Milestone Pharmaceuticals Provides Positive Regulatory Updates for Etripamil Pivotal Program in PSVT and Reports Second Quarter 2019 Financial Results

- FDA agrees to allow initiation of NODE-303 open-label safety study without test dose and in population consistent with ongoing studies -

- NODE-301 trial upsized from 100 to 150 adjudicated PSVT events to satisfy EMA requirements; Company remains on track for topline readout in 1H20 -

- Company to host mid-year business update conference call today at 8:00 a.m. ET -

MONTREAL and CHARLOTTE, N.C., Aug. 13, 2019 /PRNewswire/ -- Milestone Pharmaceuticals Inc. (Nasdaq: MIST), a Phase 3 clinical-stage biopharmaceutical company dedicated to developing and commercializing etripamil for the treatment of cardiovascular indications, today announced positive regulatory updates based on its interaction with the U.S. Food and Drug Administration (FDA) that advance its pivotal program of etripamil, the Company's novel, potent and short-acting calcium channel blocker, in patients with paroxysmal supraventricular tachycardia (PSVT). The Company also reported financial results for the second quarter ended June 30, 2019.

"We are very encouraged by our most recent interaction with the FDA and remain well positioned for continued execution of our etripamil pivotal program in PSVT," said Joseph Oliveto, President and Chief Executive Officer of Milestone Pharmaceuticals. "Following this interaction, we now look forward to beginning enrollment in our NODE-303 open-label global safety study before the end of the year. Execution of our pivotal Phase 3 NODE-301 trial is also tracking ahead of our initial projections, and upsizing of the trial will enable us to satisfy a European Medicines Agency (EMA) regulatory request, increase the study's power and potentially strengthen valuable sub-population analyses and pharmacoeconomic assessments, all while remaining on schedule to report topline data in the first half of 2020. Etripamil has the potential to serve as the first-ever self-administered therapy for the rapid termination of episodes of PSVT wherever and whenever they occur, and our continued progress takes us steps closer to realizing this potential to help patients living with PSVT."

Regulatory Updates

Following interaction with the FDA, the Company announced several regulatory updates to its etripamil pivotal program in patients with PSVT:

    --  Initiation of NODE-303 open-label safety study. Based on a review of
        etripamil safety data to date, the Company proposed and the FDA has
        agreed to allow initiation of patient enrollment in the NODE-303 study
        in a population consistent with ongoing studies. This includes older
        patients and those patients taking concomitant beta-blockers and calcium
        channel blockers, and without the in-office safety test dose that is
        currently required in the NODE-301 study.  NODE-303 is an open-label
        global safety trial that will assess up to 1,500 patient events from
        patients who did not participate in NODE-301 or its open-label extension
        study, NODE-302. NODE-303 will evaluate the safety of etripamil when
        self-administered without medical supervision and evaluate the safety
        and efficacy of etripamil during single or multiple PSVT episodes.
        Milestone expects to begin enrolling patients in the study before the
        end of the year.
    --  NODE-301 Study Upsized to Include 150 Adjudicated PSVT Events. Milestone
        has received agreement from the FDA to increase the target number of
        PSVT events in the Phase 3 NODE-301 trial to 150 events, up from 100
        events. The upsized trial, which satisfies a regulatory request from the
        EMA to eliminate un-blinded, third-party data reviews for purposes of
        handling potential randomization imbalances, increases the study's power
        and potentially strengthens valuable sub-population analyses and
        pharmacoeconomic assessments.  The rate of events in NODE-301, which
        remains blinded, is tracking ahead of the Company's initial projections,
        enabling Milestone to maintain the expectation of topline data in the
        first half of 2020, even with the additional PSVT events. Further, after
        the NODE-301 trial reaches its target adjudicated PSVT events,
        collection of blinded data from randomized patients who have not yet
        experienced an event will continue.  These data will be analyzed
        separately as a secondary data set, referred to as NODE-301B, and may
        contribute further to sub-population analyses and pharmacoeconomic
        assessments.

The NODE-301 trial is a Phase 3, multicenter, randomized, double-blind, placebo-controlled trial of etripamil versus placebo for terminating PSVT episodes in the outpatient setting. The primary endpoint of the NODE-301 study is time to conversion of PSVT to sinus rhythm after the administration of study drug as confirmed by a central independent adjudication committee. Secondary study endpoints include relief of symptoms commonly associated with an episode of PSVT such as heart palpitations, chest pain, anxiety, shortness of breath, dizziness, or fainting, and rating of treatment satisfaction questionnaire for medication (TSQM). As previously discussed with the FDA, NODE-301 will serve as the single efficacy study supporting our NDA submission.

Recent Highlights

    --  Completed Initial Public Offering. In May 2019, Milestone completed an
        initial public offering of 6,325,000 of its common shares at a public
        offering price of $15.00 per share, including shares sold pursuant to
        the exercise by the underwriters of their option to purchase additional
        shares. Gross proceeds to Milestone were approximately $95 million
        before deducting underwriting discounts, commissions and offering
        expenses.
    --  Presented Studies on the Economic Impacts of PSVT at the ISPOR 2019
        Annual Meeting. In May 2019, Milestone presented data on the economic
        impact of PSVT and current standard of care therapy at the International
        Society for Pharmacoeconomics and Outcomes Research (ISPOR) 2019 Annual
        Meeting. Data demonstrated that current standards of care are both
        burdensome and costly, underscoring the need for a therapy, such as
        etripamil, that could potentially serve as an effective option for
        patients that addresses these issues.
    --  Announced Additions to Board of Directors. In April 2019, the Company
        announced the appointment of Paul Edick as Chairman of its Board of
        Directors. Mr. Edick currently serves as Chairman and Chief Executive
        Officer of Xeris Pharmaceuticals, a publicly traded specialty
        pharmaceutical company leveraging its novel technology platforms to
        develop and commercialize ready-to-use injectable and infusible drug
        formulations. Milestone also announced the appointment of Michael
        Tomsicek to its Board of Directors. Mr. Tomsicek is currently the Chief
        Financial Officer of CRISPR Therapeutics, a biopharmaceutical company
        focused on developing gene-based medicines.

Second Quarter 2019 Financial Results

    --  As of June 30, 2019, Milestone had cash, cash equivalents, and
        short-term investments of $145.8 million and 24.5 million shares
        outstanding.
    --  Research and development expense for the second quarter of 2019 was
        $10.5 million compared with $2.6 million for the prior year period.  For
        the six months ended June 30, 2019, research and development expense was
        $18.3 million compared with $5.6 million for the prior year period.  The
        increase in 2019 amounts reflects spending on Milestone's full Phase 3
        clinical program evaluating etripamil for the treatment of PSVT.
    --  Commercial expense for the second quarter of 2019 was $2.2 million
        compared with $0.4 million for the prior year period.  For the six
        months ended June 30, 2019, commercial expense was $4.4 million compared
        with $1.1 million for the prior year period.  These increases reflect
        increased commercial headcount and related costs, continued commercial
        and market research, increases in Milestone's patient advocacy
        activities and costs for its medical affairs team focused on key opinion
        leaders' engagement and disease awareness.
    --  General and administrative expenses for the second quarter of 2019 were
        $1.6 million compared with $0.8 million for the prior year period. For
        the six months ended June 30, 2019, general and administrative expense
        was $2.6 million compared with $1.2 million for the prior year period.
        During 2019, Milestone increased its managerial headcount and, as a
        result, the related personnel costs.  In addition, Milestone incurred
        increased spending for consulting fees, recruiting fees and professional
        fees, including legal and accounting services incurred to support its
        IPO.
    --  For the second quarter of 2019, operating loss was $13.7 million
        compared to $3.6 million in 2018.  For the six months ended June 30,
        2019, Milestone's operating loss was $24.1 million compared to $7.8
        million in the prior year period.

Mid-Year Business Update Conference Call and Webcast

Milestone's management team will host a mid-year business update conference call and live audio webcast at 8:00 a.m. ET Tuesday, August 13, 2019, to discuss today's regulatory updates. To access the live call by phone, dial 800-529-3311 (domestic) or 470-495-9164 (international); the conference ID is 9498516. A live audio webcast of the event may also be accessed through the "Investors" section of Milestone's website at www.milestonepharma.com. A replay of the webcast will be available for 30 days following the event.

About Etripamil in Paroxysmal Supraventricular Tachycardia (PSVT)

Paroxysmal Supraventricular Tachycardia (PSVT) is a rapid heart rate condition that starts and stops without warning, often experienced by patients with symptoms 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, however, calcium channel blockers are currently administered intravenously under medical supervision, usually in the emergency department. By contrast, etripamil is designed to serve as a self-administered therapy for the rapid termination of episodes of PSVT. With its combination of convenient delivery, rapid onset and short duration of action, etripamil has the potential to shift the current treatment paradigm for PSVT away from the burdensome and costly emergency department settings by treating episodes of PSVT wherever and whenever they occur.

About Milestone Pharmaceuticals

Milestone is a Phase 3 clinical stage biopharmaceutical company dedicated to developing and commercializing the investigational new drug etripamil for the treatment of cardiovascular indications. Etripamil is a novel, potent and short-acting calcium channel blocker designed by Milestone and being developed as a rapid-onset nasal spray to be administered by the patient to terminate episodes of PSVT as they occur. Milestone is actively recruiting patients for a Phase 3 clinical trial of etripamil for the treatment of PSVT. Milestone is also planning to initiate a Phase 2 clinical trial in the second half of 2019 in atrial fibrillation, another rapid heart rate condition, and expects to subsequently initiate an additional Phase 2 clinical trial in angina in 2020 to establish proof-of-concept for the broader use of etripamil.

Forward-Looking Statements:

This press release contains forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995. Words such as "may," "will," "expect," "plan," "anticipate," "estimate," "intend" and similar expressions (as well as other words or expressions referencing future events, conditions or circumstances) are intended to identify forward-looking statements. These forward-looking statements are based on Milestone's expectations and assumptions as of the date of this press release. Each of these forward-looking statements involves risks and uncertainties. Actual results may differ materially from these forward-looking statements. Forward-looking statements contained in this press release include statements regarding (i) the development of product candidates, (ii) the design, progress, timing, scope and results of clinical trials, (iii) the anticipated timing of disclosure of results of clinical trials, (iv) the potential benefits and success of the commercialization of product candidates, (v) the likelihood data will support future development and (vi) the likelihood of obtaining regulatory approval of Milestone's product candidates. Important factors that could cause actual results to differ materially from those in the forward-looking statements are set forth in Milestone's filings with the U.S. Securities and Exchange Commission, including in its quarterly report on Form 10-Q for the period ended March 31, 2019, under the caption "Risk Factors." Except as required by law, Milestone assumes no obligation to update any forward-looking statements contained herein to reflect any change in expectations, even as new information becomes available.



                                                         
           
       CONSOLIDATED STATEMENT OF OPERATIONS


                                                                   
            (Unaudited)


                                                                                                          
            
              '000                
         
              '000





     [In US dollars]                                                                                          Three months ended June 30,                Six months ended June
                                                                                                                                                              30,

                                                                                                                                                                          ---

                                                                                                                 2019            2018              2019                         2018


                                                                                                           
            $     
            $       
            $                  
            $






     
              Operating expenses



     Research and development, net of tax credits                                                             10,527           2,551            18,292                        5,642



     General and administrative                                                                                1,641             750             2,620                        1,189



     Commercial                                                                                                2,166             375             4,352                        1,100

                                                                                                                                                                              ---


     
              Loss from operations                                                                        (14,334)        (3,676)         (25,264)                     (7,931)



     Interest income, net of bank charges                                                                        672              89             1,172                          180

                                                                                                                                                                              ---


     
              Loss and comprehensive loss before income taxes                                             (13,662)        (3,587)         (24,092)                     (7,751)



     
              Income tax (recovery) expense                                                                    (4)              2                18                           18

                                                                                                                                                                              ---


     
              Net loss and comprehensive loss for the period                                              (13,658)        (3,589)         (24,110)                     (7,769)

                                                                                                                                                                              ---




     
              Weighted average number of shares outstanding,



     
                    basic and diluted                                                                   13,190,638         282,322         6,931,611                      275,450

                                                                                                                                                                              ---




     
              Net loss per share, basic and diluted                                                         (1.04)        (12.71)           (3.48)                     (28.20)

                                                                                                                                                                              ---


                                                                               
              
       CONDENSED CONSOLIDATED BALANCE SHEET


                                                                                            
           (Unaudited)





              [In US dollars]                                                                                                           '000




                                                                                                                                       June 30, 
     December 31,


                                                                                                                                           2019                  2018


                                                                                                                                   
     
            $         
              $

                                                                                                                                                                 ---


              
                ASSETS



              
                Current assets



              Cash, cash equivalents and short-term investments                                                                        145,824                85,976



              Prepaid expenses and other current assets                                                                                  5,727                 2,075



              
                Total current assets                                                                                        151,551                88,051




              Operating lease right-of-use asset                                                                                           243                     -



              Property and equipment                                                                                                        43                    30



              
                Total assets                                                                                                151,837                88,081






              
                LIABILITIES



              
                Current liabilities



              Accounts payable and accrued liabilities                                                                                   6,288                 4,477



              Current portion of operating lease liabilities                                                                               175                     -



              Income taxes payable                                                                                                           -                   56



              
                Total current liabilities                                                                                     6,463                 4,533






              Operating lease liabilities                                                                                                   61                     -




              
                Total liabilities                                                                                             6,524                 4,533






              
                Convertible preferred shares                                                                                      -              138,758

                                                                                                                                                                 ---




              
                Shareholders' equity (deficit)



              Share capital



              Common shares, no par value, unlimited shares authorized,



              
                 24,490,742 shares issued and outstanding at June 30, 2019 and                                              226,211                 2,039
    596,787 shares issued and outstanding at December 31, 2018



              Additional paid in Capital                                                                                                 3,116                 2,655



              Cumulative translation adjustment                                                                                        (1,634)              (1,634)



              Accumulated deficit                                                                                                     (82,380)             (58,270)




              
                Total shareholders' equity (deficit)                                                                        145,313              (55,210)




              
                Total liabilities and shareholders' equity                                                                  151,837                88,081

Contact:

David Pitts
Argot Partners
212-600-1902
david@argotpartners.com

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SOURCE Milestone Pharmaceuticals, Inc.