Exhibit 5.3
CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
We consent to the incorporation by reference in this Registration Statement of Concordia Healthcare Corp. on Form F-10 of our report dated March 23, 2015 on the carve-out financial statements of Covis Pharma Holdings S.à.r.l, which are included in the business acquisition report filed by Concordia Healthcare Corp. on July 3, 2015 and to the reference to us under the heading “Experts” in the prospectus.
/s/ Crowe Horwath LLP
New York, New York
July 17, 2015
