<prompt> Leukotriene receptor antagonist used for bronchial asthma is:ZafirlukastZileutonCromolyn sodiumAminophylline  <response>: Ans. A ZafirlukastRef: KDT 8the p248Montelukast, zafirlukast and idalukast are Cys-LT1 receptor antagonists.Zileuton inhibits the production of leukotrienes by inhibiting the enzyme 5-lipoxygenase. 