Take ondansetron 4 mg exactly as prescribed by your doctor
Swallow the tablet with water
Take it with or without food
If using the orally disintegrating tablet, let it dissolve on your tongue and then swallow
Do not chew, crush, or split the orally disintegrating tablet
Take it at the time your doctor recommends, often before chemotherapy, surgery, or when nausea starts
If you miss a dose, take it when you remember unless it is close to the next dose
Do not take two doses at the same time
Do not take more than the prescribed amount
Seek medical help if you have severe dizziness, fainting, chest pain, or an allergic reaction