L-Cetz Tablet contains Levocetirizine 5 mg, a second-generation antihistamine indicated for the relief of symptoms associated with allergic conditions such as allergic rhinitis (both seasonal and perennial) and chronic idiopathic urticaria. Levocetirizine, the active enantiomer of cetirizine, selectively inhibits peripheral H1 histamine receptors, thereby reducing the effects of histamine, a key mediator in allergic reactions. This results in the alleviation of symptoms including sneezing, nasal congestion, rhinorrhea, itching, and hives. L-Cetz Tablet offers a rapid onset of action with a favorable safety profile and minimal sedative effects compared to first-generation antihistamines, making it suitable for daily use. It is administered orally, typically once daily, with or without food, and dosage adjustments may be necessary in patients with renal impairment. The tablet should be used with caution in individuals with a history of hypersensitivity to levocetirizine or cetirizine. Common adverse effects include headache, dry mouth, and fatigue, although these are generally mild and transient. L-Cetz Tablet is contraindicated during pregnancy and lactation unless clearly necessary, and patients are advised to consult healthcare professionals before initiating therapy.