Levosmith 5mg Tablet contains Levocetirizine, a third-generation non-sedative antihistamine used primarily for the relief of allergic symptoms. Levocetirizine is the active enantiomer of cetirizine and acts as a selective antagonist of peripheral H1 histamine receptors, thereby inhibiting the effects of histamine in allergic responses. This medication is indicated for the treatment of allergic rhinitis, including both seasonal and perennial forms, as well as chronic idiopathic urticaria characterized by itching and hives. Levosmith 5mg provides effective symptomatic relief from nasal congestion, sneezing, rhinorrhea, and pruritus, improving patient quality of life. It is generally well tolerated, with a low incidence of sedation or anticholinergic side effects compared to first-generation antihistamines. The recommended dosage for adults and children over 12 years is one 5mg tablet once daily, taken orally with or without food. Caution is advised in patients with renal impairment, where dose adjustment may be necessary. Levosmith should be used under medical supervision, especially in pregnant or breastfeeding women. It is contraindicated in individuals with known hypersensitivity to levocetirizine or any excipients. Adverse effects are typically mild and may include headache, dry mouth, and fatigue.