Leukotriene receptor antagonist used for bronchial asthma is :: (A) Zafirlukast, (B) Zileuton, (C) Cromolyn sodium, (D) Aminophylline
Answer is A. Montelukast, zafirlukast and pranlukast are Cys-LT1 receptor antagonists.
Zileuton inhibits the production of leukotrienes by inhibiting the enzyme 5-lipoxygenase.