Buprenorphine and Dronedarone: 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
Dronedarone
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 of these medicines can affect your heart's rhythm. Buprenorphine (for pain or opioid treatment) and dronedarone (Multaq, for an irregular heartbeat) can each stretch out part of your heartbeat called the QT interval. When you take them together, that effect can add up and, in rare cases, trigger a dangerous rhythm.
Because of this risk, these two are generally not meant to be used together. Please don't stop or change anything on your own. Reach out to your pharmacist or doctor soon so they can review your medicines and find a safer plan for you.
Mechanism: additive QT prolongation. Dronedarone alone produces a moderate, dose-related QTc increase (about +10 ms at 400 mg BID). Buprenorphine also carries dose-dependent QT-prolonging potential. Neither is a prodrug here; the effect is pharmacodynamic (additive), not a metabolic activation issue.
- Direction: increased combined QTc prolongation, raising torsade de pointes risk.
- Evidence: probable; onset unspecified.
- Severity: contraindicated per dronedarone labeling.
- Management: avoid coadministration. If unavoidable, ECG/QTc and electrolyte (K+, Mg2+) monitoring and specialist review are warranted; consider alternative agents.
What happens
Increased risk of QT interval prolongation
Interaction Deep Dive
Dronedarone produces a moderate, dose-dependent influence on the QTc interval, raising it by +10 milliseconds when given at 400 mg twice daily. Because of the possible risk of torsade de pointes-type ventricular tachycardia, it must not be given together with agents that prolong the QT interval, including certain phenothiazines, tricyclic antidepressants, certain macrolide antibiotics, and Class I and III antiarrhythmics1.
Why it happens (mechanism)
Additive QT interval prolongation
How to manage this interaction
This combination is generally avoided. Because both drugs can prolong the QT interval, care teams usually choose an alternative rather than use them together.
- Keep taking both exactly as prescribed until you speak with your prescriber. Do not stop either one on your own.
- Contact your pharmacist or doctor promptly so they can review whether a different medicine is safer for you.
- If your team does keep both, they may check an ECG and your blood electrolytes (potassium, magnesium) and monitor you more closely.
- Seek urgent care for fainting, palpitations, or a racing/irregular heartbeat.
Management is individual — confirm any change with your pharmacist or prescriber.
Common questions
Can I take Buprenorphine and Dronedarone together?
Combining buprenorphine and dronedarone can add up their effects on your heart rhythm and is generally avoided; contact your pharmacist or doctor promptly to find a safer option, but don't stop either drug on your own. Always confirm with your pharmacist or prescriber before making any change.
How serious is the Buprenorphine and Dronedarone interaction?
It is rated contraindicated. These should generally not be used together.
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 Dronedarone interaction managed?
This combination is generally avoided. Because both drugs can prolong the QT interval, care teams usually choose an alternative rather than use them together. Keep taking both exactly as prescribed until you speak with your prescriber. Do not stop either one on your own. Contact your pharmacist or doctor promptly so they can review whether a different medicine is safer for you. If your team does k… Management is individual — always follow your own care team's guidance.
How strong is the evidence for this interaction?
The evidence is graded "probable". Good supporting evidence, though not definitively proven.
Questions for your pharmacist
- Does my dose of Buprenorphine or Dronedarone 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: MULTAQ(R) oral tablets, dronedarone oral tablets. sanofi-aventis US LLC (per manufacturer), Bridgewater, NJ, 2017. DailyMed
Keep reading about Buprenorphine
Keep reading about Dronedarone
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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