Exhibit 23.3
Consent of Independent Registered Public Accounting Firm
We hereby consent to the incorporation by reference in this Registration Statement (No. 333-239264) on Form F-1/A of Aeterna Zentaris Inc. of our report dated March 30, 2020 relating to the consolidated financial statements, which appears in Aeterna Zentaris Inc.’s Annual Report on Form 20-F for the year ended December 31, 2019. We also consent to the reference to us under the heading “Experts” in such Registration Statement.
/s/ PricewaterhouseCoopers LLP
Chartered Professional Accountants, Licensed Public Accountants
Toronto, Canada
June 30, 2020
PricewaterhouseCoopers LLP
PwC Tower, 18 York Street, Suite 2600, Toronto, Ontario, Canada M5J 0B2
T: +1 416 863 1133, F: +1 416 365 8215, www.pwc.com/ca
“PwC” refers to PricewaterhouseCoopers LLP, an Ontario limited liability partnership.