What Is Ondansetron (Zofran)?

Ondansetron (Zofran) is a prescription medicine used to treat nausea and vomiting. It is primarily used to treat nausea and vomiting that occur due to surgery, chemotherapy, and radiation. The medication is available in several forms, including as a liquid, orally disintegrating tablet, regular tablet, and intravenous solution. Tablets of ondansetron typically come in strengths of either four or eight milligrams. Patients on ondansetron should inform their doctor as soon as they can if they experience any unusual or worrying symptoms after taking it.