L Cetriver 5mg Tablet contains Levocetirizine 5mg, a second-generation antihistamine used primarily for the treatment of allergic conditions. Levocetirizine acts as a selective inverse agonist of peripheral H1 histamine receptors, effectively reducing the symptoms associated with allergic rhinitis, chronic idiopathic urticaria, and other histamine-mediated allergic disorders. This medication provides relief from nasal congestion, sneezing, itching, and watery eyes, as well as pruritus and hives. Due to its high selectivity and minimal penetration of the blood-brain barrier, Levocetirizine has a lower incidence of sedation compared to first-generation antihistamines, making it suitable for daytime use. L Cetriver 5mg Tablet is administered orally, typically once daily, with or without food, and dosage adjustments may be necessary in patients with renal impairment. It is contraindicated in individuals with known hypersensitivity to Levocetirizine or Cetirizine and should be used cautiously in patients with severe renal dysfunction. Common adverse effects include headache, dry mouth, and fatigue, although these are generally mild and transient. Patients are advised to consult healthcare professionals before use, especially if pregnant, breastfeeding, or taking other medications, to avoid potential drug interactions.