Naprosyn package insert / prescribing information for healthcare professionals. Includes: indications, dosage, adverse reactions and pharmacology. Drug Summary What Is Naprosyn ? Naprosyn (naproxen; other brand names: EC- Naprosyn and Anaprox/Anaprox DS), is a proprionic acid derivative and is considered a nonsteroidal anti-inflammatory drug (NSAID) and is used for pain management for many diseases, including: arthritic diseases, and inflammatory diseases such as: tendonitis, bursitis, and gout Naprosyn is also known as naproxen. It is a nonsteroidal anti-inflammatory medication that helps reduce pain and swelling in the body. Naproxen works by lowering hormones in the body that cause inflammation and pain. It is widely used to treat conditions such as arthritis, gout, and menstrual cramps. What Are the Uses of Naprosyn Tablets? Naprosyn 500 + Tablet is used for short-term relief of pain, inflammation, and swelling in conditions that affect joints and muscles. It works by blocking chemical messengers in the brain that tell us we have pain. It can help relieve pain in conditions like rheumatoid arthritis and osteoarthritis.