Akorn (AKRX) 8-K/A Financial Statements and Exhibits

Exhibit 23.1

Consent of Independent Registered Public Accounting Firm

Akorn, Inc.

Lake Forest, Illinois

We hereby consent to the incorporation by reference in the Registration Statements on Form S-8 (No. 333-124190, No. 333-161908, No. 333-167031 and No. 333-179476) of Akorn, Inc. of our report dated June 27, 2012, relating to the special purpose financial statements of the Nembutal®, Diuril® and Cogentin® Product Lines of Lundbeck, LLC, which appear in this report on Form 8­K/A.

/s/ BDO USA, LLP

Chicago, Illinois

June 29, 2012