Montelukast is
Montelukast and zafirlukast is selective antagonists of the CysLT1 receptor for leukotrienes. Competetively inhibit the bronchoconstictor effects of leukotrienes. Basic and clinical pharmacology Katzung 13th edition pg 324
Selective antagonists of leukotrienes receptor
Lipooxygenase inhibitor
H1 antagonist
H3 antagonist
Respiratory system