Naproxen is a nonsteroidal anti-inflammatory drug (NSAID). Naproxen works by reducing hormones that cause inflammation and pain in the body. Naproxen is used to treat pain or inflammation caused by conditions such as arthritis, ankylosing spondylitis, tendinitis, bursitis, gout, or menstrual cramps. Naproxen may also be used for purposes not listed in this medication guide.
Naprosyn is a non-steroidal anti-inflammatory drug (NSAID). Naprosyn works by preventing the natural substances produced by your body that can cause inflammation. It also reduces hormones that cause pain and inflammation in the body, such as those in osteoarthritis and rheumatoid arthritis.