Milestone Pharmaceuticals Inc., a biopharmaceutical company, focuses on the development and commercialization of cardiovascular medicines in the United States and Canada. The company's lead product candidate is etripamil, a novel and potent calcium channel blocker, which has completed phase III clinical trial for the treatment of paroxysmal supraventricular tachycardia; and Phase II clinical trial for the treatment of atrial fibrillation and rapid ventricular rate. It has a license and collaboration agreement with Corxel Pharmaceuticals to develop and commercialize etripamil. Milestone Pharmaceuticals Inc.was incorporated in 2003 and is headquartered in Montreal, Canada.