Hi I did review your concern. This problem is very common in many people. It is known as motion sickness. It is due to very sensitive vestibular system in our inner ear and it causes vomiting with drives especially on rough terrain or hilly areas or where there is lot of side ways movement. There are certain antiemetic patches available that can be applied on skin just 2 hours before the trip and it helps prevent motion sickness like hyosine patches and so on. Also light meals 1 hr before the trip are helpful and also are cheewing peppermint or orange candies do help many people. I hope this helps Wish you all the best Thank you for choosing healthcare magic