Drug interactions
Ethinylestradiol + Mexiletine
Severity: Minor
Ethinylestradiol and Mexiletine: minor 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
Ethinylestradiol weakly inhibits CYP1A2 and may modestly raise mexiletine concentrations. The effect is generally small but could contribute to dose-related adverse effects.
What this interaction means in plain words
Ethinylestradiol and Mexiletine have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised.
Why it happens
Weak CYP1A2 inhibition by ethinylestradiol reduces mexiletine clearance.
What to do
No routine dose change; monitor for dizziness, tremor or nausea if estrogen therapy is started or stopped.
What to ask your pharmacist
- Is there anything I should notice while taking both?
- Do I need to tell my doctor at the next visit?
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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 Ethinylestradiol with Mexiletine?
MediHelp rates the interaction as minor. Ethinylestradiol and Mexiletine have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised. Ethinylestradiol weakly inhibits CYP1A2 and may modestly raise mexiletine concentrations. The effect is generally small but could contribute to dose-related adverse effects.
How serious is the interaction between Ethinylestradiol and Mexiletine?
MediHelp rates it minor, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: No routine dose change; monitor for dizziness, tremor or nausea if estrogen therapy is started or 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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