<ARTICLE> 5 <LEGEND> This schedule contains financial data extracted from Schering-Plough Corporation and Subsidiaries consolidated financial statements for the six months ended June 30, 1999, and is qualified in its entirety by reference to such financial statements. </LEGEND> <MULTIPLIER> 1,000,000 <PERIOD-TYPE> 6-MOS <FISCAL-YEAR-END> DEC-31-1999 <PERIOD-END> JUN-30-1999 <CASH> 1523 <SECURITIES> 0 <RECEIVABLES> 1018 <ALLOWANCES> 0 <INVENTORY> 861 <CURRENT-ASSETS> 4460 <PP&E> 4153 <DEPRECIATION> 1412 <TOTAL-ASSETS> 8619 <CURRENT-LIABILITIES> 3211 <BONDS> 0 <PREFERRED-MANDATORY> 0 <PREFERRED> 0 <COMMON> 1015 <OTHER-SE> 3383 <TOTAL-LIABILITY-AND-EQUITY> 8619 <SALES> 4637 <TOTAL-REVENUES> 4637 <CGS> 904 <TOTAL-COSTS> 904 <OTHER-EXPENSES> 559 <LOSS-PROVISION> 0 <INTEREST-EXPENSE> 0 <INCOME-PRETAX> 1439 <INCOME-TAX> 353 <INCOME-CONTINUING> 1086 <DISCONTINUED> 0 <EXTRAORDINARY> 0 <CHANGES> 0 <NET-INCOME> 1086 <EPS-BASIC> .74 <EPS-DILUTED> .73