<ARTICLE> 5 <LEGEND> This schedule contains summary financial information extracted from Schering-Plough Corporation and subsidiaries consolidated Financial Statements for the nine months ended September 30, 1998, and is qualified in its entirety by reference to such financial statements. </LEGEND> <MULTIPLIER> 1000000 <PERIOD-TYPE> 9-MOS <FISCAL-YEAR-END> DEC-31-1998 <PERIOD-END> SEP-30-1998 <CASH> 937 <SECURITIES> 0 <RECEIVABLES> 680 <ALLOWANCES> 0 <INVENTORY> 804 <CURRENT-ASSETS> 3442 <PP&E> 3924 <DEPRECIATION> 1343 <TOTAL-ASSETS> 7216 <CURRENT-LIABILITIES> 2696 <BONDS> 46 <PREFERRED-MANDATORY> 0 <PREFERRED> 0 <COMMON> 1015 <OTHER-SE> 2679 <TOTAL-LIABILITY-AND-EQUITY> 7216 <SALES> 6018 <TOTAL-REVENUES> 6018 <CGS> 1197 <TOTAL-COSTS> 1197 <OTHER-EXPENSES> 742 <LOSS-PROVISION> 0 <INTEREST-EXPENSE> 0 <INCOME-PRETAX> 1771 <INCOME-TAX> 434 <INCOME-CONTINUING> 1337 <DISCONTINUED> 0 <EXTRAORDINARY> 0 <CHANGES> 0 <NET-INCOME> 1337 <EPS-PRIMARY> 1.82 <EPS-DILUTED> 1.80