Lesat-M Tablet contains Levocetirizine 5mg and Montelukast 10mg, combining an antihistamine and a leukotriene receptor antagonist to provide effective management of allergic conditions. Levocetirizine, a third-generation non-sedating antihistamine, selectively inhibits peripheral H1 receptors, thereby reducing symptoms such as sneezing, nasal congestion, rhinorrhea, and itching associated with allergic rhinitis and chronic urticaria. Montelukast functions by blocking leukotriene D4 receptors in the lungs and bronchial tubes, preventing bronchoconstriction and inflammation, making it beneficial in the prophylaxis and chronic treatment of asthma and seasonal allergic rhinitis. Lesat-M is indicated for patients requiring simultaneous control of allergic rhinitis symptoms and bronchial asthma or those with concomitant allergic conditions. The combination enhances patient compliance by reducing pill burden while providing synergistic effects on the inflammatory pathways involved in allergic responses. Dosage should be as prescribed by a healthcare professional, typically one tablet once daily in the evening. Caution is advised in patients with hepatic impairment or hypersensitivity to any component. Common side effects may include headache, fatigue, dry mouth, and gastrointestinal disturbances. Patients should consult their physician if symptoms persist or worsen.