Risperidone and Buprenorphine: 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
Risperidone
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.
Both buprenorphine (a pain or addiction medicine) and risperidone (used for mood and mental health conditions) can each affect the timing of your heartbeat. Doctors call this the QT interval. When two medicines that do this are taken together, they can add up and slightly raise the chance of an irregular heart rhythm.
I want to be honest with you: this risk is mostly theoretical, meaning it is based on how the drugs work rather than lots of real-world cases. Many people take medicines like these safely. Your care team can manage this by checking on you and tailoring your treatment, so please keep taking both as prescribed and bring up any concerns with them.
Effect: Additive risk of QT interval prolongation with concomitant buprenorphine and risperidone. This is a pharmacodynamic (PD) interaction, not a metabolic one; neither agent's clearance drives the effect.
- Direction/magnitude: Additive QTc effect; magnitude not quantified.
- Onset: Unspecified.
- Evidence: Theoretical; combined risk not established.
- Management: Manufacturer labeling advises avoiding concomitant use. Where co-prescribed, assess and correct QT risk factors (hypokalemia, hypomagnesemia, bradycardia, CHF, baseline/congenital QT prolongation, recent AF conversion, digitalis therapy). Consider baseline and follow-up ECG and electrolyte monitoring; individualize.
What happens
An increased risk of QT interval prolongation
Interaction Deep Dive
Buprenorphine should not be taken together with medications capable of prolonging the QT interval 342. It remains unknown what risk arises when buprenorphine is paired with other agents that prolong QT prolongation. When prescribing buprenorphine to patients who carry risk factors, including hypokalemia, bradycardia, recent conversion from atrial fibrillation, congestive heart failure, digitalis therapy, baseline QT prolongation, subclinical long-QT syndrome, or severe hypomagnesemia, clinicians should weigh these considerations in their decisions 1.
Why it happens (mechanism)
Additive QT interval prolongation
How to manage this interaction
The main concern is that both drugs can nudge your heart rhythm in the same direction. Your care team can handle this by watching you more closely and tailoring your treatment.
- Keep taking both exactly as prescribed unless your prescriber tells you otherwise.
- Your team may check an ECG and your potassium and magnesium levels, and correct them if needed.
- Tell your prescriber if you have a history of heart rhythm problems, low potassium or magnesium, a slow heartbeat, heart failure, or a family history of long-QT syndrome.
- Report fainting, palpitations, or dizziness promptly.
Ask your pharmacist or doctor whether this combination is right for you.
Management is individual — confirm any change with your pharmacist or prescriber.
Common questions
Can I take Risperidone and Buprenorphine together?
Buprenorphine and risperidone can both affect heart rhythm (QT), and the theoretical risk adds up when combined. Keep taking both as prescribed and let your care team check your heart rhythm and electrolytes. Always confirm with your pharmacist or prescriber before making any change.
How serious is the Risperidone and Buprenorphine 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 Risperidone and Buprenorphine interaction managed?
The main concern is that both drugs can nudge your heart rhythm in the same direction. Your care team can handle this by watching you more closely and tailoring your treatment. Keep taking both exactly as prescribed unless your prescriber tells you otherwise. Your team may check an ECG and your potassium and magnesium levels, and correct them if needed. Tell your prescriber if you have a history o… 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 Risperidone or Buprenorphine 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 (4)
- Product Information: BRIXADI(TM) subcutaneous extended-release injection, buprenorphine subcutaneous extended-release injection. Braeburn Inc (per FDA), Plymouth Meeting, PA, 2023. DailyMed
- Product Information: BUTRANS(R) transdermal system patch, buprenorphine transdermal system patch. Purdue Pharma L.P. (per FDA), Stamford, CT, 2016. DailyMed
- Product Information: BELBUCA(TM) buccal film, buprenorphine buccal film. Endo Pharmaceuticals Inc. (per FDA), Malvern, PA, 2016.
- Product Information: BUPRENEX(R) intravenous injection, intramuscular injection, buprenorphine HCl intravenous injection, intramuscular injection. Indivior Inc. (per DailyMed), Richmond, VA, 2016. DailyMed
Keep reading about Buprenorphine
Keep reading about Risperidone
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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