Hifenac-MR Tablet is a combination medication containing Aceclofenac 100mg, Paracetamol 325mg, and Chlorzoxazone 500mg, formulated for the management of musculoskeletal pain and inflammation. Aceclofenac, a non-steroidal anti-inflammatory drug (NSAID), exerts potent analgesic and anti-inflammatory effects by inhibiting cyclooxygenase enzymes, thereby reducing prostaglandin synthesis. Paracetamol provides additional analgesic and antipyretic benefits through central inhibition of prostaglandin synthesis, complementing the action of Aceclofenac. Chlorzoxazone acts as a centrally acting muscle relaxant, alleviating muscle spasm associated with painful musculoskeletal conditions. The combined action of these three agents makes Hifenac-MR effective in treating acute musculoskeletal disorders such as strains, sprains, and low back pain, as well as chronic conditions like osteoarthritis and rheumatoid arthritis. It is generally well-tolerated when used as directed but should be administered with caution in patients with a history of gastrointestinal ulcers, hepatic or renal impairment, or hypersensitivity to any component. The medication is intended for short-term use under medical supervision to minimize potential adverse effects. Hifenac-MR Tablet offers a comprehensive approach to pain management by addressing inflammation, pain, and muscle spasm concurrently.