Feprazone is primarily used as a non-steroidal anti-inflammatory drug (NSAID) for managing pain, inflammation, and swelling associated with rheumatoid arthritis and osteoarthritis. It provides relief by inhibiting the activity of cyclooxygenase enzymes, thereby reducing the production of inflammatory prostaglandins. Due to its analgesic and antipyretic properties, it is also used to alleviate mild to moderate pain and fever. Feprazone has a longer duration of action compared to some other NSAIDs, allowing for less frequent dosing. However, its use is limited in some regions due to potential side effects, particularly hematological toxicity.