AEterna Zentaris to Discontinue Phase 3 Trial in Multiple Myeloma With Perifosine

QUEBEC CITY, March 11, 2013 /PRNewswire/ - Aeterna Zentaris Inc. (NASDAQ: AEZS) (TSX: AEZ) (the "Company") today announced that an independent Data Safety Monitoring Board ("DSMB") has recommended discontinuing the ongoing Phase 3 study comparing the efficacy and safety of perifosine to placebo when combined with bortezomib (Velcade®) and dexamethasone in patients with relapsed or relapsed/refractory multiple myeloma. Based on the outcome of its pre-planned interim analysis of efficacy and safety, the DSMB recommended that patient enrollment be stopped and the study discontinued. The DSMB reported that it was highly unlikely the study would achieve a significant difference in its primary endpoint, progression free survival; no safety concerns were raised.

Juergen Engel, PhD, Aeterna Zentaris President and CEO stated, "We are obviously disappointed with the outcome of the interim analysis as reported to us by the DSMB, both from a patient and Company perspective. However, we remain focused on other significant opportunities such as our Phase 3 trial in endometrial cancer and Phase 2 trials in breast, prostate and bladder cancer with AEZS-108, our NDA filing for AEZS-130 as an oral diagnostic test for growth hormone deficiency in adults, as well as our earlier-stage oncology compound, AEZS-120."

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.

SOURCE AETERNA ZENTARIS INC.

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