Drug interactions
Ciprofloxacin + Lithium
Severity: Moderate
Ciprofloxacin and Lithium: 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
Lithium has been associated with QT prolongation and ciprofloxacin has a small QT effect, so the combination may add to arrhythmia risk. The risk is greater with lithium toxicity, renal impairment, dehydration or electrolyte disturbances.
What this interaction means in plain words
Ciprofloxacin and Lithium 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.
Ciprofloxacin belongs to Anti Bacterial; Lithium belongs to Central Nervous System.
Why it happens
Additive effects on cardiac repolarization leading to QT prolongation.
What to do
Monitor ECG in patients with cardiac risk factors and keep potassium and magnesium normal. Check serum lithium levels if renal function or hydration is in doubt.
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?
Pro+ members
Unlock the full page
Create an account and start a Pro+ trial to unlock the full management advice for Ciprofloxacin and Lithium, the additional notes, the evidence detail and the whole-prescription interaction checker.
- Full clinical management advice
- Additional notes
- Evidence detail
- Interaction checker for a whole prescription
Try Pro+ free for 7 days on the web. No card needed.
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 Lithium
- Lithium + Thioridazine Contraindicated
- Lithium + Vandetanib Contraindicated
- Aceclofenac + Lithium Major
- Acemetacin + Lithium Major
- Amisulpride + Lithium Major
- Amlodipine-benazepril + Lithium Major
Frequently asked questions
Can I take Ciprofloxacin with Lithium?
MediHelp rates the interaction as moderate. Ciprofloxacin and Lithium 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. Lithium has been associated with QT prolongation and ciprofloxacin has a small QT effect, so the combination may add to arrhythmia risk. The risk is greater with lithium toxicity, renal impairment, dehydration or electrolyte disturbances.
How serious is the interaction between Ciprofloxacin and Lithium?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Monitor ECG in patients with cardiac risk factors and keep potassium and magnesium normal. Check serum lithium levels if renal function or hydration is in doubt.
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.
Full monographs, dosing and an interaction checker in the MediHelp app
Open the complete reference, check multi-drug interactions and use dosing tools in the MediHelp app.
