Drug interactions
Buprenorphine transdermal + Lofexidine
Severity: Moderate
Buprenorphine transdermal and Lofexidine: 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
Both drugs can prolong the QT interval, and lofexidine also lowers heart rate and blood pressure. Combined use may increase the risk of arrhythmia and symptomatic hypotension.
What this interaction means in plain words
Buprenorphine transdermal and Lofexidine 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 QT prolongation and additive hypotensive effects.
What to do
Obtain a baseline ECG and monitor QTc, heart rate and blood pressure. Correct potassium and magnesium abnormalities and avoid other QT-prolonging drugs.
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 Lofexidine
- Adagrasib + Lofexidine Major
- Alfuzosin + Lofexidine Major
- Amiodarone + Lofexidine Major
- Amisulpride + Lofexidine Major
- Anagrelide + Lofexidine Major
- Apomorphine + Lofexidine Major
Frequently asked questions
Can I take Buprenorphine transdermal with Lofexidine?
MediHelp rates the interaction as moderate. Buprenorphine transdermal and Lofexidine 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. Both drugs can prolong the QT interval, and lofexidine also lowers heart rate and blood pressure. Combined use may increase the risk of arrhythmia and symptomatic hypotension.
How serious is the interaction between Buprenorphine transdermal and Lofexidine?
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, heart rate and blood pressure. Correct potassium and magnesium abnormalities and avoid other QT-prolonging drugs.
What other medicines interact with Lofexidine?
MediHelp also lists interactions of Lofexidine with, for example, Adagrasib, Alfuzosin, Amiodarone. The full list is on the Lofexidine page.
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