QUÉBEC CITY, Oct. 11, 2012 /PRNewswire/ - Aeterna Zentaris Inc. (NASDAQ: AEZS) (TSX: AEZ) (the "Company") today announced that it has commenced an underwritten public offering of units (the "Offering"), consisting of common shares and warrants to purchase common shares. Roth Capital Partners, LLC, is acting as the sole book-running manager for the Offering. The Offering is subject to market conditions and there can be no assurance as to whether or when the Offering may be completed, or as to the actual size or terms of the Offering. The Offering is being conducted pursuant to the Company's effective shelf registration statement on Form F-10 filed with the U.S. Securities and Exchange Commission (the "SEC"), its corresponding Canadian base shelf prospectus and an exemption from the Autorité des marchés financiers permitting the Company to offer common shares and warrants in the United States. A preliminary prospectus supplement relating to the offering will be filed with the SEC and with the securities regulatory authority in each of the provinces of Canada. When available, a copy of the preliminary prospectus supplement and the accompanying base shelf prospectus can be obtained on the SEC's website at www.sec.gov or on the SEDAR website maintained by the Canadian Securities Administrators at www.sedar.com. Alternatively, copies of the preliminary prospectus supplement and the accompanying base shelf prospectus may be obtained upon request by contacting Roth Capital Partners, LLC, 888 San Clemente Drive, Newport Beach, CA, 92660, (800) 678-9147, e-mail: firstname.lastname@example.org. This press release does not and shall not constitute an offer to sell or the solicitation of an offer to buy any of the Company's securities, nor shall there be any sale of the Company's securities in any state or jurisdiction in which such offer, solicitation or sale would be unlawful prior to registration or qualification under the securities laws of any such state or jurisdiction. About Aeterna Zentaris Aeterna Zentaris is an oncology and endocrinology drug development company currently investigating treatments for various unmet medical needs. The Company's pipeline encompasses compounds at all stages of development, from drug discovery through to marketed products. For more information please visit www.aezsinc.com. Forward-Looking Statements This press release contains forward-looking statements made pursuant to the safe harbour provisions of the U.S. Securities Litigation Reform Act of 1995. Forward-looking statements involve known and unknown risks and uncertainties that could cause the Company's actual results to differ materially from those in the forward-looking statements. Such risks and uncertainties include, among others, the availability of funds and resources to pursue R&D projects, the successful and timely completion of clinical studies, the risk that safety and efficacy data from any of our Phase 3 trials may not coincide with the data analyses from previously reported Phase 1 and/or Phase 2 clinical trials, the ability of the Company to take advantage of business opportunities in the pharmaceutical industry, uncertainties related to the regulatory process and general changes in economic conditions. Investors should consult the Company's quarterly and annual filings with the Canadian and U.S. securities commissions for additional information on risks and uncertainties relating to forward-looking statements. Investors are cautioned not to rely on these forward-looking statements. The Company does not undertake to update these forward-looking statements. We disclaim any obligation to update any such factors or to publicly announce the result of any revisions to any of the forward-looking statements contained herein to reflect future results, events or developments, unless required to do so by a governmental authority or by applicable law.