<ARTICLE>                     5
<LEGEND>
      THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM PFIZER
      INC. AND SUBSIDIARY COMPANIES CONSOLIDATED BALANCE SHEET AND CONSOLIDATED
      STATEMENT OF INCOME FOR THE PERIOD ENDED DECEMBER 31, 1999 AND IS
      QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<MULTIPLIER> 1,000,000

                                                        
<PERIOD-TYPE>                                           12-MOS
<FISCAL-YEAR-END>                                  DEC-31-1999
<PERIOD-END>                                       DEC-31-1999
<CASH>                                                     739
<SECURITIES>                                             3,703
<RECEIVABLES>                                            3,932
<ALLOWANCES>                                               (68)
<INVENTORY>                                              1,654
<CURRENT-ASSETS>                                        11,191
<PP&E>                                                   8,037
<DEPRECIATION>                                          (2,694)
<TOTAL-ASSETS>                                          20,574
<CURRENT-LIABILITIES>                                    9,185
<BONDS>                                                    525
<PREFERRED-MANDATORY>                                        0
<PREFERRED>                                                  0
<COMMON>                                                   213
<OTHER-SE>                                              18,812
<TOTAL-LIABILITY-AND-EQUITY>                            20,574
<SALES>                                                 14,133
<TOTAL-REVENUES>                                        16,204
<CGS>                                                    2,528
<TOTAL-COSTS>                                            2,528
<OTHER-EXPENSES>                                         2,776
<LOSS-PROVISION>                                            32
<INTEREST-EXPENSE>                                         223
<INCOME-PRETAX>                                          4,448
<INCOME-TAX>                                             1,244
<INCOME-CONTINUING>                                      3,199
<DISCONTINUED>                                             (20)
<EXTRAORDINARY>                                              0
<CHANGES>                                                    0
<NET-INCOME>                                             3,179
<EPS-BASIC>                                                .84
<EPS-DILUTED>                                              .82

<FN>
<F1> Financial data schedules for periods other than the years ended December
31, 1998 and 1997 and the six-month period ended June 28, 1998 have not been
restated to reflect the three-for-one stock split distributed June 30, 1999.
</FN>