Drug interactions
Mexiletine + Pentobarbital
Severity: Moderate
Mexiletine and Pentobarbital: 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
Barbiturates induce hepatic enzymes and may lower mexiletine concentrations, reducing efficacy. Additive CNS depression is also possible.
What this interaction means in plain words
Mexiletine and Pentobarbital 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
Barbiturate-induced hepatic enzyme induction increases mexiletine metabolism.
What to do
Monitor arrhythmia or pain control and mexiletine levels, and increase the dose if response is lost. Reassess the dose when the barbiturate 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 Mexiletine with Pentobarbital?
MediHelp rates the interaction as moderate. Mexiletine and Pentobarbital 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. Barbiturates induce hepatic enzymes and may lower mexiletine concentrations, reducing efficacy. Additive CNS depression is also possible.
How serious is the interaction between Mexiletine and Pentobarbital?
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 arrhythmia or pain control and mexiletine levels, and increase the dose if response is lost. Reassess the dose when the barbiturate 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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