Lumefantrine 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
Lumefantrine
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.
These two medicines can affect your heartbeat. Buprenorphine (a pain and opioid-treatment medicine) and lumefantrine (used to treat malaria) can each stretch out a part of your heart's electrical cycle called the QT interval. When two drugs that do this are taken together, the effect can add up, which in rare cases can lead to an irregular or dangerous heart rhythm.
This is a theoretical concern, so please don't panic. The risk goes up if you have things like low potassium or magnesium, a slow heart rate, or heart problems. Keep taking both exactly as prescribed and let your pharmacist or doctor know you take both so they can decide if any monitoring or a different choice makes sense.
Interaction: Additive QT interval prolongation when buprenorphine is combined with lumefantrine. Both agents are independently associated with QT prolongation; neither is a prodrug, so this is a pharmacodynamic (additive), not pharmacokinetic, interaction.
- Direction: Increased cumulative QT effect / torsades de pointes risk.
- Evidence: Theoretical; combined magnitude not quantified.
- Onset: Unspecified.
Management: Manufacturer labeling advises avoiding concomitant use where possible. If co-administered, correct electrolytes (K+, Mg2+), review other QT-prolonging drugs, and assess for bradycardia, CHF, baseline/congenital long-QT. Consider ECG monitoring, especially in higher-risk patients.
What happens
An increased risk of QT interval prolongation
Interaction Deep Dive
Concurrent administration of buprenorphine alongside agents capable of prolonging the QT interval should be avoided342. It remains unknown what risk arises from pairing buprenorphine with additional QT prolongation medications. When buprenorphine is being prescribed 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, these findings should be weighed in clinical decision-making1.
Why it happens (mechanism)
Additive QT interval prolongation
How to manage this interaction
The good news: your care team can manage this. Because both drugs can lengthen the QT interval, your prescriber may choose to avoid using them together, or may monitor you more closely if both are needed.
- Keep taking both exactly as prescribed unless your doctor tells you otherwise.
- Tell your pharmacist and prescriber about every medicine you take, since other drugs can add to QT risk.
- Your team may check your potassium and magnesium levels and possibly your heart rhythm (ECG), especially if you have heart disease or a slow heartbeat.
- Get urgent care if you feel fainting, palpitations, or a racing/irregular heartbeat.
Management is individual — confirm any change with your pharmacist or prescriber.
Common questions
Can I take Lumefantrine and Buprenorphine together?
Buprenorphine and lumefantrine can both prolong the QT interval, so taking them together may add up and raise the risk of a heart rhythm problem; tell your care team so they can decide whether to avoid the combination or monitor you more closely. Always confirm with your pharmacist or prescriber before making any change.
How serious is the Lumefantrine 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 Lumefantrine and Buprenorphine interaction managed?
The good news: your care team can manage this. Because both drugs can lengthen the QT interval, your prescriber may choose to avoid using them together, or may monitor you more closely if both are needed. Keep taking both exactly as prescribed unless your doctor tells you otherwise. Tell your pharmacist and prescriber about every medicine you take, since other drugs can add to QT risk. Your team m… 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 Lumefantrine 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 Lumefantrine
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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