Drug interactions
Fluphenazine + Paliperidone
Severity: Major
Fluphenazine and Paliperidone: major interaction.
Last updated Sources: US FDA label
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 these antipsychotics increases the risk of extrapyramidal symptoms, sedation, neuroleptic malignant syndrome and QT prolongation with possible torsades de pointes.
What this interaction means in plain words
Fluphenazine and Paliperidone 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.
Fluphenazine belongs to Central Nervous System; Paliperidone belongs to Central Nervous System.
Why it happens
Additive dopamine D2 antagonism and additive QT interval prolongation.
What to do
Avoid antipsychotic polypharmacy where possible. If combined, obtain a baseline and follow-up ECG, keep electrolytes normal and monitor for 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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References
Other interactions of Fluphenazine
- Arsenic trioxide + Fluphenazine Contraindicated
- Dofetilide + Fluphenazine Contraindicated
- Fluphenazine + Ibutilide Contraindicated
- Fluphenazine + Pimozide Contraindicated
- Adagrasib + Fluphenazine Major
- Alfentanil + Fluphenazine Major
Other interactions of Paliperidone
- Ibutilide + Paliperidone Contraindicated
- Paliperidone + Pimozide Contraindicated
- Paliperidone + Vandetanib Contraindicated
- Adagrasib + Paliperidone Major
- Amiodarone + Paliperidone Major
- Amisulpride + Paliperidone Major
Frequently asked questions
Can I take Fluphenazine with Paliperidone?
MediHelp rates the interaction as major. Fluphenazine and Paliperidone 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 these antipsychotics increases the risk of extrapyramidal symptoms, sedation, neuroleptic malignant syndrome and QT prolongation with possible torsades de pointes.
How serious is the interaction between Fluphenazine and Paliperidone?
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 antipsychotic polypharmacy where possible. If combined, obtain a baseline and follow-up ECG, keep electrolytes normal and monitor for movement disorders.
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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