Milestone Pharmaceuticals Reports 2nd Quarter 2022 Financial Results and Provides Clinical and Corporate Update.

MONTREAL and CHARLOTTE, N.C: Milestone Pharmaceuticals Inc. (Nasdaq: MIST), a biopharmaceutical company focused on the development and commercialization of innovative cardiovascular medicines, today reported financial results for the second quarter ended June 30, 2022, and provided a clinical and corporate update.

"Progress continues across our Phase 3 PSVT clinical program. Notably with the recent crossing of the 180th event in the RAPID trial, we now focus on the final stages of data cleaning and analysis and look forward to reporting top line data in the middle of the second half of this year," said Joseph Oliveto, President and Chief Executive Officer of Milestone Pharmaceuticals.

Recent Updates

Achieved Required Number of PSVT Events Treated with Double Blind Study Medication to Initiate Preparation for the Primary Efficacy Analysis for RAPID Trial; Company Remains on Track to Report RAPID Topline Data in Mid-Second Half 2022. In July 2022, the RAPID trial, in which patients are randomized 1:1 to receive either etripamil or placebo, reached the pre-specified target of 180 confirmed PSVT events, adjudicated by a blinded, independent expert committee, required for the primary efficacy analysis. Data from RAPID is now in the process of being cleaned, verified, and analyzed, and the Company continues to expect to unblind RAPID results and report topline data in the middle of the second half of 2022. The primary efficacy analysis for the RAPID trial and the post hoc analysis of the NODE-301 trial will be time to conversion of supraventricular tachycardia (SVT) over the first 30 minutes following initial study drug administration. The RAPID and NODE-301 trials could potentially serve to fulfill the efficacy requirement for a future New Drug Application submission to the United States Food and Drug Administration for etripamil in patients with PSVT.

Milestone's Partner, Ji Xing Pharmaceuticals Limited, Enrolled First Patient in Phase 3 Study of Etripamil in China. In July 2022, Milestone's partner, Ji Xing Pharmaceuticals Limited (Ji Xing), announced that it enrolled its first patient in its Phase 3 study of etripamil for the treatment of PSVT in China. The study is designed to evaluate the efficacy and safety of self-administered etripamil nasal spray as a treatment for PSVT with the eventual goal of generating clinical data potentially supportive of a new drug application in China. In May 2021, Milestone and Ji Xing entered into an...