Treating rheumatoid arthritis, osteoarthritis, ankylosing spondylitis, and juvenile arthritis. It is used to treat tendonitis, bursitis, gout, menstrual cramps, or mild to moderate pain. It may also be used for other conditions as determined by your doctor.

Naproxen is an NSAID. Exactly how it works is not known. It may block certain substances in the body that are linked to inflammation. NSAIDs treat the symptoms of pain and inflammation. They do not treat the disease that causes those symptoms.

Do NOT use Naproxen if:

• you are allergic to any ingredient in Naproxen
• you have had a severe allergic reaction (eg, severe rash, hives, trouble breathing, growths in the nose, dizziness) to aspirin or a nonsteroidal anti-inflammatory drug (NSAID) (eg, ibuprofen, celecoxib)
• you have recently had or will be having bypass heart surgery
• you are in the last 3 months of pregnancy

Contact your doctor or health care provider right away if any of these apply to you.

Before using Naproxen :

Some medical conditions may interact with Naproxen. Tell your doctor or pharmacist if you have any medical conditions, especially if any of the following apply to you:

• if you are pregnant, planning to become pregnant, or are breast-feeding
• if you are taking any prescription or nonprescription medicine, herbal preparation, or dietary supplement
• if you have allergies to medicines, foods, or other substances
• if you have a history of kidney or liver disease, diabetes, or stomach or bowel problems (eg, bleeding, perforation, ulcers)
• if you have a history of swelling or fluid buildup, asthma, growths in the nose (nasal polyps), or mouth inflammation
• if you have high blood pressure, blood disorders, bleeding or clotting problems, heart problems (eg, heart failure), or blood vessel disease, or if you are at risk for any of these diseases
• if you have poor health, dehydration or low fluid volume, or low blood sodium levels, you are on a low salt (sodium) diet, you drink alcohol, or you have a history of alcohol abuse

Some MEDICINES MAY INTERACT with Naproxen. Tell your health care provider if you are taking any other medicines, especially any of the following:

• Anticoagulants (eg, warfarin), aspirin, corticosteroids (eg, prednisone), heparin, or selective serotonin reuptake inhibitors (SSRIs) (eg, fluoxetine) because the risk of stomach bleeding may be increased
• Probenecid because it may increase the risk of Naproxen 's side effects
• Cyclosporine, hydantoins (eg, phenytoin), lithium, methotrexate, quinolones (eg, ciprofloxacin), sulfonamides (eg, sulfamethoxazole), or sulfonylureas (eg, glipizide) because the risk of their side effects may be increased by Naproxen
• Angiotensin-converting enzyme (ACE) inhibitors (eg, enalapril), beta-blockers (eg, propranolol), or diuretics (eg, furosemide, hydrochlorothiazide) because their effectiveness may be decreased by Naproxen

This may not be a complete list of all interactions that may occur. Ask your health care provider if Naproxen may interact with other medicines that you take. Check with your health care provider before you start, stop, or change the dose of any medicine.

How to use Naproxen :

Use Naproxen as directed by your doctor. Check the label on the medicine for exact dosing instructions.

• Naproxen comes with an extra patient information sheet called a Medication Guide. Read it carefully. Read it again each time you get Naproxen refilled.
• Take Naproxen by mouth. It may be taken with food if it upsets your stomach. Taking it with food may not lower the risk of stomach of bowel problems (eg, bleeding, ulcers). Talk with your doctor or pharmacist if you have persistent stomach upset.
• Take Naproxen with a full glass of water (8 oz/240 mL) as directed by your doctor.
• If you take antacids, cholestyramine, or sucralfate, ask your doctor or pharmacist how to take them with Naproxen.
• If you miss a dose of Naproxen and you are taking it regularly, take it as soon as possible. If it is almost time for your next dose, skip the missed dose. Go back to your regular dosing schedule. Do not take 2 doses at once.

Ask your health care provider any questions you may have about how to use Naproxen.

Important safety information:

• Naproxen may cause dizziness or drowsiness. These effects may be worse if you take it with alcohol or certain medicines. Use Naproxen with caution. Do not drive or perform other possibly unsafe tasks until you know how you react to it.
• Serious stomach ulcers or bleeding can occur with the use of Naproxen. Taking it in high doses or for a long time, smoking, or drinking alcohol increases the risk of these side effects. Taking Naproxen with food will NOT reduce the risk of these effects. Contact your doctor or emergency room at once if you develop severe stomach or back pain; black, tarry stools; vomit that looks like blood or coffee grounds; or unusual weight gain or swelling.
• Do NOT take more than the recommended dose or use for longer than prescribed without checking with your doctor.
• Naproxen has naproxen in it. Before you start any new medicine, check the label to see if it has naproxen or any other NSAID (eg, ibuprofen) in it too. If it does or if you are not sure, check with your doctor or pharmacist.
• Do not take aspirin while you are using Naproxen unless your doctor tells you to.
• Do not switch between different forms of Naproxen (eg, tablets, suspension) unless your doctor tells you to. They may not provide the same amount of medicine to your body.
• Naproxen may interfere with certain lab tests. Be sure your doctor and lab personnel know that you take Naproxen.
• Lab tests including kidney function, complete blood cell counts, and blood pressure, may be performed while you use Naproxen. These tests may be used to monitor your condition or check for side effects. Be sure to keep all doctor and lab appointments.
• Use Naproxen with caution in the ELDERLY; they may be more sensitive to its effects, especially stomach bleeding and kidney problems.
• Naproxen should be used with extreme caution in CHILDREN younger than 2 years old; safety and effectiveness in these children have not been confirmed.
• PREGNANCY and BREAST-FEEDING: Naproxen may harm the fetus. Do not use it during the last 3 months of pregnancy. If you think you may be pregnant, contact your doctor. You will need to discuss the benefits and risks of using Naproxen while you are pregnant. Naproxen should not be used during labor. Naproxen is found in breast milk. Do not breast-feed while taking Naproxen.

Possible side effects of Naproxen :

All medicines may cause side effects, but many people have no, or minor, side effects. Check with your doctor if any of these most COMMON side effects persist or become bothersome:

Constipation; diarrhea; dizziness; drowsiness; gas; headache; heartburn; nausea; stomach upset; stuffy nose.

Seek medical attention right away if any of these SEVERE side effects occur:

Severe allergic reactions (rash; hives; itching; trouble breathing; tightness in the chest; swelling of the mouth, face, lips, or tongue); bloody or black, tarry stools; change in the amount of urine produced; chest pain; confusion; dark urine; depression; fainting; fast or irregular heartbeat; fever, chills, or persistent sore throat; mental or mood changes; numbness of an arm or leg; one-sided weakness; red, swollen, blistered, or peeling skin; ringing in the ears; seizures; severe headache or dizziness; severe or persistent stomach pain or nausea; severe vomiting; shortness of breath; sudden or unexplained weight gain; swelling of hands, legs, or feet; unusual bruising or bleeding; unusual joint or muscle pain; unusual tiredness or weakness; vision or speech changes; vomit that looks like coffee grounds; yellowing of the skin or eyes.