ST. LOUIS--(BUSINESS WIRE)--Covidien (NYSE: COV), a leading global provider of healthcare products, has introduced PENNSAID® (diclofenac sodium topical solution) 1.5% w/w to the U.S. market. PENNSAID is the only FDA-approved topical non-steroidal anti-inflammatory drug (NSAID) in a vehicle solution containing dimethyl sulfoxide (DMSO), a known penetrating agent. It is indicated for treatment of the signs and symptoms of osteoarthritis of the knee(s).