Drug interactions
Ethotoin + Vincristine
Severity: Moderate
Ethotoin and Vincristine: 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
Cytotoxic chemotherapy regimens that include vincristine can lower plasma levels of hydantoin anticonvulsants, risking breakthrough seizures. Ethotoin data are limited and the effect is extrapolated from phenytoin.
What this interaction means in plain words
Ethotoin and Vincristine 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
Reduced absorption of the anticonvulsant and possibly altered metabolism during chemotherapy; mechanism not firmly established for ethotoin.
What to do
Monitor seizure control and, where possible, anticonvulsant levels during chemotherapy. Adjust the ethotoin dose or switch to a non-interacting antiseizure drug if control worsens.
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 Vincristine
- Adenovirus types 4 and 7 live + Vincristine Contraindicated
- Apalutamide + Vincristine Major
- Atazanavir + Vincristine Major
- Ceritinib + Vincristine Major
- Chloramphenicol + Vincristine Major
- Clarithromycin + Vincristine Major
Frequently asked questions
Can I take Ethotoin with Vincristine?
MediHelp rates the interaction as moderate. Ethotoin and Vincristine 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. Cytotoxic chemotherapy regimens that include vincristine can lower plasma levels of hydantoin anticonvulsants, risking breakthrough seizures. Ethotoin data are limited and the effect is extrapolated from phenytoin.
How serious is the interaction between Ethotoin and Vincristine?
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 seizure control and, where possible, anticonvulsant levels during chemotherapy. Adjust the ethotoin dose or switch to a non-interacting antiseizure drug if control worsens.
What other medicines interact with Vincristine?
MediHelp also lists interactions of Vincristine with, for example, Adenovirus types 4 and 7 live, Apalutamide, Atazanavir. The full list is on the Vincristine page.
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