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 period ended June 30, 2005 (the
      "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 Report fairly presents, in all material
      respects, the financial condition and results of operations of
      Schering-Plough Corporation.

Dated: July 27, 2005

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

                                       59