[EXHIBIT 99.5.2]


                                 AMENDMENT


      AMENDMENT, dated as of April 22, 1998 (this "Amendment"), to the
 International License Agreement, effective as of June 28, 1996 (the
 "Agreement") by and between Warner-Lambert Company, a Delaware corporation
 ("Warner-Lambert"), and Pfizer Inc., a Delaware corporation ("Pfizer").
 Capitalized terms not otherwise defined herein have the meanings set forth
 in the Agreement.

      WHEREAS, Warner-Lambert has assigned certain of its rights and
 obligations under the Agreement to Warner-Lambert Export Limited, a
 company organized and existing under the laws of Ireland ("Export"), in
 accordance with the Assignment and Assumption Agreement dated as of
 November 1, 1996; and

      WHEREAS, Pfizer has assigned certain of its rights and obligations
 under the Agreement to Pfizer Overseas Inc., a corporation organized and
 existing under the laws of Delaware ("Pfizer Overseas"); and

      WHEREAS, upon this Amendment becoming effective, the parties have
 agreed that certain provisions of the Agreement be amended in the manner
 provided for in this Amendment;

      NOW, THEREFORE, the parties hereto hereby agree as follows:

                           ARTICLE I - AMENDMENTS

      SECTION 1.01. Amendment of Exhibit A. Exhibit A of the Agreement is
 hereby amended by inserting the country "Morocco" below the country
 "Iceland" and above the country "Norway" under Category 1.

                       ARTICLE II - ADDITIONAL AGREEMENTS

      SECTION 2.01. Sales Minimums.

            (a) Solely in Morocco, Pfizer Overseas agrees that aggregate
      Net Sales in Morocco shall equal at least U.S.$71,429, U.S.$857,143
      and U.S.$1,787,714, respectively, for each of the first three
      Agreement Years for Morocco. In the event Pfizer Overseas or its
      Affiliates does not achieve such sales minima during any of the first
      three Agreement Years, Pfizer Overseas shall pay to Export, within 60
      days after the end of such Agreement Year, an amount calculated as
      follows: the difference between 14% of Net Sales for the Agreement
      Year in which the shortfall occurred and (i) U.S.$10,000 in Agreement
      Year One, (ii) U.S.$120,000 in Agreement Year Two, and (iii)
      U.S.$250,000 in Agreement Year Three.

            (b) For example, if Pfizer Overseas achieved Net Sales equal to
      U.S.$60,000 in Agreement Year One, Pfizer Overseas would owe Export
      an amount equal to $1,600 (i.e., $10,000 minus ($60,000 X 14%)).

      SECTION 2.02. Termination of Exclusive License Rights.

            (a) If Pfizer Overseas or its Affiliates, as the case may be,
      does not achieve Net Sales in Morocco equal to at least
      U.S.$2,000,000 during the period beginning 24 months and ending 36
      months after the Launch Date for Morocco, and if applicable Laws or
      Governmental or Regulatory Authority, as the case may be, do not
      allow the transfer of the Manufacturing Authorization from Pfizer
      Overseas to Export, or its Affiliate, at such time, Export may elect,
      in its sole discretion, (i) to continue unchanged its relationship
      with Pfizer Overseas for Morocco as provided in this Amendment and
      any other applicable agreements or (ii) renegotiate such relationship
      as further provided in this Section 2.02(a). In the event that Export
      shall elect to renegotiate such relationship as provided in the
      foregoing clause (ii), Export or its Affiliates shall have the right
      to promote and detail the Product in Morocco on such commercially
      reasonable terms and conditions (including as to exclusivity) as
      shall be negotiated between the parties in good faith; provided that
      under any such renegotiated relationship, Pfizer Overseas or its
      Affiliates shall have the right to continue its current manufacturing
      and/or packaging, distribution and sale of the Product in Morocco.

            (b) If Pfizer Overseas or its Affiliates, as the case may be,
      does not achieve Net Sales in Morocco equal to at least
      U.S.$2,000,000 during the period beginning 24 months and ending 36
      months after the Launch Date for Morocco, and if applicable Laws or
      Governmental or Regulatory Authority, as the case may be, allow the
      transfer of the Manufacturing Authorization from Pfizer Overseas to
      Export, or its Affiliate, at such time, Export may elect, in its sole
      discretion, (i) to terminate the exclusive license granted to Pfizer
      Overseas in Morocco and retain all rights to promote, detail and
      distribute the Product exclusively in Morocco; or (ii) to agree with
      Pfizer to promote and detail the Product in Morocco in accordance
      with the International Co-Promotion Agreement dated as of June 28,
      1996, as amended. In the event Pfizer elects not to continue such
      manufacturing and/or packaging and distribution activities, as the
      case may be, Pfizer agrees to use its best efforts to transfer
      promptly the Manufacturing Authorization to such party designated by
      Export, in its sole discretion, so as to not materially disrupt
      Export's or its designee's ability to distribute the Product in
      Morocco.

            (c) Export's rights under this Section 2.02 shall be in
      addition to, and shall not be in limitation of, its rights under
      Section 2.01.

            (d) The parties shall agree to execute any other documents or
      undertake any further actions as may be reasonably necessary to
      effectuate the provisions of this Section 2.01.

      SECTION 2.03.  Methods of Calculation.

            (a) For purposes of calculating Net Sales in Morocco under
      Section 2.01 and 2.02 above, the parties agree as follows:

            (i)  the currency exchange rate shall be 9.36 Dirhams per
                 U.S.$1.00; and

            (ii) the manufacturer selling price for the Product is equal to
                 8.90 Dirhams per 10 mg. tablet.

            (b) In the event that the actual (1) currency exchange rate in
      Morocco or (2) the manufacturer selling price of the 10 mg. tablet of
      the Finished Product shall be greater than or less than by more than
      15% the rate or price, as the case may be, set forth in Section
      2.03(a) above, the parties agree to appropriately renegotiate, in
      good faith, the sales minima set forth in Sections 2.01 and 2.02
      above.

                         ARTICLE III - MISCELLANEOUS

      SECTION 3.01. No Other Amendments; Confirmation. Except as expressly
 amended, waived, modified and supplemented hereby, the provisions of the
 Agreement are and shall remain in full force and effect.

      SECTION 3.02. Governing Law. This Amendment shall be governed by and
 construed in accordance with the law of the State of New York other than
 those provisions governing conflicts of law.

      SECTION 3.03. Headings. The headings used in this Amendment have been
 inserted for convenience of reference only and do not define or limit the
 provisions hereof.

      SECTION 3.04. Third Party Beneficiaries. None of the provisions of
 this Amendment shall be for the benefit of or enforceable by any third
 party, including, without limitation, any creditor of either party hereto.
 No such third party shall obtain any right under any provision of this
 Amendment or shall by reason of any such provision make any claim in
 respect of any debt, liability or obligation (or otherwise) against either
 party hereto.

      IN WITNESS WHEREOF, the parties hereto, by their duly authorized
 officers, have executed this Amendment as of the date first written above.


 WARNER-LAMBERT                         PFIZER OVERSEAS INC.
 EXPORT LIMITED


 By: /s/ Paul V. Breen                  By: /s/ Mohand Sidi Said
    ----------------------------           ----------------------------
    Name:  Paul V. Breen                   Name:  Mohand Sidi Said
    Title: Managing Director               Title: Vice President