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Treatment for Diagnosis of Adult Growth Hormone Deficiency

Aeterna Zentaris NDA for Macimorelin Acetate in AGHD Accepted for Filing by the FDA

Quebec City, Canada, January 6, 2014 - Aeterna Zentaris Inc. (NASDAQ: AEZS) (TSX: AEZS) (the "Company") today announced that the U.S. Food and Drug Administration ("FDA") has accepted for filing the Company's New Drug Application ("NDA") for its ghrelin agonist, macimorelin acetate, in Adult Growth Hormone Deficiency ("AGHD"). The acceptance for filing of the NDA indicates the FDA has determined that the application is sufficiently complete to permit a substantive review.

The Company's NDA, submitted on November 5, 2013, seeks approval for the commercialization of macimorelin acetate as the first orally-administered product that induces growth hormone release to evaluate AGHD. Phase 3 data have demonstrated the compound to be well tolerated, with accuracy comparable to available intravenous and intramuscular testing procedures. The application will be subject to a standard review and will have a Prescription Drug User Fee Act ("PDUFA") date of November 5, 2014. The PDUFA date is the goal date for the FDA to complete its review of the NDA.

David Dodd, President and CEO of Aeterna Zentaris, commented, "The FDA's acceptance of this NDA submission is another significant milestone in our strategy to commercialize macimorelin acetate as the first approved oral product for AGHD evaluation. We are finalizing our commercial plan for this exciting new product. We are also looking to broaden the commercial application of macimorelin acetate in AGHD for use related to traumatic brain injury victims and other developmental areas, which would represent significant benefit to the evaluation of growth hormone deficiency, while presenting further potential revenue growth opportunities for the Company."

About Macimorelin Acetate

Macimorelin acetate, a ghrelin agonist, is a novel orally-active small molecule that stimulates the secretion of growth hormone. The Company has completed a Phase 3 trial for use in evaluating AGHD, and has filed an NDA to the FDA in this indication. Macimorelin acetate has been granted orphan drug designation by the FDA for use in AGHD. Furthermore, macimorelin acetate is in a Phase 2 trial as a treatment for cancer-induced cachexia. Aeterna Zentaris owns the worldwide rights to this novel patented compound.

About AGHD

AGHD affects about 75,000 adults across the U.S., Canada and Europe. Growth hormone not only plays an important role in growth from childhood to adulthood, but also helps promote a hormonally-balanced health status. AGHD mostly results from damage to the pituitary gland. It is usually characterized by a reduction in bone mineral density, lean mass, exercise capacity, and overall quality of life.

About Aeterna Zentaris

Aeterna Zentaris is a specialty biopharmaceutical company engaged in developing novel treatments in oncology and endocrinology. The Company's pipeline encompasses compounds from drug discovery to regulatory approval. For more information, visit

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 efficiently commercialize one or more of its products or product candidates, 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.

Posted: January 2014

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