Ethinylestradiol and Topiramate: Drug Interaction Guide

Quick answer: This combination requires caution. Ethinylestradiol and Topiramate can be used together with adjustments and monitoring.

Interaction severity: Moderate — caution required

How Ethinylestradiol interacts with Topiramate

Topiramate at doses above 200 mg/day induces CYP3A4 and increases estrogen clearance, reducing contraceptive reliability.

What you should do

For doses ≥200 mg/day, use a contraceptive containing at least 35 microgram ethinylestradiol or a non-hormonal method such as a copper IUD.

Key facts

Severity

Moderate — caution required

Mechanism

Topiramate at doses above 200 mg/day induces CYP3A4 and increases estrogen clearance, reducing contraceptive reliability...

Action

For doses ≥200 mg/day, use a contraceptive containing at least 35 microgram ethinylestradiol or a non-hormonal method su...

Important medical disclaimer: This page provides educational information about drug interactions for general reference. It is not a substitute for professional medical advice, diagnosis, or treatment. Always discuss your specific medications with a qualified healthcare provider before starting, stopping, or changing any treatment. About our editorial team.

Frequently asked questions

Can I take Ethinylestradiol and Topiramate together?

With caution. For doses ≥200 mg/day, use a contraceptive containing at least 35 microgram ethinylestradiol or a non-hormonal method such as a copper IUD.

What is the severity of this interaction?

The interaction between Ethinylestradiol and Topiramate is classified as Moderate — caution required. Topiramate at doses above 200 mg/day induces CYP3A4 and increases estrogen clearance, reducing contraceptive reliability.

What should I do if I'm prescribed both?

For doses ≥200 mg/day, use a contraceptive containing at least 35 microgram ethinylestradiol or a non-hormonal method such as a copper IUD. Always consult your prescribing clinician — do not stop or change medications without medical guidance.

Last reviewed: by iMedic Medical Editorial Team. Our editorial process.