AEterna Zentaris to Announce Third Quarter 2012 Financial and Operating Results on November 13, 2012

Quebec City, Canada, November 7, 2012 – Aeterna Zentaris Inc. (NASDAQ: AEZS) (TSX: AEZ) (the ”Company”) will announce its third quarter 2012 financial and operating results on Tuesday, November 13, 2012, after market close. The Company will host a conference call the next morning, Wednesday, November 14, 2012 at 8:30 a.m. (Eastern Time), to discuss these results.

Participants may access the live webcast via the Company’s website at www.aezsinc.com in the "Newsroom" section, or by telephone using the following numbers: in Canada, 514-807-9895 or 647-427-7450, outside Canada, 888-231-8191. A replay of the webcast will also be available on the Company’s website for a period of 30 days.

About Aeterna Zentaris

Aeterna Zentaris is an oncology and endocrinology drug development company currently investigating treatments for various unmet medical needs. The Company’s pipeline encompasses compounds at all stages of development, from drug discovery through to marketed products. For more information, please visit www.aezsinc.com.

Investor Relations

Ginette Beaudet Vallières

Investor Relations Coordinator

(418) 652-8525 ext. 265

gvallieres@aezsinc.com

Media Relations

Paul Burroughs

Director of Communications

(418) 652-8525 ext. 406

pburroughs@aezsinc.com