Ondansetron is a medication used to prevent nausea and vomiting caused by various conditions. Here are some of the uses of ondansetron:

• Cancer chemotherapy: Ondansetron is used to prevent nausea and vomiting caused by cancer chemotherapy.

• Radiation therapy: Ondansetron is used to prevent nausea and vomiting caused by radiation therapy.

• Surgery: Ondansetron is used to prevent nausea and vomiting that may occur after surgery.

Ondansetron works by blocking substances in the body that can trigger nausea and vomiting. It is available in various forms, including tablets, rapidly disintegrating tablets, films, and oral solutions. The first dose of ondansetron is usually taken 30 minutes before the start of chemotherapy, 1 to 2 hours before the start of radiation therapy, or 1 hour before surgery. Additional doses may be taken one to three times a day during chemotherapy or radiation therapy and for 1 to 2 days after the end of treatment.

It is important to follow the directions on the prescription label carefully and take ondansetron exactly as directed. Do not take more or less of it or take it more often than prescribed by your doctor. Ondansetron may cause side effects, and it is important to report any unusual symptoms to your healthcare provider.