EXHIBIT 23.1

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We consent to the incorporation by reference in Registration Statements No. 333-83089, 333-84183, 333-38094, 333-108716, 333-125743, 333-144221, 333-150253 and 333-158595 on Form S-8 and Registration Statements No. 333-158665, 333-161789, 333-149125 and 333-34958 on Form S-3 of our report dated November 25, 2009, relating to the consolidated financial statements of Avanir Pharmaceuticals, Inc. and subsidiaries appearing in this Annual Report on Form 10-K of Avanir Pharmaceuticals, Inc. for the year ended September 30, 2009.

/s/ KMJ Corbin & Company LLP

Costa Mesa, California
November 25, 2009