FORM 6-K SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 REPORT OF FOREIGN ISSUER Pursuant to Rule 13a-16 or 15d-16 of the Securities Exchange Act of 1934 For the month of August 2009 AETERNA ZENTARIS INC. ------------------------------ 1405, boul. du Parc-Technologique Quebec, Quebec Canada, G1P 4P5 (Address of principal executive offices) Indicate by check mark whether the registrant files or will file annual reports under cover of Form 20 F or Form 40 F. Form 20 F /X/ Form 40 F / / Indicate by check mark whether the registrant by furnishing the information contained in this Form is also thereby furnishing the information to the Commission pursuant to Rule 12g3 2(b) under the Securities Exchange Act of 1934 Yes / / No /X/ If "Yes" is marked, indicate below the file number assigned to the registrant in connection with Rule 12g3 2(b): 82- -------- DOCUMENTS INDEX Documents Description ---------------------- 99.1 Press release dated August 17, 2009: AEterna Zentaris Announces Results from Two Phase 3 Studies with Cetrorelix in Benign Prostatic Hyperplasia 99.2 Material Change Report SIGNATURE Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized. AETERNA ZENTARIS INC. Date: August 21, 2009 By: /s/Dennis Turpin --------------------- ----------------------------------- Dennis Turpin Senior Vice President and Chief Financial Officer