ICN PHARMACEUTICALS INC
10-Q/A, 1997-01-07
PHARMACEUTICAL PREPARATIONS
Previous: GENEVE HOLDINGS INC, SC 13D, 1997-01-07
Next: REDWOOD TRUST INC, 8-K, 1997-01-07



- ------------------------------------------------------------------------------ 
                                 UNITED STATES

                       SECURITIES AND EXCHANGE COMMISSION

                             WASHINGTON, D.C. 20549

                                    FORM 10-Q/A
          (Amendment Number 1 to Form 10-Q Filed on September 30, 1996)

                                   (Mark One)
[X]            QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15 (D) OF
                                       THE
                         SECURITIES EXCHANGE ACT OF 1934

                For the quarterly period ended SEPTEMBER 30, 1996

                                       OR

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

                         Commission File Number 1-11397,

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

DELAWARE                                                              33-0628076
(State or other jurisdiction of                                 (I.R.S. Employer
incorporation or organization)                               identification No.)

                               3300 Hyland Avenue
                          COSTA MESA, CALIFORNIA 92626
                    (Address of principal executive offices)
                                   (Zip Code)


                                 (714) 545-0100
              (Registrant's telephone number, including area code)


         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
         ----      ----

          The number of  outstanding  shares of the  registrant's  Common Stock,
$.01 par value, as of November 6, 1996 was 33,510,000.
- -------------------------------------------------------------------------------
<PAGE>

ITEM 6.  

Exhibit 10.  Material Contracts
 





     **CERTAIN CONFIDENTIAL MATERIAL CONTAINED IN THIS DOCUMENT HAS BEEN OMITTED
AND FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE  COMMISSION PURSUANT TO 17
C.F.R. SUBSECTION 200.80(B)(4), 200.83 AND 240.24B-2.**











                     EXCLUSIVE LICENSE AND SUPPLY AGREEMENT

                                     between

                            ICN PHARMACEUTICALS, INC.

                                       and

                              SCHERING-PLOUGH LTD.

                                  JULY 28, 1995


















<PAGE>
<TABLE>
<CAPTION>
                                TABLE OF CONTENTS

                                                                          PAGE


<S> <C>        <C>                                                          <C>
 
ARTICLE 1.
    DEFINITIONS ............................................................  2
      1.1       "Affiliate" ................................................  2
      1.2       "Cost of Goods" ............................................  2
      1.3       "CPMP Opinion" .............................................  2
      1.4       "Effective Date"............................................  2
      1.5       "EU"........................................................  3
      1.6       "Exclusive Period" .........................................  3
      1.7       "FDA" ......................................................  3
      1.8       "ICN" ......................................................  3
      1.9       "ICN Facility" .............................................  3
      1.10      "ICN Trademark" ............................................  3
      1.11      "Improvements" .............................................  3
      1.12      "Know-How" .................................................  4
      1.13      "Labelling" ................................................  4
      1.14      "License Period" ...........................................  4
      1.15      "Major Market" .............................................  4
      1.16      "Minimum Labelling" ........................................  4
      1.17      "NDA" ......................................................  4
      1.18      "Net Sales" ................................................  5
      1.19      "Product" ..................................................  6
      1.20      "Product Price" ............................................  7
      1.21      "Product Specifications" ...................................  7
      1.22      "Regulatory Approval" ......................................  7
      1.23      "Schering" .................................................  7
      1.24      "Schering Trademark" .......................................  7
      1.25      "Stock Purchase Agreement" .................................  8
      1.26      "Territory" ................................................  8

ARTICLE 2.      GRANT OF RIGHTS TO SCHERING
      2.1       Grant of Exclusive License ................................   8
      2.2       Acceptance of Appointment .................................   8
      2.3       ICN Retained Rights .......................................   9
      2.4       Prices ....................................................   9
      2.5       Know-How ..................................................   9
      2.6       Approvals; Effective Date .................................  10

ARTICLE 3.      CERTAIN DEVELOPMENT AND REGULATORY MATTERS
                DURING EXCLUSIVE PERIOD ...................................  10
      3.1       Research and Development Activities .......................  10
      3.2       Product Registrations .....................................  13
      3.3       Pricing and Reimbursement Approvals .......................  17
      3.4       Failure to Obtain Approvals; Restrictions .................  17
      3.5       Governmental Inspections ..................................  18
      3.6       Notice of Adverse Reactions ...............................  19
      3.7       Recalls and Market Withdrawals ............................  19
      3.8       Additional Indications ....................................  20
      3.9       Improvements ..............................................  21

<PAGE>
ARTICLE 4.
       CERTAIN OBLIGATIONS OF THE PARTIES
          DURING EXCLUSIVE PERIOD..........................................  22
      4.1     Diligence in Marketing the Product ..........................  22
      4.2     Compliance with Laws ........................................  23
      4.3     Trademark Registrations and
                Infringements .............................................  23

ARTICLE 5.

      5.1     Establishment of Scientific and Commercial Liaison
                   Committees ............................................   26
      5.2     Product Labelling ..........................................   28
      5.3     Product Sampling ...........................................   28

ARTICLE 6.
           COMPENSATION PAYABLE TO ICN; PAYMENT TERMS ....................   29
      6.1     License Fee ................................................   29
      6.2     Royalty Payment ............................................   30
      6.3     Royalty Reduction ..........................................   31
      6.4     Product Price to Schering ..................................   31
      6.5     Royalty Payment Dates ......................................   32
      6.6     Direct Affiliate Licenses, Supporting Licenses and
                  Compulsory Royalties ...................................   32
      6.7     Place of Royalty Payment & Currency Conversions ............   33
      6.8     Royalties on Resales .......................................   34
      6.9     Duration of Royalty Payments ...............................   34
      6.10    Maintenance of Royalty Records; Audit Rights ...............   34
      6.11    Equity Purchase ............................................   36
      6.12    Withholding Taxes, etc .....................................   36

ARTICLE 7.
          ICN'S MARKETING RIGHTS; DISTRIBUTION                               36
      7.1     ICN's Marketing Rights .....................................   36
      7.2     Distribution ...............................................   37
      7.3     Ireland Sales ..............................................   38

ARTICLE 8.
          SUPPLY OF PRODUCT BY ICN DURING EXCLUSIVE PERIOD ...............   39
      8.1     Supply .....................................................   39
      8.2     Forecasts and Procedures ...................................   39
      8.3     Schering's Right to Manufacture ............................   42
      8.4     Limited Warranty ...........................................   43
      8.5     Rejection of Product .......................................   44

ARTICLE 9.
          CONFIDENTIALITY                                                    45
      9.1     Confidentiality ............................................   45
      9.2     No Publicity ...............................................   46

ARTICLE 10.
          REPRESENTATIONS AND WARRANTIES                                     46
     10.1     Representations and Warranties of
                Each Party ...............................................   46
     10.2     ICN'S Representations ......................................   47
     10.3     Continuing Representations .................................   50
     10.4     No Inconsistent Agreements .................................   50

ARTICLE 11.
          INDEMNIFICATION AND LIMITATION ON LIABILITY                        50
     11.1     Indemnification by Schering ................................   50
     11.2     Indemnification by ICN .....................................   51
     11.3     Conditions to Indemnification ..............................   51
     11.4     Settlements ................................................   52
     11.5     Limitation of Liability ....................................   52
     11.6     Insurance ..................................................   52


<PAGE>
ARTICLE 12. TERM AND TERMINATION                                             52
    12.1     Term of Agreement ...........................................   52
    12.2     Termination by Either Party .................................   53
    12.3     Continuing Obligations ......................................   53
    12.4     Partial Termination of Territory by ICN .....................   54
    12.5     Effects of Termination by Schering ..........................   54
    12.6     Effects of Termination by ICN ...............................   56
    12.7     Change of Control ...........................................   56
    12.8     Remedy Not Exclusive ........................................   57

ARTICLE 13.
     DISPUTE RESOLUTION ..................................................   57

ARTICLE 14.
     PROVISION FOR INSOLVENCY ............................................   62

ARTICLE 15.
     MISCELLANEOUS .......................................................   64
    15.1     Assignment ..................................................   64
    15.2     Governing Law ...............................................   64
    15.3     Waiver ......................................................   64
    15.4     Independent Relationship ....................................   64
    15.5     Export Control ..............................................   65
    15.6     Entire Agreement; Amendment .................................   65
    15.7     Notices .....................................................   65
    15.8     Force Majeure ...............................................   66
    15.9     Non-Solicitation ............................................   67
    15.10    Severability ................................................   67
    15.11    Counterparts ................................................   67

Exhibit A

    Cost of Goods ........................................................  A-1

Exhibit B

    Product Specifications ...............................................  B-1

Exhibit C

    Stock Purchase Agreement .............................................  C-1

Exhibit D

    Research and Development Plans .......................................  D-1

Exhibit E

    Adverse Event Reporting Procedures ...................................  E-1

Exhibit F

    Publication Procedures ...............................................  F-1

Exhibit 2.1

    License Agreements
</TABLE>
<PAGE>
1

                     EXCLUSIVE LICENSE AND SUPPLY AGREEMENT

          This EXCLUSIVE  LICENSE AND SUPPLY AGREEMENT  ("Agreement") is made as
of  July  28,  1995,  by and  between  ICN  PHARMACEUTICALS,  INC.,  a  Delaware
corporation ("ICN"), and SCHERING-PLOUGH LTD., a corporation organized under the
laws of Switzerland  ("Schering"),  each on behalf of itself and its Affiliates.
ICN and Schering are sometimes referred to herein  individually as a "Party" and
collectively as the "Parties."

          WHEREAS, ICN has developed  ribavirin,  an oral antiviral product; and
WHEREAS,  Schering  wishes  to  obtain a license  to use the  know-how  and data
developed by ICN concerning ribavirin; and

          WHEREAS,  Schering  wishes to market,  sell and distribute the Product
(as  hereinafter  defined) for the  treatment  of chronic  hepatitis C under the
terms and conditions of this Agreement; and

          WHEREAS,  ICN wishes to grant  Schering such right under the terms and
conditions of this Agreement and any and all exhibits hereto.

          NOW,  THEREFORE,  in  consideration  of the mutual promises  contained
herein and  intending to be legally bound  hereby,  the Parties  hereby agree as
follows:
<PAGE> 
2
                                    ARTICLE I
                                   DEFINITIONS

          As used in this Agreement,  the following capitalized terms shall have
the meanings set forth below.  Capitalized  terms in this  Agreement used in the
plural shall have the meaning as for the singular and vice versa.

          1.1 "Affiliate"  means any individual or entity directly or indirectly
controlling,   controlled  by  or  under  common  control  with,  the  specified
individual  or entity.  For purposes of this  Agreement,  the direct or indirect
ownership of over 50% of the outstanding  voting securities of an entity, or the
right to receive  over 50% of the  profits  or  earnings  of an entity  shall be
deemed to  constitute  control.  Such other  relationship  as in fact results in
actual  control over the  management,  business and affairs of an entity,  shall
also be deemed to constitute control.
   
          1.2 "Cost of Goods" means the cost to ICN or Schering, as the case may
be, of Products shipped in finished bulk capsules.  As used herein,  the cost of
the Product  means (i) in the case of products and services  acquired from third
parties,  payments  made  to  such  third  parties,  and  (ii)  in the  case  of
manufacturing  services  performed  by  the  Parties,   including  manufacturing
services  in  support of third  party  manufacturing,  the actual  unit costs of
manufacture in bulk form or final manufacturing, as the case may be. Actual unit
costs  shall  consist  only of direct  material  and  direct  labor  costs  plus
manufacturing  overhead  directly  attributable to the Product at standard cost,
all  calculated  in  accordance  with   reasonable   cost  accounting   methods,
consistently  applied,  of the party  performing the work, and as more fully set
forth on Exhibit A hereto.
    

          1.3  "CPMP  Opinion"  means a final,  written  majority  or  unanimous
positive  opinion by the  committee  on  Proprietary  Medicinal  Products of the
European Community ("CPMP"), or any successor to the CPMP.
<PAGE>
 3

          1.4  "Effective  Date"  means  the  receipt  of  requisite  boards  of
directors'  approvals and  expiration or earlier  termination  of any notice and
waiting period under the Hart-Scott-Rodino  Antitrust  Improvements Act of 1976,
as amended.

          1.5 "EU" means each of the  countries  of the  European  Union (or its
successor),  which currently include Austria,  Belgium, United Kingdom, Denmark,
Finland,  France,  Germany,  Greece, Ireland,  Italy,  Luxembourg,  Netherlands,
Portugal, Spain and Sweden, as such membership may change from time to time, and
includes  countries upon their  admission for full membership  (with  commercial
rights  and  privileges  substantially  comparable  to  those  of the  foregoing
countries); provided, however, that for purposes of this Agreement, if a country
is or  becomes a member of the  European  Union (or its  successor)  at any time
during the Exclusive Period,  such country shall be deemed to be included in the
EU even if such  country  in fact  withdraws  from or is  otherwise  no longer a
member of the European Union (or its successor).

          1.6  "Exclusive  Period" means the period  commencing on the Effective
Date and continuing until the earlier of (i) the tenth  anniversary of the first
commercial  sale of the Product in the last country in the Major Market in which
the Product was introduced into commerce,  or (ii) the fifteenth  anniversary of
the Effective Date,  unless  terminated  earlier in accordance with Section 12.2
hereof.

          1.7 "FDA" means the United States Food and Drug  Administration or any
corresponding foreign drug registration governmental authority, or its successor
agency.

          1.8 "ICN" means ICN Pharmaceuticals, Inc.

          1.9 "ICN  Facility"  means the facility or facilities  (which may be a
third  party  facility or  facilities)  used by ICN for the  manufacture  of the
Product to meet Schering's supply requirements under this Agreement.

          1.10 "ICN Trademark" means Virazole and any and all variations thereof
and/or  substitute  marks  proposed,  chosen,  owned or controlled by ICN or its
Affiliates for use with the Product in the Territory.

          1.11  "Improvements"  means any change with respect to the Product for
use in the treatment of chronic hepatitis C, including without  limitation,  any
change in formulation,  dosage or mode of delivery,  any additional  indications
and any  change in the  Product  resulting  from a change  in the  manufacturing
process.
<PAGE>
 4

          1.12  "Know-How"  means all  ideas,  inventions,  data,  instructions,
package inserts,  promotional  materials (after  commercial  launch),  know-how,
processes,  formulas, expert opinion and information (whether or not patented or
patentable),  technology and other intellectual  property (including patents and
any pending  patent  applications,  but  excluding the ICN  Trademark)  owned or
controlled by ICN and its Affiliates, or under which ICN and its Affiliates have
the right to grant  sublicenses,  on the Effective  Date or during the Exclusive
Period, as all of the foregoing relate to the discovery, research,  development,
manufacture,  marketing,  use or sale of Product  for the  treatment  of chronic
hepatitis  C,  including,   without   limitation,   all  biological,   chemical,
pharmacological,   toxicological,   pharmaceutical,   physical  and  analytical,
clinical, safety, manufacturing and quality control data and information related
thereto,  all correspondence  with the FDA relating to the Product and all other
documents pertaining to communications with the FDA (including,  but not limited
to,  minutes  of any  FDA  communications  relating  to  the  Product)  and  all
applications for Regulatory Approval.

   
          1.13  "Labelling"  means the bottle label, the package inserts and the
packaging for the Product sold in the Territory, including, where applicable the
Minimum Labelling.
    
          1.14  "License  Period"  means the period  commencing on the Effective
Date and continuing in perpetuity thereafter.
   
          1.15 "Major Market" means each of France, Germany, Italy, Spain, the
United Kingdom, the United States and Japan.
    
          1.16 [REDACTED]
               (i)   [REDACTED].
               (ii)  [REDACTED].
<PAGE>
 5
          1.17 "NDA" means a New Drug Application,  Product License  Application
or its equivalent in the United States or any corresponding foreign application,
registration  or  certification  for approval to market the  Product,  including
where applicable,  applications for pricing,  pricing reimbursement approval and
Labelling.

   
          1.18 "Net Sales" means, with respect to each country in the Territory,
the proceeds  actually  received by Schering or its  Affiliates  on all sales of
Product to an  unaffiliated  third party (whether an end-user,  a distributor or
otherwise)  including  prelicense  sales of the Product made prior to Regulatory
Approval,  and exclusive of  intercompany  transfers or sales in the  Territory,
less the  reasonable  and  customary  accrual-basis  deductions  from such gross
amounts including:  (i) normal and customary trade, cash and quantity discounts,
allowances and credits;  (ii) credits or allowances actually granted for damaged
goods, returns or rejections of Product and retroactive price reductions;  (iii)
sales or similar taxes (including  duties or other  governmental  charges levied
on,  absorbed or  otherwise  imposed on the sale of Product  including,  without
limitation,  value added taxes or other governmental  charges otherwise measured
by the  billing  amount,  when  included in  billing);  (iv)  freight,  postage,
shipping,  customs  duties  and  insurance  charges;  (v) with  respect to sales
outside the EU only,  charge back payments and rebates granted to managed health
care organizations or to federal,  state and local governments,  their agencies,
and purchasers and reimbursers or to trade customers,  including but not limited
to,  wholesalers and chain and pharmacy buying groups; and (vi) commissions paid
to third parties other than sales  personnel and sale  representatives  or sales
agents. For purposes of calculating Net Sales under this Agreement, all sales of
Product  hereunder,  whether made for cash or  otherwise,  shall be deemed to be
made for cash, at the applicable fair market value of the Product.
    
          In the event that Product is sold in the form of a combination product
containing one or more active  ingredients  other than  ribavirin  ("Combination
Product"),  Net  Sales  for  such  Combination  Product  will be  calculated  by
multiplying actual Net Sales of such Combination Product by the fraction A/(A+B)
where A is the invoice price of the Product if sold  separately by Schering,  an
Affiliate or sublicensee and containing  ribavirin as the only active ingredient
and B is the invoice  price of any other active  component or  components in the
Combination Product if sold separately by Schering, an Affiliate or sublicensee.
In the  event  that the  Product  is sold in the form of a  Combination  Product
containing one or more active  ingredients  other than ribavirin and one or more
such active ingredients of the Combination Product are not sold separately, then
the above  formula  shall be  modified  such  that A shall be the total  cost to
Schering,  its Affiliate or  sublicensee of the Product and B shall be the total
cost to Schering,  its Affiliate or sublicensee of any other active component or
components in the combination.

<PAGE>
 6
          1.19  "Product"  means any oral product  containing as its sole active
ingredient ribavirin and any Improvements thereto. The term "Product" also shall
include any  pharmaceutical  product for the  treatment  of chronic  hepatitis C
containing  oral  ribavirin  in  combination  with  another  active  ingredient;
provided,  however,  that nothing in this Agreement  shall be deemed to grant to
ICN any rights or license to recombinant interferon alfa 2b.

<PAGE>
 7

          1.20 "Product Price" has the meaning specified in Section 6.4 hereof.

          1.21 "Product Specifications" means the general specifications for the
Product  set forth as Exhibit B hereto,  as such may be  modified  to reflect an
Improvement.  The  Product  Specifications  also  shall be  supplemented  and/or
modified from time to time to the extent required by any regulatory authority in
the Territory  with respect to obtaining or  maintaining a Regulatory  Approval,
and may otherwise be modified only by the written agreement of ICN and Schering.
The Product Specifications and any supplements or modifications thereto shall be
documented  in  such  reasonable   level  of  detail  as  is  customary  in  the
pharmaceutical industry

          1.22 "Regulatory Approval" means the technical, medical and scientific
licenses, registrations,  authorizations and/or approvals of the Product for the
treatment  of  chronic  hepatitis  C in  combination  therapy  with  recombinant
interferon alfa 2b or as monotherapy and the marketing authorizations based upon
such  approvals   (including  any   prerequisite   manufacturing   approvals  or
authorizations  related  thereto)  that are required or deemed  necessary by any
national,  supra-national  (e.g., the European  Commission or the Council of the
European Union), regional, state or local regulatory agency, department,  bureau
or other governmental  entity in the Territory,  including the CPMP Opinion,  if
applicable,  and any pricing, third party reimbursement  approvals and Labelling
approvals as necessary for the manufacture, distribution, use or sale of Product
in a regulatory jurisdiction.

          1.23 "Schering" means Schering-Plough Ltd.

          1.24  "Schering  Trademark"  means  any and all  trademarks  proposed,
chosen,  owned or  controlled  by  Schering or its  Affiliates  for use with the
Product in the Territory.
<PAGE>
 8

          1.25 "Stock Purchase Agreement" means the Stock Purchase Agreement, in
the  form  attached   hereto  as  Exhibit  C,  providing  for  the  purchase  by
Schering-Plough Corporation of certain common stock of ICN.

          1.26 "Territory" means the entire world.


                                    ARTICLE 2

                           GRANT OF RIGHTS TO SCHERING

          2.1 Grant of Exclusive License.  Subject to the other applicable terms
and  conditions  of this  Agreement,  ICN hereby  grants to Schering,  as of the
Effective Date, (a) the exclusive licenses,  exclusive even with respect to ICN,
to make, have made, develop,  use, sell and distribute Product for the treatment
of chronic  hepatitis C, in each country in the  Territory  during the Exclusive
Period (1) under the Know-How and (2) at Schering's option, under either the ICN
Trademark or the Schering Trademark, and (b) the non-exclusive license in and to
the  Know-How to enable  Schering to make,  have made,  develop,  use,  sell and
distribute the Product for the treatment of chronic hepatitis C in the Territory
during the License Period.  The exclusive  licenses  granted in this Section 2.1
(i) are  subject to the rights of ICN  retained by or reserved to ICN under this
Agreement,  including without limitation,  the rights to manufacture the Product
and to  distribute,  market and sell the Product as provided  for in Section 7.1
hereof;  (ii) do not include the right to  sublicense,  except to  Affiliates of
Schering; (iii) shall prohibit ICN from selling the Product for the treatment of
chronic   hepatitis  C  through  any   distributorship   agreements,   marketing
arrangements or similar  agreements  other than those in effect on the Effective
Date and set forth in  Exhibit  2.1  hereto;  and (iv) shall  prohibit  ICN from
selling  ribavirin  in bulk  form  to any  third  parties  (except  pursuant  to
agreements  relating to  respiratory  syncytial  virus and those  agreements set
forth on Exhibit 2.1).

          2.2 Acceptance of Appointment.  Subject to the other  applicable terms
and conditions of this Agreement,  Schering hereby accepts the granted  licenses
and agrees to serve as ICN's exclusive  licensee of the Product in the Territory
during the  Exclusive  Period  (except for ICN's rights  under  Sections 2.1 and
7.1), and as ICN's non-exclusive licensee of the Product in the Territory during
the License  Period,  to sell the Product in  accordance  with the terms of this
Agreement.

<PAGE>
 9

          2.3 ICN Retained  Rights.  During the License Period,  ICN retains all
rights to the  Product  in the  Territory  that are not  explicitly  granted  to
Schering under this  Agreement.  Without in any way limiting the foregoing,  ICN
retains,  both during and after the License Period,  all rights in the Territory
for  products  owned or  controlled  by it other  than the  Product,  including,
without  limitation,  the right to  distribute,  market  and sell any such other
product in the Territory  (e.g.  lyophilized  ribavirin,  or cream,  ointment or
liquid  ribavirin).  Except for such  retained  rights or as expressly  provided
elsewhere  in this  Agreement,  nothing in this  Section  2.3 shall be deemed to
compromise or limit the exclusive license granted to Schering under Section 2.1.

          2.4 Prices. During the Exclusive Period,  Schering shall have the sole
authority to determine the price, payment terms, discounts, allowances and other
terms of sale  extended by Schering to third party  purchasers of the Product in
the Territory.  Nothing in this Section 2.4 or elsewhere in this Agreement shall
be deemed to limit or restrict ICN in any way with respect to its sole authority
to determine the price, payment terms, discounts,  allowances and other terms of
sale extended by ICN to third party purchasers of the Product in the EU.

          2.5 Know-How.  ICN shall furnish Schering promptly after the Effective
Date all Know-How which is necessary or useful to enable Schering to exploit its
rights  under this  Agreement.  ICN shall  promptly  identify  to  Schering  and
disclose to Schering,  during the Exclusive  Period,  all  additional  Know-How,
which could  relate to making,  developing,  using or selling  Product  licensed
hereunder,  to which  ICN or its  Affiliates  have or  obtain  rights,  and such
Know-How  shall be  automatically  deemed to be within the scope of the licenses
herein granted without payment of any additional compensation. ICN shall provide
reasonable  technical  assistance  at no additional  cost to enable  Schering to
utilize such  additional  Know-How if Schering  elects to do so;  provided  that
Schering shall promptly reimburse ICN for any out-of-pocket expenses incurred by
ICN in providing such assistance.

<PAGE>
 10

          2.6 Approvals; Effective Date.

          (a) Promptly  after  execution of this  Agreement,  the Parties  shall
proceed diligently to make all appropriate  filings under the  Hart-Scott-Rodino
Antitrust Improvements Act of 1976, as amended ("HSR"), and to proceed to obtain
necessary  approvals  under HSR,  including but not limited to the expiration or
earlier  termination of any and all applicable  waiting periods  required by the
HSR. In addition the Parties shall  proceed to obtain any other  authorizations,
approvals and permits, if any, required for the consummation of the transactions
contemplated by this Agreement and the Stock Purchase Agreement.

          (b) If the  Effective  Date does not occur by December 15, 1995,  then
either Party (or Schering-Plough  Corporation, in the case of the Stock Purchase
Agreement) may terminate this Agreement and the Stock Purchase Agreement on five
day's notice to the other  Party,  in which event each such  agreement  shall be
terminated  and all  provisions  of each such  agreement  shall be of no further
force or effect.

                                   ARTICLE 3

                   CERTAIN DEVELOPMENT AND REGULATORY MATTERS
                            DURING EXCLUSIVE PERIOD

          3.1 Research and Development Activities.
   
          (a) Following the Effective  Date,  Schering or its  Affiliates  shall
assume and incur all costs and  expenses in  connection  with the  research  and
development  activities  which in its sole  judgment are necessary to obtain any
CPMP Opinion or Regulatory  Approval for the Product for the chronic hepatitis C
indication  in  the  Territory.  ICN  shall  supply  Schering  with  all  of its
requirements of Product for such research and development activities in finished
bulk  capsules,  and bulk  substance as necessary  for  preclinical  studies,  [
REDACTED ]. During the Exclusive Period, Schering shall also be responsible,  at
its  cost  and  expense,   for  all  preclinical   studies,   pre-marketing  and
compassionate use programs,  clinical trials,  chemistry/pharmacy data, any post
approval  studies  required  as a condition  of  obtaining  any CPMP  Opinion or
Regulatory  Approval for the Product for the chronic  hepatitis C indication  in
the  Territory,  and any other  information  and data required as a condition of
obtaining  any CPMP  Opinion or  Regulatory  Approval  for the  Product  for the
chronic  hepatitis C indication in the  Territory.  The studies  which  Schering
intends to  undertake,  together with  preliminary  timetables  and  preliminary
budgets,  are set forth in Exhibit D attached hereto and incorporated  herein by
reference.  Schering shall commence, within  45  days  after the Effective Date,
the  activities  necessary  to obtain  Regulatory  Approval in the EU, and shall
diligently  pursue and conduct such  activities  as may be necessary in order to
obtain  regulatory  Approval  for  the  Product  for  the  chronic  hepatitis  C
indication in each country in the Territory, in accordance with Section 3.2.
    
<PAGE>
 11

          (b) During the Exclusive  Period,  ICN shall assist Schering from time
to time, at Schering's  reasonable  request, in the design and implementation of
clinical  studies,  if Schering  chooses,  to undertake  such studies for a CPMP
Opinion or Regulatory  Approval for the chronic  hepatitis C indication  for the
Product.  ICN shall assist  Schering at Schering's  reasonable  request,  in the
identification  of clinical  study sites in the  Territory,  the  recruitment of
investigators,  the review of study protocols and the monitoring of the clinical
studies  (to the  extent  feasible  in  conjunction  with  ICN's  own  scheduled
monitoring  for  studies  related to its other  products,  without  the need for
additional   resources).   Schering  shall  reimburse  ICN  for  its  reasonable
out-of-pocket  costs  and  expenses  (equitably  prorated,  if  applicable,  for
monitoring  expenses)  incurred in rendering such  assistance,  unless otherwise
agreed by ICN. ICN shall invoice Schering for such expenses,  and, upon request,
shall provide documentation for the invoice. The invoice shall be payable to ICN
or its designee(s) thirty (30) days after receipt by Schering of the invoice.

          (c) During the Exclusive Period, Schering shall be responsible for any
quality  of life,  cost-benefit,  cost-effectiveness,  pharmacoeconomic  and any
other  studies (or portions of studies)  necessary or desirable  for pricing and
reimbursement  approvals in the Territory,  as well as any pre-marketing studies
prior to Regulatory  Approval and post-marketing  studies conducted  following a
Regulatory Approval.  ICN shall assist Schering from time to time, at Schering's
reasonable request, with incidental support in the conduct of the studies.

          (d) All data obtained by Schering or ICN which is reasonably available
to be reported from any activities  conducted under Section  3.1(a),  (b) or (c)
shall be jointly owned by the Parties,  and Schering and ICN shall each have the
right to use all such data for all  purposes  contemplated  or permitted by this
Agreement. Notwithstanding such joint ownership, any such data shall be subject
to the  publication  procedures  set  forth  in  Exhibit  F.  ICN  will  use its
reasonable  efforts to apply such procedures to any studies that commenced prior
to and are planned as of the Effective Date.

          (e)  Schering  shall  have  the  right  to use  for  all  purposes  in
connection with obtaining  Regulatory  Approval for the Product in the Territory
for the treatment of chronic  hepatitis C, all existing  data  relating  thereto
owned, controlled or in the possession of ICN as of the Effective Date.
<PAGE>
 12
          (f) The Parties recognize that ICN's development  studies with respect
to other  indications of the Product  should not interfere with the  development
activities  conducted  by  Schering  with  respect to the  chronic  hepatitis  C
indication. Accordingly:

               (i)  ICN shall  promptly  disclose  to  Schering  all  studies in
                    progress and planned as of the  Effective  Date  relating to
                    the Product in connection  with any  hepatitis  indications;
                    

               (ii) If Schering  determines in its reasonable  business judgment
                    that the  continuation  of any  such  studies  by ICN  would
                    significantly interfere with Schering's studies with respect
                    to chronic hepatitis C, Schering may require ICN to postpone
                    such  studies  for so long as is  necessary  such that ICN's
                    continuation   of  its  studies  would  not  interfere  with
                    Schering's studies,  but such postponement shall not be more
                    than [REDACTED];
   
               (iii)If  after  the  Effective  Date ICN  wishes  to  commence  a
                    clinical development program for the Product for a hepatitis
                    indication  other than the chronic  hepatitis C  indication,
                    then ICN shall  consult  with  Schering  with respect to the
                    possible joint  development of such indication.  If Schering
                    declines or  does  not agree within  30 days  to participate
                    in such a joint development program,  then ICN shall be free
                    to continue such development.  If Schering determines in its
                    reasonable  business  judgment that the  continuation of any
                    such  studies  by ICN  would  significantly  interfere  with
                    Schering's  studies  with  respect to chronic  hepatitis  C,
                    Schering  may require ICN to  postpone  such  studies for so
                    long as is  necessary  such that ICN's  continuation  of its
                    studies would not interfere  with  Schering's  studies,  but
                    such postponement shall not be more than [REDACTED].
    
<PAGE>
 13

          3.2 Product Registrations.
   
          (a)  Schering shall be  responsible,  at its cost and expense,  and in
               its sole judgment,  for determining  the  appropriate  regulatory
               strategy,  and  for  obtaining  and  maintaining  all  Regulatory
               Approvals  for the sale of the Product in the  Territory,  except
               for costs and expenses to be borne by ICN with respect to its own
               Regulatory  Approval  in the EU as  provided  in this  Agreement.
               Schering  shall use its reasonable  efforts to diligently  obtain
               Regulatory  Approvals with Minimum Labelling within the Territory
               and in any event shall file for such Regulatory Approvals in each
               country in the Major Market within nine months of the  completion
               of clinical trials and studies  required in each such country for
               Regulatory  Approval,  including any  additional or  supplemental
               clinical trials or studies subsequently  required by a regulatory
               authority  for such  Regulatory  Approval.  For  purposes of this
               Section 3.2, "completion of clinical trials" shall in no event be
               deemed  to occur  sooner  than the  time of  availability  of the
               integrated  summary of safety reports and  integrated  summary of
               efficacy  reports.  Schering  shall  use  reasonable  efforts  to
               complete  such reports  promptly  after  completion of treatment.
               With respect to countries in the  Territory  other than the Major
               Market,  Schering's  efforts  shall be  commensurate  with  those
               efforts used to pursue  regulatory  approval for its own products
               of  similar  potential,  value and  status in such  country  or a
               comparable  country in the Territory,  as the case may be, or, if
               Schering  has no such similar  products in a comparable  country,
               Schering's  efforts shall be  commensurate  with the efforts that
               other reputable  pharmaceutical  companies of comparable size and
               product  portfolio would use with respect to a product of similar
               potential,  value and status in such country.  In connection with
               any  health  registration  application  of  ICN  relating  to the
               Product  pending as of the Effective Date with the CPMP or FDA or
               any  successor  to the  CPMP or FDA,  ICN  shall,  at  Schering's
               request,  provide to Schering in a prompt manner, but in no event
               later than December 31, 1995, responses to non-clinical questions
               which have been  raised by the CPMP or FDA. In  addition,  at the
               request   of   Schering,    ICN   shall   provide   to   Schering
               chemistry-pharmacy data and any other technical information which
               Schering  may  reasonably  require  in order to  obtain  any CPMP
               Opinion or Regulatory  Approval for the Product in the Territory.
               At the request of Schering, ICN may agree to continue its current
               efforts, and undertake where necessary and commercially

<PAGE>
 14

               practicable  additional  efforts,  including  clinical  trials in
               addition  to  those   already  in   progress,   to  maximize  the
               opportunities  of Schering  to obtain  Regulatory  Approval  with
               Minimum Labelling in each country in the Territory at the time of
               initial  Regulatory   Approval  in  such  country,   or  as  soon
               thereafter as possible.  All costs incurred by ICN in making such
               efforts  shall be  included  in the costs  incurred  in  pursuing
               Regulatory    Approval   for   purposes   of   Section    3.2(e).
               Notwithstanding the foregoing, ICN acknowledges that there can be
               no  assurance  that  Minimum  Labelling  will be  obtained in any
               country in the Territory.  ICN shall advise and assist  Schering,
               upon  request,  in the CPMP  process  and the local  registration
               process.
    
          (b)  Except as to the EU, each Regulatory  Approval shall be placed in
               Schering's  name or the name of a designated  Schering  Affiliate
               unless  local  law  requires  (whether  because  of  the  Product
               Labelling   provisions  of  this  Agreement,   pricing   approval
               requirements, or otherwise), or ICN and Schering otherwise agree,
               that a Regulatory  Approval be in the name of ICN or a designated
               ICN  Affiliate.  In  such  event,  Schering  shall  transfer  the
               Regulatory  Approval  to ICN upon  request  at any  time  that is
               commercially  reasonable,  or as  soon  thereafter  as and to the
               extent  permitted  by law. ICN agrees that  notwithstanding  such
               transfer of Regulatory  Approval  from Schering to ICN,  Schering
               shall retain the exclusive  rights to make,  have made,  develop,
               use,  sell  and  distribute  Product  under  the  terms  of  this
               Agreement.
<PAGE>
 15
          (c)  In  the  EU,  the  Parties  shall  each  file   applications  for
               Regulatory Approval in its own name and shall each be responsible
               for  its own  filing  fees.  Schering  shall  use its  reasonable
               efforts to provide ICN on a timely basis with all reports,  data,
               samples (if  necessary),  and,  if  specifically  requested  by a
               regulatory authority,  other information,  necessary to allow ICN
               to file  for  Regulatory  Approval  in the EU  concurrently  with
               Schering.

          (d)  Prior to  Regulatory  Approval of the Product in each  country in
               the  Territory,  each Party shall  promptly  furnish to the other
               Party's designated regulatory representative all data, and a copy
               of all  material  correspondence  and other  material  documents,
               received  or  sent to the FDA or a  regulatory  authority  in the
               Territory relevant to such Regulatory Approval.
   
          (e)  ICN shall  reimburse  Schering  for  [REDACTED],  up to a maximum
               amount of [REDACTED]  to be reimbursed by ICN, of the  reasonable
               costs and  expenses  incurred by Schering in pursuing  Regulatory
               Approval in the EU for clinical and preclinical  trials performed
               in the EU specifically  required for EU Regulatory Approval,  and
               for regulatory  costs required for EU Regulatory  Approval (other
               than each Party's  filing  fees,  which shall be for the Parties'
               respective  accounts);  provided,  however,  that such  costs and
               expenses  shall exclude the cost of any studies  performed in the
               EU or  otherwise  which  are  not  specifically  required  for EU
               Regulatory Approval.  Schering shall invoice ICN after the end of
               each calendar  quarter  commencing  September 30, 1995, for ICN's
               share of such costs and  expenses,  and shall  provide ICN with a
               statement of such costs and  expenses,  describing  the costs and
               expenses  in  reasonable  detail.  If ICN  fails  to pay any such
               invoice (or, in the event of a good faith dispute with respect to
               such invoice,  fails to pay the amount of the invoice into escrow
               in accordance  with the  provisions of this Section  3.2(e)),  by
               l7:00  Lucerne  time  on  the 90th day  after  the date on which
               it is received by ICN, then the royalties that would otherwise be
               due to ICN  for Net  Sales  of the  Product  in the EU  shall  be
               permanently  reduced to  [REDACTED]  of the  amounts set forth in
               Article 6. If,  following  such a failure to pay an invoice,  ICN
               fails to pay a second  invoice  (or, in the event of a good faith

<PAGE>
 16
               dispute with respect to such invoice,  fails to pay the amount of
               the invoice into escrow in accordance with the provisions of this
               Section 3.2(e)),  by 17:00 Lucerne time on the 90th day after the
               date on which it is received by ICN,  then at 17:00  Lucerne time
               on the 90th day day  after the date on which  ICN  received  such
               second invoice,  the rights granted to Schering by this Agreement
               as to the EU shall become exclusive, even as to ICN. In the event
               of a good faith  dispute as to any invoice  rendered  pursuant to
               this  Section  3.2(e),  ICN may deposit the amount of the invoice
               with an independent third party escrow agent mutually  acceptable
               to  the  Parties,   in  an  interest-bearing   account,   pending
               resolution  of such  dispute.  In such event,  the Parties  shall
               promptly  negotiate  in good faith in an  attempt to resolve  any
               such dispute;  provided,  however, that if the Parties are unable
               to resolve  such  dispute  within 30 days after the date on which
               payment of the invoice was due, such dispute shall be resolved in
               accordance  with the provisions of Article 13. Upon resolution of
               such dispute, the interest,  if any, earned on the amount held in
               escrow shall  belong to the Party  entitled to receive the amount
               in escrow,  appropriately  allocated  for any  allocation  of the
               principal amount in escrow.  ICN, through its independent  public
               accountants,  shall  have the  right at  reasonable  times and on
               reasonable  notice to audit the books and records of Schering for
               the purpose of verifying  the costs and  expenses  charged to ICN
               under this Section  3.2(e) in accordance  with and subject to the
               procedures set forth in Section 6.10(a).
    

<PAGE>
17

          3.3 Pricing and Reimbursement Approvals.

          (a)  Schering shall be responsible  for obtaining and  maintaining any
               pricing  and  reimbursement  approvals  required  for the sale by
               Schering of the Product in each country in the Territory.  In the
               EU, ICN shall be responsible for ICN's pricing and  reimbursement
               approvals  and  structure.  Schering  shall  use  its  reasonable
               efforts to diligently obtain pricing and reimbursement  approvals
               for the Product in each country  within the Territory  throughout
               the Exclusive Period,  except as provided in the last sentence of
               Section  4.1.  Schering  shall  undertake   reasonable   efforts,
               including  additional  studies  of the  type  contemplated  under
               Section  3.1(c),  to  diligently  maximize the  opportunities  to
               obtain  commercially  reasonable  pricing for the Product in each
               country in the  Territory  by the time of  initial  launch of the
               Product in such country.  Such efforts shall be commensurate with
               those efforts used for its other  products of similar  potential,
               value  and  status  in  such  country  or,  if  Schering  has  no
               comparable  product in such country,  a comparable country in the
               Territory.

          (b)  Except as to the EU,  each  pricing  and  reimbursement  approval
               shall be placed in  Schering's  name or the name of a  designated
               Schering Affiliate unless local law requires, or ICN and Schering
               otherwise  agree,  that such  approval be in the name of ICN or a
               designated  ICN Affiliate.  In the EU, pricing and  reimbursement
               approvals  shall be  placed  separately  in the  names of ICN and
               Schering, or their respective designated Affiliates.

          3.4 Failure to Obtain Approvals; Restrictions.
   
          (a)  If Schering does not file for Regulatory  Approval in any country
               or countries  in the Major Market as required by Section  3.2(a),
               the  rights  granted  to  Schering  under  this  Agreement  shall
               automatically terminate in such country or countries. If Schering
               does not file for Regulatory Approval in any country or countries
               in the  Territory  (other  than the Major  Market) as required by
               Section 3.2(a), then ICN at any time may notify Schering that ICN
               intends  to  pursue  Regulatory   Approval  in  such  country  or
               countries  within  90 days after  the date of such notice by ICN
               to Schering.  Schering shall have the right,  by giving notice to
               ICN within  30 days  after  receipt of  such notice from ICN, to
               elect to pursue Regulatory Approval in such country or countries;
               provided,  however, that if Schering does not file for Regulatory
               Approval in such  country or countries as required by Section 3.2
               within  60  days  after its  notice to ICN, the rights granted to
               Schering under this Agreement  shall  automatically  terminate in
               such  country or  countries.  If Schering  does not  exercise its
               right to elect to pursue  Regulatory  Approval as provided above,
               then ICN shall  commence  pursuing  Regulatory  Approval  in such
               country  or  countries  within  90 days  after  the  date of its
               notice to Schering; if ICN does not do so, then the Parties shall
               have such rights as if ICN did not  provide an initial  notice to
               Schering pursuant to this Section 3.4(a).
    
   
          (b)  If Schering at any time decides not to pursue Regulatory Approval
               in any country or countries in the Territory, then Schering shall
               notify ICN  within 30 days  of such decision. In such event, ICN
               at any time  may  notify  Schering  that ICN  intends  to  pursue
               Regulatory   Approval  in  such  country  or   countries   within
               90  days  after the  date of such notice by ICN to Schering.  If
               ICN  does  not  commence  pursuing  Regulatory  Approval  in such
               country  or  countries  within  90 days  after  the  date of its
               notice to Schering, then the Parties shall have such rights as if
               ICN did not  provide an initial  notice to  Schering  pursuant to
               this Section 3.4(b).
    
<PAGE> 
18

          3.5 Governmental Inspections.  During the Exclusive Period, each Party
shall  advise and  provide a  reasonable  description  to the other Party of any
governmental  visits to, or written or oral inquiries  about,  any facilities or
procedures for the manufacture, storage or handling of Product, promptly (but in
no event later than five (5)  calendar  days) after such visit or inquiry.  Each
Party shall furnish to the other Party,  (a) within two (2) days after  receipt,
any report or correspondence issued by the governmental  authority in connection
with such  visit or  inquiry,  including  but not  limited  to, any FDA Form 483
Establishment  Inspection  Reports,  warning  letters,  and  (b) at the  same it
provides  to a  governmental  authority,  copies  of any  and all  responses  or
explanations  relating to items set forth in Section 3.5(a), in each case purged
only of trade  secrets of the  receiving  Party that are  unrelated to the other
Party's activities under this Agreement and any information that is unrelated to
the Product.

<PAGE>
19

          3.6 Notice of Adverse Reactions.  During the Exclusive Period,  either
Party shall promptly report to the other Party any information regarding adverse
events  related to the use of the Product in  accordance  with the Adverse Event
Reporting Procedures (as may be amended from time to time upon mutual agreement)
set forth as Exhibit E and incorporated herein by reference.

          3.7 Recalls and Market Withdrawals.

          (a) If at any time during the Exclusive Period (i) any governmental or
regulatory authority in the Territory issues a request, directive, or order that
the Product be recalled or withdrawn,  or (ii) a court of competent jurisdiction
orders such a recall or  withdrawal  in the  Territory,  or (iii)  either  Party
determines  in its sole  discretion  that the  Product  should  be  recalled  or
withdrawn,  the Parties shall take all appropriate corrective actions. The final
decision of a Party to recall pursuant to (iii) of this subsection  shall not be
subject to  arbitration  under Article 13 of this  Agreement (or any other legal
action, subject to Section 13(g)),  although the consequences to the other Party
of any improper decision shall be subject to arbitration.

          (b) If the negligent act or omission by one Party or the breach by one
Party  of an  applicable  product  warranty  (which,  in  the  case  of  Product
manufactured  by ICN shall be the warranty  contained in Section  8.4(a)) is the
proximate cause of a recall or withdrawal under any provision of Section 3.7(a),
that Party shall be solely  responsible  for such costs and expenses for its own
account.  If the negligent act or omission or breach of product  warranty by one
Party is not the proximate  cause of such a recall or withdrawal,  (i) the costs
and  expenses  of  notification  and  destruction  or return of the  recalled or
withdrawn  Product in connection  with a recall or withdrawal  resulting  from a
determination pursuant to Section 3.7(a)(iii), above shall be borne by the Party
making such  determination,  and (ii) the costs and expenses of notification and
destruction or return of the recalled or withdrawn  Product in connection with a
recall or  withdrawal  pursuant  to  Section  3.7(a)(i)  or (ii)  shall be borne
equally by the Parties.


<PAGE>
 20



          3.8 Additional Indications. In further recognition by the Parties that
ICN's  development  studies  with  respect to other  indications  of the Product
should not interfere with the development  activities conducted by Schering with
respect to the chronic  hepatitis  C  indication,  if ICN pursues an  additional
indication  for the Product in any country in the  Territory,  then  (subject to
compliance with Section 3.1(f) in the case of a hepatitis C indication):
   
               (i)  ICN may so notify  Schering  by  providing  Schering  with a
                    description of ICN's development activities,  all associated
                    preclinical  and clinical data,  ICN's  aggregate  costs and
                    expenses incurred in pursuing such development activities to
                    date,  and the  estimated  costs and expenses for  remaining
                    activities,  and such  other  information  as  Schering  may
                    reasonably request.  In such event,  Schering shall have the
                    right,  exercisable  by notice  to ICN given not later  than
                    75  days  after  receipt of the notice from ICN, to elect to
                    have such  indication  become included in and subject to the
                    terms and  conditions of this Agreement  (including  without
                    limitation,  those relating to territory and royalties), and
                    all definitions  shall be appropriately  adjusted to include
                    such additional indication, effective upon receipt by ICN of
                    Regulatory  Approval with respect to such  indication in any
                    country in the Territory.  If Schering exercises such right,
                    then (A) Schering  shall assume and be  responsible  for any
                    and all further development  activities with respect to such
                    indication  in accordance  with the terms and  conditions of
                    this  Agreement,  and  (B)  promptly  after  receiving  such
                    Regulatory  Approval,  ICN shall  notify  Schering  of ICN's
                    aggregate costs and expenses incurred in pursuing Regulatory
                    Approval for such  indication,  and Schering shall reimburse
                    ICN  for  such  costs and  expenses  within  45 days  after
                    receipt  of an  invoice  from ICN.  Schering  shall have the
                    right to audit such costs and  expenses in  accordance  with
                    the provisions of Section 6.10(b).
    
               (ii) If ICN  does not  provide  such  notice  to  Schering  or if
                    Schering declines to exercise such rights, then ICN shall be
                    free to pursue such indication without further obligation to
                    Schering, except as expressly provided under this Agreement;
                    provided,  however,  that (i) ICN shall not sell the Product
                    for any such  indication  in any  country  in the  Territory
                    until five years after the date of the first commercial sale
                    in such  country by  Schering of the Product for the chronic
                    hepatitis C  indication,  and (ii) ICN shall not  sublicense
                    any third party to develop,  make,  have made,  use, sell or
                    distribute the Product for such indication in such countries
                    and shall only sell the Product in such  countries  directly
                    or through  its direct or  indirect  subsidiaries,  and only
                    under the brand name for the Product which ICN is then using
                    for the hepatitis C indication.

<PAGE>
 21

          3.9 Improvements.

               (a)  Any  Improvements  relating  to the  Product  made after the
                    Effective  Date  relating  to  the  indication  for  chronic
                    hepatitis C developed  during the Exclusive  Period by or on
                    behalf  of a Party  shall be deemed  to be  included  in the
                    Product for all purposes  under this  Agreement.  Without in
                    any way  limiting the  foregoing,  each Party shall have the
                    fully paid-up,  non-exclusive  license to commercialize  any
                    such  Improvements  made by the other Party during and after
                    the Exclusive  Period,  in those  countries of the Territory
                    where each Party has rights under this Agreement, subject to
                    the other terms and conditions of this Agreement;  provided,
                    however,   if  the  non-exclusive   licensee  breaches  this
                    Agreement,  becomes  insolvent  or  undergoes  a  change  in
                    control (as defined in Section  12.7) or Schering  exercises
                    its  right  under  Section  12.2(a),  no  such  licenses  to
                    Improvements shall be granted.

               (b)  Any   Improvements   (other  than  those   relating  to  the
                    indication  for chronic  hepatitis C)  developed  during the
                    Exclusive  Period by or on behalf of a Party  shall be owned
                    by the Party or Parties whose employee(s),  contractee(s) or
                    designee(s)  would be deemed to be the  inventor  under U.S.
                    patent  laws;  provided,   however,  that  (i)  if  Schering
                    develops such an  Improvement  then ICN shall have the right
                    to commercialize  any such Improvement on such  commercially
                    reasonable  terms  as  to  which  the  Parties  shall  agree
                    following good faith negotiations,  and (ii) if ICN develops
                    such an  Improvement  (other than an  additional  indication
                    covered by Section 3.8) then  Schering  shall have the right
                    to commercialize  any such Improvement for use in connection
                    with the treatment of hepatitis  (other than hepatitis A and
                    hepatitis  B) on such  commercially  reasonable  terms as to
                    which  the  Parties   shall  agree   following   good  faith
                    negotiations.

               (c)  For the avoidance of doubt, ICN  acknowledges  that Schering
                    or its  Affiliates  are not  granting  any  type of right or
                    license to ICN under any  alpha-interferon  patent rights or
                    know-how  owned,  controlled or licensed to Schering and its
                    Affiliates.

<PAGE>
 22

                                    ARTICLE 4

                       CERTAIN OBLIGATIONS OF THE PARTIES
                             DURING EXCLUSIVE PERIOD

          4.1 Diligence in Marketing the Product.
   
          Schering agrees to make a commercial launch of Product in each country
within the Territory within six (6) months of obtaining  Regulatory  Approval in
each country (including, where applicable, pricing and third party reimbursement
approval).  Schering  shall use its  reasonable  efforts to diligently  promote,
market and sell the Product in each country within the Territory  throughout the
Exclusive Period.  Such efforts shall be commensurate with those efforts used to
promote its own products of similar potential,  value and status in such country
or a comparable  country in the  Territory,  as the case may be, or, if Schering
has no such similar  products in a  comparable  country,  commensurate  with the
efforts that other  reputable  pharmaceutical  companies of comparable  size and
product  portfolio  would use with  respect to a product  of similar  potential,
value and  status in such  country.  Both  Parties  recognize  that  extenuating
circumstances may arise that warrant a delay in launching the Product, including
but not limited to, unfavorable pricing, pricing reimbursement or Labelling. The
Parties agree that such  circumstances  shall be  considered in connection  with
excusing  Schering  from its  obligation  to launch within the specified six (6)
month period.  Notwithstanding  the foregoing,  however,  Schering shall not be
required to use reasonable efforts to diligently launch,  market or sell Product
or pursue  pricing  and  reimbursement  approvals  under this  Agreement  in any
country within the Territory where a Regulatory  Approval has been obtained that
is less than the Minimum  Labelling  for the Product.  The Parties agree that if
ICN makes a  commercial  launch of the Product in any country of the EU prior to
Schering  making such a launch in such  country,  and Schering has not made such
launch because of unfavorable pricing, pricing reimbursement or Labelling,  then
Schering  shall be  relieved of its  obligation  to pay  minimum  royalties  (as
described in Section 6.2) in all of the countries of the EU.
    

<PAGE>
 23

          4.2  Compliance  with  Laws.  During  the  Exclusive  Period,  each of
Schering  and ICN shall  comply with all material  laws,  rules and  regulations
applicable to its respective activities under this Agreement.

          4.3 Trademark Registrations and Infringements.

               (a)  Notwithstanding  the  grant  of  rights  to  Schering  under
                    Section  2.1,  ICN  acknowledges  that  Schering  intends to
                    develop and use Schering  Trademarks  for the Product in the
                    Territory,  and that  Schering  shall not be required to use
                    the ICN Trademark in connection  with the rights  granted to
                    Schering  under this  Agreement and shall be free to use the
                    Schering  Trademark,  the  use of the  ICN  Trademark  being
                    solely at the  election of Schering.  Schering  acknowledges
                    that ICN  intends to use ICN  Trademarks  for the Product in
                    the EU, as provided in this Agreement.

               (b)  Should  Schering  elect  to use  the  ICN  Trademark  in any
                    country  in the  Territory,  Schering  shall  notify  ICN in
                    writing,  and, if the ICN  Trademark is filed or  registered
                    there, ICN shall prosecute, maintain and defend in its or an
                    Affiliate's  name, and at its own cost and expense,  the ICN
                    Trademark in such country  relating to the marketing or sale
                    of the  Product.  If the  ICN  Trademark  is  not  filed  or
                    registered  in  such  country,  then  ICN  shall  so  notify
                    Schering and, upon Schering's  written request,  which shall
                    not be  unreasonably  refused,  ICN shall file and prosecute
                    the ICN  Trademark  in such  country,  with  the  reasonable
                    out-of-pocket  costs of ICN for such filing and  prosecution
                    to be reimbursed to ICN by Schering.  In addition,  Schering
                    shall  provide  reasonable  cooperation  to  ICN so as to be
                    entered as a Registered User or recorded licensee of the ICN
                    Trademark  in any country of the  Territory,  including  the
                    execution  of any  documents  pursuant  to ICN's  reasonable
                    request.  Upon termination of this Agreement for any reason,
                    Schering shall also provide  reasonable  cooperation to ICN,
                    so as to be removed as Registered User or recorded  licensee
                    of  the  ICN  Trademark  in  the  Territory,  including  the
                    execution  of any  documents  pursuant  to ICN's  reasonable
                    request,  and this obligation  shall survive  termination of
                    this Agreement.

<PAGE>
 24

               (c)  Schering and ICN each acknowledge the rights of the other in
                    their respective  trademarks,  trade names,  trade dress and
                    logos used in connection  with the Product,  and, except and
                    to the extent expressly provided in this Agreement,  nothing
                    in this  Agreement  shall be  deemed  to give  either  Party
                    during or after the  duration of this  Agreement  any right,
                    title or  interest in the  trademarks,  trade  names,  trade
                    dress or logos of the other Party.

               (d)  Neither  Schering nor ICN shall use nor seek to register any
                    trademarks  which are  confusingly  similar to each  others'
                    respective  trademarks,  trade  names,  trade dress or logos
                    used in  connection  with the  Product,  without  the  other
                    Party's prior written consent.

               (e)  ICN  agrees  that,  except  for the  rights  retained  by it
                    pursuant to this Agreement  (including  without  limitation,
                    the rights to  manufacture  the Product  and to  distribute,
                    market  and  sell  the  Product  in the  EU  under  the  ICN
                    Trademark),  ICN shall  neither use  itself,  nor grant to a
                    third party or to an Affiliate,  the right to the use of the
                    ICN Trademark in the Territory  during the Exclusive  Period
                    for the Product in any country where Schering has elected to
                    use the ICN Trademark as permitted by this Agreement without
                    the consent of  Schering,  which  shall not be  unreasonably
                    withheld.
   
               (f)  Should  Schering  elect to use the ICN  Trademark,  Schering
                    shall submit to ICN, in writing, intended formats for use on
                    the ICN packaging  and on  promotional  and sales  materials
                    prior to the first use thereof by  Schering.  Should ICN not
                    provide a reasonable  basis for  disapproval of the intended
                    formats  within  thirty (30) days of receipt,  Schering  may
                    then use the ICN Trademark in the formats submitted on those
                    and on  subsequently  developed  packaging  and  promotional
                    materials.  Schering  agrees  that  it will  not  thereafter
                    implement  any changes to such  formats  unless the same has
                    been  submitted to ICN in accordance  with the procedure set
                    forth in the preceding sentence.
    
<PAGE>
 25
   
               (g)  In any country of the Territory where Schering elects to use
                    the ICN Trademark, Schering shall notify ICN promptly and in
                    writing upon  learning that the ICN Trademark is actually or
                    potentially  infringed by a third party, or if an allegation
                    is made the ICN Trademark may infringe the rights of a third
                    party.  ICN  shall be  responsible  for  taking  appropriate
                    action to stop the  infringement  or to defend  the right to
                    the  continued use of its  trademark.  Should ICN decline to
                    take  action  within  thirty  (30) days of receipt of notice
                    from Schering in a country of the Territory  where  Schering
                    has elected to use the ICN  Trademark,  then Schering is not
                    obligated to but may, at its option,  take reasonable action
                    to stop  the  infringement  or to  defend  the  right to the
                    continued use of the ICN  Trademark.  The Party bringing the
                    action shall be deemed the "Litigating  Party" and the other
                    Party,  the  "Non-Litigating  Party"  for  purposes  of this
                    Section 4.3.
    
               (h)  In any action brought pursuant to Section 4.3(g),  the costs
                    of the  action  shall be  borne  and any  recovery  shall be
                    retained by the Litigating Party; provided,  however that if
                    the Litigating  Party recovers  damages  attributable to (i)
                    the profits of a third party infringer; or (ii) lost profits
                    or lost sales of the Non-Litigating party; or (iii) punitive
                    damages  against  the third  party  infringer;  then any net
                    recovery  to the  Litigating  Party  (i.e.  total  amount of
                    recovery,  less court costs and attorneys'  fees),  shall be
                    divided equally between ICN and Schering. If Schering is the
                    Litigating  Party in an action  to  defend  the right to the
                    continued  use of the ICN  Trademark  and is  successful  in
                    obtaining  a  final   judgment  of  a  court  of   competent
                    jurisdiction defending the right to the continued use of the
                    ICN Trademark, then ICN shall reimburse Schering for half of
                    its  reasonable  out-of-pocket  net costs in  obtaining  the
                    judgment (i. e. court costs and reasonable  attorneys'  fees
                    less any recoveries received).

               (i)  In any action  brought  pursuant to this  Section  4.3,  the
                    Non-Litigating Party shall provide reasonable assistance and
                    information to the Litigating  Party and shall be reimbursed
                    for its reasonable out-of-pocket costs and expenses.

               (j)  Should for any reason the ICN  Trademark,  in any country of
                    the Territory  where  Schering has elected to use it, or the
                    Schering  Trademark,  in any  country of the  Territory,  be
                    prevented from being used, then the Parties shall consult as
                    to a suitable other trademark for use in connection with the
                    Product for  purposes of this  Agreement  and in  accordance
                    with its terms and conditions.

               (k)  At the  termination  or expiration of the rights  granted by
                    this Agreement or the Exclusive Period in any country of the
                    Territory  for any reason,  Schering  shall cease all use of
                    the ICN  Trademark,  except for any sell-off of Inventory of
                    Product by Schering following termination of this Agreement.

<PAGE>
 26

                                    ARTICLE 5

                              MARKETING ACTIVITIES

          5.1 Establishment of Scientific and Commercial Liaison Committees.

               (a)  Promptly  following  the  Effective  Date,  Schering and ICN
                    shall  establish  a  Scientific   Liaison  Committee  and  a
                    Commercial  Liaison Committee (the  "Committees") that shall
                    be advisory committees only. Schering shall promptly provide
                    to  the  Committees   material   data,   reports  and  other
                    information  concerning  scientific and  commercial  matters
                    relating  to  the  Product.  Schering  shall  be  the  final
                    decision-maker  as to the scope of the activities within the
                    purview of the Committees.

               (b)  The activities set forth in Exhibit D,  incorporated  herein
                    by reference,  among others,  related to the Product  within
                    the Territory  during the  Exclusive  Period shall be within
                    the purview of the advisory  Scientific  Liaison  Committee.
                    Notwithstanding  the  foregoing,  such  activities,  to  the
                    extent  they  relate  to the EU,  shall  not be  within  the
                    purview of such committee  following  Regulatory Approval in
                    the EU.

               (c)  The  following  activities,  among  others,  related  to the
                    Product  within the Territory  during the  Exclusive  Period
                    shall be  within  the  purview  of the  advisory  Commercial
                    Liaison Committee:

                    (i)  worldwide Product branding for promotional materials,
                    (ii) consideration  of positioning  statements and detailing
                         message for the Product for the Territory;
                   (iii) planning market research and exchanging market research
                         data;
                    (iv) review of advertising and promotional materials;
                    (v)  coordination of international symposia and congresses;
                    (vi) publication planning; and
                    (vii) opinion leader development.
<PAGE>
 27
                    Notwithstanding  the  foregoing,  such  activities,  to  the
                    extent  they  relate  to the EU,  shall  not be  within  the
                    purview of such committee following  Regulatory Approval  in
                    EU.

               (d)  Schering shall be entitled to designate in writing to ICN up
                    to three (3)  members  of each  Committee,  and ICN shall be
                    entitled to designate in writing to Schering up to three (3)
                    members.  A Party may change its  designated  members at any
                    time,  upon written  notice to the other  Party.  Each Party
                    also  shall be  entitled  to bring a  reasonable  number  of
                    non-member attendees to each meeting of the Committees.  The
                    chairs of the  Committees  shall be  designated  by Schering
                    during the Exclusive Period.

               (e)  The  Committees  shall meet from time to time,  as  mutually
                    agreed to by the members,  but not fewer than two times each
                    calendar  year  during  the  Exclusive  Period,  unless  the
                    members determine that fewer meetings are required.

               (f)  The chairs of the Committees shall designate the location of
                    the  meetings of the  Committees,  but unless ICN  otherwise
                    agrees,  at least half of the  meetings  shall take place in
                    California.   All  travel,   lodging  and  similar  expenses
                    incurred by a member in attending meetings of the Committees
                    shall be borne by the corresponding Party.

               (g)  During the Exclusive Period,  the members  designated by ICN
                    and Schering shall be entitled to provide input and comments
                    with  respect to the  activities  of the  Committees.  It is
                    understood  that the  Committees  are to serve as forums for
                    information  and input by ICN as to the activities  outlined
                    in  subsections  (b)  and  (c)  above,  but  it  is  further
                    understood  that  Schering  is not  required  to empower the
                    Committees to make final decisions as to such matters.

<PAGE>
28

          5.2 Product Labelling. 

          (a)  During the Exclusive  Period,  the Labelling  shall,  if Schering
               elects to use the ICN  Trademark,  contain the ICN  Trademark and
               shall  otherwise be consistent in format (but not substance) with
               the Labelling for Schering's other  pharmaceutical  products sold
               in the corresponding  country within the Territory at the time in
               question. Unless prohibited by applicable law, if Schering elects
               to use the ICN Trademark,  the Labelling  shall indicate that the
               Product is under license from ICN.


          (b)  To the extent Schering elects to use the ICN Trademark,  Schering
               shall not  change the  Labelling  in format  (but not  substance)
               during  the   Exclusive   Period   without   the  prior   written
               authorization of ICN (which shall not be unreasonably  withheld),
               except that ICN's consent is not required if Schering, at its own
               cost and expense, desires to change the colors and other elements
               of trade dress to conform to the trade dress of Schering's  other
               pharmaceutical  products,  provided  that  such  change  does not
               affect  the  other  applicable  Labelling  requirements  of  this
               Section 5.2.

          5.3 Product Sampling.

          (a)  Schering  may  provide  sampling  for the  Product for use in the
               treatment  of  chronic  hepatitis  C  in  a  country  within  the
               Territory,  in reasonable  quantities  comparable to the sampling
               conducted for its other  anti-viral  and/or oncology  products in
               that country;  provided,  however,  that subsequent to commercial
               launch of the Product in any country, the amount of such sampling
               in such country shall be limited to  [REDACTED].  The free use of
               Product prior to  commercial  launch for the treatment of chronic
               hepatitis C in (i)  pre-marketing  programs  (where  permitted by
               applicable  law)  and  compassionate  programs,  and  (ii)  other
               marketing and Phase IV studies,  shall all be deemed  sampling of
               the Product.  All samples of the Product  shall be purchased at a
               price equal to [REDACTED].

          (b)  Subsequent  to  commercial  launch of the  Product  by ICN in any
               country,  the amount of sampling in such  country by ICN shall be
               limited to  [REDACTED].  If the amount of such sampling by ICN in
               any  such  country  exceeds  [REDACTED],  then ICN  shall  pay to
               Schering  an  amount  equal  to  the  [REDACTED],  determined  in
               accordance with the provisions of Section 6.2.

          (c)  The  distribution  of Product by Schering  during the  [REDACTED]
               preceding  the  date on  which  Schering  reasonably  expects  to
               receive Regulatory Approval shall be consistent with the Research
               and  Development  Plan set forth as Exhibit D and with Schering's
               previous  historical  compassionate use programs for ribavirin in
               connection  with the  treatment of chronic  hepatitis C. Schering
               shall not  engage in  pre-approval  distribution  of the  Product
               (other than for clinical  trials,  which are those with protocols
               and case  report  forms) in a manner  that  could  reasonably  be
               expected to compromise the  distribution by ICN of the Product in
               the EU following Regulatory Approval.

<PAGE>
 29

                                    ARTICLE 6

                   COMPENSATION PAYABLE TO ICN; PAYMENT TERMS

          6.1  License  Fee. On the  Effective  Date,  Schering  shall pay ICN a
license fee in the amount of $23.0  million,  by wire  transfer  of  immediately
available funds to an account designated by ICN.

<PAGE>
 30

          6.2 Royalty Payment.  In partial  consideration of the grant of rights
to Schering by ICN under this Agreement, Schering shall pay ICN a royalty in the
following amount:

          (a)  with  respect to sales of Product  in the EU,  [REDACTED]  of Net
               Sales,  [REDACTED],  but in no event less than  [REDACTED] of Net
               Sales; and

          (b)  with respect to sales of Product in the Territory,  other than in
               the EU:

                             [REDACTED];
                             [REDACTED]; and
                             [REDACTED];

provided, however, that in no event shall the royalty on sales of the Product in
any country in the  Territory  (including  the EU) be less than  [REDACTED]  per
capsule  sold based on a  [REDACTED],  [REDACTED]  per  capsule  sold based on a
[REDACTED],  and  [REDACTED]  sold  based on a  [REDACTED],  such  amounts to be
proportionately  adjusted based on a scale of [REDACTED] for other capsule sizes
less than  [REDACTED] and based on a scale of [REDACTED] for other capsule sizes
in excess of [REDACTED];  provided further,  however,  that if in any country in
the  Territory  ICN is also  marketing  the  Product,  and if at any time  ICN's
current  actual net  selling  price for the Product is less than  [REDACTED]  of
Schering's  current  actual net selling price for the Product (based on the same
capsule  size  and  comparable  terms  and  conditions,  and  other  than due to
increases in price by Schering), then such minimum royalty shall no longer apply
to sales of the Product by Schering in such country  (and such  minimum  royalty
shall not be  reinstated).  In the event any third party is also  marketing oral
ribavirin in any country in the Territory,  then Schering shall not be obligated
to pay the minimum  royalty  provided for in this Section 6.2 for that  country.
[REDACTED]  For purposes of this  Section  6.2,  the current  actual net selling
price shall be  determined  on a  country-by-country  basis,  for each  calendar
quarter,  by dividing the Net Sales of capsules of a particular capsule strength
by the total number of capsules of the same  strength that were sold and sampled
in such country during such period. Each Party shall have the right to audit the
books and records of the other Party for the  purpose of  verifying  the current
actual net selling price, in accordance with the procedures set forth in Section
6.10.

<PAGE>
 31

          6.3 Royalty  Reduction.  The royalty  payable by Schering  pursuant to
this Agreement shall be reduced by [REDACTED] until the cumulative  royalty that
would otherwise be payable but for such reduction equals [REDACTED] million.

          6.4 Product Price to Schering.

          (a)  The price to be charged to Schering for supplies of finished bulk
               Product furnished  pursuant to Article 8, FOB ICN's plant,  shall
               be the greater of (i)  [REDACTED]  of Net Sales,  calculated on a
               country-by-country  basis,  or  (ii)  ICN's  Cost of  Goods  plus
               [REDACTED].  Schering  shall have the right to verify  ICN's cost
               price of Product  pursuant to the procedures set forth in Section
               6.10 hereof.
   
          (b)  Schering  shall  establish  an  estimated  sales  price  per unit
               ("Estimated  Selling  Price") for the Product in each  country of
               the  Territory.  Schering  agrees  to apply  the same  policy  in
               establishing  the  Estimated  Selling  Price for the  Product  as
               Schering  would do in the  case of its own  products  of  similar
               status.  Schering shall pay for all Product  purchased under this
               Agreement  within  30 days  after receipt of an invoice from ICN,
               which shall be rendered  upon  shipment,  based on the  Estimated
               Selling  Price,  subject  to  adjustment  for the final  price as
               provided in Section 6.4(e).
    
   
          (c)  Schering may change its  Estimated  Selling  Price on a quarterly
               basis by  notifying ICN at least fifteen (15) days prior  to  the
               beginning  of  any  calendar quarter and such  Estimated  Selling
               Price shall then apply for the calculation of the price at  which
               Schering  shall  purchase  Product  from ICN  and all  orders  of
               Product delivered  to Schering in  that quarter shall be effected
               at  said purchase  price,  subject  to  adjustment for  the final
               price as provided in Section 6.4(e).
    
          (d)  The price to be invoiced  to  Schering  at time of  shipment  for
               supplies of finished bulk Product shall be equal to [REDACTED] of
               the Estimated Selling Price of the Product in the Territory, plus
               relevant customs duties,  shipping,  bulk packaging and insurance
               costs,  which  shall be the  responsibility  of and shall be duly
               paid by Schering.
   
          (e)  Reconciliations of the price paid to ICN for Product based on the
               Estimated Selling Prices as against actual Net Sales (in order to
               arrive at the [REDACTED] calculation of Net Sales), shall be made
               by Schering on a quarterly basis within ninety (90) days of  the
               end of each calendar quarter.
    

<PAGE>
 32
   
          6.5  Royalty  Payment Dates.  Within  60 days  after  the end of each
March,  June,  September and December in each and every calendar year during the
Exclusive Period,  following the commencement of marketing of Product,  Schering
shall furnish and deliver to ICN a full and true accounting of its worldwide Net
Sales of Product  hereunder  during the three (3) month  period  ending with the
previous  March 31st,  June 30th,  September  30th and  December  31st and shall
simultaneously  pay to ICN,  for  the  account  of  Schering  or the  applicable
Affiliate or  sublicensee,  as the case may be, a sum equal to the  aggregate of
the royalty due thereon as calculated pursuant to Section 6.2 hereof (reconciled
for any previous  overpayments or  underpayments),  to such account as ICN shall
have designated from time to time in writing to Schering.
    
          6.6 Direct  Affiliate  Licenses,  Supporting  Licenses and  Compulsory
Royalties.

          (a)  Whenever  Schering shall  reasonably  demonstrate to ICN that, in
               order to facilitate  direct royalty payments by an Affiliate,  it
               is desirable  that a separate  license  agreement be entered into
               between  ICN and such  Affiliate,  ICN will grant  such  licenses
               directly to such  Affiliate by means of an agreement  which shall
               be consistent  with all of the provisions  hereof,  provided that
               Schering  guarantees the  Affiliate's  obligations  thereunder or
               otherwise provides to ICN assurances of performance  satisfactory
               to ICN in its sole discretion.

          (b)  If Schering,  its Affiliates or sublicensees  are legally obliged
               by any governmental  authority in any country in the Territory to
               grant  licenses  under the  Know-How  to any third party to make,
               use,  or sell  Product at royalty  rates less than those  payable
               pursuant   to  this   Agreement,   then   the   royalty   payable
               prospectively hereunder with respect to Net Sales in such country
               shall be  reduced  to such  lesser  rate as long as such  reduced
               royalty remains effective.

<PAGE>
 33
   
          6.7 Place of Royalty Payment and Currency Conversions.  All royalties,
with the exception of those payable on sales to customers in the United  States,
shall be paid by  Schering  from its office in Lucerne,  Switzerland.  Royalties
payable on U.S. sales shall be paid directly to ICN by Schering Corporation from
its offices in  Kenilworth,  New Jersey.  All royalty  payments shall be made in
United  States  dollars  to the extent  that free  conversion  to United  States
dollars is  permitted.  Royalties  payable on sales in countries  other than the
United States shall be calculated by multiplying  the  appropriate  royalty rate
times the  sales in each  currency  in which  they are made and  converting  the
resulting  amount into United  States  dollars at the rates of exchange  used by
Schering  for  reporting  such  sales  for  United  States  financial  statement
purposes.  If, due to  restrictions  or  prohibitions  imposed by a national  or
international authority, payments cannot be made as aforesaid, the Parties shall
consult with a view to finding a prompt and  acceptable  solution,  and Schering
will,  from time to time, deal with such monies as ICN may lawfully direct at no
additional out-of-pocket expense to Schering.  Notwithstanding the foregoing, if
royalties  cannot be remitted to ICN for any reason  within six (6) months after
the end of the  calendar  quarter  during which they are earned,  then  Schering
shall be obligated to deposit the royalties in a bank account in  Switzerland in
the name of ICN.  Royalties  payable  by  Schering  shall be net of any  foreign
withholding  taxes due, it being understood that such withholding  taxes are the
obligation  of ICN.  Schering  shall  forward to ICN in a timely  manner all tax
receipts relating to such withholding taxes.
    

<PAGE>
 34

          6.8  Royalties  on  Resales.  No earned  royalty  shall be  payable in
respect of sales between and among Schering, its Affiliates and sublicensees, it
being  understood  that  royalties  are to be  paid  on  resale  of  Product  to
independent third parties.

          6.9  Duration of Royalty  Payments.  With  respect to Net Sales of any
Product in any country in the Territory,  royalties shall be paid hereunder with
respect to Net Sales of such  Product  until  [REDACTED]  from the date of first
commercial sale after Regulatory  Approval of such Product in such country,  but
no longer than the duration of the Exclusive Period.

          6.10 Maintenance of Royalty Records; Audit Rights.
   
          (a)  Schering  shall  maintain  and cause its  Affiliates  to maintain
               books  of  account  and  adequate  records  of all Net  Sales  of
               Product, including those made by sublicensees. ICN shall have the
               right,  following  written  request  by  ICN,  by  its  regularly
               employed independent certified public accounting firm of national
               standing,  and at its own expense,  during normal business hours,
               to  examine  pertinent  books  and  records  of  Schering  at all
               reasonable  times (but no later than  forty-five  (45) days after
               written  request  is made  and not  more  often  than  once  each
               calendar  year) for the purpose of verifying and reporting to ICN
               as to the computation of the royalty payments made hereunder;  it
               being  understood that the right to conduct such  examination and
               the actual  examination with respect to any quarterly  accounting
               period  hereunder  shall  take place not later than two (2) years
               years  following the expiration of said period.  Said  accounting
               firm  shall  only  report as to the  computation  of the  royalty
               payments  made to ICN and  shall  not  disclose  to ICN any other
               information.  The accounting firm  representatives  shall execute
               customary confidential agreements prior to any examination.
    

<PAGE>
 35

          (b)  ICN shall  maintain at a location in the United  States  accurate
               books  and  records  in  accordance   with   generally   accepted
               accounting principles,  in sufficient detail to enable ICN's Cost
               of Goods  hereunder  to be verified.  All such  records  shall be
               maintained  for  three (3) years  after  the  submission  of each
               report  required  to  be  provided  under  this  Agreement.   The
               independent  certified  public  accountant of Schering shall have
               access, subject to a customary confidentiality agreement,  during
               normal  business hours and following  reasonable  prior notice to
               ICN, to the books and records of ICN to conduct a review or audit
               thereof to verify the  calculation  of ICN's Cost of Goods.  Such
               access shall be available  not more than once each  calendar year
               and for eighteen (18) months after the  expiration or termination
               of this Agreement,  but in no event shall Schering be entitled to
               review or audit ICN's Cost of Goods  calculation  occurring  more
               than  three  years  before  the  requested  date of the review or
               audit.

          (c)  If Schering manufactures Product pursuant to this Agreement, then
               Schering shall maintain  accurate books and records in accordance
               with  generally  accepted  accounting  principles,  in sufficient
               detail  to  enable  Schering's  Cost  of  Goods  hereunder  to be
               verified.  All such  records  shall be  maintained  for three (3)
               years after the submission of each report required to be provided
               under this Agreement. The independent certified public accountant
               of ICN shall have access, subject to a customary  confidentiality
               agreement,  during normal business hours and following reasonable
               prior notice to Schering, to the books and records of Schering to
               conduct a review or audit  thereof to verify the  calculation  of
               Schering's Cost of Goods. Such access shall be available not more
               than once each  calendar  year and for eighteen (18) months after
               the expiration or termination of this Agreement,  but in no event
               shall ICN be entitled to review or audit Schering's Cost of Goods
               calculation  occurring more than three years before the requested
               date of the review or audit.

          (d)  Nothing in this  Section 6.10 shall limit the rights of any Party
               to obtain any and all relevant information for purposes of an ADR
               (as defined in Article 13) or otherwise pursuant to legal process
               in the event of a dispute under this Agreement.

<PAGE>
 36

          6.11  Equity  Purchase.   ICN  and  Schering-Plough   Corporation  are
contemporaneously   with  this  Agreement   entering  into  the  Stock  Purchase
Agreement.

          6.12  Withholding  Taxes,  etc.  If at any time  during  or after  the
Agreement, any jurisdiction within the Territory requires that taxes be withheld
from any payment (or portion thereof) of ICN's  compensation  under this Article
6,  Schering  may deduct  such  amount from the  corresponding  payment,  or, if
applicable,  ICN  will  promptly  reimburse  Schering  or its  designee(s)  such
amounts.  Schering shall provide ICN with  documentation of such withholding and
payment in a manner  that is  satisfactory  for  purposes  of the U.S.  Internal
Revenue  Service.  Any  withholdings  paid when due  hereunder  shall be for the
account of ICN and shall not be included in the  calculation  of Net Sales.  ICN
shall be liable for any deficiency,  and any fine, assessment or penalty imposed
by any taxing authority in the Territory for any deficiency in the amount of any
such withholding or the failure to make such withholding payment; if Schering is
required to pay any such deficiency,  or any fine, assessment or penalty for any
such deficiency,  ICN shall promptly reimburse Schering for such payments, which
shall not be  included  in the  calculation  of Net Sales.  Notwithstanding  the
foregoing, in no event shall ICN be liable for any deficiency,  fine, assessment
or penalty  resulting from  Schering's  failure to withhold the proper amount in
accordance with the written  instructions of ICN to Schering given in accordance
with Section 15.7 hereof.

                                    ARTICLE 7

                      ICN'S MARKETING RIGHTS; DISTRIBUTION

          7.1 ICN's  Marketing  Rights.  Notwithstanding  the rights  granted to
Schering  under this  Agreement,  ICN shall have the right at any time following
ICN's receipt of Regulatory  Approval in the EU to distribute,  market,  use and
sell the Product for the treatment of chronic hepatitis C, at ICN's expense,  in
the EU; provided,  however, that ICN shall not sell the Product to any entity in
the EU that could  reasonably be expected to resell the Product  outside the EU,
except for resales to non-EU countries that are members of the European Economic
Area. In addition,  in recognition of ICN's current sales of the Product for the
treatment of chronic hepatitis C pursuant to a Regulatory Approval in Egypt, ICN
shall  have  the  right  under  its  existing  contractual   obligations  (on  a
semi-exclusive  basis with Schering) at any time to distribute,  market, use and
sell the Product for the treatment of chronic hepatitis C, at ICN's expense,  in
Egypt;  provided,  however, that ICN shall not sell the Product to any entity in
Egypt that could reasonably be expected to resell the Product outside Egypt.

<PAGE>
 37

          7.2 Distribution.  In furtherance of the rights granted to Schering to
distribute  Product  throughout  the Territory as and to the extent  provided in
this Agreement:

          (a)  Promptly after the Effective  Date, ICN shall deliver to Schering
               a report of sales of Product by ICN in the Territory  during each
               of the four most recently ended fiscal quarters of ICN.

          (b)  ICN shall provide to Schering a sales report on a quarterly basis
               showing all sales and all units  shipped of Product by ICN in the
               Territory during the preceding quarter.

          (c)  As promptly as practicable  following sales of the Product to new
               customers by ICN, ICN shall  provide to Schering a report of such
               new customers for the Product.

          (d)  If,  at any time,  Schering  determines,  based on the  quarterly
               reports provided pursuant to Section 7.2(b),  that there has been
               a significant  change in  purchasing  patterns by any customer or
               customers  of ICN,  then  Schering  may require ICN to provide to
               Schering,  in advance of  acceptance by ICN, all orders from such
               customer  or  customers,  and  Schering  shall  have the right to
               require  ICN to  reject  any such  orders  as to  which  Schering
               reasonably  concludes that the Product covered by such orders are
               likely to be resold for use for  chronic  hepatitis C outside the
               country  from which the order was  placed.  For  purposes of this
               Section  7.2(d),  a "significant  change in purchasing  patterns"
               means  [REDACTED].  Schering shall not be entitled to require ICN
               to  reject  any  order as to which  ICN  reasonably  believes  is
               justifiable  in  light  of new  indications,  changed  labelling,
               outbreaks of disease or similar circumstances.

          (e)  ICN shall notify its existing  distributors and customers that it
               intends to restrict orders for off-label and similar purposes.

          (f)  If Schering  has required ICN to provide it with all orders prior
               to  acceptance  as  provided  above,  then ICN  shall  cause  its
               independent auditors to certify to Schering after the end of each
               calendar  quarter,  that ICN has  provided to  Schering  all such
               orders for such quarter.

          (g)  ICN's  obligations  under this Section 7.2 shall  terminate as to
               each country in the EU upon ICN's receipt of Regulatory  Approval
               in each such country of the EU.

<PAGE>
 38

          7.3 Ireland Sales. In furtherance of the rights granted to Schering to
distribute  Product  throughout  the Territory as and to the extent  provided in
this Agreement,  ICN grants to Schering the right to, and Schering shall, at its
option,  assume,  perform or discontinue,  and ICN shall cease, until receipt by
Schering of  Regulatory  Approval  of the  Product in the EU, the  distribution,
marketing  and  sale of the  Product  currently  being  conducted  by ICN or any
Affiliate of ICN in Ireland  (including without  limitation,  any obligations of
ICN under distribution and other marketing agreements and arrangements  relating
to Ireland).  Schering  shall pay to ICN,  during each year during the Exclusive
Period  (other  than any year  during  the  Exclusive  Period  during  which ICN
actually sells the Product in Ireland,  with the  permission of Schering)  until
receipt by Schering of  Regulatory  Approval of the Product in the EU, an amount
determined  by  [REDACTED]  for sale of Product in Ireland in 1994,  [REDACTED],
times  [REDACTED],  payable annually on January 10 of each year.  Schering shall
have the right to audit the books and  records  of ICN once,  within  [REDACTED]
after the Effective  Date,  solely to verify such  [REDACTED],  and otherwise in
accordance with the provisions of Section 6.10(b).

<PAGE>
 39

                                    ARTICLE 8

                SUPPLY OF PRODUCT BY ICN DURING EXCLUSIVE PERIOD

          8.1 Supply.

          (a)  Subject to the provisions of Section 8.3, Schering shall purchase
               the  Product  from ICN,  and ICN shall  supply all of  Schering's
               requirements  of the  Product  (including,  but not  limited  to,
               research and development requirements,  including placebos, which
               shall be in accordance  with  reasonable  procedures for ordering
               and  production  as  agreed  by the  Parties)  in  finished  bulk
               capsules,  or bulk  substance as necessary,  subject to the terms
               and conditions of this Article 8. If at any time ICN  experiences
               a shortage of Product  supply and the available  supplies are not
               sufficient  to satisfy  all of  Schering's  requirements  for the
               Product  in the  Territory,  ICN  shall  allocate  its  available
               worldwide  supplies  (including  inventory in excess of customary
               supplies)  equitably among its own  requirements  and Schering's,
               based on the purchasing history of such entities during the prior
               six-month period.

          (b)  For so long as ICN is supplying  Product to  Schering,  ICN shall
               furnish Schering with all information related to the pre-approval
               inspections for the Product and shall promptly resolve,  at ICN's
               expense,  any  manufacturing  deficiencies  in order  to  receive
               timely  Regulatory  Approval.  ICN  shall  thereafter  be  solely
               responsible,  at ICN's expense,  for compliance with current Good
               Manufacturing  Practices  as  determined  by the FDA.  ICN  shall
               promptly  address and remedy any  deficiencies  noted in any Form
               483 reports or warning letters issued by the FDA.


<PAGE>
 39


          8.2 Forecasts and Procedures.

          (a)  Product  will be supplied  by ICN to  Schering  in finished  bulk
               capsules and only against receipt of Schering's  written purchase
               order and ICN's written  confirmation  of the same.  The delivery
               shall be within  [REDACTED]  from the receipt of Schering's  firm
               purchase  order  if the  quantity  ordered  does not  exceed  the
               current  forecast  provided in accordance  with Section 8.2(b) by
               more  than  [REDACTED],  and  within  [REDACTED]  if the  ordered
               quantity exceeds the current forecast by more than [REDACTED] but
               less than  [REDACTED].  The Parties  shall  discuss and  mutually
               agree on delivery  schedules if the quantity  ordered exceeds the
               current  forecast  by more  than  [REDACTED].  ICN  shall  within
               five  days  of receipt of any  Schering  written  purchase  order
               confirm  receipt  of such  purchase  order  (via  facsimile  to a
               facsimile number supplied by Schering for this purpose).

          (b)  To better enable ICN to plan its Product  production  program for
               the  Territory,  Schering  agrees to provide ICN monthly its then
               current  forecast for the quantities of the Product that Schering
               will require during the successive eighteen (18) months. Schering
               shall break down each  forecast  indicating  the  quantity  and a
               requested  delivery date by month for the first successive twelve
               (12) months followed by the next six (6) months  indicated in two
               (2)  quarterly  aggregates.  Each monthly  forecast  issued shall
               reflect a  continuously  rolling/progressive  eighteen (18) month
               cycle.  Each  current  monthly  forecast  shall be deemed to be a
               binding purchase order. Schering shall purchase from ICN at least
               [REDACTED]  of the sum of its  estimated  Product  orders for the
               second  calendar  quarter   indicated  in  the  latest  forecast;
               provided,  however,  that if, for the third and  fourth  calendar
               quarters  indicated in such monthly  forecast,  Schering does not
               purchase at least [REDACTED] of the sum of its estimated  Product
               orders,  Schering  shall pay to ICN,  at the time of payment  for
               Product  purchased  for such  quarters,  an amount equal to ICN's
               carrying cost (including  warehousing,  finance costs and similar
               items) of the amount of inventory  (including  bulk substance and
               finished capsules) reflected in such


<PAGE>
 40


               estimated  Product  orders  in excess  of the  amount of  Product
               purchased  for  such  quarters.   ICN  shall  not  be  under  any
               obligation  to accept any order of the Product which is in excess
               of  [REDACTED]  of the latest  forecast  relating  to  Schering's
               requirement for the first twelve (l2) months.

          (c)  Schering  shall  place  orders in  increments  of single  batches
               equivalent  to  [REDACTED];  provided,  however,  that solely for
               purposes  of  clinical  trials  the  minimum  batch size shall be
               [REDACTED].  ICN will use reasonable  efforts to provide capsules
               having the  longest  available  shelf life for  purposes  of such
               clinical trials.

          (d)  ICN may reject  Schering's  purchase  order if the purchase order
               fails  to  substantially  comply  with the  requirements  of this
               Article  8. In the event of any  discrepancy  between a  purchase
               order  for the  Product  and this  Agreement,  the  terms of this
               Agreement  shall govern.  ICN shall use  commercially  reasonable
               efforts to meet any Product requirements of Schering.

          (e)  All Product shall be packed for air freight  shipment and storage
               in accordance with Schering's  specifications  as mutually agreed
               upon and in accordance with applicable laws and regulations.

          (f)  Schering shall be responsible  for the costs,  including  customs
               duties,  freight and insurance,  that may be required to ship the
               Product from ICN's plant to any destination.


<PAGE>
 41


          (g)  Risk of loss and damage to the  Product  shall  pass to  Schering
               upon tender of the Product at ICN's plant.

          (h)  ICN  shall  prepare,   obtain,  and  transmit  to  Schering  such
               documents  as shall be required for Schering to take over customs
               clearance  and to  satisfy  other  import  formalities  into  the
               Territory.  Schering shall use diligent efforts to promptly clear
               shipments of Product  through  customs and shall handle and store
               the Product  thereafter in a manner which maintains the integrity
               of the Product.

          (i)  At the  reasonable  request of  Schering  at any time  during the
               Exclusive Period,  ICN shall promptly enter into a written supply
               agreement for supply of Product to a Schering  Affiliate (located
               within  the  Territory)  designated  by  Schering  on  terms  and
               conditions  consistent  with those contained in this Agreement as
               well as any additional terms as may be required by applicable law
               and any customary  additional  terms as shall be agreed to by the
               Parties (such consent not to be unreasonably  withheld). If there
               is any  inconsistency  between  this  Agreement  and such  supply
               agreement, the terms of this Agreement shall control.

          (j)  ICN shall provide to Schering,  at the commencement of Schering's
               purchases  of Product  from ICN,  and shall  update  from time to
               time,  the  test  methodologies  used  by  ICN in  preparing  the
               certificates  of  analysis  referred to in Section  8.4,  and any
               differences  between  the  then-current  specifications  for  the
               Product and the Product Specifications.

<PAGE> 
42

          8.3 Schering's Right to Manufacture.
   
          (a)  Within  24 months after the Effective Date, Schering shall notify
               ICN as to whether Schering elects to continue to purchase Product
               from ICN or to discontinue all or, if agreed to by ICN, a part of
               Schering's  purchase  of  Product  from ICN,  and to  manufacture
               Product  itself or have  Product  manufactured  for it by a third
               party.  If Schering  elects to continue to purchase  Product from
               ICN,  then the Parties  shall  negotiate  in good faith as to any
               capacity  requirements,  and  the  cost  of any  related  capital
               investment, required to meet Schering's requirements.  Subject to
               agreement of the Parties as to such  matters,  from the Effective
               Date, ICN shall only be required to supply Schering to the extent
               of ICN's current  available  capacity,  taking into account ICN's
               own  requirements  and commitments  with respect to Product.  ICN
               represents  that ICN has adequate  capacity to supply  Schering's
               requirements  of Product for  clinical  programs  for  Regulatory
               Approval.  If, after deciding to manufacture or have manufactured
               the Product,  Schering wishes to again purchase Product from ICN,
               Schering shall give ICN not less than 6 months' notice.  ICN may,
               but shall not be required to, supply Product to Schering, on such
               terms to which the Parties may agree.
    

          (b)  In the event that Schering  elects to manufacture  Product itself
               or have Product  manufactured  for it by a third  party,  then so
               long as this Agreement remains in effect,  Schering shall, at the
               request  of ICN,  supply  Product  to ICN at a price and on other
               terms and conditions  consistent with the terms and conditions on
               which ICN  supplies  Product to  Schering  under this  Agreement.
               Schering  shall only be  required  to supply ICN to the extent of
               Schering's available capacity, taking into account Schering's own
               requirements and commitments with respect to Product. For so long
               as Schering is supplying  Product to ICN,  Schering shall furnish
               ICN with all information related to the pre-approval  inspections
               for  the  Product  and  shall  promptly  resolve,  at  Schering's
               expense,  any  manufacturing  deficiencies  in order  to  receive
               timely Regulatory  Approval.  Schering shall thereafter be solely
               responsible,  at Schering's expense,  for compliance with current
               Good  Manufacturing  Practices as determined by the FDA. Schering
               shall promptly address and remedy any  deficiencies  noted in any
               Form 483 reports or warning letters issued by the FDA.

          (c)  If  Schering  elects to  purchase  Product  from  ICN,  ICN shall
               maintain its production  facilities (including those of any third
               party supplier) used to manufacture the Product,  so as to permit
               the  importation  and supply of Product in a timely  manner under
               this Agreement in all applicable  countries in the Territory.  So
               long as Schering is purchasing  Product from ICN, ICN will permit
               Schering  representatives to inspect the Product-related  portion
               of its production facilities,  at Schering's cost and expense, at
               any time during normal business hours and upon  reasonable  prior
               notice.  Any such inspection that involves third party facilities
               shall be subject to such limitations  (including  confidentiality
               obligations)  as may be imposed  under the  applicable  agreement
               between ICN and the third party.


<PAGE>
 43


          8.4 Limited Warranty.

          (a)  ICN  warrants  that each  shipment  of the  Product  supplied  to
               Schering  pursuant to this  Agreement,  when shipped from the ICN
               Facility,  shall conform to the Product Specifications,  shall be
               manufactured  by ICN and supplied to Schering in accordance  with
               the  requirements of applicable law in the country of manufacture
               and any other  applicable  regulatory  legal  requirements in the
               Territory,   including,  without  limitation,  any  current  Good
               Manufacturing   Practices   requirements,   and   shall   be   of
               substantially  equivalent  quality as the Product produced by ICN
               for its own use. ICN shall provide to Schering  concurrently with
               each shipment of Product a Certificate of Analysis which contains
               analytical  results and specifications of the batch. THE WARRANTY
               PROVIDED FOR IN THIS SECTION  8.4(a) IS EXCLUSIVE  AND IN LIEU OF
               ALL OTHER WARRANTIES, EXPRESS OR IMPLIED, INCLUDING WARRANTIES OF
               MERCHANTABILITY  AND FITNESS FOR A  PARTICULAR  PURPOSE,  WHETHER
               PERTAINING  TO THE PRODUCT AND  WHETHER  ARISING BY LAW,  CUSTOM,
               CONDUCT,  OR USAGE OR TRADE, AND THE RIGHTS AND REMEDIES PROVIDED
               IN SECTION  8.4(b) ARE  EXCLUSIVE AND IN LIEU OF ALL OTHER RIGHTS
               AND REMEDIES (EXCEPT AS PROVIDED IN SECTION 8.4(d)).

          (b)  Subject to Section 3.7(b) if any Product is shown to be in breach
               of ICN's warranty ("Non-Conforming Product") contained in Section
               8.4(a), Schering's exclusive remedy shall be to return to ICN the
               Non-Conforming  Product and to receive a credit  (with ICN paying
               related transportation costs) in the amount paid to ICN hereunder
               for such Non-Conforming  Product and related transportation costs
               (including costs of returning such Non-Conforming  Product) or to
               have ICN replace such Non-Conforming Product.

          (c)  EXCEPT FOR ICN'S  OBLIGATION TO REFUND OR REPLACE  NON-CONFORMING
               PRODUCT AS SET FORTH IN SECTION  8.4(b)  ABOVE,  ICN SHALL NOT BE
               LIABLE TO SCHERING  FOR, AND  SCHERING  WAIVES ANY AND ALL CLAIMS
               AGAINST  ICN  FOR,  ALL  DAMAGES,  INCLUDING  SPECIAL,  INDIRECT,
               CONSEQUENTIAL OR INCIDENTAL  DAMAGES,  WHICH MAY BE CAUSED BY, OR
               IN ANY WAY RESULT FROM,  THE PRODUCT OR THEIR DELIVERY UNDER THIS
               AGREEMENT,  INCLUDING  DAMAGES RESULTING FROM DELAYS IN DELIVERY,
               OR FAILURE TO  DELIVER,  ANY PRODUCT  WHETHER  BASED ON BREACH OF
               WARRANTY, STRICT LIABILITY OR ANY OTHER CAUSE OF ACTION.

          (d)  NOTHING  IN THIS  SECTION  SHALL  BE  DEEMED  IN ANY WAY TO LIMIT
               SCHERING'S  RIGHTS  OF   INDEMNIFICATION   PURSUANT  TO  SECTIONS
               11.2(a)(ii) AND 11.2(b)



<PAGE>
 44

          8.5 Rejection of Product.
   
          (a)  Schering  may reject any  shipment of Product  from ICN that does
               not meet ICN's  warranty set forth in Section 8.4, upon notice to
               ICN  delivered  within  forty  five (45) days  after  receipt  by
               Schering of such  shipment or, in the case of any latent  defect,
               after  Schering   discovered  or  had  a  reasonable   basis  for
               discovering  such  defect.  Any  shipment of Product  that is not
               rejected by Schering within such period shall be deemed accepted.
               In no event  shall ICN be  liable  for any  nonconformity  of the
               Product  resulting from the shipment,  storage or handling of the
               Product  after tender by ICN in  accordance  with Section  8.2(g)
               (unless  resulting from the fault of ICN, such as not shipping in
               accordance  with  agreed   specifications),   or  the  tampering,
               alteration or mishandling of the Product by any person (including
               any customer of Schering) following such tender.
    

          (b)  Upon the  request of ICN,  Schering  shall  furnish  evidence  of
               nonconformity  of the  shipment of Product.  If ICN  confirms the
               nonconformity,  ICN will use diligent  efforts to, at  Schering's
               request,  either  promptly  replace the Product at no  additional
               charge to Schering with a conforming  shipment (which may include
               rework of the Product if feasible), or issue a credit to Schering
               (pro rated,  if less than a full  shipment is  rejected)  for the
               Product  Price  and any  other  costs and  expenses  incurred  by
               Schering  in  shipping  the  rejected  Product  to  ICN.  If  ICN
               disagrees  with  Schering's  determination,   the  Parties  shall
               promptly submit the dispute to a mutually  acceptable  laboratory
               for a binding  determination (in lieu of the procedures described
               in Article 13) of the conformance or nonconformity of the Product
               and  ICN  shall  submit  as part  of its  documentation  retained
               manufacturing  samples.  The  non-prevailing  Party shall pay the
               costs and expenses of the laboratory tests.


<PAGE>
 45

                                    ARTICLE 9

                                 CONFIDENTIALITY

          9.1  Confidentiality.  ICN and Schering  shall use only in  accordance
with this  Agreement and shall not disclose to any third party any  confidential
or proprietary  information,  whether  patentable or not, related to the subject
matter of this Agreement furnished by the other Party pursuant to this Agreement
or  otherwise,  without  the  prior  written  consent  of the other  Party.  The
foregoing  obligations  shall  survive the  expiration  or  termination  of this
Agreement for a period of twenty (20) years.  These  obligations shall not apply
to:

          (a)  Information  that is known to the  receiving  Party  prior to the
               time of disclosure, to the extent evidenced by written records of
               the receiving Party;

          (b)  Information  disclosed  to the  receiving  Party by a third party
               which has a right to make such disclosure;

          (c)  Information  that is at the  time  of  disclosure  or  thereafter
               becomes  published or otherwise part of the public domain without
               breach of this Agreement by the receiving Party;

          (d)  Information which is independently  developed by employees of the
               receiving   Party  or  its   Affiliates   and  such   independent
               development can be properly  demonstrated by the receiving Party;
               or

          (e)  Information that is required to be disclosed by law,  regulation,
               rule, act or order of the FDA or similar authority or agency or a
               court of  competent  jurisdiction;  provided  that the  receiving
               Party gives the other Party  sufficient  advance notice to permit
               it to seek a protective order or other similar order with respect
               to such  information  and  thereafter  discloses only the minimum
               information  required to be disclosed in order to comply with the
               request, whether or not a protective order or other similar order
               is obtained by the other Party.


<PAGE>
46

          9.2 No  Publicity.  A Party may not use the name of the other Party in
any  publicity or  advertising  and,  except as provided in section 9.1, may not
issue a press release or otherwise publicize or disclose any information related
to this Agreement or the terms or conditions  hereof,  without the prior written
consent of the other Party.  The Parties  shall agree on a form of initial press
release that may be used by either Party to describe this Agreement. Nothing in
the foregoing,  however,  shall prohibit a Party from making such disclosures to
the extent deemed necessary under applicable federal or state securities laws or
any rule or regulation of any nationally recognized securities exchange; in such
event,  however,  the  disclosing  Party shall use good faith efforts to consult
with the other Party  prior to such  disclosure  and,  where  applicable,  shall
request confidential treatment to the extent available.

                                   ARTICLE 10

                         REPRESENTATIONS AND WARRANTIES

          10.1  Representations  and  Warranties of Each Party.  Each of ICN and
Schering hereby represents,  warrants and covenants to the other Party hereto as
follows:

          (a)  It is a corporation duly organized and validly existing under the
               laws of the  state  or other  jurisdiction  of  incorporation  or
               formation;

          (b)  The execution, delivery and performance of this Agreement by such
               Party has been duly authorized by all requisite corporate action,
               subject  only  to  receipt  of  requisite  boards  of  directors'
               approvals;

          (c)  It has the  power and  authority  to  execute  and  deliver  this
               Agreement and to perform its obligations hereunder;

<PAGE>
 47

          (d)  The  execution,  delivery and  performance  by such Party of this
               Agreement and its compliance with the terms and provisions hereof
               does not and will not conflict  with or result in a breach of any
               of the terms and  provisions of or constitute a default under (i)
               a  loan  agreement,   guaranty,  financing  agreement,  agreement
               affecting a product or other  agreement or instrument  binding or
               affecting it or its property;  (ii) the provisions of its charter
               documents  or bylaws;  or (iii) any order,  writ,  injunction  or
               decree of any court or governmental  authority entered against it
               or by which any of its property is bound;

          (e)  Except for the governmental and regulatory  approvals required to
               market the Product in the Territory, the execution,  delivery and
               performance  of this Agreement by such Party does not require the
               consent,  approval or authorization  of, or notice,  declaration,
               filing or  registration  with,  any  governmental  or  regulatory
               authority  and the  execution,  delivery or  performance  of this
               Agreement will not violate any law, rule or regulation applicable
               to such Party;

          (f)  This Agreement has been duly  authorized,  executed and delivered
               and constitutes such Party's legal,  valid and binding obligation
               enforceable  against it in accordance with its terms subject,  as
               to enforcement,  to bankruptcy,  insolvency,  reorganization  and
               other  laws of general  applicability  relating  to or  affecting
               creditors' rights and to the availability of particular  remedies
               under general equity principles; and

          (g)  It shall comply with all applicable material laws and regulations
               relating to its activities under this Agreement.

          10.2  ICN'S  Representations.  ICN  hereby  represents,  warrants  and
covenants to Schering as follows:

          (a)  ICN owns or has sufficient  rights in and to the Know-How and ICN
               Trademark, free and clear of any liens or encumbrances,  to grant
               the rights to Schering as contained in this Agreement;

          (b)  ICN is not aware of any  existing  third party  trademark,  trade
               name or other intellectual  property rights in the Territory that
               might be infringed by the import, distribution, marketing, use or
               sale of the Product in the  Territory  under the ICN Trademark or
               through the use of the ICN name;

          (c)  During the Exclusive Period, ICN will use diligent efforts not to
               diminish the right under its Know-How and ICN  Trademark  granted
               to  Schering  hereunder,  including  without  limitation  by  not
               committing or permitting any acts or omissions  which would cause
               the breach of any  agreements  between  itself and third  parties
               which provide for intellectual  property rights applicable to the
               development,  manufacture,  use or sale of Product. ICN agrees to
               provide Schering promptly with notice of any such alleged breach.
               ICN is in  compliance  in all  material  respects  with  any such
               agreements with third parties;


<PAGE>
 48


          (d)  Data summaries provided to Schering by ICN prior to the Effective
               Date relating to the clinical  trials of the Product,  taken as a
               whole, accurately represent the underlying raw data;

          (e)  ICN has  provided  to  Schering a summary of all  adverse  events
               known to ICN relating to the Product;

          (f)  ICN has  disclosed  to  Schering  all  information  known  to ICN
               concerning  (i)  patents  owned by third  parties  that  might be
               infringed  by  Schering's  use of the  Product  to treat  chronic
               hepatitis C; or (ii) patent  applications  owned,  or  reasonably
               believed by ICN to be owned,  by third parties that, if issued as
               a patent,  might be infringed by Schering's use of the Product to
               treat chronic hepatitis C;

          (g)  ICN  has  no  knowledge  of  any  circumstances  that  (i)  would
               adversely affect the commercial utility of the use of the Product
               to treat chronic  hepatitis C; or (ii) that would render Schering
               liable to a third party for patent  infringement as a consequence
               of Schering's  use of the Product to treat  chronic  hepatitis C;
               and

          (h)  (i) ICN has disclosed to Schering all distributorship agreements,
               marketing  arrangements  or  similar  agreements  whereby  ICN is
               selling,   distributing  or  supplying  the  Product   (including
               directly  or  through  Affiliates  of  ICN)  or  whereby  ICN has
               authorized third parties to make, sell,  distribute or supply the
               Product  (collectively  "License  Agreements");  (ii) Exhibit 2.1
               sets forth a list of all License  Agreements;  (iii) no contract,
               agreement or understanding,  either oral or in writing, modifies,
               amends or supplements the License Agreements;  and (iv) ICN shall
               not enter into any License Agreements between the date hereof and
               the Effective Date.

          (i)  Except as set  forth in  Exhibit  2.1,  ICN has not  granted  any
               rights  under the  Know-How  to any third  party to either  make,
               sell, distribute or supply the Product.


<PAGE>
 49


          (j)  As soon as practicable following the Effective Date, ICN shall at
               its sole cost and expense  (A)  terminate  (and not renew,  where
               applicable), or allow to expire, the License Agreements listed on
               Exhibit 2.1(A);  (B) terminate (by agreement with the other Party
               thereto,  or otherwise) the License  Agreements listed on Exhibit
               2.1(B);  and (C) use  reasonable  efforts  to amend  the  License
               Agreements  listed on Exhibit  2.1(C) to prohibit the other party
               from  making,   selling,   distributing  or  supplying  any  oral
               formulation  of the Product in the  Territory  in  derogation  of
               Schering's  rights  under this  Agreement.  Except as  previously
               disclosed to Schering or as  contemplated by Article 7, Article 8
               or this Section 10.2(j),  during the Exclusive Period,  ICN shall
               not  distribute,  market,  sell or supply the Product  (including
               directly  or  through  Affiliates  of ICN) in any  country in the
               Territory.

          (k)  Neither ICN nor any officer of ICN or  Affiliate  of such officer
               is currently engaged in any research or development  programs for
               any other  products  for the  treatment of hepatitis C (including
               directly or through Affiliates of ICN).


<PAGE> 
50

          10.3 Continuing Representations. The representations and warranties of
each Party  contained in Sections  10.1 and 10.2 shall  survive the execution of
this  Agreement and shall remain true and correct after the date hereof with the
same effect as if made as of the date hereof.

          10.4 No Inconsistent Agreements. Neither Party has in effect and after
the Effective Date neither Party shall enter into any oral or written  agreement
or  arrangement  that  would be  inconsistent  with its  obligations  under this
Agreement.

                                   ARTICLE 11

                   INDEMNIFICATION AND LIMITATION ON LIABILITY

          11.1 Indemnification by Schering.

          (a)  Schering  shall  indemnify,  defend and hold harmless ICN and its
               Affiliates,  and  each of its  and  their  respective  employees,
               officers,  directors and agents (each, a "ICN Indemnified Party")
               from and against any and all liability,  loss, damage,  cost, and
               expense (including  reasonable  attorneys' fees),  subject to the
               limitations in section 11.5  (collectively,  a "Liability") which
               the ICN Indemnified Party may incur, suffer or be required to pay
               resulting  from or arising in  connection  with (i) the breach by
               Schering of any covenant, representation or warranty contained in
               this  Agreement,  (ii) any  negligent  act or omission or willful
               misconduct  of  Schering  (or  any  Affiliate   thereof)  in  the
               promotion,  marketing  and  sale  of the  Product  or  any  other
               activity  conducted by Schering under this Agreement which is the
               proximate  cause of injury,  death or property  damage to a third
               party, or (iii) the successful  enforcement by an ICN Indemnified
               Party of any of the foregoing.

          (b)  Schering also shall indemnify,  defend and hold harmless each ICN
               Indemnified  Party from and against any  Liability  which the ICN
               Indemnified  Party  may  incur,  suffer  or be  required  to  pay
               resulting from or arising in connection with any negligent act or
               omission  or willful  misconduct  of Schering  (or any  Affiliate
               thereof)  in  the  manufacture,  promotion  or  marketing  of the
               Product or any other  activity  conducted by Schering  under this
               Agreement after the Exclusive Period which is the proximate cause
               of injury, death or property damage to a third party.

<PAGE>
 51

          11.2 Indemnification by ICN.

          (a)  ICN shall  indemnify,  defend and hold harmless  Schering and its
               Affiliates,  and  each of its  and  their  respective  employees,
               officers,  directors and agents (each,  an "Schering  Indemnified
               Party")  from  and  against  any  Liability  which  the  Schering
               Indemnified  Party  may  incur,  suffer  or be  required  to  pay
               resulting  from or arising in  connection  with (i) the breach by
               ICN of any covenant, representation or warranty contained in this
               Agreement,   (ii)  any  negligent  act  or  omission  or  willful
               misconduct  of ICN (or any  Affiliate  thereof) in providing  the
               Know-How or in the manufacture,  promotion,  marketing or sale of
               the  Product or any other  activity  conducted  by ICN under this
               Agreement  which  is the  proximate  cause  of  injury,  death or
               property  damage  to a  third  party,  or  (iii)  the  successful
               enforcement  by an  Schering  Indemnified  Party  of  any  of the
               foregoing.

          (b)  ICN also shall indemnify,  defend and hold harmless each Schering
               Indemnified  Party  from and  against  any  Liability  which  the
               Schering  Indemnified  Party may incur,  suffer or be required to
               pay resulting  from or arising in  connection  with any negligent
               act or omission or willful  misconduct  of ICN (or any  Affiliate
               thereof)  in  the  manufacture,  promotion  or  marketing  of the
               Product  or  any  other  activity  conducted  by ICN  under  this
               Agreement after the Exclusive Period which is the proximate cause
               of injury, death or property damage to a third party.

          11.3   Conditions  to   Indemnification.   The   obligations   of  the
indemnifying  Party  under  paragraphs  11.l and 11.2 are  conditioned  upon the
delivery of written notice to the indemnifying Party of any potential  Liability
promptly after the indemnified Party becomes aware of such potential  Liability.
The indemnifying Party shall have the right to assume the defense of any suit or
claim related to the Liability if it has assumed  responsibility for the suit or
claim in writing;  however,  if in the  reasonable  judgment of the  indemnified
Party,  such  suit or claim  involves  an issue or  matter  which  could  have a
materially  adverse  effect  on  the  business   operations  or  assets  of  the
indemnified Party, the indemnified Party may waive its rights to indemnity under
this  Agreement and control the defense or settlement  thereof,  but in no event
shall any such waiver be  construed  as a waiver of any  indemnification  rights
such Party may have at law or in equity.  If the indemnifying  party defends the
suit or claim,  the  indemnified  Party may participate in (but not control) the
defense thereof at its sole cost and expense.


<PAGE>
 52

          11.4  Settlements.  Neither Party may settle a claim or action related
to a Liability  without the consent of the other Party, if such settlement would
impose any monetary  obligation on the other Party or require the other Party to
submit to an injunction or otherwise  limit the other Party's  rights under this
Agreement.  Any payment made by a Party to settle any such claim or action shall
be at its own cost and expense.

          11.5  Limitation of Liability.  With respect to any claim by one Party
against the other arising out of the  performance  or failure of  performance of
the other  Party under this  Agreement,  the  Parties  expressly  agree that the
liability  of such  Party to the other  Party for such  breach  shall be limited
under this Agreement or otherwise at law or equity to direct damages only and in
no event  shall a Party be liable  for,  punitive,  exemplary  or  consequential
damages.

          11.6 Insurance.  Each Party  acknowledges  that they each maintain and
shall, during the term of this Agreement,  maintain a self-insurance program for
liability  insurance,  including  products  liability and contractual  liability
insurance,  adequately  covering such Party's  obligations under this Agreement.
Each Party shall  provide the other Party with  evidence of such  self-insurance
program, upon request.

                                   ARTICLE 12

                              TERM AND TERMINATION

          12.1 Term of Agreement.  The term of this Agreement shall begin on the
Effective Date and shall  continue in perpetuity  unless  terminated  earlier in
accordance  with this Article 12. Upon the  expiration of the Exclusive  Period,
(a)  Schering   shall  be  granted  a  worldwide,   perpetual,   fully-paid  up,
non-exclusive  license in and to the  Know-How  to enable  Schering  to develop,
make,  have made,  use, sell and distribute  Product in the  Territory,  and (b)
Schering  shall grant ICN reference to any  Regulatory  Approvals and pricing or
reimbursement approvals relating to the Product in the Territory.



<PAGE>
 53



          12.2  Termination  by Either Party.  This  Agreement may be terminated
upon written notice to the other Party in the event of any of the following:

          (a)  unilaterally by Schering at any time, with or without cause, upon
               [REDACTED] written notice;

          (b)  by either Party upon  nonpayment  of any properly due and payable
               amount that is continuing for twenty (20) business days after the
               defaulting   Party  has   received   written   notice   from  the
               non-defaulting Party of such nonpayment;
   
          (c)  by either  Party upon  material  breach by the other Party of any
               provision  herein that is continuing  forty-five  (45) days after
               the non-breaching  Party gives the breaching Party notice of such
               breach  specifying in reasonable  detail the  particulars  of the
               alleged breach; or
    
          (d)  by either Party in the event the other Party  becomes  insolvent,
               or voluntary or  involuntary  proceedings  are  instituted  by or
               against the other Party and are not dismissed  within 60 days, or
               a receiver or custodian is appointed  for such Party's  business,
               or a substantial  portion of such Party's  business is subject to
               attachment  or similar  process,  or the other Party is unable to
               satisfy  its  obligations  as they  become  due,  enters into any
               composition  or  arrangement  with its  creditors  or enters into
               liquidation.

          12.3  Continuing  Obligations.  Neither  ICN  nor  Schering  shall  be
relieved of their respective obligations to pay any sums of money due or payable
or accrued under this  Agreement as of the effective  date of such  termination.
All  accounts  between ICN and Schering  shall be settled in full within  ninety
(90) days following the expiration or termination of this Agreement. Articles 9,
10 and 13 and Sections 3.1(d), 3.9, 4.3(b),  4.3(k),  6.10, Article 11, 12.7(a),
15.9,  this Section 12.3 and any other provision which by its terms is stated to
survive this  Agreement,  shall  survive the  termination  or expiration of this
Agreement.  In addition,  any other provision  required to interpret and enforce
the Parties' rights and  obligations  under this Agreement also shall survive to
the extent  required for the full  observation and performance of this Agreement
by the Parties hereto.


<PAGE>
 54
   
          12.4 Partial Termination of Territory by ICN. Subject to the terms and
conditions  of Section  3.4 hereof,  ICN may  terminate  Schering's  rights with
respect to a particular country within the Territory,  effective upon sixty (60)
days' written  notice to Schering if Schering has failed to make any  commercial
sale of the Product in such country within six (6) months  following  Regulatory
Approval with the Minimum Labelling with respect to the Product in such country.
Upon such  termination,  Schering  shall grant ICN  reference to all  applicable
Regulatory  Approvals  and  pricing or  reimbursement  approvals  related to the
Product in order to enable ICN to market,  sell or promote  the  Product in such
country,  or appoint any agent,  distributor  or other entity to do so,  without
liability to Schering.
    
          12.5 Effects of Termination by Schering.

          (a)  In the event of  termination  of this Agreement by Schering under
               Section 12.2 (a), and if  termination  occurs prior to Regulatory
               Approval of the Product in any country of the Territory  then the
               following shall occur: (i) Schering shall be granted a worldwide,
               perpetual, non-exclusive license in and to the Know-How to enable
               Schering  to  make,  have  made,  use  and  sell  Product  in the
               Territory;  (ii) Schering shall provide to ICN all reports, data,
               samples  (if  necessary),  and,  if  specifically  required  by a
               regulatory authority,  other information,  necessary to allow ICN
               to file  for  Regulatory  Approval  in any  such  country  either
               concurrently  with  Schering or, if Schering is not then pursuing
               Regulatory  Approval in such  country,  within a reasonable  time
               period;  (iii) Schering shall pay to ICN the royalties (including
               minimum  royalties)  provided  for under and in  accordance  with
               Section 6.2 hereof  with  respect to any and all sales of Product
               by  Schering   in  the   Territory;   and  (iv)   Schering-Plough
               Corporation  shall have no  obligation  to make the  purchases of
               common stock of ICN as set forth in the Stock Purchase  Agreement
               which are triggered by  Regulatory  Approval in the United States
               and the EU if the relevant  Regulatory  Approval has not occurred
               as of the termination by Schering.


<PAGE>
 55

          (b)  In the event of  termination  of this Agreement by Schering under
               Section  12.2(a)  and  if  termination  occurs  after  Regulatory
               Approval of the Product in any country of the Territory  then the
               following shall occur: (i) Schering shall be granted a worldwide,
               perpetual, non-exclusive license and in to the Know-How to enable
               Schering  to  make,  have  made,  use  and  sell  Product  in the
               Territory;  (ii)  Schering  shall  grant  ICN  reference  to  any
               Regulatory  Approvals  and  pricing  or  reimbursement  approvals
               relating to the Product  outside of the EU; (iii)  Schering shall
               provide to ICN all reports, data, samples (if necessary), and, if
               specifically   required   by  a   regulatory   authority,   other
               information,  necessary  to  allow  ICN to  file  for  Regulatory
               Approval in the  Territory;  (iv)  Schering  shall pay to ICN the
               royalties  (including  minimum  royalties)  provided  for  and in
               accordance  with the terms of Section 6.2 hereof with  respect to
               any and all sales of Product by  Schering in the  Territory;  and
               (v) Schering-Plough  Corporation shall have no obligation to make
               the  purchases  of common  stock of ICN as set forth in the Stock
               Purchase Agreement which are triggered by Regulatory  Approval in
               the United States and the EU if the relevant  Regulatory Approval
               has not occurred as of the termination by Schering.

          (c)  In the event of  termination  of this Agreement by Schering under
               Section   12.2(a),   unless  Schering  fully  complies  with  the
               provisions of Sections 12.5(a) and 12.5(b) above,  Schering shall
               not  manufacture,  use or sell the Product in the Territory for a
               period  of  three  years  from the  date of  termination  of this
               Agreement.

          (d)  In the event of  termination  of this Agreement by Schering under
               Sections  12.2(b),  (c) or (d), without limiting any other rights
               or remedies  Schering may have,  the following  shall occur:  (i)
               Schering  shall retain a  worldwide,  perpetual,  fully-paid  up,
               exclusive license (exclusive even as to ICN, including in the EU)
               in and to the Know-How to enable Schering to develop,  make, have
               made,  use, sell and distribute  Product in the  Territory;  (ii)
               Schering  shall be obligated to pay to ICN any  royalties  (other
               than any minimum royalties) provided for under Section 6.2 hereof
               with  respect to any and all sales of Product by  Schering in the
               Territory; provided, however, that such royalties shall be offset
               and/or  reduced to reflect  damage  suffered  by  Schering in the
               event of a breach of this  Agreement  giving  rise to  Schering's
               right to  terminate,  to the extent  determined by the neutral in
               accordance   with  the   provisions  of  Article  13;  and  (iii)
               Schering-Plough  Corporation shall have no obligation to make the
               purchases  of  common  stock  of ICN as set  forth  in the  Stock
               Purchase Agreement which are triggered by Regulatory  Approval in
               the United States and the EU if the relevant  Regulatory Approval
               has not occurred as of the termination by Schering.


<PAGE>
 56

          12.6 Effects of Termination by ICN.

          (a)  In the  event  of  termination  of this  Agreement  by ICN  under
               Sections  12.2(b)  or  (d)  then  all of the  rights  granted  to
               Schering  under this  Agreement  shall  terminate.  Except as set
               forth  immediately  below in  Section  12.6(b),  in the  event of
               termination of this Agreement by ICN pursuant to 12.2(c),  all of
               the  rights  granted  to  Schering  under  this  Agreement  shall
               terminate.

          (b)  In the event of a material  breach by Schering of its obligations
               under Section 3.1(a) (research and development  obligations),  or
               Section 4.1 (diligence in marketing the Product),  which material
               breach  is  continuing  after  the cure  period  provided  for in
               Section  12.2(c),  then the rights granted to Schering under this
               Agreement shall terminate on a country-by-country  basis relative
               to the  country  of the  Territory  in  which  Schering's  breach
               occurred.

          12.7 Change of Control.

          (a)  Schering  agrees  not to effect or in any way  participate  in or
               facilitate a change of control of ICN for a period of  [REDACTED]
               following the date of this Agreement,  unless  requested by ICN's
               board of directors.

          (b)  For  purposes of this Section  12.7, a "change of control"  means
               (i) a merger,  consolidation  or  combination in which a Party to
               this  Agreement  is  not  the  surviving  corporation,  (ii)  any
               "person"  (within the meaning of Section  13(d) and Section 14(d)
               (2) of the  Securities  Exchange  Act of 1934) is or becomes  the
               beneficial  owner,  directly or indirectly,  of securities of the
               Party  representing  [REDACTED]  or more of the  combined  voting
               power of the Party's then-outstanding securities; or (iii) during
               any  period  of two  consecutive  years,  individuals  who at the
               beginning of such period  constitute the Board of Directors cease
               for any reason to constitute at least a majority thereof,  unless
               the election of each new director by the Party's stockholders was
               approved by a vote of at least  two-thirds of the directors  then
               still  in  office  who were  directors  at the  beginning  of the
               period.

<PAGE>
57

          12.8  Remedy Not  Exclusive.  The  exercise by a Party of any right of
termination  under  this  Agreement  shall be in  addition  to,  and  shall  not
constitute  a waiver of, any other  right or remedy the Party may have at law or
in equity.


                                  ARTICLE 13

                               DISPUTE RESOLUTION
   
          (a)  The  Parties  recognize  that a bona fide  dispute  as to certain
               matters may from time to time arise during the  Exclusive  Period
               which  relate  to  either  Party's   rights  and/or   obligations
               hereunder.  In the  event of the  occurrence  of such a  dispute,
               either Party may, by written notice to the other Party, have such
               dispute referred to their respective officers designated below or
               their  successors,   for  attempted   resolution  by  good  faith
               negotiations  within  thirty  (30)  days  after  such  notice  is
               received. Said designated officers are as follows:
    
               For ICN                 [REDACTED]- President
               For Schering            [REDACTED] - President
   
In the  event the  designated  officers  are not able to  resolve  such  dispute
through good faith negotiations within such (30) thirty-day period, either Party
may invoke the provisions of paragraph (b) below any time within such thirty day
period.
    
          (b)  Except  for  Schering's   unilateral   right  to  terminate  this
               Agreement pursuant to Section 12.2(a), which shall not be subject
               to the dispute  resolution  process set forth in this Article 13,
               any dispute,  controversy  or claim arising out of or relating to
               the validity, construction, enforceability or performance of this
               Agreement  including  disputes  relating to an alleged  breach or
               termination  of  this  Agreement  shall  be  settled  by  binding
               Alternative  Dispute  Resolution  ("ADR") in the manner described
               below; provided,  however, that in resolving any such dispute the
               neutral  referred to below shall give effect to the provisions of
               this Agreement and shall not adjust, modify or change the effects
               of termination as set forth in Sections 12.5 and 12.6:
<PAGE>
 58
               (i)  If a Party  intends  to begin an ADR to  resolve a  dispute,
                    such Party shall provide  written notice (the "ADR Request")
                    by  certified  or  registered  mail or  properly  documented
                    overnight  delivery to the other Party  informing such other
                    Party of such  intention and the issues to be resolved.  The
                    notice shall  explain the nature of the  complaint and refer
                    to the  relevant  sections of the  Agreement  upon which the
                    complaint  is based.  The  complaining  Party shall also set
                    forth  a  proposed  solution  to the  problem,  including  a
                    suggested time frame within which the Parties must act.
   
               (ii) The  non-complaining  Party must  respond in writing  within
                    forty-five (45) of receiving the notice with an explanation,
                    including  references  to  the  relevant  provisions  of the
                    Agreement  and a  response  to  the  proposed  solution  and
                    suggested time frame for action. The  non-complaining  Party
                    may add additional issues to be resolved.
    
   
               (iii)Within fifteen (15) days of receipt of the response from the
                    non-complaining  Party,  the Parties  shall meet and discuss
                    options for resolving  the dispute.  The  complaining  Party
                    must  initiate the  scheduling of this  resolution  meeting.
                    Each Party shall make available all appropriate personnel to
                    meet and confer with the other Party within the fifteen (15)
                    days period following the complaining Party's receipt of the
                    response by the non-complaining Party.
    

<PAGE>
 59
   
               (iv) Any and all  disputes  that cannot be  resolved  pursuant to
                    Section 13(b)(iii) shall be submitted to a neutral who shall
                    be selected by the  then-President  of the Center for Public
                    Resources  ("CPR"),  680 Fifth  Avenue,  New York,  New York
                    10019.  The neutral shall be an individual who shall preside
                    over and  resolve any  disputes  between  the  Parties.  The
                    neutral  selected  shall  be a  former  judge  of a state or
                    federal court  selected  from the Judicial  Panel of the CPR
                    and shall not be an employee, director or shareholder of, or
                    otherwise  have any current or previous  relationship  with,
                    either Party or of an  Affiliate of any Party.  Either Party
                    shall have ten (10)  business days from the date the neutral
                    is selected to object in good faith to the selection of that
                    person. If either Party makes such an objection, the Parties
                    shall instruct the  then-President  of the CPR to select, as
                    soon as possible thereafter and in any event within ten (10)
                    days,  another  neutral under the same  conditions set forth
                    above.  This second  selection shall be final. The ADR shall
                    be conducted in accordance with the rules of the CPR then in
                    effect,  subject to the time periods and other provisions of
                    this Article 13.
    
   
               (v)  Consistent  with the time schedule  established  pursuant to
                    Section  13(b)(vi),  the  neutral  shall  hold a hearing  to
                    resolve  each of the issues  identified  by the  Parties and
                    shall  render  the  award  as  expeditiously  thereafter  as
                    possible  but in no event more than  thirty  (30) days after
                    the close of hearings. In making the award the neutral shall
                    rule on each  disputed  issue and shall adopt in whole or in
                    part  the  proposed  ruling  of one of the  Parties  on each
                    disputed issue.
    
   
               (vi) During the meeting  referred to in Section  13(b)(iii),  the
                    Parties shall negotiate in good faith the scope and schedule
                    of discovery,  relating to depositions,  document production
                    and other discovery devices,  taking into account the nature
                    of the dispute submitted for resolution.  If the Parties are
                    unable to reach  agreement  as to the scope and  schedule of
                    discovery,  the neutral may order such discovery as he deems
                    necessary. To the extent practicable taking into account the
                    nature  of  the  dispute  submitted  for  resolution,   such
                    discovery shall be completed  within sixty (60)days from the
                    date of  selection of the  neutral.  At the  hearing,  which
                    shall commence  within twenty (20) days after  completion of
                    discovery unless the neutral otherwise  orders,  the Parties
                    may   present   testimony   (either   by  live   witness  or
                    deposition),  subject to cross-examination,  and documentary
                    evidence.  To the extent practicable taking into account the
                    nature  of the  dispute  submitted  for  resolution  and the
                    availability of the neutral,  the hearing shall be conducted
                    over thirty (30) consecutive  business days, with each Party
                    entitled to  approximately  half of the allotted time unless
                    otherwise ordered by the neutral.  The hearing shall be held
                    in the United States at such place as 
    

<PAGE>
 60
   
                    agreed upon by the Parties or if they are unable to agree at
                    a place designated by the neutral. Each Party shall have the
                    right to be represented  by counsel.  The neutral shall have
                    sole  discretion  with  regard to the  admissibility  of any
                    evidence  and all other  matters  relating to the conduct of
                    the hearing.  The neutral shall,  in rendering his decision,
                    apply the substantive law of New Jersey. The decision of the
                    neutral shall be final and not  appealable,  except in cases
                    of fraud or bad  faith  on the  part of the  neutral  or any
                    Party to the ADR  proceeding in connection  with the conduct
                    of such proceedings.
    
   
               (vii)At least  twenty (20)  bussiness  days prior to the date set
                    for the hearing, each Party shall submit to each other Party
                    and the neutral a list of all  documents on which such Party
                    intends to rely in any oral or written  presentation  to the
                    neutral  and a list of all  witnesses,  if any,  such  Party
                    intends to call at such hearing and a brief  summary of each
                    witness' testimony. At least five (5) business days prior to
                    the hearing, each Party must submit to the neutral and serve
                    on  each  other  Party  a  proposed  findings  of  fact  and
                    conclusions  of law on each issue to be resolved.  Following
                    the close of  hearings,  the Parties  shall each submit such
                    post-hearing  briefs to the neutral  addressing the evidence
                    and issues to be resolved as may be required or permitted by
                    the neutral.
    
          (c)  The neutral shall  determine the  proportion in which the Parties
               shall pay the costs and fees of the ADR. Each Party shall pay its
               own costs  (including,  without  limitation,  attorneys fees) and
               expenses in connection with such ADR; provided,  however, that if
               the  neutral   determines  that  the  action  of  any  Party  was
               arbitrary,  frivolous or in bad faith, the neutral may award such
               costs  (including,   without  limitation,   attorneys  fees)  and
               expenses to the prevailing Party.
<PAGE> 
61


          (d)  The ADR proceeding shall be confidential  and, except as required
               by law,  neither  Party  shall make (or  instruct  the neutral to
               make) any public  announcement with respect to the proceedings or
               decision of the neutral  without the prior written consent of the
               other Party.  The existence of any dispute  submitted to ADR, and
               the  award of the  neutral,  shall be kept in  confidence  by the
               Parties and the neutral,  except as required in  connection  with
               the  enforcement  of  such  award  or as  otherwise  required  by
               applicable law.

          (e)  For the  purposes of this  Article  13, the  Parties  acknowledge
               their  diversity  and agree to  accept  the  jurisdiction  of the
               Federal District Court in Newark,  New Jersey for the purposes of
               enforcing  awards  entered  pursuant  to  this  Article  and  for
               enforcing the agreements reflected in this Article.

          (f)  Nothing  contained  herein  shall  be  construed  to  permit  the
               arbitrator(s)  or any court or any other forum to award punitive,
               exemplary or any similar damages. By entering into this Agreement
               to arbitrate, the Parties expressly waive any claim for punitive,
               exemplary or any similar  damages.  The only damages  recoverable
               under this Agreement are compensatory damages.

          (g)  The procedures specified in this Article 13 shall be the sole and
               exclusive  procedures for the resolution of disputes  between the
               Parties arising out of or relating to this  Agreement;  provided,
               however, that a Party, without prejudice to the above procedures,
               may seek a preliminary  injunction or other provisional  judicial
               relief (which may include an order of specific  performance),  if
               in  its  sole   judgment   such  action  is  necessary  to  avoid
               irreparable  damage or to  preserve  the status  quo  (including,
               without  limitation,  in the  event of a breach  by  Schering  of
               Section  12.7(a)).  If a preliminary  injunction is granted,  the
               Parties  agree that the final  relief,  including but not limited
               to, the  issuance of a permanent  injunction,  will be decided by
               the neutral according to the procedures  outlined in this Article
               13.  If a  preliminary  injunction  is  denied,  the  preliminary
               injunction  action will be discontinued  and the neutral shall be
               responsible  for  deciding  the issue that was the subject of the
               preliminary   injunction  action,  and  all  costs  and  expenses
               incurred by the prevailing  Party in defending such a preliminary
               injunction  action  shall  be  reimbursed  by the  non-prevailing
               Party. Despite the preliminary injunction action the Parties will
               continue to participate in good faith in the ADR according to the
               procedures specified in this Article 13.


<PAGE>
 62


                                   ARTICLE 14

                            PROVISION FOR INSOLVENCY

          (a)  All  rights  and  licenses  granted  under  or  pursuant  to this
               Agreement  by ICN to Schering  are,  for all  purposes of Section
               365(n) of Title 11 of the U.S.  Code  ("Title  11"),  licenses of
               rights to  intellectual  property  as  defined  in Title 11.  ICN
               agrees during the  Exclusive  Period to maintain and preserve any
               current  copies of all such  intellectual  property  which are in
               existence and in its possession as of the  commencement of a case
               under Title 11 by or against  ICN. If a case is  commenced  by or
               against ICN under Title 11, then, unless and until this Agreement
               is  rejected  as  provided  in Title  11,  ICN (in any  capacity,
               including  debtor-in-possession)  and its  successors and assigns
               (including,  without  limitation,  a Title 11 Trustee)  shall, as
               Schering may elect in a written  request,  immediately  upon such
               request (A) (i) perform all of the  obligations  provided in this
               Agreement to be performed by ICN, or (ii) provide to Schering all
               such intellectual  property  (including all embodiments  thereof)
               held  by  ICN  and  such   successors   and  assigns  as  of  the
               commencement  of a case under Title 11 by or against ICN and from
               time to time thereafter, and (B) not interfere with the rights of
               Schering  as  provided  in  this  Agreement,   or  any  agreement
               supplementary  hereto, to such intellectual  property  (including
               all such embodiments thereof,  including any right of Schering to
               obtain such  intellectual  property (or such embodiment) from any
               other entity.

          (b)  If a Title 11 case is commenced by or against ICN, this Agreement
               is rejected as provided in Title 11 and Schering elects to retain
               its rights  hereunder  as  provided in Title 11, then ICN (in any
               capacity, including  debtor-in-possession) and its successors and
               assigns (including, without limitation, a Title 11 Trustee) shall
               provide to Schering all such intellectual property (including all
               embodiments  thereof) held by ICN and such successors and assigns
               immediately upon Schering's  written request  therefor.  Whenever
               ICN or any of its successors or assigns  provides to Schering any
               of  the  intellectual   property   licensed   hereunder  (or  any
               embodiment  thereof)  pursuant to this Article 14, Schering shall
               have the right to perform the  obligations  of ICN hereunder with
               respect to such intellectual property, but neither such provision
               nor such  performance by Schering shall release ICN from any such
               obligation  or  liability  for failing to perform  it;  provided,
               however,  that in such event  Schering  shall not be  entitled to
               compel specific performance by ICN under this Agreement except to
               the extent of enforcing the  exclusivity  of the license  granted
               hereunder.
<PAGE>
 63

          (c)  All rights,  powers,  remedies,  obligations  and  conditions  of
               Schering   provided   herein  are  in  addition  to  and  not  in
               substitution  for any and all  other  rights,  powers,  remedies,
               obligations  and  conditions  of ICN or Schering now or hereafter
               existing  at law or in  equity  (including,  without  limitation,
               Title 11) in the event of the  commencement of a Title 11 case by
               or against ICN.  Schering,  in addition to the rights,  power and
               remedies  expressly  provided  herein,  shall be  subject  to all
               obligations and conditions, and shall be entitled to exercise all
               other  such  rights  and  powers  and  resort to all  other  such
               remedies  as  may  now or  hereafter  exist  at law or in  equity
               (including,  including,  without  limitation,  Title  11) in such
               event.  The Parties agree that they intend the  foregoing  rights
               and  obligations  of  Schering  to  apply to the  maximum  extent
               permitted by law,  including  without  limitation for purposes of
               Title 11,  (i) the right of access to any  intellectual  property
               (including  all  embodiments  thereof) of ICN, or any third party
               with whom ICN  contracts  to perform an  obligation  of ICN under
               this  Agreement,  and, in the case of the third  party,  which is
               necessary for the  development,  registration  and manufacture of
               Product,  and (ii) the right to contract  directly with any third
               party  described  in clause (i) in this  sentence to complete the
               contracted work.


<PAGE>
 64

                                   ARTICLE 15

                                  MISCELLANEOUS

          15.1  Assignment.  Neither this Agreement nor any or all of the rights
and  obligations  of a Party  hereunder  shall  be  assigned,  delegated,  sold,
transferred,  sublicensed  or  otherwise  disposed  of, by  operation  of law or
otherwise, to any third party other than an Affiliate of such Party, without the
prior  written  consent  of the  other  Party,  and  any  attempted  assignment,
delegation, sale, transfer, sublicense or other disposition, by operation of law
or  otherwise,  of this  Agreement  or of any  rights or  obligations  hereunder
contrary to this  Section 15.1 shall be a material  breach of this  Agreement by
the  attempting  Party,  and shall be void and  without  force or  effect.  This
Agreement  shall be binding upon,  and inure to the benefit of, each Party,  its
Affiliates,  and its  permitted  successors  and  assigns.  Each Party  shall be
responsible  for the compliance by its Affiliates  with the terms and conditions
of this Agreement.

          15.2 Governing Law. This Agreement shall be governed,  interpreted and
construed in accordance with the laws of the State of New Jersey, without giving
effect to conflict of law principles.

          15.3 Waiver. A waiver of any breach or any provision of this Agreement
shall not be construed as a continuing  waiver of other  breaches of the same or
other provisions of this Agreement.

          15.4  Independent  Relationship.  Nothing  herein  contained  shall be
deemed  to  create  an   employment,   agency,   joint  venture  or  partnership
relationship between the Parties hereto or any of their agents or employees,  or
any other legal  arrangement  that would impose liability upon one Party for the
act or failure to act of the other Party.  Neither Party shall have any power to
enter into any contracts or commitments or to incur any  liabilities in the name
of, or on behalf of, the other Party,  or to bind the other Party in any respect
whatsoever.

<PAGE>
 65

          15.5  Export   Control.   This   Agreement  is  made  subject  to  any
restrictions concerning the export of products or technical information from the
United States of America which may be imposed upon or related to ICN or Schering
from  time  to  time  by  the  government  of  the  United  States  of  America.
Furthermore,  Schering  agrees that it will not export,  directly or indirectly,
any technical information acquired from ICN under this Agreement or any products
using such  technical  information  to any country  for which the United  States
government  or any  agency  thereof  at the time of  export  requires  an export
license or other  governmental  approval,  without  first  obtaining the written
consent to do so from the  Department  of Commerce or other agency of the United
States government when required by an applicable statute or regulation.

          15.6  Entire  Agreement;  Amendment.  This  Agreement,  including  the
Exhibits hereto, sets forth the complete,  final and exclusive agreement and all
the covenants, promises, agreements, warranties, representations, conditions and
understandings  between the Parties  hereto and  supersedes  and  terminates all
prior agreements and understandings between the Parties. There are no covenants,
promises, agreements, warranties, representations, conditions or understandings,
either oral or written,  between the Parties  other than as are set forth herein
and therein.  No subsequent  alteration,  amendment,  change or addition to this
Agreement shall be binding upon the Parties unless reduced to writing and signed
by an authorized officer of each Party.

          15.7  Notices.  Each notice  required or permitted to be given or sent
under this Agreement shall be given by facsimile transmission (with confirmation
copy by  registered  first-class  mail) or by  registered  or overnight  courier
(return  receipt  requested),  to the  Parties at the  addresses  and  facsimile
numbers indicated below.

                             If to ICN, to:
                             ICN Pharmaceuticals, Inc.
                             ICN Plaza
                             330 Hyland Avenue
                             Costa Mesa, California 92626
                             Attention:  President
                             Facsimile Number (714) 641-7276


                             If to Schering, to:

                             Schering-Plough Ltd.
                             Toepferstrasse 5
                             CH-6004 Lucerne,
                             Switzerland
                             Attention:  President
                             FAX:   41-41-52-1626


                             with copies to:

                             Schering-Plough International
                             2000 Galloping Hill Road
                             Kenilworth, NJ 07033
                             Attention:  President
                             FAX:   (908) 298-5379

<PAGE>
 66

                             and

                             Schering Corporation
                             1 Giralda Farms
                             Madison, NJ 07940
                             Attention:  Joseph C. Connors,
                             Senior Vice President and
                                 General Counsel
                             FAX:  (201) 822-1960

Any such notice shall be deemed to have been received on the earlier of the date
actually  received and the date five (5) days after the same was posted.  Either
Party may change its address or its FAX number by giving the other Party written
notice, delivered in accordance with this Section.

          15.8 Force  Majeure.  Failure of any Party to perform its  obligations
under this Agreement  (except the obligation to make payments when properly due)
shall not  subject  such Party to any  liability  or place them in breach of any
term or condition of this Agreement to the other Party if such failure is caused
by any  cause  beyond  the  reasonable  control  of such  non-performing  Party,
including without limitation acts of God, fire, explosion,  flood, drought, war,
riot, sabotage,  embargo, strikes or other labor trouble, failure in whole or in
part of suppliers  to deliver on schedule  materials,  equipment  or  machinery,
interruption  of or delay in  transportation,  a national  health  emergency  or
compliance  with any order or  regulation of any  government  entity acting with
color of right.  If a condition  constituting  force  majeure as defined  herein
exists for more than ninety (90)  consecutive  days,  the Parties  shall meet to
negotiate a mutually satisfactory solution to the problem, if practicable.


<PAGE>
 67
   
          15.9  Non-Solicitation.  To the maximum extent permitted by applicable
law, during the Exclusive  Period and for one (1) year thereafter, neither Party
shall, directly or indirectly, solicit any individual who is then an employee of
a Party or its  Affiliate  within  the  Territory  and who was  involved  in the
manufacturing,  marketing,  distribution  or  sale  of the  Product  under  this
Agreement, unless consented to in writing by the other Party.
    

          15.10  Severability.  If any  provision of this  Agreement is declared
invalid  or  unenforceable  by a  court  having  competent  jurisdiction,  it is
mutually  agreed that this  Agreement  shall endure except for the part declared
invalid or unenforceable  by, order of such court. The Parties shall consult and
use their best  efforts to agree upon a valid and  enforceable  provision  which
shall be a reasonable substitute for such invalid or unenforceable  provision in
light of the intent of this Agreement.


          15.11  Counterparts.  This Agreement shall become binding when any one
or more  counterparts  hereof,  individually or taken  together,  shall bear the
signatures of each of the Parties hereto.  This Agreement may be executed in any
number of  counterparts,  each of which shall be an  original as against  either
Party whose  signature  appears  thereon,  but all of which taken together shall
constitute but one and the same instrument.

          IN  WITNESS  WHEREOF,  the  Parties  hereto  have  caused  their  duly
authorized officers to execute this Agreement.

                        ICN PHARMACEUTICALS, INC.



                        By: /s/ DAVID C. WATT
                        ---------------------------------
                        Name: David C. Watt
                        Title: Executive Vice President,
                        General Counsel & Corporate Secretary

                        SCHERING-PLOUGH LTD.



                        By: /s/ DAVID POORVIN, Ph.D.
                        ------------------------------
                        Name:  David Poorvin, Ph.D.
                        Title: Prokurist


<PAGE>


                                    GUARANTEE

         In consideration of ICN's execution of the foregoing  Exclusive License
and Supply Agreement dated the date hereof  ("Agreement"),  Schering Corporation
("Schering")  hereby  guarantees  to ICN as  principal  and  not as  surety  the
performance by Schering-Plough Ltd. and any Affiliate of Schering-Plough Ltd. of
all of Schering-Plough Ltd.'s obligations under the Agreement.

         Schering hereby consents to the  jurisdiction of the courts  (including
the  Federal  courts)  in the State of  California  with  respect to any and all
disputes, claims, actions or proceedings arising out of the execution,  delivery
or performance  of this Guarantee and waives all rights it might  otherwise have
to object to venue before, and the jurisdiction of, such courts.  Nothing herein
shall in any way detract from or limit the  obligation  of the Parties to submit
any dispute  arising under the Agreement to  arbitration  and to be bound by any
decision  of the  neutral  rendered in  accordance  with the dispute  resolution
procedures set forth in Article 13 of the Agreement.

         This Guarantee shall survive the expiration or other termination of the
Agreement and shall survive and apply  regardless  of any  amendments,  waivers,
extensions, modifications or other changes in the obligations of Schering-Plough
Ltd. under the Agreement.

July 28, 1995                         SCHERING CORPORATION

                                      By: /s/ David Poorvin
                                      -----------------------
                                      Its: Vice President




<PAGE>

                                    Exhibit A
   
ICN shall not be required to supply Product at a price less than ICN's Cost of
Goods plus five percent.

Cost of Goods,  if ICN or any  Affiliate or third party is the  manufacturer  of
finished Product, shall include the following categories:

1.   Direct Materials

     Materials  used in the  manufacturing  process  that are traced  directly
     to the completed Product, including, but not limited to:

     -    Inert raw materials or excipients
     -    Active substances/ingredients
     -    Packaging components such as bottles, caps, labels, etc.

2.   Direct Labor

     The Cost of employees engaged in production activities that are directly
     identifiable with Product costs.  Excludes supervision (which is included
     in indirect labor) and production support activities such as inspection,
     plant and equipment maintenance labor, and material handling personnel.
     Direct Labor cost includes:

     -    Base pay, overtime, vacation and holidays, illness, personal time
          with pay, and shift differential.

     -    Cost of employee fringe benefits such as health and life insurance
          payroll taxes, welfare, pension and profit sharing.

3.   Indirect Manufacturing Costs

     Costs which are ultimately allocated to Product based on an appropriate
     method such as standard direct labor hours, tank hours, grams, vials,
     etc. of the operating departments.  These costs include:

     -    Indirect Production Labor - salaries of employees engaged in 
          production activities who are not classified as direct labor, 
          including supervision, clerical, etc.

     -    Costs of certain direct labor - employees not utilized for the 
          manufacturing of Product, such as training, downtime and general
          duties.

     -    Indirect Materials - supplies and chemicals which are used in the 
          manufacturing process and are not assigned to specific Product but
          are included in manufacturing overhead costs.  Includes supplies
          for which direct assignment to Product is not practical.
<PAGE>

     -    Utilities - expenses incurred for communications, fuel, electricity
          and water in providing power for production and other plant 
          equipment.

     -    Maintenance and repairs - amount of expense incurred in-house or
          purchased to provide services for plant maintenance and repairs of
          facilities and equipment.

     -    Other services - purchased outside services and rentals, such as the
          cost of security, ground maintenance, etc.

     -    Depreciation of plant and equipment utilizing the straight-line 
          method of calculation.

     -    Insurance - cost of comprehensive and other insurance necessary for 
          the safeguard of manufacturing plant and equipment.

     -    Taxes - expense incurred for taxes on real and personal property
          (manufacturing site, buildings and the fixed assets of equipment,
          furniture and fixtures, etc.).  If manufacturing site includes
          other operations (marketing, R&D, etc.), taxes are allocated to 
          manufacturing on the basis of total real and personal property.

     -    Cost of manufacturing service departments such as (where applicable):

                    -    Packaging Engineering
                    -    Manufacturing Maintenance
                    -    Industrial Engineering
                    -    Receiving and Warehousing
                    -    Production Scheduling
                    -    Inventory Scheduling
                    -    Plant Materials management
                    -    Central Weigh
                    -    Manufacturing Administration
                    -    Purchasing
                    -    Accounting


     -    Allocated costs of services provided to manufacturing including:
          (where applicable):

                    -    Cafeteria
                         -    Personnel Operations
                         -    Health and Safety Services
                    -    Division Engineering and Operations Services
                    -    Plant Services (housekeeping)
                    -    Manufacturing Information Services
                    -    Plant Power
                    -    Office of VP Manufacturing

Various basis are used for allocating these costs to manufacturing operating 
departments including head count, square feet, metered utilities use,
estimated services rendered, EDP computer hours, etc.

<PAGE>

4.   Quality Assurance Costs - direct labor and indirect costs for Quality
     Assurance departments' testing and approving materials used in manufac-
     turing and completed manufacturing batches and finished Product.  This
     includes all manufacturing in-process testing and testing of finished
     materials. Excluded from Product costs are QA costs related to researchd 
     and development, stability testing, etc.

The following are not included in manufacturing costs:

     a)   Inventory Carrying Costs

     b)   Regulatory Affairs costs

     c)   Pilot plant costs - research batches and other similar costs prior
          to turnover to manufacturing.  This excludes commercial goods
          produced by a research facility.

     d)   Costs incurred for special projects to establish and certify new
          production processes, batch sizes, product line improvements and
          new vendor certification of equipment and primary materials
          components.

     e)   Manufacturing start-up costs and initial one-time extraordinary
          manufacturing costs incurred prior to plant operations and
          achievement of a normal production activity level.  Includes costs
          training, testing, qualification/validation of new equipment and
          facilities and initial trial batches.

     f)   Significant idle capacity is eliminated from factory overhead and
          Product cost.
    
     g)   Shipping and other distribution costs.

     h)   Product liability and/or business interruption insurance expenses.
    
<PAGE>
                                    Exhibit B


                                   [REDACTED]

                             Product Specifications






<PAGE>

                                    Exhibit C



                            STOCK PURCHASE AGREEMENT

                                 BY AND BETWEEN

                            ICN PHARMACEUTICALS, INC.

                                       AND

                           SCHERING-PLOUGH CORPORATION

                                  July 28, 1995


<PAGE>
<TABLE>
<CAPTION>

                                TABLE OF CONTENTS
                                                                           PAGE
<S> <C>                                                                     <C>

1.   Purchase and Sale of Shares............................................-1-
     1.1      Purchase of Shares............................................-1-
     1.2      Closing Dates; Delivery.......................................-2-

2.   Representations and Warranties of the Company..........................-3-
     2.1      Organization and Corporate Power..............................-3-
     2.2      Authorization.................................................-3-
     2.3      Capitalization................................................-4-
     2.4      Subsidiaries..................................................-4-
     2.5      Financial Statements..........................................-4-
     2.6      Absence of Undisclosed Liabilities............................-5-
     2.7      Absence of Certain Developments...............................-5-
     2.8      Title to Properties...........................................-5-
     2.9      Tax Matters...................................................-5-
     2.10     Intellectual Property.........................................-5-
     2.11     Effect of Transactions........................................-6-
     2.12     No Governmental Consent or Approval Required..................-6-
     2.13     Litigation....................................................-7-
     2.14     Securities Laws...............................................-7-
     2.15     Business......................................................-7-
     2.16     Brokerage.....................................................-8-
     2.17     Insurance.....................................................-8-
     2.18     Environmental and Safety Laws.................................-8-
     2.19     Retirement Obligations, etc...................................-8-
     2.20     Investment Company............................................-8-
     2.21     Registration Rights...........................................-8-
     2.22     Employees.....................................................-8-
     2.23     Absence of Certain Business Practices.........................-9-
     2.24     Disclosure....................................................-9-

3.   Representations and Warranties of Schering and Other
     Agreements.............................................................-9-
     3.1      Representations and Warranties................................-9-
     3.2      Further Provisions Regarding Disposition.....................-12-
     3.3      Legends......................................................-12-

4.   Conditions to Schering's Obligations at Closing.......................-12-
     4.1      Initial Milestone Closing....................................-12-
     4.2      U.S. Milestone Closing ......................................-14-
     4.3      EU Milestone Closing.........................................-15-
     
5.   Conditions of the Company's Obligations at Closing....................-16-
     5.1      Initial Milestone Closing....................................-16-
     5.2      U.S. Milestone Closing.......................................-17-
     5.3      EU Milestone Closing.........................................-18-

  
<PAGE>

6.   Registration of Common Stock; Covenants of the Company;
     Other Agreements......................................................-18-
     6.1      Definitions..................................................-18-
     6.2      Demand Registration..........................................-19-
     6.3      Piggyback Registration.......................................-21-
     6.4      Registration Expenses........................................-23-
     6.5      Registration Procedures......................................-23-
     6.6      Form S-3 Registration........................................-25-
     6.7      Indemnification..............................................-26-
     6.8      Reports under Exchange Act...................................-29-
     6.9      Transferability..............................................-30-
     6.10     Cross-Default................................................-30-
     6.11     Limitation of Liability......................................-30-

7.   Miscellaneous.........................................................-30-
     7.1      Survival of Warranties.......................................-30-
     7.2      Incorporation by Reference...................................-31-
     7.3      Parties in Interest..........................................-31-
     7.4      Amendments and Waivers.......................................-31-
     7.5      Governing Law................................................-31-
     7.6      Notices......................................................-31-
     7.7      Counterparts.................................................-32-
     7.8      Effect of Headings...........................................-32-
     7.9      Entire Agreement.............................................-32-
     7.10     Publicity....................................................-32-
     7.11     Severability.................................................-32-
</TABLE>

<PAGE>
 1
                            STOCK PURCHASE AGREEMENT


         This STOCK PURCHASE AGREEMENT (the "Agreement") is made as of this 28th
day of  July,  1995,  by and  between  ICN  Pharmaceuticals,  Inc.,  a  Delaware
corporation  (the  "Company")  and  Schering-Plough  Corporation,  a New  Jersey
corporation ("Schering").

                                     RECITAL

         The  Company  and  Schering  are  entering  into this  Agreement  as an
inducement  for the  Company to enter into that  certain  Exclusive  License and
Supply Agreement dated of even date herewith (the "License Agreement"). Pursuant
to this Agreement, Schering intends to invest in the Company and the proceeds of
such  investment  will be used by the Company for  general  corporate  purposes.
Other than the right of Schering to vote its shares of Company  common  stock as
Schering deems  appropriate,  nothing contained in this Agreement is intended to
confer,  or be deemed to confer,  on Schering the power to direct,  influence or
control the management, policies or operations of the Company.

                          THE PARTIES AGREE AS FOLLOWS:

         1. Purchase and Sale of Shares.  Subject to the terms and conditions of
this Agreement and on the basis of the  representations and warranties set forth
herein, the Company agrees to sell to Schering,  and Schering agrees to purchase
from the Company,  shares of the Company's common stock (the "Common Stock"), as
set forth  below.  The shares of Common  Stock  being  purchased  hereunder  are
hereinafter referred to as the "Shares."

          1.1 Purchase of Shares.
   
          (a) On the Initial  Milestone  Closing  Date (as defined  below),  the
Company shall sell to Schering and Schering shall purchase from the Company, for
a total  consideration  of  [REDACTED],  that number of Shares  which equals (A)
[REDACTED]  divided by (B) the  average  closing  price of the  Common  Stock as
quoted on the New York Stock Exchange ("NYSE") for the 20 trading days ending on
the day immediately preceding the Initial Milestone Closing Date (or, if a stock
split or  recapitalization  occurred during such 20 day trading day period, then
for the 20  trading  day  period  ending  on the  date of such  stock  split  or
recapitalization).
    

   
          (b) On the U.S. Milestone Closing Date (as defined below), the Company
shall sell to Schering and Schering shall purchase from the Company, for a total
consideration  of [REDACTED],  that number of Shares which equals (A) [REDACTED]
divided by (B) the average  closing  price of the Common  Stock as quoted on the
NYSE for the 20 trading days ending on the day  immediately  preceding  the U.S.
Milestone Closing Date (or, if a stock split or recapitalization occurred during
such 20 trading day period period,  then for the 20 trading day period ending on
the date of such stock split or recapitalization).
    
   
          (c) On the EU Milestone  Closing Date (as defined below),  the Company
shall sell to Schering and Schering shall purchase from the Company, for a total
consideration  of [REDACTED]  that number of Shares which equals (A)  [REDACTED]
divided  by (B)  the  lower  of  (i)  [REDACTED]  (adjusted  for  stock  splits,
recapitalizations,  reclassifications or similar events occurring after the date
hereof and prior to the EU Milestone  Closing Date) or (ii) the average  closing
price of the Common  Stock as quoted on the NYSE for the 20  trading  day period
ending on the day immediately  preceding the EU Milestone Closing Date (or, if a
stock split or recapitalization occurred during such 20 trading day period, then
for the 20  trading  day  period  ending  on the  date of such  stock  split  or
recapitalization).
    

<PAGE>
 2
   
          (a) Within  30  days  following the satisfaction of the conditions set
forth in Section  4.1 below,  the  closing  of the  purchase  and sale of Shares
hereunder as set forth in Section 1.1(a) above (the "Initial Milestone Closing")
shall be held at the offices of Schering-Plough Corporation (or such other place
as the parties shall mutually  agree) at such time as the parties shall mutually
agree (the date of the  Initial  Milestone  Closing is referred to herein as the
"Initial Milestone Closing Date"). At the Initial Milestone Closing, the Company
shall  deliver  to  Schering  a  certificate  or  certificates,   registered  in
Schering's  name,  representing  the Shares  purchased at the Initial  Milestone
Closing,  and Schering shall pay the total consideration for such Shares by wire
transfer in immediately available funds to an account designated by the Company.
    
       
          (b) Within 30 days  following the  satisfaction  of the conditions set
forth in Section  4.2 below,  the  closing  of the  purchase  and sale of Shares
hereunder as set forth in Section  1.1(b) above (the "U.S.  Milestone  Closing")
shall be held at the offices of Schering-Plough Corporation (or such other place
as the parties shall mutually  agree) at such time as the parties shall mutually
agree (the date of the U.S. Milestone Closing is referred to herein as the "U.S.
Milestone  Closing  Date").  At the U.S.  Milestone  Closing,  the Company shall
deliver to Schering a  certificate  or  certificates,  registered  in Schering's
name,  representing  the Shares  purchased at the U.S.  Milestone  Closing,  and
Schering shall pay the total  consideration  for such Shares by wire transfer in
immediately available funds to an account designated by the Company.
    

          1.2  Closing dates; Delivery.
   
          (c) Within 30 days following the satisfaction of the conditions set
forth in Section  4.3 below,  the  closing  of the  purchase  and sale of Shares
hereunder  as set forth in Section  1.1(c)  above (the "EU  Milestone  Closing")
shall be held at the offices of Schering-Plough Corporation (or such other place
as the parties shall mutually  agree) at such time as the parties shall mutually
agree (the date of the EU  Milestone  Closing is  referred  to herein as the "EU
Milestone Closing Date"). At the EU Milestone Closing, the Company shall deliver
to Schering a  certificate  or  certificates,  registered  in  Schering's  name,
representing  the Shares  purchased  at the EU Milestone  Closing,  and Schering
shall  pay  the  total  consideration  for  such  Shares  by  wire  transfer  in
immediately available funds to an account designated by the Company.
    

<PAGE>
 3

          2.  Representations  and  Warranties  of the Company.  Company  hereby
represents and warrants to Schering that:

          2.1  Organization  and Corporate  Power.  The Company is a corporation
duly  organized,  validly  existing and in good  standing  under the laws of the
State of Delaware and is qualified  to do business as a foreign  corporation  in
each  jurisdiction  where  failure to so qualify  would have a Material  Adverse
Effect on the  Company.  For  purposes of this  Agreement,  a "Material  Adverse
Effect" or a "Material  Adverse Change" shall mean, with respect to the Company,
any adverse  effect or change in the condition  (financial or other),  business,
results of  operations,  assets,  liabilities or operations of the Company or on
the ability of the Company to consummate  any of the  transactions  contemplated
hereby,  or any event or  condition  that would,  with or without the passage of
time,  constitute a "Material  Adverse Effect" or "Material Adverse Change." The
Company  has full  power  and  authority  to own its  property,  to carry on its
business as presently  conducted and to carry out the transactions  contemplated
hereby.  The  copies  of the  Certificate  of  Incorporation  and  Bylaws of the
Company,  as  amended to date,  which have been  furnished  to  Schering  by the
Company, are correct and complete.

          2.2 Authorization.  The Company has full power to execute, deliver and
perform this Agreement and each other  agreement  entered into by the Company in
connection with this  Agreement.  Each such agreement has been duly executed and
delivered by the Company and is the legal,  valid and, assuming due execution by
the other  parties  hereto  and  thereto,  binding  obligation  of the  Company,
enforceable  against  the  Company  in  accordance  with its  terms,  subject to
applicable bankruptcy,  insolvency,  moratorium,  reorganization or similar laws
affecting creditors,  rights generally, and to general equitable principles. The
execution,  delivery and  performance  of this  Agreement,  including  the sale,
issuance and delivery of the Shares and each other agreement entered into by the
Company in  connection  with this  Agreement,  has been duly  authorized  by all
necessary corporate action of the Company.

<PAGE>
4



          2.3 Capitalization. The entire authorized capital stock of the Company
consists of 100,000,000  shares of Common Stock, of which 29,188,829  shares are
issued and outstanding,  and 1,000,000 shares of Series A Preferred Stock,  none
of which are issued and outstanding.  The shares of Common Stock outstanding are
duly authorized,  validly issued and outstanding,  fully paid and nonassessable,
and were issued in compliance with all applicable  federal and state  securities
laws. No shares of Common Stock are held in the Company's treasury.  When issued
in  accordance  with  the  terms  of this  Agreement,  the  Shares  will be duly
authorized, validly issued and outstanding,  fully paid and nonassessable,  free
of any  preemptive  rights  or  rights  of first  refusal  and will be issued in
compliance  with all applicable  federal and state  securities  laws.  Except as
disclosed in the Financial  Statements and SEC Filings (each as defined  below),
there are no outstanding  warrants,  rights of first  refusal,  options or other
rights to purchase or acquire,  or  exchangeable  for or  convertible  into, any
shares of Common  Stock.  The Company has  reserved  5,333,000  shares of Common
Stock under its stock option plans.  There are no preemptive rights with respect
to the  issuance  or  sale  by the  Company  of  any  of  its  securities.  Upon
consummation of the transactions contemplated hereby, Schering will acquire good
and  valid  title to the  Shares,  free and  clear of any  encumbrances,  liens,
claims, charges or assessments of any nature whatsoever.

          2.4 Subsidiaries. The Company has no subsidiaries, except as set forth
in Schedule 2.4.

          2.5 Financial Statements. The Company has delivered to Schering a copy
of the Company's  Annual Report on Form 10-K for the fiscal year ended  December
31, 1994 (the "1994 10-K"),  containing  audited balance  sheets,  statements of
operations  and cash flows for the Company for the fiscal  years ended  December
31, 1994, December 31, 1993, and December 31, 1992 (the "Financial  Statements")
and copies of the  Company's  Quarterly  Reports  on Form 10-Q for the  quarters
ended  March 31,  1994,  June 30,  1994,  September  30, 1994 and March 31, 1995
(collectively,  together with the 1994 10-K, the "SEC  Filings").  The Financial
Statements  are  complete  and  correct  in all  matters  and  respects,  are in
accordance  with the books and  records of the  Company,  have been  prepared in
accordance with generally accepted accounting principles,  consistently applied,
and fairly  present the  financial  position of the Company as of each such date
and the results of operations for each such period then ended.

<PAGE>
 5

          2.6 Absence of  Undisclosed  Liabilities.  Except as and to the extent
reflected or stated in the SEC Filings and the Financial Statements,  and except
for  liabilities  arising in the ordinary  course of its business and consistent
with  past  practice,  and  liabilities  not  required  to be set  forth  in the
Financial  Statements,  the  Company  has  no  material  debts,  liabilities  or
obligations of any nature, whether accrued,  contingent or absolute, assigned or
otherwise, or whether due or to become due.

          2.7 Absence of Certain Developments.  Since January 1, 1995, except as
disclosed  in the  Financial  Statements,  there  has not been (a) any  Material
Adverse Change with respect to the Company,  (b) any declaration,  setting aside
or payment of any  dividend or other  distribution  with  respect to the capital
stock of the  Company,  (c) loss,  destruction  or damage to any property of the
Company, whether or not insured, which had or may have a Material Adverse Effect
on the Company,  (d) any issuance of any stock, bonds or other securities of the
Company or options,  warrants or rights or agreements or commitments to purchase
or issue such securities or grant such options,  warrants or rights,  or (e) any
change in the accounting methods or practices by the Company.

          2.8  Title  to  Properties.  Except  as  disclosed  in  the  Financial
Statements,  the  Company  has  good and  marketable  title  to,  or has a valid
leasehold  interest in, or a valid  license for, all of the material  properties
and  assets  reflected  in the  Financial  Statements,  free  and  clear  of all
mortgages,  security interests,  liens,  restrictions or encumbrances other than
(i) the lien of current taxes not yet due and payable,  and (ii) possible  minor
liens  and  encumbrances  which  do  not  in any  case,  individually  or in the
aggregate,  materially detract from the value of the property subject thereto or
materially  impair the  operations  of the Company,  and would not result in the
occurrence of a Material  Adverse  Change,  and which have not arisen  otherwise
than in the ordinary course of business.

          2.9 Tax Matters.  The provisions for taxes in the Financial Statements
are sufficient for the payment of all accrued and unpaid federal,  state, county
and local taxes of the Company.

          2.10 Intellectual Property

          (a) The Company has good title to and  ownership of, free and clear of
all liens,  claims and  encumbrances  of any nature,  or a valid license to, all
patents,  patent rights, patent applications,  inventions,  trademarks,  service
marks, trade names, copyrights and information, proprietary rights and processes
necessary to the proper  conduct of its business as described in the SEC Filings
and the Financial  Statements (the "Proprietary  Rights");  and (ii) to the best
knowledge of the Company,  such business does not conflict with or constitute an
infringement of the rights of others.

          (b) The Company has not received any communications alleging that, and
has no knowledge  that the Company has violated or, by conducting  its business,
would violate any of the patents, patent applications,  inventions,  trademarks,
service  marks,   trade  names,   copyrights  or  trade  secrets,   information,
proprietary rights or processes of any other person or entity.

<PAGE>
 6

          (c) No other firm, corporation, association or person (i) has notified
the Company that such firm,  corporation,  association or person is claiming any
ownership of or right to use any of the  Proprietary  Rights or (ii) to the best
of the Company's  knowledge,  is infringing upon any such Proprietary  Rights in
any way that could  reasonably be expected to have a Material  Adverse Effect on
the Company.

          2.11 Effect of Transactions.  The execution,  delivery and performance
of this Agreement and the transactions  contemplated hereby, and compliance with
the provisions  hereof by the Company,  do not and will not, with or without the
passage of time or the giving of notice or both,  (a)  violate,  in any material
respect, any provision of law, statute,  rule or regulation or any ruling, writ,
injunction,  order,  judgment or decree of any court,  administrative  agency or
other  governmental  body or (b) conflict with or result in any breach of any of
the terms, conditions or provisions of, or constitute a default (or give rise to
any right of termination,  cancellation or acceleration) under, or result in the
creation of any lien,  security interest,  charge or encumbrance upon any of the
properties or assets of the Company under the  Certificate of  Incorporation  or
Bylaws,  as amended to date,  of the Company or any  material  note,  indenture,
mortgage,  lease,  agreement,   contract,   purchase  order  or  other  material
instrument, document or agreement to which the Company is a party or by which it
or any of its  properties  or assets is bound or  affected,  except as would not
have a Material Adverse Effect on the Company.

          2.12 No Governmental  Consent or Approval  Required.  Based in part on
the  representations  made  by  Schering  in  Section  3 of this  Agreement,  no
authorization,   consent,  approval  or  other  order  of,  declaration  to,  or
registration,  qualification,  designation or filing with, any federal, state or
local  governmental  agency or body is required  for or in  connection  with the
valid and lawful  authorization,  execution  and delivery by the Company of this
Agreement or any other agreement  entered into by the Company in connection with
this Agreement, and the consummation of the transactions  contemplated hereby or
thereby,  or for or in  connection  with the  valid  and  lawful  authorization,
issuance,  sale and  delivery  of the Shares  other than the  qualification  (or
taking  of  such  action  as  may be  necessary  to  secure  an  exemption  from
qualification  if  available)  of the  offer  and sale of the  Shares  under the
applicable state securities laws, which filings and qualifications, if required,
will be accomplished in a timely manner so as to comply with such  qualification
or exemption from qualification requirements.


<PAGE>
 7

          2.13 LITIGATION.  Except as disclosed in the SEC Filings,  there is no
claim, arbitration, action, suit, proceeding,  investigation or inquiry pending,
or to the best knowledge of the Company,  threatened against the Company,  which
questions the validity of this Agreement or any other agreement  entered into by
the Company in  connection  with this  Agreement  or the right of the Company to
enter into any such  agreements or to consummate the  transactions  contemplated
hereby  or  thereby,  or  which  might  result,  either  individually  or in the
aggregate,  in any Material Adverse Effect on the Company,  or any change in the
current equity ownership of the Company.  The information  described on Schedule
2.13 is not material to the business, assets or operations of the Company or its
subsidiaries  (taken as a whole),  no  Current  Report on Form 8-K need be filed
with  the  Securities  and  Exchange  Commission  (the  "SEC")  to  report  such
information,  and such information will be disclosed in the Company's  Quarterly
Report on Form 10-Q for the second quarter to be filed with the SEC on or before
August 14, 1995. The Company is not a party to, or subject to the provisions of,
any order,  writ,  injunction,  judgment or decree of any court or  governmental
agency or  instrumentality  which  would have a Material  Adverse  Effect on the
Company.

          2.14 SECURITIES  LAWS.  Assuming that Schering's  representations  and
warranties  contained in Section 3 of this  Agreement are true and correct,  the
offer,  issuance  and  sale of the  Shares  are  and  will be  exempt  from  the
registration and prospectus delivery requirements of the Securities Act of 1933,
as amended  (the "1933 Act"),  and have been  registered  or  qualified  (or are
exempt from registration and  qualification)  under the registration,  permit or
qualification requirements of all applicable state securities laws.

          2.15 BUSINESS. The Company has all franchises,  permits,  governmental
licenses and other governmental rights and privileges  necessary to permit it to
own its  properties  and to conduct  its  present  business  or its  business as
proposed to be  conducted,  except  where the  failure to hold such  franchises,
permits, governmental licenses or other rights would not have a Material Adverse
Effect on the Company.

<PAGE>
 8


          2.16  BROKERAGE.  There are no claims  for  brokerage  commissions  or
finder's  fees or  similar  compensation  in  connection  with the  transactions
contemplated by this Agreement based on any arrangement  made by or on behalf of
the Company and the  Company  agrees to  indemnify  and hold  Schering  harmless
against any damages incurred as a result of any such claim.

          2.17  INSURANCE.  The Company  maintains  in full force such types and
amounts of insurance issued by issuers of recognized responsibility insuring the
Company,  with respect to its  liability,  workers'  compensation,  business and
properties,  in such  amounts and against  such losses and risks as are adequate
against risks usually insured against by other corporations, entities or persons
operating similar businesses and properties.

          2.18  ENVIRONMENTAL  AND  SAFETY  LAWS.  To the best of the  Company's
knowledge,  except with respect to the Portland facility as previously described
to Schering (which to the best knowledge of the Company will not have a Material
Adverse Effect on the Company),  the Company is in substantial  compliance  with
every  applicable  statute,  law or regulation  relating to the  environment  or
occupational  health and safety,  and no material  expenditures  are required in
order to comply with any such existing  statute,  law or  regulation,  except in
each case as would not have a Material Adverse Effect on the Company.

          2.19  RETIREMENT  OBLIGATIONS,  ETC.  The  Company  does  not have any
Employee Benefit Plan, as defined in the Employee Retirement Income Security Act
of 1974 other than as disclosed in the SEC Filings or the Financial Statements.

          2.20 INVESTMENT  COMPANY.  The Company is not an "investment  company"
within the meaning of the  Investment  Company Act of 1940,  as amended and will
not, as a result of the transactions  contemplated hereby, become an "investment
company."

          2.21  REGISTRATION  RIGHTS.  Except with respect to the obligations of
the Company to register its securities on Form S-8 in connection  with its stock
option plans,  the Company is not under any  contractual  obligation to register
any of its currently  outstanding  securities or any of its securities  that may
hereafter be issued.

          2.22 EMPLOYEES. The Company has complied in all material respects with
all applicable state and federal laws and regulations  respecting employment and
employment  practices,  terms and conditions of employment,  wages and hours and
other laws related to employment.

<PAGE>
 9

          2.23  ABSENCE  OF  CERTAIN  BUSINESS  PRACTICES.  To the  best  of the
Company's  knowledge,  none of the Company,  or any agent of the Company, or any
other  person or entity  acting on  behalf of or  associated  with the  Company,
acting  alone or  together,  has:  (a)  received,  directly or  indirectly,  any
rebates,  payments,  commissions,  promotional  allowances or any other economic
benefits,  regardless  of their  nature or type,  from any  customer,  supplier,
employee  or agent of any  customer  or  supplier,  official  or employee of any
government (domestic or foreign) or other person; or (b) directly or indirectly,
given or agreed to give any  money,  gift or similar  benefit  to any  customer,
supplier, employee or agent of any customer or supplier, official or employee of
any government  (domestic or foreign),  or any political  party or candidate for
office  (domestic or foreign) or other person or entity who was, is or may be in
a position to help or hinder the  business of the Company (or assist the Company
in connection with any actual or proposed transaction) which (i) may subject the
Company  to any  damage  or  penalty  in any  civil,  criminal  or  governmental
litigation  or  proceeding,  (ii) if not  continued  in the  future,  may have a
Material Adverse Effect on the Company or subject the Company to suit or penalty
in any private or governmental litigation or proceeding.  The Company's existing
accounting  controls and  procedures  are  sufficient  to cause it to materially
comply with the Foreign Corrupt Practices Act of 1977, as amended  ("FCPA"),  in
all areas, except as to operations in the former country of Yugoslavia where, to
the best of the Company's  knowledge (without the benefit of an internal audit),
it believes that its existing  accounting controls and procedures are sufficient
to cause it to materially comply with the FCPA.

<PAGE> 
10

          2.24  DISCLOSURE.  The  Company  has  provided  Schering  with all the
information  that it has requested for deciding  whether to purchase the Shares.
Neither the SEC Filings,  nor the  representations and warranties of the Company
contained in this  Agreement  and schedules  delivered in  connection  herewith,
contain any untrue statement of a material fact or omit to state a material fact
necessary to make the statements herein or therein,  at the time and in light of
the circumstances under which they were made, not misleading.

          3. REPRESENTATIONS AND WARRANTIES OF SCHERING AND OTHER AGREEMENTS.

          3.1  REPRESENTATIONS  AND WARRANTIES.  Schering hereby  represents and
warrants to the Company that:

          (a) ORGANIZATION  AND CORPORATE POWER.  Schering is a corporation duly
organized,  validly existing and in good standing under the laws of the State of
New Jersey and is  qualified  to do  business as a foreign  corporation  in each
jurisdiction where failure to so qualify would have a Material Adverse Effect on
Schering. Schering has full power and authority to own its property, to carry on
its  business  as  presently   conducted  and  to  carry  out  the  transactions
contemplated hereby.

          (b)  AUTHORIZATION.  Schering  has full power to execute,  deliver and
perform  this  Agreement  and each other  agreement  entered into by Schering in
connection with this  Agreement.  Each such agreement has been duly executed and
delivered by Schering and is the legal, valid and, assuming due execution by the
other parties hereto and thereto,  binding  obligation of Schering,  enforceable
against Schering in accordance with its terms, subject to applicable bankruptcy,
insolvency,  moratorium,  reorganization  or similar laws  affecting  creditors,
rights generally, and to general equitable principles.  The execution,  delivery
and  performance  of this  Agreement  and each other  agreement  entered into by
Schering in  connection  with this  Agreement,  has been duly  authorized by all
necessary corporate action of Schering.

          (c) NO GOVERNMENTAL  CONSENT OR APPROVAL  REQUIRED.  No authorization,
consent,   approval  or  other  order  of,   declaration  to,  or  registration,
qualification,   designation  or  filing  with,  any  federal,  state  or  local
governmental  agency or body is required for or in connection with the valid and
lawful  authorization,  execution and delivery by Schering of this  Agreement or
any other agreement  entered into by Schering in connection with this Agreement,
and the consummation of the transactions contemplated hereby or thereby.

          (d)  LITIGATION.  Except as disclosed in  Schering's  filings with the
Securities  and Exchange  Commission,  there is no claim,  arbitration,  action,
suit, proceeding or investigation pending, or to the best knowledge of Schering,
threatened  against Schering,  which questions the validity of this Agreement or
any other  agreement  entered into by Schering in connection with this Agreement
or the right of Schering to enter into any such  agreements or to consummate the
transactions  contemplated  hereby or  thereby,  or which might  result,  either
individually  or in the aggregate,  in any Material  Adverse Effect on Schering.
Schering is not a party to, or subject to the  provisions  of, any order,  writ,
injunction,   judgment  or  decree  of  any  court  or  governmental  agency  or
instrumentality which would have a Material Adverse Effect on Schering.

<PAGE>
 11

          (e) PURCHASE  ENTIRELY  FOR OWN ACCOUNT.  The Shares to be received by
Schering will be acquired for investment  for  Schering's own account,  not as a
nominee or agent and not with a view to the distribution of any portion thereof.
Schering has no present intention of selling,  granting any participation in, or
otherwise  distributing  the  Shares.  Schering  does  not  have  any  contract,
undertaking,  agreement or  arrangement  with any person to sell,  transfer,  or
grant  participation to such person or to any third person,  with respect to any
of the Shares.

          (f) RESTRICTIONS ON DISPOSITION.  Schering  covenants that in no event
will  it  dispose  of any  of the  Shares  (other  than  pursuant  to  Rule  144
promulgated  under  the 1933 Act  ("Rule  144") or  pursuant  to a  registration
statement filed with the Securities and Exchange Commission (the "SEC") pursuant
to the 1933 Act) unless and until (i) Schering  shall have  notified the Company
of the  proposed  disposition  and  shall  have  furnished  the  Company  with a
statement of the circumstances surrounding the proposed disposition; and (ii) if
requested  by the Company,  Schering  shall have  furnished  the Company with an
opinion of Schering's counsel,  reasonably satisfactory in form and substance to
the Company and the Company's  counsel,  to the effect that (a) such disposition
will not  require  registration  under  the 1933 Act or (b)  appropriate  action
necessary for compliance  with the 1933 Act and any applicable  state,  local or
foreign law has been taken. The restrictions on transfer imposed by this Section
3.1(f)  shall cease and  terminate as to the Shares  when:  (i) such  securities
shall have been effectively registered under the 1933 Act and sold by the holder
thereof in  accordance  with such  registration;  or (ii) an opinion of the kind
described in the  preceding  sentence  states that all future  transfers of such
securities  by the holder  thereof would be exempt from  registration  under the
1933 Act.  Each  certificate  evidencing  the Shares  shall bear an  appropriate
restrictive  legend  as set  forth  in  Section  3.3  below,  except  that  such
certificate  shall not be required to bear such legend after a transfer  thereof
if  the  transfer  was  made  in  compliance  with  Rule  144 or  pursuant  to a
registration statement or, if the opinion of counsel referred to above is issued
and provides  that such legend is not required in order to establish  compliance
with any provisions of the 1933 Act.

          (g) RECEIPT OF INFORMATION.  Schering has been furnished access to the
business  records  of the  Company  and  all  such  additional  information  and
documents  Schering has requested and has been  afforded an  opportunity  to ask
questions of and receive answers from  representatives of the Company concerning
the terms and conditions of this Agreement and the purchase of the Shares.

          (h)  BROKERAGE.  There  are no claims  for  brokerage  commissions  or
finder's  fees or  similar  compensation  in  connection  with the  transactions
contemplated  by this Agreement based on any arrangement or agreement made by or
on behalf of  Schering,  and Schering  agrees to indemnify  and hold the Company
harmless against any damages incurred as a result of any such claims.


<PAGE>
 12

          3.2 FURTHER PROVISIONS REGARDING DISPOSITION.

          (a) TRANSFER TO AFFILIATES.  Notwithstanding the provisions of Section
3.1(f) above, no registration statement or opinion of counsel shall be necessary
for a  transfer  by  Schering  of the  Shares to a  subsidiary,  shareholder  or
affiliate of Schering,  if the transferee agrees in writing to be subject to the
terms hereof to the same extent as if such transferee were Schering hereunder.

          (b) NEW  CERTIFICATES.  Whenever the  restrictions  imposed by Section
3.1(f) shall  terminate as herein  provided,  the holder of the securities as to
which such  restrictions  have terminated  shall be entitled to receive from the
Company,  without expense,  one or more new certificates not bearing restrictive
legends and not  containing  any reference to the  restrictions  imposed by this
Agreement.

          3.3 LEGENDS.  Subject to Sections 3.1(f) and 3.2(b),  the certificates
evidencing the Shares shall bear substantially the following legends:

          (a) THESE SECURITIES HAVE NOT BEEN REGISTERED UNDER THE SECURITIES ACT
OF 1933. THEY MAY NOT BE SOLD,  OFFERED FOR SALE, PLEDGED OR HYPOTHECATED IN THE
ABSENCE OF A  REGISTRATION  STATEMENT IN EFFECT WITH  RESPECT TO THE  SECURITIES
UNDER SUCH ACT OR AN OPINION OF COUNSEL  SATISFACTORY  TO THE COMPANY  THAT SUCH
REGISTRATION IS NOT REQUIRED OR UNLESS SOLD PURSUANT TO RULE 144 OF SUCH ACT.

          (b)  Any  legend  required  by  the  laws  of  any  other   applicable
jurisdiction.

          4. CONDITIONS TO SCHERING'S OBLIGATIONS AT CLOSING.

          4.1 INITIAL  MILESTONE  CLOSING.  The  obligation  of  Schering  under
Section 1.1(a) of this Agreement to purchase the Shares at the Initial Milestone
Closing is subject to the fulfillment on or before the Initial Milestone Closing
of each of the following conditions:

<PAGE>
 13


          (a) REPRESENTATIONS AND WARRANTIES. The representations and warranties
of the  Company  contained  in  Section  2 above  shall be true on and as of the
Initial   Milestone   Closing   Date  with  the  same   effect  as  though  such
representations  and warranties had been made on and as of the Initial Milestone
Closing Date.

          (b)  PERFORMANCE.  The Company shall have  performed and complied with
all agreements, obligations, and conditions contained in this Agreement that are
required  to be  performed  or  complied  with by it on or  before  the  Initial
Milestone Closing Date.

          (c) QUALIFICATIONS. All authorizations, approvals, or permits, if any,
of any governmental  authority or regulatory body of the United States or of any
state that are required for  consummation  of the  transactions  contemplated by
this Agreement shall have been duly obtained, including, without limitation, the
expiration  or earlier  termination  of any notice and waiting  period under the
Hart-Scott-Rodino  Antitrust  Improvements Act of 1976, as amended, and shall be
effective on and as of the Initial Milestone Closing Date.

          (d) PROCEEDINGS AND DOCUMENTS.  All corporate and other proceedings in
connection with the transactions  contemplated at the Initial  Milestone Closing
and all documents incident thereto shall be reasonably  satisfactory in form and
substance to Schering and Schering's  counsel,  and they shall have received all
such  counterpart  original and  certified or other copies of such  documents as
they may reasonably request.

          (e) OTHER  AGREEMENTS.  The License Agreement shall have been executed
and delivered by the Company.

          (f) OPINION OF COMPANY  COUNSEL.  Schering  shall have  received  from
counsel for the Company an opinion addressed to Schering  substantially covering
the matters set forth in Sections  2.1,  2.2, 2.3 (as to the due  authorization,
valid issuance, full payment and nonassessability of the Shares), 2.12, 2.13 and
2.14 (as to federal law).

          (g) COMPLIANCE CERTIFICATE. The Chief Executive Officer of the Company
shall  deliver  to  Schering  at the  Initial  Milestone  Closing a  certificate
certifying that the conditions specified in Sections 4.1(a),  4.1(b), and 4.1(c)
hereof have been  fulfilled and stating that there has been no Material  Adverse
Change in the Company since January 1, 1995.

          (h)  APPROVAL.   This  Agreement,   the  License   Agreement  and  the
transactions  contemplated  hereby and thereby  shall have been  approved by the
board of directors of Schering.

          (i) [REDACTED]

<PAGE>
 14


          4.2 U.S. MILESTONE  CLOSING.  The obligation of Schering under Section
1.1(b) of this Agreement to purchase the Shares at the U.S. Milestone Closing is
subject to the fulfillment of each of the following conditions:

          (a) REPRESENTATIONS AND WARRANTIES. The representations and warranties
of the  Company  contained  in  Section  2 shall  be true on and as of the  U.S.
Milestone Closing Date with the same effect as though such  representations  and
warranties had been made on and as of the U.S. Milestone Closing Date.

          (b)  PERFORMANCE.  The Company shall have  performed and complied with
all agreements, obligations, and conditions contained in this Agreement that are
required to be performed or complied with by it on or before the U.S.  Milestone
Closing Date.

          (c) QUALIFICATIONS. All authorizations, approvals, or permits, if any,
of any governmental  authority or regulatory body of the United States or of any
state that are required for  consummation  of the  transactions  contemplated by
this Agreement shall have been duly obtained, including, without limitation, the
expiration  or earlier  termination  of any notice and waiting  period under the
Hart-Scott-Rodino  Antitrust  Improvements Act of 1976, as amended, and shall be
effective on and as of the U.S. Milestone Closing Date.

          (d) PROCEEDINGS AND DOCUMENTS.  All corporate and other proceedings in
connection with the transactions  contemplated at the U.S. Milestone Closing and
all documents  incident  thereto shall be  reasonably  satisfactory  in form and
substance to Schering and Schering's  counsel,  and they shall have received all
such  counterpart  original and  certified or other copies of such  documents as
they may reasonably request.

          (e) OPINION OF COMPANY  COUNSEL.  Schering  shall have  received  from
counsel for the Company an opinion addressed to Schering  substantially covering
the matters set forth in Sections  2.1,  2.2, 2.3 (as to the due  authorization,
valid issuance,  full payment and nonassessability of the Shares to be purchased
at the U.S. Milestone Closing), 2.12, 2.13 and 2.14 (as to federal law).

          (f) COMPLIANCE CERTIFICATE. The Chief Executive Officer of the Company
shall deliver to Schering at the U.S. Milestone Closing a certificate certifying
that the conditions specified in Sections 4.2(a), 4.2(b), and 4.2(c) hereof have
been fulfilled and stating that there has been no Material Adverse Change in the
Company since the Initial Closing.

          (g) LICENSE  AGREEMENT  MILESTONE.  The earlier of (i) the  Regulatory
Approval  of the  Product  with  Minimum  Labelling  (as  defined in the License
Agreement) by the United States Food and Drug  Administration,  or (ii) the date
on which,  following any 12 month period, the royalties for that 12 month period
due to the Company on sales in the United States after  Regulatory  Approval (as
defined in the License Agreement) in the United States exceed [REDACTED],  shall
have occurred.

          (h)  APPROVAL.   This  Agreement,   the  License   Agreement  and  the
transactions  contemplated  hereby and thereby  shall have been  approved by the
board of directors of Schering.

<PAGE>
 15

          4.3 EU MILESTONE  CLOSING.  The  obligation of Schering  under Section
1.1(c) of this  Agreement to purchase the Shares at the EU Milestone  Closing is
subject to the fulfillment of each of the following conditions:

          (a) REPRESENTATIONS AND WARRANTIES. The representations and warranties
of the Company contained in Section 2 shall be true on and as of the date of the
EU Milestone  Closing  Date with the same effect as though such  representations
and warranties  had been made on and as of the date of the EU Milestone  Closing
Date.

          (b)  PERFORMANCE.  The Company shall have  performed and complied with
all agreements, obligations, and conditions contained in this Agreement that are
required to be  performed  or complied  with by it on or before the EU Milestone
Closing Date.

          (c) QUALIFICATIONS. All authorizations, approvals, or permits, if any,
of any governmental  authority or regulatory body of the United States or of any
state that are required for  consummation  of the  transactions  contemplated by
this Agreement shall have been duly obtained, including, without limitation, the
expiration  or earlier  termination  of any notice and waiting  period under the
Hart-Scott-Rodino  Antitrust  Improvement Act of 1976, as amended,  and shall be
effective on and as of the EU Milestone Closing Date.

          (d) PROCEEDINGS AND DOCUMENTS.  All corporate and other proceedings in
connection with the  transactions  contemplated at the EU Milestone  Closing and
all documents  incident  thereto shall be  reasonably  satisfactory  in form and
substance to Schering and Schering's  counsel,  and they shall have received all
such  counterpart  original and  certified or other copies of such  documents as
they may reasonably request.

          (e) OPINION OF COMPANY  COUNSEL.  Schering  shall have  received  from
counsel for the Company an opinion addressed to Schering  substantially covering
the matters set forth in Sections  2.1,  2.2, 2.3 (as to the due  authorization,
valid issuance,  full payment and nonassessability of the Shares to be purchased
at the EU Milestone Closing), 2.12, 2.13 and 2.14 (as to federal law).

          (f) COMPLIANCE CERTIFICATE. The Chief Executive Officer of the Company
shall deliver to Schering at the EU Milestone  Closing a certificate  certifying
that the conditions specified in Sections 4.3(a), 4.3(b), and 4.3(c) hereof have
been fulfilled and stating that there has been no Material Adverse Change in the
Company, since the Initial Closing.

          (g)  LICENSE  AGREEMENT  MILESTONE.  The  Regulatory  Approval  of the
Product  in the  European  Union  (including,  as  applicable,  the  CPMP or the
European Agency for the Evaluation of Medicinal Products) with Minimum Labelling
(as defined in the License  Agreement) in at least [REDACTED] of the [REDACTED],
shall have occurred.

          (h)  APPROVAL.   This  Agreement,   the  License   Agreement  and  the
transactions  contemplated  hereby and thereby  shall have been  approved by the
board of directors of Schering.

<PAGE>
 16

          5. CONDITIONS OF THE COMPANY'S OBLIGATIONS AT CLOSING.

          5.1 INITIAL  MILESTONE  CLOSING.  The obligations of the Company under
Section 1.1(a) of this Agreement are subject to the fulfillment on or before the
Initial Milestone Closing of each of the following conditions:

          (a) REPRESENTATIONS AND WARRANTIES. The representations and warranties
of  Schering  contained  in  Section  3 shall  be true on and as of the  Initial
Milestone Closing Date with the same effect as though such  representations  and
warranties had been made on and as of the Initial Milestone Closing Date.

          (b)  PERFORMANCE.  Schering shall have performed and complied with all
agreements,  obligations  and  conditions  contained in this  Agreement that are
required  to be  performed  or  complied  with by it on or  before  the  Initial
Milestone Closing Date.

          (c) QUALIFICATIONS. All authorizations, approvals, or permits, if any,
of any governmental  authority or regulatory body of the United States or of any
state that are required for  consummation  of the  transactions  contemplated by
this Agreement shall have been duly obtained, including, without limitation, the
expiration  or earlier  termination  of any notice and waiting  period under the
Hart-Scott-Rodino  Antitrust  Improvements Act of 1976, as amended, and shall be
effective on and as of the Initial Milestone Closing Date.

          (d) OTHER  AGREEMENTS.  The License Agreement shall have been executed
and delivered by Schering-Plough Ltd.

          (e) OPINION OF SCHERING COUNSEL.  The Company shall have received from
counsel for Schering an opinion  addressed  to the Company  covering the matters
set forth in Sections 3.1(a), (b), (c) and (d).


<PAGE>
 17


          (f)  COMPLIANCE  CERTIFICATE.  An officer of Schering shall deliver to
the  Company  at the  Closing  a  certificate  certifying  that  the  conditions
specified in Sections 5.1(a), 5.1(b), and 5.1(c) hereof have been fulfilled.

          (g)  APPROVAL.   This  Agreement,   the  License   Agreement  and  the
transactions  contemplated  hereby and thereby  shall have been  approved by the
board of directors of the Company.

          5.2 U.S.  MILESTONE  CLOSING.  The  obligations  of the Company  under
Section 1.1(b) of this Agreement are subject to the fulfillment on or before the
U.S. Milestone Closing of each of the following conditions:

          (a) REPRESENTATIONS AND WARRANTIES. The representations and warranties
of Schering contained in Section 3 shall be true on and as of the U.S. Milestone
Closing Date with the same effect as though such  representations and warranties
had been made on and as of the U.S. Milestone Closing Date.

          (b)  PERFORMANCE.  Schering shall have performed and complied with all
agreements,  obligations  and  conditions  contained in this  Agreement that are
required to be performed or complied with by it on or before the U.S.  Milestone
Closing Date.

          (c) QUALIFICATIONS. ALL AUTHORIZATIONS, APPROVALS, OR PERMITS, IF ANY,
OF ANY GOVERNMENTAL  AUTHORITY OR REGULATORY BODY OF THE UNITED STATES OR OF ANY
STATE THAT ARE REQUIRED FOR  CONSUMMATION  OF THE  TRANSACTIONS  CONTEMPLATED BY
THIS AGREEMENT,  SHALL HAVE BEEN DULY OBTAINED,  INCLUDING,  WITHOUT LIMITATION,
THE EXPIRATION OR EARLIER TERMINATION OF ANY NOTICE AND WAITING PERIOD UNDER THE
HART-SCOTT-RODINO  ANTITRUST  IMPROVEMENTS ACT OF 1976, AS AMENDED, AND SHALL BE
EFFECTIVE ON AND AS OF THE U.S. MILESTONE CLOSING DATE.

          5.3 EU MILESTONE CLOSING. The obligations of the Company under Section
1.1(c) of this  Agreement  are  subject to the  fulfillment  on or before the EU
Milestone Closing of each of the following conditions:

          (a) REPRESENTATIONS AND WARRANTIES. The representations and warranties
of Schering  contained  in Section 3 shall be true on and as of the EU Milestone
Closing Date with the same effect as though such  representations and warranties
had been made on and as of the date of the EU Milestone Closing Date.

<PAGE>
 18

          (b)  PERFORMANCE.  Schering shall have performed and complied with all
agreements,  obligations  and  conditions  contained in this  Agreement that are
required to be  performed  or complied  with by it on or before the EU Milestone
Closing Date.

          (c) QUALIFICATIONS. All authorizations, approvals, or permits, if any,
of any governmental  authority or regulatory body of the United States or of any
state that are required for  consummation  of the  transactions  contemplated by
this Agreement,  shall have been duly obtained,  including,  without limitation,
the expiration or earlier termination of any notice and waiting period under the
Hart-Scott-Rodino  Antitrust  Improvements Act of 1976, as amended, and shall be
effective on and as of the EU Milestone Closing Date.

          6.  REGISTRATION  OF COMMON  STOCK;  COVENANTS OF THE  COMPANY;  OTHER
AGREEMENTS.

          6.1  DEFINITIONS.  Unless the context  otherwise  requires,  the terms
defined  in this  Section 6 shall have the  meanings  herein  specified  for all
purposes of this Agreement,  applicable to both the singular and plural forms of
any of the terms herein defined.

          "BOARD" means the Board of Directors of the Company.

          "HOLDER" of any security means the record or beneficial  owner of such
security or any permitted assignee thereof.

          "PERSON" means any natural person,  corporation,  trust,  association,
company,  partnership,   joint  venture  or  other  entity  or  any  government,
governmental agency, instrumentality or political subdivision.

          The  terms  "REGISTER",  "REGISTERED"  and  "REGISTRATION"  refer to a
registration  effected  by  preparing  and filing a  registration  statement  in
compliance  with  the  1933  Act,  and  the  declaration  for  ordering  of  the
effectiveness of such registration statement.

          "REGISTRABLE  SECURITIES"  means (i) the  shares of Common  Stock sold
pursuant to this Agreement and (ii) any Common Stock issued or issuable  (either
directly or upon the  conversion  of or exercise of any warrant,  right or other
security)  with respect to the Common  Stock  referred to in clause (i) above by
way of a stock  dividend or stock split or in connection  with a combination  of
shares,   reclassification,   recapitalization,   merger  or   consolidation  or
reorganization; provided, however that such shares of Common Stock shall only be
treated as Registrable  Securities if and so long as they have not been (x) sold
to or through a broker or dealer or  underwriter in a public  distribution  or a
public  securities  transaction,  or (y) sold in a  transaction  exempt from the
registration  and prospectus  delivery  requirements of the 1933 Act pursuant to
Rule 144  thereunder  so that all the  transfer  registrations  and  restrictive
legends with respect to such Common Stock are removed upon the  consummation  of
such sale and the Company receives an opinion of counsel for the Company (with a
copy to the seller of such  Common  Stock),  which  shall be in form and content
reasonably  satisfactory to the Company, to the effect that such Common Stock in
the  hands of the  purchaser  is  freely  transferable  without  restriction  or
registration under the 1933 Act in any public or private transaction.

<PAGE>
 19
          6.2 DEMAND REGISTRATION.

          (a) If and  whenever  the  Company  shall  receive  at any time  after
[REDACTED] after the earlier to occur of the Initial Milestone Closing Date, the
U.S.  Milestone  Closing Date or the EU  Milestone  Closing  Date  hereunder,  a
written  request  therefor  from  the  Holders  of at least  30  percent  of the
Registrable Securities then outstanding,  the Company agrees to prepare and file
promptly a  registration  statement  under the 1933 Act  covering  the shares of
Registrable  Securities  which are the subject of such request and agrees to use
its best efforts to cause such  registration  statement  to become  effective as
expeditiously as possible.  Upon the receipt of such request, the Company agrees
to give prompt written notice to all Holders of Registrable Securities that such
registration  is  to  be  effected.  The  Company  agrees  to  include  in  such
registration  statement such shares of  Registrable  Securities for which it has
received a written request to register such shares by the Holders thereof within
twenty (20) days after the receipt by the Holders of the written notice from the
Company.

          (b) The  Company  shall be  obligated  to  prepare,  file and cause to
become  effective  only  [REDACTED]  registration  statements  pursuant  to this
Section 6.2. A registration  required to be effected by the Company  pursuant to
this  Section  6.2  shall not be deemed  to have  been  effected  even  though a
registration  statement with respect thereto has become  effective (i) if, after
it has become effective, such registration is interfered with by any stop order,
injunction,  or other  order  or  requirement  of the SEC or other  governmental
agency or court, for any reason not  attributable to the Holders  initiating the
registration  request hereunder (the "Initiating  Holders") with respect to such
registration  statement,  and has not thereafter become effective or (ii) if the
conditions to closing specified in the underwriting  agreement,  if any, entered
into in connection  with such  registration  are not satisfied or waived,  other
than by reason of a failure on the part of the  Initiating  Holders with respect
to such registration statement.

<PAGE> 
20


          (c) If the Initiating  Holders  intend to distribute  the  Registrable
Securities  covered by their request by means of an underwriting,  they agree to
provide the Company with the name of the managing  underwriter  or  underwriters
(the "Managing  Underwriter")  that the Initiating Holders holding a majority of
the Shares to be  included  in the  registration  propose to employ,  as part of
their  request made  pursuant to this  Section  6.2,  and the Company  agrees to
include such information in its written notice referred to in Section 6.2(a). In
such event, the right of any Holder to registration pursuant to this Section 6.2
shall be conditioned upon such Holder's  participation in such  underwriting and
the  inclusion  of such  Holder's  Registrable  Securities  in the  underwriting
(unless otherwise  mutually agreed by the Holders of a majority of the shares of
Registrable Securities to be included in such registration and such Holder). All
Holders proposing to distribute their securities through such underwriting agree
to enter into  (together  with the Company) an  underwriting  agreement with the
underwriter or  underwriters  elected for such  underwriting,  in the manner set
forth above, provided that such underwriting  agreement is in customary form and
is  reasonably  acceptable  to  the  Holders  of a  majority  of the  shares  of
Registrable Securities to be included in such registration.

          (d) Notwithstanding the foregoing,  if the Managing  Underwriter of an
underwritten  distribution  advises the  Company and the Holders of  Registrable
Securities  participating in such registration in writing that in its good faith
judgment the number of shares of Registrable Securities and the other securities
requested  to be included in such  registration  exceeds the number of shares of
Registrable  Securities  and  the  other  securities  which  can be sold in such
offering,  then (i) the other  securities  so  requested  to be included in such
registration  shall initially be reduced and the number of shares of Registrable
Securities so requested to be included in such registration  shall  subsequently
be reduced,  together to that number of shares which in the good faith  judgment
of the Managing  Underwriter  can be sold in such  offering and (ii) the reduced
number of  Registrable  Securities to be included in the  underwriting  shall be
allocated  pro  rata  among  all  Holders  of  Registrable   Securities.   Those
Registrable Securities which are excluded from the underwriting by reason of the
Managing  Underwriter's  marketing  limitation  shall  not be  included  in such
registration  and shall be withheld from the market by the Holders thereof for a
period  not in excess of 120 days,  which the  Managing  Underwriter  reasonably
determines is necessary to effect the underwritten public offering.

<PAGE>
 21


          (e) Notwithstanding any other provision of this Section 6.2, if within
ten (10)  days  following  receipt  of a request  to file a demand  registration
statement  under this Section 6.2, the Company shall furnish to Schering and the
Holders a  certificate  signed by the Chief  Executive  Officer  of the  Company
stating that in the good faith  judgment of the Board of the Company it would be
seriously  detrimental  to the Company or its  shareholders  for a  registration
statement to be filed in the near future, then the Company's  obligation to file
a registration  statement  under this Section 6.2 shall be deferred for a period
not to exceed three (3) months;  provided,  however,  that the Company shall not
obtain such a deferral to file any registration statement under this Section 6.2
more than once in any 12-month period.

          6.3 "PIGGYBACK" REGISTRATION

          (a) Each  time the  Company  shall  determine  to file a  registration
statement  under the 1933 Act (other  than  pursuant  to Section  6.2 hereof and
other than on Form S-4,  S-8 or a  registration  statement  on Form S-1 covering
solely any employee benefit plan) in connection with the proposed offer and sale
for money of any of its  securities  either for its own  account or on behalf of
any other security  holder,  the Company agrees to give prompt written notice of
its  determination  to all Holders of Registrable  Securities.  Upon the written
request of a Holder of any shares of Registrable  Securities given within twenty
(20) days after the receipt of such written notice from the Company, the Company
agrees to cause all such  Registrable  Securities,  the Holders of which have so
requested  registration  thereof, to be included in such registration  statement
and to use its best  efforts  to cause  such  registration  statement  to become
effective under the 1933 Act, all to the extent  requisite to permit the sale or
other  disposition  by the  prospective  seller or  sellers  of the  Registrable
Securities to be so registered.  In the event that the proposed  registration by
the  Company  is,  in whole or in  part,  an  underwritten  public  offering  of
securities  of the  Company,  any  request  pursuant to this  Section  6.3(a) to
register  Registrable  Securities  may specify  that such  securities  are to be
included in the  underwriting (i) on the same terms and conditions as the shares
of Common Stock, if any, otherwise being sold through  underwriters,  under such
registration,  or (ii) on terms  and  conditions  comparable  to those  normally
applicable to offerings of Common Stock in reasonably  similar  circumstances in
the event that no shares of Common Stock other than  Registrable  Securities are
being sold through underwriters in such registration.

<PAGE>
 22


          (b) If the  registration  of which the Company  gives  written  notice
pursuant to Section 6.3(a) is for an underwritten  public offering,  the Company
agrees to so advise the Holders as a part of its written  notice.  In such event
the right of any Holder to  registration  pursuant to this  Section 6.3 shall be
conditioned  upon  such  Holder's  participation  in such  underwriting  and the
inclusion of such Holder's  Registrable  Securities in the  underwriting  to the
extent provided herein.  All Holders  proposing to distribute their  Registrable
Securities  through such  underwriting  agree to enter into  (together  with the
Company  and the  other  Holders  distributing  their  securities  through  such
underwriting)  an  underwriting  agreement with the  underwriter or underwriters
selected for such underwriting by the Company.

          (c)  Notwithstanding  any other  provision of this Section 6.3, if the
Managing Underwriter of an underwritten distribution advises the Company and the
Holders  of  the  Registrable   Securities  requesting   participation  in  such
registration in writing that in its good faith judgment the number of shares of
Registrable Securities and the other securities requested to be registered under
this  Section  6.3 exceeds the number of shares of  Registrable  Securities  and
other  securities  which can be sold in such  offering,  then (i) the  number of
shares  of  Registrable  Securities  and other  securities  so  requested  to be
included in the offering  shall be reduced to that number of shares which in the
good faith  judgment of the Managing  Underwriter  can be sold in such  offering
(except for shares to be issued by the Company in a public offering, which shall
have priority over the Registrable Securities),  and (ii) such reduced number of
shares  shall be  allocated  among  all  participating  Holders  of  Registrable
Securities  and  holders  of  other  securities  in  proportion,  as  nearly  as
practicable,  to the respective  number of shares of Registrable  Securities and
other securities  requested to be registered held by such Holders at the time of
filing  the  registration  statement.   All  Registrable  Securities  and  other
securities  which are excluded from the  underwriting  by reason of the Managing
Underwriters's  marketing  limitation and all other  Registrable  Securities not
originally   requested  to  be  so  included  shall  not  be  included  in  such
registration  and shall be withheld from the market by the Holders thereof for a
period,  not in excess of 120 days,  which the Managing  Underwriter  reasonably
determines is necessary to effect the underwritten public offering.

<PAGE>
 23

          6.4 REGISTRATION EXPENSES.

          (a) The  Company  shall pay all  expenses  incurred in  effecting  the
registration of Registrable Securities pursuant to Section 6 including,  without
limitation,  all federal and state registration,  qualification and filing fees,
printing expenses, fees and disbursements of counsel for the Company, reasonable
fees and  disbursements of one counsel for the  participating  Holders together,
blue sky fees and expenses, and the expense of any special audits incident to or
required by any such  registration,  but not including  underwriting  discounts,
commissions and expenses.

          (b)  Notwithstanding  the foregoing,  in the event that a registration
pursuant to Section 6.2 is requested by the Initiating  Holders and such request
is withdrawn prior to the filing of a registration  statement by the Company, or
such Holders cause the Company to withdraw a registration statement prior to its
effectiveness,  then  either  (i)  the  Initiating  Holders  and  other  Holders
requesting  inclusion of their shares in such  registration  shall bear pro rata
all  fees,  costs  and  expenses  of the  registration  and  preparation  of the
registration statement or (ii) such requested registration shall be deemed to be
one of the  registrations  the Company is required to effect pursuant to Section
6.2 hereof;  provided however, if at the time of the withdrawal,  the Initiating
Holders and the other  Holders  have learned of a Material  Adverse  Change with
respect to the Company  which was not known to such Holders at the time of their
request, then such Holders shall not be required to pay any of such registration
expenses and shall retain their rights pursuant to Section 6.2.

          6.5 REGISTRATION  PROCEDURES.  If and whenever the Company is required
by the  provisions  of  Section  6 to effect  the  registration  of  Registrable
Securities under the 1933 Act, the Company will, as expeditiously as possible:

          (a)  prepare  and file  with the SEC a  registration  statement  which
includes  the  Registrable  Securities  and use its best  efforts  to cause such
registration  statement to become and remain  effective  until the  distribution
described in the registration statement has been completed;

<PAGE>
 24

          (b) prepare and file with the SEC such  amendments and  supplements to
such registration  statement and the prospectus used in connection  therewith as
may be necessary to keep such  registration  statement  effective  and to comply
with  the  provisions  of the  1933  Act  with  respect  to the  sale  or  other
disposition of Registrable  Securities  covered by such  registration  statement
whenever a Holder shall desire to sell or otherwise dispose of the same;

          (c) furnish to each participating Holder (and to each underwriter,  if
any, of Registrable Securities) such number of copies of a prospectus, including
a preliminary  prospectus,  in conformity with the requirements of the 1933 Act,
and such other  documents,  as such  Holder may  reasonably  request in order to
facilitate the public sale or other disposition of the Registrable Securities;

          (d) use its best  efforts  to  register  or  qualify  the  Registrable
Securities covered by such registration statement under such state securities or
blue sky laws of such jurisdiction as each participating Holder shall reasonably
request and do any and all other acts and things  which may be  necessary  under
such  securities or blue sky laws to enable such Holder to consummate the public
sale or other disposition of the Registrable  Securities in such  jurisdictions,
except  that the  Company  shall not for any  purpose  be  required  to  consent
generally  to  service  of  process  or  qualify  to do  business  as a  foreign
corporation in any jurisdiction wherein it is not so qualified;

          (e)  before  filing  the  registration   statement  or  prospectus  or
amendments  or  supplements   thereto,   furnish  to  counsel  selected  by  the
participating  Holders copies of such documents proposed to be filed which shall
be subject to the reasonable approval of such counsel;

          (f) enter  into and  perform  its  obligations  under an  underwriting
agreement,  in usual and customary form,  with the Managing  Underwriter of such
offer;

          (g) notify  the  participating  Holders at any time when a  prospectus
relating to any Registrable Securities covered by such registration statement is
required to be delivered  under the 1933 Act, of the happening of any event as a
result of which the prospectus included in such registration  statement, as then
in effect,  includes an untrue  statement of a material fact or omits to state a
material fact required to be stated  therein or necessary to make the statements
therein not misleading in light of the circumstances  then existing and promptly
file such  amendments and supplements as may be necessary so that, as thereafter
delivered to such Holders of such Registrable Securities,  such prospectus shall
not include an untrue  statement of a material  fact or omit to state a material
fact required to be stated therein or necessary to make the  statements  therein
not  misleading  in light of the  circumstances  then  existing and use its best
efforts to cause each such amendment and supplement to become effective;

          (h)  furnish at the request of the  participating  Holders on the date
that such  Registrable  Securities are delivered to the underwriters for sale in
connection with a registration pursuant to Section 6 (i) an opinion addressed to
the underwriters,  if any, and to such Holders,  dated such date, of the counsel
representing the Company for purposes of such registration in form and substance
as  is  customarily   given  by  company  counsel  to  the  underwriters  in  an
underwritten public offering, and (ii) a letter dated such date addressed to the
underwriters, if any, and to such Holders, from the independent certified public

<PAGE>
 25


accountants of the Company,  in form  and substance as is  customarily  given by
independent  certified  public  accountants to  underwriters  in an underwritten
public offering; and

          (i) use its best efforts to cause all such  Registrable  Securities to
be listed on the  securities  exchange,  if any, or the NMS, on which the Common
Stock is then listed.

          6.6 FORM S-3 REGISTRATION. In case the Company shall at any time after
[REDACTED] after the earlier to occur of the Initial Milestone Closing Date, the
U.S. Milestone Closing Date or the EU Milestone Closing Date hereunder,  receive
from any Holder or Holders a written request or requests that the Company effect
a  registration  on Form S-3 and any related  qualification  or compliance  with
respect to all or a part of the Registrable  Securities  owned by such Holder or
Holders, the Company shall:

          (a) promptly give written notice of the proposed registration, and any
related qualification or compliance, to all other Holders; and

          (b) as soon as practicable,  file a registration  statement and effect
such  registration  and all such  qualifications  and  compliances  as may be so
requested and as would permit or facilitate the sale and  distribution of all or
such  portion  of  such  Holder's  or  Holders'  Registrable  Securities  as are
specified in such request,  together with all or such portion of the Registrable
Securities  of any other  Holder  or  Holders  joining  in such  request  as are
specified,  in a written  request given within 15 business days after receipt of
such written notice from the Company, provided,  however, that the Company shall
not be obligated to effect any such  registration,  qualification  or compliance
pursuant to this Section 6.6: (i) if Form S-3 is not available for such offering
by the  Holders;  (ii) if the  Holders,  together  with the holders of any other
securities of the Company entitled to inclusion in such registration, propose to
sell  Registrable  Securities and such other securities (if any) at an aggregate
price to the public (net of any underwriters'  discounts or commissions) of less
than Five  Hundred  Thousand  Dollars  ($500,000);  (iii) if the  Company  shall
furnish to the Holders a certificate  signed by the President or Chief Executive
Officer of the Company  stating that in the good faith judgment of the Board, it
would be seriously detrimental to the Company and its stockholders for such Form
S-3  Registration  to be effected at such time, in which event the Company shall
have the right to defer the filing of the Form S-3 Registration  Statement for a
period of not more than 60 days after  receipt  of the  request of the Holder or
Holders under this Section 6.6;  provided,  however,  that the Company shall not
utilize  this right more than once in any 12-month  period;  (iv) if the Company
has,  within the 12-month  period  preceding the date of such  request,  already
effected two  registrations on Form S-3 for the Holders pursuant to this Section
6.6;  or (v) in any  particular  jurisdiction  in  which  the  Company  would be
required to qualify to do business or to execute a general consent to service of
process in effecting such registration, qualification or compliance.

          (c)  Registrations  effected  pursuant  to this  Section  6.6 shall be
counted as demands for purposes of the number of registrations effected pursuant
to Section 6.2.

<PAGE>
 26

          6.7   INDEMNIFICATION.   In  the  event  Registrable   Securities  are
registered pursuant to this Section 6:

          (a) To the extent  permitted by law, the Company  will  indemnify  and
hold  harmless  each Holder of  Registrable  Securities  which are included in a
registration  statement  pursuant to the  provisions  of this  Agreement and any
underwriter (within the meaning of the 1933 Act) with respect to the Registrable
Securities,  and each  officer,  director,  employee and agent  thereof and each
person,  if any, who otherwise  controls such Holder or underwriter  (within the
meaning of the 1933 Act),  against  any  losses,  claims,  damages,  expenses or
liabilities,  joint or several,  to which they may become subject under the 1933
Act, the  Securities  Exchange Act of 1934, as amended (the  "Exchange  Act") or
other  federal or state law,  or  otherwise,  insofar  as such  losses,  claims,
damages, expenses or liabilities (or actions in respect thereof) arise out of or
are based upon any untrue or allegedly  untrue  statement  of any material  fact
contained  in  the  registration  statement  for  the  Registrable   Securities,
including any preliminary  prospectus or final prospectus  contained  therein or
any  amendments  or  supplements  thereto,  or  any  document  incident  to  the
registration or qualification of any Registrable Securities,  or arise out of or
are based upon the omission or alleged omission to state therein a material fact
required to be stated  therein or  allegedly  necessary  to make the  statements
therein not misleading or arise out of any violation or alleged violation by the
Company of the 1933 Act, the Exchange Act, any state  securities law or any rule
or  regulation  promulgated  under the 1933 Act,  the  Exchange Act or any state
securities  law; and will  reimburse  such  Holder,  any  underwriter,  officer,
director,  employee, agent or controlling person for any legal or other expenses
reasonably  incurred by them in connection with  investigating  or defending any
such loss,  claim,  damage,  liability or action;  provided,  however,  that the
indemnity  agreement contained in this Section 6.7(a) shall not apply to amounts
paid in settlement of any such loss, claim, damage, expense, liability or action
if such settlement is effected without the written consent of the Company, which
shall not be unreasonably  withheld,  nor shall the Company be liable under this
Section 6.7(a) to such Holder, such underwriter,  officer,  director,  employee,
agent or controlling person for any such loss, claim, damage, expense, liability
or  action to the  extent  that it arises  out of, or is based  upon,  an untrue
statement or allegedly  untrue statement or omission or alleged omission made in
connection  with such  registration  statement,  preliminary  prospectus,  final
prospectus,  or  amendments  or  supplements  thereto,  in reliance  upon and in
conformity with information furnished in writing expressly for use in connection
with such  registration by such Holder,  such  underwriter,  officer,  director,
employee, agent or such controlling person.

<PAGE>
27

          (b) To the  extent  permitted  by  law,  each  Holder  of  Registrable
Securities  which are  included  in a  registration  statement  pursuant  to the
provisions of this Agreement will indemnify and hold harmless the Company,  each
of its  employees,  agents,  directors  and officers,  each person,  if any, who
otherwise  controls  the Company  (within the meaning of the 1933 Act),  and any
underwriter  (within  the meaning of the 1933 Act)  against any losses,  claims,
damages,  expenses  or  liabilities  to which the  Company or any such person or
underwriter  may become  subject  under the 1933 Act,  the Exchange Act or other
federal or state law or  otherwise,  insofar as such  losses,  claims,  damages,
expenses or  liabilities  (or actions in respect  thereof)  arise out of, or are
based  upon any  untrue or  allegedly  untrue  statement  of any  material  fact
contained in a registration statement for the Registrable Securities,  including
any  preliminary  prospectus  or  final  prospectus  contained  therein  or  any
amendments or supplements  thereto, or any document incident to the registration
or  qualification  of any Registrable  Securities,  or arise out of or are based
upon the omission or alleged  omission to state therein a material fact required
to be stated therein or allegedly necessary to make the statements therein not
misleading;  in each case to the extent that such untrue  statement or allegedly
untrue statement or omission or alleged  omission was made in such  registration
statement,  preliminary  prospectus,  or amendments or supplements  thereto,  in
reliance upon and in conformity  with  information  furnished in writing by such
Holder  expressly  for  use in  connection  with  such  registration;  provided,
however, that the indemnity agreement contained in this Section 6.7(b) shall not
apply to amounts paid in settlement of any such loss,  claim,  damage,  expense,
liability or action if such  settlement is effected  without the written consent
of such Holder, which shall not be unreasonably  withheld;  and such Holder will
reimburse the Company or any such person or  underwriter  for any legal or other
expenses reasonably incurred by the Company or any such person or underwriter in
connection with investigating or defending such loss, claim, damage,  liability,
expense or action.

<PAGE> 
28

          (c) Promptly after receipt by an indemnified  party under this Section
6.7 of notice of the commencement of any action, such indemnified party will, if
a claim in respect  thereof is to be made against any  indemnifying  party under
this Section 6.7, notify the  indemnifying  party in writing of the commencement
thereof and generally  summarize such action.  The indemnifying party shall have
the right to  participate  in and to assume the  defense  thereof  with  counsel
mutually  satisfactory to the parties.  An indemnifying party shall not have the
right to direct the defense of such an action on behalf of an indemnified  party
if such  indemnified  party has reasonably  concluded that there may be defenses
available to it that are different from or additional to those  available to the
indemnifying  party;  provided,  however,  that in such event,  the indemnifying
party shall bear the fees and expenses of only one (1) separate  counsel for all
indemnified parties. The failure to notify an indemnifying party promptly of the
commencement  of any such  action if  prejudicial  to the ability to defend such
action,   shall  relieve  such  indemnifying  party  of  any  liability  to  the
indemnified  party under this  Section  6.7,  but the  omission so to notify the
indemnifying  party will not relieve such party of any liability that such party
may have to any indemnified party otherwise than under this Section 6.7.

          (d) To the extent permitted by law, the  indemnification  provided for
under this  Section 6.7 will remain in full force and effect  regardless  of any
investigation  made by or on behalf  of the  indemnified  party or any  officer,
director  or  controlling  person  (within  the meaning of the 1933 Act) of such
indemnified party and will survive the transfer of any securities.

          (e) If for any reason the foregoing indemnity is unavailable to, or is
insufficient to hold harmless an indemnified  party, then the indemnifying party
shall  contribute  to the amount paid or payable by the  indemnified  party as a
result of such losses,  claims,  damages,  expenses or  liabilities  (i) in such
proportion as is  appropriate to reflect the relative  benefits  received by the
indemnifying  party on the one hand and the  indemnified  party on the  other or
(ii) if the  allocation  provided  by  clause  (i)  above  is not  permitted  by
applicable  law,  or  provides  a lesser sum to the  indemnified  party than the
amount  representing  such  proportion as is appropriate to reflect not only the
relative  benefits  received by the  indemnifying  party on the one hand and the
indemnified  party on the other but also the relative fault of the  indemnifying
party  and  the  indemnified  party  as  well as any  other  relevant  equitable
considerations.  Notwithstanding the foregoing, no underwriter, if any, shall be
required  to  contribute  any  amount in excess of the amount by which the total
price at which the securities  underwritten  by it and distributed to the public
were offered to the public  exceeds the amount of any damages which  underwriter
has otherwise been required to pay by reason of such untrue or alleged untrue

<PAGE>
 29


statement  or  omission  or alleged  omission.  No person  guilty of  fraudulent
misrepresentation (within the meaning of Section 11(f) of the 1933 Act) shall be
entitled to  contribution  from any person who was not guilty of such fraudulent
misrepresentation.  The obligation of any underwriters to contribute pursuant to
this  Section  6.7(e)  shall  be  several  in  proportion  to  their  respective
underwriting commitments and not joint.

          6.8 REPORTS UNDER EXCHANGE ACT. With a view to making available to the
Holders the  benefits of Rule 144  promulgated  under the 1933 Act and any other
rule or  regulation  of the SEC  that may at any  time  permit a Holder  to sell
Registrable  Securities to the public without  registration,  and with a view to
making it possible  for any such Holder to register the  Registrable  Securities
pursuant to a registration on Form S-3, the Company agrees to:

          (a) make and keep public information  available at all times, as those
terms are understood and defined in Rule 144;

          (b) take such  action as is  necessary  to enable a Holder to  utilize
Form S-3 for the sale of Registrable Securities;

          (c)  file  with the SEC in a  timely  manner  all  reports  and  other
documents required of the Company under the 1933 Act and the Exchange Act; and

          (d) furnish to a Holder owning any Registrable Securities upon request
(i) a written  statement by the Company that it has complied  with the reporting
requirements  of  Rule  144,  the  1933  Act and the  Exchange  Act,  or that it
qualifies as a registrant whose Registrable Securities may be resold pursuant to
Form S-3 (at any time  after it so  qualifies),  (ii) a copy of the most  recent
annual or quarterly  report of the Company and such other  reports and documents
so filed by the Company,  and (iii) such other  information as may be reasonably
required  in  availing  any  Holder  of  Registrable  Securities  of any rule or
regulation  of the  SEC  which  permits  the  selling  of any  such  Registrable
Securities without registration or pursuant to such form.

<PAGE>
 30

          6.9  TRANSFERABILITY.  The  right to cause  the  Company  to  register
Registrable  Securities  granted  by the  Company  to  the  Holders  under  this
Agreement  may be  assigned  by any Holder to a  transferee  or  assignee of any
Registrable  Securities,  provided that the Company must receive  written notice
prior to or at the time of said  transfer,  stating the name and address of said
transferee or assignee and identifying the securities with respect to which such
rights are being  assigned.  The  limitations  set forth in this  Section 6 with
respect to  registration  rights shall apply to all  transferees or assignees of
Registrable Securities.

          6.10  CROSS-DEFAULT.  The  termination,  expiration  or failure of the
License Agreement to become effective for any reason other than a breach thereof
by Schering-Plough  Ltd. or any of its affiliates shall terminate this Agreement
as of the date of such termination (or, if Schering-Plough  Ltd.  terminates the
License  Agreement without cause, as of the date  Schering-Plough  Ltd. provides
Company with notice of such termination). In the event of the termination of the
License  Agreement  by the Company upon the breach  thereof by  Schering-Plough,
Ltd., then such breach shall be deemed to be a material breach of this Agreement
and this Agreement shall also terminate.  Any such termination  shall be without
prejudice to any other rights the Company may have.  The  Company's  obligations
and the rights of Schering and other  Holders of  Registrable  Securities  under
this Article 6 shall survive any  termination  of this Agreement with respect to
Registrable  Securities  owned by Schering  and other  Holders as of the date of
such termination.

          6.11  LIMITATION OF LIABILITY.  With respect to any claim by one party
against the other arising out of the  performance  or failure of  performance of
the other  party under this  Agreement,  the  parties  expressly  agree that the
liability  of such  party to the other  party for such  breach  shall be limited
under this Agreement or otherwise at law or equity to direct damages only and in
no event  shall a party be liable  for,  punitive,  exemplary  or  consequential
damages.

          7. MISCELLANEOUS.

          7.1  SURVIVAL  OF   WARRANTIES.   The   warranties,   representations,
agreements,  covenants and undertakings of the Company or Schering  contained in
or made pursuant to this  Agreement  shall survive the execution and delivery of
this Agreement and the Initial Closing,  the U.S.  Milestone  Closing and the EU
Milestone  Closing,  as the case may be, and shall in no way be  affected  by an
investigation  of the subject matter thereof made by or on behalf of Schering or
the Company.

<PAGE>
 31

          7.2  INCORPORATION  BY  REFERENCE.  All  schedules  appended  to  this
Agreement are herein incorporated by reference and made a part hereof.

          7.3   PARTIES  IN   INTEREST.   All  terms,   covenants,   agreements,
representations,  warranties and  undertakings  in this Agreement made by and on
behalf of any of the parties  hereto  shall bind and inure to the benefit of the
respective  successors and assigns of the parties hereto (including  transferees
of any Shares), subject to Section 6.9 hereof.

          7.4 AMENDMENTS AND WAIVERS.  Changes in or additions to this Agreement
may be made or  compliance  with any term,  covenant,  agreement,  condition  or
provision  set forth  herein may be omitted  or  waived,  only upon the  written
consent of the Company and Schering.

<PAGE>
 32


          7.5  GOVERNING  LAW.  This  Agreement  shall be deemed a contract made
under the laws of the  State of New  Jersey  and,  together  with the  rights or
obligations of the parties  hereunder,  shall be construed under and governed by
the laws of such State.

          7.6 NOTICES. All notices,  requests,  consents and demands shall be in
writing and shall be deemed given when (i) personally delivered,  (ii) mailed in
a registered  or certified  envelope,  postage  prepaid or (iii) sent by Federal
Express or another  nationally  recognized  overnight  delivery service (paid by
sender):

to the Company at:

                             ICN Pharmaceuticals, Inc.
                             ICN Plaza
                             330 Hyland Avenue
                             Costa Mesa, CA 92626
                             Attention:  President
                             Facsimile Number: (714) 641-7276

or to Schering at:

                             Schering-Plough Corporation
                             2000 Galloping Hill Road
                             Kenilworth, NJ 07033
                             Attention:  President
                             Facsimile Number: (908) 298-5379

          or such other address as may be furnished in writing by a party to the
other party hereto.

          7.7 COUNTERPARTS.  This Agreement may be executed in counterparts, all
of which together shall constitute one and the same instrument.

          7.8 EFFECT OF HEADINGS.  The section and paragraph headings herein are
for convenience only and shall not affect the construction hereof.

          7.9 ENTIRE  AGREEMENT.  This Agreement,  the Supply  Agreement and the
schedules hereto and thereto constitute the entire agreement between the Company
and  Schering  with  respect  to  the  subject  matter  hereof.   There  are  no
representations,  warranties,  covenants  or  undertakings  with  respect to the
subject  matter  hereof  other  than  those  expressly  set forth  herein.  This
Agreement  supersedes all prior  agreements  between the parties with respect to
the Shares purchased hereunder and the subject matter hereof.

          7.10 PUBLICITY. No party shall originate any publicity,  news release,
or other  announcement,  written  or oral,  relating  to this  Agreement,  or to
performance  hereunder or the  existence of an  arrangement  between the parties
hereto without the prior written approval of the other. Nothing contained herein
shall  prevent  any party from at any time  furnishing  any  information  to any
governmental  authority  which it is by law so  obligated  to  disclose  or from
making any disclosure which its counsel deems necessary or advisable in order to
fulfill such party's disclosure obligations under applicable law or the rules of
the New York Stock Exchange.


<PAGE>
 33

          7.11 SEVERABILITY. The invalidity or unenforceability of any provision
hereof  shall in no way  affect  the  validity  or  enforceability  of any other
provision.




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


                           ICN PHARMACEUTICALS, INC.


                           By: /s/ DAVID C. WATT
                               ---------------------------
                               Name:  David C. Watt
                               Title: Executive Vice President,
                                      General Counsel and Corporate Secretary


                           SCHERING-PLOUGH CORPORATION


                           By: /s/ David Poorvin, Ph.D.
                               ----------------------------
                               Name: David Poorvin, Ph.D.
                               Title: Authorized Signatory





<PAGE>
                                  SCHEDULE 2.13

In the  Company's  Form 10-Q for the period ended March 31, 1995,  under Item 3,
"Legal Proceedings," reference was made to various actions, including securities
class actions (the "Securities Actions") and shareholder derivative actions (the
"Federal  Derivative  Actions")  filed in February  and March 1995 in the United
States District Court for the Central  District of California,  alleging,  INTER
ALIA,  that the Company  and  certain of its  officers  and  directors  had made
various  deceptive  and untrue  statements of material fact and omitted to state
material facts in connection with information it received from the U.S. Food and
Drug Administration ("FDA") regarding the Company's New Drug Application ("NDA")
for the use of  Virazole(R)  for  the  treatment  of  chronic  hepatitis  C (the
"Hepatitis  C NDA"),  and that  certain  officers of the  Company had  allegedly
engaged in illegal insider trading.

By order  dated May 2,  1995,  the  Securities  Actions  were  consolidated  and
directed to be coordinated with the related Federal Derivative Actions. PURSUANT
TO THE  TIME  SCHEDULES  SET  FORTH IN THE MAY 2  ORDER,  ON JUNE 15 AN  AMENDED
CONSOLIDATED  COMPLAINT  WAS SERVED IN THE  SECURITIES  ACTIONS,  AND AN AMENDED
CONSOLIDATED COMPLAINT WAS SERVED IN THE FEDERAL DERIVATIVE ACTIONS. PURSUANT TO
THE  ORDER,  DEFENDANTS  HAVE  UNTIL  AUGUST 1 TO ANSWER  OR MOVE  WITH  RESPECT
THERETO.

In May 1995, an additional securities class action was filed against the Company
and its chairman in the Central  District of  California  alleging  that,  INTER
ALIA, the proxy materials and prospectus  prepared in connection with the merger
of ICN  Pharmaceuticals,  Inc. ("Old ICN"), SPI  Pharmaceuticals,  Inc. ("SPI"),
Viratek, Inc. and ICN Biomedicals, Inc. ("Biomedicals"),  effective November 10,
1994 ("the Merger"),  contained false and misleading  information  regarding the
potential approval by the FDA of Virazole(R) for the Hepatitis C indication, and
that  defendants had therefore  established an excessive value for the shares of
Viratek in setting the exchange ratios for the four companies in connection with
the Merger. Plaintiff further alleges that the Company's chairman had engaged in
illegal insider trading of the Company's  common stock. On behalf of a purported
class of individuals  who exchanged  their shares of Old ICN, SPI or Biomedicals
for newly issued shares of New ICN,  plaintiff seeks damages and related relief.
Counsel for  defendants  has agreed with counsel for the  plaintiffs  to adjourn
defendants' time to answer or move with respect to the complaint until August 1,
1995.  This action was  consolidated  with the  Securities  Actions as described
above.

Pursuant to an Order Directing Private Investigation Officers to Take Testimony,
entitled IN THE MATTER OF ICN  PHARMACEUTICALS,  INC., (P-177) (the "Order"),  a
private  investigation  is being  conducted  by the SEC with  respect to certain
matters  pertaining to the status and  disposition of the Company's  Hepatitis C
NDA. As set forth in the Order, the investigation  concerns whether,  during the
period  June 1994,  through  February  1995,  the  Company,  persons or entities
associated  with it and others,  in the offer and sale or in connection with the
purchase and sale of ICN common stock, engaged in possible violations of Section
17(a) of the  Securities  Act of 1933 and Section  10(b) of the  Securities  and
Exchange  Act of 1934 and Rule 10b-5  thereunder,  by having  possibly  (i) made
false or misleading  statements or omitted to state  material facts with respect
to the status and  disposition of the Hepatitis C NDA, or (ii) purchased or sold
ICN  common  stock  while in  possession  of  material,  non-public  information
concerning  the status and  disposition of the Hepatitis C NDA or (iii) conveyed
material,  non-public  information  concerning the status and disposition of the
Hepatitis C NDA to other persons who may have  purchased or sold ICN stock.  The
Company is cooperating with the SEC in its investigation.


<PAGE>




                                    Exhibit D


                                   [REDACTED]



<PAGE> 

                                    Exhibit E

                       Adverse Event Reporting Procedures


The Parties  hereby agree that the following  terms will govern  disclosures  of
each Party to the other with respect to adverse event reporting  relating to the
Product as clinically tested or marketed by or on behalf of either Party.

         1.       An Adverse Event ("AE) is defined as:

                  (a) any  experience  which  is  adverse,  including  what  are
commonly  described  as  adverse or  undesirable  experiences,  adverse  events,
adverse  reactions,  side effects,  or death due to any cause associated with or
observed in conjunction with the use of a drug, biological product, or devise in
humans, whether or not considered related to the use of that product:

          * occurring in the course of the use of the drug,  biological  product
               or device,

          * associated with, or observed in conjunction  with product  overdose,
               whether accidental or intentional,

          * associated  with,  or observed in  conjunction  with product  abuse,
               and/or

          * associated with, or observed in conjunction with product withdrawal.

          (b) Any significant  failure of expected  pharmacological  or biologic
therapeutical action (with the exception of in clinical trials).

         2.       Serious or Non-Serious is defined as:

                  (a) A  Serious  AE is one that is life  threatening  or fatal,
permanently  disabling,  requires  or  prolongs  in-patient  hospitalization  or
prolonged  hospitalization,  or is a congenital anomaly,  cancer or overdose. In
addition,  end organ toxicity,  including  hematological,  renal,  hepatic,  and
central nervous system AE's, may be considered  serious.  In laboratory tests in
animals,  a serious AE includes any experience  suggesting  significant risk for
human subjects.

          (b) A Non-Serious  AE is any AE which does not meet the criteria for a
serious AE.

          3. Life-threatening is defined as: the patient is at immediate risk of
death from the AE as it occurs.

          4. End-Organ Toxicity is defined as: A medically  significant event or
lab value  change in which a patient  may not  necessarily  be  hospitalized  or
disabled, but is clinically significant enough to warrant monitoring (e.g.
seizures, blood dyscrasias).

         5.       Expected or unexpected to defined as:

                  (a) Expected AE - An AE which is listed in the  Investigator's
Brochure for clinical  trials,  included in local  labelling  (e.g.,  Summary of
Product  Characteristics)  for Marketed  Drugs,  or in  countries  with no local
labelling, in the Corporate Standard Prescribed Document.


<PAGE>

                  (b)  Unexpected AE - An AE that does not meet the criteria for
an expected AE or an AE which is listed but differs  from that event in terms of
severity or specificity.

          6.  Associated with or related to the use of the drug is defined as: A
reasonable possibility exists that the AE was caused by the drug.

          7.  Un-associated or unrelated to the use of the drug is defined as: A
reasonable possibility exists that the AE may not have been caused by the drug.

         8. NDA Holder is defined as: An  "Applicant"  as defined in 21 CFR Part
314.3(b),  for regulatory approval of a Product in any regulatory  jurisdiction,
including a holder of a foreign equivalent thereto.

          9. NDA Holder is  defined  as: A  "Sponsor"  as defined in 21 CFR Part
312.3(b)  of  an  investigational  new  drug  in  any  regulatory  jurisdiction,
including a holder of a foreign equivalent thereto.

         10.  Capitalized  terms not  defined  in this  Exhibit  shall  have the
meaning  assigned  thereto in the Exclusive  License and Supply  Agreement  (the
"Agreement").

         11.      With respect to the Product, the Parties agree as follows:

                  All initial  reports and any  follow-up  information  (oral or
                  written) for any and all Serious AEs as defined above,  (other
                  than with  respect to animal  studies)  which  become known to
                  either Party (other than from  disclosure)  by or on behalf of
                  the other Party must be communicated by telephone, telefax, or
                  electronically  directly  to the other  Party  and/or  the NDA
                  Holder, IND Holder (individually and collectively  referred to
                  as  "Holders")  within  forty-eight  hours of  receipt  of the
                  information.  Written  confirmation of the Serious AE received
                  by such  Party  should be sent to the other  Party  and/or the
                  Holders  as soon as it  becomes  available,  but in any  event
                  within  forty eight hours of initial  report of the Serious AE
                  by such Party.

                  Both Parties shall  exchange  Medwatch  and/or CIOMS forms and
                  other  health  authority  reports  within forty eight hours of
                  submission to any regulatory agency.

                  All initial reports and follow-up information received for all
                  Non-Serious  AEs for marketed  Product which become known to a
                  Party (other than from disclosure by or on behalf of the other
                  Party)  must  be  communicated  in  writing,   by  telefax  or
                  electronically to the other Party on a monthly basis.
<PAGE>






                                    Exhibit F

                             Publication Procedures








© 2022 IncJournal is not affiliated with or endorsed by the U.S. Securities and Exchange Commission