Drug interactions
Gemifloxacin + Lofexidine
Severity: Major
Gemifloxacin 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
Lofexidine prolongs the QT interval and causes bradycardia and hypotension. Adding gemifloxacin increases the risk of torsades de pointes.
What this interaction means in plain words
Gemifloxacin 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.
Gemifloxacin belongs to Anti Bacterial; Lofexidine belongs to Central Nervous System.
Why it happens
Additive QT prolongation, with lofexidine-induced bradycardia further increasing arrhythmia risk.
What to do
Avoid the combination where possible and use a non-QT-prolonging antibiotic. If coadministered, monitor ECG, heart rate, and electrolytes.
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 Gemifloxacin
- Arsenic trioxide + Gemifloxacin Contraindicated
- Dofetilide + Gemifloxacin Contraindicated
- Gemifloxacin + Ibutilide Contraindicated
- Gemifloxacin + Pimozide Contraindicated
- Gemifloxacin + Thioridazine Contraindicated
- Gemifloxacin + Vandetanib Contraindicated
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 Gemifloxacin with Lofexidine?
MediHelp rates the interaction as major. Gemifloxacin 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. Lofexidine prolongs the QT interval and causes bradycardia and hypotension. Adding gemifloxacin increases the risk of torsades de pointes.
How serious is the interaction between Gemifloxacin 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 the combination where possible and use a non-QT-prolonging antibiotic. If coadministered, monitor ECG, heart rate, and electrolytes.
What other medicines interact with Gemifloxacin?
MediHelp also lists interactions of Gemifloxacin with, for example, Arsenic trioxide, Dofetilide, Ibutilide. The full list is on the Gemifloxacin page.
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