Question: what are drugs for vomiting?
Answer: Granisetron, ondansetron, and palonosetron - these medicines work by blocking a chemical called serotonin (5-HT) in the gut, and the brain. Serotonin (5-HT) has an action in the gut and the brain to cause nausea. These medicines are useful for controlling nausea and vomiting caused by chemotherapy.