Drug interactions
Ethotoin + Mexiletine
Severity: Moderate
Ethotoin and Mexiletine: 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
Hydantoin anticonvulsants induce hepatic enzymes and phenytoin is known to lower mexiletine levels. Ethotoin may similarly reduce mexiletine efficacy, with possible loss of arrhythmia or pain control.
What this interaction means in plain words
Ethotoin and Mexiletine 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
Hepatic enzyme induction by ethotoin increases mexiletine metabolism.
What to do
Monitor clinical response and mexiletine levels, and increase the dose if efficacy declines. Re-evaluate the dose if ethotoin is 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 Mexiletine
- Fezolinetant + Mexiletine Contraindicated
- Mexiletine + Pimozide Contraindicated
- Alosetron + Mexiletine Major
- Amiodarone + Mexiletine Major
- Clozapine + Mexiletine Major
- Cobicistat + Mexiletine Major
Frequently asked questions
Can I take Ethotoin with Mexiletine?
MediHelp rates the interaction as moderate. Ethotoin and Mexiletine 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. Hydantoin anticonvulsants induce hepatic enzymes and phenytoin is known to lower mexiletine levels. Ethotoin may similarly reduce mexiletine efficacy, with possible loss of arrhythmia or pain control.
How serious is the interaction between Ethotoin and Mexiletine?
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 clinical response and mexiletine levels, and increase the dose if efficacy declines. Re-evaluate the dose if ethotoin is stopped.
What other medicines interact with Mexiletine?
MediHelp also lists interactions of Mexiletine with, for example, Fezolinetant, Pimozide, Alosetron. The full list is on the Mexiletine page.
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