Drug interactions
Epcoritamab + Mexiletine
Severity: Moderate
Epcoritamab 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
Epcoritamab causes cytokine release that can transiently suppress CYP enzymes, potentially increasing exposure to CYP1A2 substrates such as mexiletine. Small concentration increases of a narrow-therapeutic-index drug may lead to neurological or cardiac toxicity.
What this interaction means in plain words
Epcoritamab 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.
Epcoritamab belongs to Oncology; Mexiletine belongs to Cardiovascular.
Why it happens
Cytokine-mediated suppression of hepatic CYP1A2 reduces mexiletine metabolism.
What to do
Monitor for mexiletine toxicity and ECG changes after epcoritamab initiation and during cytokine release syndrome. Consider mexiletine level monitoring and dose reduction.
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
Other interactions of Epcoritamab
- Epcoritamab + Ergotamine Major
- Epcoritamab + Pimozide Major
- Bendamustine + Epcoritamab Moderate
- Carbamazepine + Epcoritamab Moderate
- Clomipramine + Epcoritamab Moderate
- Clozapine + Epcoritamab Moderate
Frequently asked questions
Can I take Epcoritamab with Mexiletine?
MediHelp rates the interaction as moderate. Epcoritamab 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. Epcoritamab causes cytokine release that can transiently suppress CYP enzymes, potentially increasing exposure to CYP1A2 substrates such as mexiletine. Small concentration increases of a narrow-therapeutic-index drug may lead to neurological or cardiac toxicity.
How serious is the interaction between Epcoritamab 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 for mexiletine toxicity and ECG changes after epcoritamab initiation and during cytokine release syndrome. Consider mexiletine level monitoring and dose reduction.
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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