Drug interactions
Mexiletine + Peginterferon alfa 2a
Severity: Moderate
Mexiletine and Peginterferon alfa 2a: 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
Peginterferon alfa-2a inhibits CYP1A2, which participates in mexiletine metabolism, so mexiletine levels may rise. This may increase neurological effects such as tremor and dizziness and proarrhythmic risk.
What this interaction means in plain words
Mexiletine and Peginterferon alfa 2a 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.
Mexiletine belongs to Cardiovascular; Peginterferon alfa 2a belongs to Anti Virals.
Why it happens
Inhibition of CYP1A2-mediated mexiletine metabolism by peginterferon alfa-2a.
What to do
Monitor for tremor, dizziness, nausea and arrhythmia, and consider checking ECG or drug levels. Reduce the mexiletine dose if adverse effects occur.
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 Peginterferon alfa 2a
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 Peginterferon alfa 2a?
MediHelp rates the interaction as moderate. Mexiletine and Peginterferon alfa 2a 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. Peginterferon alfa-2a inhibits CYP1A2, which participates in mexiletine metabolism, so mexiletine levels may rise. This may increase neurological effects such as tremor and dizziness and proarrhythmic risk.
How serious is the interaction between Mexiletine and Peginterferon alfa 2a?
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 tremor, dizziness, nausea and arrhythmia, and consider checking ECG or drug levels. Reduce the mexiletine dose if adverse effects occur.
What other medicines interact with Peginterferon alfa 2a?
MediHelp also lists interactions of Peginterferon alfa 2a with, for example, Clozapine, Deferiprone, Hydroxycarbamide. The full list is on the Peginterferon alfa 2a page.
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