Unicast 4mg contains Montelukast Sodium and is available as cherry-flavored chewable tablets. It is a prescription medication used to treat and prevent asthma symptoms and seasonal allergies. Each pack contains 30 chewable tablets manufactured by United Pharmaceuticals. Montelukast belongs to a class of drugs called leukotriene receptor antagonists. It works by blocking substances in the body that cause inflammation in the airways. The chewable tablet formulation makes it easier to administer, especially for younger patients. The cherry flavor helps improve palatability. The medication should be taken as prescribed by a healthcare provider. Store at room temperature away from moisture and light.