Buprenorphine and Sevoflurane: 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
Sevoflurane
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.
Buprenorphine is a strong pain medicine, and sevoflurane is a gas used to put people to sleep for surgery. When they are used together, a few things can happen. Both can affect your heart's rhythm (something called QT prolongation), and both can slow your breathing, so the effect on breathing may add up.
Buprenorphine may also make you need less of the anesthesia gas to stay asleep. The good news is that anesthesia teams use opioids like this every day. They will watch your breathing closely and help you breathe if needed, so this is very manageable in a monitored setting.
Effect: Additive risk of QT prolongation, reduced sevoflurane MAC requirement, and augmented respiratory depression.
- Mechanism: Additive QT effects (buprenorphine is a QT-prolonging opioid); opioids lower the MAC of inhalational anesthetics; additive CNS/respiratory depression. Neither is acting as a metabolic inhibitor here.
- Direction: Enhanced PD effect of the combination.
- Onset: Unspecified (procedural).
- Evidence: Theoretical; severity rated major.
- Management: Monitor respiration and cardiac rhythm; titrate anesthetic to reduced MAC; be prepared to assist ventilation. Sevoflurane remains compatible with opioids as used in routine surgical practice.
What happens
An increased risk of QT interval prolongation, reduced sevoflurane (MAC) exposure needed to produce anesthesia and an increased risk of respiratory depression
Interaction Deep Dive
Do not use buprenorphine together with agents capable of extending the QT interval, including sevoflurane231. When sevoflurane is combined with buprenorphine (an opioid that prolongs QT), the QT effects may be additive, and the combination may lower sevoflurane's minimum alveolar concentration (MAC), just as occurs with other inhalational anesthetics. Respiratory depression can result from sevoflurane, and opioids may intensify this effect. Nevertheless, giving sevoflurane alongside opioids in the way they are typically employed during surgery is compatible. Keep respiration under observation and provide ventilatory support when required 4.
Why it happens (mechanism)
Additive QT interval prolongation; unknown
How to manage this interaction
This combination is used in monitored surgical settings, so keep taking your buprenorphine as prescribed and be sure your surgical and anesthesia team knows you are on it.
- Your anesthesia team may use less of the sevoflurane gas because buprenorphine lowers how much is needed.
- They will watch your breathing and heart rhythm closely and can assist your breathing if needed.
- Tell your prescriber and anesthesiologist about all your medicines, especially any others that affect heart rhythm.
The dose and monitoring will be individualized by your care team, which is how they safely manage this.
Management is individual — confirm any change with your pharmacist or prescriber.
Literature reports
1 report — tap to read
a) Cases of QT prolongation, linked to torsade de pointes (fatal in rare instances), have been reported 4.
Common questions
Can I take Buprenorphine and Sevoflurane together?
Used together in surgery, buprenorphine and sevoflurane can add up to slow breathing and affect heart rhythm, and less anesthesia gas may be needed. This is manageable when your anesthesia team monitors your breathing and heart rhythm and adjusts the dose. Always confirm with your pharmacist or prescriber before making any change.
How serious is the Buprenorphine and Sevoflurane 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 Buprenorphine and Sevoflurane interaction managed?
This combination is used in monitored surgical settings, so keep taking your buprenorphine as prescribed and be sure your surgical and anesthesia team knows you are on it. Your anesthesia team may use less of the sevoflurane gas because buprenorphine lowers how much is needed. They will watch your breathing and heart rhythm closely and can assist your breathing if needed. Tell your prescriber and… 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 Buprenorphine or Sevoflurane 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: 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
- Product Information: ULTANE(R) inhalation liquid, sevoflurane inhalation liquid. AbbVie Inc (per FDA), North Chicago, IL, 2022. DailyMed
Keep reading about Buprenorphine
Keep reading about Sevoflurane
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