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Nalfon

Generic Name: fenoprofen (FEN-oh-PROE-fen)
Brand Name: Nalfon

Nalfon is a nonsteroidal anti-inflammatory drug (NSAID). It may cause an increased risk of serious and sometimes fatal heart and blood vessel problems (eg, heart attack, stroke). The risk may be greater if you already have heart problems or if you take Nalfon for a long time. Do not use Nalfon right before or after bypass heart surgery.

Nalfon may cause an increased risk of serious and sometimes fatal stomach ulcers and bleeding. Elderly patients may be at greater risk. This may occur without warning signs.


Nalfon is used for:

Treating rheumatoid arthritis, osteoarthritis, or mild to moderate pain. It may also be used for other conditions as determined by your doctor.

Nalfon 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 Nalfon if:

  • you are allergic to any ingredient in Nalfon
  • you have had a severe allergic reaction (eg, severe rash, hives, trouble breathing, growths in the nose, dizziness) to aspirin or an NSAID (eg, ibuprofen, celecoxib)
  • you have recently had or will be having bypass heart surgery
  • you have severe kidney problems
  • 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.

Video: Treatment Options for Rheumatoid Arthritis

Doctor Ariel D. Teitel discusses several treatments that can help control the progression of the disease and help to alleviate the swelling and pain.

Before using Nalfon:

Some medical conditions may interact with Nalfon. 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 product, 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 hearing problems, poor health, dehydration or low fluid volume, or low blood sodium levels, you drink alcohol, or you have a history of alcohol abuse

Some MEDICINES MAY INTERACT with Nalfon. 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 risk of stomach bleeding may be increased
  • Probenecid because it may increase the risk of Nalfon's side effects
  • Phenobarbital because it may decrease Nalfon's effectiveness
  • 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 Nalfon
  • Angiotensin-converting enzyme (ACE) inhibitors (eg, enalapril) or diuretics (eg, furosemide, hydrochlorothiazide) because their effectiveness may be decreased by Nalfon

This may not be a complete list of all interactions that may occur. Ask your health care provider if Nalfon 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 Nalfon:

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

  • Nalfon comes with an extra patient information sheet called a Medication Guide. Read it carefully. Read it again each time you get Nalfon refilled.
  • Take Nalfon by mouth. It may be taken with food if it upsets your stomach. Taking it with food may not lower the risk of stomach or bowel problems (eg, bleeding, ulcers). Talk with your doctor or pharmacist if you have persistent stomach upset.
  • Take Nalfon with a full glass of water (8 oz/240 mL) as directed by your doctor.
  • If you miss a dose of Nalfon 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 the proper use of Nalfon.

Important safety information:

  • Nalfon may cause dizziness or drowsiness. These effects may be worse if you take it with alcohol or certain medicines. Use Nalfon 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 Nalfon. Taking it in high doses, for a long time, smoking, or drinking alcohol increases the risk of these side effects. Taking Nalfon with food will NOT reduce the risk of these effects. If you have severe stomach or back pain; black, tarry stools; vomit that looks like blood or coffee grounds; or unusual weight gain or swelling, contact your doctor or emergency room right away.
  • Do NOT take more than the recommended dose or use for longer than prescribed without checking with your doctor.
  • Nalfon is an NSAID. Before you start any new medicine, check the label to see if it has an 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 Nalfon unless your doctor tells you to.
  • Nalfon may interfere with certain lab tests. Be sure your doctor and lab personnel know you are taking Nalfon.
  • Lab tests, including kidney function, complete blood cell counts, and blood pressure, may be performed while you use Nalfon. These tests may be used to monitor your condition or check for side effects. Be sure to keep all doctor and lab appointments.
  • Use Nalfon with caution in the ELDERLY; they may be more sensitive to its effects, especially stomach bleeding and kidney problems.
  • Nalfon should be used with extreme caution in CHILDREN younger than 18 years old; safety and effectiveness in these children have not been confirmed.
  • PREGNANCY and BREAST-FEEDING: Nalfon may cause harm to 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 Nalfon while you are pregnant. It is not known if Nalfon is found in breast milk. Do not breast-feed while taking Nalfon.

Possible side effects of Nalfon:

All medicines can 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.

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; decreased hearing; 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.

This is not a complete list of all side effects that may occur. If you have questions about side effects, contact your health care provider. Call your doctor for medical advice about side effects. To report side effects to the appropriate agency, please read the Guide to Reporting Problems to FDA.

If OVERDOSE is suspected:

Contact 1-800-222-1222 (the American Association of Poison Control Centers), your local poison control center, or emergency room immediately. Symptoms may include decreased urination; fast heartbeat; fever; loss of consciousness; seizures; severe dizziness or drowsiness; severe nausea or stomach pain; slow or troubled breathing; tremor; unusual bleeding or bruising; vomit that looks like coffee grounds.

Proper storage of Nalfon:

Store Nalfon at room temperature, between 68 and 77 degrees F (20 and 25 degrees C). Store away from heat, moisture, and light. Do not store in the bathroom. Keep Nalfon out of the reach of children and away from pets.

General information:

  • If you have any questions about Nalfon, please talk with your doctor, pharmacist, or other health care provider.
  • Nalfon is to be used only by the patient for whom it is prescribed. Do not share it with other people.
  • If your symptoms do not improve or if they become worse, check with your doctor.
  • Check with your pharmacist about how to dispose of unused medicine.

This information should not be used to decide whether or not to take Nalfon or any other medicine. Only your health care provider has the knowledge and training to decide which medicines are right for you. This information does not endorse any medicine as safe, effective, or approved for treating any patient or health condition. This is only a brief summary of general information about Nalfon. It does NOT include all information about the possible uses, directions, warnings, precautions, interactions, adverse effects, or risks that may apply to Nalfon. This information is not specific medical advice and does not replace information you receive from your health care provider. You must talk with your healthcare provider for complete information about the risks and benefits of using Nalfon.

Issue Date: September 3, 2014
Database Edition 14.3.1.003
Copyright © 2014 Wolters Kluwer Health, Inc.

Disclaimer: This information should not be used to decide whether or not to take this medicine or any other medicine. Only your health care provider has the knowledge and training to decide which medicines are right for you. This information does not endorse any medicine as safe, effective, or approved for treating any patient or health condition. This is only a brief summary of general information about this medicine. It does NOT include all information about the possible uses, directions, warnings, precautions, interactions, adverse effects, or risks that may apply to this medicine. This information is not specific medical advice and does not replace information you receive from your health care provider. You must talk with your healthcare provider for complete information about the risks and benefits of using this medicine.

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