Montelukast (Mocast 10) 10mg Chewable Tablets are used to prevent and manage asthma symptoms and allergic rhinitis (hay fever). They work by blocking leukotrienes, which are chemicals in the body that cause inflammation and narrowing of the airways, helping to improve breathing. The chewable tablet form makes it easier to take, especially for those who have difficulty swallowing whole pills. Each pack contains 100 tablets, ideal for long-term use in controlling asthma and allergy symptoms.