Dimenhydrinate is a medication commonly used to prevent and treat nausea, vomiting, and dizziness caused by motion sickness. It works by blocking signals in the brain that trigger these symptoms. Dimenhydrinate is often taken before traveling to help reduce the likelihood of experiencing motion sickness. This medication is available over-the-counter and comes in various forms, including tablets and chewable tablets. While generally safe for most people, it can cause side effects such as drowsiness, dry mouth, and blurred vision. It is important to follow dosage instructions and consult a healthcare professional if needed.