Generic for Pennsaid 1.5% solution. FDA approved Diclofenac sodium topical solution is a nonsteroidal anti-in ammatory drug (NSAID) indicated for the treatment of signs and symptoms of osteoarthritis of the knee(s). Xrylix Sheets help improve circulation through the skin and control tension and relief of the muscles and the ligaments. The tape is non-medicated, hypoallergenic, and adheres well to the skin.