Drug interactions
Citalopram + Ofloxacin
Severity: Major
Citalopram and Ofloxacin: 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
Citalopram causes dose-related QT prolongation, and ofloxacin may add to this effect. The combination increases the risk of torsades de pointes, particularly with hypokalemia, bradycardia, or higher citalopram doses.
What this interaction means in plain words
Citalopram and Ofloxacin 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.
Citalopram belongs to Central Nervous System; Ofloxacin belongs to Anti Bacterial.
Why it happens
Additive inhibition of cardiac repolarizing potassium currents prolonging the QT interval.
What to do
Prefer a non-QT-prolonging antibiotic. If the combination is necessary, check an ECG, correct electrolytes, and keep citalopram at or below the recommended maximum dose.
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 Ofloxacin
- Ofloxacin + Thioridazine Contraindicated
- Adagrasib + Ofloxacin Major
- Amiodarone + Ofloxacin Major
- Amisulpride + Ofloxacin Major
- Anagrelide + Ofloxacin Major
- Arsenic trioxide + Ofloxacin Major
Other interactions of Citalopram
- Cisapride + Citalopram Contraindicated
- Citalopram + Dronedarone Contraindicated
- Citalopram + Escitalopram Contraindicated
- Citalopram + Isocarboxazid Contraindicated
- Citalopram + Methylene blue Contraindicated
- Citalopram + Phenelzine Contraindicated
Frequently asked questions
Can I take Citalopram with Ofloxacin?
MediHelp rates the interaction as major. Citalopram and Ofloxacin 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. Citalopram causes dose-related QT prolongation, and ofloxacin may add to this effect. The combination increases the risk of torsades de pointes, particularly with hypokalemia, bradycardia, or higher citalopram doses.
How serious is the interaction between Citalopram and Ofloxacin?
MediHelp rates it major, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Prefer a non-QT-prolonging antibiotic. If the combination is necessary, check an ECG, correct electrolytes, and keep citalopram at or below the recommended maximum dose.
What other medicines interact with Ofloxacin?
MediHelp also lists interactions of Ofloxacin with, for example, Thioridazine, Adagrasib, Amiodarone. The full list is on the Ofloxacin page.
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