Drug interactions
Benperidol + Chlorpromazine
Severity: Major
Benperidol and Chlorpromazine: 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
Both are dopamine-blocking antipsychotics, so combined use raises the risk of extrapyramidal symptoms, sedation, QT prolongation, and neuroleptic malignant syndrome. Antipsychotic polypharmacy rarely offers clear benefit.
What this interaction means in plain words
Benperidol and Chlorpromazine 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.
Why it happens
Additive dopamine D2 receptor antagonism and additive sedative and QT-prolonging effects.
What to do
Avoid combining antipsychotics when possible and use a single agent at an optimized dose. If combined, monitor for extrapyramidal symptoms, fever, rigidity, and ECG changes.
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 Chlorpromazine
- Chlorpromazine + Dofetilide Contraindicated
- Chlorpromazine + Dronedarone Contraindicated
- Chlorpromazine + Droperidol Contraindicated
- Chlorpromazine + Ibutilide Contraindicated
- Chlorpromazine + Metrizamide Contraindicated
- Chlorpromazine + Panobinostat Contraindicated
Frequently asked questions
Can I take Benperidol with Chlorpromazine?
MediHelp rates the interaction as major. Benperidol and Chlorpromazine 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. Both are dopamine-blocking antipsychotics, so combined use raises the risk of extrapyramidal symptoms, sedation, QT prolongation, and neuroleptic malignant syndrome. Antipsychotic polypharmacy rarely offers clear benefit.
How serious is the interaction between Benperidol and Chlorpromazine?
MediHelp rates it major, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Avoid combining antipsychotics when possible and use a single agent at an optimized dose. If combined, monitor for extrapyramidal symptoms, fever, rigidity, and ECG changes.
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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