Voltaren Emulgel is used to treat pain and inflammation of muscles, joints, tendons and ligaments, due to sprains and strains, sports injuries (e.g. tennis elbow) and soft tissue rheumatism (e.g. bursitis; tendinitis). Voltaren Emulgel contains the non-steroidal anti-inflammatory drug (NSAID), diclofenac. Diclofenac works to relieve pain and reduce inflammation (swelling). The Emulgel technology helps the gel to penetrate deeply into the skin to enhance delivery of diclofenac to the site of pain. Voltaren Emulgel has a cooling, moisturizing effect with no strong odors.