Gastroenterology · 5-HT₃ antagonist
Ondansetron
Dose
4–8 mg IV/PO q8h
Use
Nausea/vomiting (chemo, post-op, gastroenteritis).
Monitoring
ECG (QTc, esp. with other QT drugs).
Side effects
- • Headache
- • Constipation
- • QT prolongation
Always confirm dose against your local formulary / BNF before prescribing.
