Drug interactions
Benperidol + Pimozide
Severity: Major
Benperidol and Pimozide: 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 potent dopamine antagonists, so combining them raises the risk of extrapyramidal symptoms, sedation, neuroleptic malignant syndrome and QT prolongation. Benefit over a single antipsychotic is rarely established.
What this interaction means in plain words
Benperidol and Pimozide 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 blockade and additive QT-prolonging effects.
What to do
Avoid combining two antipsychotics where possible and use a single agent. If unavoidable, obtain a baseline ECG, correct potassium and magnesium, and monitor for QT prolongation and movement disorders.
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 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 Benperidol with Pimozide?
MediHelp rates the interaction as major. Benperidol and Pimozide 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 potent dopamine antagonists, so combining them raises the risk of extrapyramidal symptoms, sedation, neuroleptic malignant syndrome and QT prolongation. Benefit over a single antipsychotic is rarely established.
How serious is the interaction between Benperidol and Pimozide?
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 two antipsychotics where possible and use a single agent. If unavoidable, obtain a baseline ECG, correct potassium and magnesium, and monitor for QT prolongation and movement disorders.
What other medicines interact with Pimozide?
MediHelp also lists interactions of Pimozide with, for example, Adagrasib, Amiodarone, Amisulpride. The full list is on the Pimozide page.
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