Drug interactions
Metoclopramide intranasal + Perphenazine
Severity: Major
Metoclopramide intranasal and Perphenazine: 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 drugs block dopamine D2 receptors, so together they increase the risk of extrapyramidal symptoms, tardive dyskinesia, and neuroleptic malignant syndrome. Metoclopramide labeling advises avoiding concurrent antipsychotics.
What this interaction means in plain words
Metoclopramide intranasal and Perphenazine 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 central dopamine D2 receptor antagonism.
What to do
Avoid the combination and use a non-dopamine-blocking antiemetic such as ondansetron, with QT considerations in mind. Monitor for movement disorders and rigidity or hyperthermia if both are used.
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 Perphenazine
- Ibutilide + Perphenazine Contraindicated
- Perphenazine + Pimozide Contraindicated
- Perphenazine + Thioridazine Contraindicated
- Adagrasib + Perphenazine Major
- Alfentanil + Perphenazine Major
- Amiodarone + Perphenazine Major
Frequently asked questions
Can I take Metoclopramide intranasal with Perphenazine?
MediHelp rates the interaction as major. Metoclopramide intranasal and Perphenazine 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 drugs block dopamine D2 receptors, so together they increase the risk of extrapyramidal symptoms, tardive dyskinesia, and neuroleptic malignant syndrome. Metoclopramide labeling advises avoiding concurrent antipsychotics.
How serious is the interaction between Metoclopramide intranasal and Perphenazine?
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 the combination and use a non-dopamine-blocking antiemetic such as ondansetron, with QT considerations in mind. Monitor for movement disorders and rigidity or hyperthermia if both are used.
What other medicines interact with Perphenazine?
MediHelp also lists interactions of Perphenazine with, for example, Ibutilide, Pimozide, Thioridazine. The full list is on the Perphenazine page.
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