Sotatercept

Merck & Co. is looking to buy Verona Pharma for around $10 billion as it continues to seek ways to plug the looming revenue hole from upcoming patent expiration on its key cancer drug Keytruda (pembrolizumab). A deal for Verona would give Merck the chronic obstructive pulmonary disease (COPD) medicine Ohtuvayre (ensifentrine), which since FDA approval last year has got off to a strong launch.According to a report in the Financial Times on Wednesday, Merck and Verona are in advanced talks over an agreement priced at $107 per share — a 23% premium to the latter's closing price on July 8. Sources cited by the newspaper suggested that a deal could be announced imminently.Ohtuvayre is authorised for the maintenance treatment of COPD in adults, with the dual PDE3/4 inhibitor generating sales of $71.3 million in the first quarter of this year, far surpassing estimates. At the time the three-month results were announced, analysts at Jefferies said "we are witnessing the strongest COPD launch in history."The inhaled therapy, which is administered directly to the lungs via a standard jet nebuliser, is also being developed for other lung conditions, including asthma and cystic fibrosis. Analysts predict that the product could eventually generate peak annual sales of nearly $4 billion.The acquisition of Verona would boost Merck's respiratory franchise following last year's approval in the US and EU of the pulmonary arterial hypertension therapy Winrevair (sotatercept-csrk). The activin signalling inhibitor came into Merck's hands via the $11.5-billion purchase of Acceleron Pharma in 2021.

RAHWAY, NJ, USA I July 02, 2025 I 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 and granted priority review for a new supplemental Biologics License Application (sBLA) seeking approval to update the U.S. product label based on the Phase 3 ZENITH trial for WINREVAIR™ (sotatercept-csrk). In 2024, WINREVAIR was approved for the treatment of adults with pulmonary arterial hypertension (PAH, Group 1 PH) to increase exercise capacity, improve WHO* functional class (FC), and reduce the risk of clinical worsening events. The FDA has set a Prescription Drug User Fee Act (PDUFA), or target action date, of Oct. 25, 2025. The sBLA is based on data from the Phase 3 ZENITH trial. The ZENITH trial was the first PAH Phase 3 outcome study to use a primary endpoint comprised entirely of major morbidity and mortality events. It was also the first PAH Phase 3 study stopped early by an independent data monitoring committee for overwhelming efficacy. In ZENITH, WINREVAIR demonstrated a 76% reduction in the risk of a composite of all-cause death, lung transplantation, and hospitalization for PAH ≥24 hours compared to placebo. Improvement was observed early in treatment with increasing benefit throughout the study. The safety profile of WINREVAIR in ZENITH was generally consistent with that observed in previous studies. These results were published in the New England Journal of Medicine . “We are pleased that the FDA has accepted our sBLA for WINREVAIR and granted a priority review to consider an update to labeling for WINREVAIR to include the impressive results of ZENITH. There remains a significant unmet medical need for patients living with PAH who, despite being on background therapy, remain at higher risk of morbidity and mortality,” said Dr. Joerg Koglin, senior vice president, global clinical development, Merck Research Laboratories. “The FDA’s Priority Review designation acceptance of our sBLA reinforces our confidence in WINREVAIR for a broad range of patients and represents a critical step toward advancing the treatment of PAH.” WINREVAIR is currently approved in more than 45 countries based on the results from the STELLAR trial. *World Health Organization About ZENITH The ZENITH study ( NCT04896008 ) is a global, double-blind, placebo-controlled clinical trial to evaluate WINREVAIR when added to maximum tolerated background PAH therapy on time to first event of all-cause death, lung transplantation, or PAH worsening related hospitalization of ≥ 24 hours, in adult participants with WHO functional class III or IV PAH at high risk of mortality. ZENITH study inclusion criteria required Registry to Evaluate Early and Long-Term PAH Disease Management (REVEAL) Lite 2.0 risk score of ≥9. The study enrolled 172 participants, who were randomized in a 1:1 ratio to either WINREVAIR plus background PAH therapy or placebo plus background PAH therapy. The primary composite outcome measure was time to first confirmed major morbidity or mortality event. Events were defined as all-cause death, lung transplantation, or PAH worsening-related hospitalization of ≥ 24 hours. Secondary outcome measures included overall survival, transplant-free survival and several additional measures. The study excluded patients with PAH Group 1 subtypes: human immunodeficiency virus (HIV)-associated PAH and PAH associated with portal hypertension as well as diagnosis of pulmonary veno-occlusive diseases, pulmonary capillary hemangiomatosis or overt signs of capillary and/or venous involvement. Participants who completed the ZENITH trial were offered the opportunity to receive WINREVAIR as part of the open-label, long-term extension study, SOTERIA ( NCT04796337 ), consistent with that study’s eligibility criteria. About WINREVAIR ™ (sotatercept-csrk) for injection, for subcutaneous use, 45 mg, 60 mg WINREVAIR is FDA-approved for the treatment of adults with pulmonary arterial hypertension (PAH, WHO Group 1) to increase exercise capacity, improve WHO functional class (FC) and reduce the risk of clinical worsening events. WINREVAIR is the first activin signaling inhibitor therapy approved to treat PAH. WINREVAIR improves the balance between pro-proliferative and anti-proliferative signaling to modulate vascular proliferation. In preclinical models, WINREVAIR induced cellular changes that were associated with thinner vessel walls, partial reversal of right ventricular remodeling, and improved hemodynamics. WINREVAIR is the subject of a licensing agreement with Bristol Myers Squibb. About PAH Pulmonary arterial hypertension (PAH) is a rare, progressive and life-threatening blood vessel disorder characterized by the constriction of small pulmonary arteries and elevated blood pressure in the pulmonary circulation. Approximately 40,000 people in the U.S. are living with PAH. The disease progresses rapidly for many patients. PAH results in significant strain on the heart, leading to limited physical activity, heart failure and reduced life expectancy. The five-year mortality rate for patients with PAH is approximately 43%. About Merck At Merck, known as MSD outside of the United States and Canada, we are unified around our purpose: We use the power of leading-edge science to save and improve lives around the world. For more than 130 years, we have brought hope to humanity through the development of important medicines and vaccines. We aspire to be the premier research-intensive biopharmaceutical company in the world – and today, we are at the forefront of research to deliver innovative health solutions that advance the prevention and treatment of diseases in people and animals. We foster a diverse and inclusive global workforce and operate responsibly every day to enable a safe, sustainable and healthy future for all people and communities. For more information, visit www.merck.com and connect with us on X (formerly Twitter) , Facebook , Instagram , YouTube and LinkedIn . SOURCE: Merck