How the interaction occurs:
When these two medicines are taken together, your body may not process your heart medicine properly.
What might happen:
The blood level of your heart medicine may decrease and it may not work as well.
What you should do about this interaction:
Let your healthcare professionals (e.g. doctor or pharmacist) know that you are taking these medicines together. You doctor may want to monitor you more closely while you are taking rifampin, rifabutin or rifapentine with your heart medicine to make sure it is still working for you. The dose of your heart medicine may need to be adjusted after you start or stop rifampin, rifabutin or rifapentine.If you experience a fast or irregular heartbeat, or feel like you might faint, contact your doctor.Your healthcare professionals (e.g. doctor or pharmacist) may already be aware of this drug interaction and may be monitoring you for it. Do not start, stop, or change the dosage of any medicine before checking with them first.
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