Buprenorphine and Benzhydrocodone: 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
Benzhydrocodone
No brand names on recordBuprenorphine
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 these two together. Benzhydrocodone turns into hydrocodone in your body, a full opioid pain reliever. Buprenorphine is a different kind of opioid that only partly turns on the same receptors and can actually block them. Because of this, buprenorphine can push hydrocodone off those receptors, which may weaken your pain relief and, if you are dependent on opioids, even trigger withdrawal symptoms like sweating, chills, nausea, and body aches.
Both drugs can also nudge up serotonin, so there is a small added chance of a reaction called serotonin syndrome. The good news is your care team can manage all of this. Please talk with your doctor or pharmacist before using both.
Benzhydrocodone is a prodrug metabolized to hydrocodone (full mu-opioid agonist). Buprenorphine is a partial mu agonist with high receptor affinity, so co-use can competitively displace hydrocodone, reducing analgesic efficacy and potentially precipitating opioid withdrawal in dependent patients. Additive serotonergic activity also raises serotonin syndrome risk.
- Direction: reduced hydrocodone analgesic effect (PD antagonism), not increased exposure.
- Evidence: theoretical; severity major.
- Onset: unspecified; highest risk during initiation/titration.
- Management: avoid concomitant use; if serotonergic features (agitation, hyperthermia, clonus, autonomic instability) emerge, discontinue and evaluate.
What happens
Reduced analgesic effect or precipitation of withdrawal symptoms, and an increased risk of serotonin syndrome
Interaction Deep Dive
Do not combine HYDROcodone with a mixed opioid agonist/antagonist or a partial agonist opioid analgesic, since doing so can diminish the analgesic action of HYDROcodone and potentially trigger withdrawal symptoms. Moreover, when HYDROcodone is given together with other agents that influence the serotonergic system, monitor the patient closely, particularly at the start of therapy and during dose titration, because the likelihood of serotonin syndrome rises; if it is suspected, stop the medication12.
Why it happens (mechanism)
Opioid receptor antagonism; additive serotonergic effects
How to manage this interaction
Here is how a care team usually handles this:
- Avoiding the combination is generally preferred, since buprenorphine can blunt hydrocodone's pain relief and may bring on withdrawal.
- If both are needed, your team will monitor you closely, especially when starting or adjusting doses, and watch for signs of serotonin syndrome (restlessness, fast heartbeat, sweating, shivering, muscle twitching).
What you should do: do not start, stop, or change either medicine on your own. Keep taking what is prescribed and ask your pharmacist or prescriber whether this pairing is right for you, or whether a different pain option makes sense.
Management is individual — confirm any change with your pharmacist or prescriber.
Common questions
Can I take Buprenorphine and Benzhydrocodone together?
Combining benzhydrocodone (hydrocodone) with buprenorphine can reduce pain relief, trigger withdrawal, and slightly raise serotonin syndrome risk, so this pairing is usually avoided. Check with your prescriber or pharmacist before using both. Always confirm with your pharmacist or prescriber before making any change.
How serious is the Buprenorphine and Benzhydrocodone 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 Benzhydrocodone interaction managed?
Here is how a care team usually handles this: Avoiding the combination is generally preferred, since buprenorphine can blunt hydrocodone's pain relief and may bring on withdrawal. If both are needed, your team will monitor you closely, especially when starting or adjusting doses, and watch for signs of serotonin syndrome (restlessness, fast heartbeat, sweating, shivering, muscle twitching). What y… 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 Benzhydrocodone 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: HYSINGLA(R) ER oral extended-release tablets, hydrocodone bitartrate oral extended-release tablets. Purdue Pharma LP (per FDA), Stamford, CT, 2023. DailyMed
- Product Information: APADAZ(R) oral tablets, benzhydrocodone acetaminophen oral tablets. Zevra Therapeutics, Inc. (per FDA), Celebration, FL, 2023. DailyMed
Keep reading about Benzhydrocodone
Keep reading about Buprenorphine
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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