Naproxen is used to relieve pain from various conditions such as headache, muscle aches, tendonitis, dental pain, and menstrual cramps. It also reduces pain, swelling, and joint stiffness caused by arthritis, bursitis, and gout attacks. This medication is known as a nonsteroidal anti-inflammatory drug (NSAID). It works by blocking your body's production of certain natural substances that cause inflammation.

If you are treating a chronic condition such as arthritis, ask your doctor about non-drug treatments and/or using other medications to treat your pain.

Check the ingredients on the label even if you have used the product before. The manufacturer may have changed the ingredients. Also, products with similar names may contain different ingredients meant for different purposes. Taking the wrong product could harm you.

It is very important that your doctor check your progress at regular visits. This will allow your doctor to see if the medicine is working properly and to decide if you should continue to take it. Blood and urine tests may be needed to check for unwanted effects.

Naproxen may raise your risk of having a heart attack or stroke. This is more likely in people who already have heart disease. People who use naproxen for a long time might also have a higher risk.

Naproxen may cause bleeding in your stomach or intestines. This problem can happen without warning signs. This is more likely if you have had a stomach ulcer in the past, if you smoke or drink alcohol regularly, if you are over 60 years of age, are in poor health, or are using certain other medicines (such as a steroid or a blood thinner).

Check with your doctor right away if you have pain or tenderness in the upper stomach, pale stools, dark urine, loss of appetite, nausea, vomiting, or yellow eyes or skin. These could be symptoms of a serious liver problem.

Serious skin reactions can occur during treatment with naproxen. Check with your doctor right away if you have any of the following symptoms while taking naproxen: blistering, peeling, or loose skin, chills, cough, diarrhea, fever, itching, joint or muscle pain, red skin lesions, sore throat, sores, ulcers, or white spots in the mouth or on the lips, or unusual tiredness or weakness.

Possible warning signs of some serious side effects that can occur during treatment with naproxen may include swelling of the face, fingers, feet, or lower legs, severe stomach pain, black, tarry stools, or vomiting of blood or material that looks like coffee grounds, unusual weight gain, yellow skin or eyes, decreased urination, unusual bleeding or bruising, or skin rash. Also, signs of serious heart problems could occur such as chest pain, tightness in the chest, fast or irregular heartbeat, unusual flushing or warmth of the skin, weakness, or slurring of speech. Check with your doctor immediately if you notice any of these warning signs.

Naproxen may also cause a serious type of allergic reaction called anaphylaxis. Although this is rare, it may occur more often in patients who are allergic to aspirin or to any of the nonsteroidal anti-inflammatory drugs. Anaphylaxis can be life-threatening and requires immediate medical attention. The most serious signs of this reaction are very fast or irregular breathing, gasping for breath, or fainting. Other signs may include changes in color of the skin of the face, very fast but irregular heartbeat or pulse, hive-like swellings on the skin, and puffiness or swellings of the eyelids or around the eyes. If these effects occur, get emergency help at once.

Using naproxen during the later part of a pregnancy can harm your unborn baby. If you think you have become pregnant while using the medicine, tell your doctor right away.

Naproxen may cause a delay in ovulation for women and may affect their ability to have children. If you plan to have children, talk with your doctor before using naproxen.

Check with your doctor immediately if blurred vision, difficulty with reading, or any other change in vision occurs during or after your treatment. Your doctor may want you to have your eyes checked by an ophthalmologist (eye doctor).

Before having any kind of surgery or medical tests, tell your doctor that you are taking naproxen. It may be necessary for you to stop treatment for a while, or to change to a different nonsteroidal anti-inflammatory drug before your procedure.

Naproxen may cause some people to become dizzy, lightheaded, drowsy, or less alert than they are normally. Even if taken at bedtime, it may cause some people to feel drowsy or less alert on arising. Make sure you know how you react to naproxen before you drive, use machines, or do anything else that could be dangerous if you are not alert. .

Do not take other medicines unless they have been discussed with your doctor. This includes prescription or nonprescription (over-the-counter [OTC]) medicines and herbal or vitamin supplements.

It is very important that your doctor check your progress at regular visits. This will allow your doctor to see if the medicine is working properly and to decide if you should continue to take it. Blood and urine tests may be needed to check for unwanted effects.

Naproxen may raise your risk of having a heart attack or stroke. This is more likely in people who already have heart disease. People who use naproxen for a long time might also have a higher risk.

Naproxen may cause bleeding in your stomach or intestines. This problem can happen without warning signs. This is more likely if you have had a stomach ulcer in the past, if you smoke or drink alcohol regularly, if you are over 60 years of age, are in poor health, or are using certain other medicines (such as a steroid or a blood thinner).

Check with your doctor right away if you have pain or tenderness in the upper stomach, pale stools, dark urine, loss of appetite, nausea, vomiting, or yellow eyes or skin. These could be symptoms of a serious liver problem.

Serious skin reactions can occur during treatment with naproxen. Check with your doctor right away if you have any of the following symptoms while taking naproxen: blistering, peeling, or loose skin, chills, cough, diarrhea, fever, itching, joint or muscle pain, red skin lesions, sore throat, sores, ulcers, or white spots in the mouth or on the lips, or unusual tiredness or weakness.

Possible warning signs of some serious side effects that can occur during treatment with naproxen may include swelling of the face, fingers, feet, or lower legs, severe stomach pain, black, tarry stools, or vomiting of blood or material that looks like coffee grounds, unusual weight gain, yellow skin or eyes, decreased urination, unusual bleeding or bruising, or skin rash. Also, signs of serious heart problems could occur such as chest pain, tightness in the chest, fast or irregular heartbeat, unusual flushing or warmth of the skin, weakness, or slurring of speech. Check with your doctor immediately if you notice any of these warning signs.

Naproxen may also cause a serious type of allergic reaction called anaphylaxis. Although this is rare, it may occur more often in patients who are allergic to aspirin or to any of the nonsteroidal anti-inflammatory drugs. Anaphylaxis can be life-threatening and requires immediate medical attention. The most serious signs of this reaction are very fast or irregular breathing, gasping for breath, or fainting. Other signs may include changes in color of the skin of the face, very fast but irregular heartbeat or pulse, hive-like swellings on the skin, and puffiness or swellings of the eyelids or around the eyes. If these effects occur, get emergency help at once.

Using naproxen during the later part of a pregnancy can harm your unborn baby. If you think you have become pregnant while using the medicine, tell your doctor right away.

Naproxen may cause a delay in ovulation for women and may affect their ability to have children. If you plan to have children, talk with your doctor before using naproxen.

Check with your doctor immediately if blurred vision, difficulty with reading, or any other change in vision occurs during or after your treatment. Your doctor may want you to have your eyes checked by an ophthalmologist (eye doctor).

Before having any kind of surgery or medical tests, tell your doctor that you are taking naproxen. It may be necessary for you to stop treatment for a while, or to change to a different nonsteroidal anti-inflammatory drug before your procedure.

Naproxen may cause some people to become dizzy, lightheaded, drowsy, or less alert than they are normally. Even if taken at bedtime, it may cause some people to feel drowsy or less alert on arising. Make sure you know how you react to naproxen before you drive, use machines, or do anything else that could be dangerous if you are not alert. .

Do not take other medicines unless they have been discussed with your doctor. This includes prescription or nonprescription (over-the-counter [OTC]) medicines and herbal or vitamin supplements.

Check with your doctor immediately if any of the following side effects occur:

More common:

• Belching
• bruising
• difficult or labored breathing
• feeling of indigestion
• headache
• itching skin
• large, flat, blue, or purplish patches in the skin
• pain in the chest below the breastbone
• skin eruptions
• stomach pain
• swelling
• tightness in the chest

Less common:

• Bloating
• bloody or black, tarry stools
• blurred or loss of vision
• burning upper abdominal or stomach pain
• cloudy urine
• constipation
• decrease in urine output or decrease in urine-concentrating ability
• disturbed color perception
• double vision
• fast, irregular, pounding, or racing heartbeat or pulse
• halos around lights
• indigestion
• loss of appetite
• nausea or vomiting
• night blindness
• overbright appearance of lights
• pale skin
• pinpoint red or purple spots on the skin
• severe and continuing nausea
• severe stomach burning, cramping, or pain
• skin rash
• swelling or inflammation of the mouth
• troubled breathing with exertion
• tunnel vision
• unusual bleeding or bruising
• unusual tiredness or weakness
• vomiting of material that looks like coffee grounds
• weight loss

Other side effects not listed may also occur in some patients. If you notice any other effects, check with your healthcare professional.

How should I use this medicine?

Take this medicine by mouth with a glass of water. Follow the directions on the prescription label. Take it with food if your stomach gets upset. Try to not lie down for at least 10 minutes after you take it. Take your medicine at regular intervals. Do not take your medicine more often than directed. Long-term, continuous use may increase the risk of heart attack or stroke.

A special MedGuide will be given to you by the pharmacist with each prescription and refill. Be sure to read this information carefully each time.

Talk to your pediatrician regarding the use of this medicine in children. Special care may be needed.

What if I miss a dose?

If you miss a dose, take it as soon as you can. If it is almost time for your next dose, take only that dose. Do not take double or extra doses.

What should I watch for while using this medicine?

Tell your doctor or health care professional if your pain does not get better. Talk to your doctor before taking another medicine for pain. Do not treat yourself.

This medicine does not prevent heart attack or stroke. In fact, this medicine may increase the chance of a heart attack or stroke. The chance may increase with longer use of this medicine and in people who have heart disease. If you take aspirin to prevent heart attack or stroke, talk with your doctor or health care professional.

Do not take other medicines that contain aspirin, ibuprofen, or naproxen with this medicine. Side effects such as stomach upset, nausea, or ulcers may be more likely to occur. Many medicines available without a prescription should not be taken with this medicine.

This medicine can cause ulcers and bleeding in the stomach and intestines at any time during treatment. Do not smoke cigarettes or drink alcohol. These increase irritation to your stomach and can make it more susceptible to damage from this medicine. Ulcers and bleeding can happen without warning symptoms and can cause death.

You may get drowsy or dizzy. Do not drive, use machinery, or do anything that needs mental alertness until you know how this medicine affects you. Do not stand or sit up quickly, especially if you are an older patient. This reduces the risk of dizzy or fainting spells.

This medicine can cause you to bleed more easily. Try to avoid damage to your teeth and gums when you brush or floss your teeth.