Serious. These medicines may interact and cause very harmful effects. Contact your healthcare professional (e.g. doctor or pharmacist) for more information.
How the interaction occurs:
When these two medicines are taken together, your body may not process them properly.
What might happen:
Your blood levels of rifabutin may increase and cause harmful effects. Rifabutin and rifapentine may decrease the levels of some protease inhibitors, which may decrease their effectiveness.
What you should do about this interaction:
Make sure that your healthcare professionals (e.g. doctor or pharmacist) know that you are taking these medicines together. If you experience a persistent sore throat or fever, contact your doctor. The dose of your medicines may need adjusting.Your healthcare professionals 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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