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EXHIBIT 23.1

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

        We hereby consent to the incorporation by reference in the Registration Statement on Form S-1 (No. 333-179550), Form S-4 (No. 333-175078) and Form S-8 (333-179545) of Alkermes plc of our report dated May 17, 2012 relating to the financial statements and the effectiveness of internal control over financial reporting, which appears in this Form 10-K.

Boston, Massachusetts
May 18, 2012

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EXHIBIT 23.1

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM