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Flanax
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Flanax Pain Reliever Tablets

Generic name:naproxen sodium
Drug class:Nonsteroidal anti-inflammatory drugs

Medically reviewed by Sanjai Sinha, MD. Last updated on Mar 28, 2022.

What is Flanax?

Flanax Pain Reliever Tablets contain naproxen sodium. Naproxen is a nonsteroidal anti-inflammatory drug (NSAID).

Flanax is used to treat minor aches and pains such as headache, back pain or toothache.

Flanax Pain Reliever Tablets can also be used to treat pain associated with a common cold and certain symptoms of arthritis and menstrual cramps.

Before taking this medicine

You should not take Flanax Pain Reliever Tablets when you:

  • Are age 65 or older
  • Have had stomach ulcers or bleeding problems
  • Take a blood thinning (anticoagulant) or steroid drug
  • Take other drugs containing an NSAID (aspirin, ibuprofen, naproxen, or others)
  • Have three or more alcoholic drinks every day while using this product
  • Have ever had an allergic reaction to any other pain reliever/fever reducer
  • Are about to receive heart surgery or recently received one

How should I take Flanax Pain Reliever Tablets?

  • For adults and children 12 years and older, take one Flanax tablet every 8 to 12 hours while symptoms last. For the first dose you may take two tablets within the first hour.
  • Do not exceed two Flanax Pain Reliever Tablets in any 8 to 12 hour period.
  • Do not exceed three tablets in a 24-hour period.
  • Adults over 65 years old cannot take more than one Flanax tablet every 12 hours unless directed by a doctor.
  • For using Flanax Pain Reliever with children under 12 years old, always ask a doctor first.

Flanax side effects

Get emergency medical help if you have any of these signs of an allergic reaction to Flanax: hives; difficulty breathing; swelling of your face, lips, tongue, or throat.

Stop taking Flanax and seek medical attention or call your doctor at once if you have any of these serious side effects:

  • chest pain, weakness, shortness of breath, slurred speech, problems with vision or balance;

  • black, bloody, or tarry stools;

  • coughing up blood or vomit that looks like coffee grounds;

  • swelling or rapid weight gain;

  • urinating less than usual or ...