Articles from Merck Sharp & Dohme

Merck (NYSE: MRK), known as MSD outside the United States and Canada, today announced positive results from the Phase 3 HYPERION trial evaluating WINREVAIR™ (sotatercept-csrk) versus placebo (both in combination with background therapy) in recently diagnosed adults with pulmonary arterial hypertension (PAH, WHO* Group 1) functional class (FC) II or III at intermediate or high risk of disease progression. In the study, WINREVAIR reduced the risk of clinical worsening events by 76% (hazard ratio [HR] 0.24 [95% confidence interval [CI], 0.14 to 0.41]; p<0.0001) as measured by a composite endpoint of all-cause death, the need for non-planned PAH-related hospitalization ≥24 hours, atrial septostomy, lung transplantation or PAH deterioration. HYPERION included participants who were within their first year of diagnosis (median seven months and as early as one month), with over 70% of trial participants on double background therapy. In the pivotal Phase 3 study, STELLAR, participants were WHO Group 1, FC II or III at baseline and had an average disease duration of 8.8 years from PAH diagnosis to screening. The safety profile of WINREVAIR was generally consistent with that observed in previous trials. Results from the study were presented today at the 2025 European Respiratory Society (ERS) Congress and simultaneously published in the New England Journal of Medicine.

Merck (NYSE: MRK), known as MSD outside of the United States and Canada, today announced that the U.S. Food and Drug Administration (FDA) has accepted for review the New Drug Application (NDA) for doravirine/islatravir (DOR/ISL), an investigational, once-daily, oral, two-drug regimen for adults with HIV-1 infection that is virologically suppressed on antiretroviral therapy. The FDA has set a target action date of April 28, 2026, for the application under the Prescription Drug User Fee Act (PDUFA).

Merck (NYSE: MRK), known as MSD outside of the United States and Canada, today announced the first presentation of results from the Phase 3 ZENITH trial evaluating WINREVAIR™ (sotatercept-csrk) compared to placebo in adults with pulmonary arterial hypertension (PAH, Group 1 PH) WHO* functional class (FC) III or IV at high risk of mortality who were on maximum tolerated background PAH therapy. At a median follow-up of 10.6 months (range, 0.3-26.1), WINREVAIR reduced the relative risk of major morbidity and mortality events (the composite of all-cause death, lung transplantation and PAH worsening-related hospitalization of ≥24 hours) by 76% (HR=0.24 [95% CI, 0.13-0.43]; p<0.0001 [1-sided]) compared to placebo. For patients treated with WINREVAIR, 17.4% (n=15/86) experienced one or more major morbidity and mortality events, compared with 54.7% (n=47/86) of patients in the placebo arm. The safety profile of WINREVAIR in ZENITH was generally consistent with that observed in previous studies.