Drug interactions
Moxifloxacin + Pimozide
Severity: Contraindicated
Moxifloxacin and Pimozide: contraindicated interaction.
Last updated Sources: US FDA label
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 prolong the QT interval, and together they raise the risk of torsades de pointes and sudden cardiac death. Pimozide labeling advises against combination with other QT-prolonging agents.
What this interaction means in plain words
Moxifloxacin and Pimozide are not normally used together. Taking them at the same time is expected to cause harm or make one of them unsafe, so a different medicine is usually chosen for one of the two.
Moxifloxacin belongs to Anti Bacterial; Pimozide belongs to Central Nervous System.
Why it happens
Additive QT prolongation through blockade of cardiac hERG potassium channels.
What to do
Do not combine; choose a non-QT-prolonging antibiotic during pimozide therapy.
What to ask your pharmacist
- Is there an alternative to one of these two medicines for me?
- If both are essential, who is monitoring me and how often?
- Which symptoms mean I should stop and seek help straight away?
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References
Other interactions of Moxifloxacin
- Amiodarone + Moxifloxacin Contraindicated
- Arsenic trioxide + Moxifloxacin Contraindicated
- Disopyramide + Moxifloxacin Contraindicated
- Dofetilide + Moxifloxacin Contraindicated
- Dronedarone + Moxifloxacin Contraindicated
- Droperidol + Moxifloxacin Contraindicated
Other interactions of Pimozide
- Adagrasib + Pimozide Contraindicated
- Amiodarone + Pimozide Contraindicated
- Amisulpride + Pimozide Contraindicated
- Amitriptyline + Pimozide Contraindicated
- Amoxapine + Pimozide Contraindicated
- Anagrelide + Pimozide Contraindicated
Frequently asked questions
Can I take Moxifloxacin with Pimozide?
MediHelp rates the interaction as contraindicated. Moxifloxacin and Pimozide are not normally used together. Taking them at the same time is expected to cause harm or make one of them unsafe, so a different medicine is usually chosen for one of the two. Both drugs prolong the QT interval, and together they raise the risk of torsades de pointes and sudden cardiac death. Pimozide labeling advises against combination with other QT-prolonging agents.
How serious is the interaction between Moxifloxacin and Pimozide?
MediHelp rates it contraindicated, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Do not combine; choose a non-QT-prolonging antibiotic during pimozide therapy.
What other medicines interact with Moxifloxacin?
MediHelp also lists interactions of Moxifloxacin with, for example, Amiodarone, Arsenic trioxide, Disopyramide. The full list is on the Moxifloxacin page.
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