AEterna Zentaris To Present At Three Upcoming Investor Conferences In The United States And Europe

QUEBEC CITY, Nov. 1 /PRNewswire-FirstCall/ - AEterna Zentaris Inc. today announced that Gilles Gagnon, President and Chief Executive Officer of the Company, will present a corporate update at the Rodman & Renshaw Techvest 7th Annual Healthcare Conference on Monday, November 7, 2005, at 8:40 a.m. ET, in the Kennedy I Room of the Palace Hotel in New York City.

On Tuesday, November 8, 2005 at 9:30 a.m. ET, Mr. Gagnon will also present a corporate update at the CIBC World Markets Sixteenth Annual Healthcare Conference in the West Foyer of the Waldorf Astoria Hotel in New York City.

A live webcast of both these presentations will be available on AEterna Zentaris' website in the Investors section at www.aeternazentaris.com . A replay will also be available at the same address for a period of 30 days.

Finally, Michel Cousineau, Director, Business Development at AEterna Zentaris will present a corporate update at BIO-Europe on Wednesday, November 9, 2005 at 9:30 a.m. (local time), in Room No. 2, Level 4 of the International Congress Center, in Dresden, Germany.

About AEterna Zentaris Inc.

AEterna Zentaris Inc. is a growing global biopharmaceutical company engaged in the discovery, development and marketing of therapies for cancer and endocrine disorders.

AEterna Zentaris also owns 50.03% of Atrium Biotechnologies Inc. , a developer, manufacturer and marketer of science-based products for the cosmetics, pharmaceutical, chemical and nutritional industries.

News releases and additional information are available at

www.aeternazentaris.com .

AETERNA ZENTARIS INC. (FORMERLY/ANCIENNEMENT - LES LABORATOIRES AETERNA

CONTACT: Media Relations: Paul Burroughs, (418) 652-8525 ext. 406,paul.burroughs@aeternazentaris.com; Investor Relations: Ginette Vallieres,(418) 652-8525 ext. 265, ginette.vallieres@aeternazentaris.com; Europe:Matthias Seeber, +49 69 42602 3425, matthias.seeber@zentaris.com; Torequest a free copy of this organization's annual report, please go tohttp://www.newswire.ca and click on reports@cnw.

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