Voltaren and Voltarol contain the sodium salt of diclofenac. In the United Kingdom, Voltarol can be supplied with either the sodium salt or the potassium salt, while Cataflam, sold in some other countries, is the potassium salt only. Voltaren is a medicated gel that you can apply to the skin for relief from muscle and joint pain. It may take multiple days of application for significant pain relief. Topical diclofenac (Voltaren) is commonly used to treat arthritis pain in the hands, wrists, elbows, feet, ankles, or knees. Learn more about Voltaren gel for arthritis. The 1 doctor recommended OTC topical pain relief brand, Voltaren is approved for arthritis pain. It has a triple effect that relieves arthritis pain, improves mobility and reduces stiffness to provide prescription-strength relief over the counter and keep you in control. Discover Voltaren’s products, ranging from arthritis pain relief gel to dietary supplements. They support your joints and health so you can feel your best as you move through life. Voltaren oral tablets are used to treat mild to moderate pain, or signs and symptoms of osteoarthritis or rheumatoid arthritis. Voltaren is also used to treat ankylosing spondylitis. Discover Voltaren pain relief products to alleviate joint pain, back pain, muscle aches and more. Browse Voltaren gels and pain resources here. Explore the full range of Voltaren gels. Compare products by pain type and find out how to choose a Voltaren product to relieve your pain here. Voltaren gel contains diclofenac, a nonsteroidal anti-inflammatory drug (NSAID). Diclofenac works by reducing substances in the body that cause pain and inflammation. Brand Name US Brand Name Cambia Cataflam Voltaren Voltaren-XR Zipsor Zorvolex Back to top.