Naproxen is a non-steroidal anti-inflammatory drug (NSAID). It reduces swelling (inflammation) and pain in joints and muscles. It's used to treat: Naproxen is available on prescription as tablets or as a liquid that you swallow. Take naproxen with or just after a meal or snack. Naproxen is used as a treatment to relieve pain from various conditions such as headaches, muscle aches, tendonitis, dental pain, and menstrual cramps. It also reduces pain, swelling, and joint stiffness caused by conditions such as arthritis, bursitis, and gout attacks. Naproxen is a nonsteroidal anti-inflammatory drug (NSAID). It 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 is a nonsteroidal anti-inflammatory drug (NSAID) used to relieve symptoms of arthritis (eg, osteoarthritis, rheumatoid arthritis, or juvenile arthritis) such as inflammation, swelling, stiffness, and joint pain. Learn about side effects, dosage, uses, and more for naproxen, which is a generic prescription oral tablet that treats many conditions, such as arthritis. Naproxen is a common drug people use to treat pain and swelling. This article provides an overview of naproxen, including how it works, its uses, and more. Naproxen is used to treat a variety of inflammatory conditions and symptoms that are due to excessive inflammation, such as pain and fever (naproxen has fever-reducing, or antipyretic, properties in addition to its anti-inflammatory activity). [10] Learn about the side effects of naproxen, from common to rare, for consumers and healthcare professionals. Overview: Naproxen is a nonsteroidal anti-inflammatory drug (NSAID) used to relieve pain, reduce swelling, and lower fever. Common side effects include belly pain, upset stomach, heartburn, or. Find out how naproxen treats pain and swelling and how to take it. NHS medicines information on naproxen – what it's used for, side effects, dosage and who can take it.