Metoclopramide and Cariprazine: Interaction Details
AI-assisted, pharmacist-reviewed · AI content regenerated Jul 16, 2026 · Source data updated Jul 16, 2026 · Sources: FDA labeling, DDInter 2.0, cited literature
Metoclopramide
No brand names on recordCariprazine
How we grade severity & evidence
Severity levels
- Contraindicated: These should generally not be used together.
- Major: Potentially serious — often needs a change or close monitoring.
- Moderate: Can be significant — usually manageable with monitoring.
- Minor: Usually limited clinical impact.
Evidence grades
- Established: Well documented — supported by controlled studies or strong clinical data.
- Probable: Good supporting evidence, though not definitively proven.
- Suspected: Some evidence suggests this interaction, but it is not well established.
- Possible: Limited or conflicting evidence; the interaction may occur.
- Theoretical: Predicted from the drugs' pharmacology; not yet confirmed in people.
Ratings come from the documented interaction literature and are reviewed by a pharmacist. They describe the documented risk of the combination, not what will necessarily happen to you — your dose, timing, and health picture all matter.
Both metoclopramide (for nausea and stomach issues) and cariprazine (Vraylar, for mood and psychosis) can affect the same brain chemical, dopamine, by blocking it. When you take them together, that blocking effect can add up.
This raises the chance of movement problems, like muscle stiffness, restlessness, tremors, or repetitive movements, and a rare but serious reaction called neuroleptic malignant syndrome (high fever, sweating, confusion, and stiff muscles). Because of this, using them together is generally avoided. The good news is your care team knows how to handle this. Please talk with your pharmacist or doctor about the safest plan for you, and don't stop either medicine on your own.
Effect: Additive dopamine (D2) antagonism increasing risk of extrapyramidal symptoms (EPS), tardive dyskinesia, and neuroleptic malignant syndrome (NMS).
- Mechanism: Both are central D2 blockers; metoclopramide adds antidopaminergic burden to cariprazine's antipsychotic activity. Neither is a prodrug relevant here. Additive PD effect, not a PK interaction.
- Direction: Increased antidopaminergic/adverse effect.
- Severity/Evidence: Labeled contraindicated; evidence theoretical. Onset unspecified.
- Management: Injectable metoclopramide with other EPS-causing agents is contraindicated; avoid antipsychotics with oral metoclopramide. If unavoidable, monitor closely for EPS/NMS (fever, diaphoresis, rigidity, confusion). Discontinue both and treat if symptoms emerge.
What happens
An increased risk of extrapyramidal reactions and neuroleptic malignant syndrome
Interaction Deep Dive
Injectable metoclopramide must not be given alongside other agents that are prone to producing extrapyramidal reactions1. In patients taking oral metoclopramide, antipsychotics should be avoided because of the potential for tardive dyskinesia, additional extrapyramidal symptoms, and neuroleptic malignant syndrome. Should combined treatment be needed, watch patients carefully for indications of extrapyramidal reactions or neuroleptic malignant syndrome (fever, sweating, confusion, muscle stiffness). If such symptoms develop, stop both metoclopramide and the antipsychotic and provide medical management2.
Why it happens (mechanism)
Unknown
How to manage this interaction
Your care team will usually try to avoid combining these two because their effects on dopamine add up. Injectable metoclopramide with drugs like cariprazine is considered off-limits, and antipsychotics are generally avoided in people taking oral metoclopramide.
- Keep taking both exactly as prescribed unless your doctor or pharmacist tells you otherwise, and never stop suddenly on your own.
- Ask whether a different anti-nausea option might be safer for you.
- Watch for and report right away: muscle stiffness, tremors, restlessness, repetitive movements, fever, sweating, or confusion.
Your team can manage this by choosing alternatives or monitoring you closely.
Management is individual — confirm any change with your pharmacist or prescriber.
Common questions
Can I take Metoclopramide and Cariprazine together?
Combining metoclopramide and cariprazine adds up their dopamine-blocking effects and raises the risk of movement disorders and neuroleptic malignant syndrome, so it is generally avoided. Talk to your pharmacist or doctor before using both, and report any muscle stiffness, fever, sweating, or confusion right away. Always confirm with your pharmacist or prescriber before making any change.
How serious is the Metoclopramide and Cariprazine interaction?
It is rated contraindicated. These should generally not be used together.
How quickly could this interaction happen?
The documented onset is "unspecified". The timing of this interaction is not well characterized.
How is the Metoclopramide and Cariprazine interaction managed?
Your care team will usually try to avoid combining these two because their effects on dopamine add up. Injectable metoclopramide with drugs like cariprazine is considered off-limits, and antipsychotics are generally avoided in people taking oral metoclopramide. Keep taking both exactly as prescribed unless your doctor or pharmacist tells you otherwise, and never stop suddenly on your own. Ask whet… Management is individual — always follow your own care team's guidance.
How strong is the evidence for this interaction?
The evidence is graded "theoretical". Predicted from the drugs' pharmacology; not yet confirmed in people.
From our Q&A
Real reader questions about these medications, each personally answered by our pharmacist:
Questions for your pharmacist
- Does my dose of Metoclopramide or Cariprazine need adjusting while I take them together?
- What symptoms should prompt me to call you or my prescriber right away?
- Does the timing of my doses matter for this combination?
- Is there a safer alternative to one of these medications for me?
References (2)
- Product Information: Metoclopramide hydrochloride intravenous, intramuscular injection, metoclopramide hydrochloride intravenous, intramuscular injection. Fresenius Kabi (per DailyMed), Lake Zurich, IL, 2016. DailyMed
- Product Information: REGLAN(R) oral tablets, metoclopramide oral tablets. ANI Pharmaceuticals, Inc. (per FDA), Baudette, MN, 2017. DailyMed
Keep reading about Metoclopramide
Keep reading about Cariprazine
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major · moderate · minor — check everything you take with our drug–supplement interaction checker.
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