LH 5 Tablet contains Levocetirizine 5mg, a potent third-generation non-sedative antihistamine used primarily for the relief of allergic symptoms. Levocetirizine is the active enantiomer of cetirizine and functions as a selective antagonist of peripheral H1 histamine receptors, thereby inhibiting the effects of histamine released during allergic reactions. This medication is indicated for the treatment of allergic rhinitis, including seasonal and perennial types, as well as chronic idiopathic urticaria characterized by itching and hives. LH 5 Tablet provides rapid onset of action and sustained symptom control with minimal central nervous system penetration, reducing the risk of sedation commonly associated with first-generation antihistamines. The recommended dosage for adults and children over 12 years is one tablet once daily, preferably in the evening, with dosage adjustments necessary for patients with renal impairment. Common adverse effects may include headache, dry mouth, and fatigue, though these are generally mild and transient. LH 5 Tablet should be used with caution in patients with severe renal dysfunction and is contraindicated in individuals with known hypersensitivity to levocetirizine or any of its excipients. It is advisable to consult a healthcare professional before initiating therapy to ensure appropriate use and monitoring.