TD downgrades Milestone Pharmaceuticals, suspends target on Etripamil uncertainty
Investing.com -- TD Securities downgraded Milestone Pharmaceuticals (NASDAQ:MIST) to "Hold" and suspended its price target, citing regulatory uncertainty and commercialization challenges for its lead drug, etripamil, following a Complete Response Letter from the U.S. Food and Drug Administration.The FDA issued a Complete Response Letter for MIST’s etripamil New Drug Application for paroxysmal supraventricular tachycardia (pSVT), citing chemistry, manufacturing, and controls issues. While no safety or efficacy concerns were raised, the agency requested additional data on nitrosamine impurities based on new draft guidance published in September 2024, months after MIST had resubmitted its New Drug Application . The FDA also flagged the need for an inspection at a third-party facility performing release testing, which changed ownership during the New Drug Application review.