Histrelin 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
Histrelin
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.
You've been prescribed buprenorphine (a pain or opioid-dependence medicine) and histrelin (a hormone medicine). Both drugs can, on their own, have a small effect on your heart's electrical timing, something doctors call the QT interval. When two medicines that do this are taken together, that effect can add up and, in rare cases, lead to an irregular heartbeat.
I want to be clear: this concern is theoretical, meaning it's based on how these drugs work rather than lots of real-world reports. Please don't stop either medicine on your own. Your care team can manage this by reviewing your heart health and monitoring you if needed. Just bring it up with your pharmacist or doctor.
Effect: Additive risk of QT interval prolongation with concomitant buprenorphine and histrelin.
Mechanism: Pharmacodynamic (additive), not metabolic. Neither agent is metabolically dependent on the other; both are independently associated with QT prolongation.
Direction/magnitude: Additive QTc effect; magnitude of the combination is not established.
- Onset: unspecified
- Evidence: theoretical
- Severity: major
Management: Avoid concurrent use where feasible. Assess and correct modifiable risk factors (hypokalemia, hypomagnesemia, bradycardia, CHF, baseline/congenital QT prolongation, digitalis use, recent AF cardioversion). Consider baseline and follow-up ECG and electrolytes if co-administration is necessary.
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 combined with other agents that prolong the QT interval. When prescribing buprenorphine, factor in these findings during clinical decision-making for patients who have 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 1.
Why it happens (mechanism)
Additive QT interval prolongation
How to manage this interaction
Both medicines can lengthen the heart's QT interval, so together the effect may add up. Here is how this is typically handled:
- Keep taking both as prescribed unless your doctor tells you otherwise.
- Your team may prefer to avoid using them together when a good alternative exists, or may monitor you more closely (such as with an ECG and blood electrolyte checks) if you use both.
- Tell your prescriber about any history of heart rhythm problems, low potassium or magnesium, slow heartbeat, or heart failure, since these raise the risk.
Call your doctor promptly if you feel fainting, dizziness, or a fluttering or irregular heartbeat.
Management is individual — confirm any change with your pharmacist or prescriber.
Common questions
Can I take Histrelin and Buprenorphine together?
Buprenorphine and histrelin can each affect heart rhythm, so combining them may add up to a higher risk of QT prolongation; the concern is theoretical, but check with your doctor or pharmacist, who may avoid the combination or monitor you more closely. Always confirm with your pharmacist or prescriber before making any change.
How serious is the Histrelin 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 Histrelin and Buprenorphine interaction managed?
Both medicines can lengthen the heart's QT interval, so together the effect may add up. Here is how this is typically handled: Keep taking both as prescribed unless your doctor tells you otherwise. Your team may prefer to avoid using them together when a good alternative exists, or may monitor you more closely (such as with an ECG and blood electrolyte checks) if you use both. Tell your prescriber… 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 Histrelin 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 Histrelin
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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