It is very important that your doctor check the progress of you or your child at regular visits. This will allow your doctor to see if this medicine is working properly and to decide if you should continue to take it. Blood and other laboratory tests may be needed to check for unwanted effects. If your or your child's condition does not improve, or if it becomes worse, discuss this with your doctor.
This medicine is sometimes given together with other medicines to treat ulcers. Be sure you understand about the risks and proper use of any other medicine your doctor gives you together with rabeprazole. If you or your child are using this medicine with clarithromycin, do not use it with cisapride (Propulsid®) or pimozide (Orap®).
This medicine may cause a serious type of allergic reaction when used in patients treated with antibiotics (e.g., amoxicillin). Call your doctor right away if you or your child have trouble breathing or swallowing; or any swelling of your hands, face, or mouth while you or your child are using this medicine.
Serious stomach conditions may occur while taking this medicine alone or with antibiotics. Stop using this medicine and check with your doctor immediately if you or your child are having more than one of these symptoms: abdominal or stomach cramps, bloated feeling, watery and severe diarrhea which may also be bloody sometimes, fever, nausea or vomiting, or unusual tiredness or weakness.
This medicine may increase your risk of having fractures of the hip, wrist, and spine. This is more likely if you are 50 years of age and older, if you receive high doses of this medicine or use it for one year or more.
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 one year, or if you are taking this medicine together with digoxin (Lanoxin®) or certain diuretics or "water pills". Stop using this medicine and check with your doctor right away if you have convulsions (seizures); fast, racing, or uneven heartbeat; muscle spasms (tetany); tremors; or unusual tiredness or weakness.
Do not stop taking this medicine without first checking with your doctor, or unless told to do so by your doctor.
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.