Etodolac 400mg (SR) is a sustained-release formulation of the nonsteroidal anti-inflammatory drug (NSAID) Etodolac, primarily used to relieve pain, inflammation, and swelling associated with conditions like arthritis, osteoarthritis, rheumatoid arthritis, and musculoskeletal injuries.

Etodolac works by inhibiting cyclooxygenase (COX) enzymes, reducing the production of prostaglandins, which are chemicals in the body that promote inflammation, pain, and fever.
The sustained-release (SR) formulation allows the medication to be released gradually into the body, providing longer-lasting pain relief and reducing the frequency of dosing, typically taken once daily.
This medication is effective for managing chronic inflammatory conditions and musculoskeletal pain but should be used cautiously in patients with a history of gastric ulcers, heart conditions, or kidney problems due to potential side effects.