Pharmacology Asthma e7171fb6 Mechanism of zileuton: A Cyclooxygenase inhibitor B 5-lipoxygenase inhibitor C Phosphodiesterase inhibitor D Mast cell degranulation High-Yield Explanation Ans. B. 5-lipoxygenase inhibitorZileuton is drug which inhibit the synthesis of leukotrienes as they are chemotactic and causes bronchoconstriction.