SECURITIES AND EXCHANGE COMMISSION

                             Washington, D.C. 20549


                                    FORM 8-K


                                 CURRENT REPORT

                     PURSUANT TO SECTION 13 OR 15(d) OF THE
                         SECURITIES EXCHANGE ACT OF 1934

                         Date of report: April 23, 2003
                 Date of earliest event reported: April 16, 2003



                                   PFIZER INC.
                                   -----------
             (Exact name of registrant as specified in its charter)

           Delaware                1-3619                13-5315170
      (State or other         (Commission File        (I.R.S. Employer
       jurisdiction of           (Number)           Identification No.)
       incorporation)


            235 East 42nd Street                            10017
            New York, New York                           (Zip Code)
                  (Address of principal executive offices)


              Registrant's telephone number, including area code:
                               (212) 573-2323




Item 4. Changes in Registrant's Certifying Accountants

On April 16, 2003, Pfizer Inc. ("Pfizer") completed its merger with Pharmacia
Corporation ("Pharmacia"). As a result of the merger, Pfizer has engaged KPMG
LLP as its independent auditors to audit the financial statements of the
Pharmacia Corporation Savings and Investment Plan ("Plan") for the year ended
December 31, 2002. PricewaterhouseCoopers LLP ("PWC"), independent auditors of
Pharmacia prior to its acquisition by Pfizer, will no longer audit the Plan. The
reports of PWC regarding the Plan's financial statements as of and for the years
ended December 31, 2001 and 2000 did not contain any adverse opinion or
disclaimer of opinion or any qualification or modification as to uncertainty,
audit scope or accounting principles or practices, financial statement
disclosure or auditing scope or procedure which, if not resolved to the
satisfaction of PWC, would have caused it to make reference to the matter in its
reports. PWC has been provided with a copy of this Current Report on Form 8-K
and has been requested to furnish a letter stating whether or not it agrees with
the foregoing statements. Such letter will be filed by amendment to this Form
8-K.

The Plan engaged KPMG LLP as its independent accountants to audit the Plan's
financial statements for the year ended December 31, 2002. During the years
ended December 31, 2001 and 2000 and through the filing date of this Current
Report on Form 8-K, the Plan did not consult with KPMG LLP on any accounting or
auditing matter.





                                   SIGNATURE

Under the requirements of the Securities Exchange Act of 1934, the registrant
has caused this report to be signed on its behalf by the authorized undersigned.

                            PFIZER INC.


                            By:/s/Margaret M.Foran
                               ----------------------------
                               Margaret M. Foran
                               Title: Vice President-Corporate
                               Governance and Secretary



Dated: April 23, 2003