Piroxicam is a non-steroidal anti-inflammatory drug (NSAID) that is used to treat pain and swelling caused by arthritis, osteoarthritis, or rheumatoid arthritis. There are several synonyms for piroxicam, including Feldene, Roxam, and Pirox. These drugs work by blocking the production of prostaglandins, which are chemicals in the body that cause inflammation, pain, and fever. Other drugs in the same class as piroxicam include aspirin, ibuprofen, and naproxen. These drugs are often used in combination with other medications or physical therapy to provide relief from joint pain, stiffness, and inflammation. It is important to talk to a doctor before starting any new medication or treatment.