Naproxen is a pain reliever and fever reducer that belongs to the class of drugs known as nonsteroidal anti-inflammatory drugs (NSAIDs). It is available in over-the-counter and prescription formulations.

Pain conditions that may be treated with naproxen include:

• Headache
• Backaches
• Menstrual pain
• Muscle aches
• Toothaches
• Arthritis, including osteoarthritis, rheumatoid arthritis, juvenile arthritis, gout and ankylosing spondylitis
• Tendinitis and bursitis

Scientists believe that naproxen works by inhibiting prostaglandin production. Prostaglandins are hormone-like substances in the body that mediate a wide range of physiological functions.

Naproxen is available as a regular tablet, extended-release tablet and liquid. Although the drug is considered to be safe, it may not be advised for patients with some medical conditions or for certain populations. Some side effects of naproxen include drowsiness, headache and dizziness. Patients are advised not to take naproxen without first consulting a physician.

The U.S. Food and Drug Administration (FDA) has warned that naproxen and other non-aspirin NSAIDs increase the risk of cardiovascular events, such as heart attack and stroke, as well as serious gastrointestinal bleeding. Patients are advised to consult their physician before taking naproxen, especially if they are also taking other medications.