Exhibit 32.2

CERTIFICATION

I, Robert J. Bertolini, Executive Vice President and Chief Financial Officer of
Schering-Plough Corporation, certify, pursuant to Section 906 of the
Sarbanes-Oxley Act of 2002, that:

(1)   the Quarterly Report on Form 10-Q for the quarterly period ended September
      30, 2004 (the "Periodic Report") which this statement accompanies fully
      complies with the requirements of Section 13(a) of the Securities Exchange
      Act of 1934 (15 U.S.C. 78m); and

(2)   information contained in the Periodic Report fairly presents, in all
      material respects, the financial condition and results of operations of
      Schering-Plough Corporation.

Dated: October 28, 2004

/s/ Robert J. Bertolini
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    Robert J. Bertolini
Executive Vice President and
Chief Financial Officer