HD Zine 25mg Tablet contains Hydroxyzine, an antihistamine with anxiolytic, sedative, and antiemetic properties. Each tablet delivers 25mg of Hydroxyzine, indicated for the management of anxiety disorders, tension associated with psychoneurosis, and as a sedative adjunct in various clinical settings. Additionally, it is effective in the symptomatic relief of pruritus due to allergic conditions such as chronic urticaria and atopic dermatitis. Hydroxyzine acts by blocking H1 histamine receptors, thereby reducing allergic symptoms and exerting a central nervous system depressant effect that alleviates anxiety and induces sedation. HD Zine is also utilized as a premedication before anesthesia to reduce apprehension and produce sedation. The onset of action typically occurs within 15 to 30 minutes, with effects lasting several hours. Dosage should be individualized based on the patient's condition and response, with caution advised in patients with impaired hepatic or renal function. Common adverse effects include drowsiness, dry mouth, and dizziness. HD Zine is contraindicated in patients with hypersensitivity to Hydroxyzine or related compounds. Use during pregnancy and lactation should be under strict medical supervision. This medication should be used as directed by a healthcare professional.