Drug interactions
Paliperidone + Quetiapine
Severity: Moderate
Paliperidone and Quetiapine: 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
Using two antipsychotics increases the risk of sedation, extrapyramidal symptoms, orthostatic hypotension and QT prolongation. Combined dopamine blockade may also raise the risk of neuroleptic malignant syndrome.
What this interaction means in plain words
Paliperidone and Quetiapine 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.
Paliperidone belongs to Central Nervous System; Quetiapine belongs to Central Nervous System.
Why it happens
Additive dopamine D2 antagonism, sedation and QT prolongation.
What to do
Avoid routine antipsychotic polypharmacy; if needed, use the lowest effective doses and monitor ECG, movement symptoms, sedation and blood pressure.
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 Paliperidone
- Ibutilide + Paliperidone Contraindicated
- Paliperidone + Pimozide Contraindicated
- Paliperidone + Vandetanib Contraindicated
- Adagrasib + Paliperidone Major
- Amiodarone + Paliperidone Major
- Amisulpride + Paliperidone Major
Other interactions of Quetiapine
- Adagrasib + Quetiapine Major
- Amiodarone + Quetiapine Major
- Amisulpride + Quetiapine Major
- Amoxapine + Quetiapine Major
- Anagrelide + Quetiapine Major
- Apalutamide + Quetiapine Major
Frequently asked questions
Can I take Paliperidone with Quetiapine?
MediHelp rates the interaction as moderate. Paliperidone and Quetiapine 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. Using two antipsychotics increases the risk of sedation, extrapyramidal symptoms, orthostatic hypotension and QT prolongation. Combined dopamine blockade may also raise the risk of neuroleptic malignant syndrome.
How serious is the interaction between Paliperidone and Quetiapine?
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 routine antipsychotic polypharmacy; if needed, use the lowest effective doses and monitor ECG, movement symptoms, sedation and blood pressure.
What other medicines interact with Paliperidone?
MediHelp also lists interactions of Paliperidone with, for example, Ibutilide, Pimozide, Vandetanib. The full list is on the Paliperidone page.
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