<prompt> Montelukast mechanism of action is?Competitive inhibitor of leukotriene synthesisInhibits alpha receptorBeta receptor agonistNon-competitive inhibitor of leukotriene synthesis  <response>: ANSWER: A Competitive inhibitor of leukotriene synthesisREF: Goodman and Gillmans 11TH edition p. 478Zafirlukast and Montelukast are leukotriene receptor antagonists. Leukotriene-modifying drugs act either as competitive antagonist of leukotriene receptors or by inhibiting the synthesis of leukotriene 