Naproxen is a painkiller that helps relieve pain and reduce swelling (inflammation). You can buy some types from pharmacies, but others are only available with a prescription. Naproxen is a type of painkiller called a non-steroidal anti-inflammatory drug (NSAID). 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 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] View naproxen information, including dose, uses, side-effects, renal impairment, pregnancy, breast feeding, contra-indications and important safety information. Naproxen - cas 22204-53-1, synthesis, structure, density, melting point, boiling point Nonprescription naproxen is used to reduce fever and to relieve mild pain from headaches, muscle aches, arthritis, menstrual periods, the common cold, toothaches, and backaches. 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. 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. Detailed Naproxen dosage information for adults and children. Includes dosages for Pain, Osteoarthritis, Rheumatoid Arthritis and more; plus renal, liver and dialysis adjustments.