Montek 10 mg contains Montelukast Sodium as its active ingredient. It is primarily used to prevent and manage symptoms of asthma, allergic rhinitis (such as sneezing, nasal congestion, and runny nose), and other seasonal allergies. Montelukast belongs to a class of medications called leukotriene receptor antagonists, which work by blocking substances in the body called leukotrienes that cause allergy and asthma symptoms