Lanol ER Tablet contains Paracetamol 650 mg as its active ingredient, formulated for extended-release to provide prolonged analgesic and antipyretic effects. Paracetamol is widely used for the relief of mild to moderate pain associated with conditions such as headaches, musculoskeletal pain, dental pain, and dysmenorrhea, as well as for the reduction of fever. The extended-release formulation allows for sustained plasma concentrations, thereby enhancing patient compliance by reducing the frequency of dosing compared to immediate-release formulations. Lanol ER Tablet acts primarily by inhibiting the synthesis of prostaglandins in the central nervous system and through a peripheral action by blocking pain impulse generation. It is generally well tolerated, with a low incidence of adverse effects when used at recommended doses. However, caution is advised in patients with hepatic impairment or chronic alcohol use due to the risk of hepatotoxicity. Dosage adjustments should be made accordingly, and the maximum daily dose should not exceed 4 grams to avoid toxicity. Lanol ER Tablet should be used under medical supervision, particularly in populations with pre-existing liver conditions or when used concomitantly with other hepatotoxic drugs. It is contraindicated in patients with known hypersensitivity to paracetamol or any excipients in the formulation.