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UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, DC 20549

FORM 10-Q

(Mark One)

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For the quarterly period ended March 31, 2022

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For the transition period from                     to

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Commission File Number: 001-38899

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Milestone Pharmaceuticals Inc.

(Exact Name of Registrant as Specified in its Charter)

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1111 Dr. Frederik-Philips Boulevard, Suite 420

Montréal, Québec CA H4M 2X6

(514) 336-0444

(Address, including zip code, and telephone number, including area code, of registrant’s principal executive offices)

Securities registered pursuant to Section 12(b) of the Act:

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Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.    Yes  ☒    No  ☐

Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T (§ 232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit such files).    Yes  ☒    No  ☐

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company, or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company,” and “emerging growth company” in Rule 12b-2 of the Exchange Act.

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If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act.  ☒

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).    Yes  ☐    No  ☒

As of May 4^th, 2022, the registrant had 29,925,271 common shares, no par value per share, outstanding.

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“Milestone Pharmaceuticals” and the Milestone logo appearing in this Quarterly Report on Form 10-Q are unregistered trademarks of Milestone Pharmaceuticals Inc. All other trademarks, trade names and service marks appearing in this Quarterly Report on Form 10-Q are the property of their respective owners. Solely for convenience, the trademarks and trade names in this Quarterly Report on Form 10-Q may be referred to without the ® and ™ symbols, but such references should not be construed as any indicator that their respective owners will not assert their rights thereto.

This Quarterly Report on Form 10-Q contains references to United States dollars and Canadian dollars. All dollar amounts referenced, unless otherwise indicated, are expressed in United States dollars. References to “$” are to United States dollars and references to “C$” are to Canadian dollars.

SPECIAL NOTE REGARDING FORWARD-LOOKING STATEMENTS

This Quarterly Report on Form 10-Q contains forward-looking statements about us and our industry that involve substantial risks and uncertainties. All statements other than statements of historical facts contained in this Quarterly Report on Form 10-Q, including statements regarding our strategy, future financial condition, future operations, projected costs, prospects, plans, objectives of management and expected market growth, are forward-looking statements. In some cases, you can identify forward-looking statements by terminology such as "aim," "anticipate," "assume," "believe," "contemplate," "continue," "could," "design," "due," "estimate," "expect," "goal," "intend," "may," "objective," "plan," "predict," "positioned," "potential," "seek," "should," "target," "will," "would" and other similar expressions that are predictions of or indicate future events and future trends, or the negative of these terms or other comparable terminology.

We have based these forward-looking statements largely on our current expectations and projections about future events and financial trends that we believe may affect our financial condition, results of operations, business strategy and financial needs. These forward-looking statements are subject to a number of known and unknown risks, uncertainties and assumptions, including risks described in the section titled "Risk Factors" and elsewhere in this Quarterly Report on Form 10-Q, regarding, among other things:

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The foregoing list of risks is not exhaustive. Other sections of this Quarterly Report on Form 10-Q and the section titled "Risk Factors" previously disclosed in Part I, Item 1A. in our Annual Report on Form 10-K may include additional factors that could harm our business and financial performance. Moreover, we operate in a very competitive and rapidly changing environment. New risk factors emerge from time to time, and it is not possible for our management to predict all risk factors nor can we assess the impact of all factors on our business or the extent to which any factor, or combination of factors, may cause actual results to differ materially from those contained in, or implied by, any forward-looking statements.

In light of the significant uncertainties in these forward-looking statements, you should not rely upon forward-looking statements as predictions of future events. Although we believe that we have a reasonable basis for each forward-looking statement contained in this Quarterly Report on Form 10-Q, we cannot guarantee that the future results, levels of activity, performance or events and circumstances reflected in the forward-looking statements will be achieved or occur at all. You should refer to the section titled "Risk Factors" previously disclosed in Part I, Item 1A. in our Annual Report on Form 10-K, filed with the SEC and under Milestone’s SEDAR profile at www.sedar.com on March 24, 2022, for a discussion of important factors that may cause our actual results to differ materially from those expressed or implied by our forward-looking statements. Furthermore, if our forward-looking statements prove to be inaccurate, the inaccuracy may be material. Except as required by law, we undertake no obligation to publicly update any forward-looking statements, whether as a result of new information, future events or otherwise.

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PART I—FINANCIAL INFORMATION

Item 1. Financial Statements.

Milestone Pharmaceuticals Inc.

Condensed Consolidated Balance Sheets (Unaudited)

(in thousands of US dollars, except share data)

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

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Milestone Pharmaceuticals Inc.

Condensed Consolidated Statements of Loss (Unaudited)

(in thousands of US dollars, except share and per share data)

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

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Milestone Pharmaceuticals Inc.

Condensed Consolidated Statements of Shareholders’ Equity (Unaudited)

(in thousands of US dollars, except share data)

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

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Milestone Pharmaceuticals Inc.

Condensed Consolidated Statements of Cash Flows (Unaudited)

(in thousands of US dollars)

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

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Milestone Pharmaceuticals Inc.

Notes to Condensed Consolidated Financial Statements

For The Three Months Ended March 31, 2022 and 2021 (Unaudited)

(in thousands of US dollars, except where noted and for share and per share data)

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Milestone Pharmaceuticals Inc.

Notes to Condensed Consolidated Financial Statements

For The Three Months Ended March 31, 2022 and 2021 (Unaudited)

(in thousands of US dollars, except where noted and for share and per share data)

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Milestone Pharmaceuticals Inc.

Notes to Condensed Consolidated Financial Statements

For The Three Months Ended March 31, 2022 and 2021 (Unaudited)

(in thousands of US dollars, except where noted and for share and per share data)

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Milestone Pharmaceuticals Inc.

Notes to Condensed Consolidated Financial Statements

For The Three Months Ended March 31, 2022 and 2021 (Unaudited)

(in thousands of US dollars, except where noted and for share and per share data)

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Milestone Pharmaceuticals Inc.

Notes to Condensed Consolidated Financial Statements

For The Three Months Ended March 31, 2022 and 2021 (Unaudited)

(in thousands of US dollars, except where noted and for share and per share data)

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Milestone Pharmaceuticals Inc.

Notes to Condensed Consolidated Financial Statements

For The Three Months Ended March 31, 2022 and 2021 (Unaudited)

(in thousands of US dollars, except where noted and for share and per share data)

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Item 2. Management’s Discussion and Analysis of Financial Condition and Results of Operations.

The following information should be read in conjunction with the unaudited interim condensed consolidated statements and the notes thereto included in this Quarterly Report on Form 10-Q and the audited annual consolidated financial statements and the notes thereto included in our Annual Report on Form 10-K for the year ended December 31, 2021, which was filed with the Securities and Exchange Commission, or SEC, on March 24, 2022. Our actual results may differ materially from those anticipated in these forward-looking statements as a result of various factors, including those discussed in “Risk Factors” and in other parts of this Quarterly Report on Form 10-Q.

Overview

We are a biopharmaceutical company focused on the development and commercialization of innovative cardiovascular medicines. Our lead product candidate etripamil is a novel, potent and short-acting calcium channel blocker that we designed as a rapid-onset nasal spray to be self-administered by patients. We are developing etripamil for the treatment of specific arrhythmias with a lead indication to treat paroxysmal supraventricular tachycardia, or PSVT, with subsequent indications to treat atrial fibrillation and rapid ventricular rate, or AFib-RVR, and other indications.

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Etripamil - Pivotal Clinical Program in PSVT

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PSVT is a rapid heart rate condition characterized by episodes of supraventricular tachycardia, or SVT, that start and stop without warning. Episodes of SVT are experienced by patients with symptoms often including palpitations, sweating, chest pressure or pain, shortness of breath, sudden onset of fatigue, lightheadedness or dizziness, fainting and anxiety. Calcium channel blockers have long been approved for the treatment of PSVT as well as other cardiac conditions. Calcium channel blockers available in oral form are frequently used prophylactically to control the frequency and duration of future episodes of SVT. For treatment of episodes of SVT, approved calcium channel blockers are administered intravenously under medical supervision, usually in the emergency department. The combination of convenient nasal-spray delivery, rapid-onset and short duration of action of etripamil has the potential to shift the current treatment paradigm for episodes of SVT away from the burdensome and costly emergency department setting. If approved, we believe that etripamil will be the first self-administered therapy for the rapid termination of episodes of SVT wherever and whenever they occur.

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Our late-stage etripamil clinical program for the treatment of PSVT is currently executing on two ongoing Phase 3 safety and efficacy trials, RAPID and NODE-303. The RAPID study is our ongoing pivotal Phase 3 safety and efficacy trial. This study enrolled its first patient in November 2020 and topline data is expected in mid-second half 2022. NODE-303 is an open-label global safety trial enrolling patients to collect safety data that when combined with the safety data from the rest of the program will form the safety dataset to be evaluated by the FDA and other regulatory agencies to form the basis for marketing approval. We have also completed our first Phase 3 safety and efficacy trial of etripamil, NODE-301, and its open-label safety extension trial, NODE-302. In addition to our PSVT clinical program, we began enrollment of patients in a Phase 2 proof-of-concept clinical trial titled ReVeRA in the first quarter of 2021 to evaluate the potential effectiveness of etripamil to reduce ventricular rate during AFib-RVR episodes.

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In March 2020, we reported topline results of the NODE-301 pivotal trial of etripamil for the treatment of PSVT, which is a placebo-controlled Phase 3 safety and efficacy trial. NODE-301, which enrolled a total of 431 patients across 65 sites in the United States and Canada, did not meet its primary endpoint of time to conversion of SVT to sinus rhythm compared to placebo over the five hour period in which patients wore a cardiac monitor following study drug administration.

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In July 2020, we announced that we received guidance from the U.S. Food and Drug Administration, or FDA, on our proposal to alter the size and design of our ongoing RAPID trial as well as the overall program based on the data from the NODE-301 trial.  The FDA indicated that the two trials, the RAPID trial and the completed NODE-301 trial, could potentially fulfill the efficacy requirement for our planned NDA for etripamil in patients with PSVT.

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Under an updated statistical analysis plan, or SAP, the primary efficacy endpoint for both the RAPID and NODE-301 trials will be defined as time to conversion over the first 30 minutes, with a target p-value of less than 0.05 for each trial. This endpoint supports the desire of patients to rapidly address their PSVT symptoms during an episode and ideally avoid visiting the emergency department. Later and earlier time points will also be assessed as part of secondary analyses to fully characterize the efficacy profile of etripamil.

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When employing the updated SAP retrospectively to the NODE-301 data, results in 54% of etripamil patients vs. 35% of placebo patients converted within 30 minutes (HR 1.87, p=0.02). Applying the same primary endpoint to the RAPID study, powering the study at 90% and using alpha of 0.05 to detect a 19% difference of etripamil versus placebo in 30 minute time to conversion that was observed in the NODE-301 study results in the size of 180 confirmed PSVT events.

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The RAPID study, is designed very similarly to NODE-301 however, will introduce a new treatment regimen to the program. Based on discussions with the FDA regarding maximizing the treatment effect of etripamil, the RAPID trial allows for repeat administration of study drug (either 70 mg of etripamil or placebo) for patients who have not experienced symptom relief within ten minutes of the first study drug administration. This repeat dose regimen, which is similar to current PSVT treatment practices in the emergency department setting, is tailored to the pharmacokinetic profile of etripamil to deliver increased exposure over approximately the first 30 minutes following initial administration. We believe that the repeat administration could benefit a broader group of patients, including those with more persistent episodes.

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In the NODE-301 study, 32% of etripamil patients and 14% of placebo patients converted to sinus rhythm within 10 minutes. The FDA agreed that the single and repeat administrations of etripamil could be pooled and compared to placebo for the primary analysis, resulting in no increase in the sample size.  

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Etripamil - Safety Studies in PSVT

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NODE-302 is our Phase 3 open-label safety extension of the NODE-301 trial. Patients who completed NODE-301 could enroll in NODE-302 and receive up to an additional 11 doses of etripamil. NODE-302 is a multi-center, open label study designed to evaluate the safety of etripamil nasal spray when self-administered by patients without medical supervision for spontaneous episodes of SVT in an outpatient setting. Efficacy assessments were also performed. Eligibility was contingent on satisfying all inclusion and exclusion criteria, including not experiencing a serious adverse event related to the study drug or the study procedure that precludes the self-administration of etripamil. We announced the top line data from the NODE-302 study which were presented at a late-breaking session of the Heart Rhythm Society’s Heart Rhythm 2022 Annual conference of 198 eligible NODE-301 patients, 169 (85%) enrolled in NODE-302 and 105 (62%) experienced a perceived episode of PSVT, self-administered etripamil and were included in the safety population. Overall, the PSVT conversion rate at 30 minutes following etripamil administration was 60.2% with a median time to conversion of 15.5 minutes (95% CI, 11.3-22.1 minutes). Among 40 patients who self-treated two consecutive episodes, 21 of 26 (81%) who converted on their first episode were also successfully converted on their second. Moreover, the need for emergency department (ED) intervention to terminate a PSVT episode was low (13% of patients and 8.5% of positively adjudicated PSVT episodes). Etripamil was generally well-tolerated, with adverse events consistent with those observed in previous trials; the majority of adverse events related to treatment were localized to the nasopharynx administration site, and were mild and brief.

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NODE-303 is a Phase 3, multi-center, open-label safety trial, evaluating the safety of etripamil when self-administered without medical supervision, and evaluating the treatment safety and efficacy of etripamil on multiple SVT episodes. The study initiated with the etripamil 70 mg single dose regimen and the 70 mg repeat dose regimen was introduced into the trial starting in the second half of 2021 following FDA acceptance of the protocol change.  The trial is designed to add to the safety data from the remainder of the development program, including both the NODE-301 and RAPID trials, in order to fulfill the safety data set needed for NDA filing. Our plan is to ascertain the final sizing of the trial following future discussions with the FDA and other regulatory authorities.

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We are conducting patient access programs to provide further access to etripamil to patients who have participated in the clinical development registration trials to treat future SVT episodes. These programs are tailored to meet the regulatory requirements in the territories in which the clinical sites are located.

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Etripamil: Atrial Fibrillation and Rapid Ventricular Rate

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As with PSVT, calcium channel blockers are also approved for use in intravenous form for the treatment of some episodes of atrial fibrillation in which patients experience rapid ventricular rates. We began enrollment in a Phase 2 proof-of-concept clinical trial, titled ReVeRA, in the first quarter of 2021 to evaluate the ability of etripamil to reduce ventricular rate in AFib-RVR episodes. The Phase 2 double blind, placebo controlled, proof-of-concept, which will be conducted in Canada in collaboration with the Montreal Heart Institute and other research centers, is expected to enroll approximately 50 patients randomized 1:1 to receive either 70 mg of etripamil nasal spray or placebo. The primary endpoint will assess reduction in ventricular rate, with key secondary endpoints including the time to achieve the maximum reduction in rate and the duration of the effect. The trial is to be conducted in the hospital or emergency department setting under medical supervision.

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Operations Overview

Since the commencement of our operations in 2003, we have devoted substantially all of our resources to performing research and development activities in support of our product development efforts, hiring personnel, raising capital to support and expand such activities, providing general and administrative support for these operations and, more recently preparing for commercialization. We operate our business using a significant outsourcing model.  As such, our team is composed of a relatively smaller core of employees who direct a significantly larger number of team members who are outsourced in the forms of vendors and consultants to enable execution of our operational plans. We do not currently have any products approved for sale, and we continue to incur significant research and development and general administrative expenses related to our operations.

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Since inception, we have incurred significant operating losses. For the three months ended March 31, 2022 and 2021, we recorded net losses of $14.0 million and $12.5 million, respectively. As of March 31, 2022, we had an accumulated deficit of $220.3 million. We expect to continue to incur significant losses for the foreseeable future. We anticipate that a substantial portion of our capital resources and efforts in the foreseeable future will be focused on completing the necessary development activities required for obtaining regulatory approval and preparing for potential commercialization of our product candidates. We had $100.2 million of cash, cash equivalents and short-term investments at March 31, 2022.

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We expect to continue to incur significant expenses and increasing operating losses for at least the next several years. Our net losses may fluctuate significantly from period to period, depending on the timing of our planned clinical trials and expenditures on other research and development activities. We expect our expenses will increase substantially over time as we:

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COVID-19 Business Update

The periods of reduced global economic activity and volatility, the overall disruption of global healthcare systems and the other risks and uncertainties associated with the pandemic could have a material adverse effect on our business, financial condition, results of operations and growth prospects.  Our global workforce utilized a hybrid remote and office based model and this adjustment may adversely impact our business (see below for discussion on Clinical Development impacts). In addition, working at home policies could increase cybersecurity risk and communication disruptions.  The ongoing pandemic has resulted in many state, local and foreign governments implementing, and continually making adjustments to, restrictions as the spread and severity of the COVID-19 virus has impacted their territories, including as it relates to newer strains.  We continue to monitor the pandemic as we evolve our business continuity plans and response strategy.

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Clinical Development

With respect to clinical development, we have taken measures to maintain patient safety and trial continuity and to preserve study integrity.  For our clinical development programs, we have experienced disruptions or delays in our ability to initiate trial sites and enroll and assess patients, and such disruptions or delays may continue. The COVID-19 pandemic continues to impact patient enrollment rates in all of our clinical studies. While COVID-19 resurgences around the world impact different geographies and clinical sites to varying degrees and at different times, the PSVT clinical program average overall enrollment rate has stabilized in 2021, compared to 2020. Enrollment rates are still slower than expected as a result of COVID-19. During the first quarter of 2022, the COVID-19 pandemic delayed the initiation of many proposed RAPID clinical trial sites as some health care institutions prioritized their resources for pandemic related activities with some precluding the initiation of new clinical trials or conduct of existing trials.  It also delayed the initiation of clinical trial sites and the enrollment of patients into our ReVeRA trial of etripamil for AFib-RVR performed in the acute care hospital setting in Canada, due to closures of clinical sites as well as to the increased stress that COVID-19 places on Emergency Departments logistics and staff.  Given the uncertainty and differing and evolving restrictions applicable to clinical trial sites and participants, additional disruptions and delays are possible. We will continue to monitor the impact of COVID-19 on our planned clinical sites and patient enrollment activities.  We could also see an impact on the ability to supply study drug, report trial results, or interact with regulators, ethics committees or other important agencies due to limitations in regulatory authority employee resources or otherwise.  In addition, we rely on contract research organizations or other third parties to assist us with clinical trials, and we cannot guarantee that they will continue to perform their contractual duties in a timely and satisfactory manner as a result of the COVID-19 pandemic.  If the COVID-19 pandemic continues and persists for an extended period of time, we could experience further significant disruptions to our clinical development timelines, which would adversely affect our business, financial condition, results of operations and growth prospects.

Other Financial and Corporate Impacts

While we expect the COVID-19 pandemic to continue to affect our business operations and financial results, the extent of the impact on our clinical development and regulatory efforts, our corporate development objectives and the value of and market for our common shares, will depend on future developments that are highly uncertain and cannot be predicted with confidence at this time, such as the ultimate duration of the pandemic, travel restrictions, business closure requirements in the United States, Canada, Europe and other countries, the timing and unpredictability of achieving widespread vaccination rates, the effectiveness of any vaccines against new variants, and the timing of the return of the global economy to pre-pandemic levels. In addition, we may be impacted by general economic, political, and market conditions, including deteriorating market conditions due to investor concerns regarding inflation and Russian hostilities in Ukraine and overall fluctuations in the financial markets in the United States and abroad.

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Components of Results of Operations

Research and Development

Research and development expenses consist primarily of salaries and fees paid to external service providers and also include personnel costs, including share-based compensation expense and other related compensation expenses. We expense research and development costs in the periods in which they are incurred. Costs for certain development activities are recognized based on an evaluation of the progress to completion of specific tasks using information and data provided to us by our vendors, collaborators and third-party service providers.

To date, substantially all of our research and development expenses have been related to the preclinical and clinical development of etripamil. As we advance etripamil or other product candidates for other indications, we expect to allocate our direct external research and development costs across each of the indications or product candidates. Further, while we expect our research and development costs for the development of etripamil in atrial fibrillation with rapid ventricular rate to increase for the ReVeRA clinical trial as we continue to expand this trial, we expect our research and development expenses related to the development of etripamil for PSVT to remain a very large majority of our total research and development expenses.

We expect our research and development expenses to increase as we continue the development of etripamil and prepare to pursue regulatory approval. The process of conducting the necessary clinical research to obtain regulatory approval is costly and time-consuming and is subject to uncertainties and delays, including as a result of the ongoing COVID-19 pandemic. COVID-19 has adversely affected enrollment rates. As a result of the uncertainties discussed above, we are unable to determine the duration and completion costs of our research and development projects or when and to what extent we will generate revenue from the commercialization and sale of our product candidates, if at all.

We recognize the benefit of Canadian research and development tax credits as a reduction of research and development costs for fully refundable investment tax credits.

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General and Administrative

General and administrative expenses include personnel and related compensation costs, expenses for outside professional services, lease expense, insurance expense and other general administrative expenses. Personnel costs consist of salaries, bonuses, benefits, related payroll taxes and share-based compensation. Outside professional services consist of legal, accounting and audit services and other consulting fees.

We expect to continue to incur expenses as a public company, including expenses related to compliance with the rules and regulations of the Securities and Exchange Commission, or SEC, and those of any national securities exchange on which our securities are traded, additional insurance expenses, investor relations activities, and other administrative and professional services.

Commercial

Commercial expenses consist primarily of personnel and related compensation costs, market and health economic research, and market development activities for PSVT and, to a lesser extent, AFib-RVR. The focus of these expenses is three-fold: first, we want to leverage rigorous primary and secondary research to fully understand our target disease states from the perspective of the patient, healthcare provider, and payer; second, we want to understand and document the burden of disease posed by PSVT and AFib-RVR from an epidemiology, healthcare resource use, and cost perspective; and third, we want to engage our target patient, physician, and payer stakeholders with evidence-based and compliant educational materials that serve to increase the awareness and understanding of the impact of PSVT and AFib-RVR on patients and the overall healthcare system.

Starting approximately six months to one year before we file our new drug application, or NDA with the FDA, we anticipate our commercial expenses will increase substantially as we invest in the infrastructure, personnel, and operational expenses required to launch our first product in the United States, if approved.

Interest Income

Interest income primarily consists of interest income from our cash equivalents and short-term investments.

Results of Operations

Comparison of the Three Months Ended March 31, 2022 and 2021

The following table summarizes our results of operations and changes:

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