Pennsaid (diclofenac) is a nonsteroidal anti-inflammatory drug (NSAID). It works by reducing substances in the body that cause pain and inflammation.
Pennsaid (diclofenac topical 1.5% solution) is used to treat pain in the knees caused by osteoarthritis. This medication may not be effective in treating arthritis pain elsewhere in the body.
Pennsaid may also be used for purposes not listed in this medication guide.
Learn more about Pennsaid at Drugs.com