Full story: https://grafa.com/en/news/united-states/united-therapeutics-fda-clearance-summit-treprostinil-trial United Therapeutics received authorization to proceed with its Phase 2 SUMMIT trial of treprostinil SMI for pulmonary hypertension associated with chronic obstructive pulmonary disease (PH-COPD). The 16-week study will evaluate safety and tolerability in approximately 40 patients, with secondary endpoints measuring exercise capacity and the heart-related biomarker NT-proBNP. United Therapeutics anticipates beginning a Phase 3 registration study in 2028, provided the Phase 2 results are successful. United Therapeutics (NASDAQ:UTHR) received FDA clearance to proceed with a Phase 2 trial of treprostinil SMI for pulmonary hypertension associated with COPD. The 16-week, double-blind S