EXHIBIT 23.1
CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
We hereby consent to the incorporation by reference, in this Registration Statement on Form S-1 of our report dated December 21, 2009, with respect to the financial statements of Arrowhead Research Corporation and Subsidiaries appearing in the Company’s Annual Report on Form 10-K for the year ended September 30, 2009, and to the reference to our Firm under the caption “Experts” in the Prospectus.
/s/ Rose, Snyder & Jacobs
Rose, Snyder & Jacobs
A Corporation of Certified Public Accounts
Encino, California
December 24, 2009