AEterna Zentaris to Announce First Quarter 2009 Financial and Operating Results and Hold Annual Shareholder Meeting on May 6, 2009

QUEBEC CITY, April 30 /PRNewswire-FirstCall/ - AEterna Zentaris Inc. , a global biopharmaceutical company focused on endocrine therapy and oncology, will announce its first quarter 2009 financial and operating results before market open on Wednesday, May 6, 2009. The Company will host a conference call and webcast to discuss these results later that same day at 3:30 p.m., Eastern Time.

Participants may access the live webcast via the Company’s website at www.aezsinc.com in the “Investors” section, or by telephone using the following numbers: 416-644-3422, 514-807-8791 or 800-587-1893. A replay of the webcast will also be available on the Company’s website for a period of 30 days.

The Company further announced that it will hold its Annual Shareholder Meeting also on Wednesday, May 6, 2009 starting at 10:30 a.m. Eastern Time, in Rooms 6 and 7 of the Centre Sheraton Montreal Hotel, 1201 Rene-Levesque Boulevard West, in Montreal.

About AEterna Zentaris Inc.

AEterna Zentaris Inc. is a global biopharmaceutical company focused on endocrine therapy and oncology with proven expertise in drug discovery, development and commercialization. News releases and additional information are available at www.aezsinc.com.

CONTACT: Investor Relations: Ginette Vallieres, 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

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