Ondansetron (Nausea & Vomiting)

Overview

Nausea and vomiting are among the most common travel-related complaints, whether caused by motion sickness, foodborne illness, traveler's diarrhea, or medication side effects. Having a reliable antiemetic in your travel kit ensures you can manage symptoms quickly without needing to find a pharmacy abroad.

Ondansetron works by blocking serotonin (5-HT3) receptors that trigger the vomiting reflex. It's available as an orally disintegrating tablet (ODT) that dissolves on the tongue without water — particularly useful when swallowing pills is difficult due to active nausea.

Ondansetron is commonly co-prescribed alongside antibiotics for traveler's diarrhea, as nausea and vomiting often accompany gastrointestinal infections. The FDA-approved labeling notes it should be used with caution in individuals with certain heart rhythm disorders (QT prolongation).

Wandr Health vs. a traditional travel clinic

Other travel medications

Frequently asked questions