Drug interactions
Ciprofloxacin + Mefloquine
Severity: Major
Ciprofloxacin and Mefloquine: 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 ciprofloxacin and mefloquine can prolong the QT interval, and using them together may add to the risk of torsades de pointes and other serious ventricular arrhythmias. The risk rises with electrolyte disturbances, bradycardia or underlying heart disease.
What this interaction means in plain words
Ciprofloxacin and Mefloquine 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.
Ciprofloxacin belongs to Anti Bacterial; Mefloquine belongs to Anti Parasitic.
Why it happens
Additive blockade of cardiac potassium channels (hERG) leading to delayed ventricular repolarization.
What to do
Avoid the combination where an alternative antibiotic or antimalarial is available. If unavoidable, obtain a baseline ECG, correct potassium and magnesium, and monitor the QTc.
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 Ciprofloxacin
- Agomelatine + Ciprofloxacin Contraindicated
- Ciprofloxacin + Fezolinetant Contraindicated
- Ciprofloxacin + Thioridazine Contraindicated
- Ciprofloxacin + Tizanidine Contraindicated
- Ciprofloxacin + Vandetanib Contraindicated
- Alosetron + Ciprofloxacin Major
Other interactions of Mefloquine
- Arsenic trioxide + Mefloquine Contraindicated
- Dronedarone + Mefloquine Contraindicated
- Ibutilide + Mefloquine Contraindicated
- Levoketoconazole + Mefloquine Contraindicated
- Mefloquine + Nilotinib Contraindicated
- Mefloquine + Pimozide Contraindicated
Frequently asked questions
Can I take Ciprofloxacin with Mefloquine?
MediHelp rates the interaction as major. Ciprofloxacin and Mefloquine 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 ciprofloxacin and mefloquine can prolong the QT interval, and using them together may add to the risk of torsades de pointes and other serious ventricular arrhythmias. The risk rises with electrolyte disturbances, bradycardia or underlying heart disease.
How serious is the interaction between Ciprofloxacin and Mefloquine?
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 an alternative antibiotic or antimalarial is available. If unavoidable, obtain a baseline ECG, correct potassium and magnesium, and monitor the QTc.
What other medicines interact with Ciprofloxacin?
MediHelp also lists interactions of Ciprofloxacin with, for example, Agomelatine, Fezolinetant, Thioridazine. The full list is on the Ciprofloxacin page.
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