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 Annual Report of BioMarin Pharmaceutical Inc. (the
"Company") on Form 10-K for the year ended December 31, 2002, as filed with the
Securities and Exchange Commission on the date hereof (the "Report"), each of
the undersigned officers of the Company hereby certifies, pursuant to 18 U.S.C.
(S)1350, as adopted pursuant to (S)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
-------------------------
Fredric D. Price
Chairman and Chief Executive Officer
March 3, 2003

/s/ Louis C. Drapeau
-------------------------
Louis C. Drapeau
Vice President, Finance and Chief Financial Officer
March 3, 2003