Drug interactions
Buprenorphine buccal + Propafenone
Severity: Moderate
Buprenorphine buccal and Propafenone: 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
Buprenorphine can prolong the QTc interval, particularly in buccal and higher-dose formulations. Propafenone adds proarrhythmic and conduction-slowing effects, so the combination may increase the risk of torsade de pointes.
What this interaction means in plain words
Buprenorphine buccal and Propafenone 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
Additive effects on cardiac repolarization and conduction.
What to do
Obtain a baseline ECG and monitor QTc and electrolytes, especially in patients with heart disease. Use the lowest effective buprenorphine dose.
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 Propafenone
- Dofetilide + Propafenone Contraindicated
- Dronedarone + Propafenone Contraindicated
- Nilotinib + Propafenone Contraindicated
- Nirmatrelvir / ritonavir + Propafenone Contraindicated
- Nirmatrelvir + Propafenone Contraindicated
- Pimozide + Propafenone Contraindicated
Frequently asked questions
Can I take Buprenorphine buccal with Propafenone?
MediHelp rates the interaction as moderate. Buprenorphine buccal and Propafenone 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. Buprenorphine can prolong the QTc interval, particularly in buccal and higher-dose formulations. Propafenone adds proarrhythmic and conduction-slowing effects, so the combination may increase the risk of torsade de pointes.
How serious is the interaction between Buprenorphine buccal and Propafenone?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Obtain a baseline ECG and monitor QTc and electrolytes, especially in patients with heart disease. Use the lowest effective buprenorphine dose.
What other medicines interact with Propafenone?
MediHelp also lists interactions of Propafenone with, for example, Dofetilide, Dronedarone, Nilotinib. The full list is on the Propafenone page.
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