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 Annual Report on Form 10-K of Neurocrine Biosciences, Inc. (the “Company”) for the year ended December 31, 2006 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. 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) or 15(d), of the Securities Exchange Act of 1934; and
(2)	That information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

February 8, 2007	By:	/s/ Gary A. Lyons
	Name:	Gary A. Lyons
	Title:	President and Chief
		Executive Officer

     In connection with the Annual Report on Form 10-K of Neurocrine Biosciences, Inc. (the “Company”) for the year ended December 31, 2006 as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, Timothy P. Coughlin, Vice President and Chief Financial Officer 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) or 15(d), of the Securities Exchange Act of 1934; and
(2)	That information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

February 8, 2007	By:	/s/ Timothy P. Coughlin
	Name:	Timothy P. Coughlin
	Title:	Vice President and
		Chief Financial Officer