Erinac D Tablet is a combination analgesic and anti-inflammatory medication containing Aceclofenac (100 mg), Paracetamol (500 mg), and Serratiopeptidase (15 mg). This formulation is designed to provide effective relief from pain and inflammation associated with musculoskeletal disorders, osteoarthritis, rheumatoid arthritis, and post-operative or traumatic conditions. Aceclofenac, a non-steroidal anti-inflammatory drug (NSAID), inhibits cyclooxygenase enzymes, thereby reducing the synthesis of prostaglandins responsible for pain and inflammation. Paracetamol acts centrally to alleviate pain and reduce fever through inhibition of prostaglandin synthesis in the central nervous system. Serratiopeptidase, a proteolytic enzyme, facilitates the breakdown of inflammatory mediators and promotes the resolution of edema and inflammation. Together, these components offer synergistic effects, enhancing analgesic efficacy while minimizing the required dosage of each individual agent. Erinac D is typically prescribed for short-term management of acute pain and inflammation, with dosing adjusted according to clinical response and patient tolerance. Caution is advised in patients with a history of gastrointestinal ulcers, hepatic or renal impairment, and hypersensitivity to NSAIDs. Use under medical supervision is recommended to ensure optimal therapeutic outcomes and to monitor for potential adverse effects.