Drug interactions
Chlorpromazine + Ciprofloxacin
Severity: Moderate
Chlorpromazine and Ciprofloxacin: 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
Chlorpromazine and ciprofloxacin both can prolong the QT interval, so combined use may increase the risk of torsades de pointes. The absolute risk is greatest in patients with additional risk factors such as electrolyte disturbance, bradycardia, or high antipsychotic doses.
What this interaction means in plain words
Chlorpromazine and Ciprofloxacin 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.
Chlorpromazine belongs to Central Nervous System; Ciprofloxacin belongs to Anti Bacterial.
Why it happens
Additive prolongation of ventricular repolarization through hERG potassium channel inhibition.
What to do
Correct hypokalemia and hypomagnesemia before starting and consider a baseline and follow-up ECG, especially in patients with other risk factors. Prefer a non-QT-prolonging antibiotic if the patient is high risk.
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 Ciprofloxacin
- Agomelatine + Ciprofloxacin Contraindicated
- Ciprofloxacin + Fezolinetant Contraindicated
- Ciprofloxacin + Thioridazine Contraindicated
- Ciprofloxacin + Tizanidine Contraindicated
- Ciprofloxacin + Vandetanib Contraindicated
- Alosetron + Ciprofloxacin Major
Other interactions of Chlorpromazine
- Chlorpromazine + Dofetilide Contraindicated
- Chlorpromazine + Dronedarone Contraindicated
- Chlorpromazine + Droperidol Contraindicated
- Chlorpromazine + Ibutilide Contraindicated
- Chlorpromazine + Metrizamide Contraindicated
- Chlorpromazine + Panobinostat Contraindicated
Frequently asked questions
Can I take Chlorpromazine with Ciprofloxacin?
MediHelp rates the interaction as moderate. Chlorpromazine and Ciprofloxacin 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. Chlorpromazine and ciprofloxacin both can prolong the QT interval, so combined use may increase the risk of torsades de pointes. The absolute risk is greatest in patients with additional risk factors such as electrolyte disturbance, bradycardia, or high antipsychotic doses.
How serious is the interaction between Chlorpromazine and Ciprofloxacin?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Correct hypokalemia and hypomagnesemia before starting and consider a baseline and follow-up ECG, especially in patients with other risk factors. Prefer a non-QT-prolonging antibiotic if the patient is high risk.
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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