Drug interactions
Buprenorphine subdermal implant + Fentanyl
Severity: Major
Buprenorphine subdermal implant and Fentanyl: major interaction.
Last updated Sources: US FDA label
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
Buprenorphine implants provide continuous receptor occupancy that can blunt fentanyl analgesia, while overall opioid exposure may still add to sedation and respiratory depression. Management of acute pain is difficult.
What this interaction means in plain words
Buprenorphine subdermal implant and Fentanyl can interact in a way that may be serious. Using them together is sometimes necessary, but it needs a deliberate decision by the prescriber, a plan for monitoring, and clear advice on the warning signs to watch for.
Why it happens
Partial agonist occupancy of mu receptors competes with fentanyl, with additive CNS depression.
What to do
Avoid fentanyl where alternatives exist; if used, titrate carefully under monitoring for respiratory depression and inadequate analgesia, and consider non-opioid options.
What to ask your pharmacist
- Does the benefit of taking both outweigh the risk in my case?
- Do I need any blood test, ECG or other check while on both?
- What early warning signs should I watch for, and what should I do if they appear?
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References
Other interactions of Fentanyl
- Alvimopan + Fentanyl Contraindicated
- Fentanyl + Isocarboxazid Contraindicated
- Fentanyl + Olanzapine / samidorphan Contraindicated
- Fentanyl + Phenelzine Contraindicated
- Fentanyl + Tranylcypromine Contraindicated
- Alfentanil + Fentanyl Major
Frequently asked questions
Can I take Buprenorphine subdermal implant with Fentanyl?
MediHelp rates the interaction as major. Buprenorphine subdermal implant and Fentanyl can interact in a way that may be serious. Using them together is sometimes necessary, but it needs a deliberate decision by the prescriber, a plan for monitoring, and clear advice on the warning signs to watch for. Buprenorphine implants provide continuous receptor occupancy that can blunt fentanyl analgesia, while overall opioid exposure may still add to sedation and respiratory depression. Management of acute pain is difficult.
How serious is the interaction between Buprenorphine subdermal implant and Fentanyl?
MediHelp rates it major, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Avoid fentanyl where alternatives exist; if used, titrate carefully under monitoring for respiratory depression and inadequate analgesia, and consider non-opioid options.
What other medicines interact with Fentanyl?
MediHelp also lists interactions of Fentanyl with, for example, Alvimopan, Isocarboxazid, Olanzapine / samidorphan. The full list is on the Fentanyl page.
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