Two Phase II clinical trials currently are underway to
evaluate the approach of using a product such as ReoPro in conjunction with a
fibrinolytic product in the management of heart attack patients. There can be
no assurance, however, that a ReoPro/Retavase combination therapy will prove
to be safe and effective, will receive FDA approval or, even if approved,
ultimately will achieve market acceptance.
 
  Finally, Retavase would complement the current plans of Centocor's
subsidiary, Centocor Diagnostics, Inc., to develop and commercialize a
platelet-activation diagnostic test that is intended to aid in the
identification of heart attack patients from among those presenting with chest
pains in the hospital emergency room.
 
  Purchase Agreement. Of the $335,000,000 purchase price under the Purchase
Agreement, Centocor will pay Roche Healthcare $315,000,000 to acquire
assignments or licenses of patents and patent applications, trademarks,
product registrations, manufacturing technology and know-how, research and
development materials and various Boehringer Mannheim contracts necessary to
manufacture Retavase and to sell it in the United States and Canada. Centocor
also will acquire various tangible assets and databases used by Boehringer
Mannheim in its commercialization of the product in the United States.
Additionally, Centocor will place $20,000,000 of the purchase price in escrow
(the "Escrow Amount"), as described below. The terms of this escrow under
which the Escrow Amount will be handled are to be set forth in an arrangement
to be negotiated in good faith by Centocor and Roche Healthcare. Centocor also
will pay an agreed unit price for the existing inventory of Retavase in the
United States.
 
  The Purchase Agreement requires that Centocor establish and qualify, either
directly or through contract manufacturers, arrangements for the manufacture
of Retavase for sale in the United States within four years of the
consummation of the Acquisition (subject to extension by the FTC for up to two
additional one year periods if it appears that the required FDA approvals are
likely to be obtained within such extended time period) (the "Transfer
Period"). Under the Purchase Agreement, Centocor will be entitled to a refund
of the Escrow Amount upon the achievement of certain manufacturing milestones.
Roche will cooperate in Centocor's establishment of manufacturing arrangements
by providing training and other assistance and has agreed to maintain assets
sufficient to supply Retavase for the Transfer Period. Centocor must be
successful in establishing such manufacturing arrangements by the end of the
Transfer Period or the Retavase Assets will revert to Roche, which must then
divest them to another party.
 
  The FTC may terminate the Purchase Agreement and the Retavase Assets would
revert to Roche if the Company (i) voluntarily ceases for at least sixty (60)
days to sell or pursue good faith efforts to sell Retavase in the United
States at any time prior to obtaining all necessary FDA approvals to
manufacture Retavase for sale in the United States (the "FDA Approvals"); (ii)
fails to pursue good faith efforts to obtain the FDA Approvals; or (iii) fails
to obtain the FDA Approvals within four years of the date of the Consent
Decree.(subject to extension by the FTC for up to two additional one year
periods if it appears that the required FDA approvals are likely to be
obtained within such extended time period) In such events, Centocor would not
be refunded the purchase price. In addition, the FTC may withdraw its approval
after the expiration of the required 60-day public comment period. In the
event the FTC so withdraws its approval, the
 
                                       3
<PAGE>
 
Acquisition would be unwound, and the Company would transfer back to Roche
Healthcare the Retavase Assets and Roche Healthcare would refund the purchase
price to the Company.
 
  In the event that Centocor commercializes any product (other than Retavase)
using any of the patents included in the Retavase Assets or otherwise exploits
the rights it acquires from Roche with respect to a product other than
Retavase, the Company will be required to pay Roche a royalty based on a
percentage of the net sales of any such products or a percentage of the
royalties received by the Company in respect of such products.
 
  The Purchase Agreement contains customary representations and warranties, as
well as indemnification provisions relating to breaches of representations and
warranties and certain other obligations of the parties.
 
  Description of Genentech Patent Suits. In a suit filed in the United States
District Court for the District of Massachusetts, Genentech charges Boehringer
Mannheim GmbH and Boehringer Mannheim Corporation with infringement of five
patents. The Court directed the parties to address initially three of the
patents (United States Patents Nos. 4,432,832, 5,034,225 and 4,511,502),
reserving two for later disposition (United States Patents No. 5,221,619 and
5,185,259).
 
  The defendants have denied infringement and raised various affirmative
defenses and counterclaims. Genentech seeks judgment of infringement, an
injunction, treble damages, and costs including attorney's fees. Defendants
seek a declaration of invalidity, unenforceability and non-infringement,
damages under the antitrust laws and a state statute and costs, including
attorney's fees.
 
  The Court conducted a Markman hearing as to the first three patents in order
to construe the claims of the patents and subsequently issued an opinion and
order which has limited the construction of the claims advanced by Genentech.
Thereafter, the Court entertained argument on motions by the defendants for
summary judgment as to the same three patents, but has not yet issued an
opinion. It is not clear, therefore, whether there will be issues which must
be tried.
 
  The patent litigation in Germany consists of a number of different
proceedings: 1) an infringement suit by Genentech and its licensee against
Boehringer Mannheim GmbH based on the European patent EP 0 093 619 and an
extension based on patents EP 0 217 379 and EP 0 228 862; 2) a nullity suit by
Boehringer Mannheim against the patent EP 0 093 619; 3) a nullity suit by
Boehringer Mannheim against the patent EP 0 217 379; and 4) an appeal by
Boehringer Mannheim from the decision of the European Patent Office arising
from Boehringer Mannheim's opposition to the patent EP 0 228 862. The nullity
suits and the opposition appeal challenge the validity of the patents in issue
or seek construction of the claims in a manner which would exclude Retavase.
 
  The infringement suit based on the patent EP 0 093 619 has been stayed
pending the outcome of the corresponding nullity action. A hearing that was to
take place in the nullity action in February 1998 has been postponed. The
Court in the infringement action based on patents EP 0 217 379 and EP 0 228
862 has directed certain questions to an expert yet to be appointed. No report
is expected from the expert until at least the end of 1998. A July 1998
hearing date has been fixed on Boehringer Mannheim's nullity suit against the
patent EP 0 217 379 but no date has been set for or the appeal in the
opposition proceedings with regard to patent EP 0 228 862.
 
  If any of the German patent proceedings remain pending at the date when
Centocor is no longer dependent on the supply of Retavase by Boehringer
Mannheim, the defense and risk of the remaining proceedings will revert to
Boehringer Mannheim.
 
  Under the Purchase Agreement, Centocor will be required to assume
responsibility for Retavase-related patent infringement litigation instituted
in the United States and Germany against Boehringer Mannheim by Genentech. The
cost of such litigation will be shared equally by Roche and the Company and
Roche is committed
 
                                       4
<PAGE>
 
to assist Centocor in the litigation by making available, at Roche's expense,
witnesses and documents. If, as a result of (i) a binding determination
(including a permanent, temporary or preliminary injunction for so long as
such injunction is not stayed or vacated) in connection with the Genentech
Patent Litigation (a "Binding Determination") or (ii) a settlement of the
Genentech Patent Litigation (a "Settlement"), the Company is unable during the
life of the relevant Genentech patents to engage in the manufacture or sale of
Retavase in the United States and Canada, Roche Healthcare would be required
to reimburse to the Company up to 100% of the purchase price under the
Purchase Agreement (excluding the Escrow Amount) depending upon the length of
the period for which the Company's manufacturing and sale activities are
prohibited. Furthermore, Roche Healthcare would be required under the Purchase
Agreement to indemnify the Company for (i) any damages (including lost
profits) and (ii) any reasonable royalty payments, for which the Company may
become liable to Genentech as a result of a Binding Determination or a
Settlement. Roche Healthcare's total purchase price reimbursement and
indemnification obligations relating to the Genentech Patent Litigation are
limited to an aggregate of 125% of the total purchase price under the Purchase
Agreement, excluding any portion of the Escrow Amount previously returned to
the Company. In the event the governance agreement between Roche and Genentech
allows Roche to control Genentech or in the event Roche obtains 100% of the
stock of Genentech, Roche will cause the patent litigation to be dismissed
with prejudice and will cause Genentech not to institute any additional
infringement litigation relating to Retavase.
 
  In addition to the indemnification and purchase price reimbursement
arrangements relating to the pending Genentech litigation, Roche Healthcare
will indemnify Centocor against certain other future infringement claims
related to Retavase by third parties (if any), subject to certain limitations;
and Roche further agrees that it will not institute Retavase-related claims
based on any Roche patents or patent applications existing as of the closing
date.
 
  Supply Agreement and Transition Services Agreement. During the Transfer
Period, Boehringer Mannheim will continue to supply Retavase to Centocor from
its facilities in Germany at an agreed price per unit pursuant to an agreement
to be executed and delivered at or before the closing of the Acquisition (the
"Supply Agreement"). In the Supply Agreement, Boehringer Mannheim will
represent and warrant that the products supplied to Centocor will meet FDA
approved specifications and will provide the Company with customary
indemnities, including for damages that result from the failure of the product
to meet FDA approved specifications.
 
  In addition to the Supply Agreement, for a period of up to six months after
closing, Boehringer Mannheim will provide certain transition services to
Centocor, including accepting orders and invoices on behalf of Centocor,
collection services and customer complaints and inquiries, to facilitate the
transfer of responsibility for sale and distribution of the product.
 
  Keep Well Agreement. Pursuant to the terms of the Purchase Agreement, Roche
will execute and deliver a keep well agreement (the "Keep Well Agreement")
with Roche Healthcare. Under the Keep Well Agreement,
 
                                     4--1
<PAGE>
 
Roche will be required to own directly or indirectly all of the outstanding
shares of stock of Roche Healthcare having the right to vote for members of
the Board of Directors of Roche Healthcare. Roche also will be required to
cause Roche Healthcare to maintain a consolidated net worth of at least
$1,000,000 at all times. The Keep Well Agreement may be modified, amended or
terminated by the written agreement of Roche and Roche Healthcare; provided,
however, that no such modification, amendment or termination shall have any
adverse effect on the ability of Roche Healthcare to meet its obligations to
the Company under the indemnity provisions of the Purchase Agreement without
the written consent of the Company. The Keep Well Agreement will be governed
by the laws of Bermuda. The Keep Well Agreement will not constitute a
guarantee by Roche of the payment of any obligation, indebtedness or liability
of Roche Healthcare. The Company is not a party to the Keep Well Agreement and
will have no right to enforce the Keep Well Agreement against Roche.
 
  Financing. Consummation of the Acquisition is not conditioned upon the
receipt by the Company of financing sufficient to fund the purchase price. The
Company has, however, received a commitment letter from a leading investment
bank pursuant to which such investment bank has committed to purchase from
Centocor securities in an amount sufficient to provide $335,000,000 of net
proceeds to the Company. The Company intends to finance the Acquisition
through the issuance of Convertible Subordinated Debentures in an unregistered
offering. See "--Unaudited Pro Forma Condensed Consolidated Financial Data."
 
  Risks. There are specific risks associated with the Acquisition. The
transaction may not close or, even if closed, it may have to be unwound if,
after the sixty day notice and comment period following FTC acceptance of the
agreement with Roche containing the Consent Decree, the FTC withdraws its
consent. Because of competitive reasons, product acceptance, cost
reimbursement or other reasons, Retavase may not achieve and maintain sales
levels sufficient to enable Centocor to reach its financial targets with
respect to the product. While Centocor believes that the acquisition of
Retavase will strengthen its ReoPro position and sales and will permit
Centocor to realize other benefits described previously, there can be no
assurance that any such benefits will be achieved. Notwithstanding the
indemnification and cost reimbursement commitments of Roche Healthcare, there
can be no assurance that Centocor will not suffer adverse consequences on
account of the Genentech patent infringement litigation referred to above.
There can be no assurance that Centocor will be successful in transferring the
manufacture of Retavase from Boehringer Mannheim within the four year period
(and any extensions) provided in the agreement with Roche Healthcare and under
the proposed Consent Decree. In that event, the Retavase Assets would revert
to Roche, which would then have to divest them to another party. And, there
can be no assurance that the patent applications and patent application
licenses relating to Retavase to be transferred to the Company will result in
patents being issued or that the transferred patents, patent applications and
patent licenses will afford protection against competitors with similar
technology. And, there can be no assurance that third parties will not assert
intellectual property claims, in addition to the Genentech Litigation, that
could adversely affect the Company's ability to manufacture, use and sell
Retavase.
 
                                       5
<PAGE>
 
           UNAUDITED PRO FORMA CONDENSED CONSOLIDATED FINANCIAL DATA
 
  The following unaudited pro forma condensed consolidated financial data (the
"Pro Forma Financial Data") have been derived by the application of pro forma
adjustments to the historical financial statements of the Company for 1997.
The unaudited pro forma consolidated statement of operations data for the year
ended December 31, 1997 assumes the Acquisition and the related financing had
occurred as of the beginning of the year. The unaudited pro forma condensed
consolidated balance sheet as of December 31, 1997 assumes the Acquisition and
the related financing occurred on that date.
 
  The pro-forma adjustments are based upon certain historical unaudited
financial information of the Retavase business and on certain Company
estimates of expenses it would have incurred had the Acquisition occurred as
of the beginning of the year. The adjustments to the pro forma consolidated
statement of operations data exclude the effects of (i) the write off of
acquired in-process research and development of approximately $138,500,000 and
(ii) a tax benefit of approximately $20,000,000. The pro forma adjustments are
described in the accompanying notes.
 
  The Pro Forma Financial Data is subject to numerous assumptions and
estimates that are subject to change and, in many cases, are beyond the
control of the Company. The Pro Forma Financial Data do not purport to
represent what the Company's results of operations would have been if the
Acquisition had occurred as of the date indicated or what results will be for
any future periods. The Pro Forma Financial Data should be read in conjunction
with the historical financial statements of the Company and the notes thereto
and "Management's Discussion and Analysis of Financial Condition and Results
of Operations" included elsewhere in this Annual Report on Form 10-K.
 
                                       6
<PAGE>
 
                                CENTOCOR, INC.
 
              PRO FORMA CONSOLIDATED STATEMENT OF OPERATIONS DATA
                (UNAUDITED, IN THOUSANDS EXCEPT PER SHARE DATA)
 
<TABLE>
<CAPTION>
                                        YEAR ENDED DECEMBER 31, 1997
                                   -----------------------------------------
                                   CENTOCOR, INC.  PRO FORMA
                                     HISTORICAL   ADJUSTMENTS    AS ADJUSTED
                                   -------------- -----------    -----------
<S>                                <C>            <C>            <C>
Revenues:
  Sales...........................    $196,354      $44,800 (1)   $241,154
  Contracts.......................       4,430          --           4,430
                                      --------     --------       --------
                                       200,784       44,800        245,584
Costs and Expenses:
  Costs of sales..................      77,958        5,400 (2)     83,358
  Research and development........      68,623        3,900 (3)     72,523
  Marketing, general and
   administrative.................      40,917       59,600 (4)    100,517
                                      --------     --------       --------
                                       187,498       68,900        256,398
Other income (expenses):
  Interest income.................       9,607          --           9,607
  Interest expense................      (3,938)     (21,000)(5)    (24,938)
  Loss on sale of facility and
   related business...............      (4,565)         --          (4,565)
  Other...........................      (3,260)         --          (3,260)
                                      --------     --------       --------
                                        (2,156)     (21,000)       (23,156)
                                      --------     --------       --------
Net income (loss).................    $ 11,130     $(45,100)      $(33,970)
                                      ========     ========       ========
Basic earnings (loss) per share...    $   0.16                    $  (0.49)
                                      ========                    ========
Diluted earnings (loss) per
 share............................    $   0.16                    $  (0.49)
                                      ========                    ========
Weighted average number of shares
 outstanding......................      69,809                      69,809
                                      ========                    ========
Weighted average common and
 dilutive equivalent shares
 outstanding......................      71,770                      69,809 (6)
                                      ========                    ========
</TABLE>
- --------
(1) Based on historical sales information for 1997.
(2) Based on (i) the pricing structure in the Supply Agreement to be entered
    into by Centocor and Boehringer Mannheim and (ii) royalty agreements
    currently in place with respect to the product.
(3) Based on estimated increases in costs associated with additional quality
    assurance and regulatory personnel.
(4) Adjustments to marketing, general and administrative expenses reflect the
    following:
  (i) $21,700 represents the estimated increase in product salesforce and
      related costs.
  (ii) $17,000 represents 1997 historic external marketing and promotional
       costs.
  (iii) $13,300 represents (a) increased amortization expense related to
        $176,500 of intangible assets acquired (based on the product purchase
        price of $335,000 less the $20,000 escrow deposit less an estimated
        one time charge for in-process research and development of $138,500
        and an average useful life of fifteen years) and (b) amortization of
        $10,500 in assumed debt issuance costs over 7 years.
  (iv) $6,100 represents estimated 1997 expenses based on the co-promotional
       agreement currently in place with DuPont Merck.
  (v) $1,500 represents estimated 1997 expenditures related to patent
      litigation.
(5) Represents interest expense on $350,000 of convertible subordinated
    debentures at an assumed interest rate of 6%; does not reflect any
    interest expense that would be incurred upon the exercise of any over-
    allotment option.
(6) The as adjusted share amount does not assume the exercise of stock options
    or warrants as their effect would be antidilutive.
 
                                       7
<PAGE>
 
                                 CENTOCOR, INC.
 
                 PRO FORMA CONDENSED CONSOLIDATED BALANCE SHEET
                           (UNAUDITED, IN THOUSANDS)
 
<TABLE>
<CAPTION>
                                              AS OF DECEMBER 31, 1997
                                       -----------------------------------------
                                       CENTOCOR, INC.  PRO FORMA
                                         HISTORICAL   ADJUSTMENTS    AS ADJUSTED
                                       -------------- -----------    -----------
<S>                                    <C>            <C>            <C>
Assets
Current assets
  Cash and cash equivalents...........    $ 85,565     $  4,500 (1)   $ 90,065
  Short-term investments..............     109,108          --         109,108
  Other current assets................      60,172          --          60,172
                                          --------     --------       --------
                                           254,845        4,500        259,345
Property, plant and equipment, net....      77,014          --          77,014
Long-term investments.................      11,957          --          11,957
Intangible and other assets...........      61,288      207,000 (2)    268,288
                                          --------     --------       --------
Total Assets..........................     405,104      211,500        616,604
                                          ========     ========       ========
Liabilities and Shareholders' Equity
Current liabilities
  Accounts payable....................    $ 15,651          --        $ 15,651
  Accrued expenses and other current
   liabilities........................      70,003          --          70,003
  Notes payable.......................       5,940          --           5,940
                                          --------     --------       --------
                                            91,594          --          91,594
Long-term debt........................      54,765      350,000 (3)    404,765
Other liabilities.....................         910          --             910
Shareholders' equity..................     257,835     (138,500)(4)    119,335
                                          --------     --------       --------
Total Liabilities and Shareholders'
 Equity...............................     405,104      211,500        616,604
                                          ========     ========       ========
</TABLE>
- --------
(1) Represents the cash proceeds from the issuance of $350,000 in convertible
    subordinated debentures, net of estimated issuance costs of $10,500, less
    the $335,000 paid under the Purchase Agreement.
(2) Represents acquired intangibles and an escrow deposit based on the product
    purchase price of $335,000 less an estimated one time charge for in-process
    research and development of $138,500, and debt issuance costs of $10,500.
(3) Represents the issuance of $350,000 in convertible subordinated debentures.
(4) Represents a one time charge of $138,500 for acquired in-process research
    and development.
 
                                       8
<PAGE>
 
PRODUCTS AND PRODUCTS UNDER DEVELOPMENT
 
  The following table summarizes Centocor's products and selected product
candidates. This table is qualified in its entirety by reference to the more
detailed descriptions included elsewhere in this Annual Report on Form 10-K.
 
<TABLE>
<CAPTION>
 PRODUCT/PRODUCT CANDIDATE        INDICATION                          STATUS (1)
 -------------------------        ----------                          ----------
 <C>                       <S>                        <C>
 THERAPEUTIC:
    ReoPro..............   Percutaneous Coronary      Marketed (U.S., Europe)
                           Intervention (PCI)
                           High risk angioplasty      Phase II (Japan)
                           Unstable angina (U.A.)     Marketed (U.S., Europe)
                           when PCI planned
                           Acute myocardial           Phase II
                           infarction
                           Adjuvant therapy with      Phase III
                           stents
                           Stroke                     Phase II
                           Medical treatment of       Phase III planned
                           U.A.
    Panorex.............   Adjuvant therapy for       Marketed (Germany)
                           post-operative             Phase III (U.S., Europe)
                           colorectal cancer
    Avakine.............   Moderate to severe         BLA filed (U.S.)
                           Crohn's disease
                           including fistula
                           Chronic Crohn's disease    Phase III (planned)
                                                      Phase II (Japan)
                           Chronic rheumatoid         Phase III
                           arthritis
                                                      Phase II (Japan)
    Corsevin M..........   Thrombosis                 Phase I
    Gene Vaccines.......   Colorectal cancer (CEA)    Phase I
                           Prostate cancer (PSA)      Phase I planned
                           Lung cancer (MUC-1)        Phase I planned
- --------
(1) Phase III clinical trial indicates that the product is being tested in
    humans for safety and efficacy in an expanded patient population at
    multiple clinical sites. Phase I and Phase II clinical trials indicate
    that the product is being tested in humans to evaluate safety, dosage and,
    to some extent, efficacy, in a limited patient population.
 
<CAPTION>
 PRODUCT/PRODUCT CANDIDATE        INDICATION                            STATUS
 -------------------------        ----------                            ------
 DIAGNOSTIC:
 <C>                       <S>                        <C>
    CA 125 II...........   Ovarian cancer
                           monitoring                 Marketed (U.S., Europe, Japan)
    CA 19-9.............   Pancreatic cancer
                           monitoring                 Marketed (Europe, Japan)
    CA 15-3.............   Breast cancer monitoring   Marketed (U.S., Europe, Japan)
    CA 72-4.............   Gastrointestinal cancer
                           monitoring                 Marketed (Europe, Japan)
    P-glycoCHEK.........   Resistance to chemo-       Sold for investigational use (Europe, Japan)
                            therapeutic drug
                            detection
    CYFRA 21-1..........   Non-small cell lung        Marketed (Europe, Japan)
                           cancer
    P-selectin Profile..   Platelet function          Clinical development
                           monitoring
</TABLE>
 
 Therapeutic Products
 
  Sales of the Company's therapeutic products were approximately $164,577,000
and $90,742,000 for the years ended December 31, 1997 and 1996, respectively.
 
                                       9
<PAGE>
 
  ReoPro(R) (Abciximab). ReoPro is a chimeric monoclonal antibody fragment
that binds to GP IIb/IIIa receptors on the surface of platelets, thereby
inhibiting platelet aggregation. When platelets are stimulated, a number of
different types of surface receptors are exposed that cause further platelet
aggregation, including the glycoprotein ("GP") IIb/IIIa receptors. Anti-
platelet agents such as ReoPro are used in the treatment of cardiovascular
disease to prevent blood clots. The three main markets for these agents are
PCI, unstable angina and heart attack. Effective platelet inhibiting treatment
has been shown to be effective in PCI and in unstable angina to prevent
resulting heart attacks and death. Abrupt reclosure during PCI can result in
death, myocardial infarction, the need for emergency coronary bypass surgery
or repeat PCI. Powerful agents are also needed to enhance treatment of
myocardial infarction by opening the clotted artery and preventing reocclusion
following drug therapy or PCI. ReoPro is effective in inhibiting blood
clotting by inhibiting the aggregation of platelets.
 
  Following the successful completion of the EPIC Phase III clinical trial of
ReoPro and subsequent U.S. Food and Drug Administration approval, the Company
commenced commercial sales of ReoPro in January 1995 for patients who are at
high risk for abrupt artery closure following angioplasty. In November 1997,
the Company announced that the FDA cleared the way for the expanded use of
ReoPro. The new labeling allows physicians to use ReoPro as adjunctive therapy
to prevent cardiac ischemic complications in a broad range of patients
undergoing PCI, as well as in unstable angina patients not responding to
conventional medical therapy for whom PCI is planned within twenty-four hours.
ReoPro is currently marketed in a number of countries within North America,
South America and Europe as well as several other markets throughout the
world. Under a Sales and Distribution Agreement between Lilly and the Company,
Lilly is the exclusive worldwide distributor of ReoPro except in Japan where
the product, if approved, will be exclusively distributed by Fujisawa
Pharmaceutical Co., Ltd. ("Fujisawa"). The Company plans to jointly promote
ReoPro in the United States with Lilly. See "Recent Developments" and
"Business--Marketing and Sales." Pursuant to those agreements, Lilly is
assisting the Company in the regulatory filings and continuing development of
ReoPro for additional clinical indications and Fujisawa is assisting the
Company in the regulatory filings and development of ReoPro in Japan.
 
  The expanded labeling for ReoPro is based on the results of two major
clinical studies, EPILOG and CAPTURE.
 
  EPILOG (Evaluation of PTCA to Improve Long-term Outcome by c7E3 GP IIb/IIIa
Receptor Blockade), published in June 1997 in The New England Journal of
Medicine, showed that a broad range of angioplasty patients treated with
ReoPro and low-dose, weight-adjusted heparin had more than a 50% relative
reduction at 30 days in their risk of the composite endpoint of death or heart
attack compared with placebo. In the ReoPro group, 3.8% of patients suffered
one of these events, compared with 9.1% of patients in the placebo group. The
clinical benefits of ReoPro were similar, irrespective of the type of coronary
intervention used (balloon angioplasty, atherectomy, stent placement).
 
  Results from the EPILOG trial show that bleeding, the most common side
effect associated with ReoPro therapy, can be reduced by the use of modified
dosing regimens and specific patient management techniques. In EPILOG, the
incidence of major bleeding in patients treated with ReoPro and low-dose,
weight-adjusted heparin was not significantly different from that in patients
receiving placebo.
 
  The CAPTURE (c7E3 Fab Anti-Platelet Therapy in Unstable Refractory Angina)
study, published in May 1997 in The Lancet, showed that in patients with
unstable angina who did not respond to conventional medical therapy, an 18-24
hour infusion of ReoPro prior to PCI and concluding one hour after the
procedure reduced the risk of the composite endpoint of death, heart attack or
the need for another emergency procedure such as repeat angioplasty or bypass
surgery by nearly 30%, compared with placebo, at 30 days.
 
  The Company and Lilly are evaluating other potential indications for ReoPro,
including the medical therapy of unstable angina, acute myocardial infarction
and thrombotic strokes. The Company is currently conducting two Phase II
trials with ReoPro in combination with thrombolytic therapy for patients
suffering acute myocardial infarction. Additionally, the Company and Lilly are
conducting the EPILOG Stent Phase III trial to evaluate the
 
                                      10
<PAGE>
 
effects of ReoPro in conjunction with stents. The Company and Fujisawa are
currently conducting Phase II clinical trials of ReoPro in Japan.
 
  The Company estimates that in the United States there were about 500,000
angioplasties performed last year. In addition, in the United States, the
annual incidence of unstable angina is about 1 million, acute myocardial
infarction (heart attack) 1 million, stroke 500,000 and peripheral vascular
disease 500,000. All of these procedures and/or conditions are impacted by
platelet activation and as a result, ReoPro may have utility.
 
  In addition to conducting studies to test the efficacy of ReoPro, the
Company has conducted a health economic study, based on the EPIC trial (high-
risk angioplasty), which has been cleared for promotional use by the FDA and
which indicates that the use of ReoPro is cost effective and may allow
hospitals to manage their resources more effectively and reduce the amount of
time patients spend in the hospital. In the EPILOG trial (all angioplasty),
major bleeding events in patients receiving ReoPro were at essentially the
same level as in patients receiving placebo. The decreased need for blood
transfusions may result in additional cost savings to hospitals.
 
  Avakine (TM) (Infliximab). The Company is currently developing Avakine, also
known as cA2, a chimeric monoclonal antibody that binds to tumor necrosis
factor alpha, which is believed to be critical to the human body's reaction to
inflammation. Avakine is primarily targeted for the treatment of rheumatoid
arthritis and inflammatory bowel diseases such as Crohn's disease. Avakine
works by binding to TNF-a on the cell membrane, neutralizing TNF-a in the
blood and destroying TNF-producing cells.
 
  In December 1997, the Company filed a Biologics License Application with the
U.S. Food and Drug Administration for Avakine for the treatment of moderate to
severe Crohn's disease, including fistulizing Crohn's disease. The Company
plans to file for regulatory approval in Europe during the first half of 1998.
 
  Crohn's disease is a chronic and debilitating disorder characterized by
inflammation of the gastrointestinal tract, and complicated, in some patients,
by the appearance of fistulas--painful extensions that occur between the bowel
and the skin, mostly in the perianal area, causing drainage of mucous and/or
fecal material.
 
  Clinical trial data were presented at the American College of
Gastroenterology meeting in November 1997 which showed that, following a
series of three infusions with 5 mg/kg, 68% of Avakine-treated Crohn's
patients experienced closure of at least 50% of fistulas for at least two
consecutive follow-up visits, (i.e. for at least one month) compared with 26%
of placebo patients (p=0.002). Similarly, 55% of patients treated with the
same drug regimen experienced closure of all their fistulas at one or more
follow-up visits compared with 13% of placebo patients (p=0.001). All of these
patients had previously failed standard treatment. Onset of clinical benefit
was rapid, with the vast majority of patients achieving a response within two
weeks. The average duration of closure was three months.
 
  Previous clinical trial results among patients with moderate to severe
Crohn's disease that had failed to respond to standard treatment were
published in the October 9, 1997 edition of The New England Journal of
Medicine. These data showed that after a single infusion of 5 mg/kg of
Avakine, 82% of patients achieved statistically significant improvement
(p<0.001) in disease activity (defined as a ^70 point reduction from baseline
in the Crohn's disease activity index (CDAI) at 4 weeks) and 48% of patients
achieved disease remission (CDAI<150 at 4 weeks)(p<0.001). Following four
additional infusions, given eight weeks apart, Avakine maintained the initial
treatment response and more Avakine-treated patients achieved remission.
 
  According to Company estimates, in the United States there are approximately
one million patients with severe rheumatoid arthritis. The Company also
believes that in the United States there are approximately 315,000 patients
with Crohn's disease in its moderate-to-severe form. Centocor intends to
continue studies for expanded indications of Crohn's disease. Studies are also
ongoing for Avakine in the treatment of rheumatoid arthritis.
 
  The Company intends to market and distribute Avakine in the United States
through its own direct sales force. The Company has entered into a
distribution agreement with Tanabe Seiyaku Co., Ltd. ("Tanabe") under
 
                                      11
<PAGE>
 
which Tanabe has commenced Phase II clinical testing and has the right to
distribute Avakine in Japan. Additionally, the Company is seeking to enter
into a distribution arrangement with a partner regarding Avakine for other
parts of the world.
 
  Panorex(R). (Edrecolomab) Panorex is a monoclonal antibody that targets
metastatic colon cancer cells. The Panorex antibody binds to colon cancer
cells and destroys them using various immunologic mechanisms including
complement and/or antibody dependent cellular cytotoxicity. Both mechanisms
result in the death of the cancer cells. In patients with colorectal cancer,
it is thought that small numbers of cells break away from the primary tumor
and spread to other sites such as bone marrow, where they can be detected as
"micrometastatic cells" even after surgical removal of the primary tumor. It
is thought that the Panorex antibody binds to these "micrometastatic cells"
and destroys them, leading to the prolonged survival observed in patients
treated with Panorex. Panorex is the first monoclonal antibody product
approved for cancer. In December 1994, the Paul Ehrlich Institute, the German
regulatory body for vaccines and antibodies, granted the Company marketing
authorization for the use of Panorex as an adjuvant therapy in the treatment
of post-operative colorectal cancer. During 1993, the Company and Glaxo
Wellcome entered into an alliance agreement for the development and marketing
of certain of the Company's monoclonal antibody-based cancer therapeutic
products, including Panorex. Pursuant to that agreement Glaxo Wellcome is the
worldwide distributor of Panorex. See "Business--Marketing and Sales." The
Company commenced commercial sales of Panorex in Germany in February 1995.
 
  In a Phase III trial conducted in Germany, Panorex showed a five-year 30%
mortality benefit and 27% reduction in tumor recurrences. Glaxo Wellcome is
conducting additional Phase III trials for Panorex, with a three-year survival
end-point, in North America, Europe and certain other countries, evaluating
patients with colorectal cancer, and also is conducting earlier stage trials
in Japan.
 
  Corsevin M. The Company is developing Corsevin M, an anti-factor VII
chimeric monoclonal antibody product intended to be used as an anticoagulant.
Factor VII is one of the primary factors that play a role in the blood
clotting process. The Company is evaluating protocols for additional clinical
trials.
 
  Gene Vaccines. The Company is developing genetic DNA-based products
employing commonly available methods to direct the injected DNA to its target
site. The Company has licensed GeneVax technology from a private company, in
which the Company holds a significant equity investment. Under that license,
the Company has certain rights to develop the GeneVax technology in the cancer
field. The Company has supplemented this technology license by acquiring
complementary technologies from other companies and institutions. The Company
expects to initially focus its development efforts on vaccines for prostate
and colorectal cancer. In 1997, the Company commenced Phase I clinical trials
to evaluate vaccines for colorectal cancer.
 
 Diagnostic Products
 
  Sales of the Company's diagnostics products were approximately $31,777,000
and $41,388,000 for the years ended December 31, 1997 and 1996, respectively.
 
  In-vitro diagnostic products are used to test patient blood samples outside
the body to detect or monitor disease. In this area, the Company has focused
principally on developing cancer diagnostic assays, and other in-vitro
diagnostic products for infectious disease. The reclassification by the FDA in
September 1996 of tumor markers used for monitoring patients with previously
diagnosed cancer may increase the likelihood and speed of approval for
products within this classification in the United States. A number of the
Company's diagnostic assays including CA 125 II, CA 15-3, CA 19-9, CA 72-4 and
CYFRA 21-1 fall under this tumor marker classification. The Company currently
manufactures and sells the following in-vitro diagnostic products:
 
  CA 125 II Ovarian Cancer Test. CA 125 II, a second generation assay which
aids in the detection of residual epithelial ovarian cancer following first-
line therapy, is sold in the United States, certain European countries and
Japan. CA 125 II is one of only six cancer diagnostics products approved for
sale in the United States.
 
                                      12
<PAGE>
 
  CA 19-9 Pancreatic Cancer Test. CA 19-9, which aids in the monitoring of
pancreatic cancer, is sold in certain European countries and Japan.
 
  CA 15-3 Breast Cancer Test. CA 15-3, which aids in the monitoring of breast
cancer, is sold in the United States, certain European countries and Japan.
 
  CA 72-4 Gastric Cancer Test. CA 72-4, which aids in the monitoring of
gastrointestinal cancer, is sold in certain European countries and Japan.
 
  P-glycoCHEK Multidrug Resistance Test. P-glycoCHEK, which detects a cellular
protein associated with resistance to chemotherapeutic drugs, is sold for
investigational use in certain European countries and Japan.
 
  CYFRA 21-1 Non-Small Cell Lung Cancer Test. CYFRA 21-1, which aids in the
monitoring of non-small cell lung cancer, is sold in certain European
countries and Japan.
 
  In June 1997, the Company sold a manufacturing facility in the United
Kingdom and its related infectious disease product line. Sales of this product
line were $886,000 and $3,253,000 for the six months ended June 30, 1997 and
the year ended December 31, 1996, respectively.
 
  P-selectin Profile. In connection with the development and marketing of
ReoPro, the Company has recognized the importance of platelet function in
cardiovascular disease. Based upon its knowledge in this area, the Company is
developing assays intended to enable interventional cardiologists to assess
rapidly platelet function and to perform better risk stratification of
patients with potentially serious cardiovascular disease. Additionally, the
Company is collaborating in the development of devices which, if developed,
may permit medical experts to monitor platelet activity and the effect of
drugs such as ReoPro with the same precision with which they currently
evaluate other aspects of blood coagulation and treatment. The Company
believes that the availability of this type of monitoring may address
currently unmet medical needs in the hospital emergency room, catheterization
lab and coronary care unit. There can be no assurance that the Company will be
able to complete the development of these programs or obtain the regulatory
approvals necessary for the commercial sale of products.
 
  The Company is currently developing a point-of-care ("POC") cardiovascular
diagnostic test, the P-selectin Profile, designed to allow emergency room
physicians to rapidly and accurately rule in for further treatment patients
suffering form Acute Coronary Syndrome ("ACS") and rule out for non-cardiac
treatment or early discharge patients not suffering ACS. The test is further
designed to determine whether patients suffering ACS are suffering a
myocardial infarction ("heart attack"), for whom immediate treatment is
critical to survival, or unstable angina ("UA"), for whom immediate or longer
term treatment is warranted. A heart attack is a condition where the heart
muscle is deprived of oxygen, usually due to the blockage of an artery,
resulting in irreversible heart muscle damage or potentially death. UA is
severe and constant pain and constriction about the heart caused by an
insufficient supply of blood to the heart. Current tests for a heart attack
include electrocardiograms ("ECG"), which initially fail to diagnose one-half
of heart attack cases, and cardiac enzymes, which begin to detect a heart
attack only after irreversible damage to the heart muscle has occurred. Based
on patient trials conducted to date, the Company believes that the P-selectin
Profile offers a unique opportunity to improve the quality of care for ACS
patients by complementing existing ECG and cardiac enzyme technologies and to
reduce the costs of unnecessary testing and admissions for patients not
suffering ACS.
 
MARKETING AND SALES
 
  In the therapeutic area, the Company maintains separate arrangements with
major pharmaceutical companies for each of its two commercialized products,
pursuant to which, in each case, the Company and its respective partner
jointly focus on the continued clinical and market development for the
product, while the Company's partner primarily conducts the marketing,
promotion and distribution of the product. The Company intends to market and
distribute Avakine in the United States through its own direct sales force and
intends to enter into a
 
                                      13
<PAGE>
 
distribution arrangement in Europe. In the diagnostics area, the Company
maintains distribution agreements with companies that have established
positions and distribution networks in relevant market segments. The Company
intends to market and distribute the P-selectin Profile directly in the United
States and to seek a distribution partner in other parts of the world. The
Company is highly dependent upon the ability of its marketing partners to
develop and expand markets for the Company's products.
 
  Pursuant to the agreements between Lilly and the Company, Lilly is the
exclusive worldwide distributor of ReoPro except in Japan, where the product,
if approved, will be exclusively distributed by Fujisawa. The Company sells
ReoPro to Lilly for Lilly's further sale to the end market. The Company is
principally responsible for developing and manufacturing ReoPro and for
securing regulatory approvals. Lilly is principally responsible for the
marketing, selling and distribution of ReoPro, except in Japan. The Company
plans to jointly promote ReoPro in the United States with Lilly. See "Recent
Developments."
 
  Pursuant to the Company's agreement with Fujisawa, consummated in August
1996, Fujisawa became the exclusive distributor of ReoPro in Japan. Following
approval of ReoPro for sale in Japan, if obtained, the Company will sell
ReoPro to Fujisawa for Fujisawa's further sale to the end market in Japan.
Fujisawa and the Company are co-developing ReoPro in Japan and will seek
jointly to secure regulatory approvals.
 
  Pursuant to the Company's agreement with Glaxo Wellcome, Glaxo Wellcome is
the exclusive worldwide distributor for Panorex. The Company sells Panorex to
Glaxo Wellcome for Glaxo Wellcome's further sale to the end market. Glaxo
Wellcome is responsible for the continuing clinical development, marketing,
sales and distribution of Panorex. The Company is principally responsible for
manufacturing Panorex, providing limited clinical support and securing
regulatory approvals.
 
  During 1997 and 1996, approximately 81% and 67%, respectively, of the
Company's total product sales were to one customer, Lilly. During 1995,
approximately 50% of the Company's total product sales were to three customers
as follows: 24% to Lilly, 11% to Glaxo Wellcome and 15% to Toray-Fuji Bionics,
Inc.
 
  Certain financial information by geographic area as well as major customer
information is set forth in Part II, Item 8. "Financial Statements and
Supplementary Data", Note 12--Geographic and Customer Information.
 
  The Company has no significant product backlog.
 
RESEARCH AND DEVELOPMENT
 
  Centocor's research and development activities focus primarily on monoclonal
antibody technology and proprietary techniques to modify monoclonal antibodies
in search of optimal therapeutic agents. Centocor believes that there is
significant potential for using monoclonal antibodies to develop human health
care products. While the specificity of monoclonal antibodies makes them
attractive candidates for therapeutic product development, antibody-based
products generally must be administered by injection, usually in a hospital
setting, and are therefore used principally to treat acute diseases. The
Company's ability to select effective hybridomas and to produce antibodies
from them is central to its business. An understanding of the structure and
function of antibodies is necessary in order to modify them for incorporation
into diagnostic or therapeutic products. The Company has developed techniques
for characterizing an antibody with respect to its structure, specificity and
binding ability which are used in an effort to select the best antibody for a
particular application.
 
  The Company carries out research efforts in the use of recombinant DNA
techniques to manipulate the genetic structure of antibody-producing cells.
These efforts are intended to create re-engineered antibodies that combine the
desired properties of more than one antibody, or the desired properties of
antibodies and other system-regulating biochemicals such as enzymes.
 
  The Company has also expanded its research platform to include the field of
DNA-based products for both therapeutic and diagnostic applications.
 
 
                                      14
<PAGE>
 
  For the three years ended December 31, 1997, 1996 and 1995, the Company's
research and development expenses were $68,623,000, $56,787,000 and
$66,235,000, respectively.
 
PATENTS AND LICENSING ARRANGEMENTS
 
  Products currently being marketed, developed or considered for development
by the Company are in the area of biotechnology, an area in which there are
extensive patent filings. The patent position of biotechnology 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 patents. Accordingly, there can be no assurance that patent
applications owned or licensed by the Company will result in patents being
issued or that, if issued, such patents will afford protection against
competitors with similar technology. In addition, there can be no assurance
that products covered by such patents, or any other products developed by the
Company or subject to licenses acquired by the Company, will not be covered by
third party patents, in which case continued development and marketing of such
products would require a license under such patents. There can be no assurance
that such required licenses will be available to the Company or its licensees
on acceptable terms.
 
  Other entities have filed applications for or have been issued patents and
are expected to obtain additional patents to which the Company may need to
acquire rights. The extent to which the Company may need to obtain rights to
any such patents or to contest their scope or validity will depend on final
product formulation and other factors. The ability to license any such patents
and the likelihood of successfully contesting the scope or validity of such
patents are uncertain and the costs associated therewith may be significant.
If the Company is required to acquire rights to valid and enforceable patents
but cannot do so at a reasonable cost, the Company's ability to manufacture or
market its products in the country of issuance of any such patent may be
materially adversely affected.
 
  There has been substantial litigation regarding patent and other
intellectual property rights in the biotechnology industry. Litigation may be
necessary to enforce certain intellectual property rights of the Company. Any
such litigation could result in substantial cost to and diversion of effort by
the Company.
 
  Centocor currently licenses the majority of the cell lines used to produce
its monoclonal antibodies from research institutions pursuant to long-term
licenses for which it is generally obligated to pay royalties based upon sales
of products incorporating such antibodies. There can be no assurance that
others will not acquire rights to such cell lines in the future.
 
GOVERNMENTAL REGULATION
 
  Regulation by governmental authorities in the United States and other
countries is a significant factor in the manufacture and marketing of the
Company's products and in ongoing research and product development activities.
All of the Company's therapeutic products and most of the Company's diagnostic
products will require regulatory approval by governmental agencies prior to
commercialization. In particular, human therapeutic products are subject to
rigorous preclinical and clinical testing and other premarket approval
requirements by the FDA and regulatory authorities in other countries. Various
statutes and regulations also govern or influence the manufacturing, safety,
labeling, storage, recordkeeping and marketing of such products. The lengthy
process of seeking these approvals, and the subsequent compliance with
applicable statutes and regulations, require the expenditure of substantial
resources. The Company believes it is currently in compliance with such
statutes and regulations. Any failure by the Company to obtain, or any delay
in obtaining, regulatory approvals could materially adversely affect the
Company and the Company's marketing partners' ability to market the Company's
products.
 
  The activities required before a pharmaceutical product may be marketed in
the United States begin with preclinical testing. Preclinical tests include
laboratory evaluation of product chemistry and animal studies to assess the
potential safety and efficacy of the product and its formulations. The results
of these studies must be submitted to the FDA as part of an Investigational
New Drug application, which must be reviewed by the FDA
 
                                      15
<PAGE>
 
before proposed clinical testing can begin. Typically, clinical testing
involves a three-phase process. In Phase I, clinical trials are conducted with
a small number of subjects to determine the early safety profile and the
pattern of drug distribution and metabolism. In Phase II, clinical trials are
conducted with groups of patients afflicted with a specified disease in order
to determine preliminary efficacy, optimal dosages and expanded evidence of
safety. In Phase III, large scale, multicenter, comparative clinical trials
are conducted with patients afflicted with a target disease in order to
provide enough data to evaluate statistically the efficacy and safety of the
product, as required by the FDA. The results of the preclinical and clinical
testing of a chemical pharmaceutical product are then submitted to the FDA in
the form of a New Drug Application ("NDA"), or for a biological pharmaceutical
product in the form of a Biological License Application ("BLA"), for approval
to commence commercial sales. In responding to an NDA or BLA, the FDA may
grant marketing approval, request additional information or deny the
application if it determines that the application does not satisfy its
regulatory approval criteria. There can be no assurance that any approval
required by the FDA will be obtained on a timely basis, if at all.
 
  Among the conditions for NDA or BLA approval is the requirement that the
prospective manufacturer's quality control and manufacturing procedures
conform on an ongoing basis with Good Manufacturing Practices ("GMP"). Before
approval of the BLA, the FDA will perform a prelicensing inspection of the
facility to determine its compliance with GMP and other rules and regulations.
In complying with GMP, manufacturers must continue to expend time, money and
effort in the area of production and quality control to ensure full
compliance. After the establishment is licensed for the manufacture of any
product, it is subject to periodic inspections by the FDA.
 
  The requirements such as those described above which the Company must
satisfy to obtain regulatory approval by governmental agencies in other
countries prior to commercialization of its products in such countries can be
rigorous, costly and uncertain.
 
  The Company is also subject to various laws and regulations relating to safe
working conditions, laboratory and manufacturing practices, the experimental
use of animals and the use and disposal of hazardous or potentially hazardous
substances, including radioactive compounds and infectious disease agents,
used in connection with the Company's research. The Company believes it is
currently in compliance with all such laws and regulations. The extent of
additional governmental regulation that might result from any legislative or
administrative action cannot be accurately predicted. Additionally, the
European Union is considering regulations which could lead to the ban of
products using certain raw materials. The Company's products currently utilize
these raw materials and such regulation, if enacted, could prevent the sale of
such products in Europe.
 
  The levels of revenues and profitability of biopharmaceutical companies may
be affected by the continuing efforts of government and third party payors to
contain or reduce the costs of health care through various means. For example,
in certain foreign markets, pricing or profitability of therapeutic and other
pharmaceutical products is subject to governmental control. In the United
States, there have been, and the Company expects that there will continue to
be, a number of federal and state proposals to implement similar governmental
control. While the Company cannot predict whether any such legislative or
regulatory proposals will be adopted, the adoption of such proposals could
have a material adverse effect on the Company. In addition, in both the United
States and elsewhere, sales of therapeutic and other pharmaceutical products
are dependent in part on the availability of reimbursement to the consumer
from third party payors, such as government and private insurance plans. Third
party payors are increasingly challenging the prices charged for medical
products and services. There can be no assurance that either of the
therapeutic products the Company has brought to market or any therapeutic
product candidates the Company may bring to market in the future will be
considered cost effective and that reimbursement to the consumer will be
available or will be sufficient to allow the Company to sell its products on a
competitive and profitable basis.
 
SIGNIFICANT COMPETITION AND TECHNOLOGICAL CHANGE
 
  Monoclonal antibody, genetic vaccine, peptide technology and other
innovations in biotechnology are being examined, evaluated and practiced in
biology research laboratories throughout the United States and in many
 
                                      16
<PAGE>
 
other countries, including laboratories of other biotechnology companies and
major pharmaceutical firms, many of which have greater resources than
Centocor.
 
  Several established pharmaceutical companies have internal research and
development groups, and alliances with other biotechnology companies, and are
seeking to develop monoclonal antibody-based, genetic vaccine-based, peptide-
based and other biological products. In addition, a number of companies have
recently entered the biological products field, some through acquisition or
merger, and more may be expected to do so in the future. As a result, Centocor
anticipates that new biological products will be developed by others.
 
  Centocor's management believes that its ability to compete in its targeted
markets will depend upon, among other things, its ability to develop or
acquire, produce and market innovative products. Centocor's management also
believes that significant competition will come from established
pharmaceutical companies that have greater capital resources, manufacturing
and marketing experience, research and development staffs, sales forces and
production facilities than Centocor. Such competition is expected to be in the
form of a variety of therapeutic products, which may include monoclonal
antibody-based, genetic vaccine-based and peptide-based products. There can be
no assurance that the activities of others will not render Centocor's products
or technologies obsolete or uncompetitive.
 
ITEM 2. PROPERTIES
 
  The Company owns four buildings in Malvern, Pennsylvania, and leases one
other building at this location. These buildings contain Centocor's corporate
offices, research and development laboratories, marketing offices, and certain
manufacturing facilities. Space is available in these buildings for future
expansion.
 
  The Company owns a biopharmaceutical manufacturing facility in Leiden, The
Netherlands, for the production of monoclonal antibody-based products using a
proprietary cell-culture system. This facility has been inspected and approved
by the FDA and the equivalent European regulatory agencies. The Company also
leases research and development laboratories and office space at this
location. The Company manufactures diagnostics products at its facilities in
Malvern, Pennsylvania. The Company's diagnostic manufacturing facility has
received ISO-9001 certification.
 
  Each of the Company's lease agreements with respect to its leased facilities
is a triple net lease with a remaining term of at least 4 years, under which
the Company is responsible for all operating expenses of the facility.
 
  The Company expects its total investment in property, plant and equipment to
increase in 1998 by up to approximately $100,000,000 to support its
manufacturing capacity expansion plans in Europe and the establishment of a
U.S. biopharmaceutical manufacturing facility in Malvern to support ReoPro and
Avakine production requirements.
 
ITEM 3. LEGAL PROCEEDINGS
 
  In October 1992, the Company was served with a complaint filed by the Velos
Group, a Maryland partnership ("Velos") in the U.S. District Court for the
District of Maryland. The complaint primarily alleged that the Company
breached certain provisions of a license agreement between Velos and the
Company pursuant to which the Company has exclusive rights to U.S. Patent No.
5,057,598, as well as various patent applications and foreign patents. The
complaint sought declaratory relief and monetary relief in excess of
$100,000,000, and requested that the Company place in escrow one-half of the
amounts received by the Company in 1992 pursuant to its agreements with Lilly.
Over the course of the litigation, plaintiff asserted eleven different claims
for relief and the Company asserted affirmative defenses and a counterclaim
against Velos with respect to the license agreement. After rulings on motions
for summary judgment filed by both sides, the majority of plaintiff's claims
were dismissed. The case proceeded to trial on February 18, 1997 on
plaintiff's four remaining claims under the license agreement and on the
Company's affirmative defenses and counterclaim. The parties agreed that
 
                                      17
<PAGE>
 
plaintiff's claim for attorneys fees under the license agreement would be
severed to await the outcome of the trial. On March 4, 1997, the jury returned
a verdict which, had it become the final judgment of the Court, would have
rendered the Company liable to pay plaintiff approximately $4,000,000 plus
interest and fees and expenses pursuant to the license agreement. The Company
then filed post-trial motions. On September 12, 1997, the Court entered
judgment as a matter of law in Centocor's favor, notwithstanding the verdict,
with respect to one of Velos' claims that would have resulted in liability of
$2,972,806, but the Court denied the motions relating to Centocor's
affirmative defenses. The amended judgment against Centocor was in the amount
of $1,352,689. In addition, Centocor would have remained liable for future
minimum annual royalty payments under the license agreement. Both Centocor and
Velos have appealed the judgment. Subsequent to the filing of notices of
appeal, and in the fourth quarter of 1997, the parties engaged in mediation at
the request of the Court of Appeals and discussed certain terms of a possible
settlement. Since December 31, 1997, the parties have been negotiating further
the terms of a possible settlement.
 
  In July 1995, PaineWebber Development Corporation, a wholly-owned subsidiary
of Paine Webber Group Inc., caused suits to be filed against the Company by
two research and development partnerships formed in the mid-1980s by
PaineWebber and managed by it since then. The two PaineWebber partnerships
(PaineWebber R&D Partners, L.P. and PaineWebber R&D Partners II, L.P.) were,
respectively, investors in Centocor Partners II, L.P. ("CPII") and Centocor
Partners III, L.P. ("CPIII"), research partnerships for which PaineWebber
acted as the sales agent and in other capacities. The Company purchased the
limited partners' interests in CPII in February 1992 and that partnership was
then dissolved. The Company purchased the Class A and Class C limited
partners' interests in CPIII in January 1997 and, purchased the Class B
limited partnership interest in CPIII in May 1997. See Note 7--Intangible and
other assets.
 
  The suit by PaineWebber R&D Partners, L.P., was filed in the Supreme Court
of the State of New York, County of New York, and was brought as a class
action on behalf of all former limited partners of CPII. The complaint charges
that some portion of the $100,000,000 paid by Lilly to the Company in July
1992 constituted revenues to the Company for the licensing, sublicensing or
sale of HA-1A (Centoxin) and that the Company is obligated to pay a percentage
thereof to the former limited partners of CPII, in addition to amounts already
paid. The Company moved to dismiss the New York suit on the ground that it was
brought in an inconvenient forum and that motion was granted. The suit was
then refiled in the Delaware Superior Court. Prior to the New York action, a
similar suit was filed by another former CPII partner, Jerome J. Petrisko, in
the Court of Common Pleas of Chester County, Pennsylvania. Petrisko was
subsequently allowed to intervene in the Delaware action and the Chester
County action was dismissed. The PaineWebber and Petrisko actions have been
consolidated and the action has been certified as a class action. The Company
has filed an affirmative defense and counterclaim based on unjust enrichment
which seek a setoff on any recovery by the class. Discovery has been
completed. In November 1997, Centocor filed a motion for summary judgment as
to certain claims asserted in plaintiffs' complaint. Argument on the motion
was held on December 29, 1997. The Court has not yet ruled on the motion. A
trial in this action is scheduled to commence on March 16, 1998. The Company
believes that these actions are without merit and intends to defend them
vigorously.
 
  The suit by PaineWebber R&D II, L.P. ("PWR&DII") was filed in the Court of
Chancery of the State of Delaware. In the complaint in this action, the
plaintiff seeks to sue derivatively on behalf of CPIII. CPIII is named as a
nominal defendant and the Company and Centocor Development Corporation III
("CDCIII"), a wholly owned subsidiary of the Company which acts as the general
partner of CPIII, are named as defendants against whom relief is sought. The
claim in this case is that at least $25,000,000 of the money paid by Lilly to
the Company in 1992 represented profits from the marketing of ReoPro,
obligating the Company to pay a portion thereof to CPIII, and that the Company
is obligated to pay an increased percentage of the profits from ReoPro to the
former CPIII limited partners going forward. The Company answered the
complaint in the Delaware action and filed a cross-claim against nominal
defendant CPIII and a third-party complaint against PaineWebber Group Inc. and
PaineWebber Development Corporation. The cross-claim seeks an offset against
any damages awarded the partners based on theories of unjust enrichment and
quasi contract. The third-party claims (later amended to add additional
theories of liability and to make PaineWebber, Inc. an additional third-party
defendant) seek to
 
                                      18
<PAGE>
 
hold the PaineWebber entities liable for some or all of any alleged injury to
the partnership. On November 1, 1995, an additional suit was commenced in the
Delaware Court of Chancery by John E. Abdo, a limited partner of CPIII,
against the Company, CDCIII and certain of their officers and directors. The
complaint, filed derivatively on behalf of CPIII, asserts claims, inter alia,
for breach of contract, breach of fiduciary duty, common law fraud, and
conspiracy and aiding and abetting. The Company answered this complaint and
also filed a cross-claim against nominal defendant CPIII and a third party
complaint against PaineWebber Group Inc. and PaineWebber Development
Corporation, later amended to add additional theories of liability and to name
PaineWebber, Inc. as a further third-party defendant. Abdo moved to amend his
complaint to assert claims against the persons appointed by PaineWebber to the
CDCIII Board of Directors. That motion was granted. Motions to disqualify
PWR&DII from serving as the derivative plaintiff were filed in July 1996 by
CPIII and in August 1996 by Centocor and CDCIII. Abdo joined those motions. No
decision has been issued on those motions. The case brought by PWR&DII has
been settled, subject to final approval of the settlement by the Court. Abdo
and Pharmaceutical Partners II, L.P., a limited partnership which has
purchased CPIII limited partnership interests, objected to the settlement.
They were permitted to take discovery regarding the settlement and have sought
to take additional discovery. A hearing on the adequacy and fairness of the
settlement was held on September 4, 1997. No decision has been rendered. See
Note 7--Intangible and Other Assets.
 
  On January 19, 1998, a purported class action captioned Surgener v.
Centocor, Inc. and David P. Holveck was filed in the United States District
Court for the Eastern District of Pennsylvania. Other similar suits were filed
thereafter. The complaints in these actions charge the Company and its chief
executive officer with having violated the federal securities laws. Plaintiffs
seek to represent a class of those who purchased Centocor stock between
December 2, 1997, and December 16, 1997, inclusive, and allege that defendants
made false and misleading statements in connection with earnings forecasts.
Damages in an unspecified amount are sought. The Company believes these
actions are without merit and intends to defend them vigorously.
 
  While it is not possible to predict with certainty the eventual outcome of
these matters, the Company believes that the foregoing proceedings will not
have a material adverse effect on the Company.
 
ITEM 4. SUBMISSION OF MATTERS TO A VOTE OF SECURITY HOLDERS
 
  No matters were submitted to a vote of security holders during the fiscal
year covered by this report.
 
                                      19
<PAGE>
 
                                    PART II
 
ITEM 5. MARKET FOR REGISTRANT'S COMMON STOCK AND RELATED STOCKHOLDER MATTERS
 
  The Company's Common Stock is traded publicly on the Nasdaq National Market
under the trading symbol CNTO. The table below sets forth the high and low
sale prices for the Company's Common Stock for the periods indicated as
reported by the Nasdaq National Market.
 
<TABLE>
<CAPTION>
                                                               HIGH    LOW
                                                               ----    ----
   <S>                                                         <C>     <C>
   Year ended December 31, 1996
     First Quarter.............................................$40     $27 5/8
     Second Quarter............................................ 40 7/8  28
     Third Quarter............................................. 37 7/8  23
     Fourth Quarter............................................ 37 3/8  25 1/2
   Year ended December 31, 1997
     First Quarter............................................. 41 1/4  27 1/2
     Second Quarter............................................ 38 1/4  23 3/8
     Third Quarter............................................. 51 1/4  29 3/4
     Fourth Quarter............................................ 53 3/4  27 1/4
</TABLE>
 
  On February 6, 1998, there were approximately 3,193 holders of record of the
Common Stock.
 
  In June 1996, the Company and Lilly amended their Sales and Distribution
Agreement. In July 1996, in consideration of the amendment and other
activities in connection with the commercialization and market development of
ReoPro, the Company issued 920,716 shares of its common stock in a private-
placement transaction under Section 4(2) of the Securities Act of 1933.
 
  The Company has never declared or paid any dividends on its Common Stock.
The Company does not anticipate paying any dividends in the foreseeable future
and intends to retain future earnings for the development and expansion of its
business.
 
                                      20
<PAGE>
 
ITEM 6. SELECTED FINANCIAL DATA
 
                      SUMMARY CONSOLIDATED FINANCIAL DATA
 
<TABLE>
<CAPTION>
                                       YEAR ENDED DECEMBER 31,
                           ---------------------------------------------------
                             1993       1994       1995      1996       1997
                           ---------  ---------  --------  ---------  --------
                                (IN THOUSANDS, EXCEPT PER SHARE DATA)
<S>                        <C>        <C>        <C>       <C>        <C>
CONSOLIDATED STATEMENT OF
 OPERATIONS DATA:
Revenues:
  Sales..................  $  48,071  $  39,984  $ 65,001  $ 132,130  $196,354
  Contracts:
    Related parties......     10,109      1,652       --         --        --
    Other................     17,750     25,590    13,915      3,355     4,430
                           ---------  ---------  --------  ---------  --------
  Total revenues.........     75,930     67,226    78,916    135,485   200,784
Costs and expenses(1)....    130,683    173,290   126,219    150,815   187,498
Other income
 (expenses)(2)...........    (19,626)   (20,594)   (9,829)     1,862    (2,156)
                           ---------  ---------  --------  ---------  --------
Income (loss) before
 extraordinary item......  $ (74,379) $(126,658) $(57,132) $ (13,468) $ 11,130
Net gain on
 extinguishment of debt..        --         --        --         705       --
                           ---------  ---------  --------  ---------  --------
Income (loss)............  $ (74,379) $(126,658) $(57,132) $ (12,763) $ 11,130
                           =========  =========  ========  =========  ========
Basic earnings (loss) per
 share...................  $   (1.79) $   (2.55) $  (0.98) $   (0.19) $   0.16
                           =========  =========  ========  =========  ========
Diluted earnings (loss)
 per share...............  $   (1.79) $   (2.55) $  (0.98) $   (0.19) $   0.16
                           =========  =========  ========  =========  ========
Weighted average number
 of shares outstanding...     41,482     49,597    58,207     66,475    69,809
Weighted average common
 and dilutive equivalent
 shares outstanding......     41,482     49,597    58,207     66,475    71,770
</TABLE>
 
<TABLE>
<CAPTION>
                                  1993      1994     1995      1996     1997
                                --------  -------- --------  -------- --------
<S>                             <C>       <C>      <C>       <C>      <C>
CONSOLIDATED BALANCE SHEET DA-
 TA:
Cash and investments(3)........ $140,028  $184,507 $137,206  $185,817 $206,630
Total assets...................  281,039   305,915  260,284   341,121  405,104
Long-term debt.................  238,100   231,640  231,640    54,765   54,765
Shareholders' equity
 (deficit).....................  (19,194)    5,278  (29,396)  235,910  257,835
</TABLE>
 
  No dividends have been declared or paid during any of the periods presented.
- --------
(1) Costs and expenses include the following: (a) charges for acquired
    research and development of $36,966 in 1994, (b) charge of $3,500 in 1993
    related to HA-1A inventory, (c) restructuring charges of $9,387 and $1,642
    in 1993 and 1995, respectively, (d) a royalty buyout of $17,098 in 1994
    and (e) a write-down of facilities and equipment of $7,870 in 1994.
(2) Other income (expenses) include: (a) a charge of $4,565 in 1997 relating
    to the loss on the sale of the Company's U.K. diagnostic manufacturing
    facility and related infectious disease product line and (b) charges of
    $1,275 and $3,750 in 1994 and 1995, respectively, related to the
    settlement of certain litigation.
(3) Cash and investments at December 31, 1997 include equity investments
    classified as available for sale of $11,957, and $7,260 of investments
    maintained at certain banks as collateral for certain debt outstanding at
    December 31, 1997. Cash and investments at December 31, 1996 include
    equity investments classified as available for sale of $9,502, and $7,260
    of investments maintained at certain banks as collateral for certain debt
    outstanding at December 31, 1996.
 
 
                                      21
<PAGE>
 
ITEM 7. MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND
RESULTS OF OPERATIONS
 
RETAVASE TRANSACTION
 
  On February 12, 1998, the Company announced that it has entered into the
Purchase Agreement to acquire the Retavase Assets from Roche Healthcare
Limited, an affiliate of Roche Holding Ltd., for $335,000,000 in cash. In
connection with the Acquisition, Centocor expects to record a one-time, pretax
charge of approximately $138,500,000, in the first quarter of 1998,
representing the acquisition of in-process research and development. Also
during the first quarter, the Company expects to record a one-time tax benefit
of approximately $20,000,000 from the recognition of certain deferred tax
assets. See "Recent Developments--Pending Acquisition of Retavase", and "Pro
Forma Condensed Consolidated Financial Data."
 
RESULTS OF OPERATIONS
 
 General
 
  The Company, since inception, has incurred significant operating expenses
developing therapeutic and diagnostic products. The Company has also incurred
significant special charges. Consequently, the Company had experienced
substantial operating losses. The Company's financial results progressively
improved throughout 1996 culminating with the Company achieving profitability
in the fourth quarter of 1996 and profitability in full year 1997. The Company
expects that its sales of therapeutic and diagnostic products in 1998 will
provide sufficient revenues to cover operating expenses and provide net income
for the year. The Company's results have been affected by various non-
operating events. Excluding such non-operating events, the Company reported
operating earnings per share of $.22 in 1997 versus an operating loss of $.20
per share in 1996.
 
  The Company commenced commercial sales of two therapeutic products in 1995:
ReoPro in January 1995 and Panorex in February 1995. In November 1997, the
Company obtained regulatory approvals in the United States and Europe for the
expanded use of ReoPro.
 
  In February 1997, the FASB issued Statement of Financial Standards No. 128,
Earnings Per Share ("Statement 128"), which was effective for financial
statements issued for periods ending after December 15, 1997, including
interim periods. This Statement establishes standards for computing and
presenting earnings per share ("EPS") and applies to entities with publicly
held common stock or potential common stock. This Statement simplifies the
standards for computing earnings per share previously found in Accounting
Principles Board Opinion No. 15, Earnings Per Share, and makes them comparable
to international EPS standards. It replaces the presentation of primary EPS
with a presentation of basic EPS. It also requires dual presentation of basic
and diluted EPS on the face of the income statement for all entities with
complex capital structures and requires a reconciliation of the numerator and
denominator for the basic EPS computation to the numerator and denominator of
the diluted EPS computation. This Statement requires restatement of all prior
period EPS data presented. The Company adopted Statement 128 in December of
1997. The adoption of Statement 128 did not have a significant effect on its
financial statements.
 
  In June 1997, the FASB issued Statement of Financial Standards No. 130,
Reporting Comprehensive Income ("Statement 130"). This Statement requires that
all items that are required to be recognized under accounting standards as
components of comprehensive income be reported in a financial statement that
is displayed with the same prominence as other financial statements. This
Statement is effective for fiscal years beginning after December 15, 1997. The
Company plans to adopt this accounting standard as required. The adoption of
this standard will have no impact on the Company's earnings, financial
condition or liquidity, but will require the Company to classify items of
other comprehensive income in a financial statement and display the
accumulated balance of other comprehensive income separately in the equity
section of the balance sheet.
 
  In June 1997, the FASB also issued Statement of Financial Standards No. 131,
Disclosures about Segments of an Enterprise and Related Information
("Statement 131"). Statement 131 supercedes Statement of Financial
 
                                      22
<PAGE>
 
Standards No. 14, Financial Reporting for Segments of a Business Enterprise,
and establishes new standards for reporting information about operation
segments in annual financial statements and requires selected information
about operating segments in interim financial reports. Statement 131 also
establishes standards for related disclosures about products and services,
geographic areas and major customers. Statement 131 is effective for periods
beginning after December 15, 1997. This Statement affects reporting in
financial statements only and will have no impact on the Company's results of
operations, financial condition or liquidity.
 
  The Company has accumulated certain tax attributes such as net operating
loss carryforwards and tax credit carryforwards which are assets in the sense
that they may provide the Company with future cash flows from the reduction in
future tax payments. However, the realization of such assets is not assured as
it depends upon future taxable income. Under Statement of Financial Accounting
Standard No. 109, the Company is required to recognize all or a portion of net
deferred tax assets with corresponding increases to net income, when the
Company believes, given the weight of all available evidence, that it is more
likely than not that all or a portion of the benefits of net operating loss
carryforwards and other credits will be realized.
 
  Centocor has approximately $301 million of deferred tax assets consisting
primarily of the future tax benefit from net operating loss carryforwards. The
Company presently has not concluded that it is more likely than not that it
will realize all, or a portion of the benefit of such tax assets. Accordingly,
the Company has recorded a 100% valuation allowance against the asset. If the
Company determines that all or a part of these deferred tax assets are more
likely than not to be realized through sufficient future profitability based
on the outcome of certain future events, then the Company will reverse all or
part of such valuation allowance and recognize a tax benefit. Until such tax
benefit is recognized, the Company's effective tax rate is reflective of the
utilization of its net operating loss carryforwards on an annual basis and
therefore such rate is expected to be substantially lower than the statutory
rate. Should all such deferred tax assets be recognized, the Company expects
that its effective tax rate in future periods will approximate the applicable
statutory rates.
 
  The recognition of these deferred tax assets under SFAS 109 has no impact on
the Company's cash flows for income taxes despite the change in the Company's
effective tax rate. The recognition of these deferred tax assets will impact
reported EPS due to the benefit recorded to the statement of operations from
the reduction in the Company's valuation allowance.
 
 Year ended December 31, 1997 compared to year ended December 31, 1996
 
  The increase in sales for the year ended December 31, 1997 as compared to
the year ended December 31, 1996 is principally due to the increase in sales
of ReoPro.
 
  The Company is highly dependent upon the ability of its marketing partners
to develop and expand the markets for both ReoPro and Panorex. For the year
ended December 31, 1997, ReoPro sales to Lilly were $158,373,000 and Lilly's
announced sales to end-users were $254,400,000. For the year ended December
31, 1996, ReoPro sales to Lilly were $88,669,000 and Lilly's announced sales
to end-users were $149,300,000. For the year ended December 31, 1997, the
Company's sales of Panorex to Glaxo Wellcome were $5,264,000 and Glaxo
Wellcome reported to the Company that sales to end-users were approximately
$5,653,000. For the year ended December 31, 1996, the Company's sales of
Panorex to Glaxo Wellcome were $2,073,000 and Glaxo Wellcome reported to the
Company that sales to end-users were approximately $5,375,000. The level of
the Company's sales of ReoPro to Lilly and of Panorex to Glaxo Wellcome is
dependent upon the orders placed and the levels of inventory maintained by
each of these marketing partners. The Company expects ReoPro end sales to
increase in 1998 as market acceptance continues to grow. Therefore, the
Company expects its sales of ReoPro to Lilly to increase in 1998 over 1997
levels. Panorex sales to Glaxo Wellcome in 1998 are not expected to have a
significant impact on the Company's financial results.
 
  Diagnostic product sales for the year ended December 31, 1997 were
$31,777,000 as compared to $41,388,000 for the year ended December 31, 1996.
In June of 1997, the Company completed the sale of its U.K. diagnostic
manufacturing facility and its related infectious disease product line.
Oncology diagnostic
 
                                      23
<PAGE>
 
product sales for the year ended December 31, 1997 were $30,097,000 as
compared to $37,689,000 for the year ended December 31, 1996. This decrease
was due primarily to a reduction in the selling prices of some of the
Company's diagnostic bulk products, a reduction in component sales, lower
completed kit volumes and, to a lesser extent, the unfavorable impact of
foreign currency fluctuations. Diagnostic product sales in 1998 are expected
to be at about the same level achieved in 1997 primarily due to lower sales
prices and a shift of mix of products sold to more bulk and component products
for which the Company receives lower sales revenues.
 
  The level of future sales of both diagnostic and therapeutic products will
be dependent upon several factors, including, but not limited to, the timing
and extent of future regulatory approvals of the Company's products, the
availability of production capacity, as well as the continued availability of
necessary raw materials and intermediate inputs into the production process,
approval and commercialization of competitive products and ultimately, the
degree of acceptance of the Company's products in the marketplace. For the
Company's diagnostic products, the level of sales is also dependent upon the
extent of and timing of bulk and component sales to marketing partners
developing new automated instruments, as well as the mix of completed
diagnostic kit sales. The Company is currently attempting to expand its
diagnostic distribution channels to include additional distributors on a non-
exclusive basis and the Company further expects that current distributors of
its completed kits may increase sales of their respective diagnostic kits
incorporating the Company's bulk antibodies or components, which the Company
expects will result in reduced revenues on certain diagnostic products. The
Company's revenues from sales of bulk antibodies and components to partners
are lower than revenues from sales of its completed diagnostic kits.
 
  The Company is also evaluating a number of business strategies to expand and
support both its therapeutic and diagnostic products and product candidates
including, but not limited to, access to instruments primarily in the
diagnostics area, directly participating in the promotion and marketing of
certain of the Company's products and product candidates and expanding the
Company's production capabilities. In order to implement such strategies, the
Company may need to secure financing from the equity or other capital markets
or through bank relationships. There can be no assurance that such financing
will be available or that these business strategies, or any others, if
implemented will be successful in achieving increased product sales for the
Company's therapeutic and diagnostic products and product candidates.
 
  Cost of sales increased for the year ended December 31, 1997 as compared to
the year ended December 31, 1996 due primarily to the increased sales of
ReoPro. The Company is required to make certain royalty payments, based on
sales of products, which payments represent a significant percentage of cost
of sales. The Company expects an increase in cost of sales in 1998, the extent
of which will depend primarily on the amount and mix of products sold. The
Company's gross margin on sales for the year ended December 31, 1997 was
approximately 60% as compared to approximately 54% for the year ended December
31, 1996. Gross margin percentage in 1998 is expected to improve over 1997 as
production activities increase and further process efficiencies are realized.
Factors that can influence gross margin include, but are not limited to,
exchange rate fluctuations, unplanned production losses, cell line yields,
increases in royalty obligations, costs of raw materials and production
interruptions due to plant upgrades.
 
  Research and development expenses for the year ended December 31, 1997
increased as compared to the year ended December 31, 1996 due principally to
increased clinical trial activities to expand the indications for ReoPro and
the continued development of Avakine. The level of the Company's total
research and development expenses in future periods will be dependent upon the
extent of clinical trial-related activities. Research and development expenses
are expected to increase in 1998 as compared to 1997 due to clinical trial
activities in connection with the continued expansion of ReoPro use for
additional indications including, but not limited to, acute myocardial
infarction and in stroke. In addition, clinical trial activities for Avakine,
primarily phase III trials for the Crohn's and severe rheumatoid arthritis
indications are expected to continue into 1998.
 
  Marketing, general and administrative expenses for the year ended December
31, 1997 increased as compared to the year ended December 31, 1996 due
principally to ReoPro and Avakine market development efforts. The levels of
the Company's marketing, general and administrative expenses are expected to
increase in
 
                                      24
<PAGE>
 
future periods as compared to 1997 levels as the Company expands its market
development activities in connection with sales of therapeutic and diagnostic
products and directly undertakes the promotion, marketing and sale of any of
its therapeutic or diagnostic products. Marketing, general and administrative
expenses are expected to increase in 1998 as compared to 1997 due primarily to
the Company's increased investment in the direct promotion and sale of
Avakine.
 
  Interest income decreased for the year ended December 31, 1997 as compared
to the year ended December 31, 1996 due principally to a decrease in the
interest rates obtained on the Company's cash and investment balances.
Interest income in future periods will depend primarily on the level of the
Company's investments and the rates of return obtained on such investments.
 
  Interest expense decreased for the year ended December 31, 1997 as compared
to the year ended December 31, 1996 due principally to the conversion of the
Company's 7 1/4% Convertible Notes due February 1, 2001 into the Company's
Common Stock, the purchase of $70,235,000 of the Company's 6 3/4% Convertible
Debentures and the repayment of mortgage loans in Europe. Interest expense in
future periods will depend upon the level of debt outstanding.
 
  Other expenses increased for the year ended December 31, 1997 as compared to
the year ended December 31, 1996 due to an increase in Centocor's equity in
the losses of a company in which Centocor has invested. Centocor does not
expect the future equity in the income or losses of this investee company to
have a material impact on the Company.
 
  The Company did not record a provision for income tax for the year ended
December 31, 1997 or December 31, 1996. Although the Company reported net
income in 1997 for book purposes, after accounting for temporary and permanent
differences between reported net income and taxable income, Centocor did not
achieve taxable income in 1997. Therefore, no tax provision was recorded in
the financial statements.
 
 Year ended December 31, 1996 compared to year ended December 31, 1995
 
  The increase in sales for the year ended December 31, 1996 as compared to
the year ended December 31, 1995 is principally due to the increase in sales
of ReoPro. ReoPro sales commenced in January 1995.
 
  For the year ended December 31, 1996, ReoPro sales to Lilly were $88,669,000
and Lilly's announced sales to end-users were $149,300,000. For the year ended
December 31, 1995 sales to Lilly were $15,545,000 and Lilly's announced sales
to end-users were $22,800,000. For the year ended December 31, 1996, the
Company's sales of Panorex to Glaxo Wellcome were $2,073,000 and Glaxo
Wellcome reported to the Company that sales to end-users were approximately
$5,375,000. For the year ended December 31, 1995 sales to Glaxo Wellcome were
$6,531,000 and Glaxo Wellcome reported to the Company that sales to end-users
were approximately $3,400,000. The level of the Company's sales of ReoPro to
Lilly and of Panorex to Glaxo Wellcome is dependent upon the orders placed and
the levels of inventory maintained by each of these marketing partners, which
in 1995 included initial launch period quantities.
 
  Diagnostic product sales for the year ended December 31, 1996 were
$41,388,000 as compared to $42,859,000 for the same period in 1995. This
decrease was due primarily to a one-time $2,176,000 1995 stocking order of
reagents to a new customer and the reduction in the percentage of end-user
sales that the Company received from the sale of reagents in 1996 due to a
change in certain exclusive arrangements to non-exclusive in an effort to
allow the Company to increase its market penetration.
 
  The decrease in contract revenues for the year ended December 31, 1996 as
compared to the year ended December 31, 1995 was primarily due to the
achievement of certain milestones in 1995 pursuant to the Company's agreements
with Lilly. Contract revenues for the year ended December 31, 1995 included
$10,000,000 recognized pursuant to the Company's agreements with Lilly as a
result of the Company's achievement of milestones in the development of
ReoPro.
 
 
                                      25
<PAGE>
 
  Cost of sales increased for the year ended December 31, 1996 as compared to
the year ended December 31, 1995 due primarily to the increased sales of
ReoPro. The Company is required to make certain royalty payments, based on
sales of products, which payments represent a significant percentage of cost
of sales. The Company's gross margin on sales for the year ended December 31,
1996 was approximately 54% as compared to approximately 55% for the year ended
December 31, 1995. Factors that can influence gross margin include, but are
not limited to, exchange rate fluctuations, unplanned production losses, cell
line yields, increases in royalty obligations, costs of raw materials and
production interruptions due to plant upgrades.
 
  Research and development expenses for the year ended December 31, 1996
decreased as compared to the year ended December 31, 1995 due principally to
the capitalization as inventory in 1996 of certain costs associated with the
manufacture of ReoPro. In 1995, such costs were not associated with the
production of inventory and therefore were expensed as research and
development expenses.
 
  Marketing, general and administrative expenses for the year ended December
31, 1996 increased as compared to the year ended December 31, 1995 due
principally to ReoPro market development efforts and ongoing litigation.
 
  Interest income increased for the year ended December 31, 1996 as compared
to the year ended December 31, 1995 due principally to an increase in the
Company's average cash and investment balances.
 
  Interest expense decreased for the year ended December 31, 1996 as compared
to the year ended December 31, 1995 due principally to the conversion of the
Company's 7 1/4% Convertible Notes due February 1, 2001 into the Company's
Common Stock, the purchase of $70,235,000 of the Company's 6 3/4% Convertible
Debentures and the repayment of mortgage loans in Europe.
 
  Other income (expenses) increased for the year ended December 31, 1996 as
compared to the year ended December 31, 1995 due to an increase in Centocor's
equity in the losses of a company in which Centocor has invested.
 
  Other income (expenses) also includes a charge to operations of $3,750,000
for the year ended December 31, 1995 relating to the settlement of certain
class action securities litigation. The results of operations for the year
ended December 31, 1995 also included a charge to costs and expenses of
$1,642,000 for severance costs related to a reduction in the level of the
Company's personnel in 1995.
 
                                      26
<PAGE>
 
QUARTERLY RESULTS
 
  The following table sets forth certain unaudited consolidated statement of
operations data for the three years ended December 31, 1997 (in thousands
except per share data):
 
<TABLE>
<CAPTION>
                                                    QUARTER ENDED
                                        ---------------------------------------
                                        MARCH 31, JUNE 30,  SEPT. 30,  DEC. 31,
                                          1995      1995      1995       1995
                                        --------- --------  ---------  --------
<S>                                     <C>       <C>       <C>        <C>
Total revenues.........................  $23,995  $ 20,754  $ 19,155   $ 15,012
Cost and expenses:
  Cost of sales........................    8,625     8,071     7,271      5,199
  Research and development.............   13,501    17,008    18,376     17,350
  Marketing, general and
   administrative......................    7,494     7,120     7,643      6,919
  Special charges......................      --        --        --       1,642
                                         -------  --------  --------   --------
Total costs and expenses...............   29,620    32,199    33,290     31,110
Other income (expenses)................   (2,617)   (5,864)    1,980     (3,328)
                                         -------  --------  --------   --------
Net loss...............................  $(8,242) $(17,309) $(12,155)  $(19,426)
                                         =======  ========  ========   ========
</TABLE>
 
<TABLE>
<CAPTION>
                                         MARCH 31,  JUNE 30  SEPT. 30,  DEC. 31,
                                           1996       1996     1996       1996
                                         ---------  -------- ---------  --------
<S>                                      <C>        <C>       <C>        <C>
Total revenues.......................... $ 21,882 $ 30,586  $ 39,179   $ 43,838
Cost and expenses:                                
  Cost of sales.........................   10,554   14,554    17,652     18,334
  Research and development..............   12,548   13,296    15,174     15,769
  Marketing, general and                          
   administrative.......................    7,403    7,882     8,537      9,112
                                         -------- --------  --------   --------
Total costs and expenses................   30,505   35,732    41,363     43,215
Net gain on extinguishment of debt......      --       705       --         --
Other income (expenses).................   (1,075)     118       549      2,270
                                         -------- --------  --------   --------
Net income (loss)....................... $ (9,698)$ (4,323) $ (1,635)  $  2,893
                                         ======== ========  ========   ========
</TABLE>
 
<TABLE>
<CAPTION>
                                          MARCH 31, JUNE 30,  SEPT. 30, DEC. 31,
                                            1997      1997      1997      1997
                                          --------- --------  --------- --------
<S>                                       <C>       <C>       <C>       <C>
Total revenues...........................  $45,036  $53,643    $51,401  $50,704
Cost and expenses:
  Cost of sales..........................   17,806   22,183     18,307   19,662
  Research and development...............   14,337   17,292     18,821   18,173
  Marketing, general and administrative..    9,796    9,588     10,310   11,223
                                           -------  -------    -------  -------
Total costs and expenses.................   41,939   49,063     47,438   49,058
Other income (expenses)..................      244   (3,840)       678      762
Provision for income taxes...............       70       20        200     (290)
                                           -------  -------    -------  -------
Net income...............................  $ 3,271  $   720    $ 4,441  $ 2,698
                                           =======  =======    =======  =======
</TABLE>
 
  The Company's results, as a percentage of total revenues, have fluctuated on
a quarterly basis and can be expected to continue to be subject to quarterly
fluctuations. Quarterly results can fluctuate as a result of a number of
factors, including the timing of research and development expenses, the level
of product sales, the completion or commencement of significant contracts, a
reduction in the valuation allowance relating to the Company's deferred tax
assets and foreign exchange fluctuations.
 
                                      27
<PAGE>
 
PER SHARE CALCULATIONS
 
  At December 31, 1997, approximately 3,971,115 shares of the Company's Common
Stock were issuable upon exercise of outstanding options and warrants and upon
vesting of restricted stock awards. The Company uses the weighted average
number of shares outstanding in calculating basic per share data. When
dilutive, options and warrants are included as share equivalents using the
treasury stock method and are included in the calculation of diluted per share
data. The approximately 898,000 shares issuable upon conversion of the 6 3/4%
Convertible Debentures are not considered Common Stock equivalents and are not
included in the calculation of basic or diluted per share data but would be
included in the calculation of diluted per share data if their effect is
dilutive.
 
  No Common Stock equivalents or shares issuable upon conversion of the 6 3/4%
Convertible Debentures were included in the per share calculations for any
year presented since to do so would have been antidilutive. In March 1996, the
Company completed a public offering of 4,025,000 shares. In April 1996, the
Company issued 3,450,000 shares as a result of the conversion of the Company's
7 1/4% Convertible Notes. In July 1996, the Company issued 920,716 shares in
connection with its agreements with Lilly. These shares have been included in
the per share calculations and, depending upon the market value of the
Company's Common Stock and its results of operations for such periods, the
Company may be required to include its then outstanding Common Stock
equivalents as well as shares issuable upon the conversion of the 6 3/4%
Convertible Debentures in its calculations of per share data for such periods
if the effect would be dilutive.
 
LIQUIDITY AND CAPITAL RESOURCES
 
  The Company, since inception, has incurred significant operating expenses
attempting to develop therapeutic and diagnostic products. The Company has
also incurred significant special charges. Consequently, the Company had
experienced substantial net cash outflows, which have been only partially
offset by significant contract revenues received through collaborative
alliances with pharmaceutical companies and the Company's financing
activities. The Company's financial results have progressively improved
throughout 1996 culminating with the Company achieving profitability in the
fourth quarter of 1996 and for the full year 1997.
 
  The Company's total cash, cash equivalents and investments increased by
$20,813,000 from December 31, 1996, principally as a result of cash received
from operations and the exercise of options as discussed below, partially
offset by investments in fixed assets. The Company's future financial
condition is dependent upon the Company's rate of net cash inflows and,
ultimately, upon the achievement of significant and sustained levels of
therapeutic product sales. Under the Company's strategy of entering into
collaborative alliances with established pharmaceutical companies, the Company
generally shares sales revenues from products covered by such arrangements
with its partners. The level of future sales of both diagnostic and
therapeutic products will be dependent upon several factors, including, but
not limited to, the timing and extent of future regulatory approvals of the
Company's products, approval and commercialization of competitive products and
the degree of acceptance of the Company's products in the marketplace. There
can be no assurance that FDA or other regulatory approvals expanding the
authorized use of ReoPro and other products or permitting the commercial sale
of any of the Company's product candidates under development will be obtained.
Failure to obtain additional timely FDA or other regulatory approvals for the
use of ReoPro or other product candidates, including Avakine, will have a
material adverse effect on the Company.
 
  At December 31, 1997, the Company had cash, cash equivalents and investments
of $206,630,000, including equity investments of $11,957,000. For the year
ended December 31, 1997, the Company had cash flows from operations of
$33,715,000. The Company's total cash flows for the year ended December 31,
1997 included the receipt of $8,996,000 from the exercise of options to
purchase shares of the Company's Common Stock. The extent and timing of future
option exercises, if any, are primarily dependent upon the market price of the
Company's Common Stock and general financial market conditions, as well as the
exercise prices and expiration dates of the options. In the first quarter of
1996, the Company completed a public equity offering of 4,025,000 shares of
common stock. The net proceeds to the Company from the offering were
$125,916,000.
 
                                      28
<PAGE>
 
Upon completion of the offering, the Company initiated redemption of the
remaining 7 1/4% Convertible Notes due February 2001 most of which were
converted into common stock in the second quarter of 1996. Also in the second
quarter of 1996, the Company purchased $70,235,000 of the 6 3/4% Convertible
Debentures. In the third quarter of 1996, the Company received $15,000,000 in
connection with its agreements with Fujisawa. Additionally, in the fourth
quarter 1996, the Company repaid both its mortgage debt and long-term note
related to its Leiden facility in the amount of $15,141,000. At December 31,
1997, $54,765,000 of the 6 3/4% Convertible Debentures remain outstanding. At
December 31, 1997, the Company has a note payable of $5,940,000 which is
secured by investments at the lending bank of $7,260,000. The Company believes
that its cash, cash equivalents and investments will be sufficient to fund its
operations through at least the end of 1998.
 
  Inventory at December 31, 1997 increased as compared to December 31, 1996
due primarily to increased production of ReoPro.
 
  Gross property, plant and equipment at December 31, 1997 increased compared
to December 31, 1996, principally due to the investment of $23,570,000 for the
purchase of property and equipment partially offset by the impact of exchange
rates on property and equipment denominated in foreign currencies and the sale
of the Company's U.K. manufacturing facility and related infectious disease
product line in the second quarter of 1997. The Company expects its total
investments in property, plant and equipment to increase in 1998 by an amount
up to approximately $100,000,000 for its manufacturing capacity expansion
plans in Europe and the establishment of a U.S. biopharmaceutical
manufacturing facility in Malvern to support ReoPro and Avakine production
requirements.
 
  Long-term investments at December 31, 1997 increased as compared to December
31, 1996 principally due to an increase in the carrying value of an investment
classified as available for sale. In 1996 the Company acquired an investment,
ChromaVision Medical Systems Inc., as compensation for its prior research and
commercialization efforts and the exchange of a commercialization license. The
Company's historical basis in this investment was $770,000 and was valued at
$8,665,000 at December 31,1997. Unrealized gains and losses on securities
classified as available for sale are carried as a separate component of
shareholders' equity.
 
  Intangible and other assets at December 31, 1997 increased as compared to
December 31, 1996 resulting primarily from the advance payment of
approximately $13,600,000 to the former limited partners of CPIII in January
1997 in connection with the exercise of the Company's option to purchase the
limited partnership interest in CPIII. In June 1997, the Company announced
that it reached an agreement to settle the litigation brought by PaineWebber
R&D Partners II, L.P. on behalf of CPIII, against Centocor arising out of
Centocor's sales and distribution agreement with Lilly with respect to ReoPro.
The settlement is conditional on Delaware Chancery Court approval. The
agreement provides, among other things, for Centocor to pay the former CPIII
limited partners $10,800,000 from which attorney's fees and expenses will be
deducted, an additional $5,000,000, if and when cumulative world-wide sales of
ReoPro exceed $600 million and a revision to the royalties payable to the
former CPIII limited partners. The Company expects to pay $15,800,000 in 1998.
The Company has recorded these probable payments to the former CPIII limited
partners as a prepaid royalty, a component of Intangible and other assets in
the second quarter of 1997.
 
  The Company has entered into indemnity agreements with the former limited
partners of CCIP, CPII and CPIII pursuant to which the Company would be
obligated, under certain circumstances, to compensate these parties for the
fair market value of their respective interests under any license agreements
with the Company relating to their respective products which are lost through
the exercise by the U.S. government of any of its rights relating to the
licensed technology. The amount of any such loss would be determined annually
by independent appraisal.
 
  In October 1997, the Company announced that its subsidiary, Centocor
Diagnostics, had filed a registration statement with the Securities and
Exchange Commission relating to a proposed initial public offering by Centocor
Diagnostics of shares of its Class A Common Stock. The Company will not sell
any shares of Centocor Diagnostics stock in the offering. The proceeds of the
offering were to be used for capital expenditures related
 
                                      29
<PAGE>
 
principally to Centocor Diagnostics' cardiovascular diagnostic program,
working capital, product research and development, and other general corporate
purposes. In December 1997, the Company announced that the initial public
offering of Centocor Diagnostics, Inc. has been postponed due to market
conditions.
 
LEGAL PROCEEDINGS
 
  The Company is subject to certain litigation, as more fully described under
Part I, Item 3 "Legal Proceedings." While it is not possible to predict with
certainty the eventual outcome of these matters, the Company believes that
such legal proceedings will not have a material adverse effect on the Company.
 
ROYALTIES
 
  The Company is required to make certain future payments to the former
limited partners of CCIP and CPII based on sales of products developed by each
of the respective partnerships. Pursuant to the exercise by the Company of its
option to acquire the limited partnership interests in CPIII in January 1997,
the Company is required to make future payments to the former limited partners
of CPIII which will include payments based on future sales of ReoPro.
 
  The Company has entered into agreements to support research at certain
research institutions. These agreements, which grant the Company licenses
and/or options to license certain technology resulting from the research,
generally require the Company to pay royalties to such institutions on the
sales of any products that utilize the licensed technology. Further, the
Company has licenses under certain patents, patent applications and technology
and pays the licensors or their licensees royalties under such agreements.
 
  The Company has entered into indemnity agreements with the former limited
partners of CCIP, CPII and CPIII pursuant to which the Company would be
obligated, under certain circumstances, to compensate these parties for the
fair market value of their respective interests under any license agreements
with the Company relating to their respective products which are lost through
the exercise by the U.S. government of any of its rights relating to the
licensed technology. The amount of any such loss would be determined annually
by independent appraisal.
 
  All royalties are reflected in cost of sales as incurred. Royalty costs
represent a significant percentage of sales.
 
PRODUCT LIABILITY AND PRODUCT RECALL
 
  The testing and marketing of medical products entails an inherent risk of
product liability. There is also a risk that circumstances might develop
requiring a product recall. The Company maintains limited product liability
insurance coverage. Centocor's business may be materially adversely affected
by a successful product liability claim in excess of any insurance coverage.
There can be no assurance that product liability insurance coverage will
continue to be available to Centocor in the future on reasonable terms or at
all.
 
FOREIGN CURRENCY
 
  Certain of the Company's sales are denominated in currencies other than the
U.S. dollar. Additionally, the Company conducts operations in countries other
than the United States, primarily its manufacturing facility in Leiden, The
Netherlands. The Company's consolidated financial statements are denominated
in U.S. dollars, and, accordingly, changes in the exchange rate between
foreign currencies and the U.S. dollar will affect the translation of
financial results of foreign subsidiaries into U.S. dollars for purposes of
reporting the Company's consolidated financial results. To date, exchange rate
fluctuations have not had a material net effect on the Company's financial
results. The Company does not currently engage in any derivatives transactions
as a hedge against foreign currency fluctuations.
 
 
                                      30
<PAGE>
 
YEAR 2000 ISSUES
 
  The Company is aware of the issues associated with the programming code in
many existing computer systems as the millennium approaches. The "Year 2000"
problem is pervasive; virtually every computer operation may be affected in
some way by the rollover of the two digit year value to 00. The risk is that
computer systems will not properly recognize date sensitive information when
the year changes to 2000. Systems that do not properly recognize such
information could generate erroneous date or cause a system to fail, resulting
in business interruption.
 
  The Year 2000 issue is expected to affect the systems of various entities
with which the Company interacts, including the Company's marketing partners,
suppliers, and various vendors, and the Company is coordinating its efforts to
address the Year 2000 issue with those entities. However, there can be no
assurances that the systems of other companies on which the Company's systems
rely will be timely converted, or that a failure to convert by another
company, or a conversation that is incompatible with the Company's systems,
would not have material adverse effect on the Company.
 
  With respect to its own computer systems, the Company is upgrading,
generally, in order to meet the demands of its expanding business. In the
process the Company is taking steps to identify, correct or reprogram and test
its existing systems for Year 2000 compliance. It is anticipated that all new
system upgrades or reprogramming efforts will be completed by mid 1999,
allowing adequate time for testing. The Company presently believes that with
modification to existing software and conversations to new software, the Year
2000 issue can be mitigated. However, given the complexity of the Year 2000
issue, there can be no assurances that the Company will be able to address the
problem without costs and uncertainties that might affect future financial
results or cause reported financial information not to be necessarily
indicative of future operating results or future financial condition.
 
  Since the Company currently plans to upgrade the majority of its systems
regardless of the Year 2000 problem, management has not separately assessed
the Year 2000 compliance expense and related potential effect on the Company's
earnings.
 
  The mid-1999 date by which the Company plans to complete its upgrades and
Year 2000 modifications is management's best estimate, which was derived
utilizing numerous assumptions of future events including the continued
availability of certain resources, third party modification plans and other
factors. However, there can be no assurances that this estimate will be
achieved and actual results could differ materially from those plans. Specific
factors that might cause such material differences include, but are not
limited to, the availability and cost of personnel trained in this area, the
ability to locate and correct all relevant computer codes, and similar
uncertainties.
 
INFLATION
 
  The Company believes the effects of inflation generally do not have a
material adverse impact on its operations or financial condition.
 
                                      31
<PAGE>
 
ITEM 8. FINANCIAL STATEMENTS AND SUPPLEMENTARY DATA
 
                        CENTOCOR, INC. AND SUBSIDIARIES
                          CONSOLIDATED BALANCE SHEETS
 
<TABLE>
<CAPTION>
                                                               DECEMBER 31,
                                                             ------------------
                                                               1997      1996
                                                             --------  --------
                                                              (IN THOUSANDS)
<S>                                                          <C>       <C>
                           ASSETS
CURRENT ASSETS:
  Cash and cash equivalents (Notes 5 and 9)................. $ 85,565  $ 55,953
  Short-term investments (Notes 5 and 9)....................  109,108   120,362
  Accounts and contracts receivable.........................   26,459    27,440
  Interest receivable.......................................    1,394     2,147
  Inventory (Note 6)........................................   27,777    23,815
  Prepaid expenses..........................................    3,053     4,279
  Other current assets......................................    1,489       752
                                                             --------  --------
                                                              254,845   234,748
PROPERTY, PLANT AND EQUIPMENT (NOTE 9):
  Land......................................................    6,044     6,176
  Buildings.................................................   62,913    65,431
  Equipment, furniture, fixtures and improvements...........   62,869    68,403
  Construction in progress..................................   24,614     1,481
                                                             --------  --------
                                                              156,440   141,491
  Less accumulated depreciation.............................  (79,426)  (79,954)
                                                             --------  --------
                                                               77,014    61,537
LONG-TERM INVESTMENTS (NOTE 5)..............................   11,957     9,502
INTANGIBLE AND OTHER ASSETS (NOTE 7)........................   61,288    35,334
                                                             --------  --------
    Total assets............................................ $405,104  $341,121
                                                             ========  ========
</TABLE>
 
 
          See accompanying Notes to Consolidated Financial Statements.
 
                                       32
<PAGE>
 
                        CENTOCOR, INC. AND SUBSIDIARIES
                     CONSOLIDATED BALANCE SHEETS (CONT'D.)
 
<TABLE>
<CAPTION>
                                                    DECEMBER 31,
                                                ----------------------
                                                   1997        1996
                                                ----------  ----------
                                                   (IN THOUSANDS)
<S>                                             <C>         <C>
LIABILITIES AND SHAREHOLDERS' 
            EQUITY            
CURRENT LIABILITIES:          
  Accounts payable...........................   $   15,651  $    9,543
  Accrued expenses (Note 8)..................       54,203      28,940
  Unearned revenues..........................          --          100
  Notes payable (Note 9).....................        5,940       6,897
  Other current liabilities   
   (Note 10).................................       15,800         --
                                                ----------  ----------
                                                    91,594      45,480
LONG-TERM DEBT (NOTE 9)......................       54,765      54,765
OTHER LIABILITIES............................          910       1,127
MINORITY INTEREST............................          --        3,839
SHAREHOLDERS' EQUITY (NOTES 2, 5 AND 11):                
  Preferred Stock, $.01 par value, 
   10,000 shares authorized, none issued.....          --          --
  Common Stock, $.01 par value, 100,000 
   shares authorized and 70,146 and  
   69,177 issued and outstanding at 
    December 31, 1997 and 1996,         
   respectively...............................         701         692
  Additional paid-in          
   capital....................................   1,060,158   1,050,062
  Deficit.....................................    (810,472)   (821,602)
  Unrealized gain on          
   marketable securities......................       7,894       2,342
  Cumulative foreign currency 
   translation adjustments....................        (446)      4,416
                                                ----------  ----------
                                                   257,835     235,910
                                                ----------  ----------
    Total liabilities and     
     shareholders' equity.....................  $  405,104  $  341,121
                                                ==========  ==========
</TABLE>
 
 
          See accompanying Notes to Consolidated Financial Statements.
 
                                       33
<PAGE>
 
                        CENTOCOR, INC. AND SUBSIDIARIES
                     CONSOLIDATED STATEMENTS OF OPERATIONS
 
<TABLE>
<CAPTION>
                                           FOR THE YEARS ENDED DECEMBER 31,
                                           ----------------------------------
                                              1997        1996        1995
                                           ----------  ----------  ----------
                                            (IN THOUSANDS EXCEPT PER SHARE
                                                        DATA)
<S>                                        <C>         <C>         <C>
REVENUES:
  Sales................................... $  196,354  $  132,130  $   65,001
  Contracts...............................      4,430       3,355      13,915
                                           ----------  ----------  ----------
                                              200,784     135,485      78,916
COSTS AND EXPENSES:
  Cost of sales...........................     77,958      61,094      29,166
  Research and development................     68,623      56,787      66,235
  Marketing, general and administrative...     40,917      32,934      29,176
  Other charges (Note 14).................        --          --        1,642
                                           ----------  ----------  ----------
                                              187,498     150,815     126,219
OTHER INCOME (EXPENSES):
  Interest income.........................      9,607      10,276      10,126
  Interest expense........................     (3,938)     (8,351)    (17,001)
  Loss on sale of facility and related
   business (Note 14).....................     (4,565)        --          --
  Litigation settlement (Note 14).........        --          --       (3,750)
  Other...................................     (3,260)        (63)        796
                                           ----------  ----------  ----------
                                               (2,156)      1,862      (9,829)
                                           ----------  ----------  ----------
INCOME (LOSS) BEFORE EXTRAORDINARY ITEM... $   11,130  $  (13,468) $  (57,132)
                                           ----------  ----------  ----------
EXTRAORDINARY ITEM:
  Net gain on extinguishment of debt (Note
   9).....................................        --          705         --
                                           ----------  ----------  ----------
NET INCOME (LOSS)......................... $   11,130  $  (12,763) $  (57,132)
                                           ==========  ==========  ==========
BASIC EARNINGS (LOSS) PER SHARE:
  Before extraordinary item............... $     0.16  $    (0.20) $    (0.98)
  Extraordinary item...................... $      --   $     0.01  $      --
                                           ----------  ----------  ----------
  Net income (loss) per share............. $     0.16  $    (0.19) $    (0.98)
                                           ==========  ==========  ==========
DILUTED EARNINGS (LOSS) PER SHARE:
  Before extraordinary item............... $     0.16  $    (0.20) $    (0.98)
  Extraordinary item...................... $      --   $     0.01  $      --
                                           ----------  ----------  ----------
  Net income (loss) per share............. $     0.16  $    (0.19) $    (0.98)
                                           ==========  ==========  ==========
WEIGHTED AVERAGE NUMBER OF SHARES
 OUTSTANDING..............................     69,809      66,475      58,207
                                           ==========  ==========  ==========
WEIGHTED AVERAGE COMMON AND DILUTIVE
 EQUIVALENT SHARES OUTSTANDING............     71,770      66,475      58,207
                                           ==========  ==========  ==========
</TABLE>
 
          See accompanying Notes to Consolidated Financial Statements.
 
                                       34
<PAGE>
 
                        CENTOCOR, INC. AND SUBSIDIARIES
                     CONSOLIDATED STATEMENTS OF CASH FLOWS
 
<TABLE>
<CAPTION>
                                                   YEAR ENDED DECEMBER 31,
                                                 ------------------------------
                                                   1997      1996       1995
                                                 --------  ---------  ---------
                                                        (IN THOUSANDS)
<S>                                              <C>       <C>        <C>
Cash flows from (used for) operating activi-
 ties:
 Net income (loss).............................  $ 11,130  $ (12,763) $ (57,132)
 Adjustments to reconcile net income (loss) to
  net cash from (used for) operating
  activities:
  Loss on sale of facility and related
   business....................................     4,565        --         --
  Net gain on extinguishment of debt...........       --        (705)       --
  Provisions for depreciation and
   amortization................................    14,617     14,004     16,394
  Amortization of deferred income..............      (100)       (83)    (1,616)
  Share of loss in equity investee.............     3,664        919        204
  Changes in assets and liabilities:
    Accounts and contracts receivable..........    (1,136)   (16,044)       378
    Interest receivable........................       745       (512)      (542)
    Inventory..................................    (4,561)    (4,096)    (4,519)
    Prepaid expenses...........................    (2,621)    (4,409)    (3,568)
    Other current assets.......................      (825)      (110)       462
    Intangible and other assets................   (19,345)      (127)    (1,456)
    Accounts payable...........................       450      5,537     (2,425)
    Unearned revenue...........................       --         --          46
    Accrued expenses and other liabilities.....    27,349      5,706     (2,941)
    Other long-term liabilities................      (217)      (155)       164
                                                 --------  ---------  ---------
  Net cash from (used for) operating
   activities..................................    33,715    (12,838)   (56,551)
Cash flows used for investing activities:
 Purchases of investments......................   (97,649)  (115,577)  (147,381)
 Sales of investments..........................   106,065    110,650    136,490
 Sale of facility and related business.........     2,835        --         --
 Purchases of fixed assets.....................   (23,570)    (4,674)    (4,845)
                                                 --------  ---------  ---------
  Net cash used for investing activities.......   (12,319)    (9,601)   (15,736)
Cash flows from financing activities:
 Net proceeds from issuance of Common Stock
  relating to public offering..................       --     125,916        --
 Net proceeds from other issuances of Common
  Stock........................................     8,996     20,791     18,557
 Reduction of long-term debt and notes pay-
  able.........................................       --     (84,537)    (9,615)
                                                 --------  ---------  ---------
  Net cash from financing activities...........     8,996     62,170      8,942
Effect of foreign currency translation.........      (780)       220        422
                                                 --------  ---------  ---------
Net increase (decrease) in cash and cash equiv-
 alents........................................    29,612     39,951    (62,923)
Beginning cash and cash equivalents............    55,953     16,002     78,925
                                                 --------  ---------  ---------
Ending cash and cash equivalents...............  $ 85,565  $  55,953  $  16,002
                                                 ========  =========  =========
</TABLE>
 
          See accompanying Notes to Consolidated Financial Statements.
 
                                       35
<PAGE>
 
                        CENTOCOR, INC. AND SUBSIDIARIES
                CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY
<TABLE>
<CAPTION>
                            COMMON STOCK
                         -------------------
                                                                        NET UNREALIZED    CUMULATIVE
                                                                           GAIN ON     FOREIGN CURRENCY
                         NUMBER OF             ADDITIONAL                 MARKETABLE     TRANSLATION
                          SHARES   PAR VALUE PAID IN CAPITAL  DEFICIT     SECURITIES     ADJUSTMENTS
                         --------- --------- --------------- ---------  -------------- ----------------
                                                        (IN THOUSANDS)
<S>                      <C>       <C>       <C>             <C>        <C>            <C>
BALANCE AT DECEMBER 31,
 1994...................  57,081     $571      $  750,175    $(751,707)     $  --           $6,239
Issued upon exercise of
 options and warrants...   1,388       14          18,323          --          --              --
Issued to employee
 benefit plan...........      31      --              511          --          --              --
Vested pursuant to
 restricted stock award
 plan...................      38      --            1,059          --          --              --
Translation
 adjustments............     --       --              --           --          --              209
Carrying value
 adjustments............     --       --              --           --        2,342             --
Net loss................     --       --              --       (57,132)        --              --
                          ------     ----      ----------    ---------      ------          ------
BALANCE AT DECEMBER 31,
 1995...................  58,538      585         770,068     (808,839)      2,342           6,448
Issued upon exercise of
 options and warrants...   1,596       16          18,015          --          --              --
Issued to employee
 benefit plan...........      71        1             379          --          --              --
Issued upon stock
 offering...............   4,025       40         125,916          --          --              --
Issued upon conversion
 of debt................   3,831       38         106,302          --          --              --
Amendment to Sales and
 Distribution Agreement
 with Lilly.............     921        9          26,991          --          --              --
Vested pursuant to
 restricted stock award
 plan...................      60        1             760          --          --              --
Warrants retired
 pursuant to Tocor II
 exchange offer.........     135        2           1,631          --          --              --
Translation
 adjustments............     --       --              --           --          --           (2,032)
Net loss................     --       --              --       (12,763)        --              --
                          ------     ----      ----------    ---------      ------          ------
BALANCE AT DECEMBER 31,
 1996...................  69,177      692       1,050,062     (821,602)      2,342           4,416
Issued upon exercise of
 options and warrants...     876        9           8,989          --          --              --
Issued to employee
 benefit plan...........       9      --              320          --          --              --
Vested pursuant to
 restricted stock award
 plan...................      84      --              787          --          --              --
Translation
 adjustments............     --       --              --           --          --           (4,862)
Carrying value
 adjustments............     --       --              --           --        5,552             --
Net income..............     --       --              --        11,130         --              --
                          ------     ----      ----------    ---------      ------          ------
BALANCE AT DECEMBER 31,
 1997...................  70,146     $701      $1,060,158    $(810,472)     $7,894          $ (446)
                          ======     ====      ==========    =========      ======          ======
</TABLE>
 
 
 
          See accompanying Notes to Consolidated Financial Statements.
 
                                       36
<PAGE>
 
                                CENTOCOR, INC.
 
                  NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
 
NOTE 1
 
DESCRIPTION OF BUSINESS
 
  Centocor, Inc. ("Centocor" or the "Company") is a biopharmaceutical company
the mission of which is to develop or otherwise acquire and commercialize
novel therapeutic and disgnostic products and services that solve critical
needs in human healthcare, with a primary technological focus on monoclonal
antibodies and DNA-based products.
 
NOTE 2
 
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
 
 Basis of Presentation
 
  The consolidated financial statements include the accounts of the Company
and its wholly-owned subsidiaries. All significant intercompany balances and
transactions have been eliminated in consolidation.
 
 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.
 
 Investments
 
  The Company classifies investments with original maturities of three months
or less as cash equivalents. Investments with maturities of one year or less
are classified as short-term.
 
  Short-term marketable securities are carried at cost, which approximates
market value. Long-term debt securities which the Company has the ability and
intent to hold until maturity are carried at amortized cost. The equity
investments classified as available for sale are carried at estimated fair
value with unrealized gains and losses recorded as a component of
shareholders' equity. The Company also classifies certain investments as
trading securities which are carried at fair value with the unrealized gains
and losses reported in earnings.
 
 Inventory
 
  Inventory is stated at the lower of cost or market value using the first-in,
first-out method for diagnostic and pharmaceutical product inventories.
 
  Inventories have various expiration dates. Reserves are provided for
inventories which are likely to expire prior to sale or are likely to
otherwise not be available for sale.
 
 Property, plant and equipment and depreciation
 
  Property, plant and equipment are stated at cost. Depreciation is provided
using the straight-line method over the estimated useful lives of the assets,
the depreciable lives are as follows:
 
<TABLE>
    <S>                                                               <C>
    Equipment, furniture and fixtures................................  3-5 years
    Land improvements................................................   10 years
    Leasehold improvements...........................................   10 years
    Building and building improvements............................... 31.5 years
</TABLE>
 
                                      37
<PAGE>
 
                                CENTOCOR, INC.
 
            NOTES TO CONSOLIDATED FINANCIAL STATEMENTS--(CONTINUED)
 
 
  Leasehold improvements are amortized over the applicable lease period or
their estimated useful lives, whichever is shorter. Maintenance and repairs
are charged to expense, and major renewals and improvements are capitalized.
 
 Intangible and Other Assets
 
  Intangible and other assets are stated at cost, net of accumulated
amortization. Amortization is provided using either the straight-line method
or more applicable methods over the estimated useful lives of the assets,
generally 3 to 20 years. Intangable and other assets are reviewed for
impairment whenever events or circumstances provide evidence that suggest that
the carrying amount of the asset may not be recoverable. Impairment is
evaluated by using identified or expected cash flows.
 
 Revenue Recognition
 
  For contracts under which the Company is reimbursed for expenses, revenue is
recognized as the related expenses are incurred. Non-refundable fees or
milestone payments in connection with research and development or
commercialization agreements are recognized when they are earned in accordance
with the applicable performance requirements and contractual terms. Payments
received which are related to future performance are deferred and recognized
as revenue over the specified future performance periods.
 
  Sales revenues are recognized at the time the goods are shipped or when
title to the goods passes to the buyer. For certain bulk reagents, sales
revenues are recognized upon confirmation from the Company's customers that
product has been shipped to the final end user.
 
 Income Taxes
 
  The Company accounts for income taxes in accordance with Statement of
Financial Accounting Standards No. 109 "Accounting for Income Taxes." The
Company has net operating loss carryforwards for tax purposes that begin to
expire in 2005. Since realization of the tax benefit associated with these
carryforwards is not assured, a valuation allowance was recorded against this
tax benefit. In addition, pursuant to the Tax Reform Act of 1986, the annual
utilization of these losses may be limited. The Company believes that any such
limitation will not have a material impact on the utilization of these
carryforwards.
 
 Per Share Data
 
  The Company uses the weighted average number of shares outstanding in
calculating basic per share data. When dilutive, options and warrants are
included as share equivalents using the treasury stock method and are included
in the calculation of diluted per share data. Common Stock issuable upon
conversion of convertible debt securities are included in the calculation of
diluted per share data if their effect is dilutive.
 
 Foreign Currency Translation
 
  Assets and liabilities of subsidiaries denominated in foreign currencies are
translated at rates in effect at the appropriate year-end. Revenues and
expenses of such subsidiaries are translated at average rates of exchange for
the period of operation. The differences resulting from such translation as
compared to the equity of such subsidiaries translated at historical rates are
included in cumulative foreign currency translation adjustments, a separate
component of shareholders' equity. The Company believes that the aggregate
foreign currency transaction gains/losses do not have a significant effect on
its financial statements.
 
                                      38
<PAGE>
 
                                CENTOCOR, INC.
 
            NOTES TO CONSOLIDATED FINANCIAL STATEMENTS--(CONTINUED)
 
 
 Fair Value of Financial Instruments
 
  The FASB issued Statement of Financial Accounting Standards No.107,
Disclosures About Fair Value of Financial Instruments, which defines the fair
value of a financial instrument as the amount at which the instrument could be
exchanged in a current transaction between willing parties. Cash and cash
equivalents, short term investments, accounts and contracts receivable,
prepaid expenses, interest receivable, other current assets, accounts payable
and accrued expenses reported in the consolidated balance sheets equal or
approximate fair value due to their short maturities. See Note 9 for
information regarding the fair value of the Company's long-term debt and notes
payable.
 
NOTE 3
 
COMMITMENTS AND CONTINGENCIES
 
 Liquidity and Capital Resources
 
  The Company, since inception, has incurred significant operating expenses
attempting to develop therapeutic and diagnostic products. The Company has
also incurred significant special charges. Consequently, the Company had
experienced substantial net cash outflows, which have been only partially
offset by significant contract revenues received through collaborative
alliances with pharmaceutical companies and the Company's financing
activities. The Company's financial results have progressively improved
throughout 1996 culminating with the Company achieving profitability in the
fourth quarter of 1996 and for the full year 1997.
 
  The Company's total cash, cash equivalents and investments increased by
$20,813,000 from December 31, 1996, principally as a result of cash received
from operations and the exercise of options as discussed below, partially
offset by investments in fixed assets. The Company's future financial
condition is dependent upon the Company's rate of net cash inflows and,
ultimately, upon the achievement of significant and sustained levels of
therapeutic product sales. Under the Company's strategy of entering into
collaborative alliances with established pharmaceutical companies, the Company
generally shares sales revenues from products covered by such arrangements
with its partners. The level of future sales of both diagnostic and
therapeutic products will be dependent upon several factors, including, but
not limited to, the timing and extent of future regulatory approvals of the
Company's products, approval and commercialization of competitive products and
the degree of acceptance of the Company's products in the marketplace. There
can be no assurance that FDA or other regulatory approvals expanding the
authorized use of ReoPro and other products or permitting the commercial sale
of any of the Company's product candidates under development will be obtained.
Failure to obtain additional timely FDA or other regulatory approvals for the
use of ReoPro or other product candidates, including Avakine, will have a
material adverse effect on the Company.
 
 Legal Proceedings
 
  In October 1992, the Company was served with a complaint filed by the Velos
Group, a Maryland partnership ("Velos") in the U.S. District Court for the
District of Maryland. The complaint primarily alleged that the Company
breached certain provisions of a license agreement between Velos and the
Company pursuant to which the Company has exclusive rights to U.S. Patent No.
5,057,598, as well as various patent applications and foreign patents. The
complaint sought declaratory relief and monetary relief in excess of
$100,000,000, and requested that the Company place in escrow one-half of the
amounts received by the Company in 1992 pursuant to its agreements with Lilly.
Over the course of the litigation, plaintiff asserted eleven different claims
for relief and the Company asserted affirmative defenses and a counterclaim
against Velos with respect to the license agreement. After rulings on motions
for summary judgment filed by both sides, the majority of plaintiff's claims
were dismissed. The case proceeded to trial on February 18, 1997 on
plaintiff's four remaining claims under the
 
                                      39
<PAGE>
 
                                CENTOCOR, INC.
 
            NOTES TO CONSOLIDATED FINANCIAL STATEMENTS--(CONTINUED)
 
license agreement and on the Company's affirmative defenses and counterclaim.
The parties agreed that plaintiff's claim for attorneys fees under the license
agreement would be severed to await the outcome of the trial. On March 4,
1997, the jury returned a verdict which, had it become the final judgment of
the Court, would have rendered the Company liable to pay plaintiff
approximately $4,000,000 plus interest and fees and expenses pursuant to the
license agreement. The Company then filed post-trial motions. On September 12,
1997, the Court entered judgment as a matter of law in Centocor's favor,
notwithstanding the verdict, with respect to one of Velos' claims that would
have resulted in liability of $2,972,806, but the Court denied the motions
relating to Centocor's affirmative defenses. The amended judgment against
Centocor was in the amount of $1,352,689. In addition, Centocor would have
remained liable for future minimum annual royalty payments under the license
agreement. Both Centocor and Velos have appealed the judgment. Subsequent to
the filing of notices of appeal, and in the fourth quarter of 1997, the
parties engaged in mediation at the request of the Court of Appeals and
discussed certain terms of a possible settlement. Since December 31, 1997, the
parties have been negotiating further the terms of a possible settlement.
 
  In July 1995, PaineWebber Development Corporation, a wholly-owned subsidiary
of Paine Webber Group Inc., caused suits to be filed against the Company by
two research and development partnerships formed in the mid-1980s by
PaineWebber and managed by it since then. The two PaineWebber partnerships
(PaineWebber R&D Partners, L.P. and PaineWebber R&D Partners II, L.P.) were,
respectively, investors in Centocor Partners II, L.P. ("CPII") and Centocor
Partners III, L.P. ("CPIII"), research partnerships for which PaineWebber
acted as the sales agent and in other capacities. The Company purchased the
limited partners' interests in CPII in February 1992 and that partnership was
then dissolved. The Company purchased the Class A and Class C limited
partners' interests in CPIII in January 1997 and, purchased the Class B
limited partnership interest in CPIII in May 1997. See Note 7--Intangible and
other assets.
 
  The suit by PaineWebber R&D Partners, L.P., was filed in the Supreme Court
of the State of New York, County of New York, and was brought as a class
action on behalf of all former limited partners of CPII. The complaint charges
that some portion of the $100,000,000 paid by Lilly to the Company in July
1992 constituted revenues to the Company for the licensing, sublicensing or
sale of HA-1A (Centoxin) and that the Company is obligated to pay a percentage
thereof to the former limited partners of CPII, in addition to amounts already
paid. The Company moved to dismiss the New York suit on the ground that it was
brought in an inconvenient forum and that motion was granted. The suit was
then refiled in the Delaware Superior Court. Prior to the New York action, a
similar suit was filed by another former CPII partner, Jerome J. Petrisko, in
the Court of Common Pleas of Chester County, Pennsylvania. Petrisko was
subsequently allowed to intervene in the Delaware action and the Chester
County action was dismissed. The PaineWebber and Petrisko actions have been
consolidated and the action has been certified as a class action. The Company
has filed an affirmative defense and counterclaim based on unjust enrichment
which seek a setoff on any recovery by the class. Discovery has been
completed. In November 1997, Centocor filed a motion for summary judgment as
to certain claims asserted in plaintiffs' complaint. Argument on the motion
was held on December 29, 1997. The Court has not yet ruled on the motion. A
trial in this action is scheduled to commence on March 16, 1998. The Company
believes that the these actions are without merit and intends to defend them
vigorously.
 
  The suit by PaineWebber R&D II, L.P. ("PWR&DII") was filed in the Court of
Chancery of the State of Delaware. In the complaint in this action, the
plaintiff seeks to sue derivatively on behalf of CPIII. CPIII is named as a
nominal defendant and the Company and Centocor Development Corporation III
("CDCIII"), a wholly owned subsidiary of the Company which acts as the general
partner of CPIII, are named as defendants against whom relief is sought. The
claim in this case is that at least $25,000,000 of the money paid by Lilly to
the Company in 1992 represented profits from the marketing of ReoPro,
obligating the Company to pay a portion thereof to CPIII, and that the Company
is obligated to pay an increased percentage of the profits from ReoPro to the
former CPIII limited partners going forward. The Company answered the
complaint in the Delaware action
 
                                      40
<PAGE>
 
                                CENTOCOR, INC.
 
            NOTES TO CONSOLIDATED FINANCIAL STATEMENTS--(CONTINUED)
 
and filed a cross-claim against nominal defendant CPIII and a third-party
complaint against PaineWebber Group Inc. and PaineWebber Development
Corporation. The cross-claim seeks an offset against any damages awarded the
partners based on theories of unjust enrichment and quasi contract. The third-
party claims (later amended to add additional theories of liability and to
make PaineWebber, Inc. an additional third-party defendant) seek to hold the
PaineWebber entities liable for some or all of any alleged injury to the
partnership. On November 1, 1995, an additional suit was commenced in the
Delaware Court of Chancery by John E. Abdo, a limited partner of CPIII,
against the Company, CDCIII and certain of their officers and directors. The
complaint, filed derivatively on behalf of CPIII, asserts claims, inter alia,
for breach of contract, breach of fiduciary duty, common law fraud, and
conspiracy and aiding and abetting. The Company answered this complaint and
also filed a cross-claim against nominal defendant CPIII and a third party
complaint against PaineWebber Group Inc. and PaineWebber Development
Corporation, later amended to add additional theories of liability and to name
PaineWebber, Inc. as a further third-party defendant. Abdo moved to amend his
complaint to assert claims against the persons appointed by PaineWebber to the
CDCIII Board of Directors. That motion was granted. Motions to disqualify
PWR&DII from serving as the derivative plaintiff were filed in July 1996 by
CPIII and in August 1996 by Centocor and CDCIII. Abdo joined those motions. No
decision has been issued on those motions. The case brought by PWR&DII has
been settled, subject to final approval of the settlement by the Court. Abdo
and Pharmaceutical Partners II, L.P., a limited partnership which has
purchased CPIII limited partnership interests, objected to the settlement.
They were permitted to take discovery regarding the settlement and have sought
to take additional discovery. A hearing on the adequacy and fairness of the
settlement was held on September 4, 1997. No decision has been rendered. See
Note 7--Intangible and Other Assets.
 
  On January 19, 1998, a purported class action captioned Surgener v.
Centocor, Inc. and David P. Holveck was filed in the United States District
Court for the Eastern District of Pennsylvania. Other similar suits were filed
thereafter. The complaints in these actions charge the Company and its chief
executive officer with having violated the federal securities laws. Plaintiffs
seek to represent a class of those who purchased Centocor stock between
December 2, 1997, and December 16, 1997, inclusive, and allege that defendants
made false and misleading statements in connection with earnings forecasts.
Damages in an unspecified amount are sought. The Company believes these
actions are without merit and intends to defend them vigorously.
 
  While it is not possible to predict with certainty the eventual outcome of
these matters, the Company believes that the foregoing proceedings will not
have a material adverse effect on the Company.
 
 Royalties
 
  In January 1997, the Company exercised its option to acquire the limited
partnership interests in CPIII and made an advance payment of approximately
$13,598,000 in cash to the Class A and Class C limited partners of CPIII. The
Company recorded this payment as a prepaid royalty in January 1997. In
addition, the Company is required to make future royalty payments to the
former limited partners of CPIII based upon future sales of ReoPro.
 
  The Company has entered into agreements to support research at certain
research institutions. These agreements, which grant the Company licenses
and/or options to license certain technology resulting from the research,
generally require the Company to pay royalties to such institutions on the
sales of any products that utilize the licensed technology. Further, the
Company has licenses under certain patents, patent applications and technology
and pays the licensors or their licensees royalties under such agreements.
 
  The Company has entered into agreements to support research at certain
research institutions. These agreements, which grant the Company licenses
and/or options to license certain technology resulting from the research,
generally require the Company to pay royalties to such institutions on the
sales of any products that utilize the licensed technology. Further, the
Company has licenses under certain patents, patent applications and technology
and pays the licensors or their licensees royalties under such agreements
 
                                      41
<PAGE>
 
                                CENTOCOR, INC.
 
            NOTES TO CONSOLIDATED FINANCIAL STATEMENTS--(CONTINUED)
 
 
  The Company has entered into indemnity agreements with the former limited
partners of CCIP, CPII and CPIII pursuant to which the Company would be
obligated, under certain circumstances, to compensate these parties for the
fair market value of their respective interests under any license agreements
with the Company relating to their respective products which are lost through
the exercise by the U.S. government of any of its rights relating to the
licensed technology. The amount of any such loss would be determined annually
by independent appraisal.
 
  All royalties are reflected in cost of sales as incurred. Royalty costs
represent a significant percentage of sales.
 
 Product Liability and Product Recall
 
  The testing and marketing of medical products entails an inherent risk of
product liability. There is also a risk that circumstances might develop
requiring a product recall. The Company maintains limited product liability
insurance coverage. Centocor's business may be materially adversely affected
by a successful product liability claim in excess of any insurance coverage.
There can be no assurance that product liability insurance coverage will
continue to be available to Centocor in the future on reasonable terms or at
all.
 
NOTE 4
 
COLLABORATIVE ARRANGEMENTS
 
 Relationship with Eli Lilly and Company
 
  In July 1992, Centocor and Lilly entered into a Sales and Distribution
Agreement later amended in June 1993. Under that Agreement, as amended in June
1993, Centocor is principally responsible for developing and manufacturing
ReoPro, and Lilly will assist Centocor in the regulatory filings and continued
development of ReoPro for various clinical indications. Also, in the event
Centocor cannot manufacture ReoPro or under certain other circumstances, such
as material breach of the agreement by or the bankruptcy of Centocor, Lilly
has the option to assume the manufacture of ReoPro and assure the continued
supply of the product, even to the extent of acquiring Centocor's related
manufacturing assets at their independently appraised values.
 
  In June 1996, the Company and Lilly amended the Sales and Distribution
Agreement. Under the amendment, Lilly no longer has the right to buy ReoPro
for resale in Japan; however, Lilly will maintain its exclusive right to buy
and resell ReoPro in the rest of the world. In July 1996, in consideration of
the amendment and other activities in connection with the commercialization
and market development of ReoPro, the Company issued 920,716 shares of its
Common Stock to Lilly.
 
 Relationship with Fujisawa Pharmaceutical Co., Ltd.
 
  In August 1996, Centocor entered into an agreement with Fujisawa
Pharmaceutical Co., Ltd., appointing Fujisawa as the exclusive distributor of
ReoPro in Japan. As compensation for its appointment as exclusive distributor
in Japan, Fujisawa made a nonrefundable $15,000,000 payment to the Company,
and may make future milestone payments.
 
  The Company and Fujisawa will co-develop ReoPro in Japan and jointly file
for Japanese product approval. Fujisawa shall bear all external costs
associated with the clinical development of ReoPro in Japan.
 
                                      42
<PAGE>
 
                                CENTOCOR, INC.
 
            NOTES TO CONSOLIDATED FINANCIAL STATEMENTS--(CONTINUED)
 
 
 Relationship with Glaxo Wellcome plc
 
  In November 1993, Centocor and Glaxo Wellcome entered into an alliance
agreement for the development and marketing of certain of Centocor's
monoclonal antibody-based cancer therapeutic products, including Panorex. In
November 1994, Centocor and Glaxo Wellcome amended their alliance agreement
and Glaxo Wellcome became the exclusive worldwide distributor for Panorex.
Under the agreement, Glaxo Wellcome is responsible principally for the
continuing clinical development of Panorex, and Centocor is responsible
principally for manufacturing Panorex and securing regulatory approvals.
 
NOTE 5
 
CASH EQUIVALENTS AND INVESTMENTS
 
  Management determines the appropriate classification of its investments in
debt and equity securities at the time of purchase and reevaluates such
determination at each balance sheet date. Securities that the Company has both
the intent and ability to hold to maturity are carried at amortized cost.
Securities that the Company does not intend to hold to maturity are classified
either as "available for sale" or as "trading" and are carried at fair value.
Unrealized gains and losses on securities classified as available for sale are
reported as a separate component of shareholders' equity. Unrealized gains and
losses on specific securities classified as trading are reported in earnings.
 
  At December 31, 1997, securities classified as trading, available for sale
and held to maturity are summarized below (in thousands).
 
<TABLE>
<CAPTION>
                                                           UNREALIZED
                                                         --------------
                                                ADJUSTED                 FAIR
                                                  COST   GAINS (LOSSES)  VALUE
                                                -------- ----- -------- -------
<S>                                             <C>      <C>   <C>      <C>
Trading securities:
  Securities and obligations of the U.S.
   Treasury and other U.S. government
   agencies.................................... $26,986  $ 98    $ (1)  $27,083
  Other short-term obligations.................   6,126   --      --      6,126
  Corporate bonds and commercial paper.........   4,035     3      (3)    4,035
                                                -------  ----    ----   -------
                                                $37,147  $101    $ (4)  $37,244
                                                =======  ====    ====   =======
</TABLE>
 
<TABLE>
<CAPTION>
                                                         UNREALIZED
                                              ADJUSTED --------------- CARRYING
                                                COST   GAINS  (LOSSES)  VALUE
                                              -------- ------ -------- --------
<S>                                           <C>      <C>    <C>      <C>
Investments available for sale:
  Equity securities.......................... $  4,063 $7,894  $ --    $ 11,957
                                              ======== ======  =====   ========
<CAPTION>
                                                         UNREALIZED
                                              ADJUSTED ---------------   FAIR
                                                COST   GAINS  (LOSSES)  VALUE
                                              -------- ------ -------- --------
<S>                                           <C>      <C>    <C>      <C>
Investments held to maturity:
  Securities and obligations of the U.S.
   Treasury and other U.S. government
   agencies.................................. $108,048 $   13  $ (45)  $108,016
  Certificates of deposit....................    7,550    --     --       7,550
                                              -------- ------  -----   --------
                                              $115,598 $   13  $ (45)  $115,566
                                              ======== ======  =====   ========
</TABLE>
 
                                      43
<PAGE>
 
                                 CENTOCOR, INC.
 
            NOTES TO CONSOLIDATED FINANCIAL STATEMENTS--(CONTINUED)
 
 
  At December 31, 1997, these securities were classified as follows (in
thousands):
 
<TABLE>
    <S>                                                                <C>
    Cash equivalents.................................................. $ 43,734
    Short-term investments............................................  109,108
    Long-term investments.............................................   11,957
                                                                       --------
                                                                       $164,799
                                                                       ========
</TABLE>
 
  The Company has agreed to maintain investments with fair values of $7,260,000
as of December 31, 1997 at certain banks as collateral for loans from those
banks. See Note 9--Debt.
 
  At December 31, 1996, securities classified as trading, available for sale
and held to maturity are summarized below (in thousands).
 
<TABLE>
<CAPTION>
                                                         UNREALIZED
                                             ADJUSTED ----------------   FAIR
                                               COST    GAINS  (LOSSES)  VALUE
                                             -------- ------- -------- --------
<S>                                          <C>      <C>     <C>      <C>
Trading securities:
  Securities and obligations of the U.S.
   Treasury and other U.S. government
   agencies................................. $20,058  $    20   $(18)  $20,060
  Other short-term obligations..............   1,024      --     --      1,024
  Corporate bonds and commercial paper......   3,875        6     (3)    3,878
                                             -------  -------   ----   -------
                                             $24,957  $    26   $(21)  $24,962
                                             =======  =======   ====   =======
<CAPTION>
                                                         UNREALIZED
                                             ADJUSTED ---------------- CARRYING
                                               COST    GAINS  (LOSSES)  VALUE
                                             -------- ------- -------- --------
<S>                                          <C>      <C>     <C>      <C>
Investments available for sale:
  Equity securities......................... $ 7,160  $ 2,342   $--    $ 9,502
                                             =======  =======   ====   =======
</TABLE>
 
<TABLE>
<CAPTION>
                                                          UNREALIZED
                                               CARRYING --------------   FAIR
                                                VALUE   GAINS (LOSSES)  VALUE
                                               -------- ----- -------- --------
<S>                                            <C>      <C>   <C>      <C>
Investments held to maturity:
  Securities and obligations of the U.S.
   Treasury and other U.S. government
   agencies................................... $111,488 $ 46   $(117)  $111,417
  Certificates of deposit.....................    8,603  --      --       8,603
  Corporate bonds and commercial paper........    7,872    8      (4)     7,876
                                               -------- ----   -----   --------
                                               $127,963 $ 54   $(121)  $127,896
                                               ======== ====   =====   ========
</TABLE>
 
  At December 31, 1996, these securities were classified as follows (in
thousands):
 
<TABLE>
    <S>                                                                <C>
    Cash equivalents.................................................. $ 32,563
    Short-term investments............................................  120,362
    Long-term investments.............................................    9,502
                                                                       --------
                                                                       $162,427
                                                                       ========
</TABLE>
 
                                       44
<PAGE>
 
                                CENTOCOR, INC.
 
            NOTES TO CONSOLIDATED FINANCIAL STATEMENTS--(CONTINUED)
 
 
NOTE 6
 
INVENTORY
 
  Inventory, net of reserves, consists of the following (in thousands):
 
<TABLE>
<CAPTION>
                                                                  DECEMBER 31,
                                                                 ---------------
                                                                  1997    1996
                                                                 ------- -------
    <S>                                                          <C>     <C>
    Raw materials............................................... $ 4,646 $ 5,824
    Work in process.............................................  12,850   7,948
    Finished goods..............................................  10,281  10,043
                                                                 ------- -------
                                                                 $27,777 $23,815
                                                                 ======= =======
</TABLE>
 
  Inventories have various expiration dates. The Company continually evaluates
the extent of inventory reserves considered necessary based upon the future
regulatory and commercial status of such products. There can be no assurance
that additional reserves for inventories will not be required in the future.
 
NOTE 7
 
INTANGIBLE AND OTHER ASSETS
 
  Intangible and other assets consist of the following, net of accumulated
amortization of $16,311,000 and $10,804,000 at December 31, 1997 and 1996,
respectively, (in thousands):
 
<TABLE>
<CAPTION>
                                                                 DECEMBER 31,
                                                                ---------------
                                                                 1997    1996
                                                                ------- -------
    <S>                                                         <C>     <C>
    Licenses................................................... $ 5,339 $ 5,378
    Goodwill...................................................     --    5,158
    Prepaid royalties related to CPIII.........................  29,398     --
    Debt issuance costs........................................     598     755
    Deferred charges...........................................  23,084  23,026
    Other......................................................   2,869   1,017
                                                                ------- -------
                                                                $61,288 $35,334
                                                                ======= =======
</TABLE>
 
  Prepaid royalties related to CPIII at December 31, 1997 represent an advance
payment of approximately $13,600,000 in cash paid to the former limited
partners of CPIII in connection with the purchase of the limited partnership
interests in CPIII and an additional $15,800,000 payable to the former limited
partners of CPIII in connection with the revision of future royalties. See
Note 3--Commitments and Contingencies.
 
  Deferred charges at December 31, 1997 and 1996 include a prepayment of
certain future royalties and a prepayment associated with the
commercialization and market development of ReoPro.
 
  In June 1997, the Company sold its U.K. diagnostic manufacturing facility
and its related infectious disease product line. In connection with the
transaction the Company recorded a one-time charge to earnings of $4,565,000
in the second quarter of 1997, a component of which was the write-off of
goodwill on the facility and related business.
 
  Licensing agreements and other assets are reviewed for impairment whenever
events or circumstances provide evidence that suggest that the carrying amount
of the asset may not be recoverable. Impairment is evaluated by using
identified or expected cash flows.
 
                                      45
<PAGE>
 
                                CENTOCOR, INC.
 
            NOTES TO CONSOLIDATED FINANCIAL STATEMENTS--(CONTINUED)
 
 
NOTE 8
 
ACCRUED EXPENSES
 
  Accrued expenses consist of the following (in thousands):
 
<TABLE>
<CAPTION>
    DECEMBER 31,                                                  1997    1996
    ------------                                                 ------- -------
    <S>                                                          <C>     <C>
    Compensation................................................ $10,177 $ 7,320
    Interest....................................................     824     823
    Research....................................................  17,541   5,496
    Royalties...................................................  17,561   7,973
    Other.......................................................   8,100   7,328
                                                                 ------- -------
                                                                 $54,203 $28,940
                                                                 ======= =======
</TABLE>
 
NOTE 9
 
DEBT
 
 Notes Payable
 
  Notes payable at December 31, 1997 and 1996 consists of $5,940,000 and
$6,897,000, respectively, of borrowings under short-term notes at an interest
rate of 3.9 and 3.2 percent per annum at December 31, 1997 and 1996,
respectively, payable in Dutch guilders no later than March 28, 1998. These
borrowings are secured by investments at the lending bank of $7,260,000.
 
 Long-term debt
 
  On October 16, 1991, the Company issued $125,000,000 principal amount of 6
3/4% Convertible Debentures due October 16, 2001. The 6 3/4% Convertible
Debentures were initially convertible by the holders into approximately
2,049,000 shares of the Company's Common Stock at a conversion price of $61.00
per share at any time prior to redemption or maturity. The 6 3/4% Convertible
Debentures are redeemable by the Company for cash in whole or in part until
October 16, 2001 at amounts ranging up to 102 percent of the principal amount
of the 6 3/4% Convertible Debentures. The Company may be required to redeem
the 6 3/4% Convertible Debentures at their principal amount at the option of
the holders of the 6 3/4% Convertible Debentures in certain limited
circumstances, including a change in control of the Company.
 
  In the second quarter of 1996, the Company purchased $70,235,000 of its 6
3/4% Convertible Debentures which were subsequently retired. At December 31,
1997 and 1996, $54,765,000 of the 6 3/4% Convertible Debentures remain
outstanding and are convertible into approximately 898,000 shares of the
Company's Common Stock.
 
  The fair value of the Company's long-term debt at December 31, 1997
(consisting of the Company's 6 3/4% Convertible Debentures outstanding),
principally determined by quoted market prices, was $54,765,000 as compared to
its carrying value of $54,765,000. The carrying amount of the Company's notes
payable at December 31, 1997 approximates their fair value.
 
  7 1/4% Percent Notes
 
  In March 1996, the Company called for redemption of 7 1/4% Convertible Notes
at a redemption price of 103.222 percent of the outstanding principal amount.
The outstanding principal amount of the 7 1/4% Convertible
 
                                      46
<PAGE>
 
                                CENTOCOR, INC.
 
            NOTES TO CONSOLIDATED FINANCIAL STATEMENTS--(CONTINUED)
 
Notes was $106,640,000 at December 31, 1995. The Company issued approximately
3,831,000 shares of Common Stock upon conversion of approximately $106,302,000
principal amount of the 7 1/4% Convertible Notes and paid $338,000 in cash to
redeem the remaining 7 1/4% Convertible Notes outstanding which were not
converted.
 
NOTE 10
 
OTHER CURRENT LIABILITIES
 
  In June 1997, the Company announced that it has reached an agreement to
settle the litigation brought by PaineWebber R&D Partners II, L.P. on behalf
of CPIII, against Centocor arising out of Centocor's sales and distribution
agreement with Lilly with respect to ReoPro (See Note 3). The settlement is
conditional on Delaware Chancery Court approval. The agreement provides, among
other things, for Centocor to pay the former limited partners of CPIII
$10,800,000 from which attorney's fees and expenses will be deducted, an
additional $5,000,000, if and when cumulative world-wide sales of ReoPro
exceed $600 million and a revision to the royalties payable to the former
limited partners of CPIII. At December 31, 1997 the Company has recorded a
current liability for the $15,800,000 for these probable payments to the
former limited partners of CPIII.
 
NOTE 11
 
SHAREHOLDERS' EQUITY
 
 Capital Stock
 
  In 1997, the Company issued 876,000 shares of its Common Stock par value
$.01 per share in connection with the exercise of options. In 1996 and 1995,
respectively, the Company issued 1,596,000 and 1,388,000 shares of its Common
Stock in connection with the exercise of options and warrants. In March 1996,
the Company completed a public offering of 4,025,000 shares, and in April 1996
the Company issued 3,450,000 shares as a result of conversion of the Company's
7 1/4% Convertible Notes. Additionally, in July 1996, the Company issued
920,716 shares in connection with its agreements with Lilly. At December 31,
1997, approximately 6,661,000 shares of Common Stock were reserved for
issuance upon exercise of stock options, pursuant to employee retirement
savings and stock award plans and agreements, and upon conversion of
convertible debt securities. Additionally, at December 31, 1997 and 1996,
respectively, approximately 385,000 shares of preferred stock were reserved
for issuance under a shareholder rights plan which is further described below.
 
 Warrants
 
  At December 31, 1996, warrants to purchase approximately 127,000 shares of
the Company's Common Stock were outstanding at an exercise price of $49.75,
exercisable to December 31, 1997. At December 31, 1997 the warrants lapsed
without exercise.
 
 Stock Option and Restricted Stock Award Plans
 
  The Company maintains stock option plans pursuant to which options to
purchase a total of approximately 9,050,000 shares of its Common Stock have
been authorized for grant to the Company's employees and to its non-employee
directors. Under the terms of these plans, the option exercise price may not
be less than the fair market value of the underlying stock at the time the
option is granted. The options granted under these plans generally expire upon
the earlier of the termination of the optionee's employment or service or ten
years from the date of the grant. Additionally, non-qualified stock options
have been granted to certain directors and employees of, and certain
consultants to, the Company pursuant to non-qualified stock option agreements
with terms similar to those set forth in the plans.
 
                                      47
<PAGE>
 
                                CENTOCOR, INC.
 
            NOTES TO CONSOLIDATED FINANCIAL STATEMENTS--(CONTINUED)
 
 
  The following table summarizes the activity with respect to the Company's
stock options (in thousands except per share amounts):
 
<TABLE>
<CAPTION>
                                                                 EXERCISE PRICE
                                                        OPTIONS    PER SHARE
                                                        -------  --------------
<S>                                                     <C>      <C>
Outstanding, December 31, 1994.........................  4,958   $ 6.500-53.500
Granted................................................    713   $ 9.875-24.000
Lapsed or canceled.....................................   (678)  $ 6.875-31.750
Exercised..............................................   (336)  $ 6.500-53.500
                                                        ------   --------------
Outstanding, December 31, 1995.........................  4,657   $ 6.875-51.750
Granted................................................    749   $14.125-39.375
Lapsed or canceled.....................................   (278)  $ 6.875-51.750
Exercised.............................................. (1,162)  $ 6.875-22.625
                                                        ------   --------------
Outstanding, December 31, 1996.........................  3,966   $ 6.875-51.750
Granted................................................    766   $23.750-52.500
Lapsed or canceled.....................................    (74)  $ 7.125-51.000
Exercised..............................................   (876)  $ 6.875-38.310
                                                        ------   --------------
Outstanding, December 31, 1997.........................  3,782   $ 6.875-52.500
                                                        ======   ==============
</TABLE>
 
  At December 31, 1997, the weighted-average remaining contractual life of
outstanding options was 6.73 years. The weighted-average exercise price of the
options outstanding as of December 31, 1997 and 1996 was $22.57 and $17.50,
respectively.
 
  At December 31, 1997, options to purchase a total of approximately 2,112,000
shares of Common Stock were exercisable, and approximately 1,670,000 options
become exercisable as follows (in thousands):
 
<TABLE>
<CAPTION>
    YEARS ENDING DECEMBER 31,                                              SHARES
    -------------------------                                              ------
    <S>                                                                    <C>
       1998...............................................................  617
       1999...............................................................  489
       2000...............................................................  390
       2001...............................................................  174
</TABLE>
 
  The Company maintains a Restricted Common Stock Award Plan, pursuant to
which a total of approximately 2,000,000 shares of the Company's Common Stock
have been authorized for award to eligible employees. The number of shares
awarded in each year and the terms under which such shares vest are determined
by the Board of Directors at the time of the award. Generally, a portion of
the shares awarded vests annually over a period of five years from the date of
the award. As of December 31, 1997, awards of approximately 188,000 shares of
the Company's Common Stock were outstanding and are scheduled to vest in the
following periods (in thousands):
 
<TABLE>
<CAPTION>
    YEARS ENDING DECEMBER 31,                                              SHARES
    -------------------------                                              ------
    <S>                                                                    <C>
       1998...............................................................   87
       1999...............................................................   64
       2000...............................................................   37
</TABLE>
 
  The terms of options unexercisable as of December 31, 1997 for an aggregate
of approximately 1,143,000 shares and restricted stock awards unvested as of
December 31, 1997 for an aggregate of approximately 172,000 shares provide for
the acceleration of the exercisability of such options and the vesting of such
restricted stock
 
                                      48
<PAGE>
 
                                CENTOCOR, INC.
 
            NOTES TO CONSOLIDATED FINANCIAL STATEMENTS--(CONTINUED)
 
awards upon the occurrence of certain events constituting a change in control
of the Company. Further, in such event, the holders of approximately 2,342,000
options may then choose to receive cash through the exercise of a limited
stock appreciation right in lieu of exercising their options.
 
  The Company has adopted Statement of Financial Accounting Standards No. 123,
Accounting For Stock-Based Compensation ("Statement 123"), which was issued in
October 1995 and is effective for transactions entered into in fiscal years
beginning after December 15, 1995. In accordance with the provisions of
Statement 123, which allows the Company to apply Accounting Principles Board
Opinion No. 25 and related interpretations
in accounting for its stock option plans, the Company does not recognize
compensation cost for options granted. If the Company had elected to recognize
compensation cost based on the fair value of the options granted at grant date
as prescribed by Statement 123, net income (loss) and earnings (loss) per
share would have been reduced to the pro forma amounts indicated in the table
below (in thousands except per share amounts):
 
<TABLE>
<CAPTION>
                                                               1997     1996
                                                              ------- --------
   <S>                                                        <C>     <C>
   Net income (loss)--as reported............................ $11,130 $(12,763)
   Net income (loss)--pro forma.............................. $ 5,980 $(17,791)
   Diluted earnings (loss) per share--as reported............ $  0.16 $  (0.19)
   Diluted earnings (loss) per share--pro forma.............. $  0.08 $  (0.27)
</TABLE>
 
  The fair value of each option grant is estimated on the date of grant using
the Black-Scholes option-pricing model with the following average assumptions
for the years ended December 31,
<TABLE>
<CAPTION>
                                                                     1997  1996
                                                                     ----  ----
   <S>                                                               <C>   <C>
   Risk free interest rate..........................................  6.1%  5.6%
   Expected life of option (years)..................................  9.1   9.2
   Expected dividend of option(1)...................................  --    --
   Volatility of stock price........................................ 67.3% 70.3%
</TABLE>
- --------
(1) The Company has never declared or paid any dividends on its Common Stock.
    The Company does not anticipate paying any dividends in the foreseeable
    future and intends to retain future earnings for the development and
    expansion of its business.
 
 Qualified Savings and Retirement Plan
 
  The Company maintains a Qualified Savings and Retirement Plan for the
benefit of its employees. Employees' benefits are based solely on the
employees' discretionary contributions and the Company's discretionary
matching contributions which, for the years ended December 31, 1997 and 1996
totaled $875,000 and $551,000, respectively. The Company generally makes its
discretionary matching contributions in its Common Stock. Employee
contributions to the Plan may be invested in various instruments, including
the Company's Common Stock, at the discretion of the employee.
 
 Shareholder Rights Plan
 
  The Company maintains a Shareholder Rights Plan ("Rights Plan"). Under the
Rights Plan, each common shareholder receives one-half of one Right (a
"Right") for each share of Common Stock held. Each Right entitles the holder
to purchase from the Company one one-hundredth of a share of Series A
Preferred Stock at an exercise price of $170. The Rights will become
exercisable and will detach from the Common Stock in the event any individual
or group acquires 20 percent or more of the Common Stock, or announces a
tender or exchange offer which, if consummated, would result in the ownership
by that person or group of at least 30 percent of the Common Stock.
 
                                      49
<PAGE>
 
                                CENTOCOR, INC.
 
            NOTES TO CONSOLIDATED FINANCIAL STATEMENTS--(CONTINUED)
 
 
  If, following an acquisition of 20 percent or more of the Common Stock, the
Company is acquired by any person in a merger or other business combination
transaction or sells more than 50 percent of its assets or earning power to
any person, each Right will entitle the holder to purchase, for the exercise
price, common stock of the acquiring company with a value of twice the
exercise price. In addition, if any person acquires 30 percent or more of the
Common Stock, each Right will entitle the holder, other than an acquiring
person, to purchase Common Stock of the Company with a value of twice the
exercise price. The Rights also provide for protection against self-dealing
transactions by a 20 percent shareholder.
 
  The Company may redeem the Rights at $.02 per Right at any time until the
tenth day after the acquisition by a person or group beneficially owning 20
percent or more of its Common Stock. The Rights will expire on September 26,
1998 unless earlier redeemed.
 
NOTE 12
 
GEOGRAPHIC AND CUSTOMER INFORMATION
 
<TABLE>
<CAPTION>
                                        GEOGRAPHIC INFORMATION (IN THOUSANDS)
                                       -------------------------------------------
                                                      INCOME       IDENTIFIABLE
YEARS ENDED DECEMBER 31,                 REVENUE      (LOSS)          ASSETS
- ------------------------               ------------ ------------  ----------------
<S>                                    <C>          <C>           <C>
1997
  United States....................... $    138,223 $     14,166    $    306,980
  Europe..............................       52,693       (1,419)         97,715
  Other...............................        9,868       (1,617)            409
                                       ------------ ------------    ------------
                                       $    200,784 $     11,130    $    405,104
                                       ============ ============    ============
1996
  United States....................... $     86,743 $    (23,125)   $    243,182
  Europe..............................       36,194       10,333          97,450
  Other...............................       12,548           29             489
                                       ------------ ------------    ------------
                                       $    135,485 $    (12,763)   $    341,121
                                       ============ ============    ============
1995
  United States....................... $     35,272 $    (61,208)   $    160,094
  Europe..............................       43,466        4,076         100,190
  Other...............................          178          --              --
                                       ------------ ------------    ------------
                                       $     78,916 $    (57,132)   $    260,284
                                       ============ ============    ============
</TABLE>
 
  Revenues from unaffiliated customers is based on the location of the
customers. Income (loss) by geographic area consists of the related income
(loss) of the Company's subsidiaries based upon the location of their
respective operations. Identifiable assets by geographic area are those assets
used in the Company's operations in those areas.
 
 Customer Information
 
  During 1997, approximately 81% of the Company's total product sales were
sales of ReoPro to one customer, Lilly. During 1996, approximately 67% of the
Company's total product sales were sales of ReoPro to one customer, Lilly.
During 1995, approximately 50% of the Company's total product sales were to
three customers, as follows: 24% to Lilly, 11% to Glaxo Wellcome and 15% to
Toray-Fuji Bionics, Inc.
 
                                      50
<PAGE>
 
                                CENTOCOR, INC.
 
            NOTES TO CONSOLIDATED FINANCIAL STATEMENTS--(CONTINUED)
 
 
NOTE 13
 
CONTRACT REVENUES
 
  Pursuant to the Company's agreements with Lilly, the Company recognized
revenues of $10,000,000 for the year ended December 31, 1995 related to the
achievement of ReoPro milestones.
 
  The Company incurred expenses of approximately $1,486,000, $29,121,000 and
$29,900,000 for the years ended December 31, 1997, 1996 and 1995,
respectively, representing aggregate CPIII research costs funded by the
Company in order to continue the progress of the research program and to
preserve the value of its purchase option which it exercised in January 1997.
 
  The Company has entered into various commercialization agreements under
which it has recognized revenues from non-refundable fees or milestone
payments in support of its research and development efforts. Revenues recorded
under these agreements amounted to $4,430,000, $3,355,000 and $13,915,000 for
the years ended December 31, 1997, 1996 and 1995, respectively.
 
NOTE 14
 
SPECIAL CHARGES
 
  In June 1997, the Company sold its U.K. diagnostic manufacturing facility
and its related infectious disease product line. In connection with the
transaction the Company recorded a one-time charge to earnings of $4,565,000
in the second quarter of 1997. The Company recorded a charge to earnings of
$3,750,000 for the years ended December 31, 1995 in connection with the
settlement of certain litigation. Other income (expenses) also includes the
Company's equity share of the gain and/or losses of an investee company.
 
  In 1995, the Company recorded a charge of $1,642,000 representing severance
costs in connection with the downsizing of its workforce.
 
NOTE 15
 
INCOME TAXES
 
  The components of the deferred tax assets are as follows as of December 31,
1997 and 1996 (in thousands):
 
<TABLE>
<CAPTION>
                                                             1997       1996
                                                           ---------  ---------
   <S>                                                     <C>        <C>
   Tax credits............................................ $  10,822  $   7,216
   Loss carryforwards.....................................   246,737    237,401
   Acquired research......................................    23,206     25,499
   Deferred R&D expense...................................     9,689     16,385
   Capital loss carryforwards.............................     5,536        --
   Facilities and equipment...............................     2,088      2,207
   Compensation and benefits..............................     1,359        --
   Litigation.............................................       479        --
   Depreciation...........................................     1,138      1,050
   Asset impairment.......................................       350      1,553
                                                           ---------  ---------
   Total..................................................   301,404    291,311
   Valuation reserve......................................  (301,404)  (291,311)
                                                           ---------  ---------
   Net deferred tax assets................................ $     --   $     --
                                                           =========  =========
</TABLE>
 
                                      51
<PAGE>
 
                                CENTOCOR, INC.
 
            NOTES TO CONSOLIDATED FINANCIAL STATEMENTS--(CONTINUED)
 
 
  At December 31, 1997, the Company had research and development, orphan drug
and other tax credits of approximately $10,440,000, substantially all with
expiration dates ranging from 1999 to 2012, and minimum tax credits of
approximately $381,000 which do not expire.
 
  Realization of net deferred tax assets related to these items is dependent
on future earnings, which are uncertain. Accordingly, a valuation reserve was
recorded by the Company and, therefore, the Company had no net deferred tax
assets at December 31, 1997.
 
  Of the $301 million valuation allowance at December 31, 1997, approximately
$25 million relating to deductions for non-qualified stock options will be
credited to paid-in-capital if realized. Included in loss carryforwards at
December 31, 1997 are unused foreign tax subsidies that may be used to offset
foreign taxable income of approximately $20 million. The Company had net
operating loss carryforwards available in the United States for federal income
tax purposes of approximately $634 million which will begin to expire at
various dates from the year 2005 to 2012. Net operating loss carryforwards may
also be subject to various annual and other limitations on the amounts to be
utilized.
 
NOTE 16
 
LEASES
 
  The Company is lessee under various non-cancelable operating leases,
covering certain of the Company's facilities and equipment. The facility
leases generally provide for the Company to pay all taxes and operating costs
associated with the facility.
 
  The aggregate minimum rental commitments of leases are as follows:
 
<TABLE>
<CAPTION>
   YEARS ENDING DECEMBER 31,
   -------------------------
   <S>                                                                 <C>
   1998............................................................... 2,000,000
   1999............................................................... 1,377,000
   2000...............................................................   320,000
   2001...............................................................   164,000
   2002...............................................................   149,000
   Thereafter.........................................................       --
</TABLE>
 
  Rent expense was $2,913,000, $3,162,000 and $3,308,000, for the years ended
December 31, 1997, 1996 and 1995, respectively.
 
NOTE 17
 
SUPPLEMENTAL INFORMATION ON CASH FLOWS
 
  Interest paid was $3,910,000, $12,615,000 and $18,358,000, in 1997, 1996,
and 1995, respectively.
 
  Income tax payments of $131,000, $13,000 and $9,000 were made in 1997, 1996
and 1995, respectively.
 
  In 1996, in consideration of the amendment to the Sales and Distribution
Agreement and other activities in connection with commercialization and market
development of ReoPro, Centocor issued 920,716 common shares to Lilly.
 
  In 1997, the Company had unrealized gains on its equity investments of
$7,894,000. In 1996 and 1995, the Company had unrealized gains on its equity
investments of $2,342,000.
 
                                      52
<PAGE>
 
                                CENTOCOR, INC.
 
            NOTES TO CONSOLIDATED FINANCIAL STATEMENTS--(CONTINUED)
 
 
NOTE 18
 
QUARTERLY FINANCIAL DATA (UNAUDITED)
 
<TABLE>
<CAPTION>
                                                  THREE MONTHS ENDED
                                       -----------------------------------------
                                       MARCH 31 JUNE 30 SEPTEMBER 30 DECEMBER 31
                                       -------- ------- ------------ -----------
                                         (IN THOUSANDS EXCEPT PER SHARE DATA)
<S>                                    <C>      <C>     <C>          <C>
1997
  Total revenues...................... $45,036  $53,643   $51,401      $50,704
  Sales...............................  44,936   51,007    50,171       50,240
  Gross profit from sales.............  27,130   28,824    31,864       30,578
  Net income(1).......................   3,271      720     4,441        2,698
  Basic earnings per share(2)......... $   .05  $   .01   $   .06      $   .04
  Diluted earnings per share(2)....... $   .05  $   .01   $   .06      $   .04
  Operating earnings per share(3)..... $   .05  $   .07   $   .06      $   .04
</TABLE>
 
<TABLE>
<CAPTION>
                                                THREE MONTHS ENDED
                                     -------------------------------------------
                                     MARCH 31  JUNE 30  SEPTEMBER 30 DECEMBER 31
                                     --------  -------  ------------ -----------
<S>                                  <C>       <C>      <C>          <C>
1996
  Total revenues.................... $21,882   $30,586    $39,179      $43,838
  Sales.............................  21,710    29,526     38,309       42,585
  Gross profit from sales...........  11,156    14,972     20,657       24,251
  Net income (loss)(1)..............  (9,698)   (4,323)    (1,635)       2,893
  Basic earnings (loss) per
   share(2)......................... $  (.16)  $  (.06)   $  (.02)     $   .04
  Diluted earnings (loss) per
   share(2)......................... $  (.16)  $  (.06)   $  (.02)     $   .04
  Operating earnings per share(3)... $  (.16)  $  (.07)   $  (.02)     $   .04
</TABLE>
- --------
(1) During the second quarter of 1997, the Company sold its U.K. diagnostic
    manufacturing facility and its related infectious disease product line. In
    connection with the transaction the Company recorded a one-time charge to
    earnings of $4,565,000. During the second quarter of 1996, the Company
    recorded a net gain on the extinguishment of debt of $705,000.
(2) The computation of earnings or loss per share in each period is based on
    the weighted average number of common shares outstanding. When dilutive,
    stock options and warrants are included as share equivalents using the
    treasury stock method, for diluted earnings per share.
(3) Operating earnings (loss) per share represents diluted earnings (loss) per
    share without the effects of non-operating activities noted in footnote 1.
 
NOTE 19
 
EARNINGS PER SHARE
 
  In February 1997, the FASB issued Statement of Financial Accounting
Standards No. 128, Earnings Per Share ("Statement 128"), which was effective
for financial statements issued for periods ending after December 15, 1997,
including interim periods. This Statement establishes standards for computing
and presenting earnings per share ("EPS") and applies to entities with
publicly held common stock or potential common stock. This Statement
simplifies the standards for computing earnings per share previously found in
Accounting Principles Board Opinion No. 15, Earnings Per Share, and makes them
comparable to international EPS standards. It replaces the presentation of
primary EPS with a presentation of basic EPS. It also requires dual
presentation of basic and diluted EPS on the face of the income statement for
all entities with complex capital structures and requires a reconciliation of
the numerator and denominator for the basic EPS computation to the numerator
and denominator of the diluted EPS computation. This Statement requires
restatement of all prior period EPS data presented. The Company adopted
Statement 128 in December of 1997. The adoption of Statement 128 did not have
a significant effect on its financial statements.
 
                                      53
<PAGE>
 
                                CENTOCOR, INC.
 
            NOTES TO CONSOLIDATED FINANCIAL STATEMENTS--(CONTINUED)
 
 
<TABLE>
<CAPTION>
                                              FOR THE YEAR ENDED DECEMBER 31,
                                                           1997
                                            -----------------------------------
                                              INCOME       SHARES     PER SHARE
                                            (NUMERATOR) (DENOMINATOR)  AMOUNT
                                            ----------- ------------- ---------
<S>                                         <C>         <C>           <C>
  Basic EPS................................   $11,130      69,809       $0.16
  Incremental shares from assumed exercise
   of dilutive options and warrants........       --        1,961
                                              -------      ------
  Diluted EPS..............................   $11,130      71,770       $0.16
                                              =======      ======
</TABLE>
 
  For the years ended December 31, 1996 and 1995 no exercise of options and
warrants is assumed since their effect is antidilutive.
 
NOTE 20
 
SUBSEQUENT EVENT (UNAUDITED)
 
  On February 12, 1998, the Company entered into a definitive agreement with
Roche Healthcare Limited, a Bermuda corporation and a subsidiary of Roche
Holding Ltd., a Swiss corporation, to acquire the exclusive United States and
Canadian product rights for Retavase, a leading acute-care cardiovascular
drug, and other related assets for $335,000,000 in cash (the "Acquisition").
Retavase is a fibrinolytic ("clot-buster") product, which is administered
usually in the hospital emergency room, for the treatment of acute myocardial
infarction (heart attack). In connection with the Acquisition, Centocor
expects to record a one-time, pretax charge of approximately $138,500,000 in
the first quarter of 1998, representing the acquisition of in-process research
and development.
 
  Consummation of the Acquisition is not conditioned upon the receipt by the
Company of financing sufficient to fund the purchase price. The Company has,
however, received a commitment letter from a leading investment bank pursuant
to which such investment bank has committed to purchase from Centocor
securities in an amount sufficient to provide $335,000,000 of net proceeds to
the Company. The Company intends to finance the Acquisition through the
issuance of convertible subordinated debentures in an unregistered offering.
 
                                      54
<PAGE>
 
                             REPORT OF MANAGEMENT
 
  The consolidated financial statements presented in this report have been
prepared by the Company's management in conformity with generally accepted
accounting principles from the Company's financial records. The Company's
management is responsible for all information and representations made in
those financial statements and for their integrity and objectivity. In those
cases where judgment and best estimates are necessary, appropriate
consideration is given to materiality in the preparation of the financial
statements. The Company's management has also prepared the other information
in this report and is responsible for its accuracy and consistency with the
financial statements.
 
  The Company's management has designed systems of internal accounting
controls to provide reasonable, but not absolute, assurance that assets are
safeguarded from unauthorized use or disposition, and that transactions are
recorded according to management's policies and procedures. The concept of
reasonable assurance is based on the recognition that there are inherent
limitations in all systems of internal accounting control and that the costs
of such systems should not exceed the benefits to be derived. These systems
are continually reviewed and modified, where appropriate, to maintain such
assurance. Additionally, in connection with their annual audit, independent
auditors perform examinations in accordance with generally accepted auditing
standards, which include a review of the system of internal accounting
controls to the extent necessary in order to determine the nature, timing, and
extent of audit tests to be applied on the financial statements. The Company's
management believes that the Company's system of internal accounting controls
is adequate to accomplish the objectives discussed herein.
 
  The selection of the Company's independent auditors, KPMG Peat Marwick LLP,
has been approved by the Company's Board of Directors. An Audit Committee of
the Board of Directors, composed of three non-management directors, meets
with, and reviews the activities of, corporate financial management and the
independent auditors to ascertain that each is properly discharging its
responsibilities. The independent auditors also meet separately with the Audit
Committee without management present, to discuss the results of their work,
the adequacy of internal accounting controls, and the quality of financial
reporting.
 
                                      55
<PAGE>
 
                         INDEPENDENT AUDITOR'S REPORT
 
The Board of Directors and Shareholders
Centocor, Inc.:
 
  We have audited the accompanying consolidated balance sheets of Centocor,
Inc. and subsidiaries as of December 31, 1997 and 1996, and the related
consolidated statements of operations, cash flows and shareholders' equity for
each of the years in the three-year period ended December 31, 1997. In
connection with our audits of the consolidated financial statements, we also
have audited the financial statement schedule. These consolidated financial
statements and financial statement schedule are the responsibility of the
Company's management. Our responsibility is to express an opinion on these
consolidated financial statements and financial statement schedule 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 financial position of Centocor,
Inc. and subsidiaries as of December 31, 1997 and 1996 and the results of
their operations and their cash flows for each of the years in the three-year
period ended December 31, 1997, in conformity with generally accepted
accounting principles. Also in our opinion, the related financial statement
schedule, when considered in relation to the basic consolidated financial
statements taken as a whole, presents fairly, in all material respects, the
information set forth therein.
 
KPMG Peat Marwick LLP
 
Philadelphia, Pennsylvania
January 28, 1998
 
                                      56
<PAGE>
 
ITEM 9. CHANGES IN AND DISAGREEMENTS WITH ACCOUNTANTS ON ACCOUNTING AND
FINANCIAL DISCLOSURE
 
  Not Applicable
 
                                   PART III
 
ITEM 10. DIRECTORS AND EXECUTIVE OFFICERS OF THE REGISTRANT
 
ITEM 11. EXECUTIVE COMPENSATION
 
ITEM 12. SECURITY OWNERSHIP OF CERTAIN BENEFICIAL OWNERS AND MANAGEMENT
 
ITEM 13. CERTAIN RELATIONSHIPS AND RELATED TRANSACTIONS
 
  In accordance with General Instruction G(3), the information called for by
Items 10, 11, 12 and 13 of Part III are incorporated herein by reference from
the Company's definitive Proxy Statement for the Centocor Annual Meeting of
Shareholders to be held on May 13, 1998, which definitive Proxy Statement will
be filed with the Securities and Exchange Commission pursuant to Regulation
14A.
 
                                      57
<PAGE>
 
                                    PART IV
 
ITEM 14. EXHIBITS, FINANCIAL STATEMENTS SCHEDULES, AND REPORTS ON FORM 8-K
 
  a. Documents filed as part of the Report:
 
    i. Not applicable
 
    ii. Financial Statement Schedules:
 
      Schedule II--Valuation and Qualifying Accounts
 
      Schedules, other than those listed above, have been omitted because
      of the absence of conditions under which they are required or
      because the required information is included in the financial
      statements or the notes thereto.
 
    iii. Exhibits:
 
<TABLE>
       <C>    <S>
        3.1   Restated Articles of Incorporation (incorporated by reference to
              Exhibit 3.1 to Form S-1 Registration Statement, File No. 2-
              80098).
        3.2   Statement of Reduction of Authorized Shares filed September 19,
              1983 (incorporated by reference to Exhibit 3.2 to Registrant's
              Annual Report on Form 10-K for the year ended December 31, 1986).
        3.3   Statement of Reduction of Authorized Shares filed January 19,
              1984 (incorporated by reference to Exhibit 3.3 to Registrant's
              Annual Report on Form 10-K for the year ended December 31, 1986).
        3.4   Articles of Amendment filed April 18, 1984 (incorporated by
              reference to Exhibit 3.4 to Registrant's Annual Report on Form
              10-K for the year ended December 31, 1986).
        3.5   Statement of Reduction of Authorized Shares filed February 25,
              1985 (incorporated by reference to Exhibit 3.5 to Registrant's
              Annual Report on Form 10-K for the year ended December 31, 1986).
        3.6   Statement of Reduction of Authorized Shares filed May 6, 1985
              (incorporated by reference to Exhibit 3.6 to Registrant's Annual
              Report on Form 10-K for the year ended December 31, 1986).
        3.7   Statement of Reduction of Authorized Shares filed October 23,
              1985 (incorporated by reference to Exhibit 3.7 to Registrant's
              Annual Report on Form 10-K for the year ended December 31, 1986).
        3.8   Articles of Amendment filed April 16, 1987 (incorporated by
              reference to Exhibit 3.8 to Registrant's Annual Report on Form
              10-K for the year ended December 31, 1987).
        3.9   Articles of Amendment filed April 21, 1988 (incorporated by
              reference to Exhibit 3.9 to Registrant's Annual Report on Form
              10-K for the year ended December 31, 1988).
        3.10  Articles of Amendment filed April 26, 1988 (incorporated by
              reference to Exhibit 3.10 to Registrant's Annual Report on Form
              10-K for the year ended December 31, 1988).
        3.11  Statement Re Series A Preferred Stock filed October 11, 1988
              (incorporated by reference to Exhibit 3.11 to Registrant's Annual
              Report on Form 10-K for the year ended December 31, 1988).
        3.12  Articles of Amendment filed April 13, 1990 (incorporated by
              reference to Exhibit 3.12 to Registrant's Annual Report on Form
              10-K for the year ended December 31, 1990).
        3.13  Articles of Amendment filed April 26, 1991 (incorporated by
              reference to Exhibit 3.13 to Registrant's Annual Report on Form
              10-K for the year ended December 31, 1991).
</TABLE>
 
                                      58
<PAGE>
 
<TABLE>
       <C>    <S>
        3.14  Statement of Correction filed October 16, 1991 to Articles of
              Amendment filed April 26, 1991 (incorporated by reference to
              Exhibit 3.14 to Registrant's Annual Report on Form 10-K for the
              year ended December 31, 1991).
        3.15  By-Laws of Centocor, Inc. as amended October 30, 1992
              (incorporated by reference to Exhibit 3.15 to Registrant's Annual
              Report on Form 10-K for the year ended December 31, 1992).
        3.16  By-laws of Centocor, Inc. as amended December 10, 1997.
        4.1   Specimen Certificate for Common Stock (incorporated by reference
              to Exhibit 4 to Amendment No. 1 to Form S-1 Registration
              Statement, File No. 2-80098).
        4.2   Rights Agreement between Centocor, Inc. and the First National
              Bank of Boston as Rights Agent dated September 26, 1988
              (incorporated by reference to Exhibit 4 to Registrant's Current
              Report on Form 8-K dated September 26, 1988).
        4.3   Form of Indenture between Centocor, Inc. and Chase Manhattan
              Trustees Limited as Trustee Dated as of October 16, 1991
              (incorporated by reference to Exhibit 4.3 to Form S-3
              Registration Statement, Reg. No. 33-44231).
        4.4   Form of Debenture Issued to Purchasers of 6 3/4% Convertible
              Subordinated Debentures Due October 16, 2001 (incorporated by
              reference to Exhibit 4.3 to Form S-3 Registration Statement, Reg.
              No. 33-44231).
        4.5   Form of Series T Warrant Issued to Purchasers of Units, each Unit
              consisting of one share of Tocor II Callable Common Stock, one
              Series T warrant to purchase one share of Centocor Common Stock,
              and one Callable warrant to purchase one share of Centocor Common
              Stock (incorporated by reference to Exhibit 4.2 to Amendment No.
              4 to Form S-1/S-3 Registration Statement of Tocor II and
              Centocor, Reg. No. 33-44072).
        4.6   Form of Callable Warrant Issued to Purchasers of Units, each Unit
              consisting of one share of Tocor II Callable Common Stock, one
              Series T warrant to purchase one share of Centocor Common Stock,
              and one Callable warrant to purchase one share of Centocor Common
              Stock (incorporated by reference to Exhibit 4.3 to Amendment No.
              4 to Form S-1/S-3 Registration Statement of Tocor II and
              Centocor, Reg. No. 33-44072).
       10.1*  Form of Non-Qualified Stock Option Agreement (incorporated by
              reference to Exhibit 10.01 to Registrant's Annual Report on Form
              10-K for the year ended December 31, 1987).
       10.2*  Incentive Stock Option Plan, as amended (incorporated by
              reference to Exhibit 10.03 to Registrant's Annual Report on Form
              10-K for the year ended December 31, 1986).
       10.3*  1983 Incentive Stock Option Plan, as amended (incorporated by
              reference to Exhibit 10.04 to Registrant's Annual Report on Form
              10-K for the year ended December 31, 1986).
       10.4*  1983 Restricted Common Stock Award Plan, as amended and restated
              (incorporated by reference to Exhibit 10.04 to Registrant's
              Annual Report on Form 10-K for the year ended December 31, 1993).
       10.5*  1987 Non-Qualified Stock Option Plan, as amended and restated
              (incorporated by reference to Exhibit 10.05 to Registrant's
              Annual Report on Form 10-K for the year ended December 31, 1990).
       10.6*  1989 Non-Employee Directors' Non-Qualified Stock Option Plan
              (incorporated by reference to Exhibit 10.06 to Registrant's
              Annual Report on Form 10-K for the year ended December 31, 1989).
</TABLE>
 
                                       59
<PAGE>
 
<TABLE>
       <C>    <S>
       10.7   Lease Agreement for property located at Great Valley Parkway,
              Malvern, PA 19355 (incorporated by reference to Exhibit 10.07 to
              Registrant's Annual Report on Form 10-K for the year ended
              December 31, 1989).
       10.8   Partnership Purchase Option Agreement among Centocor, Inc., CCIP,
              Centocor Development Corporation I, each Class A limited partner
              and the Class B limited partner, dated September 12, 1985
              (incorporated by reference to Exhibit 10.53 to Registrant's Post
              Effective Amendment No. 1 to Form S-1 Registration Statement,
              File No. 2-95057).
       10.9   Indemnity Agreement between Centocor, Inc. and CCIP, dated
              September 12, 1985 (incorporated by reference to Exhibit 10.71 to
              Registrant's Post Effective Amendment No. 1 to Form S-1
              Registration Statement, File No. 2-95057).
       10.10* Qualified Savings and Retirement Plan, as amended and restated
              (incorporated by reference to Exhibit 10.14 to Registrant's
              Annual Report on Form 10-K for the year ended December 31, 1989).
       10.11  Partnership Purchase Option Agreement among Centocor, Inc., CPII,
              Centocor Development Corporation II, each Class A limited partner
              and the Class B limited partner, dated December 17, 1986
              (incorporated by reference to Exhibit 10.23 to Registrant's
              Annual Report on Form 10-K for the year ended December 31, 1986).
       10.12  Indemnity Agreement between Centocor, Inc. and CPII, dated
              December 17, 1986 (incorporated by reference to Exhibit 10.26 to
              Registrant's Annual Report on Form 10-K for the year ended
              December 31, 1986).
       10.13  Indemnity Agreement between CPIII and Centocor, Inc., dated
              December 23, 1987 (incorporated by reference to Exhibit 10.41 to
              Registrant's Annual Report on Form 10-K for the year ended
              December 31, 1987).
       10.14  Partnership Purchase Option Agreement among Centocor, Inc.,
              CPIII, Centocor Development Corporation III, and the Class C
              limited partner, dated December 23, 1987 (incorporated by
              reference to Exhibit 10.43 to Registrant's Annual Report on Form
              10-K for the year ended December 31, 1987).
       10.15  Amendment dated March 23, 1988 to Partnership Purchase Option
              Agreement among Centocor, Inc., CPIII, Centocor Development
              Corporation III and the Class C limited partner dated December
              23, 1987 (incorporated by reference to Exhibit 10.37 to
              Registrant's Annual Report on Form 10-K for the year ended
              December 31, 1988).
       10.16  Series E, F and G Preferred Stock Purchase Agreement dated as of
              November 20, 1991 between Centocor Delaware, Inc. and Corvas
              International, Inc. (incorporated by reference to Exhibit 10.28
              to Form S-1 Registration Statement of Corvas International, Inc.
              Reg. No. 33-44555).
       10.17  Sales and Distribution Agreement between Centocor, Inc. and Eli
              Lilly and Company dated July 15, 1992. (The Registrant has
              requested confidential treatment from the Securities and Exchange
              Commission for portions of this Agreement.) (Incorporated by
              reference to Exhibit 10.32 to Registrant's Annual Report on Form
              10-K for the year ended December 31, 1992).
       10.18  Reimbursement Agreement between Centocor, Inc. and Eli Lilly and
              Company dated July 15, 1992. (The Registrant has requested
              confidential treatment from the Securities and Exchange
              Commission for portions of this Agreement.) (Incorporated by
              reference to Exhibit 10.33 to Registrant's Annual Report on Form
              10-K for the year ended December 31, 1992).
</TABLE>
 
                                       60
<PAGE>
 
<TABLE>
       <C>    <S>
       10.19  Investment Agreement between Centocor, Inc. and Eli Lilly and
              Company dated July 15, 1992. (The Registrant has requested
              confidential treatment from the Securities and Exchange
              Commission for portions of this Agreement.) (Incorporated by
              reference to Exhibit 10.34 to Registrant's Annual Report on Form
              10-K for the year ended December 31, 1992).
       10.20  Amendment to Sales and Distribution Agreement among Centocor,
              Inc., Centocor B.V. and Eli Lilly and Company dated June 27,
              1993. (The Registrant has requested confidential treatment from
              the Securities and Exchange Commission for portions of this
              Agreement.) (Incorporated by reference to Exhibit 10.35 to
              Registrant's Annual Report on Form 10-K for the year ended
              December 31, 1993).
       10.21  Option Agreement between Centocor B.V. and Eli Lilly Nederland
              B.V. dated August 20, 1993. (The Registrant has requested
              confidential treatment from the Securities and Exchange
              Commission for portions of this Agreement.) (Incorporated by
              reference to Exhibit 10.36 to Registrant's Annual Report on Form
              10-K for the year ended December 31, 1993).
       10.22  Deed of Mortgage from Centocor B.V. to Eli Lilly Nederland B.V.
              dated August 26, 1993 (incorporated by reference to Exhibit 10.37
              to Registrant's Annual Report on Form 10-K for the year ended
              December 31, 1993).
       10.23  Deed of Pledge from Centocor B.V. to Eli Lilly Nederland B.V.
              dated August 26, 1993 (incorporated by reference to Exhibit 10.38
              to Registrant's Annual Report on Form 10-K for the year ended
              December 31, 1993).
       10.24  Amendment to Sales and Distribution Agreement among Centocor,
              Inc., Centocor B.V. and Eli Lilly and Company dated July 26,
              1996. (The Registrant has requested confidential treatment from
              the Securities and Exchange Commission for portions of this
              Agreement.) (Incorporated by reference to Exhibit 10.24 to
              Registrant's Annual Report on Form 10-K for the year ended
              December 31, 1996).
       10.25  Stock Purchase Agreement made as of December 16, 1993 by and
              between Centocor, Inc. and The Wellcome Foundation Limited
              (incorporated by reference to Exhibit 10(a) to the Registrant's
              Current Report on Form 8-K dated December 16, 1993).
       10.26  Supply, Distribution and Sales Agreement dated December 16, 1993
              by and among Centocor, Inc., Centocor B.V., The Wellcome
              Foundation Limited and Burroughs Wellcome Co. (The Registrant has
              requested confidential treatment from the Securities and Exchange
              Commission for portions of this Agreement.) (Incorporated by
              reference to Exhibit 10(b) to the Registrant's Current Report on
              Form 8-K dated December 16, 1993).
       10.27  Clinical and Regulatory Development Agreement dated December 16,
              1993 among Centocor, Inc., Centocor B.V., The Wellcome Foundation
              Limited and Burroughs Wellcome Co. (The Registrant has requested
              confidential treatment from the Securities and Exchange
              Commission for portions of this Agreement.) (Incorporated by
              reference to Exhibit 10(c) to the Registrant's Current Report on
              Form 8-K dated December 16, 1993).
       10.28  Centocor Technology License Agreement dated as of December 16,
              1993 among Centocor, Inc., Centocor B.V., The Wellcome Foundation
              Limited and Burroughs Wellcome Co. (The Registrant has requested
              confidential treatment from the Securities and Exchange
              Commission for portions of this Agreement.) (Incorporated by
              reference to Exhibit 10(e) to the Registrant's Current Report on
              Form 8-K dated December 16, 1993).
</TABLE>
 
                                       61
<PAGE>
 
<TABLE>
       <C>    <S>
       10.29  Relicense Agreement dated as of December 16, 1993 among Centocor,
              Inc., Centocor B.V., The Wellcome Foundation Limited and
              Burroughs Wellcome Co. (incorporated by reference to Exhibit
              10(f) to the Registrant's Current Report on Form 8-K dated
              December 16, 1993).
       10.30  Appendix A--Glossary of Terms to each of the Agreements dated as
              of December 16, 1993 by and among Centocor, Inc., Centocor B.V.,
              The Wellcome Foundation Limited and Burroughs Wellcome Co. (The
              Registrant has requested confidential treatment from the
              Securities and Exchange Commission for portions of this
              Agreement.) (Incorporated by reference to Exhibit 10(g) to the
              Registrant's Current Report on Form 8-K dated December 16, 1993).
       10.31  First Supplemental Agreement dated as of November 15, 1994 among
              Centocor, Inc., Centocor B.V., The Wellcome Foundation Limited
              and Burroughs Wellcome Co. (The Registrant has requested
              confidential treatment from the Securities and Exchange
              Commission for portions of this Agreement.) (Incorporated by
              reference to Exhibit 10(a) to the Registrant's Current Report on
              Form 8-K dated November 15, 1994).
       10.32  Wellcome Clinical Development Agreement dated as of November 15,
              1994 among Centocor, Inc., Centocor B.V., The Wellcome Foundation
              Limited and Burroughs Wellcome Co. (The Registrant has requested
              confidential treatment from the Securities and Exchange
              Commission for portions of this Agreement.) (Incorporated by
              reference to Exhibit 10(b) to the Registrant's Current Report on
              Form 8-K dated November 15, 1994).
       10.33  Distribution Agreement between Centocor, Inc. and Fujisawa
              Pharmaceutical Co. Ltd dated August 15, 1996. (Registrant has
              requested confidential treatment from the Securities and Exchange
              Commission for portions of this Agreement). (Incorporated by
              reference to exhibit 10.33 to Registrant's Annual Report on Form
              10-K for the year ended December 31, 1996).
       10.34  Asset Purchase Agreement dated February 11, 1998 between Roche
              Healthcare Limited and Centocor, Inc. (The Registrant has
              requested confidential treatment from the Securities and Exchange
              Commission for portions of this Agreement.)
       11     Computation of Earnings (Loss) per Common Share.
       12     Statement re: Computation of Ratios.
       21     Subsidiaries of the Registrant.
       23     Consent of Independent Auditors.
       27     Financial Data Schedule.
</TABLE>
    --------
    * These exhibits constitute compensatory plans.
 
  b. The Registrant has filed the following reports on Form 8-K since the
beginning of the quarter ended December 31, 1997:
 
<TABLE>
<CAPTION>
      DATE OF REPORT     ITEMS COVERED
      --------------     -------------
      <S>                <C>
      January 21, 1998       5, 7
      February 13, 1998      5, 7
</TABLE>
 
  For the purposes of complying with the amendments to the rules governing
Form S-8 (effective July 13, 1990) under the Securities Act of 1933, the
undersigned registrant hereby undertakes as follows, which undertaking shall
be incorporated by reference into registrant's Registration Statements on Form
S-8, Nos. 2-86486, 33-16285, 33-00167, 33-35731, 33-23480, 33-16284, and 33-
35730.
 
                                      62
<PAGE>
 
  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 Securities
Act of 1933 and is, therefore, unenforceable. In the event that a claim for
indemnification against such liabilities (other than the payment by the
registrant of expenses incurred or paid by a director, officer or controlling
person of the registrant in the successful defense of any action, suit or
proceeding) is asserted by such director, officer or controlling person in
connection with the securities being registered, the registrant will, unless
in the opinion of its counsel the matter has been settled by controlling
precedent, submit to a court of appropriate jurisdiction the question whether
such indemnification by it is against public policy as expressed in the Act
and will be governed by the final adjudication of such issue.
 
                                      63
<PAGE>
 
                                  SIGNATURES
 
  PURSUANT TO THE REQUIREMENTS OF SECTION 13 OR 15(D) OF THE SECURITIES
EXCHANGE ACT OF 1934, THE REGISTRANT HAS DULY CAUSED THIS REPORT TO BE SIGNED
ON ITS BEHALF BY THE UNDERSIGNED, THEREUNTO DULY AUTHORIZED.
 
                                          Centocor, Inc.
 
February 13, 1998
 
                                                   
                                          By:    /s/ David P. Holveck
                                              -------------------------------  
                                                     DAVID P. HOLVECK,
                                                  CHIEF EXECUTIVE OFFICER
 
  PURSUANT TO THE REQUIREMENTS OF THE SECURITIES EXCHANGE ACT OF 1934, THIS
REPORT HAS BEEN SIGNED BELOW BY THE FOLLOWING PERSONS ON BEHALF OF THE
REGISTRANT IN THE CAPACITIES AND ON THE DATES INDICATED.
 
              SIGNATURE                        TITLE                 DATE
              ---------                        -----                 ----

     /s/ Hubert J. P. Schoemaker       Director, Chairman     February 13, 1998
- -------------------------------------   of the Board                 
       HUBERT J. P. SCHOEMAKER
 
        /s/ David P. Holveck           Chief Executive        February 13, 1998
- -------------------------------------   Officer, and                 
          DAVID P. HOLVECK              Director (principal
                                        executive officer)
 
        /s/ Dominic J. Caruso          Senior Vice            February 13, 1998
- -------------------------------------   President and Chief          
          DOMINIC J. CARUSO             Financial Officer
                                        (principal
                                        financial and
                                        accounting officer)
 
        /s/ Anthony B. Evnin           Director               February 13, 1998
- -------------------------------------                                
          ANTHONY B. EVNIN
 
       /s/ William F. Hamilton         Director               February 13, 1998
- -------------------------------------                                
         WILLIAM F. HAMILTON
 
       /s/ Antonie T. Knoppers         Director               February 13, 1998
- -------------------------------------                                
         ANTONIE T. KNOPPERS
<PAGE>
 
              SIGNATURE                         TITLE                DATE
              ---------                        ------                ----  

      /s/ Ronald A. Matricaria          Director              February 13, 1998 
- -------------------------------------                                
        RONALD A. MATRICARIA
 
      /s/ Richard D. Spizzirri          Director              February 13, 1998
- -------------------------------------                               
        RICHARD D. SPIZZIRRI
 
        /s/ Lawrence Steinman           Director              February 13, 1998
- -------------------------------------                               
          LAWRENCE STEINMAN
 
         /s/ Jean C. Tempel             Director              February 13, 1998
- -------------------------------------                             
           JEAN C. TEMPEL
<PAGE>
 
                                                                     SCHEDULE II
 
                        CENTOCOR, INC. AND SUBSIDIARIES
 
                       VALUATION AND QUALIFYING ACCOUNTS
 
                  FOR THE THREE YEARS ENDED DECEMBER 31, 1997
                                 (IN THOUSANDS)
 
<TABLE>
<CAPTION>
                                    CHARGED                      CHARGED                      CHARGED
                           BALANCE  TO COSTS            BALANCE  TO COSTS            BALANCE  TO COSTS            BALANCE
                              AT      AND                  AT      AND                  AT      AND                  AT
 LASSIFICATIONC            12/31/94 EXPENSES DEDUCTIONS 12/31/95 EXPENSES DEDUCTIONS 12/31/96 EXPENSES DEDUCTIONS 12/31/97
- --------------             -------- -------- ---------- -------- -------- ---------- -------- -------- ---------- --------
 <S>                       <C>      <C>      <C>        <C>      <C>      <C>        <C>      <C>      <C>        <C>
 Inventory Reserves.......  $14,880   $2,094  ($15,938)   $1,036    $662     ($357)    $1,341   $8,484   ($5,317)   $4,508
</TABLE>
<PAGE>
 
                                 EXHIBIT INDEX
 
<TABLE>
<CAPTION>
 EXHIBIT
 NUMBER
 -------
 <C>     <S>
   3.16  By-laws of Centocor, Inc., as amended December 10, 1997
  10.34  Asset Purchase Agreement dated February 11, 1998 between Roche
         Healthcare Limited and Centocor, Inc. (The Registrant has requested
         confidential treatment from the Securities and Exchange Commission for
         portions of this Agreement.)
  11     Computation of Earnings Per Common Share
  12     Statement re: Computation of Ratios
  21     Subsidiaries of the Registrant
  23     Consent of Independent Auditors
  27     Financial Data Schedule
</TABLE>

<PAGE>
 
                                                                    EXHIBIT 3.16

                                CENTOCOR, INC.

                                    BYLAWS


                                   ARTICLE I

                                    OFFICES

          Section 1.1.  Registered Office.  The registered office of CENTOCOR,
                        -----------------                                     
INC. (the "Corporation") in the Commonwealth of Pennsylvania shall be as
specified in the Articles of Incorporation of the Corporation as they may from
time to time be amended (the "Articles") or at such other place as the Board of
Directors of the Corporation (the "Board") may specify in a statement of change
of registered office filed with the Department of State of the Commonwealth of
Pennsylvania.

          Section 1.2.  Other Offices.  The Corporation may also have an office
                        -------------                                          
or offices at such other place or places either within or without the
Commonwealth of Pennsylvania as the Board may from time to time determine or the
business of the Corporation requires.

                                  ARTICLE II
                         MEETINGS OF THE SHAREHOLDERS

          Section 2.1.  Place.  All meetings of the shareholders shall be held
                        -----                                                 
at the principal executive office of the Corporation or at such other places,
within or without the Commonwealth of Pennsylvania, as the Board may from time
to time
<PAGE>
 
determine.

          Section 2.2.  Annual Meeting.  A meeting of the shareholders for the
                        --------------                                        
election of directors and the transaction of such other business as may properly
be brought before the meeting shall be held once each calendar year on the
second Wednesday of April or, if that be a legal holiday, on the first day
thereafter that is not a legal holiday, or on such other date as the Board shall
determine.  If the annual meeting is not called and held within six months after
the designated time for such meeting, any shareholder may call the meeting at
any time after the expiration of such six-month period.

          Section 2.3.  Business to Be Conducted at the Annual Meeting.  At an
                        ----------------------------------------------        
annual meeting of the shareholders, only such business shall be conducted, and
only such proposals shall be acted upon, as shall have been brought before the
meeting (i) pursuant to the Corporation's notice of meeting, (ii) by or at the
direction of the Board or (iii) by any shareholder of the Corporation who is a
shareholder of record at the time of giving the notice provided for in these
Bylaws, who shall be entitled to vote at such meeting and who complies with the
notice procedures set forth in this Section.  For business to be properly
brought before an annual meeting by a shareholder, the shareholder must have
given timely notice thereof in writing to the Secretary of the Corporation.  To
be timely, a shareholder's notice must be delivered to or mailed to, postage
prepaid, and received at the principal executive offices of the Corporation not
less than 90 

                                      -2-
<PAGE>
 
days nor more than 120 days prior to the first anniversary of the preceding
year's annual meeting; provided, however, that in the event that the date of the
meeting is changed by more than 30 days from such anniversary date, notice by
the shareholder to be timely must be received no later than the close of
business on the 10th day following the earlier of the day on which notice of the
date of the meeting was mailed or public disclosure of the date was made. A
shareholder's notice to the Secretary shall set forth as to each matter the
shareholder proposes to bring before the meeting (1) a brief description of the
business desired to be brought before the meeting and the reasons for conducting
such business at the meeting, (2) a representation that the shareholder is a
holder of record of shares of the Corporation's capital stock entitled to vote
at such meeting and intends to appear in person or by proxy to bring such matter
before the meeting, (3) the name and address, as they appear on the
Corporation's books, of the shareholder proposing such business, and the name
and address of the beneficial owner, if any, on whose behalf the proposal is
made, (4) the class and number of shares of the Corporation which are owned
beneficially and of record by such shareholder of record and by the beneficial
owner, if any, on whose behalf the proposal is made, (5) any material interest
of such shareholder of record and the beneficial owner, if any, on whose behalf
the proposal is made in such business and (6) a description of all arrangements
and understandings between the shareholder of record and the beneficial owner,
if any, on

                                      -3-
<PAGE>
 
whose behalf the proposal is made and any other person or persons (naming such
person or persons) pursuant to which the proposal is to be made.

          Notwithstanding anything in these Bylaws to the contrary, no business
shall be conducted, and no proposal shall be acted upon, at an annual meeting
except in accordance with the procedures set forth in this Section.  The
presiding officer of the meeting shall, if the facts warrant, determine and
declare to the meeting that business or a proposal was not properly brought
before the meeting in accordance with the procedures prescribed by these Bylaws,
and if he should so determine, he shall so declare to the meeting and any such
business or proposal not properly brought before the meeting shall not be
transacted.  Notwithstanding the foregoing provisions of this Section, a
shareholder shall also comply with all applicable requirements of the Securities
Exchange Act of 1934, as amended (the "Exchange Act"), and the rules and
regulations thereunder with respect to the matters set forth in this Section.

          Section 2.4.  Written Ballot.  Unless required by a vote of the
                        --------------                                   
shareholders entitled to vote in the election of directors held before the
voting for the election of directors begins, elections of directors need not be
by ballot.

          Section 2.5.  Special Meetings.  Special meetings of the shareholders,
                        ----------------                                        
for any purpose or purposes, may be called at any time by the Chief Executive
Officer or by the Board, upon written request delivered to the Secretary of the
Corporation.  

                                      -4-
<PAGE>
 
The Board, by written request delivered to the Secretary of the Corporation,
shall call a special meeting of shareholders for the purpose of considering the
voting rights to be accorded to "control shares" if the "acquiring person" (as
such terms are defined in Section 2562 of the Pennsylvania Business Corporation
Law of 1988 as it may from time to time be amended (the "1988 BCL")) of such
shares complies with the requirements of Section 2565 of the 1988 BCL. In
addition, an "interested shareholder" (as defined in Section 2553 of the 1988
BCL) may, upon written request delivered to the Secretary of the Corporation,
call a special meeting for the purpose of approving a business combination under
either subsection (3) or (4) of Section 2555 of the 1988 BCL. Any request to the
Secretary of the Corporation for a special meeting of shareholders shall state
the purpose or purposes of the proposed meeting. Upon receipt of any such
request, it shall be the duty of the Secretary of the Corporation to give
notice, in a manner consistent with Section 2.7 of these Bylaws, of a special
meeting of the shareholders to be held at such time as the Secretary of the
Corporation may fix, which time may not be, if the meeting is called pursuant to
a statutory right, more than sixty (60) days, or such lesser time as may be
required by Section 2565 of the 1988 BCL, after receipt of the request. If the
Secretary of the Corporation shall neglect or refuse to fix the date of the
meeting and give notice thereof, the person or persons calling the meeting may
do so.

          Section 2.6.  Scope of Special Meetings.  Business 
                        -------------------------                             

                                      -5-
<PAGE>
 
transacted at any special meeting of shareholders shall be confined to the
business stated in the notice.

          Section 2.7.  Form of Notice.  Written notice of every meeting of the
                        --------------                                         
shareholders, stating the place, the date and hour thereof and the matters to be
acted on at such meeting, shall be given in a manner consistent with the
applicable provisions of Section 14 of the Exchange Act and the rules and
regulations thereunder by, or at the direction of, the Secretary of the
Corporation or, in the absence of the Secretary of the Corporation, any
Assistant Secretary of the Corporation, at least twenty (20) days prior to the
day designated for a meeting, to each shareholder entitled to vote thereat on
the date fixed as a record date in accordance with Section 7.l of these Bylaws
or, if no record date be fixed, then of record at the close of business on the
89th day next preceding the day of the meeting, at such address as appears on
the transfer books of the Corporation.  Each notice of a meeting of shareholders
shall state that, for purposes of any meeting that has been previously adjourned
for one or more periods aggregating at least fifteen (15) days because of an
absence of a quorum, the shareholders entitled to vote who attend such a
meeting, although less than a quorum pursuant to Section 2.8 of these Bylaws,
shall nevertheless constitute a quorum for the purpose of acting upon any matter
set forth in the original notice of the meeting that was so adjourned

          Section 2.8.  Quorum.  The shareholders present in person or by proxy,
                        ------                                                  
entitled to cast at least a majority of the 

                                      -6-
<PAGE>
 
votes that all shareholders are entitled to cast on any particular matter to be
acted upon at the meeting, shall constitute a quorum for the purposes of
consideration of, and action on, such matter. Shares of the Corporation owned by
it, directly or indirectly, shall not be counted in determining the total number
of outstanding shares for quorum purposes. The shareholders present in person or
by proxy and entitled to vote at a duly organized meeting can continue to do
business until the adjournment thereof notwithstanding the withdrawal of enough
shareholders to leave less than a quorum. If a meeting cannot be organized
because a quorum has not attended, the shareholders present in person or by
proxy may, except as otherwise provided by the 1988 BCL and subject to the
provisions of Section 2.9 of these Bylaws, adjourn the meeting to such time and
place as they may determine.

          Section 2.9.  Adjournment.  Any meeting of the share holders,
                        -----------                                    
including one at which directors are to be elected, may be adjourned for such
period as the shareholders present in person or by proxy and entitled to vote
shall direct.  Other than as provided in the last sentence of Section 2.7 of
these Bylaws, notice of the adjourned meeting or the business to be transacted
thereat need not be given, other than announcement at the meeting at which
adjournment is taken, unless the Board fixes a new record date for the adjourned
meeting.  At any adjourned meeting at which a quorum is present, any business
may be transacted that might have been transacted at the meeting as originally
noticed.

                                      -7-
<PAGE>
 
          Unless otherwise provided in a bylaw adopted by the shareholders,
those shareholders entitled to vote present in person or by proxy, although less
than a quorum pursuant to Section 2.8 of these Bylaws, shall nevertheless
constitute a quorum for the purpose of (i) electing directors at a meeting
called for the election of directors that has been previously adjourned for lack
of a quorum, and (ii) acting, at a meeting that has been adjourned for one or
more periods aggregating at least fifteen (15) days because of an absence of a
quorum, upon any matter set forth in the original notice of such adjourned
meeting, provided that such original notice shall have complied with the last
sentence of Section 2.7 of these Bylaws.

          Section 2.10.  Majority Voting.  Except as provided in Section 2.11 of
                         ---------------                                        
these Bylaws with respect to the election of directors, any matter brought
before a duly organized meeting for a vote of the shareholders shall be decided
by a majority of the votes cast at such meeting by the shareholders present in
person or by proxy and entitled to vote thereon, unless the matter is one for
which a different vote is required by express provision of the 1988 BCL, the
Articles or a bylaw adopted by the shareholders, in any of which case(s) such
express provision shall govern and control the decision on such matter.  Any
provision in these Bylaws requiring a vote other than a majority of the votes
cast for the taking of any action by the shareholders shall not be amended or
repealed by any lesser number or percentage of votes.

                                      -8-
<PAGE>
 
          Section 2.11.  Voting Rights.  Except as otherwise provided in the
                         -------------                      
Articles or in the next paragraph of this Section 2.11, at every meeting of the
shareholders, every shareholder entitled to vote shall have the right to one
vote for each share having voting power standing in his or her name on the books
of the Corporation. Shares of the Corporation owned by it, directly or
indirectly, shall not be voted.

          In each election of directors, every shareholder entitled to vote
shall have the right to multiply the number of votes to which such shareholder
is entitled by the number of directors to be elected in the same election by the
holders of the class or classes of shares of which such shareholder's shares are
a part, and may cast all of the votes so accumulated for one candidate or may
distribute them among any two or more candidates.  The candidates receiving the
highest number of votes from each class or group of classes, if any, entitled to
elect directors separately up to the number of directors to be elected by the
class or group of classes shall be elected.

          Section 2.12.  Proxies.  Every shareholder entitled to vote at a
                         -------                                          
meeting of the shareholders may authorize another person to act for him or her
by proxy.  The presence of, or vote or other action at a meeting of
shareholders, by a proxy of a shareholder, shall constitute the presence of, or
vote or action by, the shareholder.  Every proxy shall be executed in writing by
the shareholder or by the shareholder's duly authorized attorney in fact and
filed with the Secretary of the Corporation.  A 

                                      -9-
<PAGE>
 
proxy, unless coupled with an interest, shall be revocable at will,
notwithstanding any other agreement or any provision in the proxy to the
contrary, but the revocation of a proxy shall not be effective until written
notice of revocation has been given to the Secretary of the Corporation. No
unrevoked proxy shall be valid after three (3) years from the date of its
execution, unless a longer time is expressly provided therein. A proxy shall not
be revoked by the death or incapacity of the maker unless, before the vote is
counted, written notice of such death or incapacity is given to the Secretary of
the Corporation.

          Section 2.13.  Voting Lists.  The officer or agent having charge of
                         ------------                                        
the transfer books for securities of the Corporation shall make a complete list
of the shareholders entitled to vote at a meeting of the shareholders, arranged
in alphabetical order, with the address of and the number of shares held by each
shareholder.  The list shall be produced and kept open at the time and place of
the meeting and shall be subject to the inspection of any shareholder during the
whole time of the meeting.  If the Corporation has five thousand (5000) or more
shareholders, it may make such information available at the meeting of
shareholders by any other means.

          Section 2.14.  Judges of Election.  In advance of any meeting of the
                         ------------------                                   
shareholders, the Board may appoint judges of election, who need not be
shareholders, to act at such meeting or any adjournment thereof.  If judges of
election are not so appointed, the presiding officer of any such meeting may,
and on 

                                      -10-
<PAGE>
 
the request of any shareholder shall, appoint judges of election at the meeting.
The number of judges shall be one or three, as determined by the Board to be
appropriate under the circumstances. No person who is a candidate for any office
to be filled at the meeting shall act as a judge at the meeting. The judges of
election shall do all such acts as may be proper to conduct the election or vote
with fairness to all shareholders, and shall make a written report of any matter
determined by them and execute a certificate of any fact found by them, if
requested by the presiding officer of the meeting or any shareholder or the
proxy of any shareholder. If there are three judges of election, the decision,
act or certificate of a majority shall be effective in all respects as the
decision, act or certificate of all.

          Section 2.15.  Participation by Conference Call.  No shareholder may
                         --------------------------------                     
participate in any meeting of shareholders by means of conference telephone or
similar communications equipment.

                                  ARTICLE III
                                   DIRECTORS

          Section 3.1.  Number and Qualifications.  The business and affairs of
                        -------------------------                              
the Corporation shall be managed by the Board, which shall consist of no more
than eleven (11) nor fewer then five (5) members as determined from time to time
by the Board.  Directors shall be natural persons of full age and need not be
residents of the Commonwealth of Pennsylvania or shareholders of 

                                      -11-
<PAGE>
 
the Corporation.

          Section 3.2.  Election and Term of Office.  Except as provided in
                        ---------------------------                        
Section 3.4 of these Bylaws in the case of vacancies, each director shall be
elected by the shareholders to serve a term of one year and until a successor is
selected and qualified or until the director's earlier death, resignation or
removal.

          Section 3.3.  Nominations of Directors.  Subject to the rights of
                        ------------------------                           
holders of any series of preferred stock or any other class of capital stock of
the Corporation (other than Common Stock) then outstanding, only persons who are
nominated in accordance with the procedures set forth in this Section shall be
eligible to serve as directors.  Nominations of persons for election to the
Board of the Corporation may be made at a meeting of shareholders, (i) by or at
the direction of the Board, (ii) by or at the direction of a committee of the
Board to which the Board has delegated the authority to make such nominations
("Nominating Committee") or (iii) by any shareholder of the Corporation who is a
shareholder of record at the time of giving of notice provided for in this
Section, who shall be entitled to vote for the election of directors at the
meeting and who complies with the procedures set forth in this Section.  The
Board or the Nominating Committee, as the case may be, will consider written
recommendations from shareholders for nominees for election to the Board,
provided any such recommendation, together with (i) the information set forth in
the next paragraph in this Section regarding each proposed nominee, the
shareholder 

                                      -12-
<PAGE>
 
recommending each proposed nominee and any beneficial owner of shares on whose
behalf a nomination is made, and (ii) the consent of each nominee to serve as a
director of the Corporation if so elected, is received by the Secretary of the
Corporation, in the case of an annual meeting of shareholders, not later than
the date specified in the most recent proxy statement of the Corporation as the
date by which shareholder proposals for consideration at the next annual meeting
of shareholders must be received (provided, however, that in the event the date
of the annual meeting is changed by more than 30 days from the date contemplated
at the time of the previous year's proxy statement, notice by the shareholder
must be received not later than the close of business on the 10th day following
the earlier of the day on which notice of the date of the meeting was mailed or
public disclosure of the date was made), and, in the case of a special meeting
of shareholders, not later than the close of business on the 10th day following
the earlier of the day on which notice of the date of the meeting was mailed or
public disclosure of the date was made. If the Board or Nominating Committee, as
the case may be, accepts any such recommendation, the nomination shall be made
by or at the direction of the Board or the Nominating Committee.

          Nominations by shareholders, other than those made by or at the
direction of the Board or the Nominating Committee, shall be made pursuant to
timely notice in writing to the Secretary of the Corporation.  To be timely, a
shareholder's 

                                      -13-
<PAGE>
 
notice shall be delivered to or mailed to, postage prepaid, and received at the
principal executive offices of the Corporation (a) in the case of an annual
meeting of shareholders, not less than 90 days or more than 120 days prior to
the first anniversary of the preceding year's annual meeting (provided, however,
that in the event that the date of the annual meeting is changed by more than 30
days from such anniversary date, notice by the shareholder to be timely must be
so received not later than the close of business on the 10th day following the
earlier of the day on which notice of the date of the meeting was mailed or
public disclosure of the date was made), and (b) in the case of a special
meeting at which directors are to be elected, not later than the close of
business on the 10th day following the earlier of the day on which notice of the
date of the meeting was mailed or public disclosure of the date was made. Such
shareholder's notice shall set forth (1) as to each person whom the shareholder
proposes to nominate for election as a director, (A) all information relating to
such proposed nominee that is required to be disclosed in solicitations of
proxies for election of directors pursuant to Regulation 14A under the Exchange
Act and (B) the written consent of the proposed nominee to serve as a director
of the Corporation if so elected; (2) as to the shareholder giving the notice
(A) the name and address, as they appear on the Corporation's books, of such
shareholder, (B) a representation that the shareholder is a holder of record of
shares of the Corporation's capital stock entitled to vote at 

                                      -14-
<PAGE>
 
such meeting and intends to appear in person or by proxy at the meeting to
nominate the proposed nominee or nominees specified in the notice and (C) the
class and number of shares of the Corporation which are beneficially owned by
such shareholder and also which are owned of record by such shareholder; and (3)
as to the beneficial owner, if any, on whose behalf the nomination is made, (A)
the name and address of such person and (B) the class and number of shares of
the Corporation which are beneficially owned by such person. The Corporation may
require any proposed nominee to furnish such other information as may reasonably
be required by the Corporation to determine the eligibility of such proposed
nominee to serve as a director of the Corporation.

          No person shall be eligible to serve as a director of the Corporation
unless nominated in accordance with the procedures set forth in this Section.
The presiding officer of the meeting shall, if the facts warrant, determine and
declare to the meeting that a nomination was not made in accordance with the
procedures prescribed by this Section, and if he should so determine, he shall
so declare to the meeting and the defective nomination shall be disregarded.
Notwithstanding the foregoing provisions of this Section, a shareholder shall
also comply with all applicable requirements of the Exchange Act and the rules
and regulations thereunder with respect to the matters set forth in this
Section.

          Section 3.4.  Vacancies.  Vacancies in the Board, including vacancies
                        ---------                                              
resulting from an increase in the number of 

                                      -15-
<PAGE>
 
directors, shall be filled by a majority vote of the remaining members of the
Board, even though less than a quorum, or by a sole remaining director. Each
director elected to fill a vacancy shall serve until the next annual meeting of
shareholders and until his successor is elected and qualified. If one or more
directors resign from the Board effective at a future date, the directors then
in office, including those who have resigned, shall have the power to fill the
vacancies by a majority vote, the vote thereon to take effect when the
resignations become effective.

          Section 3.5.  Place of Board Meetings.  Meetings of the Board may be
                        -----------------------                               
held at such places within or without the Commonwealth of Pennsylvania as the
Board may from time to time appoint or as may be designated in the notice of the
meeting.

          Section 3.6.  First Meeting of Newly Elected Board.  The first meeting
                        ------------------------------------                    
of each newly elected Board may be held at the same place and as soon as
practicable after the meeting at which such directors were elected and no notice
shall be required other than announcement at such meeting. If such first meeting
of the newly elected Board is not so held, notice of such meeting shall be given
in the same manner as set forth in Section 3.8 of these Bylaws with respect to
notice of regular meetings of the Board.

          Section 3.7.  Chairman of the Board.  At the first meeting of the
                        ---------------------                              
newly elected Board, the Board shall elect one of its members to serve as
Chairman at the pleasure of the Board.  The Chairman of the Board shall preside
at all meetings of the 

                                      -16-
<PAGE>
 
shareholders and of the Board and shall, in general, perform all other duties
incident to the office of the Chairman. He or she shall perform such other
duties and have such other powers as the Board may from time to time prescribe.

          Section 3.8.  Regular Board Meetings; Notice.  Regular meetings of the
                        ------------------------------                          
Board may be held at such times and places as shall be determined from time to
time by resolution of at least a majority of the whole Board at a duly convened
meeting, or by unanimous written consent.  Notice of each regular meeting of the
Board shall specify the purpose, date, place and hour of the meeting and shall
be given to each director, not later than the second day immediately preceding
the day of such meeting in the case of notice by mail, telegram or courier
service, and not later than the day immediately preceding the day of such
meeting in the case of notice delivered personally or by telephone, telex TWX or
facsimile transmission.  Notice shall be given in a manner consistent with
Section 11.4 of these Bylaws.

          Section  3.9.  Special Board Meetings; Notice.  Special meetings of
                         ------------------------------                      
the Board may be called by the Chairman or the Chief Executive Officer on notice
to each director, specifying the purpose, date, place and hour of the meeting
and given within the same time and in the same manner provided for notice of
regular meetings of the Board in Section 3.8 of these Bylaws.  Special meetings
of the Board shall be called by the Secretary of the Corporation in like manner
and on like notice on the written request of a majority of directors.

                                      -17-
<PAGE>
 
          Section 3.10.  Quorum of the Board.  At all meetings of the Board, the
                         -------------------                     
presence of a majority of the directors in office shall constitute a quorum for
the transaction of business, and the acts of a majority of the directors present
and voting at a meeting at which a quorum is present shall be the acts of the
Board.

          Section 3.11.  Committees of Directors.
                         ----------------------- 

          (a)  The Board may, by resolution adopted by a majority of the
directors in office, establish one or more committees, each committee to consist
of one or more of the directors, and may designate one or more directors as
alternate members of any committee, who may replace any absent or disqualified
member at any meeting of the committee or for the purposes of any written action
by the committee.  Any such committee, to the extent provided in such resolution
of the Board or in these Bylaws, shall have and may exercise all of the powers
and authority of the Board; provided, however, that no such committee shall have
any power or authority to (i) submit to the shareholders any action requiring
approval of the shareholders under the 1988 BCL, (ii) create or fill vacancies
on the Board, (iii) amend or repeal these Bylaws or adopt new Bylaws, (iv) amend
or repeal any resolution of the Board that by its terms is amendable or
repealable only by the Board, (v) act on any matter committed by these Bylaws or
by resolution of the Board to another committee of the Board, (vi) amend the
Articles or adopt a resolution proposing an amendment to the Articles, or (vii)

                                      -18-
<PAGE>
 
adopt a plan or an agreement of merger or consolidation. In the absence or
disqualification of a member or alternate member or members of a committee, the
member or members thereof present at any meeting and not disqualified from
voting, whether or not a quorum is present, may unanimously appoint another
director to act at the meeting in the place of any absent or disqualified
member.

          (b)  A majority of the directors appointed to a committee shall
constitute a quorum for the transaction of business, and the acts of a majority
of the directors appointed to a committee present at a meeting of the committee
at which a quorum is present shall be the acts of the committee.

          (c)  A committee may, by resolution, fix regular meeting dates of
which no notice need be given to the members of the committee.  Special meetings
of a committee may be held at the call of the chairman of the committee upon
such notice as is provided in Section 3.8 of these Bylaws for meetings of the
Board of Directors.

          (d)  Minutes of all meetings of any committee of the Board shall be
kept by the person designated by such committee to keep such minutes.  Copies of
such minutes and any writing setting forth an action taken by written consent
without a meeting shall be distributed to each member of the Board promptly
after such meeting is held or such action is taken.  Each committee of the of
the Board shall serve at the pleasure of the Board.

                                      -19-
<PAGE>
 
          Section 3.12.  Participation in Board Meetings by Telephone.  One or
                         --------------------------------------------
more directors may participate in a meeting of the Board or of a committee of
the Board by means of conference telephone or similar communications equipment
by means of which all persons participating in the meeting can hear each other,
and all directors so participating shall be deemed present at the meeting.

          Section 3.13.  Action by Consent of Directors.  Any action required or
                         ------------------------------                         
permitted to be taken at a meeting of the Board or of a committee of the Board
may be taken without a meeting if, prior or subsequent to the action, a consent
or consents in writing setting forth the action so taken shall be signed by all
of the directors in office or all of the members of the committee, as the case
may be, and filed with the Secretary of the Corporation.

          Section 3.14.  Compensation of Directors.  Directors may be reimbursed
                         -------------------------                              
for their expenses in attending Board and committee meetings.  The Board may, by
resolution, fix the compensation of directors for their services as directors.
A director may also serve the Corporation in any other capacity and receive
compensation therefor.

          Section 3.15.  Liability of Directors.  A director of the Corporation
                         ----------------------                                
shall not be personally liable for monetary damages for any action taken, or any
failure to take any action, on or after January 27, 1987 unless he has breached
or failed to perform the duties of his office as provided for under Section 

                                      -20-
<PAGE>
 
1712 of the 1988 BCL and the breach or failure to perform constitutes self
dealing, willful misconduct or recklessness. Any repeal, amendment, or
modification of this Paragraph shall be prospective only and shall not increase,
but may decrease, the liability of a director with respect to actions or
failures to act occurring prior to such change.

          Section 3.16.  Inapplicability of Section 3.15.  The limitation on a
                         -------------------------------                      
director's liability provided by Section 3.15 of those Bylaws shall not apply to
any liability pursuant to any criminal statute or for the payment of taxes
pursuant to local, state or federal law.

                                  ARTICLE IV
                                   OFFICERS

          Section 4.1.   Number.  The officers of the Corporation shall be a
                         ------                                             
Chief Executive Officer, a President, a Secretary and a Treasurer and in
addition may include one or more Vice Presidents and such other officers and
assistant officers as the Board may elect.  Any two or more offices may be held
by the same person.  None of the officers need be a member of the Board.

          Section 4.2.   Election; Term of Office.  The officers and assistant
                         ------------------------                             
officers shall be elected by the Board at its annual meeting, and shall hold
office until their successors are elected and qualified or until their death,
resignation or removal by the Board.  Vacancies in any office shall be filled by
the Board.  Any officer or agent may be removed by the Board with 

                                      -21-
<PAGE>
 
or without cause, but such removal shall be without prejudice to the contract
rights, if any, of the person so removed. The election or appointment of an
officer or agent shall not of itself create any contract rights.

          Section 4.3.   Compensation.  The compensation of all officers of the
                         ------------                                          
Corporation shall be fixed by the Board.

          Section 4.4.   Chief Executive Officer.  The Chief Executive Officer
                         -----------------------                              
shall have such responsibilities and authority as are normally held by the chief
executive officer of a corporation and shall see that all orders and resolutions
of the Board are carried out.  Subject to the direction of the Board, he or she
shall provide leadership in determining the strategic direction, annual budgets
and organizational alignment of the Corporation, with the objective of building
shareholder value.  He or she shall have the final decisional authority with
respect to all regulation filings.  He or she shall also insure that the
Corporation's Code of Legal and Ethical Conduct is implemented and observed.
The Chief Executive Officer is authorized to sign all contracts and other
documents of the Corporation.  In the absence or disability of the Chairman of
the Board, he or she shall preside at all meetings of the shareholders and of
the Board and shall otherwise perform the duties and exercise the powers of the
Chairman.

          Section 4.5.   President.  The President shall be the chief operating
                         ---------                                             
officer of the Corporation.  He or she will report to the Chief Executive
Officer and shall perform such 

                                      -22-
<PAGE>
 
duties and have such other powers as the Board and the Chief Executive shall
from time to time prescribe. In the event the Chief Executive Officer shall be
disabled, the President shall serve as the Acting Chief Executive Officer and
during the period of the Chief Executive Officer's disability, the President
shall perform the duties and exercise the powers of the Chief Executive Officer.

          Section 4.6.   Vice Presidents.  The Board may elect one or more
                         ---------------                                  
persons to serve as Executive Vice Presidents, Senior Vice Presidents or Vice
Presidents and each shall perform such duties and have such other powers as the
Board may from time to time prescribe or the Chief Executive Officer may
delegate. One of the Executive Vice Presidents, Senior Vice Presidents or Vice
Presidents shall be the Chief Financial Officer of the Corporation. He or she
shall have charge and custody of, and be responsible for, the books and records
of the corporation. He or she shall render to the Chief Executive Officer and
the Board, upon request, an account of the financial condition and results of
operations of the Corporation.

          Section 4.7.   Secretary.  The Secretary shall be custodian of the
                         ---------                                          
books and records of the Corporation other than those in the custody of the
Chief Financial Officer or the Treasurer.  The Secretary shall be custodian of
the corporate seal and is authorized to affix the seal to all documents, the
execution and delivery of which are duly authorized.  The Secretary shall record
the minutes of all meetings of 

                                      -23-
<PAGE>
 
shareholders and of the Board and shall be responsible for the giving of all
notices of such meetings in accordance with these Bylaws. The Secretary shall,
in general, perform such other duties as are incident to the office of Secretary
and as may be assigned to the Secretary by the Board or by the Chief Executive
Officer.

          Section 4.8.   Treasurer.  The Treasurer shall have charge and custody
                         ---------                                              
of, and be responsible for, all funds of the Corporation and the investment
thereof and shall deposit all such funds in the name of the Corporation in
depositories selected by the Board and shall perform such other duties as are
incident to the office of Treasurer and as may be assigned to him by the Board,
by the Chief Executive Officer or by the Chief Financial Officer.  He or she
shall report to the Chief Financial Officer.  In the event of the disability of
the Chief Financial Officer, the Treasurer shall serve as the Acting Chief
Financial Officer of the Corporation and during the period of the Chief
Financial Officer's disability, he or she shall perform the duties and exercise
the powers of the Chief Financial Officer.

          Section 4.9.   Bonds.  If required by the Board, any officer shall
                         -----
give the Corporation a bond in such sum, and with such surety or sureties as may
be satisfactory to the Board, for the faithful discharge of the duties of his or
her office and for the restoration to the Corporation, in the case of his or her
death, resignation, retirement or removal from office, of all books, papers,
vouchers, money and other property of whatever

                                      -24-
<PAGE>
 
kind in his or her possession or under his or her control belonging to the
Corporation.

                                   ARTICLE V
                            CERTIFICATES FOR SHARES

          Section 5.1.   Share Certificates.  The certificates representing
                         ------------------                                
shares of the Corporation shall be numbered and registered in a share register
as they are issued.  The share register shall exhibit the names and addresses of
all registered holders and the number and class of shares and the series, if
any, held by each.

          Each share certificate shall state that the Corporation is
incorporated under the laws of the Commonwealth of Pennsylvania, the name of the
registered holder and the number and class of shares and the series, if any,
represented thereby.  If, under its Articles, the Corporation is authorized to
issue shares of more than one class or series, each share certificate shall set
forth, or shall contain a statement that the Corporation will furnish to any
shareholder upon request and without charge, a full or summary statement of the
designations, voting rights, preferences, limitations and special rights of the
shares of each class or series authorized to be issued so far as they have been
fixed and determined and the authority of the Board to fix and determine such
rights.

          Section 5.2.   Execution of Certificates.  Every share certificate
                         -------------------------                          
shall be executed, by facsimile or otherwise, by or 

                                      -25-
<PAGE>
 
on behalf of the Corporation, by the Chairman, by the Chief Executive Officer,
by the President, by any Vice-President, or by the Secretary. In case any
officer who has signed or whose facsimile signature has been placed upon any
share certificate shall have ceased to be such officer, because of death,
resignation or otherwise, before the share certificate is issued, it may be
issued by the Corporation with the same effect as if the officer had not ceased
to be such at the time of issue.

                                  ARTICLE VI
                              TRANSFER OF SHARES

          Section 6.l.  Transfer; Duty of Inquiry.  Upon presentment to the
                        -------------------------
Corporation or its transfer agent of a share certificate endorsed by the
appropriate person or accompanied by proper evidence of succession, assignment
or authority to transfer, a new certificate shall be issued to the person
entitled thereto and the old certificate cancelled and the transfer registered
upon the books of the Corporation, unless the Corporation or its transfer agent
has a duty to inquire as to adverse claims with respect to such transfer, which
duty has not been discharged. The Corporation shall have no duty to inquire into
adverse claims with respect to transfers of its securities or the rightfulness
thereof unless (a) the Corporation has received written notification of an
adverse claim at a time and in a manner which affords the Corporation a
reasonable opportunity to act on it before the issuance of a new, reissued

                                      -26-
<PAGE>
 
or re-registered share certificate and the notification identifies the claimant,
the registered owner and the issue of which the share or shares are a part and
provides an address for communications directed to the claimant; or (b) the
Corporation has required and obtained, with respect to a fiduciary, a copy of a
will, trust, indenture, articles of co-partnership, bylaws or other controlling
instruments, for a purpose other than to obtain appropriate evidence of the
appointment or incumbency of the fiduciary, and such documents indicate, upon
reasonable inspection, the existence of an adverse claim.

          Section 6.2.   Discharging Duty of Inquiry.  The Corporation may
                         ---------------------------                      
discharge any duty of inquiry by any reasonable means, including notifying an
adverse claimant by registered or certified mail at the address furnished by the
claimant or, if there is no such address, at the claimant's residence or regular
place of business, that the security has been presented for registration of
transfer by a named person, and that the transfer will be registered unless
within thirty (30) days from the date of mailing the notification, either (a) an
appropriate restraining order, injunction or other process issues from a court
of competent jurisdiction or (b) an indemnity bond, sufficient in the
Corporation's judgment to protect the Corporation and any transfer agent,
registrar or other agent of the Corporation involved from any loss which it or
they may suffer by complying with the adverse claim, is filed with the
Corporation.

                                      -27-
<PAGE>
 
                                  ARTICLE VII
                     RECORD DATE; IDENTITY OF SHAREHOLDERS

          Section 7.1.   Record Date.  The Board may fix a time, prior to the
                         -----------                                         
date of any meeting of the shareholders, as a record date for the determination
of the shareholders entitled to notice of, or to vote at, the meeting, which
time, except in the case of an adjourned meeting, shall not be more than ninety
(90) days prior to the date of the meeting.  Except as otherwise provided in
Section 7.2 of these Bylaws, only the shareholders of record at the close of
business on the date so fixed shall be entitled to notice of, or to vote at,
such meeting, notwithstanding any transfer of securities on the books of the
Corporation after any record date so fixed.  The Board may similarly fix a
record date for the determination of shareholders for any other purpose.  When a
determination of shareholders of record has been made as herein provided for
purposes of a meeting, the determination shall apply to any adjournment thereof
unless the Board fixes a new record date for the adjourned meeting.

          Section 7.2.   Certification of Nominee.  The Board may adopt a
                         ------------------------                        
procedure whereby a shareholder may certify in writing to the Secretary of the
Corporation that all or a portion of the shares registered in the name of the
shareholder are held for the account of a specified person or persons.  The
Board, in adopting such procedure, may specify (i) the classification of
shareholder who may certify, (ii) the purpose or purposes for which the
certification may be made, (iii) the form of certification and

                                      -28-
<PAGE>
 
the information to be contained therein, (iv) as to certifications with respect
to a record date, the date after the record date by which the certification must
be received by the Secretary of the Corporation, and (v) such other provisions
with respect to the procedure as the Board deems necessary or desirable.  Upon
receipt by the Secretary of the Corporation of a certification complying with
the procedure, the persons specified in the certification shall be deemed, for
the purpose or purposes set forth in the certification, to be the holders of
record of the number of shares specified instead of the persons making the
certification.

                                 ARTICLE VIII
                            REGISTERED SHAREHOLDERS

          Section 8.1.   Registered Shareholders.  Before due presentment for
                         -----------------------                             
transfer of any shares, the Corporation shall treat the registered owner thereof
as the person exclusively entitled to vote, to receive notifications and
otherwise to exercise all the rights and powers of an owner, and shall not be
bound to recognize any equitable or other claim or interest in such securities,
whether or not it shall have express or other notice thereof, except as
otherwise provided by the laws of the Commonwealth of Pennsylvania or Section
7.2 of these Bylaws.

                                  ARTICLE IX
                               LOST CERTIFICATES

          Section 9.1.   Lost Certificates.  If the owner of a
                         -----------------
                          
                                     -29-
<PAGE>
 
share certificate claims that it has been lost, destroyed, or wrongfully taken,
the Corporation shall issue a new certificate in place of the original
certificate if the owner so requests before the Corporation has notice that the
certificate has been acquired by a bona fide purchaser, and if the owner has
filed with the Corporation an indemnity bond and an affidavit of the facts
satisfactory to the Board or its designated agent, and has complied with such
other reasonable requirements, if any, as the Board may deem appropriate.

                                   ARTICLE X
                                 DISTRIBUTIONS
          Section 10.1.  Distributions.  Distributions upon the shares of the
                         -------------
Corporation, whether by dividend, purchase or redemption or other acquisition of
its shares, subject to any provisions of the Articles related thereto, may be
authorized by the Board at any regular or special meeting of the Board and may
be paid directly or indirectly in cash, in property or by the incurrence of
indebtedness by the Corporation.

          Section 10.2.  Reserves.  Before the making of any distributions,
                         --------                                          
there may be set aside out of any funds of the Corporation available for
distributions such sum or sums as the Board from time to time, in its absolute
discretion, deems proper as a reserve fund to meet contingencies, or for
equalizing dividends, or for repairing or maintaining any property of the
Corporation, or for such other purpose as the Board shall deem

                                      -30-
<PAGE>
 
conducive to the interests of the Corporation, and the Board may abolish any
such reserve in the manner in which it was created.

          Section 10.3.  Stock Dividends/Splits.  Stock dividends or splits or
                         ----------------------                               
reverse stock splits upon the shares of the Corporation, subject to any
provisions of the Articles related thereto, may be authorized by the Board at
any regular or special meeting of the Board.

                                  ARTICLE XI
                              GENERAL PROVISIONS
          Section 11.1.  Checks and Notes.  All checks or demands for money and
                         ---------------- 
notes of the Corporation shall be signed by such officer or officers as the
Board may from time to time designate.

          Section 11.2.  Fiscal Year.  The fiscal year of the Corporation shall
                         -----------
be as determined by the Board.

          Section 11.3.  Seal.  The corporate seal shall have inscribed thereon
                         ----                                                  
the name of the Corporation, the year of its organization and the words
"Corporate Seal, Pennsylvania." Such seal may be used by causing it or a
facsimile thereof to be impressed or affixed or in any manner reproduced.  The
affixation of the corporate seal shall not be necessary to the valid execution,
assignment or endorsement of any instrument or other document by the
Corporation.

          Section 11.4.  Notices.  Except as provided in Section 2.7 of these
                         -------
Bylaws, whenever, under the provisions of the 1988

                                      -31-
<PAGE>
 
BCL or of the Articles or of these Bylaws or otherwise, written notice is
required to be given to any person, it may be given to such person either
personally or by sending a copy thereof by first class or express mail, postage
prepaid, telegram (with messenger service specified), telex, TWX (with
answerback received), courier service (with charges prepaid) or facsimile
transmission to his or her address, (or to his or her telex, TWX or facsimile
number), appearing on the books of the Corporation or, in the case of directors,
supplied by the director to the Corporation for the purpose of notice.  If the
notice is sent by mail, telegraph or courier service, it shall be deemed to have
been given to the person entitled thereto when deposited in the United States
mail or with a telegraph office or courier service for delivery to that person.
A notice given by telex or TWX or facsimile shall be deemed to have been given
when dispatched.

          Section 11.5.  Waiver of Notice.  Whenever any notice is required to
                         ----------------                                     
be given by the 1988 BCL or by the Articles or these Bylaws, a waiver thereof in
writing, signed by the person or persons entitled to the notice, whether before
or after the time stated therein, shall be deemed equivalent to the giving of
such notice.  Neither the business to be transacted at, nor the purpose of, the
meeting need be specified in the waiver of notice of the meeting.  Attendance of
a person at any meeting shall constitute a waiver of notice of the meeting,
except where any person attends a meeting for the express purpose of objecting
to the transaction of any business because the meeting was not

                                      -32-
<PAGE>
 
lawfully called or convened, and the person so objects at the beginning of the
meeting.

                                  ARTICLE XII
                                  AMENDMENTS

          Section 12.1.  Amendments.  These Bylaws may be amended or repealed,
                         ----------                                           
and new bylaws adopted, by the shareholders at any regular or special meeting
duly convened or, except for a bylaw on a subject expressly committed to the
shareholders by the 1988 BCL, by the Board at any regular or special meeting
duly convened, subject always to the power of the shareholders to change such
action by the Board. In the case of a meeting of shareholders, written notice
shall be given to each shareholder that the purpose, or one of the purposes, of
the meeting is to consider the amendment or repeal of these Bylaws or the
adoption of new Bylaws. There shall be included in, or enclosed with the notice,
a copy of the proposed amendment or a summary of the changes to be effected
thereby. Any change in the Bylaws shall take effect when adopted unless
otherwise provided in the resolution effecting the change.

                                 ARTICLE XIII
                                INDEMNIFICATION

          Section 13.1.  Officers and Directors - Direct Actions.  The
                         ---------------------------------------      
Corporation shall indemnify, to the extent permitted under these Bylaws, any
person who was or is a party (other than a party plaintiff suing on his or her
own behalf), or who is

                                      -33-
<PAGE>
 
threatened to be made such 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)
arising out of, or in connection with, any actual or alleged act or omission or
by reason of the fact that he or she is or was a director or officer of the
Corporation, or is or was serving at the request of the Corporation as a
director, officer, employee or agent of another domestic or foreign corporation
for profit or not-for-profit, partnership, joint venture, trust or other
enterprise, against expenses (including attorneys' fees), judgments, fines and
amounts paid in settlement actually and reasonably incurred by him or her in
connection with such action, suit or proceeding if he or she met the standard of
conduct of (i) acting in good faith and in a manner he or she reasonably
believed to be in, or not opposed to, the best interests of the Corporation and,
(ii) with respect to any criminal proceeding, having no reasonable cause to
believe his or her conduct was unlawful.  The termination of any action or
proceeding by judgment, order, settlement or conviction or upon a plea of nolo
contendere or its equivalent shall not of itself create a presumption that the
person did not act in good faith and in a manner that he or she reasonably
believed to be in, or not opposed to, the best interests of the Corporation and,
with respect to any criminal proceeding, had reasonable cause to believe that
his or her conduct was unlawful.

          Section 13.2.  Officers and Directions - Derivative
                         ------------------------------------

                                      -34-
<PAGE>
 
Actions.  The Corporation shall indemnify, to the extent permitted under these
- -------                                                                       
Bylaws, any person who was or is a party (other than a party suing in the right
of the Corporation), or is threatened to be made a party, to any threatened,
pending or completed action by or in the right of the Corporation to procure a
judgment in its favor by reason of the fact that he or she is or was a director
or officer of the Corporation, or is or was serving at the request of the
Corporation as a director, officer, employee or agent of another domestic or
foreign corporation for profit or not-for-profit, partnership, joint venture,
trust or other enterprise against expenses (including attorneys' fees) and
amounts paid in settlement without any admission of liability actually and
reasonably incurred by him or her in connection with the defense or settlement
of the action if he or she met the standard of conduct of acting in good faith
and in a manner he or she reasonably believed to be in, or not opposed to, the
best interests of the Corporation.  Indemnification shall not be made under this
Section 13.2 in respect of any claim, issue or matter as to which the person has
been adjudged to be liable to the Corporation unless and only to the extent that
the Court of Common Pleas of the judicial district embracing the county in which
the registered office of the Corporation is located or the court in which the
action was brought determines upon application that, despite the adjudication of
liability but in view of all the circumstances of the case, such person is
fairly and reasonably entitled to indemnity for the expenses that the Court

                                      -35-
<PAGE>
 
of Common Pleas or other court deems proper.

          Section 13.3.  Employees and Agents.  The Corporation may indemnify,
                         --------------------                                 
to the extent permitted under these Bylaws, any person who is or was an employee
or agent of the Corporation, other than an officer or director of the
Corporation, or is or was serving at the request of the Corporation as an
officer, director, employee or agent of another domestic or foreign corporation
for profit or not-for-profit, partnership, joint venture, trust or other
enterprise, against expenses (including attorneys' fees), judgments, fines and
amounts paid in settlement actually and reasonably incurred by him in connection
with the defense or settlement of any threatened, pending or completed action,
suit or proceeding, whether civil, criminal, administrative or investigative
(including actions by or in right of the Corporation to procure a judgment in
its favor), arising out of, or in connection with, any actual or alleged act or
omission or by reason of his service on behalf of the Corporation, provided such
person has met the applicable standards of conduct as set forth in Section 13.2
with respect to actions by or in right of the Corporation and as set forth in
Section 13.1 with respect to all other actions.

          Section 13.4.  Mandatory Indemnification.  To the extent that a
                         -------------------------                       
director, officer, employee or agent of the Corporation has been successful on
the merits or otherwise in defense of any action or proceeding referred to in
Sections 13.1, 13.2 or 13.3, or in defense of any claim, issue or matter

                                      -36-
<PAGE>
 
therein, he or she shall be indemnified by the Corporation against expenses
(including attorneys' fees) actually and reasonably incurred by him or her in
connection therewith.

          Section 13.5.  Advancing Expenses.  Expenses (including attorneys'
                         ------------------                                 
fees) incurred by an officer, director, employee or agent in defending any
action or proceeding referred to in this Article XIII may be paid by the
Corporation in advance of the final disposition of the action or proceeding upon
receipt of an undertaking by or on behalf of such person to repay such amount if
it is ultimately determined that he or she is not entitled to be indemnified by
the Corporation as authorized in this Article XIII.

          Section 13.6.  Procedure.
                         --------- 
               (a)  Unless ordered by a court, any indemnification under Section
13.1, 13.2 or 13.3 shall be made by the Corporation only as authorized in a
specific case upon a determination that indemnification of the director,
officer, employee or agent is proper in the circumstances because he or she has
met the applicable standard of conduct set forth in Section 13.1, 13.2 or 13.3.
(b) Expenses shall be advanced by the Corporation to a director or officer of
the Corporation upon a determination that such person has met the applicable
standard of conduct set forth in Section 13.1 or 13.2 and has satisfied the
terms set forth in Section 13.5 of this Article XIII.

               (c)  Expenses may be advanced to an employee or

                                      -37-
<PAGE>
 
agent of the Corporation, other than an officer or director of the Corporation,
upon a determination that such employee or agent has satisfied the terms of
Section 13.3 and 13.5 and, in view of all the circumstances of the case, such
person is fairly and reasonably entitled to advancement of expenses.

               (d)  All determinations under this Section 13.6
shall be made:

                    (1)  With respect to indemnification under Section 13.3 and
advancement of expenses under Section 13.6(c), by the Board.

                    (2)  With respect to indemnification under Section 13.1 or
13.2 and advancement of expenses under Section 13.6(b),

                         (A)  By the Board by a majority vote of a quorum
consisting of directors who were not parties to such action or proceeding, or

                         (B)  If such a quorum is not obtainable, or, if
obtainable and if a majority vote of a quorum of disinterested directors so
directs, by independent legal counsel in a written opinion, or

                         (C)  By the shareholders.

          Section 13.7.  Nonexclusivity of Indemnification.
                         ---------------------------------

                         (a)  The indemnification and advancement of expenses
provided by, or granted pursuant to, this Article XIII shall not be deemed
exclusive of any other rights to which a person seeking indemnification or
advancement of expenses may be

                                      -38-
<PAGE>
 
entitled under any Bylaw, statute, agreement, vote of shareholders or
disinterested directors or otherwise, both as to actions in his or her official
capacity and as to actions in another capacity while holding that office.
Sections 1728 (relating to interested directors; quorum) and 2538 (relating to
interested shareholders) of the 1988 BCL shall be applicable to any Bylaw,
contract or transaction authorized by the Board under this Section 13.7. The
Corporation may create a fund of any nature, which may, but need not be, under
the control of a trustee, or otherwise secure or insure in any manner its
indemnification obligations, whether arising under or pursuant to this Article
XIII or otherwise.

                         (b)  Indemnification pursuant to Section 13.7(a) shall
not be made in any case where the act or failure to act giving rise to the claim
for indemnification is determined by a court to have constituted willful
misconduct or recklessness.

                         (c)  Indemnification pursuant to Section 13.7(a) under
any Bylaw, statute, agreement, vote of shareholders or directors or otherwise,
may be granted for any action taken or any failure to take any action and may be
made whether or not the Corporation would have the power to indemnify the person
under any other provision of law except as provided in this Section 13.7 and
whether or not the indemnified liability arises or arose from any threatened or
pending or completed action by or in the right of the Corporation.

          Section 13.8.  Insurance.  The Corporation shall have
                         ---------                             
                           
                                     -39-
<PAGE>
 
power to purchase and maintain insurance on behalf of any person who 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 domestic or foreign corporation for profit or not-for-profit,
partnership, joint venture, trust or other enterprise against any liability
asserted against such person and incurred by him or her in any such capacity, or
arising out of his or her status as such, whether or not the Corporation would
have the power to indemnify him or her against that liability under the
provisions of this Article XIII or the 1988 BCL.

          Section 13.9.  Past Officers, Directors, Employees and Agents.  The
                         ----------------------------------------------      
indemnification and advancement of expenses provided by, or granted pursuant to,
this Article XIII shall, unless otherwise provided when authorized or ratified,
continue as to a person who has ceased to be a director, officer, employee or
agent of the Corporation and shall inure to the benefit of the heirs and
personal representatives of that person.

          Section 13.10. Employee Benefit Plans.  For purposes of this Article
                         ----------------------                               
XIII, (1) references to an "other enterprise" shall include employee benefit
plans of the Corporation or any of its subsidiaries or affiliates; (2) the
Corporation shall be deemed to have requested a director, officer, employee or
agent of the Corporation to serve as a fiduciary with respect to an employee
benefit plan where the performance by such person of duties to the Corporation
also imposes duties on, or otherwise

                                      -40-
<PAGE>
 
involves services by, such person as a fiduciary with respect to the plan; (3)
excise taxes assessed on a person with respect to an employee benefit plan shall
be deemed "fines"; and (4) actions taken or omitted in good faith by such person
with respect to an employee benefit plan in a manner such person reasonably
believed to be in the interest of the participants and beneficiaries of the plan
shall be deemed to be action that is not opposed to the best interests of the
Corporation.

                                      -41-

<PAGE>
 
                                                                  EXHIBIT 10.34











                            ASSET PURCHASE AGREEMENT

                             dated February 11, 1998

                                     between

                            ROCHE HEALTHCARE LIMITED

                                       and

                                 CENTOCOR, INC.
<PAGE>
 
                                TABLE OF CONTENTS

<TABLE> 

<S>  <C>                                                                                    <C> 
1.   DEFINITIONS............................................................................2

2.   ASSETS BEING SOLD......................................................................6
     2.1.     Patents.......................................................................6
     2.2.     Licenced Patents..............................................................7
     2.3.     Patent Applications...........................................................7
     2.4.     Fujisawa Patent Licence.......................................................8
     2.5.     Trademarks....................................................................8
     2.6.     Registrations.................................................................8
     2.7.     Manufacturing Technology and Know-How.........................................9
     2.8.     Research and Development Materials............................................9
     2.9.     Clinical Data................................................................10
     2.10.    World-wide Safety Reports....................................................10
     2.11.    Marketing and Promotional Documents..........................................10
     2.12.    Inventory....................................................................10
     2.13.    Assumed Agreements...........................................................11
     2.14.    Other Assets.................................................................11
     2.15.    Tangible Assets..............................................................11
     2.16.    Non-exclusive Licences.......................................................11
     2.17.    Limitation of Sale of Assets.................................................12

3.   PURCHASE PRICE........................................................................12
     3.1.     Purchase Price...............................................................12
     3.2.     Allocation of Purchase Price.................................................12
     3.3.     Payment for Inventory........................................................12
     3.4.     Refund of Purchase Price.....................................................13
     3.5.     Royalty Payments.............................................................14

4.   REPRESENTATIONS AND WARRANTIES OF PARENT..............................................17
     4.1.     Organisation.................................................................17
     4.2.     Authority....................................................................17
     4.3.     No Violation or Conflict.....................................................17
     4.4.     No Government Restrictions...................................................17
     4.5.     Title to Assets..............................................................17
     4.6.     Patents......................................................................18
     4.7.     Trademarks...................................................................18
     4.8.     Registrations................................................................18
     4.9.     Know-How and Know-How Licence................................................19
     4.10.    Inventory....................................................................19
     4.11.    Taxes........................................................................19
</TABLE> 
<PAGE>
 
<TABLE> 
<S>  <C>      <C>                                                                          <C> 
     4.12.    Absence of Certain Changes...................................................19
     4.13.    Violations of Law............................................................19
     4.14.    Financial Information........................................................19
     4.15.    Litigation...................................................................20
     4.16.    Sufficiency of Assets........................................................20
     4.17.    Conduct of Business..........................................................20
     4.18.    Retavase Business............................................................21

5.   REPRESENTATIONS AND WARRANTIES OF BUYER...............................................21
     5.1.     Organisation.................................................................21
     5.2.     Authority....................................................................21
     5.3.     No Violation or Conflict.....................................................21
     5.4.     No Government Restrictions...................................................21
     5.5.     Litigation...................................................................21
     5.6.     Financing....................................................................22
     5.7.     Assets.......................................................................22

6.   PARENT'S COVENANTS....................................................................22
     6.1.     Maintenance of Assets/Conduct of Business....................................22
     6.2.     Compliance with Laws.........................................................23
     6.3.     Access.......................................................................23
     6.4.     Patent Maintenance and Defence...............................................23
     6.5.     Sale of Retavase by the Roche Group..........................................24
     6.6.     Sales Force..................................................................24
     6.7.     Further Assurances...........................................................24
     6.8.     Nonassertion.................................................................25
     6.9.     Genentech Disclosure.........................................................25
     6.10.    Control of Genentech, Inc....................................................25
     6.11.    Keep Well Agreement..........................................................26

7.   BUYER'S COVENANTS.....................................................................26
     7.1.     Approvals and Registrations for Transfer of Distribution of
              Products.....................................................................26
     7.2.     Labelling....................................................................26
     7.3.     References to Parent.........................................................27
     7.4.     Further Assurances...........................................................27
     7.5.     Financing....................................................................27
     7.6.     Notification.................................................................27
</TABLE> 




                                      ii
<PAGE>
 
<TABLE> 
<S>  <C>      <C>                                                                          <C> 
8.   COVENANTS BY BUYER AND PARENT.........................................................28
     8.1.     Assignment of Patents and Trademarks.........................................28
     8.2.     Assignment of Registrations..................................................28
     8.3.     Clinical Studies Transfer....................................................29
     8.4.     Access to Information........................................................29
     8.5.     Press Releases...............................................................29
     8.6.     Customer Information.........................................................30
     8.7.     Hospital and Other Purchasing Contracts......................................30
     8.8.     Reconciliation with the Agreement Containing Consent
              Order; Canadian Filings......................................................30
     8.9.     Genentech Patent Suits.......................................................30
     8.10.    Transition Services..........................................................32
     8.11.    Returns......................................................................32
     8.12.    Chargebacks and Rebates......................................................32
     8.13.    Confidentiality..............................................................32
     8.14.    Consents.....................................................................32
     8.15.    Cooperation on Safety Reports................................................32
     8.16.    Manufacturing Improvements...................................................32
     8.17.    Importation..................................................................33
     8.18.    Product Recall; Product Liability............................................33

9.   MANUFACTURING.........................................................................33
     9.1.     Supply Agreement.............................................................33
     9.2.     Parent's Representations and Warranties for its Supplies.....................33
     9.3.     Technology Transfer..........................................................34
     9.4.     Approvals....................................................................34

10.  CONDITIONS PRECEDENT TO CLOSING.......................................................35
     10.1.    Conditions to Obligations of Buyer and Parent................................35
     10.2.    Conditions to Obligations of Buyer...........................................36
     10.3.    Conditions to Obligations of Parent..........................................36

11.  THE CLOSING...........................................................................37
     11.1.    The Closing..................................................................37
     11.2.    Deliveries by Parent.........................................................37
     11.3.    Deliveries by Buyer..........................................................38
     11.4.    Effects of Closing...........................................................38
</TABLE> 





                                      iii
<PAGE>
 
<TABLE> 
<S>  <C>       <C>                                                                         <C> 
12.  TERMINATION...........................................................................39
     12.1.    Termination..................................................................39
     12.2.    Effect of Termination........................................................40
     12.3.    Termination by the FTC.......................................................40

13.  SURVIVAL; REMEDIES; CLAIMS; INDEMNIFICATION...........................................41
     13.1.    Remedy for Breach............................................................41
     13.2.    Indemnification by Parent....................................................41
     13.3.    Indemnification by Buyer.....................................................42
     13.4.    Notice.......................................................................42
     13.5.    Participation in Defence.....................................................42
     13.6.    Settlements..................................................................43
     13.7.    Other Claims.................................................................43

14.  NOTICES...............................................................................44

15.  ARBITRATION AND GOVERNING LAW.........................................................45

16.  ADDITIONAL TERMS......................................................................45
     16.1.    Brokers......................................................................45
     16.2.    Expenses, Taxes and Fees.....................................................46
     16.3.    Entire Agreement.............................................................46
     16.4.    Successors and Assigns.......................................................46
     16.5.    Amendments; No Waiver........................................................46
     16.6.    Counterparts.................................................................46
     16.7.    Captions.....................................................................46
</TABLE> 



                                      iv
<PAGE>
 
                            ASSET PURCHASE AGREEMENT


         This ASSET PURCHASE AGREEMENT (this "Agreement") is made and entered
into on February 11, 1998 by and between Roche Healthcare Limited, Hamilton,
Bermuda ("Parent") and Centocor, Inc., a Pennsylvania corporation
("Buyer").

         Whereas Parent entered into a Stock Purchase Agreement (the "Stock
Purchase Agreement") dated 24 May 1997 with the owners of Corange Limited,
Hamilton, Bermuda ("Corange") providing for the acquisition by Parent of all
shares of Corange (the "Corange Transaction"), which among other things owns the
BM Group (as hereinafter defined);

         Whereas, pursuant to an Agreement Containing Consent Order to be
entered into by Parent with the Federal Trade Commission (the "FTC") in order to
permit consummation of the Corange Transaction, a copy of which will be provided
to Buyer as soon as accepted by the FTC, Parent will be required to cause BM
Group companies to divest RETAVASE in the United States and Canada;

         Whereas the Corange Transaction is further subject to the approval of
other merger control authorities, including the Director of Investigation and
Research in Canada (the "Director") appointed under the Competition Act (Canada)
as well as approval under the Investment Canada Act, if required;

         Whereas, Buyer desires to purchase the Assets (as defined below) from
the BM Group companies and Parent desires to cause Sellers (as hereinafter
defined) to sell the Assets to Buyer, upon the terms and subject to the
conditions hereinafter set forth;

         Now, therefore, in consideration of the foregoing and of the mutual
promises, covenants, representations, warranties and agreements contained
herein, and intending to be legally bound, the parties hereto agree as follows:
<PAGE>
 
1.       DEFINITIONS

              1.1.   "Active Ingredient" means recombinant reteplase; (rPA), a
         recombinant, nonglycosylated plasminogen activator, containing amino
         acids 1-3 and 176-527 of the amino acid sequence of the tissue-type
         plasminogen activator.

              1.2.   "Affiliate" of an entity means any corporation or other
         business entity controlled by, controlling or under common control
         with, such entity. For this purpose "control" shall mean direct or
         indirect beneficial ownership of more than fifty percent (50%) of the
         voting or income interest in such corporation or other business entity;
         provided, however, Genentech, Inc. and its subsidiaries shall not be
         considered an Affiliate of Parent.

              1.3.   "Assets" has the meaning ascribed to such term in 
         Section 2.

              1.4.   "Assumed Agreements" has the meaning ascribed to such
         term in Section 2.13.

              1.5.   "best of Parent's knowledge" means the best knowledge of
         Parent and Sellers.

              1.6.   "BM" means Boehringer Mannheim GmbH, Mannheim, Germany.

              1.7.   "BMC" means Boehringer Mannheim Corporation, Indianapolis,
         Indiana, USA.

              1.8.   "BM Canada" means Boehringer Mannheim Ltd., Laval, Quebec,
         Canada.

              1.9.   "BM Group" means BM, BMC and BM Canada and any Affiliates
         of such companies, and any other company in the Boehringer Mannheim
         group involved in the Business.

              1.10.  "BM Labelling" means the printed labels, labelling and
         packaging materials, including printed carton, container label and
         package inserts, as currently used by BMC or its Affiliates or
         promotion partners for the Product in the Territory.

              1.11.  "BM Monthly Sales Statements" means the BM Net Sales by
         Product (including units) in the Territory in local currency, on a
         monthly

                                       2
<PAGE>
 
         basis for each month beginning with January 1997 until the end of the
         month in which Closing occurs.

              1.12.  "BM Net Sales" means gross sales of BMC of the Product in
         the Territory after deduction of returns, sales rebates (price
         reduction) and volume (quantity) discount as well as sales taxes (e.g.,
         value added taxes) and other taxes directly linked to the sales (e.g.,
         excise taxes).

              1.13.  "Business" means the business as conducted at the Closing
         Date by Sellers with respect to the Product, whether approved for sale
         or in research or development, in the Territory. "Retavase Business"
         means the business with respect to each presentation of any
         pharmaceutical preparation (including future formulation changes and
         production intermediates) containing the Active Ingredient, whether
         approved for sale or in research or development in the Territory.

              1.14.  "Clinical Data" has the meaning ascribed to such term in
         Section 2.9.

              1.15.  "Closing" has the meaning ascribed to such term in 
         Section 11.1.

              1.16.  "Closing Date" has the meaning ascribed to such term in
         Section 11.1.

              1.17.  "Damages" has the meaning ascribed to such term in Section
         13.2.1.

              1.18.  "DHC" means Department of Health Canada.

              1.19.  "Disclosure Schedule" means the disclosure schedule
         delivered as of the date hereof to Buyer by Parent in connection with
         this Agreement. The sections of the Disclosure Schedule correspond to
         the sections of this Agreement, but information disclosed in any
         section of the Disclosure Schedule shall be deemed to be disclosed as
         to all relevant sections thereof, except as otherwise specifically
         provided herein.

              1.20.  "DPM Agreement" has the meaning ascribed to such term in
         Section 2.13.

              1.21.  "FDA" means the United States Food and Drug Administration.

                                       3
<PAGE>
 
              1.22.  "FTC" means the United States Federal Trade Commission.

              1.23.  "Genentech Patent Suits" means (a) with respect to the
         United States the patent infringement suit against BM filed by
         Genentech, Inc. in the United States District Court for the District of
         Massachusetts (Judge Saris) based on the Genentech patents USP
         5,221,619 (Itakura), USP 4,342,832 (Goeddel and Heyneker), USP
         4,511,502 (Builder), USP 5,185,259 (Goeddel, Kohr) and USP 5,034,225
         (Bennett); and (b) with respect to Germany (i) the patent infringement
         suit versus BM filed by Genentech, Inc. and Boehringer Ingelheim
         International GmbH in the District Court (Landgericht) of Dusseldorf
         ([docket number] 4 O 178/96) in May 1996 based on the patent EP 0 093
         619 (Goeddel Patent) and (ii) the extension filed versus BM by
         Genentech, Inc. and Boehringer Ingelheim International GmbH in the
         District Court (Landgericht) of Dusseldorf ([docket number] 4 O 25/97)
         in November 1996 including the patent EP 0 217 379 (Mochida Patent) and
         the patent EP 0 228 862 (Bennett Patent), (iii) the nullity suit versus
         the patent EP 0 093 619 (Goeddel Patent) filed by BM in October 1996 in
         the German Federal Patent Court in Munich, (iv) the nullity suit versus
         the patent EP 0 217 379 (Mochida Patent) filed by BM in the German
         Federal Patent Court in January 1997 and (v) the appeal of BM filed 7
         September 1995 versus the decision of the European Patent Agency (EPA)
         on BM's opposition against the European Patent 0 228 862 (Bennett).

               1.24.  "HSR Act" means the Hart-Scott-Rodino Antitrust
         Improvement Act of 1976, as amended.

               1.25.  "Indemnifiable Claims" has the meaning ascribed to such
         term in Section 13.2.1 and 13.3.

               1.26.  "Indemnified Party" has the meaning ascribed to such term
         in Section 13.4.

               1.27.  "Indemnifying Party" has the meaning ascribed to such term
         in Section 13.4.

               1.28.  "Inventory" has the meaning ascribed to such term in
         Section 2.12.

               1.29.  "Keep Well" has the meaning ascribed to such term in
         Section 6.11.

                                       4
<PAGE>
 
              1.30.   "Know-How" and "Know-How Licence" have the meanings
         ascribed to such terms in Section 2.7.

              1.31.   "Licenced Patent Applications" has the meaning ascribed to
         such term in Section 2.3.

              1.32.   "Licenced Patents" has the meaning ascribed to such term
         in Section 2.2.

              1.33.   "Marketing and Promotional Documents" has the meaning
         ascribed to such term in Section 2.11.

              1.34.   "Material Adverse Effect" means a material adverse effect
         on the Assets and the Business taken as a whole.

              1.35.   "Morgan Stanley" has the meaning ascribed to such term in
         Section 5.6.

              1.36.   "Patents" has the meaning ascribed to such term in
         Section 2.1.

              1.37.   "PCI Agreement" has the meaning ascribed to such term in
         Section 2.13.

              1.38.   "Product" means each presentation of any pharmaceutical
         preparation (including formulation changes and production
         intermediates) containing the Active Ingredient, whether registered,
         marketed or in development by Sellers, as of the Closing Date.

              1.39.   "Purchase Price" means such term as used in Section 3.

              1.40.   "Registrations" has the meaning ascribed to such term in
         Section 2.6.

              1.41.   "Research and Development Materials Licence" has the
         meaning ascribed to such term in Section 2.8.

              1.42.   "Roche Group" means Roche Holding Ltd, a Swiss
         corporation, and its Affiliates (excluding Genentech, Inc. and
         subsidiaries thereof).

              1.43.   "Supply Agreement" means the agreement referred to in
         Section 9.1.

                                       5
<PAGE>
 
              1.44.   "Territory" means the United States of America and Canada
         and their respective possessions or territories.

              1.45.   "Trademarks" has the meaning ascribed to such term in
         Section 2.5.

              1.46.   "Transition Services Agreement" has the meaning ascribed
         to such term in Section 8.10.

              1.47.   "World-wide Safety Reports" has the meaning ascribed to
         such term in Section 2.10.

2.       ASSETS BEING SOLD

              Subject to Section 2.17 and the other terms and conditions of
         this Agreement, at Closing, Parent shall cause the relevant companies
         of the BM Group to be designated (collectively, the "Sellers") to sell,
         transfer, assign, licence or sublicence, as specified below, to Buyer
         and to deliver to Buyer the assets listed below (the "Assets"), and
         Buyer shall assume all the rights, titles and interest in the Assets
         and all obligations and responsibilities associated therewith as stated
         in this Agreement; provided, however, that except as specifically
         stated herein, Buyer shall not assume any liabilities, contingent or
         otherwise, arising out of or related to the conduct of the Business
         prior to the Closing Date.

              It is intended by the parties that the sale, transfer, assignment,
         conveyance, delivery or licence or sublicence to Buyer pursuant to this
         Agreement of all assets and rights of Sellers relating to the Business
         shall, together with the Supply Agreement, the Transition Services
         Agreement and Buyer's own resources, permit Buyer as of the Closing
         Date to conduct the Retavase Business in the same manner as is
         currently conducted by Sellers.

              Prior to Closing, Buyer may designate one or more Affiliates of
         Buyer to which the Assets shall be transferred at Closing by Sellers.

              At Closing, Parent shall cause the following to occur:

              2.1.   Patents. Sellers shall sell, transfer, assign, convey and
         deliver to Buyer all of Sellers' rights, title and interest in the
         patents and patent rights set forth in Schedule 2.1 hereto (the
         "Patents"), and patents of addition, re-examinations, reissues,
         extensions, granted supplementary

                                       6
<PAGE>
 
         protection certificates, substitutions, confirmations, registrations,
         revalidations, revisions, additions and the like, of or to said patents
         and patent rights and any and all continuations and
         continuations-in-part.

              2.2.   Licenced Patents. Sellers shall grant and deliver to Buyer
         a perpetual, paid-up, irrevocable, royalty-free, unlimited (other than
         as provided in this Agreement) licence for the Territory under the
         patents set forth in Schedule 2.2 hereto (the "Licenced Patents"), with
         the right to sublicence; such licence (and any sublicence thereunder)
         shall be exclusive for use in the Retavase Business (or outside the
         Territory solely and exclusively with respect to the manufacture of, or
         research, development, or the conduct of clinical trials with respect
         to, the Active Ingredient or the Product for sale in the Territory),
         and the Roche Group (including without limitation the BM Group
         companies) shall not retain any right to use or licence such Licenced
         Patents for use in the Retavase Business. Except for use in the
         Retavase Business and as set forth in Section 2.16, the Roche Group
         (including without limitation the BM Group companies) retains, and is
         not transferring hereunder, the exclusive right to use or to licence
         such patents for use with any other products in or outside the
         Territory as well as for the Active Ingredient or the Product outside
         the Territory.

              2.3.   Patent Applications.

            2.3.1.   Sellers shall grant and deliver to Buyer a perpetual, paid-
         up, irrevocable, royalty-free, unlimited (other than as provided in
         this Agreement) licence for the Territory under the patent applications
         set forth in Schedule 2.3 hereto (the "Licenced Patent Applications"),
         and any and all divisions, continuations and continuations-in-part,
         with the right to sublicence, such licence (and any sublicence
         thereunder) shall be exclusive for use in the Retavase Business (or
         outside the Territory solely and exclusively with respect to the
         manufacture of, or research, development or the conduct of clinical
         trials with respect to, the Active Ingredient or the Product for sale
         in the Territory), and the Roche Group (including without limitation
         the BM Group companies) shall not retain any right to use or licence
         such Licenced Patent Applications for use in the Retavase Business.
         Except for use in the Retavase Business and as set forth in Section
         2.16, the Roche Group (including without limitation the BM Group
         companies) retains, and is not transferring hereunder, the exclusive
         right to use or to licence such patent applications and patents that
         may result therefrom for use with any other products in or outside the
         Territory as well as for the Active Ingredient or the Product outside
         the Territory.

                                       7
<PAGE>
 
              2.3.2.  If based on a Licenced Patent Application a patent should
         issue which is solely used in the Retavase Business, Parent shall
         inform Buyer when a notice of allowance is issued and such patent shall
         be assigned to and assumed by Buyer in accordance with the principles
         set forth in Section 8.1 below.

              2.4.    Fujisawa Patent Licence. BM shall assign or sublicence to
         Buyer the Licence Agreement between Fujisawa Pharmaceutical Co., Ltd.,
         Osaka, Japan, and Boehringer Mannheim GmbH, Mannheim, Germany, dated 9
         September 1997/15 September 1997, relating to the Business ("Fujisawa
         Patent Licence") and Buyer shall, in the event of an assignment, assume
         the Fujisawa Patent Licence. In the event that after good faith
         negotiations among Parent, Buyer and Fujisawa, the parties agree that
         Buyer, upon assumption of the Fujisawa Patent Licence, will pay a
         licence fee in excess of 3%, Parent agrees that it will pay for any
         such fee in excess of 3%. In connection with the payment by Parent of
         any fee pursuant to this provision, Parent shall ensure that it does
         not obtain any confidential information from Buyer.

              2.5.    Trademarks. Sellers shall sell, transfer, assign, convey
         and deliver to Buyer all of Sellers' rights, title and interest in the
         trademark/service mark applications for the Business, which are set
         forth on Schedule 2.5 (the "Trademarks"), together with the pertaining
         documents, such as registration and renewal confirmations, trademark
         agreements and consent letters, etc. "Trademarks" also includes any
         copyrights and any unregistered trade dress that are owned by Sellers
         which are associated solely with the Business and (only as to trade
         dress) currently used on or in association with the Business.
         "Trademarks" shall not include copyrights and trade dress associated
         with the divisions, companies or corporate entities of Parent, BM Group
         or their Affiliates or distributors. "Trademarks" also does not include
         copyrights and trade dress associated with the Product and also
         associated with products not being transferred to Buyer.

              2.6.    Registrations. Sellers shall sell, transfer, assign,
         convey and deliver to Buyer all of Sellers' rights, title and interest
         in the regulatory files and approvals, registrations and governmental
         authorisations, PLAs (product licence applications), DINs, compliance
         notices, licences and permits, and any applications to the FDA or the
         comparable Canadian body or bodies pending at the Closing Date,
         contractual rights, materials and information relating to FDA and other
         government or regulatory approvals, all of which relate to the Business
         and that are held by Sellers,

                                       8
<PAGE>
 
    which are set forth on Schedule 2.6 as well as the information contained
    therein (the "Registrations").

         2.7. Manufacturing Technology and Know-How. Sellers shall sell,
    transfer and deliver to Buyer the ownership and beneficial interest of BM in
    all BM manufacturing technology and know-how and trade secrets that is
    solely and exclusively used in the Business, all as set forth in Schedule
    2.7 (the "Know-How"); and a perpetual, paid-up, irrevocable, royalty-free
    licence, with right to sub-licence, to use any manufacturing technology and
    know-how that are used in the Retavase Business (or outside the Territory
    solely and exclusively with respect to the manufacture of the Active
    Ingredient or the Product (or a future formulation of the Product) for sale
    in the Territory) (but not exclusively used thereto or usable for other
    purposes as well) (the "Know-How Licence"); such licence (and any sublicence
    thereunder) shall be exclusive for use in the Retavase Business, and the
    Roche Group (including without limitation the BM Group companies) shall not
    retain any right to use or licence such know-how for use in the Retavase
    Business. Except as set forth in Section 2.16, the Roche Group (including
    without limitation the BM Group companies) retains, and is not transferring
    hereunder, the exclusive right to use or to licence such licenced
    manufacturing technology and know-how for use with any other products in or
    outside the Territory as well as for the Active Ingredient or the Product
    outside the Territory. The parties hereby acknowledge and agree that Know-
    How shall not include, and any limitation in the Know-How Licence shall not
    be binding on Buyer as to, any information Buyer can demonstrate (i) was in
    the public domain prior to the date of this Agreement or thereafter enters
    the public domain through no fault of Buyer, its affiliates or their
    respective representatives, (ii) was available to Buyer on a non-
    confidential basis prior to its disclosure to Buyer by Parent, Sellers,
    their affiliates or their respective representatives, (iii) is later
    lawfully acquired by Buyer from sources other than Parent, Sellers, their
    affiliates or their respective representatives who are not, to the best of
    knowledge of Buyer, subject to any legally binding obligation to keep such
    information confidential, or (iv) independently developed by Buyer without
    reference to the Know-How or Know-How Licence.

         2.8. Research and Development Materials. Sellers shall sell, transfer
    and deliver to Buyer copies of all the BM research and development reports
    existing as of the Closing Date which relate to the Business, a list of
    which is set forth on Schedule 2.8, and shall grant and deliver to Buyer a
    perpetual, paid-up, irrevocable, royalty-free licence, with a right to sub-
    licence, to use any such materials in the Retavase

                                       9
<PAGE>
 
    Business (the "Research and Development Materials Licence"). Such licence
    shall be exclusive for use in the Retavase Business (or outside the
    Territory solely and exclusively with respect to the manufacture of, or the
    conduct of clinical trials with respect to, the Active Ingredient or the
    Product in the Territory), and the Roche Group (including without limitation
    the BM Group companies) shall not retain any right to use or licence such
    materials for use in the Retavase Business. Except as set forth under
    Section 2.16, the Roche Group (including without limitation the BM Group
    companies) retains, and is not transferring hereunder, the exclusive right
    to use or to licence such materials for use with any other products in or
    outside the Territory as well as for the Active Ingredient or the Product
    outside the Territory.

         2.9. Clinical Data. Sellers shall sell, transfer and deliver to Buyer a
    copy of all Clinical Data contained in Seller's clinical databases referring
    to the Active Ingredient or the Product in the form of the SAS data sets
    (the "Clinical Data").

        2.10. World-wide Safety Reports. Sellers shall sell, transfer and
    deliver to Buyer a hard copy and an electronic copy in the form existing as
    of the Closing Date of all world-wide safety reports of BM and its
    Affiliates with respect to the Active Ingredient or the Product existing as
    of the Closing Date (the "World-wide Safety Reports").

        2.11. Marketing and Promotional Documents. Sellers shall sell, transfer
    and deliver to Buyer all hard copies and electronic copies existing as of
    the Closing Date of the marketing and promotional documents owned by
    Sellers, such as customer lists, marketing and promotional plans, documents
    and materials, field force training manuals and materials, and placebo or
    demonstration kits that are exclusively used in the Business (the "Marketing
    and Promotional Documents"). All such documents shall be shipped FOB
    Sellers' location. To the extent documents exist which contain marketing and
    promotional materials relating both to the Product in the Territory and to
    other products or the Product outside the Territory, Sellers shall transfer
    and not retain all portions of such documents relating to the Product in the
    Territory to Buyer.

        2.12. Inventory. Sellers shall sell, transfer and deliver to Buyer all
    inventory consisting of Product (including samples and placebo kits), that
    are owned by Sellers for the Territory and that have been approved or are
    subsequently approved as meeting specifications, have a minimum of 12 months
    of expiration dating and are otherwise saleable in the ordinary and normal
    course of business as of the Closing Date (the "Inventory"), the

                                      10
<PAGE>
 
    prices of which are set forth on Schedule 2.12(a) hereto; the location of
    which are set forth on Schedule 2.12(b); the quantity of which shall be set
    forth in a document delivered by Parent at Closing.

        2.13. Assumed Agreements. Subject to consent of the other parties to
    such agreements, Parent agrees to cause to be assigned, and Buyer agrees to
    assume, all rights and obligations of Sellers, under the Agreements listed
    below (the "Assumed Agreements").

      2.13.1. DPM Agreement. The Copromotion Agreement between BMC and The
    DuPont Merck Pharmaceutical Company, Philadelphia, dated 20 December, 1996
    for the copromotion of the Product in the United States of America (the "DPM
    Agreement").

      2.13.2. PCI Agreement. The Packaging Agreement between BMC and Packaging
    Coordinators, Inc., Philadelphia, dated 29th June, 1995 for the assembling
    and packaging of the kits as defined in that agreement (the "PCI
    Agreement").

      2.13.3. Other Agreements. The agreements set forth on Schedule 2.13.3.

        2.14. Other Assets. Sellers shall sell, transfer and deliver to Buyer
    (i) trade secrets, customer and supplier lists of Sellers to the extent
    related to the Business and (ii) files of Sellers to the extent related to
    the Genentech Patent Suits.

        2.15. Tangible Assets. Sellers shall sell, transfer and deliver to Buyer
    certain tangible assets related solely to the Business as agreed by the
    parties in good faith prior to the Closing Date to be selected from the list
    set forth on Schedule 2.15, provided that Sellers shall not be obligated to
    transfer any such assets not owned by Sellers.

        2.16. Non-exclusive Licences. Subject to Section 3.5, Sellers shall
    grant and deliver to Buyer a non-exclusive, perpetual, paid-up, irrevocable,
    unlimited (except as provided in this Agreement) licence in the Territory
    under the Licenced Patents, the Licenced Patent Applications (and any and
    all divisions, continuations and continuations-in-part), the Know-How
    Licence and the Research and Development Materials Licence, with the right
    to sublicence, for use in the human pharmaceutical field.

                                      11
<PAGE>
 
        2.17. Limitation of Sale of Assets. Buyer expressly acknowledges that
    the Roche Group is retaining certain information identical to that contained
    in the Patents, Registrations, Know-How, Research and Development Materials
    Licence, Clinical Data, World-wide Safety Reports, Marketing and Promotional
    Documents and the other assets pursuant to Section 2 which is relevant for
    the research, development, manufacture, control, packaging or release,
    marketing or sale of products similar or identical to the Active Ingredient
    or the Product outside the Territory for their own and/or authorised third
    parties' use outside the Territory. Buyer further expressly acknowledges
    that except as provided in Section 2.16 the Roche Group is retaining (and
    are not transferring hereunder) any and all assets used solely in the
    research, development, manufacture, control, packaging or release, marketing
    or sale of other products or projects in the Territory or outside the
    Territory and may use, licence or dispose of such assets in their discretion
    and Buyer shall not have any right to any such assets.

3.  PURCHASE PRICE

         3.1. Purchase Price. Subject to the terms and conditions of this
    Agreement, in reliance on the representations, warranties, covenants and
    agreements of Parent contained herein and the representations and warranties
    of Sellers to be made to Buyer at Closing, and in consideration of the sale,
    conveyance, assignment, transfer and delivery of the Assets provided for in
    Section 2 hereof, Buyer will deliver at Closing in full payment for the
    aforesaid sale, conveyance, assignment, transfer and delivery, the Purchase
    Price of US $335 million; US $315 million of which shall be paid to Sellers,
    by bank wire transfer at such banking institutions as have been designated
    by Parent not less than five (5) days prior to Closing and US$ 20 million of
    which shall be deposited in an escrow account pursuant to arrangements to be
    negotiated in good faith by Parent and Buyer prior to the Closing Date. This
    amount (together with interest thereon) shall be returned to Buyer upon the
    meeting of manufacturing milestones consistent with the manufacturing
    arrangements set forth in Section 9.4. In the event such manufacturing
    milestones are not met by Buyer, such amount shall be paid to Sellers.

         3.2. Allocation of Purchase Price. The parties shall negotiate in good
    faith an allocation of the Purchase Price.

         3.3. Payment for Inventory. In addition to the Purchase Price according
    to Section 3.1 above, Buyer shall pay to Parent, acting on behalf of
    Sellers, in US dollars for the Inventory, based on the quantity document

                                      12
<PAGE>
 
    delivered pursuant to Section 2.12 by Parent at Closing; provided that, at
    the request of Parent, any such payment may be made directly to the relevant
    Seller. Buyer shall effect such payment by bank wire transfer so that Parent
    or relevant Seller shall receive it in its designated bank account within 10
    (ten) days from Closing.

         3.4. Refund of Purchase Price. (a) In the event Buyer, without any
    breach of this Agreement, as a result of (i) a binding determination
    (including a permanent, temporary or preliminary injunction for so long as
    such injunction is not stayed or vacated) in connection with the Genentech
    Patent Suits or (ii) a settlement of the Genentech Patent Suits; provided
    that such settlement is commercially reasonable for Buyer under the
    circumstances in absence of Parent's reimbursement obligations pursuant to
    this Section 3.4:

         (A)  becomes unable during the life of the relevant Genentech patents
         to engage in the manufacture or sale of the Product in the Territory,
         Parent, acting on behalf of Sellers, shall (1) in the event Buyer's
         inability to engage in the manufacture or sale of the Product in the
         Territory continues for a period of three months or less, reimburse
         Buyer for lost profits during such period in an amount not to exceed
         the Purchase Price (not including the escrow amount), (2) in the event
         Buyer's inability to engage in the manufacture or sale of the Product
         in the Territory continues for a period of greater than three months
         but less than or equal to six months, Parent shall refund 25% of the
         Purchase Price (not including the escrow amount) to Buyer, (3) in the
         event Buyer's inability to engage in the manufacture or sale of the
         Product in the Territory continues for a period of greater than six
         months but less than or equal to 12 months, Parent shall reimburse 75%
         of the Purchase Price (not including the escrow amount) to Buyer and
         (4) in the event Buyer's inability to engage in the manufacture or sale
         of the Product in the Territory continues for a period of greater than
         12 months, Parent shall reimburse 100% of the Purchase Price (not
         including the escrow amount) to Buyer, in each case net of payments to
         Buyer made pursuant to the clauses (1), (2) and (3), as the case may
         be; provided that in the event a binding determination occurs within
         six months prior to the expiration of the relevant Genentech patent or
         patents, Parent shall have no obligation to make a further refund of
         the Purchase Price to Buyer;

         (B)  becomes obligated to make payments to Genentech, Inc. or an
         affiliate thereof (1) for damages (including lost profits) or (2)

                                      13
<PAGE>
 
         for a reasonable royalty, in either case by reason of any award or
         agreement, Parent shall refund to Buyer any such payments actually made
         by Buyer;

         (C)  it being understood that the total payments to Buyer pursuant to
         paragraphs (A) and (B) above shall in no event exceed 125% of the
         Purchase Price (and in no event shall include any portion of the escrow
         amount that has already been returned to Buyer).

    (b)  Parent, acting on behalf of Sellers, shall pay 50% of all reasonable
    fees and expenses of attorneys (who are not employees of Buyer) and fees
    paid to agents, experts and courts incurred in connection with the defence
    (including counterclaims, nullity actions, opposition proceedings and
    appeals) of the Genentech Patent Suits, subject to audit of such fees and
    expenses by a nationally recognised independent auditor to be mutually
    agreed to by Parent and Buyer. The statements that are provided by such
    auditor to Parent setting forth the fees and expenses due shall not reveal
    any detailed confidential information regarding Buyer's conduct of, or
    strategy with respect to, the Genentech Patent Suits. Any expenses relating
    to in-house attorneys shall be paid by the party incurring such expenses.

    (c)  Buyer agrees to pursue vigorously the defence of the Genentech Patent
    Suits, including, subject to applicable law, to pursue in good faith any
    appeal of an adverse determination thereof.

         3.5. Royalty Payments.

       3.5.1. Buyer shall be required to make royalty payments and other
    arrangements under the circumstances described below for products other than
    the Product (and for the Product in the circumstance described in subsection
    (D)(x) of this Section 3.5.1), if following the Closing Date Buyer

          (i) commercialises any product (other than the Product or a future
          formulation of the Product) using any of the Licenced Patents, the
          Licenced Patent Applications (and any and all divisions, continuations
          and continuations-in-part), the Know-How Licence or the Research and
          Development Materials Licence; or

          (ii) sublicences or cross-licences any of the Licenced Patents, the
          Licenced Patent Applications (and any and all divisions,

                                      14
<PAGE>
 
THE REGISTRANT HAS REQUESTED CONFIDENTIAL TREATMENT FOR CERTAIN PORTIONS OF THIS
AGREEMENT. THOSE PORTIONS HAVE BEEN OMITTED FROM THIS COPY OF THE AGREEMENT AT 
THE PLACES INDICATED BY ASTERICKS (*); AND HAVE BEEN FILED SEPARATELY WITH THE 
SECURITIES AND EXCHANGE COMMISSION

          continuations and continuations-in-part), the Know-How Licence or the
          Research and Development Materials Licence, then the Roche Group shall
          receive value for such commercialisation, sublicencing or cross-
          licencing arrangements in accordance with the following principles:

              (A) if Buyer commercialises a product (other than the Product or a
              future formulation of the Product) that uses any of the Licenced
              Patents, the Licenced Patent Applications (and any and all
              divisions, continuations and continuations-in-part), the Know-How
              Licence or the Research and Development Materials Licence Buyer
              shall pay to the Roche Group an aggregate royalty of [*] of the
              net sales of such product;

              (B) if Buyer sublicences any of the Licenced Patents, the Licenced
              Patent Applications (and any and all divisions, continuations and
              continuations-in-part), the Know-How Licence or the Research and
              Development Materials Licence to a third party in return for a
              royalty payment, Buyer shall pay to the Roche Group [*] of such
              royalty payment;

              (C) if Buyer cross-licences any of the Licenced Patents, the
              Licenced Patent Applications (and any and all divisions,
              continuations and continuations-in-part), the Know-How Licence or
              the Research and Development Materials Licence to a third party
              and receives any right to such third party's products or products
              in development, and Buyer commercialises such products, then Buyer
              shall pay to the Roche Group an aggregate royalty of [*] of the
              net sales of such products;

              (D) if Buyer cross-licences to a third party any of the Licenced
              Patents, the Licenced Patent Applications (and any and all
              divisions, continuations and continuations-in- part), the Know-How
              Licence or the Research and Development Materials Licence and
              receives the right to use any of such third party's manufacturing
              technology, then if such manufacturing technology is

                   (x) specifically applicable to the Product (or a future
                   formulation of the Product) and Buyer obtains a

                                      15

                       Confidential Treatment Requested
<PAGE>

THE REGISTRANT HAS REQUESTED CONFIDENTIAL TREATMENT FOR CERTAIN PORTIONS OF THIS
AGREEMENT. THOSE PORTIONS HAVE BEEN OMITTED FROM THIS COPY OF THE AGREEMENT AT 
THE PLACES INDICATED BY ASTERICKS (*); AND HAVE BEEN FILED SEPARATELY WITH THE 
SECURITIES AND EXCHANGE COMMISSION
 
                   worldwide sublicence therefor, Buyer shall grant to the Roche
                   Group a non-exclusive, perpetual, paid-up, irrevocable,
                   royalty-free licence for use in the manufacture of the
                   Product (or a future formulation of the Product) outside the
                   Territory;

                   (y) applicable to products other than the Product (or a
                   future formulation of the Product) and Buyer obtains a
                   worldwide licence therefor, the Roche Group shall have the
                   option to receive (1) a non-exclusive, perpetual, paid-up,
                   irrevocable, royalty-free sublicence to such manufacturing
                   technology for use in the manufacture of any such products or
                   (2) [*] of the gross margin benefit achieved by Buyer as a
                   result of Buyer's application of such manufacturing
                   technology to any such products; or

                   (z) applicable to products other than the Product (or a
                   future formulation of the Product) and Buyer obtains a
                   licence therefor limited to the Territory, the Roche Group
                   shall receive [*] of the gross margin benefit achieved by
                   Buyer as a result of Buyer's application of such
                   manufacturing technology to any such products;

              (E) if Buyer enters into any sublicence or cross-licence
              arrangement in connection with any of the Licenced Patents, the
              Licenced Patent Applications (and any and all divisions,
              continuations and continuations-in-part), the Know-How Licence or
              the Research and Development Materials Licence not specifically
              described in clauses (A) through (D), Parent and Buyer agree to
              negotiate in good faith an arrangement based upon the principles
              set forth above.

       3.5.2. If the Roche Group is entitled to receive payments pursuant to
    Section 3.5.1, Buyer shall promptly inform the Roche Group of its
    entitlement to such payments and an independent auditor may, upon the
    request of the Roche Group, be appointed to verify the amount of any such
    payment properly due to the Roche Group and the Roche Group and Buyer shall
    implement procedures to ensure that no confidential information is shared
    between the parties in connection with the calculation or verification of
    such payments.

                                      16

                       Confidential Treatment Requested
<PAGE>
 
4.   REPRESENTATIONS AND WARRANTIES OF PARENT

         Parent hereby represents and warrants as follows:

         4.1. Organisation. Parent is a corporation duly organised, validly
     existing and in good standing under the laws of Bermuda, with full
     corporate power and authority to consummate the transactions contemplated
     hereby.

         4.2. Authority. The execution, delivery and performance of this
     Agreement by Parent have been duly and validly authorised by all necessary
     corporate proceedings, and this Agreement has been duly authorised,
     executed, and delivered by Parent and, assuming the enforceability against
     Buyer, will constitute the legal, valid and binding obligation of Parent,
     enforceable in accordance with its terms.

         4.3. No Violation or Conflict. The execution, delivery and performance
     of this Agreement by Parent (a) do not and will not conflict with, violate
     or constitute or result in a default under any law, judgement, order,
     decree, the memorandum of association of Parent or any contract or
     agreement to which Parent or Sellers are a party or by which Parent or
     Sellers are bound or (b) will not result in the creation or imposition of
     any lien, charge, mortgage, claim, pledge, security interest, restriction
     or encumbrance of any kind on, or liability with respect to, the Assets
     except as otherwise provided herein or otherwise disclosed on the
     Disclosure Schedule.

         4.4. No Government Restrictions. Except as required pursuant to the HSR
     Act or as otherwise contemplated by this Agreement, no consent, approval,
     order or authorisation of, or registration, declaration or filing with, any
     governmental agency is required to be obtained or made by or with respect
     to Parent in connection with the execution, delivery and performance of
     this Agreement by Parent.

         4.5. Title to Assets. Except as set forth in Section 4.5 of the
     Disclosure Schedule, Sellers have good and marketable title to all the
     Assets and will, subject to other provisions of this Agreement and the
     Disclosure Schedule, convey good and marketable title at Closing, free and
     clear of any and all liens, encumbrances, charges, claims, restrictions,
     pledges, security interests, or impositions of any kind (including those of
     secured parties). Except as set forth in Section 4.5 of the Disclosure
     Schedule, Sellers beneficially own all of the rights, title or other
     interests


                                      17
<PAGE>
 
     to be transferred to Buyer with respect to all the Assets and none of the
     Assets is leased, rented, licenced, or otherwise not owned by Sellers.
     Parent also represents that the Roche Group will not retain any copies of
     customer lists exclusively used in the Business.

         4.6. Patents. The Patents and the patents underlying the Licenced
     Patents and the patent applications underlying the Licenced Patent
     Applications have been applied for by and/or granted to BM. Except as
     disclosed on Section 4.6 of the Disclosure Schedule, to the best of
     Parent's knowledge (i) the manufacture, use or sale of the Product does not
     infringe on any other patent in any material respect which would prohibit
     the manufacture of the Product in the Territory or in Germany or the use or
     sale of the Product in the Territory; (ii) there are no claims, demands or
     proceedings instituted, pending or seriously threatened by any third party
     pertaining to or challenging BM's rights to any Patents or patents
     underlying the Licenced Patents or any patent application underlying the
     Licenced Patent Applications; (iii) Parent and Sellers are not aware of any
     facts which would render any of the Patents or patents underlying the
     Licenced Patents or any patent application underlying the Licenced Patent
     Applications, invalid or unenforceable. It is understood that a disclosure
     made in any section of the Disclosure Schedule is made solely for the
     purpose of this Agreement and does not imply any acknowledgment of Parent
     or Sellers that any third party rights exist or that the Product infringes
     any third party right.

         4.7. Trademarks. Sellers own the Trademarks set forth in Schedule 2.5
     which are formally registered or applied. All Trademark applications set
     forth in Schedule 2.5 have been duly filed and maintained. Except as
     disclosed on Section 4.7 of the Disclosure Schedule, to the best of
     Parent's knowledge (i) the use of the Trademarks for the Product in the
     Territory does not infringe on any other trademark in any material respect
     which would prohibit the use of the Trademarks for the Product in the
     Territory, and (ii) there are no claims, demands or proceedings instituted,
     pending or seriously threatened by any third party pertaining to or
     challenging Sellers' rights to any Trademark in the Territory.

         4.8. Registrations. All Registrations held by Sellers in the Territory
     are listed on Schedule 2.6. The Registrations (a) are in the name of
     Sellers, (b) constitute all licences, permits, approvals, qualifications,
     and governmental specifications, authorisations or requirements which
     Sellers have in connection with the marketing and sale of the Product in
     the Territory, and (c) to the best of Parent's knowledge, constitute all
     such licences, permits, approvals, qualifications, and governmental

                                      18
<PAGE>
 
     specifications, authorisations, and requirements necessary for the
     marketing and sale of the Product in the Territory as currently conducted
     by Sellers.

         4.9. Know-How and Know-How Licence. The Know-How and Know-How Licence
     together with the Buyer's own resources will be sufficient to permit Buyer
     (or a third party designated by Buyer) to manufacture, control, package or
     release (as applicable) the Active Ingredient or the Product to the same
     standards as Sellers currently enjoy or will enjoy as of the termination of
     the Supply Agreement.

        4.10. Inventory. As of the Closing, the Inventory shall meet the
     specifications therefor as set forth in the manufacturing documentation and
     Registrations for such Product with the competent authorities in the
     country concerned of the Territory. The Inventory will be in good
     condition, properly stored, having a minimum of 12 months of expiration
     dating from the Closing Date and in compliance with applicable laws, usable
     and saleable in the ordinary course of business.

        4.11. Taxes. As of the date hereof, there are no liens for taxes upon
     the Assets except for liens for current taxes not yet due and payable.

        4.12. Absence of Certain Changes. As of the date hereof and as of the
     Closing Date and except as set forth on Section 4.12 of the Disclosure
     Schedule, there has not been any material adverse change in the Assets or
     the Business and Parent and Sellers are not aware of any facts or
     circumstances that would have a Material Adverse Effect after Closing.

        4.13. Violations of Law. Except as set forth in Section 4.13 of the
     Disclosure Schedule or otherwise in this Agreement and the Disclosure
     Schedule, to the best of Parent's knowledge, the utilisation of the Assets
     and the conduct of the Business by Sellers (i) does not violate or conflict
     with any law, governmental specification, authorisation, or requirement, or
     any decree, judgement, order, or similar restriction in any material
     respect, or (ii) has not been the subject of an investigation or inquiry by
     any governmental agency or authority regarding violations or alleged
     violations, or found by any such agency or authority to be in violation, of
     any law, other than investigations, inquiries or findings that have not
     had, or are reasonably likely not to have, a Material Adverse Effect.

        4.14. Financial Information.

                                      19
<PAGE>
 
        4.14.1. The BM Monthly Sales Statements have been and will be accurate
     and complete in all material respects, reflect only actual bona fide
     transactions, are consistent with the accounting records of the BM Group
     legal entities, contain or will be made to contain information to enable
     Buyer to determine the nature and amounts of all deductions from gross
     sales necessary to calculate BM Net Sales, and were and will be prepared in
     a manner consistent with principles applied under U.S. generally accepted
     accounting principles (GAAP) consistently applied.

        4.14.2. None of Sellers and their Affiliates have any material
     liabilities, contingent, absolute, accrued or otherwise, relating to the
     Assets.

        4.15.   Litigation. Except as set forth on Section 4.15 of the
     Disclosure Schedule or otherwise in this Agreement and the Disclosure
     Schedule, to the best of Parent's knowledge, the Assets are not the subject
     of (i) any outstanding judgement, order, writ, injunction or decree of any
     arbitrator or administrative or governmental authority or agency, limiting,
     restricting or affecting the Assets in a way that would have a Material
     Adverse Effect, (ii) any pending or, to the best of Parent's knowledge,
     seriously threatened claim, suit, proceeding, charge, inquiry,
     investigation or action of any kind, and (iii) any court suits filed with
     respect to the Assets since 1 January 1996. Subject to other provisions of
     this Agreement, to the best of Parent's knowledge, there are no claims,
     actions, suits, proceedings or investigations pending or threatened by or
     against Sellers or Parent with respect to the transactions contemplated
     hereby, at law or in equity or before or by any federal, state, municipal
     or other governmental department, commission, board, agency,
     instrumentality or authority that would have a Material Adverse Effect.

        4.16.   Sufficiency of Assets. The Patents, Licenced Patents, Licenced
     Patent Applications, Registrations, Know-How and Know-How Licence being
     transferred to Buyer are all of the patents, licenced patents, licenced
     patent applications, registrations, know-how and know-how licences
     necessary to enable Buyer to produce the Product in the Territory.

        4.17.   Conduct of Business. Subject to applicable laws and regulations
     and the Stock Purchase Agreement, Sellers have conducted the Business in
     accordance with customary business practices and the 1997 marketing plan or
     the 1998 marketing plan, as applicable, and have taken all reasonable steps
     to maintain the Business, including reasonable incentives to maintain the
     marketing and sales personnel relating to sales of the Product in the
     United States.

                                      20
<PAGE>
 
        4.18. Retavase Business. Nothing in this Section 4 shall be construed as
     a representation or warranty by Parent with respect to the Retavase
     Business as conducted by Buyer following the Closing Date.

5.   REPRESENTATIONS AND WARRANTIES OF BUYER

         Buyer represents and warrants as follows:

         5.1. Organisation. Buyer is a corporation duly organised, validly
     existing and in good standing under the laws of the Commonwealth of
     Pennsylvania, has all corporate powers and material governmental licences,
     authorisations, permits, consents and approvals required to carry on its
     business as currently conducted and has full corporate power and authority
     to consummate the transactions contemplated hereby.

         5.2. Authority. The execution, delivery and performance of this
     Agreement by Buyer have been duly and validly authorised by all necessary
     corporate proceedings, and this Agreement has been duly authorised,
     executed, and delivered by Buyer and, assuming the enforceability against
     Parent, constitutes the legal, valid and binding obligation of Buyer,
     enforceable in accordance with its terms.

         5.3. No Violation or Conflict. The execution, delivery and the
     performance of this Agreement by Buyer do not and will not conflict with,
     violate or constitute or result in a default under any law, judgement,
     order, decree, the articles of incorporation or bylaws of Buyer, or any
     contract or agreement to which Buyer is a party or by which Buyer is bound.

         5.4. No Government Restrictions. Except as required pursuant to the HSR
     Act or as set forth in Schedule 5.4 no consent, approval, order or
     authorisation of, or registration, declaration or filing with, any
     governmental agency is required to be obtained or made by or with respect
     to Buyer in connection with the execution, delivery and performance of this
     Agreement by Buyer.

         5.5. Litigation. There are no claims, actions, suits, proceedings or
     investigations pending or, to the best of Buyer's knowledge, threatened by
     or against Buyer with respect to the transactions contemplated hereby, at
     law or in equity or before or by any federal, state, municipal or other
     governmental department, commission, board, agency, instrumentality or
     authority.

                                      21
<PAGE>
 
         5.6. Financing. Buyer has received, and furnished a copy to Parent of,
     a commitment letter signed by Buyer and Morgan Stanley & Co. Incorporated
     ("Morgan Stanley") in a form satisfactory to Parent (the "Commitment
     Letter") to provide the financing for the Purchase Price and the Commitment
     Letter is in full force and effect. Buyer shall have at Closing sufficient
     funds to pay the Purchase Price.

         5.7. Assets. Buyer is, and/or has engaged expert advisors, experienced
     in the evaluation and purchase of property and assets such as the Assets as
     contemplated hereunder. Buyer has undertaken such investigation and has
     been provided with and has evaluated such documents and information as it
     has deemed necessary to permit it to make an informed and intelligent
     decision with respect to the execution, delivery and performance of this
     Agreement. Buyer has satisfied itself that the Assets will, if transferred
     to Buyer as provided in Section 2, permit Buyer, together with the
     activities to be performed by Parent and its Affiliates pursuant to the
     Supply Agreement, the Transition Services Agreement and the resources to be
     provided by Buyer, as contemplated by Buyer's plan for the Retavase
     Business presented to the FTC, to conduct the Retavase Business immediately
     after the Closing Date.

6.   PARENT'S COVENANTS

         Parent covenants and agrees as follows:

         6.1. Maintenance of Assets/Conduct of Business. Parent agrees that from
     the date hereof until the Closing Date, except as specifically disclosed in
     Section 6.1 of the Disclosure Schedule or unless otherwise consented to by
     Buyer in writing, Parent shall, subject to applicable laws and regulations,
     use its efforts to cause Sellers to preserve the Assets and to conduct the
     Business in the ordinary course as set forth in the Stock Purchase
     Agreement. From the closing of the Stock Purchase Agreement, Parent
     undertakes as follows:

       6.1.1. except as set forth in this Agreement or disclosed on the
     Disclosure Schedule to cause Sellers and their Affiliates to maintain the
     Assets in good status and condition and not sell or dispose of any of the
     Assets except in the ordinary course of business;

       6.1.2. to cause Sellers and their Affiliates to not make or institute any
     unusual or novel methods of purchase, manufacture, sale, wholesale
     inventory build-up, management, operation, or other business practice in
     the conduct of the Business inconsistent with past practices; wholesale

                                      22
<PAGE>
 
     inventory build-up at the Closing Date shall not materially exceed two
     month's supply, except as otherwise agreed by Parent and Buyer;

       6.1.3. to cause Sellers not to enter into any material contract or
     commitment, engage in any transaction, extend credit or incur any
     obligation with respect to the Business, in each case not in the usual and
     ordinary course of business and consistent with normal business practices;
     and

       6.1.4. to inform Buyer promptly of any change in the Assets or the
     Business that would have a Material Adverse Effect.

         6.2. Compliance with Laws. Except as otherwise disclosed on the
     Disclosure Schedule, Parent shall comply or begin to remedy any non-
     compliance or cause Sellers to comply or begin to remedy, any non-
     compliance upon notification thereof in all material respects with all laws
     and orders of any court or federal, state, local or other governmental
     entity applicable to the Assets or the Business except where such that any
     non-compliance will not have a Material Adverse Effect at or after Closing.

         6.3. Access.

       6.3.1. From and after the date hereof and up to the Closing Date (except
     as otherwise provided herein) subject to applicable laws and regulations,
     Parent shall use reasonable efforts to cause Sellers to grant Buyer and its
     authorised agents, officers, and representatives access to the Assets
     during normal business hours upon reasonable prior notice and at a time and
     manner mutually agreed upon between Buyer and Parent in order to conduct
     such examination and investigation of the Assets as is reasonably
     necessary, provided that such examinations shall not unreasonably interfere
     with the operations and activities of Sellers.

       6.3.2. Parent will not, and will cause Sellers not to, disclose any
     confidential information relating to the Business to other entities of the
     Roche Group from and after the closing of the Stock Purchase Agreement up
     to the Closing Date.

         6.4. Patent Maintenance and Defence. As to any patents and patent
     applications licenced to Buyer pursuant to this Agreement, Parent shall
     assume, or cause Sellers to assume the following obligations for the
     Territory: (a) to pay all prosecution cost for any pending patent
     application; (b) to pay all maintenance fees; (c) to keep Buyer advised of
     the status of all patent documents embraced by items (a) and (b) above;

                                      23
<PAGE>
 
     (d) to advise Buyer of any actual or, to the best of Parent's knowledge,
     potential acts of infringement by any party; (e) to pursue and pay for all
     available extensions; and (f) not to abandon any patent or patent
     application underlying the Licenced Patents or Licenced Patent Applications
     without giving Buyer written notice of at least 6 (six) months in advance
     of any action toward abandonment in order for Buyer to take responsibility
     for maintenance of such patent. To the extent Buyer has a licence under
     this Agreement for a patent of Sellers, Buyer shall be solely responsible
     for the defence of any patent suit relating to the Product in the
     Territory. Buyer shall not abandon or interfere with any other aspect of
     such patents.

         6.5. Sale of Retavase by the Roche Group. During the term of the Supply
     Agreement the Roche Group will not sell any assets used by the Roche Group
     to supply Buyer with the Active Ingredient pursuant to the Supply
     Agreement. If during the one year period following commencement by Buyer or
     a third party designated by Buyer of the manufacture of the Product for
     sale in the Territory, the Roche Group desires to sell all of the assets
     relating solely to the research, development, manufacture, control,
     packaging or release, marketing or sale of the Active Ingredient and the
     Product outside the Territory to a third party, the Roche Group shall give
     written notice to Buyer that the Roche Group desires to effect such a sale.
     Buyer shall have a 30-day period in which to make an offer (the "Offer") to
     purchase all of the assets relating solely to the research, development,
     manufacture, control, packaging or release, marketing or sale of the Active
     Ingredient and the Product outside the Territory by giving a written notice
     to Parent or its Affiliate containing the proposed price and any other
     material terms prior to the expiration of such 30-day period. The Roche
     Group shall have the right in its sole discretion to accept or reject the
     Offer. In the event Parent or its Affiliate rejects the Offer, the Roche
     Group shall have the right to effect a sale of such assets to a third party
     on substantially the same or more favourable terms from the perspective of
     the Roche Group as set forth in the Offer.

         6.6. Sales Force. Parent agrees to continue the currently implemented
     stay-bonus program for the sales and marketing employees of the Business
     through the earlier of (i) April 20, 1998 or (ii) the Closing Date.

         6.7. Further Assurances. Parent shall use all reasonable efforts to
     implement the provisions of this Agreement, and for such purpose Parent, at
     the request of Buyer, at or after Closing, will, without further
     consideration, execute and deliver, or cause to be executed and delivered,

                                      24
<PAGE>
 
     to Buyer such deeds, assignments, bills of sale, consents and other
     instruments in addition to those required by this Agreement, in form and
     substance satisfactory to Buyer, as Buyer may reasonably deem necessary or
     desirable to implement any provisions of this Agreement.

         6.8. Nonassertion. Notwithstanding the other provisions of this
     Agreement, the Roche Group shall not assert or cause to be asserted against
     Buyer, the contract manufacturer of Buyer or any customer of Buyer any
     cause of action based upon infringement of any patents or patent
     applications existing as of the Closing Date or patents issuing on such
     patent applications of the Roche Group based on Buyer's conduct of the
     Business following the Closing Date. For the avoidance of doubt, nothing
     shall prevent the Roche Group or Buyer and its Affiliates from using any
     technology that is in or comes into the public domain.

         6.9. Genentech Disclosure. During the pendency of the Genetech Patent
     Suits, Parent agrees that the Roche Group (including officers, directors
     and employees of the Roche Group) will not disclose to any officer,
     director or employee of Genentech, Inc., unless compelled to disclose by
     judicial or administrative process or by other requirements of law, any
     confidential information obtained by the Roche Group in connection with the
     Corange Transaction (i) relating solely to the Business, or (ii) not
     relating solely to the Business which would disclose to Genetech, Inc. the
     application to thrombolytic drugs having essentially the same structure and
     functionality as Retavase of any of the matters or know-how licenced to
     Buyer pursuant to Section 2.16; provided that such obligation shall not
     prevent the Roche Group from disclosing, to the extent necessary, such
     confidential information to any person who is an officer, director or
     employee of F. Hoffmann-La Roche Ltd or its Affiliates who is also a
     director of Genentech, Inc. Information shall not be deemed to be
     confidential to the extent that such information (i) was in the public
     domain prior to the date of this Agreement or thereafter enters the public
     domain through no fault of the Roche Group or its representatives, (ii) was
     available to the Roche Group on a non-confidential basis, (iii) is later
     lawfully acquired by the Roche Group from sources other than the Roche
     Group or its representatives who are not subject to any legally binding
     obligation to keep such information confidential, or (iv) independently
     developed by the Roche Group.

        6.10. Control of Genentech, Inc. In the event that (i) the Amended and
     Restated Governance Agreement between Genentech, Inc. and Roche Holdings,
     Inc. dated October 25, 1995 allows the Roche Group to control Genentech,
     Inc. or (ii) the Roche Group obtains 100% of the stock of

                                      25
<PAGE>
 
         Genentech, Inc., the Roche Group shall cause to be dismissed, with
         prejudice, the Genentech Patent Suits and shall cause Genentech, Inc.
         to refrain from instituting any new litigation against Buyer as
         provided for in the Agreement Containing Consent Order.

                  6.11. Keep Well Agreement. On or prior to the Closing Date,
         Parent shall enter into a Keep Well Agreement (the "Keep Well") with
         Roche Holding Ltd in substantially the form set forth in Exhibit D.
         Parent further agrees that it shall not agree to any modification,
         amendment or termination of the Keep Well if such modification,
         amendment or termination shall have any adverse effect upon the ability
         of Parent to meet its obligations under Section 3.4 and Section 13.7 of
         this Agreement without the written consent of Buyer.

7.       BUYER'S COVENANTS

                  Buyer covenants and agrees as follows:

                  7.1. Approvals and Registrations for Transfer of Distribution
         of Products. Following Closing, Buyer shall use all reasonable efforts
         and, except as otherwise set forth herein, at its own expense obtain as
         expeditiously as possible such governmental approvals and registrations
         from the competent regulatory authorities in the Territory, as may be
         necessary with respect to the conduct of the Retavase Business by Buyer
         or its designee (other than Parent or an Affiliate of Parent).

                  7.2. Labelling. Following Closing, Buyer shall at its own
         expense and as expeditiously as possible use all reasonable efforts to
         create, and to obtain such approvals of competent government
         authorities in the Territory necessary for, Buyer's labelling for the
         Product. Buyer may use the BM Labelling on the Inventory until such
         Inventory is exhausted, subject to applicable laws and regulations in
         the Territory. In addition, Buyer may, subject to applicable laws of
         the relevant countries of the Territory, use the BM Labelling on each
         Product manufactured by Parent or its Affiliates (including without
         limitation the BM Group companies) for Buyer until the competent
         authority approves Buyer's Labelling for use on the Product and Buyer,
         using all efforts, has obtained sufficient supplies of materials with
         Buyer's Labelling for use on such Product. Buyer may, however, use the
         BM Labelling only in connection with clearly identifying Buyer as the
         responsible person for commercialising the Product in a way approved in
         advance by Parent, such approval not to be unreasonably withheld. All
         expenses incurred by Buyer




                                      26
<PAGE>
 
         in connection with Buyer's labelling and package design of the Product
         shall be solely for the account of Buyer.

                  7.3. References to Parent. Other than as set forth in Section
         7.2 above, any reference to Parent or its Affiliates (including without
         limitation the BM Group companies) or any use of the trademarks,
         tradenames, or logos of Parent or its Affiliates (including without
         limitation the BM Group companies) by Buyer in connection with the
         Product after Closing must be approved by Parent in writing prior to
         such use unless otherwise required by law or regulation; provided that
         Buyer may refer to Sellers to the extent necessary to identify Sellers
         as having previously sold the Product in the Territory. It is
         understood that the Trademarks do not fall under this provision.

                  7.4. Further Assurances. Buyer shall use all reasonable
         efforts to implement the provisions of this Agreement, and for such
         purpose Buyer, at the request of Parent, at or after Closing, will,
         without further consideration, execute and deliver, or cause to be
         executed and delivered, to Parent such consents and other instruments
         in addition to those required by this Agreement, in form and substance
         satisfactory to Parent, as Parent may reasonably deem necessary or
         desirable to implement any provision of this Agreement.

                  7.5. Financing. Buyer agrees to use its best efforts to
         complete the financing referred to in Section 5.6 including, without
         limitation, to (i) perform all of Buyer's obligations under the
         Commitment Letter; (ii) take all actions necessary to cause the
         conditions under the Commitment Letter to be satisfied; (iii) not take
         any action which would be reasonably expected to cause such conditions
         not to be satisfied; (iv) not amend or waive any provision of the
         Commitment Letter without the prior written consent of Parent and (v)
         enforce its rights against Morgan Stanley & Co. Incorporated under the
         Commitment Letter.

                  7.6. Notification. If at any time Buyer becomes aware of any
         facts or circumstances which would be reasonably likely to result in a
         failure of any condition to Morgan Stanley's obligations under the
         Commitment Letter, Buyer shall promptly notify Parent in writing
         describing the same in reasonable detail.





                                      27
<PAGE>
 
8.       COVENANTS BY BUYER AND PARENT

                  Buyer and Parent covenant and agree as follows:

                  8.1. Assignment of Patents and Trademarks. By or before
         Closing, Buyer and Parent shall prepare in good faith an assignment
         pursuant to which Sellers agree the Patents and Trademarks shall be
         assigned to Buyer. Following Closing, Buyer shall prepare and Sellers
         shall execute such documents as Buyer may reasonably request in order
         to assign and record the assignment of the Patents and Trademarks. The
         responsibility and expense of preparing and filing such documents and
         any actions required ancillary thereto, shall be borne solely by Buyer.
         Notwithstanding anything contained elsewhere herein, Buyer shall hold
         Parent and its Affiliates (including without limitation the BM Group
         companies) harmless from and against any loss or damage, including but
         not limited to fees, penalties, fines or third party claims, due to
         Buyer's failure to record any assignment of any such Patents or
         Trademarks pursuant to this Section 8.1, except if such loss or damage
         is solely due to the conduct of Parent (including without limitation
         the BM Group companies).

                  Neither Parent nor any of its Affiliates (including without
         limitation the BM Group companies) shall be obliged to maintain any
         Trademark after the Closing. Parent will pay or cause to be paid any
         fees for renewals of any of the Trademarks as were initiated prior to
         the Closing. All other renewal and maintenance fees as well as the cost
         and expenses for defending the Trademarks against infringements by
         third parties occurring after the Closing Date shall be paid by Buyer.
         Parent will arrange for the files relating to the Trademarks to be
         handed over to Buyer without delay after the Closing. Until the
         termination of the Transition Services Agreement, Parent will promptly
         notify Buyer of any infringement or threatened infringement of any of
         the Trademarks coming to its attention and will, if the registration of
         any of the Trademarks is still in the name of Sellers, at the expense
         of Buyer take such action against the infringer as Buyer may reasonably
         request to restrain such infringement, or alternatively authorise Buyer
         or its nominee to take such action in its own name. In the latter
         event, Parent or its Affiliates will at Buyer's expense provide
         reasonable assistance to Buyer.

                  8.2. Assignment of Registrations. Parent and Buyer shall
         cooperate to ensure that the Registrations shall be assigned to Buyer,
         except where such assignment may be prohibited by law. At or following
         Closing, Buyer shall prepare and Sellers shall execute such documents
         as




                                      28
<PAGE>
 
         Buyer may reasonably request in order to record the assignment of the
         Registrations. The responsibility and expense of preparing and filing
         such documents and any actions required ancillary thereto shall be
         borne solely by Buyer. In addition, Buyer shall pay any user fees
         associated with any Product that accrues after Closing but prior to
         transfer of such Registration. Notwithstanding anything contained
         elsewhere herein, Buyer shall hold Parent and its Affiliates (including
         without limitation the BM Group companies) harmless from and against
         any loss or damage, including but not limited to fees, penalties, fines
         or third party claims, due primarily to Buyer's failure to record any
         assignment of any such Registrations pursuant to this Section, except
         if such loss or damage is due primarily to the conduct of Parent and
         its Affiliates (including without limitation the BM Group companies).

                  8.3. Clinical Studies Transfer. Parent and Sellers shall
         complete ongoing clinical studies which are scheduled to be completed
         within two (2) months from the Closing Date and following completion
         shall provide electronic copies of the relevant Clinical Data and all
         reports relating to such clinical studies to Buyer. Ongoing clinical
         studies scheduled to be completed after two (2) months from the Closing
         Date shall be transferred to Buyer. Parent and Buyer shall cooperate in
         the transfer of such studies and all other materials related thereto.

                  8.4. Access to Information. Buyer and Parent will, upon
         reasonable prior notice, make available to the other, to the extent
         reasonably required for the purpose of assisting Parent or Buyer in
         obtaining governmental approvals and preparation of tax returns or
         other filings required by law or regulation relating to the Assets, and
         prosecuting or defending or preparing for the prosecution or defence of
         any action, suit, claim, complaint, proceeding or investigation at any
         time brought by or pending against Parent or any of its Affiliates
         (including without limitation the BM Group companies) or Buyer relating
         to the Assets or the Supply Agreement, other than in the case of
         litigation between the parties hereto, such information or records (or
         copies thereof) in their possession after Closing.

                  8.5. Press Releases. Except as required by applicable law,
         neither Parent nor Buyer, nor any Affiliate thereof, will issue or
         cause publication of any press release or other announcement or public
         communication with respect to this Agreement or the transactions
         contemplated hereby without the prior written consent of the other
         party, which consent will not be unreasonably withheld or delayed. To
         the extent that any announcement is




                                      29
<PAGE>
 
         required by applicable law, Parent and Buyer shall consult with each
         other in good faith prior to such announcement.

                  8.6. Customer Information. Buyer jointly with Parent or their
         relevant Affiliates shall be entitled and obliged to announce to the
         clients in the Territory, the transfer of the Business to Buyer or its
         relevant Affiliate.

                  8.7. Hospital and Other Purchasing Contracts. Buyer and Parent
         shall take such actions as are reasonably necessary to cause the
         assignment to Buyer of hospital and other health services provider
         purchasing contracts for the purchase of the Product. Those contracts,
         if any, that relate to the purchase of the Product as well as other
         products shall be terminated by Sellers with respect to the Product as
         soon as practicable after closing so as to allow Buyer to enter into
         new contracts with respect to the Product.

                  8.8.   Reconciliation with the Agreement Containing Consent
         Order; Canadian Filings.

                  8.8.1. If required by the FTC, Parent and Buyer will cooperate
         with one another and will negotiate in good faith to amend any
         provision of this Agreement to the extent necessary to make the
         provisions hereof consistent with the Agreement Containing Consent
         Order; provided that no such amendment shall be required to be made
         unless it is acceptable to Buyer and Parent.

                  8.8.2. The parties hereto shall promptly make or cause to be
         made all filings required or deemed advisable under the Competition Act
         (Canada). If required by law, the transaction contemplated by this
         Agreement is contingent upon (i) the issuance under section 102 of the
         Competition Act (Canada) of an Advance Ruling Certificate or (ii) the
         expiry of the waiting period under section 123 of the Competition Act
         (Canada) and receipt of advice in writing by the Director that he has
         determined not to make an application for an order under section 92 or
         100 of the Competition Act (Canada) or to commence an inquiry under
         section 10 of the Competition Act (Canada). The transaction
         contemplated by this Agreement is further contingent upon completion of
         any filings and obtaining of any approvals under the Investment Canada
         Act if required.

                  8.9.   Genentech Patent Suits.





                                      30
<PAGE>
 
                  8.9.1. Buyer covenants that, immediately upon Closing, Buyer
         will undertake, in good faith, control of the full and complete defence
         of the Genentech Patent Suits. Parent represents and Buyer acknowledges
         that the Assets to be transferred to Buyer pursuant to this Agreement
         include all assets that are currently utilised by BM in its defence of
         the Genentech Patent Suits, to the extent such assets are owned by the
         BM Group at Closing. Buyer undertakes in good faith to not abandon or
         make any concessions in the defence of the Genentech Patent Suits in
         Germany which affects the ability of Parent or any of its Affiliates
         (including without limitation the BM Group companies) to manufacture or
         sell the Active Ingredient or the Product or any product made therewith
         outside the Territory or any other product or research or development
         project in or outside the Territory. Buyer shall retransfer control of
         defence of the Genentech Patent Suits in Germany immediately upon
         commencement by Buyer of the manufacture of the Product outside Germany
         in the event such suits are still pending at that time.

                  8.9.2. Parent undertakes that during the pendency of the
         Genentech Patent Suits (or any appeals relating to such suits), Parent
         will take all steps to make available to Buyer (i) such employees of
         the Roche Group that are knowledgeable with respect to the matters at
         issue in the Genentech Patent Suits (including without limitation the
         BM Group companies) and (ii) such relevant files of the BM Group (which
         exist as of the Closing Date and which Parent undertakes to preserve)
         that Buyer may reasonably require in connection with the defence of the
         Genentech Patent Suits for such period of time as may be reasonably
         required by Buyer. In particular, Parent agrees that with respect to
         Stefan Fischer, Ulrich Konert, Anne Stern, Siegfried Schreiner, and
         Claus-Jorg Rutsch, Parent will ensure that, for such period of time as
         such individuals are employed by the Roche Group, the availability of
         such individuals to Buyer in connection with the Genentech Patent Suits
         shall not be interfered with by reason of their employment with the
         Roche Group. In addition, to the extent that such individuals are not
         employed by the Roche Group, Buyer or its Affiliates, Parent shall pay
         all reasonable direct out-of-pocket expenses (and reasonable fees, if
         permissible) of any such individual who participates in the defence of
         the Genentech Patent Suits incurred in connection therewith. Parent
         further agrees that it will take no adverse action against any employee
         of the Roche Group based on such employee's provision of assistance or
         information to Buyer pursuant to this Section 8.9.2. Parent also agrees
         that, to the extent relevant and necessary, it will not enforce any
         confidentiality agreement against an employee of the Roche Group that
         would otherwise prevent or hinder such





                                      31
<PAGE>
 
         employee from cooperating with or providing information to Buyer
         pursuant to this Section 8.9.2.

                  8.10. Transition Services. On or prior to the Closing Date,
         Buyer and Parent or their Affiliates shall enter into the Transition
         Services Agreement substantially in the form attached as Exhibit A
         hereto.

                  8.11. Returns. For a period of two years following the Closing
         Date, Sellers shall be responsible for all returns of the Product
         within the Territory with respect to lot numbers shipped prior to the
         Closing Date, provided that following the Closing Date, Buyer shall not
         engage in any action (other than pricing of the Product) to induce any
         purchaser of the Product to return Product sold prior to the Closing
         Date; provided, however, that to the extent returns of Product result
         from changes in pricing by Buyer, Buyer shall be responsible for such
         returns. For Product shipped after the Closing Date, Buyer shall be
         responsible for all returns of the Product within the Territory.

                  8.12. Chargebacks and Rebates. Sellers shall be responsible
         for all chargebacks and rebates which are reported within 60 days
         following the Closing Date. Buyer shall be responsible for all
         chargebacks and rebates which are reported after 60 days following the
         Closing Date.

                  8.13. Confidentiality. The Confidentiality Agreement (the
         "Confidentiality Agreement") between F. Hoffman-La Roche Ltd and Buyer
         dated as of October 14, 1997, as it applies to Parent and its
         Affiliates, is hereby incorporated by reference into this Agreement.

                  8.14. Consents. Each of Parent, Sellers and Buyer agree to
         cooperate in good faith to obtain any consents from third parties
         relating to the assignment of existing contracts.

                  8.15. Cooperation on Safety Reports. Following the Closing
         Date for so long as Sellers and Buyer continue to market the Product,
         each of Sellers and Buyer agree promptly to provide the other party
         with all information received by it in connection with the occurrence
         of serious or unexpected events relating to the Product.

                  8.16. Manufacturing Improvements. Parent agrees that if,
         during the term of the Supply Agreement, the Roche Group implements any
         improvement in the manufacturing technology and know-how used in the
         manufacture of the Active Ingredient or the Product, it shall grant to
         Buyer a perpetual, paid-up, irrevocable, royalty-free, non-exclusive
         licence, with





                                      32
<PAGE>
 
         right to sub-licence, any such improvement for use in manufacture of
         the Active Ingredient or the Product for sale in the Territory.

                  Buyer agrees that if, during the term of the Supply Agreement,
         Buyer or its assignee implements any improvement in the manufacturing
         technology and know-how used in the manufacture of the Active
         Ingredient or the Product, it shall grant to the Roche Group a
         perpetual, paid-up, irrevocable, royalty-free, non-exclusive licence,
         with right to sub-licence, any such improvement for use in manufacture
         of the Active Ingredient or the Product for sale outside the Territory.

                  8.17. Importation. Each of Parent and Buyer agrees that,
         subject to applicable law, it will not actively support the importation
         of the Product into the Territory in the case of Parent and Sellers and
         outside the Territory in the case of Buyer.

                  8.18. Product Recall; Product Liability. Parent and Buyer
         agree that in the event prior to the Closing Date of a major recall of
         the Product or the occurrence of material product liability issues in
         connection therewith which affect the viability of the Business, Parent
         and Buyer will negotiate in good faith with respect to an adjustment of
         the Purchase Price.

                  8.19. Confirmation of Financing. Upon the written request by
         Parent at any time and from time to time, (a) Buyer shall use its best
         efforts to obtain (and deliver to Parent within 5 business days after
         such request) a waiver by Morgan Stanley in the form set forth in
         Exhibit C hereto, in favor of Buyer, of any right to terminate the
         Commitment Letter or to assert that any condition to Morgan Stanley's
         obligations under the Commitment Letter has not been satisfied at the
         time of such waiver, based upon facts and circumstances at the time of
         such waiver which are publicly known or, after due inquiry by Morgan
         Stanley, known to Morgan Stanley and (b) in the event Morgan Stanley
         fails or refuses to provide such waiver within such period, Buyer shall
         deliver to Parent within 6 business days after such request a full
         written explanation of such failure or refusal and the reasons
         therefor.

9.       MANUFACTURING

                  9.1. Supply Agreement. Consistent with the terms of the
         Agreement Containing Consent Order, on or prior to the Closing Date,
         Parent and Buyer or their Affiliates shall enter into the Supply
         Agreement for the supply of the Product (as that term is defined in
         Section 1.3 of the Supply Agreement) substantially in the form attached
         hereto as Exhibit B.




                                      33
<PAGE>
 
                  9.2.  Parent's Representations and Warranties for its
         Supplies. As provided in the Supply Agreement:

                  Parent shall make representations and warranties to Buyer that
         the bulk labelled lyophilized vials or bulk Active Ingredient that is
         manufactured by the Roche Group (including without limitation the BM
         Group companies) for Buyer pursuant to the Supply Agreement meets the
         FDA and DHC approved specifications therefor. Parent shall agree to
         indemnify, defend and hold Buyer harmless from any and all suits,
         claims, actions, demands, liabilities, expenses or losses that may be
         alleged to result from the failure of the bulk labelled lyophilized
         vials or bulk Active Ingredient manufactured by the Roche Group for
         Buyer pursuant to the Supply Agreement to meet FDA and DHC
         specifications. This obligation shall be contingent upon Buyer giving
         Parent prompt, adequate notice of such claim, cooperating fully in the
         defence of such claim, and permitting Parent to assume the sole control
         of all phases of the defence and/or settlement of such claim, including
         the selection of counsel. This obligation shall not require Parent to
         be liable for any negligent act or omission of Buyer or for any
         representations and warranties, express or implied, made by the Buyer
         that exceed the representations and warranties made by Parent to Buyer.

                  9.3.  Technology Transfer. To the extent Buyer undertakes the
         manufacture of the Product in the Territory and subject to the
         obligations under the Supply Agreement, upon reasonable notice and
         request from Buyer, the Roche Group (including without limitation the
         BM Group companies) shall provide to Buyer or a third party contract
         manufacturer designated by Buyer in a timely manner: (a) for a period
         not to exceed four years following the Closing Date, assistance and
         advice to enable Buyer or a third party contract manufacturer
         designated by Buyer to obtain all necessary approvals to manufacture
         the Product for sale in the Territory; (b) for a period not to exceed
         one (1) year from the date of such approvals, assistance to enable
         Buyer or a third party contract manufacturer designated by Buyer to
         manufacture the Product in substantially the same manner and quality
         employed or achieved by Sellers as of the date Buyer obtains such
         approvals; and (c) until the date of such approvals (or earlier if
         Buyer abandons its efforts to obtain such approvals), consultation with
         knowledgeable employees of the Roche Group and training at the request
         of and at the manufacturing facility of Buyer or a third party contract
         manufacturer designated by Buyer (or of the Buyer's choosing),
         sufficient to satisfy the management of Buyer that its personnel (or
         the personnel of a third party contract manufacturer

                                      34
<PAGE>
 
         designated by Buyer) are adequately trained in the manufacture of the
         Product for sale in the Territory. Such assistance shall include
         on-site inspections, at Buyer's request, of the facility that is
         producing the Active Ingredient for supply under the Supply Agreement.
         Parent shall be entitled to reimbursement from Buyer for all the Roche
         Group's direct out-of-pocket expenses incurred in providing the
         services and assistance described above. Buyer shall be responsible for
         the construction of the facilities associated with the manufacture of
         the Product.

              9.4.   Approvals. In the manner and form required by the Agreement
         Containing Consent Order, Buyer shall submit to the FTC a certification
         attesting to the good faith intention of Buyer, including a plan of
         Buyer, to obtain in an expeditious manner all necessary approvals to
         manufacture the Product for sale in the Territory. Furthermore, in
         accordance with the terms of the Agreement Containing Consent Order,
         Buyer shall submit to the trustee appointed pursuant to the Agreement
         Containing Consent Order, periodic verified written reports setting
         forth in detail the efforts of Buyer to sell the Product obtained
         pursuant to the Supply Agreement in the United States and to obtain all
         approvals necessary to manufacture the Product for sale in the
         Territory. The first such report shall be submitted within sixty (60)
         days from the date this Agreement is approved by the FTC and every
         ninety (90) days thereafter until all necessary approvals are obtained
         by Buyer for manufacturer of the Product for sale in the Territory.
         Buyer shall also report to the FTC and the trustee referred to above
         within ten (10) days of its ceasing the sale in the United States of
         the Product obtained pursuant to the Supply Agreement for any time
         period exceeding sixty (60) days or abandoning its efforts to obtain
         all necessary approvals to manufacture the Product for sale in the
         Territory.

10.      CONDITIONS PRECEDENT TO CLOSING

             10.1.   Conditions to Obligations of Buyer and Parent. The
         obligations of Buyer and Parent to complete the transactions
         contemplated hereby are subject to the satisfaction on or prior to the
         Closing Date of the following conditions:

             10.1.1. No provision of any applicable law or regulation and no
         judgement, injunction, order or decree shall prohibit the consummation
         of the Closing.

             10.1.2. Agreement Containing Consent Order. The Agreement
         Containing Consent Order (in the form provided to Buyer) shall have
         been

                                      35
<PAGE>
 
         accepted for public comment by the FTC, and the transactions
         contemplated by this Agreement shall be permitted under the terms of
         the Agreement Containing Consent Order.

             10.1.3.  To the extent required by law or as deemed advisable by
         the parties, an Advance Ruling Certificate under section 102 of the
         Competition Act (Canada) shall have been issued for the transaction
         contemplated by this Agreement or the waiting period under section 123
         of the Competition Act (Canada) shall have been expired and advice in
         writing by the Director shall have been received that he has determined
         not to make an application for an order under section 92 or 100 of the
         Competition Act (Canada) or to commence an inquiry under section 10 of
         the Competition Act (Canada) and the transaction contemplated by this
         Agreement shall have obtained of any approvals under the Investment
         Canada Act if required; provided that if all other conditions shall
         have been satisfied, Parent and Buyer agree to close that portion of
         the transaction pertaining to the United States prior to the
         satisfaction of the conditions set forth in this Section and to close
         that portion of the transaction pertaining to Canada at such later
         date, and on terms and conditions, as mutually agreed.

             10.1.4.  The Corange Transaction shall have been consummated in
         accordance with the terms of the Stock Purchase Agreement.

             10.1.5.  Any applicable waiting period under the HSR Act relating
         to the transactions contemplated hereby shall have expired or been
         terminated.

             10.2.    Conditions to Obligations of Buyer. The obligation of
         Buyer to complete the transactions contemplated hereby is subject to
         the satisfaction on or prior to the Closing Date of the following
         conditions (all or any of which may be waived in whole or in part by
         Buyer);

             10.2.1.  Representations and Warranties. The representations and
         warranties made by Parent in this Agreement shall have been true and
         correct (without regard to materiality or Material Adverse Effect
         qualifications set forth therein) as of the Closing Date with the same
         force and effect as though said representations and warranties had been
         made on the Closing Date, except for representations and warranties
         made as of a specified date, which will be true and correct in all
         respects as of the specified date, and except for breaches of any such
         representations or warranties that would not have, individually or in
         the aggregate, a Material Adverse Effect. Each Seller shall have
         delivered to Buyer at Closing a

                                      36
<PAGE>
 
         representation and warranty that each of Parent's representations and
         warranties in Section 4 with respect to such Seller were true and
         correct as of the date thereof, and such representation and warranty
         shall be true and correct as of the Closing Date except for breaches
         that would not have, individually or in the aggregate, a Material
         Adverse Effect.

             10.2.2.  Performance. Parent shall have performed and complied in
         all material respects with all agreements, obligations and conditions
         required by this Agreement to be so performed or complied with by it
         prior to or at Closing.

             10.3.    Conditions to Obligations of Parent. The obligation of
         Parent to complete the transactions contemplated hereby is subject to
         the satisfaction on or prior to the Closing Date of the following
         conditions (all or any of which may be waived in whole or in part by
         Parent):

             10.3.1.  Representations and Warranties. The representations and
         warranties made by Buyer in this Agreement shall have been true and
         correct in all material respects as of the Closing Date with the same
         force and effect as though said representations and warranties had been
         made on the Closing Date (except for representations and warranties
         made as of a specified date, which will be true and correct in all
         respects as of the specified date).

             10.3.2.  Performance. Buyer shall have performed and complied in
         all material respect with all agreements, obligations and conditions
         required by this Agreement to be so performed or complied with by it
         prior to or at Closing.

                                      37
<PAGE>
 
11.      THE CLOSING

            11.1.   The Closing. Subject to the satisfaction of all of the
         conditions to each party's obligations set forth in Section 10 hereof
         (or, with respect to any condition not satisfied, the waiver in writing
         thereof by the party or parties for whose benefit the condition exists)
         and subject to Section 12.1.2, the closing of the transactions
         contemplated by this Agreement (the "Closing") shall take place at 9
         a.m. (local time) on the first business day which is at least 30 days
         following public announcement of this Agreement (assuming the last
         condition precedent under Section 10 herein above has been fulfilled)
         or earlier or later, if mutually agreed by the parties, in accordance
         with the Agreement Containing Consent Order and any applicable law or
         regulation (the "Closing Date") at the offices of Parent in Hamilton,
         Bermuda. The transfer of the Assets shall be deemed to have occurred as
         of 0.01 a.m. of the Closing Date.

            11.2.   Deliveries by Parent.  At Closing, Parent shall deliver or
         cause to be delivered to Buyer:

            11.2.1. the conveyance, assignment, and assumption agreement with
         respect to the Assets and the Assumed Agreements and all obligations
         and responsibilities associated therewith;

            11.2.2. the assignments of the Patents and Trademarks as set forth
         in Section 8.1;

            11.2.3. the assignments of the Registrations as set forth in Section
         8.2;

            11.2.4. the Supply Agreement;

            11.2.5. the Transition Services Agreement;

            11.2.6. the Inventory and the statement of the quantity of the
         Inventory as set forth in Section 2.12;

            11.2.7. to the extent available and practicable, hard copies of the
         documents as set forth in Section 2 herein above; all such documents,
         which cannot be delivered to Buyer at Closing, shall be delivered by
         Parent to Buyer as soon as practicable after Closing;

            11.2.8. except as otherwise provided herein, such agreements,
         licences, notices, and authorisations as may be necessary and
         sufficient to

                                      38
<PAGE>
 
         permit Buyer to use or operate under the Registrations (if legally
         permissible) and Know-How and that Buyer has requested from Parent;

             11.2.9.   a receipt for the Purchase Price; and

             11.2.10.  the licences or sublicences set forth in Sections 2.2,
         2.3, 2.7, 2.8 and 2.16.

             11.3.     Deliveries by Buyer. At Closing, Buyer shall deliver or
         cause to be delivered to Parent:

             11.3.1.   the Purchase Price payable in accordance with Section
         3.1; and

             11.3.2.   the conveyance, assignment and assumption agreement with
         respect to the Assets and the Assumed Agreements and all obligations
         and responsibilities associated therewith;

             11.3.3.   the Supply Agreement; and

             11.3.4.   the Transition Services Agreement;

             11.4.     Effects of Closing. Upon Closing the ownership of the
         Assets as well as the full responsibility for the use of the Assets and
         the conduct of the Business comprising the use of the Assets shall pass
         from Sellers to Buyer. Sellers shall remain exclusively responsible for
         the conduct of the Business prior to Closing (including any
         consequences therefrom which may appear after the Closing). Buyer shall
         be exclusively responsible for the conduct of the Retavase Business
         from Closing. Buyer acknowledges that as per the Closing the product
         liability insurance of Sellers will terminate on the Closing Date and
         Buyer shall be responsible for proper insurance of the product
         liability and other risks relating to the Retavase Business. The
         Closing shall further have the other effects provided for in this
         Agreement.

12.      TERMINATION

             12.1.     Termination.  This Agreement and the transactions
         contemplated hereby may be terminated at any time prior to the Closing
         Date:

             12.1.1.   By the mutual written consent of Parent and Buyer;

                                      39
<PAGE>
 
             12.1.2.   By either Parent or Buyer if Closing shall not have
         occurred on or before April 20, 1998; or

             12.1.3.   By either Parent or Buyer if consummation of the
         transactions contemplated hereby shall violate any non-appealable final
         order, decree or judgement of any court or governmental body having
         competent jurisdiction.

             12.1.4.   By either Parent or Buyer if there has been a material
         violation or breach by the other party of any of the agreements,
         representations or warranties contained in this Agreement that has not
         been waived in writing, or if there has been a material failure of
         satisfaction of a condition to the obligations of the other party that
         has not been waived in writing, and such violation, breach, or failure
         has not been cured within fifteen (15) days (but in no event later than
         April 20, 1998) of written notice to the other party; or

             12.2.     Effect of Termination. If this Agreement is terminated
         pursuant to this Section 12, all obligations of Parent and Buyer under
         this Agreement shall terminate without further liability of Parent or
         Buyer except (a) for the obligations of Buyer and Parent under Sections
         8.13, 15, and 16.2; and (b) that such termination shall not constitute
         a waiver by any party of any claim it may have for damages caused by
         reason of a breach by the other party of a representation, warranty,
         covenant or agreement.

             12.3.     Termination by the FTC. (a) As set forth in Paragraph
         II.B.9 of the Agreement Containing Consent Order, the FTC may terminate
         this Agreement if Buyer: (i) voluntarily ceases for sixty (60) days or
         more the sale in the United States of, or otherwise fails to pursue
         good faith efforts to sell, the Product obtained pursuant to the Supply
         Agreement prior to obtaining all necessary FDA approvals to manufacture
         its own Product for sale in the United States; (ii) fails to pursue
         good faith efforts to obtain all necessary FDA approvals to
         manufacture, or have manufactured by third parties other than Parent or
         its Affiliates, its own Product for sale in the United States; or (iii)
         fails to obtain all such FDA approvals within four (4) years from the
         date the FTC grants final approval to the Agreement Containing Consent
         Order; provided, however, that this time period may be extended as
         provided in Paragraph II.B.9 of the Agreement Containing Consent Order.
         If this Agreement is terminated in accordance with the provisions of
         this section, the Assets shall revert back to Sellers and shall be
         divested in the manner provided in Paragraph IV of the Agreement
         Containing Consent Order.

                                      40
<PAGE>
 
                  (b)   In the event the FTC withdraws its acceptance of the
         Agreement Containing Consent Order after expiration of the sixty (60)
         day public comment period referred to in paragraph 4 of the Agreement
         Containing Consent Order, this Agreement shall forthwith become null
         and void and the Buyer shall immediately transfer back to Sellers all
         assets, properties and rights conveyed to it hereunder and, upon
         receipt of said assets, properties and rights, Sellers shall pay to
         Buyer the Purchase Price. Buyer agrees that (i) during the pendency of
         the sixty (60) day public comment period it shall, subject to its sale
         of inventory purchased under the Supply Agreement, preserve intact all
         assets, properties and rights conveyed to it hereunder and shall take
         no action that would individually or in the aggregate have a material
         adverse effect on those assets and (ii) Buyer and its Affiliates will
         not disclose any confidential information concerning the Retavase
         Business; provided that information shall not be deemed to be
         confidential that Buyer can prove (A) was in the public domain prior to
         the date of this Agreement or thereafter enters the public domain
         through no fault of Buyer, its Affiliates or their respective
         representatives, (B) was available to Buyer on a non-confidential basis
         prior to its disclosure to Buyer by Parent, Sellers, their Affiliates
         or their respective representatives, (C) is later lawfully acquired by
         Buyer from sources other than Parent, Sellers, their Affiliates or
         their respective representatives who are not, to the best of knowledge
         of Buyer, subject to any legally binding obligation to keep such
         information confidential, or (D) independently developed by Buyer
         without reference to confidential information covered hereunder.

13.      SURVIVAL; REMEDIES; CLAIMS; INDEMNIFICATION

                13.1.   Remedy for Breach. After the Closing, the sole and
         exclusive remedy of Buyer and Parent for any breach or inaccuracy of
         any representation or warranty under this Agreement by the other party
         hereto or by Sellers shall be the remedies contained in this Section 13
         and shall be enforceable only as provided in Section 15.1. Any claims
         that a party may have arising out of the other party's or Sellers'
         breach of its representations and warranties hereunder shall be
         notified to the other party no later than 12 (twelve) months following
         Closing (without affecting either party's right to start arbitration
         proceedings in accordance with Section 15.1 thereafter if the
         notification for the pertaining matter has been given prior to the
         expiration of such 12 month period). Parent and Buyer agree to use all
         reasonable efforts to mitigate any loss or damage for which they may
         seek a remedy under this Article 13.

                13.2.   Indemnification by Parent.

                                      41
<PAGE>
 
                13.2.1. Claims. Subject to the limitations set forth in Section
         13.2.2, Parent shall indemnify Buyer and its Affiliates against and
         agrees to hold Buyer and its Affiliates harmless from any and all
         damage, loss, liability, third party claims, and expense (collectively,
         "Damages") (including, without limitation, reasonable expenses of
         investigation and attorneys' fees and expenses in connection with any
         action, suit or proceeding brought against Buyer or its Affiliates)
         incurred or suffered by Buyer or its Affiliates arising out of (a) any
         breach of a representation or warranty or covenant made by Parent or
         Sellers herein, (b) the maintenance of the Assets by Sellers prior to
         Closing or (c) the conduct of the Business by Parent or its Affiliates
         prior to Closing (collectively, "Indemnifiable Claims").

                13.2.2. Limitations. Notwithstanding anything to the contrary
         set forth elsewhere herein, Buyer and its Affiliates shall not be
         entitled to indemnification hereunder with respect to any Indemnifiable
         Claim for breaches of representations and warranties asserted pursuant
         to Section 13.2.1(a) unless the amount of Damages with respect to such
         Indemnifiable Claim exceeds US$500,000. However, Parent shall in no
         event be required to pay Buyer and its Affiliates more than 33% of the
         Purchase Price in respect of aggregate Damages for Indemnifiable Claims
         for breaches of representations and warranties asserted pursuant to
         Section 13.2.1(a).

                13.3.   Indemnification by Buyer. Buyer shall indemnify Parent
         and its Affiliates (including without limitation the BM Group
         companies) against and agrees to hold Parent and its Affiliates
         harmless from any and all Damages (including without limitation
         reasonable expenses of investigation and attorneys' fees and expenses
         in connection with any action, suit or proceeding brought against
         Parent or its Affiliates) incurred or suffered by Parent or its
         Affiliates arising out of (a) any breach of a representation or
         warranty or covenant made by Buyer herein; (b) the conduct of the
         Retavase Business by Buyer and its Affiliates from Closing or (c) the
         use of the licences granted pursuant to Section 2.16 of this Agreement
         (collectively, "Indemnifiable Claims"). Notwithstanding anything to the
         contrary set forth elsewhere herein, Parent and its Affiliates shall
         not be entitled to indemnification hereunder with respect to any
         Indemnifiable Claim for breaches of representations and warranties
         asserted pursuant to this Section 13.3 unless the amount of Damages
         with respect to such Indemnifiable Claim exceeds US$ 500,000, provided
         that such limitation shall not apply to a breach by Buyer in connection
         with Buyer's obligations pursuant to Sections 3.1 and 3.3.

                                      42
<PAGE>
 
                13.4.   Notice. A party seeking indemnification or to be held
         harmless pursuant to Section 13.2 or 13.3 (an "Indemnified Party")
         shall give prompt notice to the party from whom such relief is sought
         (the "Indemnifying Party") of the assertion of any claim, or the
         commencement of any action, suit or proceeding, in respect of which
         relief is or may be sought hereunder (whether or not the limits set
         forth in Section 13.2.2 and Section 13.3 have been exceeded) and will
         give the Indemnifying Party such information with respect thereto as
         the Indemnifying Party may reasonably request, but failure to give such
         notice shall not relieve the Indemnifying Party of any liability
         hereunder (except to the extent the Indemnifying Party has suffered
         actual prejudice thereby).

                13.5.   Participation in Defence. The Indemnifying Party may, at
         its expense, participate in or assume the defence of any such action,
         suit or proceeding involving a third party. In such case the
         Indemnified party shall have the right (but not the duty) to
         participate in the defence thereof, and to employ counsel, at its own
         expense, separate from counsel employed by the Indemnifying Party in
         any such action and to participate in the defence thereof. The
         Indemnifying Party shall be liable for the fees and expenses of one
         firm as counsel (and appropriate local counsel) employed by the
         Indemnified Party if the Indemnifying Party has not assumed the defence
         thereof. Whether or not the Indemnifying Party chooses to defend or
         prosecute any claim involving a third party, all the parties hereto
         shall, and shall cause their respective Affiliates to, cooperate in the
         defence or prosecution thereof and shall furnish, or cause to be
         furnished, such records, information and testimony, and attend such
         conferences, discovery proceedings, hearings, trials and appeals, as
         may be reasonably requested in connection therewith.

                13.6.   Settlements. The Indemnifying Party shall not be liable
         under this Section for any settlement effected without its consent of
         any claim, litigation or proceedings in respect of which relief may be
         sought hereunder, unless the Indemnifying Party refuses to acknowledge
         liability for indemnifying or holding the Indemnified Party harmless
         under this Section 13 and/or declines to defend the Indemnified Party
         in such claim, litigation or proceeding.

                13.7.   Other Claims. In the event that any third party
         (including Genentech) commences (in the Territory or in Germany) a
         patent infringement action (with respect to a patent that has been
         issued or a patent application that has been published as of the date
         hereof) with respect to the Product in the Territory, Buyer shall be
         solely responsible

                                      43
<PAGE>
 
         for the control of the defence of such action and Buyer further
         covenants to undertake, in good faith, the full and complete defence of
         any such action. Buyer shall not abandon or make any concessions in the
         defence of such patent suits which affect Parent's or its Affiliates'
         ability to manufacture or sell the Active Ingredient or any product
         made therewith outside the Territory or any other products or research
         or development projects in or outside the Territory. Parent shall
         reimburse Buyer with respect to such actions in the same manner and to
         the same extent as set forth in Section 3.4 hereof, provided, that (i)
         if the action has been instituted by Genentech, Inc. or a subsidiary or
         licensee of Genentech, Inc., Parent shall not be obligated to make any
         payment to Buyer as a result of any settlement thereof unless such
         settlement is commercially reasonable for Buyer under the circumstances
         in absence of Parent's reimbursement obligations pursuant to this
         Section 13.7 and (ii) in the case of any other action, Parent shall not
         be obligated to make any payment to Buyer as a result of any settlement
         thereof unless in the judgement of Parent such settlement is reasonable
         under the circumstances.

14.      NOTICES

         Any notice required or permitted to be given hereunder shall be deemed
         sufficient if sent by facsimile letter or overnight courier, or
         delivered by hand to Parent or Buyer at the respective addresses and
         facsimile numbers set forth below or at such other address and
         facsimile number as either party hereto may designate. If sent by
         facsimile letter, notice shall be deemed given when the transmission is
         completed if the sender has a confirmed transmission report and if the
         sender has sent a confirmation copy by registered mail. If a confirmed
         transmission report does not exist, then the notice will be deemed
         given when the notice is actually received by the person to whom it is
         sent. If delivered by overnight courier, notice shall be deemed given
         when it has been signed for. If delivered by hand, notice shall be
         deemed given when received.

         If to Buyer, to:

         Centocor, Inc.
         200 Great Valley Parkway
         Malvern, PA 19355-1307
         Attention: Corporate Secretary
         Fax: 610-651-6331

                                      44
<PAGE>
 
         if to Parent, to:

         Roche Healthcare Limited
         P.O. Box HM 905
         Hamilton HM DX
         Bermuda
         Attention: President
         Fax: ++1 441 295-4165

         with a copy to:

         F. Hoffmann-La Roche Ltd
         CH-4070 Basel, Switzerland
         Attention: Corporate Law Department
         Fax: ++41 61 688 1396

15.      ARBITRATION AND GOVERNING LAW

                15.1.   Except for the right of either party to apply to a court
         of competent jurisdiction for a temporary restraining order to preserve
         the status quo or prevent irreparable harm pending the selection and
         confirmation of a panel of arbitrators, any dispute, controversy, or
         claims arising under, out of or relating to this Agreement (and
         subsequent amendments thereof), its valid conclusion, binding effect,
         interpretation, performance, breach or termination, including tort
         claims, shall be referred to and finally determined by arbitration, to
         the exclusion of any courts of law, in accordance with the Rules of
         Arbitration of the International Chamber of Commerce as in force at the
         time when initiating the arbitration. The arbitral tribunal shall
         consist of three arbitrators. The place of arbitration shall be
         Hamilton, Bermuda. The language to be used in the arbitral proceedings
         shall be English. The arbitration decision shall be final and binding
         upon the parties and the parties agree that any award granted pursuant
         to such decision may be entered forthwith in any court of competent
         jurisdiction. This arbitration clause and any award rendered pursuant
         to it shall be governed by the United Nations Convention on the
         Recognition and Enforcement of Foreign Arbitration Awards signed in New
         York as of 10 June, 1958. The party to whom a favourable ruling is
         awarded shall be entitled to reimbursement of all its reasonable costs
         and expenses in arbitration by the other party.

                15.2.   The present Agreement shall be subject to the
         substantive law of Bermuda (regardless of its or any other
         jurisdiction's choice of law principles).

                                      45
<PAGE>
 
16.      ADDITIONAL TERMS

                16.1.   Brokers. Buyer represents to Parent that it has not
         employed any investment banker, broker, finder or intermediary in
         connection with the transactions contemplated hereby who might be
         entitled to a fee or any commission from Parent upon consummation of
         the transactions contemplated hereby. Parent represents to Buyer that
         it has not employed any such person in connection with the transactions
         contemplated hereby who might be entitled to a fee or any commission
         from Buyer upon consummation of the transactions contemplated hereby.

                16.2.   Expenses, Taxes and Fees. Except as otherwise expressly
         provided in this Agreement, all legal, accounting and other costs and
         expenses incurred in connection herewith and the transactions
         contemplated hereby shall be paid by the party incurring such costs and
         expenses. Any possible value added, excise or transfer taxes or merger
         control filing fees or similar filing fees levied in connection with
         the present Agreement shall be paid and borne solely by Buyer and are
         not included in the Purchase Price or the payment for the inventory
         according to Section 3.

                16.3.   Entire Agreement. This Agreement, the Exhibits, the
         Schedules (including Disclosure Schedule), and the Confidentiality
         Agreement embody the entire agreement of the parties hereto with
         respect to the subject matter hereof and supersede and replace all
         previous negotiations, understandings, representations, writings, and
         contract provisions and rights relating to the subject matter hereof.

                16.4.   Successors and Assigns. This Agreement shall be binding
         upon and shall inure to the benefit of the parties and their respective
         successors and assigns; provided that this Agreement may not be
         assigned by any party without the written consent of the other party.

                16.5.   Amendments; No Waiver. No provision of this Agreement
         may be amended, revoked or waived except by a writing signed and
         delivered by an authorised officer of each party. No failure or delay
         on the part of either party in exercising any right hereunder will
         operate as a waiver of, or impair, any such right. No single or partial
         exercise of any such right will preclude any other or further exercise
         thereof or the exercise of any other right. No waiver of any such right
         will be deemed a waiver of any other right hereunder.

                                      46
<PAGE>
 
                16.6.   Counterparts. This Agreement may be executed in one or
         more counterparts all of which shall together constitute one and the
         same instrument and shall become effective when a counterpart has been
         signed by Buyer and delivered to Parent and a counterpart has been
         signed by Parent and delivered to Buyer.
         
                16.7.   Captions. The captions herein are included for
         convenience of reference only and shall be ignored in the construction
         or interpretation hereof.

         IN WITNESS WHEREOF, this Agreement has been signed by duly authorised
representatives of each of the parties hereto as of the date first above
written.

Roche Healthcare Limited                    Centocor, Inc.



By /s/ John R. Talbot                       By  /s/ David P. Holveck
   ---------------------------                  --------------------------- 
Name  John R. Talbot                        Name  David P. Holveck
     -------------------------                   --------------------------  
Title: President                            Title: Chief Executive Officer
      ------------------------                    -------------------------


                                      47
<PAGE>
 
List of Exhibits
- ----------------
                                      48
<PAGE>
                                                                  Exhibit 10.35 

                                                                  Exhibit A
                                                                  ---------


                         TRANSITION SERVICES AGREEMENT


     THIS TRANSITION SERVICES AGREEMENT (the "Agreement") is made and entered
into on ____________ ,1998 by and between Boehringer Mannheim Corporation
("Seller") on the one hand and Centocor, Inc. ("Buyer") on the other hand.

     WHEREAS Roche Healthcare Limited ("Parent") and Buyer have entered into an
Asset Purchase Agreement dated February 11, 1998 (the "Asset Purchase
Agreement") relating to RETAVASE (the "Product"), and

     WHEREAS the parties agree that Buyer or its Affiliates shall take over the
distribution of the Product as soon as possible when Buyer or its Affiliate has
obtained the pertaining necessary government approvals for the distribution of
the Product.  Parent and Buyer have agreed in the Asset Purchase Agreement that
Parent or its Affiliates shall provide certain transition services to Buyer or
its Affiliates for the Product under a transition services agreement for a
certain transition period after Closing.

Now, therefore the parties hereto agree as follows:

ARTICLE 1.     DEFINITIONS

1.1. "Affiliate" of a party means any corporation or other business entity
     controlled by, controlling or under common control with, such party. For
     this purpose "control" shall mean direct or indirect beneficial ownership
     of more than fifty percent (50%) of the voting or income interest in such
     corporation or other business entity; provided, however, Genentech, Inc.
     and its subsidiaries shall not be considered an Affiliate of Parent.

1.2. "Fully Loaded Costs" means all direct expenses and, with respect to time
     spent on a project by employees, an hourly rate which equals salary
     (including benefits) plus overhead allocated on the basis of time spent.

1.3. "Net Sales" means  gross sales occurring after the Closing Date after
     deduction of returns, distributor discounts, sales rebates (price
     reduction) and volume (quantity) discount as well as sales taxes (e.g.
     value added taxes) and other taxes directly linked to the sales (e.g.
     excise taxes) attributed to those sales.

                                       1
<PAGE>
 
1.4. "Services Fee" means a rate which equals 4% of Net Sales for the first
     month, 3% of Net Sales for the second month and 2% of Net Sales for the
     third month (and thereafter) following the Closing Date.

1.5. "Services" means any and all services with respect to the Product provided
     by Seller to Buyer pursuant to this Agreement.

1.6. "Territory" means the United States and Canada and respective possessions
     or territories.

1.7. Other Terms.    The term "Product" as well as other defined terms used
     herein and not defined above shall have the respective meanings assigned to
     such terms in the Asset Purchase Agreement.


ARTICLE 2.     RESPONSIBILITY OF PARTIES

2.1. Provision of Services.     Subject to the terms hereof, Seller and/or its
     designated Affiliate(s) shall (a) cooperate with Buyer or its Affiliate and
     assist in the orderly transition of the Business in the Territory to Buyer,
     and (b) provide the Services described herein that are requested by Buyer.

2.2. Cooperation and Assistance.     Seller or its designated Affiliate(s) shall
     make available knowledgeable employees/the individuals identified on
     Schedule I, or their qualified designees, for consultation with Buyer's
     representatives who shall be designated in writing to Seller via telephone,
     correspondence or in person at Seller's or its designated Affiliate's
     facilities for the purpose of conveying and transferring information
     relating to the operation of the Business in the Territory. Such
     consultation shall occur for reasonable periods of time upon reasonable
     notice during normal business hours. Seller may appoint substitutes for the
     individuals listed on Schedule I. Notwithstanding any other provision of
     this Agreement, the individuals listed on Schedule I (or their substitutes)
     shall be available for reasonable consultation but only for a period of six
     (6) months following Closing.

2.3. Distribution Agency Services.      With respect to the Product in the
     Territory, Seller or its designated Affiliate(s) shall provide all services
     (including warehousing and distribution, order taking, shipping, invoicing
     and collecting) customarily performed by a distribution agent and as
     currently conducted by Seller in connection with the sale of the Product in
     the Territory, including the following:

                                       2
<PAGE>
 
     (a) accepting orders and invoicing purchasers on behalf of Buyer;
     (b) processing all Product returned by customers in accordance with Section
         3 of this Agreement;
     (c) order entry and billing services;
     (d) recording sales and collecting amounts due in accordance with Section 4
         of this Agreement;
     (e) making appropriate payments for charge-backs and rebates subject to
         Section 3.1; and
     (f) customer complaint and inquiry services;

     it being understood that in providing such services Seller and/or its
     Affiliates shall continue to use certain tangible assets not transferred to
     Buyer at Closing including, without limitation, AUDIUS system, electronic
     mail, computer hardware and call reporting.

2.4. Customer Information. In order to inform customers of the transfer of
     the Business to Buyer, and otherwise transition same, Seller and/or its
     Affiliates and Buyer shall notify all contracted customers, trade customers
     and wholesalers of the transfer of the Product to Buyer by a method and at
     a time mutually agreed to by the parties. Notice to wholesalers  shall
     allow adequate transition time for the wholesalers. The parties hereby
     agree that Seller and its Affiliates shall not be responsible for providing
     Buyer with any sales or promotion support.

2.5. Government Contracts. The parties shall mutually agree on the timing and
     method of notifying applicable federal agency customers and the Health Care
     Financing Administration ("HCFA") of the sale of the Product to Buyer, and
     shall take whatever action is necessary to simultaneously add the Product
     to Buyer's federal supply schedule and Medicaid rebate agreement and delete
     the Product from the federal supply schedule and Medicaid rebate agreement
     of Seller or its Affiliates, as applicable.

2.6. Reports. Seller shall submit in writing to Buyer (i) within four (4)
     business days after the end of each month a report setting forth total
     Sales, and (ii) within fifteen (15) days after the end of each calendar
     month a report as set forth on Schedule II and such other information as
     Buyer shall reasonably request and that the BM Group had in place prior to
     the Closing Date.

2.7. NDC Numbers. Promptly following the Closing, Buyer shall take any and all
     action necessary to change the National Drug Code number for the Product,
     which change shall be implemented under Section 7.1 of the Asset Purchase
     Agreement; and if such number shall be obtained during the term of this
     Agreement, the 

                                       3
<PAGE>
 
     parties will discuss the appropriate implementation thereof with respect to
     the Services provided hereunder. Payments with respect to rebates shall be
     consistent with the Asset Purchase Agreement.

2.8. Payment of Net Sales.  Four days following the end of each month, Seller
     will wire transfer to Buyer an amount equal to total Net Sales collected
     for such month less the amount of the Services Fee portion of the fee
     calculated for such month under Section 5.2.

2.9. Medical Safety and Reporting. Following Closing, Buyer, will be responsible
     to provide all drug safety services for the Product in the Territory, such
     as handling medical and safety inquiries regarding the Product, receiving
     adverse event inquiries and report preparation, and the preparation and
     submission of two required quarterly reports, namely the Drug Safety
     Periodic Report and the Drug Safety Increased Frequency Report. Buyer
     represents to Seller that it will employ a trained physician to handle such
     inquiries and report preparation and filing. Following Closing, Seller and
     Buyer shall cooperate in good faith, as defined by the regulatory and drug
     safety reporting transition teams, to respond to all such questions, calls
     or inquiries.  Seller shall during the term of this Agreement forward
     medical safety information concerning the Products in the Territory
     received by Seller or its Affiliates to Buyer.


ARTICLE 3.     PRODUCT RETURNS

3.1. Returns.  The responsibility for Product returns in the Territory
     shall be governed by Section 8.11 of the Asset Purchase Agreement. During
     the term of this Agreement, Seller and its Affiliates process and pay all
     claims received by them for returns of Product in accordance with the
     provision of their return goods policy attached hereto as Schedule III.
     Buyer shall not engage in any action (other than pricing of the Product) to
     induce any purchaser of the Product to return Product sold prior to Closing
     Date; provided, however, that to the extent returns of Product result from
     changes in pricing by Buyer, Buyer shall be responsible for such returns.
     For Product shipped after the Closing Date, Buyer shall be responsible for
     all returns of the Product within the Territory. Buyer shall reimburse
     Seller and its Affiliates for all cost of returns handled by Seller and its
     Affiliates hereunder for which Buyer is responsible according to Section
     8.11 of the Asset Purchase Agreement.

3.2. Disposition of Returned Product.  Returned Product will be handled in
     accordance with the provisions of the disposition of returned goods policy

                                       4
<PAGE>
 
     Seller, a copy of which is attached hereto as Schedule IV.
 

ARTICLE 4.     ACCOUNTS RECEIVABLE

     So long as it continues to provide Services, Seller or its designated
     Affiliate(s) shall use reasonable efforts (except for instituting third
     party collection or legal proceedings) to collect accounts receivable with
     respect to the Product.


ARTICLE 5.     PAYMENTS

5.1. Fees.     In consideration of Seller's and its Affiliate(s) Services under
     this Agreement, Buyer will pay to Seller a fee equal to the Services Fee.
     In addition, Seller and its Affiliate(s) shall be reimbursed their Fully
     Loaded Costs for any extraordinary services (i.e., those services beyond
     those expected in the context of ordinary business operations) including
     without limitation the cost of destruction of returned goods other than
     pursuant to on-going, normal business operations and the participation of
     Seller and its Affiliates in any recall of Product, "scrap" charges
     incurred because of NDC or other labelling or packaging changes,
     transportation costs associated with the delivery of inventory and records
     upon termination of this Agreement and any other expenses incurred by
     Seller and its Affiliates specifically as a result of this Agreement.
     Buyer will reimburse Seller and its Affiliates with respect to the
     foregoing costs, if any, within thirty (30) days of receipt of Seller's
     statement.

5.2. Calculations.  As soon as practicable after the end of each calendar month,
     Seller and its Affiliates will calculate the total amount of fee payable by
     Buyer for such month under Section 5.1.


ARTICLE 6.     STANDARD FOR SERVICE

     Seller and its Affiliate(s) shall meet the standards of the applicable
     profession in performing Services hereunder; provided that neither Seller
     and its Affiliate(s) nor their employees shall have any liability to Buyer
     in connection with such performance absent bad faith, negligence or wilful
     misconduct. As a principle, the parties agree that the quality and quantity
     of Services provided hereunder to Buyer (including without limitation the
     substance, timeliness and diligence thereof) shall be substantially the
     same as the quality and quantity of services previously rendered in
     relation to the Product by BMC personnel. Nothing contained in this

                                       5
<PAGE>
 
     Agreement shall require Seller and its Affiliate(s) to alter its
     operations, policies, procedures, method of doing business, reporting
     mechanism or formats or information technology systems in order to provide
     Services hereunder or otherwise engage in any extraordinary activities,
     except as set forth in this Agreement. If Buyer suffers any loss or damage
     caused directly by the bad faith, negligence or wilful misconduct of
     Seller, its Affiliates or their employees hereunder, Buyer shall be
     entitled to recover its direct costs incurred. Under no circumstances shall
     Seller and its Affiliates have to pay or shall Buyer be entitled to recover
     any consequential, special, indirect or incidental damages hereunder.


ARTICLE 7.     TERM AND TERMINATION

7.1. Term. This Agreement shall commence as of the Closing date under the Asset
     Purchase Agreement and shall expire on the later of (i) 3 (three) months
     following the Closing Date and (ii) when Buyer or its Affiliate has
     obtained the pertaining necessary government approvals for the distribution
     of the Product in the country concerned, but in no event later than 6 (six)
     months after the Closing Date under the Asset Purchase Agreement. Buyer
     shall use best efforts to assume the Services provided by Seller and its
     Affiliates hereunder as soon as possible, whenever possible earlier than
     the expiry of this Agreement. If Buyer is, despite such best efforts,
     unable to assume the services being provided within the term of this
     Agreement, Buyer and Seller shall discuss in good faith solutions for the
     countries concerned.

7.2. Termination.     Either party may terminate this Agreement with immediate
     effect upon written notice (a) if the other party is in material breach or
     default with respect to any term or provision hereof and fails to cure the
     same within twenty-one (21) days of receipt of notice of said breach or
     default or (b) if the other party is or will inevitably in the near future
     be dissolved, liquidated or bankrupt. Buyer may terminate this Agreement at
     any time upon not less than ten (10) days written notice, provided any
     transition issues that will require cooperation after termination are
     mutually agreed to by the parties.

7.3. Rights and Duties of Parties Upon Termination.  Upon expiration or other
     termination of this Agreement in accordance with the terms hereof, the
     parties shall cooperate in the orderly termination of the Services
     hereunder, including without limitation the transfer of Product to Buyer;
     and the transfer of other information relating solely to the Product,
     including customer information.

                                       6
<PAGE>
 
ARTICLE 8.     CONFIDENTIALITY

     Seller and its Affiliates shall treat as confidential all information
     provided by Buyer hereunder, including but not limited to information
     relating to the Services. Buyer shall provide such information only to
     those employees of Seller and its Affiliates that require such information
     to effect the provisions of this Agreement. Seller shall not use such
     information except for the express purposes contemplated by this Agreement
     and shall not disclose such information to any individual or entity (except
     to such of its employees, Affiliates and subcontractors who reasonably
     require same for the purposes hereof and who are bound to Seller by like
     obligations as to confidentiality and non-use) without the express written
     permission of Buyer. Notwithstanding the foregoing, Seller shall not be
     prevented from using or disclosing any portion of such information that
     Seller can prove: (a) was in the public domain prior to the date of this
     agreement or thereafter enters the public domain through no fault of
     Seller, its Affiliates or their respective representatives; (b) was
     available to Seller on a non-confidential basis prior to its disclosure to
     Seller by Buyer, its Affiliates or their respective representatives; (c) is
     later lawfully acquired by Seller from sources other than Buyer, its
     Affiliates or their respective representatives who are not, to the best of
     knowledge of Seller, subject to any legally binding obligation to keep such
     information confidential; (d) independently developed by Seller without
     reference to such confidential information; or (e) is required by law,
     regulation, rule, act or order of any governmental authority or agency to
     be disclosed by Seller; provided, however, that in the case of (e), Seller
     gives Buyer sufficient advance written notice to permit Buyer to seek a
     protective order with respect to such information and thereafter Seller
     discloses only the minimum information required to be disclosed in order to
     comply. Should Seller and its Affiliates provide Buyer with any
     confidential information, or marked or confirmed in writing as confidential
     by Seller, relating to Seller's or its Affiliate(s) products or business,
     other than information which pertains to the Product or the Business, Buyer
     shall be subject to the confidentiality provisions under this Section 7.
     The obligations of each party under this Section shall remain in full force
     and effect for five (5) years following termination or expiration of this
     Agreement.


ARTICLE 9.     INDEPENDENT CONTRACTOR

     Each party shall act solely as an independent contractor and nothing in
     this Agreement shall be construed to give either the power or authority to
     enter into or incur, any commitments, expenses or liabilities whatsoever on
     behalf of the other party. Nothing herein shall be construed to create the
     relationship of partnership, 

                                       7
<PAGE>
 
     principal and agent, or joint venture between Buyer and Seller, other than
     as expressly set forth herein.


ARTICLE 10.   NOTICES

     Any notice required or permitted to be given hereunder shall be deemed
     sufficient if sent by facsimile letter or overnight courier, or delivered
     by hand to Seller or its designates Affiliate(s) or to Buyer at the
     respective addresses and facsimile numbers set forth below or at such other
     address and facsimile number as either party hereto may designate. If sent
     by facsimile letter, notice shall be deemed given when the transmission is
     completed if the sender has a confirmed transmission report. If a confirmed
     transmission report does not exist, then the notice will be deemed given
     when the notice is actually received by the person to whom it is sent. If
     delivered by overnight courier, notice shall be deemed given when it has
     been signed for. If delivered by hand, notice shall be deemed given when
     received.

     All correspondence to Seller shall be addressed as follows:

     Boehringer Mannheim Corporation
     101 Orchard Ridge Drive
     Gaithersburg, MD 20878
     Attention: Law Department
     Fax: 301-990-3815

     with a copy to:

     F.Hoffmann-La Roche Ltd
     CH-4070 Basel, Switzerland
     Attention: Corporate Law Department
     Fax: ++41 61 688 1396

                                       8
<PAGE>
 
          All correspondence to Buyer shall be addressed as follows:

          Centocor, Inc.
          200 Great Valley Parkway
          Malvern, PA 19355-1307
          Attention: Corporate Secretary
          Fax: 610-651-6331

ARTICLE 11.    SUCCESSORS AND ASSIGNS

          This Agreement shall be binding upon and shall inure to the benefit of
          the parties and their respective successors and assigns; provided that
          this Agreement may not be assigned by any party without prior written
          consent of the other party except that Seller may assign this
          Agreement to one or more of its Affiliates with the prior written
          consent of Buyer, which consent shall not be unreasonably withheld.

ARTICLE 12.    ADDITIONAL TERMS

12.1.     Arbitration and Governing Law. Any dispute, controversy or claim
          arising out of or relating to this Agreement shall be settled by final
          and binding arbitration in accordance with the arbitration provisions
          and the governing law of the Asset Purchase Agreement.

12.2.     Entire Agreement. This Agreement, along with the Asset Purchase
          Agreement, constitutes the entire understanding between the parties
          with respect to the subject matter hereof and supersedes and replaces
          all previous negotiations, understandings, representations, writings,
          and contract provisions and rights relating to the subject matter
          hereof. If there is any conflict between this Agreement and the terms
          and conditions contained on any purchase order or invoice, the terms
          and conditions of this Agreement shall prevail.

12.3.     Amendments; No Waiver. No provision of this Agreement may be amended,
          revoked or waived except by a writing signed and delivered by an
          authorized officer of each party. No failure or delay on the part of
          either part in exercising any right hereunder will operate as a waiver
          of, or impair, any such right. No single or partial exercise of any
          such right will preclude any other or further exercise thereof or the
          exercise of any other right. No waiver of any such right will be
          deemed a waiver of any other right hereunder.

12.4.     Validity. Should any part or provision of this Agreement be held
          unenforceable or invalid, the invalid or unenforceable provision shall
          be replaced with a provision

                                       9
<PAGE>
 
      that accomplishes, to the extent possible, the original business purpose
      of such provision in a valid and enforceable manner, and the remainder of
      this Agreement shall remain binding upon the parties.

12.5. Counterparts.  This Agreement may be executed in one or more counterparts,
      each of which shall be deemed to be an original, but all of which together
      shall constitute a single agreement.

      IN WITNESS WHEREOF, the parties hereto have caused this Agreement to be
executed as of the day and year first hereinabove written.


Boehringer Mannheim Corporation     Centocor, Inc.



By                              By
  -------------------------       ---------------------------
Name                            Name                          
    -----------------------         -------------------------
Title:                          Title: 
      ---------------------           -----------------------

                                       10
<PAGE>
 
                                  SCHEDULE I


                                SELLER CONTACTS

<TABLE>
<CAPTION>
                                                   Key Contacts:

                                            Primary              Secondary
                                            -------              ---------
<S>                                     <C>              <C>
Overall questions of policy on major
unresolved issues

General operational questions             Barry Buzogany     Emile Williams     
                                                                                
Legal                                     Barry Buzogany     Donate Garoner     
                                                                                
Sales and marketing                       Jesus Leal         Jim Lennertz       
                                                                                
Contracts                                 Dave Martinez      Kathy Jarber       
                                                                                
Production planning/specific orders       Phil Rothchild     Veronica Starks    
                                                                                
Accounting/Finance                        Emile Williams     Kirk Barton        
                                                                                
Inventory                                 Phil Rothchild     Vic Pascoe         
                                                                                
Distribution                              Vic Pascoe         Phil Rothchild     
                                                                                
Records transfer/retention                Barry Buzogany     Donate Garoner     
                                                                                
Regulatory                                Julie Zimmerman    Chris Pannunzio    
                                                                                
Medicaid                                  Kirk Barton        Kathy Jarber       
                                                                                
Clinical Studies                          Stephan Fischer    Hugo Morales       
                                                                                
Medical Affairs                           Stephen Ohimor     Hugo Morales       
                                                                                
Quality Assurance/Quality Control         Lyn Olson          Karl-Wilhem Schultze
</TABLE>


<PAGE>
 
                                  SCHEDULE II


                               REPORTING FORMAT

<TABLE>
<CAPTION>
                                                  $ Amount  Units    Average
                                                                     price or cost
<S>                                               <C>       <C>      <C>
SALES:
Gross Sales
(by NDC for finished product or by product for
 bulk active)
 
Adjustments to gross sales:
 
Sales returns and allowances (by NDC)
 
Managed Care Rebates
(by NDC)
 
Medicaid Rebates
(by NDC)
 
Charge-backs (by NDC)
 
FINISHED GOOD INVENTORY
 
Beginning Balance
(by NDC)
 
Production (by NDC), @ agreed upon unit cost)
 
Cost of Sales (by NDC)
 
Ending Balance (by NDC)
</TABLE>


<PAGE>
 
                                                                   EXHIBIT 10.36

                                                                     Exhibit B
                                                                     ---------



                                SUPPLY AGREEMENT


       THIS SUPPLY AGREEMENT (this "Agreement") is made and entered into on
_____, 1998 by and between Boehringer Mannheim GmbH ("Seller") on the one hand
and Centocor, Inc. ("Buyer") on the other hand.

       WHEREAS Roche Healthcare Limited ("Parent") and Buyer have entered into
an Asset Purchase Agreement dated February 11, 1998 (the "Asset Purchase
Agreement") relating to RETAVASE (the "Product"), and

       WHEREAS Parent and Buyer have agreed in the Asset Purchase Agreement that
Seller and/or its Affiliates shall supply bulk labelled lyophilized vials or
bulk Active Ingredient to Buyer or its Affiliate for a period of four years and
at certain terms and conditions to be set forth in more detail in the present
Supply Agreement;

       Now, therefore, the parties hereto agree as follows:

1.     DEFINITIONS

1.1.   "Active Ingredient" means recombinant reteplase (rPA), a recombinant, 
       non-glycosylated plasminogen activator containing amino acids 1-3 and 
       176-527 of the amino acid sequence of tissue-type plasminogen activator.

1.2.   "Affiliate" of a party means any corporation or other business entity
       controlled by, controlling or under common control with, such party. For
       this purpose "control" shall mean direct or indirect beneficial ownership
       of more than fifty percent (50%) of the voting or income interest in such
       corporation or other business entity; provided, however, Genentech, Inc.
       and its subsidiaries shall not be considered an Affiliate of Seller.

1.3.   "Product", for purposes of this Supply Agreement only, means either the
       Active Ingredient or any pharmaceutical preparation containing the Active
       Ingredient (sometimes hereinafter referred to as bulk labelled
       lyophilized vials), and including future formulation changes developed
       during the term of this Supply Agreement that are used by Seller to
       supply Buyer.

                                       1
<PAGE>
 
1.4.   "Specifications" has the meaning ascribed to such term in Section 5.1.1.

1.5.   "Territory" means the United States and Canada and respective possessions
       or territories.

1.6.   Other Terms.  The defined terms used herein and not defined above shall
       have the respective meanings assigned to such terms in the Asset Purchase
       Agreement.


2.     SUBJECT MATTER

2.1.   Subject Matter.  Subject to the terms and conditions of this Agreement,
       Seller or its designated Affiliate(s) shall supply to Buyer during the
       term of the present Agreement Buyer's requirements of the bulk labelled
       lyophilized vials or bulk Active Ingredient manufactured by Seller or
       Affiliates of Seller, provided that Seller and its Affiliates shall not
       be obliged to supply bulk labelled lyophilized vials or bulk Active
       Ingredient in excess of its capacity.


3.     FORECASTS AND ORDERS

3.1.   Forecasts.  Buyer shall give Seller or Seller's designated Affiliate(s)
       within one month from the date of this Agreement and thereafter at the
       beginning of every calendar quarter the estimate by month of its
       requirements of bulk labelled lyophilized vials or bulk Active Ingredient
       for the following 12 (twelve) months. The first 3 (three) months of each
       estimate shall constitute a firm order. Each successive estimate (after
       the first such estimate) shall update the estimate previously given for
       the last calendar quarter covered by the immediately preceding estimate
       and add an estimate for the calendar quarter following immediately
       thereafter, such that Seller shall have sufficient information upon which
       to schedule its manufacturing operations so as to be able to meet Buyer's
       estimated requirements of the bulk labelled lyophilized vials or bulk
       Active Ingredient. Seller shall not provide any of the forecast
       information set forth above to Genentech, Inc.

3.2.   Orders.  Buyer shall provide a written firm purchase order to Seller or
       its designated Affiliate(s) (at one of Seller's or its Affiliates'
       offices designated by Seller) at least 3 (three) months prior to a
       requested delivery date. Seller or its designated Affiliate(s) shall
       supply the bulk labelled lyophilized vials or bulk Active Ingredient
       within 3 (three) months after receipt of a firm order therefor from
       Buyer. In the event that the sum of the orders for delivery within any

                                       2
<PAGE>

THE REGISTRANT HAS REQUESTED CONFIDENTIAL TREATMENT FOR CERTAIN PORTIONS OF THIS
AGREEMENT. THOSE PORTIONS HAVE BEEN OMITTED FROM THIS COPY OF THE AGREEMENT AT 
THE PLACES INDICATED BY ASTERICKS (*); AND HAVE BEEN FILED SEPARATELY WITH THE 
SECURITIES AND EXCHANGE COMMISSION

       calendar quarter exceeds 100% (one hundred percent) of the most recent
       estimate given by Buyer for such calendar trimester pursuant to Section
       3.1 above, and subject to the supply obligation set forth in Section 2.1
       above, Seller and Buyer shall consult with each other and Seller shall be
       allowed such reasonable time as is needed to arrange for the orderly
       manufacture of such additional requirements.

3.3    Minimum Order Size.  The minimum size of any order for any bulk labelled
       lyophilized vials or bulk Active Ingredient shall be one full batch of
       such bulk labelled lyophilized vials (as set forth in Schedule 3.3
       hereto) or bulk Active Ingredient with larger orders being in whole
       number multiples of such a batch.


4.     PRICE, DELIVERY AND PAYMENT CONDITIONS

4.1    Price.  Buyer shall purchase the bulk labelled lyophilized vials from the
       Seller at DM [*] per vial or DM [*] per amount of bulk Active
       Ingredient contained in one such vial or, in the case of formulation
       changes, a price to be agreed on by the parties in good faith.

4.2    Delivery Conditions. Title and risk of loss or damage to any bulk
       labelled lyophilized vials or bulk Active Ingredient supplied hereunder
       shall pass to Buyer upon delivery at Seller's or its Affiliate's
       manufacturing plant to a common carrier for delivery of such Product.
       Buyer shall be responsible and pay for any and all customs duties, value
       added, excise and other taxes, clearances and/or levies of any type
       whatsoever with regard to the supply of the Product from Seller or its
       Affiliate hereunder Seller may select a common carrier for shipment of
       goods; delivery will be per Buyer's instruction.

4.3    Certificate of Analysis.  All bulk labelled lyophilized vials or bulk
       Active Ingredient supplied to Buyer shall be accompanied by a signed and
       dated Certificate of Analysis, which shall be substantially in the form
       attached as Schedule 4.3 hereto. A copy of this Certificate of Analysis
       will be sent by fax to the appropriate contact person at Buyer. The
       original Certificate of Analysis shall be dispatched by airmail, or sent
       together with the Product, at the time of shipment in accordance with
       Buyer's instructions.

4.4    Invoicing and Payment Conditions.  Seller or its designated Affiliate(s)
       shall invoice Buyer in German marks for all supplies of bulk labelled
       lyophilized vials or bulk Active Ingredient hereunder monthly after
       delivery as defined herein. Buyer shall effect payment of such invoices
       in German marks to Seller's or its Affiliate(s) designated bank account
       within 30 (thirty) days after the date of 

                                       3

                       Confidential Treatment Requested
<PAGE>
 
       invoice. Seller and its Affiliate(s) may charge a late payment fee of
       1.5% of the outstanding balance for each 30 (thirty) day period
       thereafter during which said balance remains unpaid.

4.5    Supply. If there is an interruption in the manufacture of the bulk
       labelled lyophilized vials or bulk Active Ingredient for a period of more
       than 45 days (i) caused by the actions of Seller or its Affiliates, Buyer
       shall have first call on the then available supply, or (ii) caused by
       actions other than those of Seller or its Affiliates, the then available
       supply shall be divided between Seller and Buyer based upon their
       respective previous three months' sale.

5.     SPECIFICATIONS, WARRANTY AND INDEMNIFICATION

5.1    Warranties; Specifications and Analysis

5.1.1. Seller represents and warrants that the bulk labelled lyophilized vials
       or bulk Active Ingredient manufactured by Seller or its Affiliate(s) for
       Buyer pursuant meet the FDA approved specifications therefor, as may be
       amended from time to time by Seller after reasonable prior notice to
       Buyer which is sufficient to enable Buyer to assess the impact of the
       amendment on Buyer's manufacturing process, but not exceeding 60 (sixty)
       days, and prior approval by the respective registration authorities, if
       required (the "Specifications").

       Seller or its Affiliate shall send to Buyer with each such shipment a
       certificate of analysis specifying, inter alia, the results of each of
       the determinations required to show conformance of such shipment with the
       Specifications. The figures set forth in the certificate of analysis
       shall be accepted as accurate for the purposes of this Agreement unless
       Buyer within 30 (thirty) days of the receipt of such shipment notifies
       Seller in writing that it has analysed such shipment in accordance with
       Seller's or its Affiliates' methods of analysis, as may be amended from
       time to time by Seller after reasonable prior notice to Buyer which is
       sufficient to enable Buyer to assess the impact of the amendment on
       Buyer's manufacturing process, but not exceeding 60 (sixty) days, and
       prior approval by the respective registration authorities, if required
       and has determined that such shipment does not conform to the
       Specifications. In the latter event, Buyer and Seller agree to consult
       with each other in order to resolve the discrepancy between each other's
       determinations. If such consultations do not resolve the discrepancy,
       Buyer and Seller agree to nominate an independent, reputable laboratory,
       acceptable to both parties, which shall carry out determinations on
       representative samples taken from such shipment, using Seller's or its
       Affiliates' methods of analysis, and the resulting determinations shall
       be binding on Buyer and Seller for the purposes hereof. The 

                                       4
<PAGE>
 
       cost of the analysis of such independent laboratory shall be borne by the
       party whose testing was in error.

5.1.2. If it is determined that a shipment of bulk labelled lyophilized vials or
       bulk Active Ingredient, as of the date shipped, does not conform to the
       Specifications, Seller shall replace such shipment with a substitute
       shipment that meets the Specifications. The above shall be Seller's and
       its Affiliates' sole liability for, and Buyer's sole and exclusive remedy
       for the supply of any Product that do not conform to the Specifications.
       The non-conforming shipment shall be returned, at Seller's expense by
       Buyer to Seller upon final determination in accordance with Section 5.1.1
       above that it does not meet the Specifications.

5.2    DISCLAIMER. EXCEPT AS SET FORTH IN SECTIONS 5.1.1 AND 5.1.2 ABOVE, SELLER
       MAKES NO REPRESENTATIONS AND DISCLAIMS ANY WARRANTIES OF ANY KIND,
       EXPRESS OR IMPLIED, TO BUYER FOR ANY BULK LABELLED LYOPHILIZED VIALS OR
       BULK ACTIVE INGREDIENT SUPPLIED BY SELLER OR ITS AFFILIATES HEREUNDER,
       INCLUDING WITHOUT LIMITATION ANY WARRANTIES OF MERCHANTABILITY OR FITNESS
       FOR A PARTICULAR PURPOSE.

5.3    Recall. Buyer is competent and responsible for deciding about and
       effecting a recall of the Product. In case of such a recall, to the
       extent necessary or needed, Seller shall cooperate with Buyer as
       reasonably required in carrying out any such recall. Buyer shall
       reimburse Seller and its Affiliates for any cost reasonably expended by
       Seller and its Affiliates to effect the recall, provided that if a recall
       is caused by non-compliance of the Product with the Specifications at the
       date of shipment, Seller shall reimburse Buyer for (a) any cost
       reasonably expended by Buyer to effect the recall, (b) any manufacturing
       and shipping fees paid to Seller by Buyer for recalled Product, and (c)
       any reasonable disposal costs for such recalled Product.

5.4    Indemnification

5.4.1. Indemnification by Seller. Subject to the following limitations, Seller
       shall be liable for and shall indemnify and hold harmless Buyer in
       respect of any and all liabilities, losses, damages, claims or lawsuits,
       including but not limited to any liabilities, losses, damages, claims or
       lawsuits arising out of the manufacture, use, sale or marketing of the
       Product, including but not limited to any claims made (directly or
       indirectly) by or on behalf of consumers who have purchased or otherwise
       obtained and/or used the Product, arising from Seller's (i) failure to

                                       5
<PAGE>
 
       supply bulk labelled lyophilized vials or bulk Active Ingredient meeting
       FDA specifications upon delivery to Buyer, provided that Buyer gives
       Seller prompt, adequate notice of such third party claim and permits
       Seller to assume the sole control of all phases of the defense and/or
       settlement of such claim, including the selection of counsel, it being
       understood that Seller shall not be liable for any negligent act or
       omission of Buyer or for any representations and warranties, express or
       implied, made by Buyer that exceed the representations and warranties
       made by Seller to Buyer under this Agreement, (ii) breach of this
       Agreement, (iii) negligence or wilful misconduct, (iv) breach of
       statutory duty, or (v) act, omission or default howsoever caused on the
       part of Seller, its Affiliates, employees and agents. The indemnity by
       Seller set forth in clause (i) above shall include loss of Buyer's
       profits unless Seller is able to demonstrate that Seller's failure to
       supply bulk labelled lyophilized vials or bulk Active Ingredient meeting
       FDA specifications upon delivery to Buyer was entirely beyond Seller's
       control and in no part the result of negligence or wilful misconduct on
       the part of Seller.

5.4.2. Indemnification by Buyer. Subject to the following limitations, Buyer
       shall be liable for and shall indemnify and hold harmless Seller in
       respect of any and all liabilities, losses, damages, claims or lawsuits,
       including but not limited to any liabilities, losses, damages, claims or
       lawsuits arising out of the manufacture, use, sale or marketing of the
       Product, including but not limited to any claims made (directly or
       indirectly) by or on behalf of consumers who have purchased or otherwise
       obtained and/or used the Product, arising from Buyer's (i) breach of this
       Agreement, (ii) negligence or wilful misconduct, (iii) breach of
       statutory duty or (iv) act, omission or default howsoever caused on the
       party of Buyer, its employees and agents. Notwithstanding the foregoing,
       Buyer shall not be liable to Seller, whether in contract, tort or
       otherwise, for any consequential, indirect, economic or financial loss or
       damage (including, without prejudice to the generality of the foregoing,
       any loss of turnover, revenue, profits, business or goodwill) howsoever
       caused.


6.     CONFIDENTIALITY

6.1    Subject to the Asset Purchase Agreement, each party shall during and for
       5 (five) years after the term of this Agreement not use for any other
       purpose than contemplated under this Agreement and not disclose to any
       person (not including a contract manufacturer of Buyer with respect to
       manufacture of the Active Ingredient, provided that such contract
       manufacturer (i) shall be obligated to keep such confidential information
       confidential and (ii) shall not use such information for any purpose
       other than with respect to manufacture of the Active Ingredient) 

                                       6
<PAGE>
 
     any confidential information received from the other party concerning
     formulas, manufacturing processes, commercial methods and other activities
     of the other party, except to the extent required by government authorities
     for the execution of this Agreement or relating to the safety of the
     Product.

6.2  It is understood that confidential information shall not include
     information which the party receiving the information (in the case of
     either Seller or Buyer, their Affiliates and their respective
     representatives, "Receiving Party") can prove (a) was in the public domain
     prior to the date of this agreement or thereafter enters the public domain
     through no fault of Receiving Party; (b) was available to Receiving Party
     on a non-confidential basis prior to its disclosure to Receiving Party by
     the party providing the information (in the case of either Seller or Buyer,
     their Affiliates and their respective representatives, "Providing Party");
     (c) is later lawfully acquired by Receiving Party from sources other than
     Providing Party who are not, to the best of knowledge of Receiving Party
     subject to any legally binding obligation to keep such information
     confidential; (d) independently developed by Receiving Party without
     reference to such confidential information; or (e) is required by law,
     regulation, rule, act or order of any governmental authority or agency to
     be disclosed by Receiving Party; provided, however, that in the case of
     (e), Receiving Party gives Providing Party sufficient advance written
     notice to permit Providing Party to seek a protective order with respect to
     such information and thereafter Receiving Party discloses only the minimum
     information required to be disclosed in order to comply.


7.   TERM AND TERMINATION

7.1  Term.  The present Agreement shall become effective at the Closing Date and
     shall remain in force for a period which is the earlier of (i) four years
     and (ii) three months following the date Buyer obtains all necessary
     approvals to manufacture the Active Ingredient, subject to extension with
     approval of the FTC.

7.2  Termination.  Notwithstanding Section 7.1 above, either party may terminate
     this Agreement at any time with immediate effect by written notice to the
     other party.

     a)   if the other party has failed to perform any of its obligations
          hereunder and has not corrected such default within 60 (sixty) days
          after dispute resolution pursuant to Section 8.1 hereof (provided
          that, even following the 60-day period referred to above, the Seller
          shall not have a right to terminate pursuant to this Section 7.2 a) as
          long as Buyer continues to pay all amounts due to Seller in accordance
          with Sections 4.4. and 5.4.2 

                                       7
<PAGE>
 
          hereof);

     b)   if the other party is or will inevitably in the near future be
          dissolved, liquidated or bankrupt; provided that Seller shall not have
          a right to terminate pursuant to this Section 7.2 b) as long as Buyer
          continues to pay all amounts due to Seller in accordance with Section
          4.4.


8.   ARBITRATION AND GOVERNING LAW

8.1  Arbitration.  Except for the right of either party to apply to a court of
     competent jurisdiction for a temporary restraining order to preserve the
     status quo or prevent irreparable harm pending the selection and
     confirmation of a panel of arbitrators, any dispute, controversy, or claims
     arising under, out of or relating to this Agreement (and subsequent
     amendments thereof), its valid conclusion, binding effect, interpretation,
     performance, breach or termination, including tort claims, shall be
     referred to and finally determined by arbitration, to the exclusion of any
     courts of law, in accordance with the Rules of Arbitration of the
     International Chamber of Commerce as in force at the time when initiating
     the arbitration. The arbitral tribunal shall consist of three arbitrators.
     The place of arbitration shall be Hamilton, Bermuda. The language to be
     used in the arbitral proceedings shall be English. The arbitration decision
     shall be final and binding upon the parties and the parties agree that any
     award granted pursuant to such decision may be entered forthwith in any
     court of competent jurisdiction. This arbitration clause and any award
     rendered pursuant to it shall be governed by the United Nations Convention
     on the Recognition and Enforcement of Foreign Arbitration Awards signed in
     New York as of 10 June, 1958. The party to whom a favourable ruling is
     awarded shall be entitled to reimbursement of all its reasonable costs and
     expenses in arbitration by the other party.

8.2  Governing Law.  The present Agreement shall be subject to the substantive
     law of Bermuda (regardless of its or any other jurisdiction's choice of law
     principles).


9.   MISCELLANEOUS

9.1  Force Majeure.  If any of the parties hereto finds itself in spite of
     ordinary care unable by reason of a duly evidenced case of force majeure,
     i.e. an event beyond its control, to carry out its obligations hereunder in
     whole or in part, the obligations of such party, to the extent that they
     are affected by such force majeure, shall be suspended as long as the
     impossibility so caused shall endure. 

                                       8
<PAGE>
 
     The party affected by force majeure shall immediately inform the other
     party and shall make all reasonable efforts to remedy the situation created
     by such force majeure as soon as possible.

9.2  Independent Contractor.  Each party shall act solely as an independent
     contractor and nothing in this Agreement shall be construed to give either
     the power or authority to enter into or incur, any commitments, expenses or
     liabilities whatsoever on behalf of the other party.  Nothing herein shall
     be construed to create the relationship of partnership, principal and
     agent, or joint venture between Seller and Buyer.

9.3  Quality Control.  In connection with the obligations of Seller and Buyer as
     set forth in this Agreement, Seller and Buyer shall review the quality
     control procedures required by the FDA and the Department of Health Canada
     in order to determine the most practical way in which to comply with such
     procedures.

9.4  Notices.  Any notice required or permitted to be given hereunder shall be
     deemed sufficient if sent by facsimile letter or overnight courier, or
     delivered by hand to Seller or Buyer at the respective addresses and
     facsimile numbers set forth below or at such other address and facsimile
     number as either party hereto may designate. If sent by facsimile letter,
     notice shall be deemed given when the transmission is completed if the
     sender has a confirmed transmission report and if the sender has sent a
     confirmation copy by registered mail. If a confirmed transmission report
     does not exist, then the notice will be deemed given when the notice is
     actually received by the person to whom it is sent. If delivered by
     overnight courier, notice shall be deemed given when it has been signed
     for. If delivered by hand, notice shall be deemed given when received.

     if to Buyer, to:

     Centocor, Inc.
     200 Great Valley Parkway
     Malvern, PA 19355-1307
     Attention: Corporate Secretary
     Fax: 610-651-6331


     if to Seller, to:
     Boehringer Mannheim GmbH
     Sandhofer Str. 116
     D-68305 Mannheim

                                       9
<PAGE>
 
     Germany
     Attention: Claus-Jorg Rutsch
     Fax: ++49 621 759 3523

     with a copy to:

     F.Hoffmann-La Roche Ltd
     CH-4070 Basel, Switzerland
     Attention: Corporate Law Department
     Fax: ++41 61 688 1396

9.5  Assignment.  Neither party shall have the right to assign the present
     Agreement or any part thereof to any third party without the prior written
     approval of the other party.  However, all Affiliates of Seller shall not
     be deemed to be third parties within the meaning of this provision.

9.6  Amendments: No Waiver.  No provision of this Agreement may be amended,
     revoked or waived except by a writing signed and delivered by an authorized
     officer of each party.  No failure or delay on the part or either party in
     exercising any right hereunder will operate as a waiver of, or impair, any
     such right.  No single or partial exercise of any such right will preclude
     any other or further exercise thereof or the exercise of any other right.
     No waiver of any such right will be deemed a waiver of any other right
     hereunder.

9.7  Validity.  Should any part or provision of this Agreement be held
     unenforceable or invalid, the invalid or unenforceable provision shall be
     replaced with a provision that accomplishes, to the maximum possible
     extent, the original business purpose of such provision in a valid and
     enforceable manner, and the remainder of this Agreement shall remain
     binding upon the parties.

9.8  Counterparts.  This Agreement may be executed in one or more counterparts
     all of which shall together constitute one and the same instrument and
     shall become effective when a counterpart has been signed by Buyer and
     delivered to Seller and a counterpart has been signed by Seller and
     delivered to Buyer.

                                       10
<PAGE>
 
     IN WITNESS WHEREOF, this Agreement has been signed by duly authorized
representatives of each of the parties hereto as of the date first above
written.


Boehringer Mannheim GmbH            Centocor, Inc.



By:                                 By: 
    -------------------------           --------------------------
Name:                               Name:
     ------------------------            ------------------------- 
Title:                              Title:
      -----------------------             ------------------------        

                                       11
<PAGE>

THE REGISTRANT HAS REQUESTED CONFIDENTIAL TREATMENT FOR CERTAIN PORTIONS OF THIS
AGREEMENT. THOSE PORTIONS HAVE BEEN OMITTED FROM THIS COPY OF THE AGREEMENT AT 
THE PLACES INDICATED BY ASTERICKS (*); AND HAVE BEEN FILED SEPARATELY WITH THE 
SECURITIES AND EXCHANGE COMMISSION
 
                                                                    SCHEDULE 3.3


For bulk labelled vials: One full batch equals [*]


For bulk Active Ingredient:  One full batch equals 100g (one hundred grams).

                                       12
<PAGE>
 

                                                                       Exhibit D
                                                                       ---------

                               KEEP WELL AGREEMENT



     Agreement dated as of            , 1998  between Roche Holding Ltd (the
"Parent") and Roche Healthcare Limited (the "Subsidiary").

     WHEREAS the Parent owns directly or indirectly all the capital stock of the
Subsidiary; and

     WHEREAS the Subsidiary proposes to enter into an Asset Purchase Agreement
with Centocor, Inc. (the "Asset Purchase Agreement").

     NOW, THEREFORE, the parties agree as follows:

     1.   Stock Ownership of the Subsidiary. At all times during the term of
          ---------------------------------                                 
this Agreement, the Parent shall directly or indirectly own and hold the entire
legal title to and beneficial interest in all the outstanding shares of stock of
the Subsidiary having the right to vote for the election of members of the Board
of Directors of the Subsidiary and will not directly or indirectly pledge or in
any way encumber or otherwise dispose of any such shares of stock, unless
required to dispose of any or all such shares of stock pursuant to a court
decree or order of any governmental authority which, in the opinion of counsel
to the Parent, may not be successfully challenged.

     2.   Maintenance of Consolidated Net Worth. The Parent agrees that it shall
          -------------------------------------                                 
cause the Subsidiary to have a Consolidated Net Worth of at least U.S.$1,000,000
at all times.

     For purposes of this Agreement, the term "Consolidated Net Worth" shall
mean the excess of total assets of the Subsidiary and its consolidated
subsidiaries over total liabilities of the Subsidiary and its consolidated
subsidiaries, total assets and total liabilities each to be determined in
accordance with generally accepted international accounting principles
consistently applied.

     3.   Waiver. The Parent hereby waives any failure or delay on the part of
          ------                                                              
the Subsidiary in asserting or enforcing any of its rights or in making any
claims or demands hereunder.

     4.   Not a Guarantee. This Agreement is not, and nothing herein contained
          ---------------                                                     
and nothing done pursuant hereto by the Parent shall be deemed to 
<PAGE>
 
constitute, a guarantee by the Parent of the payment of any obligation,
indebtedness or liability, of any kind or character whatsoever, of the
Subsidiary. The only parties to this Agreement are the Subsidiary and the
Parent, and this Agreement shall not confer upon any other person any right or
claim against the Parent.

     5.   Modification, Amendment or Termination. This agreement may be
          --------------------------------------                       
modified, amended or terminated by the written agreement of the parties;
provided, however, that no such modification, amendment or termination shall
have any adverse effect upon the ability of the Subsidiary to meet its
obligations under Section 3.4 and Section 13.7 of the Asset Purchase Agreement
without the written consent of Centocor, Inc.

     6.   Bankruptcy, Liquidation or Moratorium. Any rights and obligations
          -------------------------------------                            
which either of the parties has under this Agreement will remain valid and
binding notwithstanding any bankruptcy or liquidation of, or moratorium
involving, the Subsidiary.

     7.   Rights of the Subsidiary. It is the intention of the parties in
          ------------------------                                       
entering into this Agreement to benefit the Subsidiary, and accordingly the
obligations of the Parent under this Agreement may be enforced exclusively by
the Subsidiary at any time against the Parent.

     8.   Successors. The agreements herein set forth shall be mutually binding
          ----------                                                           
upon, and inure to the mutual benefit of, the Parent and the Subsidiary and
their respective successors.

     9.   Governing Law. This Agreement shall be governed by the laws of Bermuda
          -------------                                                         
(regardless of its or any other jurisdiction's choice of law principles).

                                       2
<PAGE>
 
     IN WITNESS WHEREOF, the parties hereto have caused this Agreement to be 
executed and delivered by their respective officers thereunto duly authorized as
of the day and year first above written.



Roche Holding Ltd                   Roche Healthcare Limited


By:                                 By:
   --------------------------          ---------------------------



By:
   --------------------------

                                       3

<PAGE>
                                                                      Exhibit 11
                                                                      ----------

                         CENTOCOR, INC. AND SUBSIDIARIES
                 COMPUTATION OF EARNINGS (LOSS) PER COMMON SHARE
                   FOR THE THREE YEARS ENDED DECEMBER 31, 1997
                                 (IN THOUSANDS)
<TABLE> 
<CAPTION> 

Computation of Earnings (Loss) Per Common Share


  For the Years ended December 31,                                   1997           1996            1995                 
                                                                  ----------    -----------     -----------                  
<S>                                                               <C>           <C>             <C>    
  Earnings (loss)                                                                                                            
                                                                                                                             
           Income (loss) from continuing operations before                                                                   
             loss on sale of facility, extraordinary gain,                                                                   
             special charges and litigation                          $15,695       ($13,468)       ($51,740)                 
           Loss on sale of facility and related business             ($4,565)             -               -                  
           Net gain on extinguishment of debt                              -            705               -                  
           Special charges                                                 -              -          (1,642)                 
           Litigation settlement                                           -              -          (3,750)                 
                                                                   ----------    -----------     -----------                 
                                                                                                                             
           Net income (loss) available to common stock               $11,130       ($12,763)       ($57,132)                 
                                                                   ==========    ===========     ===========                 
                                                                                                                             
  Shares                                                                                                                     
                                                                                                                             
           Weighted average number of common shares                                                                          
             outstanding                                              69,809         66,475          58,207                  
                                                                   ==========    ===========     ===========                 
                                                                                                                             
           Weighted average common and dilutive                                                                              
             equivalent shares outstanding                            71,770         66,475          58,207                  
                                                                   ==========    ===========     ===========                 
                                                                                                                             
  Basic earnings (loss) per common share:                                                                                    
                                                                                                                             
           Income (loss) from continuing operations before                                                                   
             loss on sale of facility, extraordinary gain,                                                                   
             special charges and litigation                            $0.22          (0.20)         ($0.89)                 
           Loss on sale of facility and related business              ($0.06)             -               -                  
           Net gain on extinguishment of debt                              -           0.01               -                  
           Special charges                                                 -              -           (0.03)                 
           Litigation settlement                                           -              -           (0.06)                 
                                                                   ----------    -----------     -----------                 
                                                                                                                             
           Net earnings (loss)                                         $0.16         ($0.19)         ($0.98)                 
                                                                   ==========    ===========     ===========                 
                                                                                                                             
                                                                                                                             
  Diluted earnings (loss) per common share:                                                                                  
                                                                                                                             
           Income (loss) from continuing operations before                                                                   
             loss on sale of facility, extraordinary gain,                                                                   
             special charges and litigation                            $0.22         ($0.20)         ($0.89)                 
           Loss on sale of facility and related business              ($0.06)             -               -                  
           Net gain on extinguishment of debt                              -           0.01               -                  
           Special charges                                                 -              -           (0.03)                 
           Litigation settlement                                           -              -           (0.06)                 
                                                                   ----------    -----------     -----------                 
                                                                                                                             
           Net earnings (loss)                                         $0.16         ($0.19)         ($0.98)                 
                                                                   ==========    ===========     ===========                 
</TABLE> 

           The computation of basic earnings or loss per share in each period is
           based on the weighted average number of common shares outstanding.
           When dilutive, stock options and warrants are included as share
           equivalents using the treasury stock method and are included in the
           calculation of diluted per share data. Convertible Debentures are not
           considered share equivalents and are not included in the calculation
           of basic or diluted per share data but would be included in the
           calculation of diluted per share data if their effect is dilutive.

<PAGE>



                                                                      Exhibit 12
                                                                      ----------


                         CENTOCOR, INC. AND SUBSIDIARIES
                       STATEMENT RE COMPUTATION OF RATIOS
                       RATIO OF EARNINGS TO FIXED CHARGES
                                 (in thousands)

<TABLE> 
<CAPTION> 

                                                1997              1996              1995              1994              1993
                                            -------------     -------------     -------------     -------------     -------------
      <S>                                   <C>               <C>               <C>               <C>               <C> 
      EARNINGS (LOSS):

      Earnings (loss)                            $11,130          ($12,763)         ($57,132)        ($126,658)         ($74,379)

      PLUS:

      Fixed charges (below)                        5,144             9,648            18,903            21,719            22,820

      LESS:

      Interest capitalized                             -                 -                 -                 -                 -
                                            -------------     -------------     -------------     -------------     -------------

      ADJUSTED EARNINGS (LOSS)                   $16,274           ($3,115)         ($38,229)        ($104,939)         ($51,559)



      FIXED CHARGES:

      Rent expense deemed interest               $ 1,049           $ 1,138           $ 1,191          $  1,187           $ 1,987

      Interest expense                             3,938             8,351            17,001            19,821            20,087

      Amortization of debt issuance cost             157               159               711               711               746

      Interest  capitalized                            -                 -                 -                 -                 -
                                            -------------     -------------     -------------     -------------     -------------

      TOTAL FIXED CHARGES                        $ 5,144           $ 9,648           $18,903          $ 21,719          $ 22,820

      RATIO                                         3.16            *                 *                 *                 *
                                            =============     =============     =============     =============     =============
</TABLE> 



      * Adjusted earnings did not cover fixed charges for the years ended
      December 31, 1996, 1995, 1994 and 1993 by $12,763,000, $57,132,000,
      $126,658,000 and $74,379,000, respectively.


<PAGE>
                                                                      Exhibit 21
                                                                      ----------



                         CENTOCOR, INC. AND SUBSIDIARIES
<TABLE> 
<CAPTION> 
                                                              Jurisdiction of Incorporation
             Subsidiaries of the Registrant                          or Organization
             --------------------------------------        ------------------------------------
<S>                                                        <C> 
      1.     Centocor B.V.                                 The Netherlands

      2.     Centocor Development Corporation III          Delaware

      3.     Centocor Property Management Corp.            Delaware

      4.     Centocor Property Management Corp. II         Delaware

      5.     First Valley Insurance Company                Vermont

      6.     Nippon Centocor K.K.                          Japan

      7.     Centocor (BVI), Inc.                          British Virgin Islands

      8.     Winthorp and Valentine, Inc.                  Delaware

      9.     Centocor Diagnostics of PA                    Pennsylvania

      10.    CDP Investments                               Delaware

      11.    CDP Holdings                                  Delaware

      12.    Centocor Diagnostics, Inc.                    Pennsylvania
</TABLE> 

<PAGE>
                                                                      Exhibit 23

                         Consent of Independent Auditors



The Board of Directors
Centocor, Inc.:

We consent to incorporation by reference in Registration Statement Nos.
33-35729, 33-16286, 33-7311, 33-23481, 33-44231, 33-29142 and 333-07829 on Form
S-3 and in Registration Statement Nos. 33-35731, 2-86486, 33-35730, 33-00167,
33-16285, 33-16284 and 33-23480 on Form S-8 of Centocor, Inc. of our report
dated January 28, 1998, relating to the consolidated balance sheets of Centocor,
Inc. and subsidiaries as of December 31, 1997 and 1996 and the related
consolidated statements of operations, cash flows, shareholders' equity and
related consolidated financial statement schedule for each of the years in the
three-year period ended December 31, 1997, which report appears in the December
31, 1997 Annual Report on Form 10-K of Centocor, Inc.


KPMG Peat Marwick LLP




Philadelphia, Pennsylvania
February 13, 1998

<TABLE> <S> <C>

<PAGE>
<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM CENTOCOR,
INC CONSOLIDATED BALANCE SHEETS AND CONSOLIDATED STATEMENTS OF OPERATIONS IS 
QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<MULTIPLIER> 1,000
       
<S>                             <C>
<PERIOD-TYPE>                   YEAR
<FISCAL-YEAR-END>                          DEC-31-1997
<PERIOD-START>                             JAN-01-1997
<PERIOD-END>                               DEC-31-1997
<CASH>                                          85,565
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                                0
                                          0
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<EPS-PRIMARY>                                      .16
<EPS-DILUTED>                                      .16
        

</TABLE>


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