A client has been newly diagnosed with breast cancer. The client has been prescribed ondansetron (Zofran), but the client is unsure of the indication for this medication. What is your response as a nurse?

A. Ondansetron does not treat QT interval prolongation. It is used to prevent nausea and vomiting, especially in chemotherapy-induced nausea. B. Ondansetron is not used to treat extrapyramidal symptoms. It is primarily used as an antiemetic. C. Ondansetron is a 5-HT3 receptor antagonist used to prevent nausea and vomiting, especially related to chemotherapy and radiation treatments. D. Ondansetron is not used for diarrhea treatment. It is specifically an antiemetic used to treat nausea and vomiting.