Drug interactions
Fluphenazine + Zotepine
Severity: Major
Fluphenazine and Zotepine: 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
Combining two antipsychotics increases the risk of extrapyramidal symptoms, sedation, hypotension and neuroleptic malignant syndrome. Zotepine also lowers the seizure threshold and prolongs the QT interval, adding to the risk.
What this interaction means in plain words
Fluphenazine and Zotepine 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 D2 antagonism, sedation and QT effects, with zotepine lowering the seizure threshold.
What to do
Avoid combining where possible; if necessary, use the lowest doses and monitor ECG, movement symptoms and temperature. Watch for seizures.
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 Fluphenazine
- Arsenic trioxide + Fluphenazine Contraindicated
- Dofetilide + Fluphenazine Contraindicated
- Fluphenazine + Ibutilide Contraindicated
- Fluphenazine + Pimozide Contraindicated
- Adagrasib + Fluphenazine Major
- Alfentanil + Fluphenazine Major
Frequently asked questions
Can I take Fluphenazine with Zotepine?
MediHelp rates the interaction as major. Fluphenazine and Zotepine 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. Combining two antipsychotics increases the risk of extrapyramidal symptoms, sedation, hypotension and neuroleptic malignant syndrome. Zotepine also lowers the seizure threshold and prolongs the QT interval, adding to the risk.
How serious is the interaction between Fluphenazine and Zotepine?
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 where possible; if necessary, use the lowest doses and monitor ECG, movement symptoms and temperature. Watch for seizures.
What other medicines interact with Fluphenazine?
MediHelp also lists interactions of Fluphenazine with, for example, Arsenic trioxide, Dofetilide, Ibutilide. The full list is on the Fluphenazine page.
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