It is very important that your doctor check you at regular visits to make sure that this medicine is working properly. Blood tests will be needed to check for any unwanted effects that may be caused by this medicine.
Women and children should not use this medicine. Pregnant women or women who may become pregnant should not handle or touch the tablets without protection (e.g., gloves). This medicine may also cause birth defects if the father is using it when his sexual partner becomes pregnant. You must use a condom and another effective method of birth control during and for 1 week after the last dose of abiraterone. If a pregnancy occurs while you are using this medicine, tell your doctor right away.
You will also need to have your blood pressure measured before starting this medicine and while you are using it. If you notice any change to your recommended blood pressure, call your doctor right away. If you have questions about this, talk to your doctor.
Do not interrupt or stop using this medicine together with prednisone without asking your doctor. This may increase your risk of having adrenal gland problems. Talk to your doctor if you have more than one of these symptoms while you are using this medicine: darkening of the skin, diarrhea, dizziness, fainting, loss of appetite, mental depression, nausea, skin rash, unusual tiredness or weakness, or vomiting.
Check with your doctor right away if you have pain or tenderness in the upper stomach, pale stools, dark urine, loss of appetite, nausea, unusual tiredness or weakness, or yellow eyes or skin. These could be symptoms of a serious liver problem.
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.