Drug interactions
Aprepitant + Rifabutin
Severity: Moderate
Aprepitant and Rifabutin: moderate interaction.
Last updated
For healthcare professionals — reference only. This page is a brief summary, not medical advice and not a substitute for official labeling or clinical judgement. Always verify before prescribing or dispensing.
Summary
Rifabutin induces CYP3A4 and can lower aprepitant levels, so antiemetic protection may be reduced. The effect is smaller than with rifampin.
What this interaction means in plain words
Aprepitant and Rifabutin can affect each other. The combination is often manageable, but it may need a change of dose, a change of timing, or extra checks while both are taken.
Aprepitant belongs to Gastrointestinal Tract; Rifabutin belongs to Anti Bacterial.
Why it happens
Induction of CYP3A4 by rifabutin increases aprepitant metabolism.
What to do
Monitor for breakthrough nausea and vomiting and add other antiemetics as needed.
What to ask your pharmacist
- Should I take them at different times of day?
- Does the dose of either medicine need to change?
- Is there anything I should avoid, such as alcohol or certain foods, while on both?
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Other interactions of Aprepitant
- Aprepitant + Lomitapide Contraindicated
- Aprepitant + Pimozide Contraindicated
- Aprepitant + Avapritinib Major
- Aprepitant + Bosutinib Major
- Aprepitant + Carbamazepine Major
- Aprepitant + Cobicistat Major
Other interactions of Rifabutin
- Cabotegravir + Rifabutin Contraindicated
- Lorlatinib + Rifabutin Contraindicated
- Rifabutin + Voriconazole Contraindicated
- Apixaban + Rifabutin Major
- Axitinib + Rifabutin Major
- Brexpiprazole + Rifabutin Major
Frequently asked questions
Can I take Aprepitant with Rifabutin?
MediHelp rates the interaction as moderate. Aprepitant and Rifabutin can affect each other. The combination is often manageable, but it may need a change of dose, a change of timing, or extra checks while both are taken. Rifabutin induces CYP3A4 and can lower aprepitant levels, so antiemetic protection may be reduced. The effect is smaller than with rifampin.
How serious is the interaction between Aprepitant and Rifabutin?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Monitor for breakthrough nausea and vomiting and add other antiemetics as needed.
What other medicines interact with Aprepitant?
MediHelp also lists interactions of Aprepitant with, for example, Lomitapide, Pimozide, Avapritinib. The full list is on the Aprepitant page.
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