EXHIBIT 32

                                CERTIFICATIONS OF
               CHIEF EXECUTIVE OFFICER AND CHIEF FINANCIAL OFFICER
                       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 Neurocrine Biosciences, Inc. (the
"Company") on Form 10-Q for the period ended June 30, 2003 as filed with the
Securities and Exchange Commission on the date hereof (the "Report"), I, Gary
A. Lyons, President and Chief Executive Officer  of the Company, certify,
pursuant to 18 U.S.C. 1350, as adopted pursuant to 906 of the Sarbanes-Oxley
Act of 2002, that, to my knowledge:

     (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 results of operations
          of the Company.

Date August 8, 2003                        By:    /s/ Gary A. Lyons
                                           Name:  Gary A. Lyons
                                           Title: President and Chief Executive
                                                  Officer

In connection with the Quarterly Report of Neurocrine Biosciences, Inc. (the
"Company") on Form 10-Q for the period ended June 30, 2003 as filed with the
Securities and Exchange Commission on the date hereof (the "Report"), I, Paul
W. Hawran, Executive Vice President and Chief Financial Officer of the Company,
certify, pursuant to 18 U.S.C. 1350, as adopted pursuant to 906 of the
Sarbanes-Oxley Act of 2002, that, to my knowledge:

     (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 results of operations
          of the Company.

Date August 8, 2003                        By:    /s/ Paul W. Hawran
                                           Name:  Paul  W. Hawran
                                           Title: Executive Vice President and
                                                  Chief Financial Officer