Q. Are antiemetics effective?

An antiemetic is a medication that relieves nausea and vomiting. A comprehensive study found that serotonin antagonists (ondansetron granisetron and tropisetron) as well as dexamethasone droperidol and cyclizine were more effective than placebo in treating postoperative nausea and vomiting. Certain antiemetics may need to be avoided depending on the clinical circumstances.