Drug interactions
Docetaxel + Ethotoin
Severity: Moderate
Docetaxel and Ethotoin: 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
Ethotoin is a hydantoin anticonvulsant related to phenytoin, and phenytoin-type drugs can induce CYP3A4. This could lower docetaxel exposure and efficacy. The legacy claim that docetaxel lowers ethotoin levels is poorly supported.
What this interaction means in plain words
Docetaxel and Ethotoin 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
Possible CYP3A4 induction by the hydantoin anticonvulsant, extrapolated from phenytoin, which may increase docetaxel clearance.
What to do
Use a non-enzyme-inducing anticonvulsant if possible. Otherwise monitor for reduced docetaxel response and for seizure control.
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 Docetaxel
Frequently asked questions
Can I take Docetaxel with Ethotoin?
MediHelp rates the interaction as moderate. Docetaxel and Ethotoin 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. Ethotoin is a hydantoin anticonvulsant related to phenytoin, and phenytoin-type drugs can induce CYP3A4. This could lower docetaxel exposure and efficacy. The legacy claim that docetaxel lowers ethotoin levels is poorly supported.
How serious is the interaction between Docetaxel and Ethotoin?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Use a non-enzyme-inducing anticonvulsant if possible. Otherwise monitor for reduced docetaxel response and for seizure control.
What other medicines interact with Docetaxel?
MediHelp also lists interactions of Docetaxel with, for example, Adenovirus types 4 and 7 live, Atazanavir, Belatacept. The full list is on the Docetaxel page.
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