Drug interactions
Carbamazepine + Ethotoin
Severity: Moderate
Carbamazepine 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
Carbamazepine may lower ethotoin concentrations, with a risk of losing seizure control. Effects on carbamazepine levels may also occur, as with other hydantoins.
What this interaction means in plain words
Carbamazepine 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
Carbamazepine induces hepatic enzymes that metabolize ethotoin; the exact pathway is not well characterized.
What to do
Monitor seizure frequency and ethotoin and carbamazepine concentrations. Adjust doses when either drug is started or stopped.
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 Carbamazepine
- Artemether / lumefantrine + Carbamazepine Contraindicated
- Cabotegravir + Carbamazepine Contraindicated
- Carbamazepine + Delamanid Contraindicated
- Carbamazepine + Dienogest / estradiol valerate Contraindicated
- Carbamazepine + Doravirine Contraindicated
- Carbamazepine + Elbasvir / grazoprevir Contraindicated
Frequently asked questions
Can I take Carbamazepine with Ethotoin?
MediHelp rates the interaction as moderate. Carbamazepine 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. Carbamazepine may lower ethotoin concentrations, with a risk of losing seizure control. Effects on carbamazepine levels may also occur, as with other hydantoins.
How serious is the interaction between Carbamazepine 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: Monitor seizure frequency and ethotoin and carbamazepine concentrations. Adjust doses when either drug is started or stopped.
What other medicines interact with Carbamazepine?
MediHelp also lists interactions of Carbamazepine with, for example, Artemether / lumefantrine, Cabotegravir, Delamanid. The full list is on the Carbamazepine page.
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