It is very important that your doctor check your or your child’s progress at regular visits to see if the medicine is working properly and to decide if you should continue to take it. Blood, urine, and other laboratory tests may be needed to check for unwanted effects.
Do not use this medicine together with medicines containing rilpivirine (Complera®, Edurant®, Odefsey®).
Naproxen may increase your risk of having a heart attack or stroke. This is more likely in people who already have heart disease. People who use this medicine for a long time might also have a higher risk. Get emergency help right away if you have any symptoms of a heart attack or stroke. Some possible symptoms are chest pain or discomfort, uneven heartbeat, pain that spreads to your arm or jaw, unusual sweating, feeling faint, trouble breathing, slurred speech, or weakness on one side of your body.
Naproxen may cause bleeding in your stomach or bowels. 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 (eg, steroids or a blood thinner).
This medicine may cause a serious type of allergic reaction, called anaphylaxis, which can be life-threatening and requires immediate medical attention. Call your doctor right away if you or your child have a rash, itching, hoarseness, trouble breathing, trouble swallowing, or any swelling of your hands, face, or mouth while you are using this medicine.
Serious skin reactions, including exfoliative dermatitis, Stevens-Johnson syndrome, toxic epidermal necrolysis, and drug reaction with eosinophilia and systemic symptoms (DRESS) can occur with this medicine. Check with your doctor right away if you or your child have black, tarry stools, blistering, peeling, or loosening of the skin, chest pain, chills, cough, diarrhea, fever, itching, joint or muscle pain, painful or difficult urination, red skin lesions, sore throat, sores, ulcers, or white spots in the mouth or on the lips, swollen glands, unusual bleeding or bruising, or unusual tiredness or weakness.
Using this medicine during the later part of a pregnancy can harm your unborn baby. If you think you have become pregnant while using this medicine, tell your doctor right away.
Check with your doctor right away if you or your child have any symptoms of liver problems including dark-colored urine or pale stools, nausea, vomiting, loss of appetite, pain in your upper stomach, or yellowing of your skin or eyes.
If you or your child are rapidly gaining weight, having chest pain or discomfort, extreme tiredness or weakness, irregular breathing, irregular heartbeat, or excessive swelling of the hands, wrist, ankles, or feet, check with your doctor immediately. These may be symptoms of heart problems or your body keeping too much water.
This medicine may cause kidney problems. Tell your doctor right away if you or your child has blood in the urine, decreased urine output, confusion, dizziness, headache, muscle twitching, rapid weight gain, swelling of your face, ankles, or hands, or unusual tiredness or weakness.
Hyperkalemia (high potassium in the blood) may occur while you are using this medicine. Call your doctor right away if you have confusion, nausea or vomiting, weakness or heaviness of the legs, uneven heartbeat, trouble breathing, numbness or tingling in your hands, feet, or lips.
Check with your doctor right away if you or your child has a change in frequency of urination or amount of urine, blood in the urine, fever, joint pain, loss of appetite, skin rash, swelling of the body, feet, or ankles, unusual tiredness or weakness, or unusual weight gain after using this medicine. These could be symptoms of acute tubulointerstitial nephritis.
Taking this medicine for a long time may make it harder for your body to absorb vitamin B12. Tell your doctor if you have concerns about vitamin B12 deficiency.
This medicine may cause hypomagnesemia (low magnesium in the blood). Your doctor may want to check your blood levels if you are taking this medicine for more than 1 year, or if you are taking this medicine together with digoxin (Lanoxin®) or certain diuretics or “water pills”. Check with your doctor right away if you have seizures, fast, racing, or uneven heartbeat, muscle spasms (tetany), tremors, or unusual tiredness or weakness.
Check with your doctor right away if you or your child has watery stool that does not go away, stomach pain, and fever while using this medicine.
Cutaneous or systemic lupus erythematosus may occur or get worse in patients receiving a PPI. Call your doctor right away if you or your child has joint pain or a skin rash on your cheeks or arms that gets worse when exposed to the sun.
This medicine may increase your risk for fundic gland polyps (abnormal tissue growth in the upper part of your stomach). This is more likely if you are receiving this medicine for more than 1 year. Talk to your doctor if you have concerns.
Do not stop taking this medicine without first checking with your doctor, or unless told to do so by your doctor.
This medicine 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 this medicine.
Before having any kind of surgery or medical tests, tell your doctor that you are using this medicine. It may be necessary for you to stop the medicine for a while, or to change to a different medicine before your procedure.
Do not take other medicines unless they have been discussed with your doctor. This includes prescription (eg, atazanavir, nelfinavir, Reyataz®, Viracept®) or nonprescription (over-the-counter [OTC]) medicines and herbal (eg, St John’s wort) or vitamin supplements.