Drug interactions
Dexamethasone + Fentanyl transdermal
Severity: Moderate
Dexamethasone and Fentanyl transdermal: moderate 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
Dexamethasone may induce CYP3A4 and lower fentanyl concentrations, reducing analgesia or precipitating withdrawal. Stopping dexamethasone later may raise fentanyl levels and risk respiratory depression.
What this interaction means in plain words
Dexamethasone and Fentanyl transdermal can affect each other. The combination is often manageable, but it may need a change of dose, a change of timing, or extra checks while both are taken.
Why it happens
Dexamethasone induces CYP3A4, increasing fentanyl metabolism.
What to do
Monitor pain control and withdrawal when dexamethasone is started. Monitor for sedation and respiratory depression when it is stopped and adjust the patch dose accordingly.
What to ask your pharmacist
- Should I take them at different times of day?
- Does the dose of either medicine need to change?
- Is there anything I should avoid, such as alcohol or certain foods, while on both?
Pro+ members
Unlock the full page
Create an account and start a Pro+ trial to unlock the full management advice for Dexamethasone and Fentanyl transdermal, the additional notes, the evidence detail and the whole-prescription interaction checker.
- Full clinical management advice
- Additional notes
- Evidence detail
- Interaction checker for a whole prescription
Try Pro+ free for 7 days on the web. No card needed.
Other interactions of Dexamethasone
- Bcg vaccine live + Dexamethasone Contraindicated
- Dexamethasone + Mifepristone Contraindicated
- Dexamethasone + Rilpivirine Contraindicated
- Dexamethasone + Smallpox vaccine live Contraindicated
- Dexamethasone + Varicella virus vaccine live Contraindicated
- Dexamethasone + Yellow fever vaccine Contraindicated
Frequently asked questions
Can I take Dexamethasone with Fentanyl transdermal?
MediHelp rates the interaction as moderate. Dexamethasone and Fentanyl transdermal can affect each other. The combination is often manageable, but it may need a change of dose, a change of timing, or extra checks while both are taken. Dexamethasone may induce CYP3A4 and lower fentanyl concentrations, reducing analgesia or precipitating withdrawal. Stopping dexamethasone later may raise fentanyl levels and risk respiratory depression.
How serious is the interaction between Dexamethasone and Fentanyl transdermal?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Monitor pain control and withdrawal when dexamethasone is started. Monitor for sedation and respiratory depression when it is stopped and adjust the patch dose accordingly.
What other medicines interact with Dexamethasone?
MediHelp also lists interactions of Dexamethasone with, for example, Bcg vaccine live, Mifepristone, Rilpivirine. The full list is on the Dexamethasone page.
Full monographs, dosing and an interaction checker in the MediHelp app
Open the complete reference, check multi-drug interactions and use dosing tools in the MediHelp app.
