Voltaren Joint Pain Regular Strength is applied right where it hurts and penetrates deep to relieve pain and reduce inflammation in the back, muscles and joints due to sprains, strains and sports injuries. Voltaren fights inflammation to relieve one of the root causes of back pain while also providing effective relief of pain. Formulated for adults and adolescents 16 years and older, Voltaren Back & Muscle Pain contains 1.16% of the active ingredient diclofenac diethylamine, a non-steroidal anti-inflammatory (NSAID) analgesic .Apply the gel 3 to 4 times a day for pain relief. The gel should not be used for more than 7 days unless recommended by a doctor. To be sure the product is right for you, always read and follow the label.