Aeterna Zentaris Inc. Consolidated Financial Statements As at

Aeterna Zentaris Inc.

Consolidated Financial Statements

As at December 31, 2018 and December 31, 2017 and for the years ended

December 31, 2018, 2017 and 2016

(presented in thousands of U.S. dollars)

Report of Independent Registered Public Accounting Firm

To the Board of Directors and Shareholders of

Aeterna Zentaris Inc.

Opinion on the Financial Statements

We have audited the accompanying consolidated statements of financial position of Aeterna Zentaris Inc. and its subsidiaries (the "Company") as of December 31, 2018 and 2017, and the related consolidated statements of changes in shareholders' (deficiency) equity, comprehensive income (loss) and cash flows for each of the three years in the period ended December 31, 2018, including the related notes (collectively referred to as the "consolidated financial statements"). In our opinion, the consolidated financial statements present fairly, in all material respects, the financial position of the Company as of December 31, 2018 and 2017, and the results of its operations and its cash flows for each of the three years in the period ended December 31, 2018 in conformity with International Financial Reporting Standards as issued by the International Accounting Standards Board.

These consolidated financial statements are the responsibility of the Company's management. Our responsibility is to express an opinion on the Company's consolidated financial statements based on our audits. We are a public accounting firm registered with the Public Company Accounting Oversight Board (United States) ("PCAOB") and are required to be independent with respect to the Company in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.

We conducted our audits of these consolidated financial statements in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the consolidated financial statements are free of material misstatement, whether due to error or fraud. The Company is not required to have, nor were we engaged to perform, an audit of its internal control over financial reporting. As part of our audits we are required to obtain an understanding of internal control over financial reporting but not for the purpose of expressing an opinion on the effectiveness of the Company's internal control over financial reporting. Accordingly, we express no such opinion.

Our audits included performing procedures to assess the risks of material misstatement of the consolidated financial statements, whether due to error or fraud, and performing procedures that respond to those risks. Such procedures included examining, on a test basis, evidence regarding the amounts and disclosures in the consolidated financial statements. Our audits also included evaluating the accounting principles used and significant estimates made by management, as well as evaluating the overall presentation of the consolidated financial statements. We believe that our audits provide a reasonable basis for our opinion.

"/s/PricewaterhouseCoopers LLP"

Toronto, Ontario, Canada

We have served as the Company's auditor since 1993.

Commitments and contingencies (note 27)

The accompanying notes are an integral part of these consolidated financial statements.

Approved by the Board of Directors

_________________________

The accompanying notes are an integral part of these consolidated financial statements

_________________________

The accompanying notes are an integral part of these consolidated financial statements.

The accompanying notes are an integral part of these consolidated financial statements.

The accompanying notes are an integral part of these consolidated financial statements.

Aeterna Zentaris Inc. ("Aeterna Zentaris" or the "Company") is a specialty biopharmaceutical company which is commercializing novel pharmaceutical therapies. On December 20, 2017, the United States Food and Drug Administration ("FDA") granted marketing approval for Macrilen (macimorelin) to be used in the diagnosis of patients with adult growth hormone deficiency ("AGHD"). On January 16, 2018, the Company, through Aeterna Zentaris GmbH, entered into a license and assignment agreement with Strongbridge Ireland Limited ("Strongbridge") to carry out development, manufacturing, registration, regulatory and supply chain services for the commercialization of Macrilen (macimorelin) in the United States and Canada (the "License and Assignment Agreement"). Effective December 19, 2018, Strongbridge sold the United States and Canadian rights to Macrilen to Novo Nordisk ("Novo").

The accompanying consolidated financial statements include the accounts of Aeterna Zentaris Inc., an entity incorporated under the Canada Business Corporations Act, and its wholly-owned subsidiaries (collectively referred to as the "Group"). Aeterna Zentaris Inc. is the ultimate parent company of the Group. The Company currently has three wholly-owned direct and indirect subsidiaries, Aeterna Zentaris GmbH ("AEZS Germany"), based in Frankfurt, Germany, Zentaris IVF GmbH, a wholly-owned subsidiary of AEZS Germany, based in Frankfurt, Germany, and Aeterna Zentaris, Inc., an entity incorporated in the state of Delaware and with offices in Summerville, South Carolina, in the United States.

The registered office of the Company is located at 1155 Rene-Levesque Blvd. West, 41st Floor, Montreal, Quebec H3B 3V2, Canada and its principal place of business is 315 Sigma Drive, Summerville, South Carolina 29486.

The Company's common shares are listed on both the Toronto Stock Exchange (the "TSX") and on the NASDAQ Capital Market (the "NASDAQ").

Basis of presentation

(a) Statement of compliance

These consolidated financial statements as at December 31, 2018 and December 31, 2017 and for the years ended December 31, 2018, 2017 and 2016 have been prepared in accordance with International Financial Reporting Standards ("IFRS") as issued by the International Accounting Standards Board ("IASB").

The accounting policies in these consolidated financial statements are consistent with those of the previous financial year except for the adoption of those standards in 2018 (note 4) and are consistent with the previous quarter.

These consolidated financial statements were approved by the Company's Board of Directors on March 29, 2019.

The preparation of financial statements in accordance with IFRS requires the use of certain critical accounting estimates and the exercise of management's judgment in applying the Company's accounting policies. Areas involving a high degree of judgment or complexity and areas where assumptions and estimates are significant to the Company's consolidated financial statements are discussed in note 4 - Critical accounting estimates and judgments.

(b) Principles of consolidation

These consolidated financial statements include any entity in which the Company directly or indirectly holds more than 50% of the voting rights or over which the Company exercises control. The Company controls an entity when the Company is exposed to, or has rights to, variable returns from its involvement with the entity and has the ability to affect those returns through its power over the entity. An entity is included in the consolidation from the date that control is transferred to the Company, while any entities that are sold are excluded from the consolidation from the date that control ceases. All inter-company balances and transactions are eliminated on consolidation.

(c) Foreign currency

Items included in the financial statements of the Group's entities are measured using the currency of the primary economic environment in which the entities operate (the "functional currency") which is U.S. dollars for the Company and its U.S. subsidiary, Aeterna Zentaris, Inc. and Euro ("EUR") for its German subsidiaries.

Assets and liabilities of the German subsidiaries are translated from EUR balances at the period-end exchange rates, and the results of operations are translated from EUR amounts at average rates of exchange for the period. The resulting translation adjustments are included in accumulated other comprehensive income within shareholders' equity (deficiency).

Foreign currency transactions are translated into the functional currency using the exchange rates prevailing at the dates of the underlying transaction. Foreign exchange gains and losses resulting from the settlement of such transactions and from the translation of monetary assets and liabilities not denominated in the functional currency are recognized in the consolidated statement of comprehensive income (loss).

2 Assessment of liquidity and management's plans

Since inception, the Company has incurred significant expenses in its efforts to develop and commercialize products. Consequently, the Company has incurred operating losses and negative cash flow from operations historically and in each of the last several years except for the year ended December 31, 2018when the Company earned revenue from the sale of a license for the adult indication of MacrilenTM (macimorelin) in the United States and Canada (note 6). As at December 31, 2018, the Company had an accumulated deficit of $310 million.

The Company has $14,512 of cash and cash equivalents as at December 31, 2018, and management believes it has sufficient liquidity to meet its current obligations of $5,596 and continue its planned level of expenses for at least, but not limited to the next twelve months from the date of issuance of these consolidated financial statements. The Company is focused on managing its operating expenses, and has the discretion to limit research and development costs, administrative expenses and capital expenditures in order to maintain its liquidity, until such time that additional sources of funding can be obtained. The Company's principal focus is on the licensing and development of MacrilenTM (macimorelin) and it currently does not have any other approved product. In January 2018, the Company signed a license and assignment agreement with Strongbridge Ireland Ltd., which as of December 19, 2018 is a wholly-owned subsidiary of Novo Nordisk A/S ("Novo"), to carry out development, manufacturing, registration and commercialization of MacrilenTM (macimorelin) in the U.S. and Canada (the "License and Assignment Agreement") (see note 6). Consistent with Strongbridge, Novo is funding 70% of the pediatric clinical trial submitted to the EMA and FDA, the Company's sole development priority.

On March 12, 2019, the Company announced that its board of directors has formed a special committee of independent directors (the "Special Committee") to review strategic options available to the Company. The Special Committee has approved the engagement by the Company of a financial advisor that is working with management to assist the Special Committee and the board of directors in considering a wide range of transactions (including opportunities for the license of MacrilenTM (macimorelin) outside of the United States and Canada, or other monetization transactions relating to MacrilenTM (macimorelin). Management has evaluated whether material uncertainties exist relating to events or conditions as described in Note 4 and has considered the following in making that critical judgment.

The Company's current operating budget and cash flows from operating activities in 2019 are expected to decline compared with 2018, however, the Company believes it will experience an increase in its royalty income, which, when combined with its forecasted cash flows, the Company believes will provide sufficient liquidity to finance operations and meet its commitments for at least, but not limited to, twelve months from the date of approval of these financial statements.

3 Summary of significant accounting policies

The accounting policies set out below have been applied consistently to all years presented in these consolidated financial statements except for the adoption of those standards in 2018 (note 4) and have been applied consistently by all Group entities.

Cash and cash equivalents

Cash and cash equivalents consist of unrestricted cash on hand and balances with banks, as well as short-term interest-bearing deposits, such as money market accounts, that are readily convertible to known amounts of cash and are subject to an insignificant risk of changes in value, with a maturity of three months or less from the date of acquisition.

Inventories are valued at the lower of cost or net realizable value. Cost is determined using the first-in, first-out method for all inventories. The Company's policy is to write down inventory that has become obsolete and inventory that has a cost basis in excess of its expected net realizable value. Increases in the reserve are recorded as charges in cost of product sales. For product candidates that have not been approved by the FDA, inventory used in clinical trials is written down at the time of production and recorded as research and development ("R&D") costs. For products that have been approved by the FDA, inventory used in clinical trials is expensed at the time the inventory is packaged for the clinical trial. All direct manufacturing costs incurred after approval are capitalized into inventory.

Restricted cash equivalents

Restricted cash equivalents are comprised of bank deposits, related to a guarantee for a long-term operating lease obligation and for a corporate credit card program that cannot be used for current purposes.

Property, plant and equipment and depreciation

Items of property, plant and equipment are recorded at cost, net of related government grants and accumulated depreciation and impairment charges. Depreciation is calculated using the following methods, annual rates and period:

Depreciation expense, which is recorded in the consolidated statement of comprehensive income (loss), is allocated to the appropriate functional expense categories to which the underlying items of property, plant and equipment relate.

Identifiable intangible assets and amortization

Identifiable intangible assets with finite useful lives consist of in-process R&D acquired in business combinations, patents and trademarks. In-process R&D acquired in business combinations is recognized at fair value at the acquisition date. Patents and trademarks are comprised of costs, including professional fees incurred in connection with the filing of patents and the registration of trademarks for product marketing and manufacturing purposes net of related government grants, impairment losses, where applicable, and accumulated amortization. Identifiable intangible assets with finite useful lives are amortized, from the time at which the assets are available for use, on a straight-line basis over their estimated useful lives of eight to fifteen years for in-process R&D and patents and ten years for trademarks. Amortization expense, which is recorded in the consolidated statement of comprehensive income (loss), is allocated to the appropriate functional expense categories to which the underlying identifiable intangible assets relate.

Goodwill is recognized as the fair value of the consideration transferred including the recognized amount of any non-controlling interest in the acquiree, less the fair value of the net identifiable assets acquired and liabilities assumed, as of the acquisition date. Subsequent to initial recognition, goodwill is measured at cost less accumulated impairment losses. Goodwill acquired in business combinations is allocated to groups of cash generating units ("CGU") that are expected to benefit from the synergies of the combination.

Impairment of assets

Items of property, plant and equipment and identifiable intangible assets with finite lives subject to depreciation or amortization, respectively, are reviewed for impairment whenever events or changes in circumstances indicate that the carrying amounts of the assets may not be recoverable. Management is required to assess at each reporting date whether there is any indication that an asset may be impaired. Where such an indication exists, the asset's recoverable amount is compared to its carrying value, and an impairment loss is recognized for the amount by which the asset's carrying amount exceeds its recoverable amount. The recoverable amount is the higher of an asset's fair value less costs to sell and value in use. For the purpose of assessing impairment, assets are grouped at the lowest levels for which there are separately identifiable cash flows, or CGU. In determining value in use of a given asset or CGU, estimated future cash flows are discounted to their present value using a pre-tax discount rate that reflects current market assessments of the time value of money and the risks specific to the asset. Impairment losses are allocated to the appropriate functional expense categories to which the underlying identifiable intangible assets relate, and are recorded in the consolidated statement of comprehensive income (loss).

Items of property, plant and equipment and amortizable identifiable intangible assets with finite lives that suffered impairment are reviewed for possible reversal of the impairment if there has been a change, since the date of the most recent impairment test, in the estimates used to determine the impaired asset's recoverable amount. However, an asset's carrying amount, increased due to the reversal of a prior impairment loss, must not exceed the carrying amount that would have been determined, net of depreciation or amortization, had the original impairment not occurred.

Goodwill is not subject to amortization and instead is tested for impairment annually or more often if there is an indication that the CGU to which the goodwill has been allocated may be impaired. Impairment is determined for goodwill by assessing whether the carrying value of a CGU, including the allocated goodwill, exceeds its recoverable amount, which is the higher of fair value less costs to sell and value in use. In the event that the carrying amount of goodwill exceeds its recoverable amount, an impairment loss is recognized in an amount equal to the excess. Impairment losses related to goodwill are not subsequently reversed.

Share purchase warrants

Share purchase warrants are classified as liabilities when the Company does not have the unconditional right to avoid delivering cash to the holders in the future. Each of the Company's share purchase warrants contains a written put option, arising upon the occurrence of a fundamental transaction, as that term is defined in the share purchase warrants, including a change of control. As a result of the existence of these put options, and despite the fact that the repurchase feature is conditional on a defined contingency, the share purchase warrants are required to be classified as a financial liability, since such contingency could ultimately result in the transfer of assets by the Company.

The warrant liability is initially measured at fair value, and any subsequent changes in fair value are recognized as gains or losses through profit or loss. Any transaction costs related to the share purchase warrants are expensed as incurred.

The warrant liability is classified as non-current, unless the underlying share purchase warrants will expire or be settled within 12 months from the end of a given reporting period.

Salaries and other short-term benefits

Salaries and other short-term benefit obligations are measured on an undiscounted basis and are recognized in the consolidated statement of comprehensive income (loss) over the related service period or when the Company has a present legal or constructive obligation to make payments as a result of past events and when the amount payable can be estimated reliably.

Post-employment benefits

The Company's subsidiary in Germany maintains defined contribution and unfunded defined benefit plans, as well as other benefit plans for its employees. For defined benefit pension plans and other post-employment benefits, net periodic pension expense is actuarially determined on a quarterly basis using the projected unit credit method. The cost of pension and other benefits earned by employees is determined by applying certain assumptions, including discount rates, the projected age of employees upon retirement, the expected rate of future compensation and employee turnover.

The employee future benefits liability is recognized at its present value, which is determined by discounting the estimated future cash outflows using interest rates of high-quality corporate bonds that are denominated in the currency in which the benefits will be paid and that have terms to maturity approximating the terms of the related future benefit liability. Actuarial gains and losses that arise in calculating the present value of the defined benefit obligation are recognized in other comprehensive income (loss), net of tax, and simultaneously reclassified in the deficit in the consolidated statement of financial position in the year in which the actuarial gains and losses arise and without recycling to the consolidated statement of comprehensive income (loss) in subsequent periods.

For defined contribution plans, expenses are recorded in the consolidated statement of comprehensive income (loss) as incurred-namely, over the period that the related employee service is rendered.

Termination benefits

Termination benefits are recognized in the consolidated statement of comprehensive income (loss) when the Company is demonstrably committed, without the realistic possibility of withdrawal, to a formal detailed plan to terminate employment earlier than originally expected. Termination benefit liabilities expected to be settled after 12 months from the end of a given reporting period are discounted to their present value, where material.

Financial instruments

The Company classifies its financial instruments in the following categories: "Financial assets at fair value through profit or loss ("FVTPL"); "Financial assets at amortized cost"; "Financial liabilities at "FVTPL"; and "Financial liabilities at amortized cost".

Financial assets at FVTPL: Financial assets carried at FVTPL are initially recorded at fair value and transaction costs are expensed in the statement of comprehensive income (loss). Realized and unrealized gains and losses arising from changes in the fair value of the financial assets held at FVTPL are included in the statement of comprehensive income (loss) in the period in which they arise.

Financial liabilities at FVTPL: These financial liabilities are initially recognized at fair value, and transaction costs directly attributable to issuing the warrants are expensed in the statement of comprehensive income (loss). Financial liabilities that are required to be measured at FVTPL have all fair value movements, excluding those related to changes in the credit risk of the liability which are recorded in other comprehensive income (loss), recognized in the statement of comprehensive income (loss).

Financial assets at fair value through other comprehensive income (FVTOCI): Investments in equity instruments at FVTOCI are initially recognized at fair value plus transaction costs. Subsequently they are measured at fair value, with gains and losses arising from changes in fair value recognized in other comprehensive income (loss) in the period in which they arise.