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


In connection  with the Quarterly  Report of BioMarin  Pharmaceutical  Inc. (the
"Company")  on Form 10-Q for the period ended  September  30, 2002 as filed with
the Securities and Exchange  Commission on the date hereof (the  "Report"),  the
undersigned hereby certifies, pursuant to 18 U.S.C. ss.1350, as adopted pursuant
to ss.906 of the Sarbanes-Oxley Act of 2002, that:

(1) The Report fully complies with the requirements of section 13(a) or 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 result of operations of the Company.


/s/ Fredric D. Price
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Fredric D. Price
Chairman and Chief Executive Officer
November 12, 2002


/s/ Louis Drapeau
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Louis Drapeau
Vice President, Finance and Chief Financial Officer
November 12, 2002