Trimipramine 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
Trimipramine
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.
You've been prescribed buprenorphine (a pain or addiction medicine) and trimipramine (an older antidepressant). Both drugs can affect the same body systems, so taking them together may add up in a few ways.
Together they can nudge your heart's rhythm (a change called QT prolongation), raise the chance of too much serotonin activity (called serotonin syndrome, which can cause shakiness, sweating, a fast heartbeat, or confusion), and slow your gut, which can lead to serious constipation. The good news: this concern is mostly theoretical, and your care team can manage it by watching you closely and adjusting doses. Keep taking both as prescribed and tell your pharmacist or doctor about any new symptoms.
Additive pharmacodynamic interaction. Both agents are QT-prolonging and serotonergic; buprenorphine plus opioid/TCA effects can also slow GI motility.
- Effects: additive QTc prolongation, increased serotonin syndrome risk, and risk of severe constipation/paralytic ileus.
- Direction: additive (neither drug is a relevant prodrug here).
- Evidence: theoretical; severity major; onset unspecified.
- Management: avoid concomitant use where possible. If unavoidable, monitor closely at initiation and dose changes; consider baseline/follow-up ECG and electrolytes; watch for serotonergic signs (clonus, hyperreflexia, autonomic instability, agitation) and GI hypomotility. Discontinue if serotonin syndrome is suspected.
What happens
An increased risk of QT interval prolongation, an increased risk of serotonin syndrome and an increased risk of paralytic ileus
Interaction Deep Dive
Do not combine buprenorphine with medications that may prolong the QT interval34. Furthermore, giving buprenorphine together with other agents that act on the serotonergic neurotransmitter system can heighten the likelihood of serotonin syndrome. When such combined use cannot be avoided, monitor the patient, particularly when starting therapy and when adjusting the dose, and stop treatment if serotonin syndrome is suspected. Watch for indications of severe constipation, which may progress to paralytic ileus 21.
Why it happens (mechanism)
Additive QT interval prolongation; additive serotonergic effects; additive effects on gastric motility
How to manage this interaction
Keep taking both medicines as prescribed unless your prescriber tells you otherwise. This combination is flagged because the effects can add up, so your care team will manage it carefully.
- Your team may monitor you more closely, especially when starting or changing doses, and doses may be adjusted and individualized for you.
- They may check your heart rhythm (ECG).
- Watch for serotonin syndrome: agitation, sweating, tremor, fast heartbeat, muscle twitching, or confusion.
- Watch for severe constipation that does not resolve, which can signal a bowel problem.
Report any of these symptoms to your pharmacist or doctor promptly.
Management is individual — confirm any change with your pharmacist or prescriber.
Common questions
Can I take Trimipramine and Buprenorphine together?
Combining buprenorphine and trimipramine can add up to affect heart rhythm, serotonin levels, and gut movement, so your care team may monitor you more closely and adjust doses. Keep taking both as prescribed and report symptoms like tremor, fast heartbeat, confusion, or severe constipation. Always confirm with your pharmacist or prescriber before making any change.
How serious is the Trimipramine 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 Trimipramine and Buprenorphine interaction managed?
Keep taking both medicines as prescribed unless your prescriber tells you otherwise. This combination is flagged because the effects can add up, so your care team will manage it carefully. Your team may monitor you more closely, especially when starting or changing doses, and doses may be adjusted and individualized for you. They may check your heart rhythm (ECG). Watch for serotonin syndrome: agi… 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 Trimipramine 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 Trimipramine
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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