It is important that your doctor check the progress of you or your child 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 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.
Lansoprazole may increase your risk of having fractures of the hip, wrist, and spine. This is more likely if you have osteoporosis, 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). This is more likely to occur 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.
Check with your doctor right away if you have watery stool that does not go away, stomach pain, and fever while taking this medicine.
Do not stop taking this medicine without first checking with your doctor, or unless told to do so by your doctor.
Before you have any medical tests, tell the medical doctor in charge that you or your child are taking this medicine. The results of some tests may be affected by this medicine.
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.