Buprenorphine and Sufentanil: Interaction Details
AI-assisted, pharmacist-reviewed · AI content regenerated Jul 11, 2026 · Source data updated Jul 2, 2026 · Sources: FDA labeling, DDInter 2.0, cited literature
Buprenorphine
Sufentanil
How we grade severity & evidence
Severity levels
- Contraindicated: These should generally not be used together.
- Major: Potentially serious — often needs a change or close monitoring.
- Moderate: Can be significant — usually manageable with monitoring.
- Minor: Usually limited clinical impact.
Evidence grades
- Established: Well documented — supported by controlled studies or strong clinical data.
- Probable: Good supporting evidence, though not definitively proven.
- Suspected: Some evidence suggests this interaction, but it is not well established.
- Possible: Limited or conflicting evidence; the interaction may occur.
- Theoretical: Predicted from the drugs' pharmacology; not yet confirmed in people.
Ratings come from the documented interaction literature and are reviewed by a pharmacist. They describe the documented risk of the combination, not what will necessarily happen to you — your dose, timing, and health picture all matter.
Buprenorphine and sufentanil are both strong pain medicines, but they don't work well together. Buprenorphine is a partial opioid, which means it clings tightly to the same spots in your body that sufentanil needs to work. Because it's sitting in those spots, it can block sufentanil, so your pain may not be controlled and you could even feel withdrawal symptoms.
There's also a small, added concern: both can raise a brain chemical called serotonin, and too much can make you feel agitated, sweaty, shaky, or feverish. The good news is your care team knows about this combination and can plan around it. Never stop or change either medicine on your own, just talk with your doctor or pharmacist.
Effect: Buprenorphine, a partial mu-opioid agonist with high receptor affinity, can antagonize the full agonist sufentanil, reducing sufentanil analgesia and potentially precipitating withdrawal. Additive serotonergic activity also raises serotonin syndrome risk.
- Mechanism: competitive opioid receptor antagonism plus additive serotonergic effects (PD interaction).
- Direction: reduced sufentanil analgesic effect; increased serotonin syndrome risk. Neither drug is a prodrug requiring activation here.
- Evidence: theoretical. Onset: unspecified.
- Management: avoid concomitant use. Monitor closely during initiation/titration for serotonin toxicity. Discontinue sufentanil if serotonin syndrome is suspected.
What happens
Reduced analgesic effect of SUFentanil and an increased risk of serotonin syndrome
Interaction Deep Dive
Do not administer SUFentanil together with a partial agonist opioid analgesic or a mixed opioid agonist/antagonist, because such combinations can diminish the analgesic effect of SUFentanil and potentially trigger withdrawal symptoms. In addition, when SUFentanil is given alongside other agents acting on the serotonergic system, monitor the patient closely, particularly at the start of therapy and during dose titration, since the likelihood of serotonin syndrome rises. Should serotonin syndrome be suspected, stop SUFentanil12.
Why it happens (mechanism)
Opioid receptor antagonism; additive serotonergic effects
How to manage this interaction
The documented guidance is to avoid using these two together because buprenorphine can blunt sufentanil's pain relief and may trigger withdrawal.
- Keep taking any medicines exactly as prescribed. Do not start, stop, or change doses on your own.
- Tell every prescriber and your pharmacist that you take buprenorphine, especially before any procedure or hospital stay where sufentanil might be used.
- Your care team may choose a different pain plan, and if both are ever used, they will watch you closely, particularly when starting or adjusting doses.
- Report agitation, fast heartbeat, sweating, shivering, muscle twitching, or fever right away, as these can signal serotonin syndrome.
Management is individual — confirm any change with your pharmacist or prescriber.
Common questions
Can I take Buprenorphine and Sufentanil together?
Buprenorphine can block sufentanil's pain relief and may cause withdrawal, and combining them slightly raises the risk of serotonin syndrome, so this pairing is generally avoided. Make sure every provider knows you take buprenorphine and let your care team decide the safest plan. Always confirm with your pharmacist or prescriber before making any change.
How serious is the Buprenorphine and Sufentanil interaction?
It is rated major. Potentially serious — often needs a change or close monitoring.
How quickly could this interaction happen?
The documented onset is "unspecified". The timing of this interaction is not well characterized.
How is the Buprenorphine and Sufentanil interaction managed?
The documented guidance is to avoid using these two together because buprenorphine can blunt sufentanil's pain relief and may trigger withdrawal. Keep taking any medicines exactly as prescribed. Do not start, stop, or change doses on your own. Tell every prescriber and your pharmacist that you take buprenorphine, especially before any procedure or hospital stay where sufentanil might be used. Your… Management is individual — always follow your own care team's guidance.
How strong is the evidence for this interaction?
The evidence is graded "theoretical". Predicted from the drugs' pharmacology; not yet confirmed in people.
Questions for your pharmacist
- Does my dose of Buprenorphine or Sufentanil need adjusting while I take them together?
- What symptoms should prompt me to call you or my prescriber right away?
- Does the timing of my doses matter for this combination?
- Is there a safer alternative to one of these medications for me?
References (2)
- Product Information: Sufentanil citrate injection, sufentanil citrate r intravenous and epidural injection. Akron Inc (per FDA), Lake Forest, IL, 2023. DailyMed
- Product Information: DSUVIA(TM) sublingual tablets, sufentanil sublingual tablets. AcelRx Pharmaceuticals Inc (per FDA), Hayward, CA, 2023. DailyMed
Keep reading about Buprenorphine
Keep reading about Sufentanil
These medications also interact with supplements
Prescription drugs aren't the whole picture — herbal and dietary supplements can interact with them too. From the evidence-graded Natural Medicines database:
major · moderate · minor — check everything you take with our drug–supplement interaction checker.
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