Drug interactions
Levofloxacin + Quetiapine
Severity: Moderate
Levofloxacin and Quetiapine: 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
Both drugs can prolong the QT interval, so co-administration may increase the risk of torsades de pointes. The risk is greater in overdose, with electrolyte disturbance or with underlying cardiac disease.
What this interaction means in plain words
Levofloxacin and Quetiapine 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.
Levofloxacin belongs to Anti Bacterial; Quetiapine belongs to Central Nervous System.
Why it happens
Additive prolongation of ventricular repolarization through potassium channel blockade.
What to do
Correct hypokalemia and hypomagnesemia and obtain a baseline ECG in patients with risk factors. Monitor the QTc and consider an alternative antibiotic if prolongation develops.
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 Levofloxacin
- Dronedarone + Levofloxacin Contraindicated
- Ibutilide + Levofloxacin Contraindicated
- Levofloxacin + Thioridazine Contraindicated
- Levofloxacin + Vandetanib Contraindicated
- Levofloxacin + Ziprasidone Contraindicated
- Adagrasib + Levofloxacin Major
Other interactions of Quetiapine
- Adagrasib + Quetiapine Major
- Amiodarone + Quetiapine Major
- Amisulpride + Quetiapine Major
- Amoxapine + Quetiapine Major
- Anagrelide + Quetiapine Major
- Apalutamide + Quetiapine Major
Frequently asked questions
Can I take Levofloxacin with Quetiapine?
MediHelp rates the interaction as moderate. Levofloxacin and Quetiapine 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. Both drugs can prolong the QT interval, so co-administration may increase the risk of torsades de pointes. The risk is greater in overdose, with electrolyte disturbance or with underlying cardiac disease.
How serious is the interaction between Levofloxacin and Quetiapine?
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 and obtain a baseline ECG in patients with risk factors. Monitor the QTc and consider an alternative antibiotic if prolongation develops.
What other medicines interact with Levofloxacin?
MediHelp also lists interactions of Levofloxacin with, for example, Dronedarone, Ibutilide, Thioridazine. The full list is on the Levofloxacin page.
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