Drug interactions
Mexiletine + Pipemidic acid
Severity: Moderate
Mexiletine and Pipemidic acid: 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
Pipemidic acid is a potent CYP1A2 inhibitor and can raise levels of CYP1A2 substrates. Mexiletine concentrations may increase, raising the risk of tremor, dizziness, nausea and arrhythmia.
What this interaction means in plain words
Mexiletine and Pipemidic acid 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
Inhibition of CYP1A2 reduces mexiletine metabolic clearance.
What to do
Monitor for mexiletine toxicity and consider a dose reduction or level check during co-therapy. Consider an alternative antibiotic if toxicity develops.
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 Pipemidic acid?
MediHelp rates the interaction as moderate. Mexiletine and Pipemidic acid 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. Pipemidic acid is a potent CYP1A2 inhibitor and can raise levels of CYP1A2 substrates. Mexiletine concentrations may increase, raising the risk of tremor, dizziness, nausea and arrhythmia.
How serious is the interaction between Mexiletine and Pipemidic acid?
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 for mexiletine toxicity and consider a dose reduction or level check during co-therapy. Consider an alternative antibiotic if toxicity develops.
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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