Voltaren Arthritis Pain Gel is a topical nonsteroidal anti-inflammatory (NSAID) gel with a proven safety profile for your arthritis pain. Now, you can buy Voltaren over the counter. Formerly a prescription product, it has been trusted by patients and doctors in the U.S. for 10+ years. Plus, thanks to the specialized Voltaren Emulgel™ formulation, it’s non-greasy—which is always nice.