Drug interactions
Aprepitant + Olaparib
Severity: Major
Aprepitant and Olaparib: major 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
Aprepitant is a moderate CYP3A4 inhibitor and can raise olaparib plasma concentrations. Higher exposure may increase olaparib toxicities such as anemia, nausea and fatigue.
What this interaction means in plain words
Aprepitant and Olaparib can interact in a way that may be serious. Using them together is sometimes necessary, but it needs a deliberate decision by the prescriber, a plan for monitoring, and clear advice on the warning signs to watch for.
Aprepitant belongs to Gastrointestinal Tract; Olaparib belongs to Oncology.
Why it happens
Aprepitant inhibits CYP3A4-mediated metabolism of olaparib, increasing its exposure.
What to do
Avoid the combination if possible; if it is required, reduce the olaparib dose as stated in its labeling for moderate CYP3A inhibitors. Monitor for hematologic toxicity and GI effects.
What to ask your pharmacist
- Does the benefit of taking both outweigh the risk in my case?
- Do I need any blood test, ECG or other check while on both?
- What early warning signs should I watch for, and what should I do if they appear?
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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 Olaparib
- Amiodarone + Olaparib Major
- Amobarbital + Olaparib Major
- Apalutamide + Olaparib Major
- Azathioprine + Olaparib Major
- Carbamazepine + Olaparib Major
- Carboplatin + Olaparib Major
Frequently asked questions
Can I take Aprepitant with Olaparib?
MediHelp rates the interaction as major. Aprepitant and Olaparib can interact in a way that may be serious. Using them together is sometimes necessary, but it needs a deliberate decision by the prescriber, a plan for monitoring, and clear advice on the warning signs to watch for. Aprepitant is a moderate CYP3A4 inhibitor and can raise olaparib plasma concentrations. Higher exposure may increase olaparib toxicities such as anemia, nausea and fatigue.
How serious is the interaction between Aprepitant and Olaparib?
MediHelp rates it major, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Avoid the combination if possible; if it is required, reduce the olaparib dose as stated in its labeling for moderate CYP3A inhibitors. Monitor for hematologic toxicity and GI effects.
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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