Anti-emetics are medications used to prevent or treat nausea and vomiting. They work by blocking signals in the brain that trigger these symptoms, making them helpful for people undergoing treatments like chemotherapy or surgery. Common types of anti-emetics include ondansetron, metoclopramide, and promethazine. These medications can be taken in various forms, such as tablets, injections, or patches. While generally safe, they may have side effects like drowsiness or dizziness. It's important to consult a healthcare professional before using anti-emetics to ensure they are appropriate for individual needs and conditions.