The drug Montelukast, which is a member of the class of drugs known as leukotriene receptor antagonists, is found in MONTAIR 5MG CHEW TABLET. Children and teenagers can use it to treat and prevent the warning signs and symptoms of asthma and seasonal allergic rhinitis (aged between 6-14 years). Additionally, it can be used to stop bronchospasm, which is the narrowing of the airways brought on by exertion.