Exhibit 23.3
CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
We consent to the incorporation by reference in the Registration Statement on Form S-3 filed pursuant to Rule 462(b) of the Securities Act of 1933 of the reference to our firm under the caption “Experts” and to the incorporation by reference of our reports dated March 14, 2014, with respect to the consolidated financial statements of Zalicus Inc. and the effectiveness of internal control over financial reporting of Zalicus Inc., included in its Annual Report (Form 10-K) for the year ended December 31, 2013 filed with the Securities and Exchange Commission.
| /s/ Ernst & Young LLP |
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Boston, Massachusetts |
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January 27, 2015 |
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