Fluconazole and Sulfonylureas: Drug Interaction Guide

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

Interaction severity: Moderate — caution required

How Fluconazole interacts with Sulfonylureas

Fluconazole inhibits CYP2C9 metabolism of glimepiride, glipizide, and glyburide, increasing exposure and risk of hypoglycemia.

What you should do

Monitor blood glucose closely and consider reducing sulfonylurea dose by 25-50% during fluconazole therapy.

Key facts

Severity

Moderate — caution required

Mechanism

Fluconazole inhibits CYP2C9 metabolism of glimepiride, glipizide, and glyburide, increasing exposure and risk of hypogly...

Action

Monitor blood glucose closely and consider reducing sulfonylurea dose by 25-50% during fluconazole therapy.

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 Fluconazole and Sulfonylureas together?

With caution. Monitor blood glucose closely and consider reducing sulfonylurea dose by 25-50% during fluconazole therapy.

What is the severity of this interaction?

The interaction between Fluconazole and Sulfonylureas is classified as Moderate — caution required. Fluconazole inhibits CYP2C9 metabolism of glimepiride, glipizide, and glyburide, increasing exposure and risk of hypoglycemia.

What should I do if I'm prescribed both?

Monitor blood glucose closely and consider reducing sulfonylurea dose by 25-50% during fluconazole therapy. Always consult your prescribing clinician — do not stop or change medications without medical guidance.

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