Drug interactions
Dexamethasone + Netupitant / palonosetron
Severity: Moderate
Dexamethasone 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
Netupitant inhibits CYP3A4 and increases dexamethasone exposure, which is anticipated in antiemetic regimens. Dexamethasone induction is unlikely to significantly reduce netupitant during short antiemetic courses.
What this interaction means in plain words
Dexamethasone 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.
Why it happens
Netupitant inhibits CYP3A4, raising dexamethasone concentrations.
What to do
Reduce the antiemetic dexamethasone dose as recommended in labeling when given with netupitant/palonosetron.
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 Dexamethasone
- Bcg vaccine live + Dexamethasone Contraindicated
- Dexamethasone + Mifepristone Contraindicated
- Dexamethasone + Rilpivirine Contraindicated
- Dexamethasone + Smallpox vaccine live Contraindicated
- Dexamethasone + Varicella virus vaccine live Contraindicated
- Dexamethasone + Yellow fever vaccine Contraindicated
Frequently asked questions
Can I take Dexamethasone with Netupitant / palonosetron?
MediHelp rates the interaction as moderate. Dexamethasone 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. Netupitant inhibits CYP3A4 and increases dexamethasone exposure, which is anticipated in antiemetic regimens. Dexamethasone induction is unlikely to significantly reduce netupitant during short antiemetic courses.
How serious is the interaction between Dexamethasone 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: Reduce the antiemetic dexamethasone dose as recommended in labeling when given with netupitant/palonosetron.
What other medicines interact with Dexamethasone?
MediHelp also lists interactions of Dexamethasone with, for example, Bcg vaccine live, Mifepristone, Rilpivirine. The full list is on the Dexamethasone page.
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