Drug interactions
Amisulpride + Lofexidine
Severity: Major
Amisulpride and Lofexidine: major 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 causes bradycardia, which adds to proarrhythmic risk. Together they increase the chance of torsades de pointes.
What this interaction means in plain words
Amisulpride and Lofexidine can interact in a way that may be serious. Using them together is sometimes necessary, but it needs a deliberate decision by the prescriber, a plan for monitoring, and clear advice on the warning signs to watch for.
Amisulpride belongs to Central Nervous System; Lofexidine belongs to Central Nervous System.
Why it happens
Additive QT prolongation, aggravated by lofexidine-induced bradycardia.
What to do
Avoid if possible. If co-administered, obtain ECG monitoring, correct potassium and magnesium, and monitor heart rate.
What to ask your pharmacist
- Does the benefit of taking both outweigh the risk in my case?
- Do I need any blood test, ECG or other check while on both?
- What early warning signs should I watch for, and what should I do if they appear?
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Other interactions of Lofexidine
- Adagrasib + Lofexidine Major
- Alfuzosin + Lofexidine Major
- Amiodarone + Lofexidine Major
- Anagrelide + Lofexidine Major
- Apomorphine + Lofexidine Major
- Arsenic trioxide + Lofexidine Major
Other interactions of Amisulpride
- Amiodarone + Amisulpride Contraindicated
- Amisulpride + Arsenic trioxide Contraindicated
- Amisulpride + Disopyramide Contraindicated
- Amisulpride + Dofetilide Contraindicated
- Amisulpride + Droperidol Contraindicated
- Amisulpride + Ibutilide Contraindicated
Frequently asked questions
Can I take Amisulpride with Lofexidine?
MediHelp rates the interaction as major. Amisulpride and Lofexidine can interact in a way that may be serious. Using them together is sometimes necessary, but it needs a deliberate decision by the prescriber, a plan for monitoring, and clear advice on the warning signs to watch for. Both drugs can prolong the QT interval, and lofexidine also causes bradycardia, which adds to proarrhythmic risk. Together they increase the chance of torsades de pointes.
How serious is the interaction between Amisulpride and Lofexidine?
MediHelp rates it major, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Avoid if possible. If co-administered, obtain ECG monitoring, correct potassium and magnesium, and monitor heart rate.
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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