diclofenac sodium gel

(dy-KLOH-fen-ak SOH-dee-um JEL) The gel form of a drug that is used to treat the symptoms of rheumatoid arthritis and is being studied in the prevention and treatment of some types of skin cancer. It blocks substances that cause inflammation and pain. It may also block the growth of new blood vessels needed for tumors to grow. It is a type of cyclooxygenase inhibitor and a type of nonsteroidal anti-inflammatory drug (NSAID). Also called Voltaren gel.