Buprenorphine and Oxymorphone: 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
Oxymorphone
No brand names on record
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.
Let's talk about taking buprenorphine and oxymorphone together. Oxymorphone is a full opioid pain reliever. Buprenorphine is a special kind of opioid that only partly turns on the same receptors, and it holds on very tightly. Because of this, buprenorphine can actually block some of oxymorphone's pain relief, and if you already depend on a full opioid, it can even push you into withdrawal (things like sweating, chills, stomach cramps, and feeling very restless).
There is also a smaller, theoretical concern that both drugs nudge serotonin in the body, which in rare cases can add up. The good news is your care team can manage all of this safely, so please talk with your pharmacist or doctor before combining them.
Mechanism: Buprenorphine is a high-affinity partial mu-opioid agonist/antagonist. Co-administration with oxymorphone (a full mu agonist) can competitively displace or block oxymorphone at the receptor, reducing analgesia and potentially precipitating acute opioid withdrawal. Additive serotonergic activity also raises theoretical serotonin syndrome risk.
- Direction: reduced oxymorphone effect; withdrawal in opioid-dependent patients.
- Evidence: theoretical; severity rated major.
- Onset: unspecified (withdrawal can occur rapidly after buprenorphine dosing).
- Management: avoid concomitant use. If serotonergic effects are a concern, observe closely during initiation/titration for hyperthermia, clonus, agitation, and autonomic instability; discontinue if serotonin syndrome is suspected.
What happens
Reduced analgesic effect or precipitation of withdrawal symptoms and an increased risk of serotonin syndrome
Interaction Deep Dive
Do not combine oxyMORphone with a mixed opioid agonist/antagonist or a partial opioid agonist analgesic, since doing so can lessen the analgesic effect of oxyMORphone and may trigger withdrawal symptoms. When oxyMORphone is used together with other agents that act on the serotonergic system, monitor the patient closely, particularly at initiation and during titration, because the likelihood of serotonin syndrome rises; treatment should be stopped if this condition is suspected1.
Why it happens (mechanism)
Opioid receptor antagonism; additive serotonergic effects
How to manage this interaction
What your care team may do:
- Generally avoid using these two opioids together, since buprenorphine can block oxymorphone's pain relief and trigger withdrawal.
- Choose one appropriate opioid strategy rather than overlapping them, and plan any switch carefully.
- Watch you closely, especially when starting or adjusting doses, for withdrawal signs or rare serotonin-related symptoms (agitation, sweating, shivering, fast heartbeat, muscle twitching).
What you should do: Keep taking your medications exactly as prescribed and do not stop or change either one on your own. Tell your pharmacist or prescriber that you have been prescribed both so your therapy can be tailored and monitored.
Management is individual — confirm any change with your pharmacist or prescriber.
Common questions
Can I take Buprenorphine and Oxymorphone together?
Buprenorphine can cancel out oxymorphone's pain relief and may set off withdrawal, so these are usually not combined; check with your pharmacist or doctor before taking both. Always confirm with your pharmacist or prescriber before making any change.
How serious is the Buprenorphine and Oxymorphone 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 Oxymorphone interaction managed?
What your care team may do: Generally avoid using these two opioids together, since buprenorphine can block oxymorphone's pain relief and trigger withdrawal. Choose one appropriate opioid strategy rather than overlapping them, and plan any switch carefully. Watch you closely, especially when starting or adjusting doses, for withdrawal signs or rare serotonin-related symptoms (agitation, sweating,… 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 Oxymorphone 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 (1)
- Product Information: OPANA(R) ER oral extended-release tablets, oxymorphone HCl oral extended-release tablets. Endo Pharmaceuticals Inc (per FDA), Malvern, PA, 2023. DailyMed
Keep reading about Buprenorphine
Keep reading about Oxymorphone
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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