AEterna Zentaris to Present at Upcoming William Blair & Company Small-Cap Growth Stock Conference in New York and BioContact in Quebec City

QUEBEC CITY, Sept. 26 /PRNewswire-FirstCall/ - AEterna Zentaris Inc. , a global biopharmaceutical company focused on endocrine therapy and oncology, today announced that its President and Chief Executive Officer, David J. Mazzo, Ph.D., will present a Company overview at the William Blair & Company Small-Cap Growth Stock Conference on Wednesday, October 3, 2007, at 10:40 am Eastern, in Room 6 of the New York Palace Hotel in New York City.

A live webcast of this presentation will be available on AEterna Zentaris’ website at www.aeternazentaris.com in the Investors section. A replay will also be available for a period of 90 days on the Company’s website.

On the following day, Thursday, October 4, Dr. Mazzo will also present a Company overview at BioContact at 9:30 am Eastern in the Place d’Armes Room of the Fairmont Le Chateau Frontenac Hotel in Quebec City, Canada.

About AEterna Zentaris Inc.

AEterna Zentaris Inc. is 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.aeternazentaris.com.

AETERNA ZENTARIS INC.

CONTACT: Jenene Thomas, Senior Director, Investor Relations & CorporateCommunications, (908) 938-1475, jenene.thomas@aeternazentaris.com; PaulBurroughs, Media Relations, (418) 652-8525 ext. 406,paul.burroughs@aeternazentaris.com

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