Verona Pharma plc is a biopharmaceutical company currently in its clinical development phase, focusing on the research, development, and eventual market launch of new therapies for respiratory illnesses where current treatments are inadequate. Its primary experimental medication is ensifentrine, an inhaled compound designed to simultaneously block both phosphodiesterase (PDE) 3 and PDE4 enzymes. This unique mechanism allows it to function both as a bronchodilator, helping to open the airways, and as an anti-inflammatory agent within a single drug.