Metoclopramide and Ondansetron: Drug Interaction Guide

Quick answer: This combination requires caution. Metoclopramide and Ondansetron can be used together with adjustments and monitoring.

Interaction severity: Moderate — caution required

How Metoclopramide interacts with Ondansetron

Both agents prolong the QT interval; metoclopramide also has dopamine antagonist activity that potentiates extrapyramidal effects.

What you should do

Avoid routine combination; if required for refractory nausea, obtain baseline ECG, correct electrolytes, and use lowest effective doses.

Key facts

Severity

Moderate — caution required

Mechanism

Both agents prolong the QT interval; metoclopramide also has dopamine antagonist activity that potentiates extrapyramida...

Action

Avoid routine combination; if required for refractory nausea, obtain baseline ECG, correct electrolytes, and use lowest ...

Important medical disclaimer: This page provides educational information about drug interactions for general reference. It is not a substitute for professional medical advice, diagnosis, or treatment. Always discuss your specific medications with a qualified healthcare provider before starting, stopping, or changing any treatment. About our editorial team.

Frequently asked questions

Can I take Metoclopramide and Ondansetron together?

With caution. Avoid routine combination; if required for refractory nausea, obtain baseline ECG, correct electrolytes, and use lowest effective doses.

What is the severity of this interaction?

The interaction between Metoclopramide and Ondansetron is classified as Moderate — caution required. Both agents prolong the QT interval; metoclopramide also has dopamine antagonist activity that potentiates extrapyramidal effects.

What should I do if I'm prescribed both?

Avoid routine combination; if required for refractory nausea, obtain baseline ECG, correct electrolytes, and use lowest effective doses. Always consult your prescribing clinician — do not stop or change medications without medical guidance.

Last reviewed: by iMedic Medical Editorial Team. Our editorial process.