Drug interactions
Haloperidol + Zotepine
Severity: Moderate
Haloperidol and Zotepine: 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 are antipsychotics with dopamine blocking activity, so using them together increases the risk of extrapyramidal symptoms, tardive dyskinesia and neuroleptic malignant syndrome. Sedation, QT prolongation and seizure risk may also be additive, as zotepine lowers the seizure threshold.
What this interaction means in plain words
Haloperidol and Zotepine 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.
Why it happens
Additive dopamine D2 receptor antagonism and additive sedative and QT-prolonging effects.
What to do
Avoid antipsychotic polypharmacy where possible. If combined, use the lowest effective doses and monitor for movement disorders, sedation, ECG QTc and signs of neuroleptic malignant syndrome.
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 Haloperidol
- Dofetilide + Haloperidol Contraindicated
- Dronedarone + Haloperidol Contraindicated
- Haloperidol + Ibutilide Contraindicated
- Haloperidol + Levoketoconazole Contraindicated
- Haloperidol + Panobinostat Contraindicated
- Haloperidol + Pimozide Contraindicated
Frequently asked questions
Can I take Haloperidol with Zotepine?
MediHelp rates the interaction as moderate. Haloperidol and Zotepine 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 are antipsychotics with dopamine blocking activity, so using them together increases the risk of extrapyramidal symptoms, tardive dyskinesia and neuroleptic malignant syndrome. Sedation, QT prolongation and seizure risk may also be additive, as zotepine lowers the seizure threshold.
How serious is the interaction between Haloperidol and Zotepine?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Avoid antipsychotic polypharmacy where possible. If combined, use the lowest effective doses and monitor for movement disorders, sedation, ECG QTc and signs of neuroleptic malignant syndrome.
What other medicines interact with Haloperidol?
MediHelp also lists interactions of Haloperidol with, for example, Dofetilide, Dronedarone, Ibutilide. The full list is on the Haloperidol page.
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