Levokast Tablet contains Levocetirizine 5mg and Montelukast 10mg, combining an antihistamine and a leukotriene receptor antagonist to provide effective relief from allergic conditions. Levocetirizine, a third-generation non-sedating antihistamine, selectively inhibits peripheral H1 receptors, thereby reducing symptoms such as sneezing, rhinorrhea, nasal itching, and conjunctival irritation commonly associated with allergic rhinitis and chronic urticaria. Montelukast acts by blocking leukotriene D4 receptors in the respiratory tract, preventing bronchoconstriction, inflammation, and mucus production, which are key contributors to asthma and allergic rhinitis pathophysiology. The synergistic action of Levokast Tablet offers comprehensive management of allergic rhinitis, chronic urticaria, and asthma by addressing both histamine-mediated and leukotriene-mediated pathways. It is indicated for patients requiring combined therapy for symptomatic control of seasonal and perennial allergic rhinitis, as well as adjunctive treatment in asthma to improve respiratory function and reduce exacerbations. Levokast is generally well tolerated; common adverse effects may include headache, fatigue, and gastrointestinal discomfort. It is advisable to use Levokast under medical supervision, considering potential drug interactions and contraindications, especially in patients with hepatic or renal impairment.