AEZS Aeterna Zentaris Inc

Aeterna Zentaris Inc. (NASDAQ: AEZS) (TSX: AEZS) (the “Company”), a specialty biopharmaceutical company commercializing and developing therapeutics and diagnostic tests, today announced the presentation of results from its first pediatric study of macimorelin as a growth hormone stimulation test for the evaluation of childhood-onset growth hormone deficiency (“CGHD”) at the 22nd European Congress of Endocrinology (e-ECE 2020), being held September 5-9, 2020.

The data were presented during the event in an ePoster titled, Pharmacokinetics and pharmacodynamics of macimorelin acetate (AEZS-130) in paediatric patients with suspected growth hormone deficiency (GHD), accommodated by an audio commentary. The full poster is now available on the Company’s website.

“We are grateful to have the opportunity to present at the e-ECE 2020 congress. We are incredibly encouraged by the results from this study, which demonstrated macimorelin’s safety and tolerability, and a PK and PD profile in a range expected from the adult development program,” commented Dr. Nicola Ammer, Chief Medical Officer of Aeterna Zentaris. “As we advance into our pivotal Study P02, which we expect to initiate in the first quarter of 2021, we are confident that we have selected with 1.0 mg/kg macimorelin the correct dosing regimen based on insights gained from the Study P01.”

The AEZS-130-P01 study (“Study P01”), was an open-label, group comparison, dose escalation trial and the first of two studies as agreed with the European Medicines Agency (“EMA”) in the Company’s Pediatric Investigation Plan (“PIP”) for macimorelin. Study P01 was designed to investigate the pharmacokinetics (“PK”), pharmacodynamics (“PD”), safety, and tolerability of macimorelin after single oral dosing of 0.25, 0.5, and 1.0 mg/kg in pediatric patients with suspected growth hormone deficiency (“GHD”).

The Company completed the study and announced positive results in April 2020. The completed study included 24 subjects aged 4 to 15 years. In the subjects who completed the study in accordance with the protocol, macimorelin demonstrated an excellent safety and tolerability profile. There were 88 adverse events (“AE”) reported in 23 subjects, none of which was assessed by the investigator as related to macimorelin. The majority of AEs (approximately 70%) were expected side effects related to the hypoglycemia introduced by the Insulin Tolerance Test. No significant changes in ECG parameters and safety laboratory values were noted in any of the three dosing cohorts.

Abstracts for the e-ECE 2020 conference have been published in Endocrine Abstracts. Endocrine Abstracts is an entirely online, open-access and fully citable collection of all the abstracts from e-ECE 2020.

For more information about Study P01, please visit EU Clinical Trials Register and reference EudraCT #2018-001988-23.

About e-ECE 2020

The European Congress of Endocrinology is the European Society of Endocrinology’s premier event, attracting over 3,500 international delegates each year across the spectrum of endocrinology. The event is a showcase of the best of science and clinical practice across the fields of endocrinology and metabolism, and aims to deliver to all audiences interested in the field, whether you are an experienced consultant, a scientist or a nurse, and whether you are well advanced in your career or just starting out. e-ECE 2020 is this year’s fully digital Congress bringing you the latest innovations in endocrine research and patient care. For more information, please visit the event website.

About Macimorelin

Macimorelin, a ghrelin agonist, is an orally-active small molecule that stimulates the secretion of growth hormone from the pituitary gland. Stimulated growth hormone levels are measured in blood samples after oral administration of macimorelin for the assessment of GHD.

In December 2017, the United States Food and Drug Administration (“FDA”) granted Aeterna Zentaris marketing approval for Macrilen™ to be used in the diagnosis of patients with adult growth hormone deficiency (AGHD). Macimorelin acetate has been granted Orphan Drug designation by the FDA for diagnosis of GHD. In January 2019, the European Commission granted marketing authorization for macimorelin to Aeterna Zentaris for diagnosis of growth hormone deficiency in adults. In March 2017, the Pediatric Committee of the EMA agreed to the Company’s PIP for macimorelin, a prerequisite for filing a marketing authorization application for any new medicinal product in Europe.

About Aeterna Zentaris Inc.

Aeterna Zentaris Inc. is a specialty biopharmaceutical company commercializing and developing therapeutics and diagnostic tests. The Company’s lead product, Macrilen™ (macimorelin), is the first and only U.S. FDA and European Commission approved oral test indicated for the diagnosis of adult growth hormone deficiency (AGHD). Macrilen™ is currently marketed in the United States through a license agreement with Novo Nordisk and Aeterna Zentaris receives double-digit royalties on sales. Aeterna Zentaris owns all rights to macimorelin outside of the U.S. and Canada.

Aeterna Zentaris is also leveraging the clinical success and compelling safety profile of macimorelin to develop it for the diagnosis of childhood-onset growth hormone deficiency (CGHD), an area of significant unmet need.

The Company is actively pursuing business development opportunities for the commercialization of macimorelin in Europe and the rest of the world, in addition to other non-strategic assets to monetize their value. For more information, please visit www.zentaris.com and connect with the Company on Twitter, LinkedIn and Facebook.

Forward-Looking Statements

This press release contains forward-looking statements (as defined by applicable securities legislation) made pursuant to the safe-harbor provision of the U.S. Securities Litigation Reform Act of 1995, which reflect our current expectations regarding future events. Forward-looking statements may include, but are not limited to statements regarding the timeline of the initiation of the Study P02 and include statements preceded by, followed by, or that include the words "will," "expects," "believes," "intends," "would," "could," "may," "anticipates," and similar terms that relate to future events, performance, or our results. Forward-looking statements involve known and unknown risks and uncertainties, including those discussed in our Annual Report on Form 20-F, under the caption "Key Information - Risk Factors" filed with the relevant Canadian securities regulatory authorities in lieu of an annual information form and with the SEC, and other factors discussed under the heading “Risk Factors” in the Company’s Registration Statement on Form F-1 (File No. 333-232935) filed with the SEC and other documents subsequently filed with or furnished to the SEC. Known and unknown risks and uncertainties could cause our actual results to differ materially from those in forward-looking statements. Such risks and uncertainties include, among others, our ability to raise capital and obtain financing to continue our currently planned operations, our ability to regain compliance with the continued listing requirements of the NASDAQ and continue to list our Common Shares on the NASDAQ, our ability to continue as a going concern is dependent, in part, on our ability to transfer cash from Aeterna Zentaris GmbH to Aeterna Zentaris and the U.S. subsidiary and secure additional financing, our now heavy dependence on the success of Macrilen™ (macimorelin) and related out-licensing arrangements and the continued availability of funds and resources to successfully commercialize the product, including our heavy reliance on the success of the License Agreement with Novo, the global instability due to the global pandemic of COVID-19, and its unknown potential effect on our planned operations, including studies, our ability to enter into out-licensing, development, manufacturing, marketing and distribution agreements with other pharmaceutical companies and keep such agreements in effect, our reliance on third parties for the manufacturing and commercialization of Macrilen™ (macimorelin), potential disputes with third parties, leading to delays in or termination of the manufacturing, development, out-licensing or commercialization of our product candidates, or resulting in significant litigation or arbitration, uncertainties related to the regulatory process, unforeseen global instability, including the instability due to the global pandemic of the novel coronavirus, our ability to efficiently commercialize or out-license Macrilen™ (macimorelin), our reliance on the success of the pediatric clinical trial in the European Union (“E.U.”) and U.S. for Macrilen™ (macimorelin), the degree of market acceptance of Macrilen™ (macimorelin), our ability to obtain necessary approvals from the relevant regulatory authorities to enable us to use the desired brand names for our product, our ability to successfully negotiate pricing and reimbursement in key markets in the E.U. for Macrilen™ (macimorelin), any evaluation of potential strategic alternatives to maximize potential future growth and shareholder value may not result in any such alternative being pursued, and even if pursued, may not result in the anticipated benefits, our ability to take advantage of business opportunities in the pharmaceutical industry, our ability to protect our intellectual property, and the potential of liability arising from shareholder lawsuits and general changes in economic conditions. Investors should consult our quarterly and annual filings with the Canadian and U.S. securities commissions for additional information on risks and uncertainties. Given these uncertainties and risk factors, readers are cautioned not to place undue reliance on these forward-looking statements. We disclaim any obligation to update any such factors or to publicly announce 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 applicable law.

Investor Contact:

Jenene Thomas JTC Team T (US): +1 (833) 475-8247 E: aezs@jtcir.com