Fentanyl and Voriconazole: Drug Interaction Guide

Quick answer: This is a major interaction — avoid combining Fentanyl and Voriconazole unless specifically directed by your doctor.

Interaction severity: Major — avoid combination

How Fentanyl interacts with Voriconazole

Voriconazole inhibits CYP3A4, reducing fentanyl metabolism and increasing opioid exposure. This can cause profound sedation and respiratory depression.

What you should do

Avoid when possible or reduce fentanyl dose with close monitoring. Ensure naloxone availability and monitor respiratory status during initiation or discontinuation.

Key facts

Severity

Major — avoid combination

Mechanism

Voriconazole inhibits CYP3A4, reducing fentanyl metabolism and increasing opioid exposure. This can cause profound sedat...

Action

Avoid when possible or reduce fentanyl dose with close monitoring. Ensure naloxone availability and monitor respiratory ...

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 Fentanyl and Voriconazole together?

No — this combination should generally be avoided. Avoid when possible or reduce fentanyl dose with close monitoring. Ensure naloxone availability and monitor respiratory status during initiation or discontinuation.

What is the severity of this interaction?

The interaction between Fentanyl and Voriconazole is classified as Major — avoid combination. Voriconazole inhibits CYP3A4, reducing fentanyl metabolism and increasing opioid exposure. This can cause profound sedation and respiratory depression.

What should I do if I'm prescribed both?

Avoid when possible or reduce fentanyl dose with close monitoring. Ensure naloxone availability and monitor respiratory status during initiation or discontinuation. Always consult your prescribing clinician — do not stop or change medications without medical guidance.

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