Used primarily to prevent nausea and vomiting caused by chemotherapy, radiation therapy, or surgery. It works by blocking the action of serotonin, a natural substance in the body that can trigger nausea and vomiting. Particularly effective in managing acute and delayed chemotherapy-induced nausea and vomiting. Also utilized in postoperative settings to improve patient comfort after anesthesia. Its selective action on 5-HT3 receptors makes it a well-tolerated option with fewer side effects compared to older antiemetics.