Drug interactions
Efavirenz + Netupitant-palonosetron
Severity: Moderate
Efavirenz and Netupitant-palonosetron: 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
Efavirenz induces CYP3A4 and may lower netupitant exposure, reducing its antiemetic efficacy. Efavirenz is a moderate inducer rather than a strong one, so the effect is unlikely to be extreme. The risk is breakthrough nausea and vomiting.
What this interaction means in plain words
Efavirenz and Netupitant-palonosetron 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.
Efavirenz belongs to Anti Virals; Netupitant-palonosetron belongs to Gastrointestinal Tract.
Why it happens
Efavirenz induces CYP3A4, increasing netupitant clearance.
What to do
Monitor for loss of antiemetic control and add rescue antiemetics if needed. Consider alternatives only if control is inadequate.
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 Netupitant-palonosetron
- Apomorphine + Netupitant-palonosetron Contraindicated
- Flibanserin + Netupitant-palonosetron Contraindicated
- Apalutamide + Netupitant-palonosetron Major
- Avapritinib + Netupitant-palonosetron Major
- Carbamazepine + Netupitant-palonosetron Major
- Cobimetinib + Netupitant-palonosetron Major
Other interactions of Efavirenz
- Cobimetinib + Efavirenz Contraindicated
- Dienogest / estradiol valerate + Efavirenz Contraindicated
- Dihydroergotamine intranasal + Efavirenz Contraindicated
- Dihydroergotamine + Efavirenz Contraindicated
- Doravirine + Efavirenz Contraindicated
- Efavirenz + Elbasvir / grazoprevir Contraindicated
Frequently asked questions
Can I take Efavirenz with Netupitant-palonosetron?
MediHelp rates the interaction as moderate. Efavirenz and Netupitant-palonosetron 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. Efavirenz induces CYP3A4 and may lower netupitant exposure, reducing its antiemetic efficacy. Efavirenz is a moderate inducer rather than a strong one, so the effect is unlikely to be extreme. The risk is breakthrough nausea and vomiting.
How serious is the interaction between Efavirenz and Netupitant-palonosetron?
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 loss of antiemetic control and add rescue antiemetics if needed. Consider alternatives only if control is inadequate.
What other medicines interact with Netupitant-palonosetron?
MediHelp also lists interactions of Netupitant-palonosetron with, for example, Apomorphine, Flibanserin, Apalutamide. The full list is on the Netupitant-palonosetron page.
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