Drug interactions
Buprenorphine buccal + Venlafaxine
Severity: Moderate
Buprenorphine buccal and Venlafaxine: moderate interaction.
Last updated
For healthcare professionals — reference only. This page is a brief summary, not medical advice and not a substitute for official labeling or clinical judgement. Always verify before prescribing or dispensing.
Summary
Buccal buprenorphine can prolong the QT interval at higher doses, and venlafaxine has some QT-prolonging potential and serotonergic activity. Together they may modestly increase arrhythmia risk, and opioid-serotonergic combinations carry a rare risk of serotonin syndrome.
What this interaction means in plain words
Buprenorphine buccal and Venlafaxine can affect each other. The combination is often manageable, but it may need a change of dose, a change of timing, or extra checks while both are taken.
Why it happens
Possible additive QT prolongation and additive serotonergic effects.
What to do
Use the lowest effective buprenorphine dose and consider an ECG in patients with other QT risk factors. Monitor for agitation, tremor, hyperthermia or other signs of serotonin toxicity.
What to ask your pharmacist
- Should I take them at different times of day?
- Does the dose of either medicine need to change?
- Is there anything I should avoid, such as alcohol or certain foods, while on both?
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Other interactions of Venlafaxine
- Isocarboxazid + Venlafaxine Contraindicated
- Methylene blue + Venlafaxine Contraindicated
- Phenelzine + Venlafaxine Contraindicated
- Procarbazine + Venlafaxine Contraindicated
- Rasagiline + Venlafaxine Contraindicated
- Safinamide + Venlafaxine Contraindicated
Frequently asked questions
Can I take Buprenorphine buccal with Venlafaxine?
MediHelp rates the interaction as moderate. Buprenorphine buccal and Venlafaxine can affect each other. The combination is often manageable, but it may need a change of dose, a change of timing, or extra checks while both are taken. Buccal buprenorphine can prolong the QT interval at higher doses, and venlafaxine has some QT-prolonging potential and serotonergic activity. Together they may modestly increase arrhythmia risk, and opioid-serotonergic combinations carry a rare risk of serotonin syndrome.
How serious is the interaction between Buprenorphine buccal and Venlafaxine?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Use the lowest effective buprenorphine dose and consider an ECG in patients with other QT risk factors. Monitor for agitation, tremor, hyperthermia or other signs of serotonin toxicity.
What other medicines interact with Venlafaxine?
MediHelp also lists interactions of Venlafaxine with, for example, Isocarboxazid, Methylene blue, Phenelzine. The full list is on the Venlafaxine page.
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