AEterna Zentaris Announces 2004 Fourth Quarter and Full Year Financial Results Conference Call and Webcast QUEBEC CITY, Feb. 22 /PRNewswire-FirstCall/ -- AEterna Zentaris Inc. (TSX: AEZ; Nasdaq: AEZS) announced that its quarterly conference call and webcast have been scheduled for Monday, February 28, 2005 at 10:00 a.m. Eastern time. The call will follow the press release of AEterna Zentaris' 2004 fourth quarter and full year financial results issued earlier on the same day. Participants may access the live webcast via the Company's website at http://www.aeternazentaris.com/ in the "investors" section, or by telephone using the following numbers: 416-640-4127, 514-807-8791 or 1-800-814-4941. A replay of the webcast will also be available on the website for a period of 30 days. AEterna Zentaris Inc. is an oncology and endocrine therapy focused biopharmaceutical company with proven expertise in drug discovery, development and commercialization. The Company's broad 20 product pipeline leverages five different therapeutic approaches, including LHRH antagonists and signal transduction inhibitors. DATASOURCE: AETERNA ZENTARIS INC. (FORMERLY/ANCIENNEMENT - LES LABORATOIRES AETERNA CONTACT: Media Relations: Paul Burroughs, (418) 652-8525 ext. 406, ; Investor Relations: Ginette Vallieres, (418) 652-8525, ext. 265, ; Europe: Matthias Seeber, +49 69 42602 3425, ; To request a free copy of this organization's annual report, please go to http://www.newswire.ca/ and click on reports@cnw.

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