Ethinylestradiol and Fluconazole: Drug Interaction Guide

Quick answer: Ethinylestradiol and Fluconazole have a minor interaction — typically manageable with awareness.

How Ethinylestradiol interacts with Fluconazole

Fluconazole inhibits CYP3A4 and CYP2C9, which can modestly increase ethinylestradiol exposure without reducing contraceptive efficacy.

What you should do

No routine contraceptive adjustment is required. Counsel about a possible increase in oestrogen-related adverse effects.

Key facts

Severity

Minor — typically manageable

Mechanism

Fluconazole inhibits CYP3A4 and CYP2C9, which can modestly increase ethinylestradiol exposure without reducing contracep...

Action

No routine contraceptive adjustment is required. Counsel about a possible increase in oestrogen-related adverse effects.

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 Fluconazole together?

Usually yes, with awareness. No routine contraceptive adjustment is required. Counsel about a possible increase in oestrogen-related adverse effects.

What is the severity of this interaction?

The interaction between Ethinylestradiol and Fluconazole is classified as Minor — typically manageable. Fluconazole inhibits CYP3A4 and CYP2C9, which can modestly increase ethinylestradiol exposure without reducing contraceptive efficacy.

What should I do if I'm prescribed both?

No routine contraceptive adjustment is required. Counsel about a possible increase in oestrogen-related adverse effects. Always consult your prescribing clinician — do not stop or change medications without medical guidance.

Last reviewed: July 16, 2026 by iMedic Medical Editorial Team. Our editorial process.