Zofran (ondansetron) is an anti-nausea drug developed by GlaxoSmithKline to treat nausea and vomiting in patients undergoing chemotherapy and surgery. It blocks the actions of chemicals in the body that can trigger nausea and vomiting.
Zofran is considered a Category B drug for use in pregnant women by the United States Food and Drug Administration (FDA), which indicates there is little controlled data on the effect of the drug on an unborn child.