Sometimes it is not safe to use certain medications at the same time. Some drugs can affect your blood levels of other drugs you take, which may increase side effects or make the medications less effective.
Tell your doctor about all your other prostate cancer medicines, especially radium Ra 223 (Xofigo).
Other drugs may interact with abiraterone, including prescription and over-the-counter medicines, vitamins, and herbal products. Tell your doctor about all your current medicines and any medicine you start or stop using.
 Zytiga drug interactions (more detail)
