Exhibit 99.1


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


Each of the undersigned hereby certifies, in his capacity as an officer of Barr
Laboratories, Inc. (the "Company"), for the purposes of 18 U.S.C. Section 1350,
as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that to
the best of his knowledge:

(1) The Annual Report of the Company on Form 10-K for the period ended June 30,
2002 fully complies with the requirements of Section 15(d) 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 results of operations of the Company.


Dated: August 26, 2002



/s/Bruce L. Downey
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Bruce L. Downey
Chief Executive Officer

/s/William T. McKee
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William T. McKee
Chief Financial Officer