Drug interactions
Chlorpromazine + Ibutilide
Severity: Contraindicated
Chlorpromazine and Ibutilide: contraindicated 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 agents prolong repolarization, and ibutilide already carries a substantial risk of torsades de pointes. Adding chlorpromazine increases the likelihood of life-threatening ventricular arrhythmia.
What this interaction means in plain words
Chlorpromazine and Ibutilide 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.
Chlorpromazine belongs to Central Nervous System; Ibutilide belongs to Cardiovascular.
Why it happens
Additive QT prolongation from cardiac potassium channel blockade.
What to do
Avoid giving ibutilide to patients taking chlorpromazine; use an alternative cardioversion strategy or hold the phenothiazine as appropriate.
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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Other interactions of Chlorpromazine
- Chlorpromazine + Dofetilide Contraindicated
- Chlorpromazine + Dronedarone Contraindicated
- Chlorpromazine + Droperidol Contraindicated
- Chlorpromazine + Metrizamide Contraindicated
- Chlorpromazine + Panobinostat Contraindicated
- Chlorpromazine + Pimozide Contraindicated
Other interactions of Ibutilide
- Amiodarone + Ibutilide Contraindicated
- Amisulpride + Ibutilide Contraindicated
- Clarithromycin + Ibutilide Contraindicated
- Desipramine + Ibutilide Contraindicated
- Dolasetron + Ibutilide Contraindicated
- Dronedarone + Ibutilide Contraindicated
Frequently asked questions
Can I take Chlorpromazine with Ibutilide?
MediHelp rates the interaction as contraindicated. Chlorpromazine and Ibutilide 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 agents prolong repolarization, and ibutilide already carries a substantial risk of torsades de pointes. Adding chlorpromazine increases the likelihood of life-threatening ventricular arrhythmia.
How serious is the interaction between Chlorpromazine and Ibutilide?
MediHelp rates it contraindicated, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Avoid giving ibutilide to patients taking chlorpromazine; use an alternative cardioversion strategy or hold the phenothiazine as appropriate.
What other medicines interact with Chlorpromazine?
MediHelp also lists interactions of Chlorpromazine with, for example, Dofetilide, Dronedarone, Droperidol. The full list is on the Chlorpromazine page.
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