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Ensifentrine (pMDI)

Maintenance Treatment of COPD

Phase 3Completed/Under MSD

Key Facts

Indication
Maintenance Treatment of COPD
Phase
Phase 3
Status
Completed/Under MSD
Company

About Verona Pharma

Verona Pharma was an independent, London-based biopharmaceutical company dedicated to advancing novel treatments for chronic respiratory diseases, with its entire strategy centered on the development of ensifentrine. The company's key achievement was the successful clinical development of this first-in-class, dual PDE3/PDE4 inhibitor, leading to its acquisition by Merck & Co., Inc. (MSD) in October 2025. This strategic acquisition transitioned Verona into a well-resourced subsidiary, leveraging MSD's global commercial and development capabilities to maximize the potential of ensifentrine in major markets like COPD and beyond. The deal represents a successful exit for shareholders and a validation of the company's innovative scientific platform.

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Other Maintenance Treatment of COPD Drugs

DrugCompanyPhase
Ensifentrine (Nebulized)Verona PharmaApproved