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Ondansetron
Pronounced on-DAN-se-tron
Brand names: Zofran
Type: Antiemetic (anti-nausea, serotonin blocker) · All Digestive (GI) Medicines
What Ondansetron is used for
- Nausea and vomiting from chemotherapy, radiation, and surgery
- Severe stomach flu and other nausea, on clinician judgment
Common side effects
- Headache
- Constipation
- Tiredness
- Dizziness
Important cautions
- Can affect heart rhythm (QT prolongation), especially at high amounts by vein or with other rhythm-affecting medicines
- Can contribute to serotonin syndrome when combined with many serotonergic medicines
How it comes
Tablets, dissolving tablets, liquid, injection (hospital). This guide lists forms only — it never lists strengths or doses.
Related medicines — Digestive (GI) Medicines
Please note: This page is a patient-education summary, not medical advice, and it deliberately contains no doses. Medicines affect everyone differently — always follow your own prescription and talk to your doctor or pharmacist before starting, stopping or changing any medicine.