EXHIBIT 32.1

CERTIFICATION OF EXECUTIVE VICE PRESIDENT





                            CERTIFICATION PURSUANT TO
                             18 U.S.C. SECTION 1350
                             AS ADOPTED PURSUANT TO
                  SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Quarterly Report of Pharmaceutical  Resources,  Inc. (the
"Company")  on Form 10-Q for the period  ended  June 29,  2003 as filed with the
Securities and Exchange  Commission on the date hereof (the "Report"),  I, Scott
L. Tarriff,  Executive  Vice President of the Company,  certify,  pursuant to 18
U.S.C.  Section 1350, as adopted  pursuant to Section 906 of the  Sarbanes-Oxley
Act of 2002, that, to my knowledge:

     (1)  The Report fully  complies with the  requirements  of Section 13(a) of
          the Securities Exchange Act of 1934; and

     (2)  The  information  contained  in the  Report  fairly  presents,  in all
          material respects, the financial condition and result of operations of
          the Company.


/s/ Scott L. Tarriff
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Scott L. Tarriff
Executive Vice President
August 11, 2003