Voltaren Emulgel is a topical pain medicine containing diclofenac, a nonsteroidal anti-inflammatory drug (NSAID) that treats pain and inflammation. It is clinically proven to effectively relieve pain associated with recent or acute localized muscle and joint injuries. It is the #1 selling topical pain reliever in Canada and comes in 3 products: Voltaren Emulgel Original, Voltaren Emulgel Joint Pain, and Voltaren Emulgel Extra Strength.