Drug interactions
Green tea + Mexiletine
Severity: Moderate
Green tea 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
Mexiletine inhibits CYP1A2, which clears caffeine, so caffeine from green tea may accumulate. This can cause tachycardia, palpitations, tremor and insomnia, which matters in patients with arrhythmias.
What this interaction means in plain words
Green tea 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.
Green tea belongs to Gastrointestinal Tract; Mexiletine belongs to Cardiovascular.
Why it happens
CYP1A2 inhibition by mexiletine decreases caffeine clearance.
What to do
Advise limiting green tea and other caffeine sources and monitor for palpitations or arrhythmia.
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 Green tea
- Adenosine + Green tea Moderate
- Benzphetamine + Green tea Moderate
- Bortezomib + Green tea Moderate
- Dextroamphetamine + Green tea Moderate
- Diethylpropion + Green tea Moderate
- Ephedrine + Green tea Moderate
Frequently asked questions
Can I take Green tea with Mexiletine?
MediHelp rates the interaction as moderate. Green tea 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. Mexiletine inhibits CYP1A2, which clears caffeine, so caffeine from green tea may accumulate. This can cause tachycardia, palpitations, tremor and insomnia, which matters in patients with arrhythmias.
How serious is the interaction between Green tea 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: Advise limiting green tea and other caffeine sources and monitor for palpitations or arrhythmia.
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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