Some people have an extraordinarily difficult time with it.
If you are one of the unfortunate individuals that have a very difficult time with it, there are some strategies you can use to help control the problem. Don't eat a heavy meal or drink alcohol the night before leaving on a trip. Avoid strong odors from food, tobacco, perfume, gasoline or diesel fumes while traveling. Recline in your seat as much as possible. Don't read while traveling Focus your eyes on the horizon , or even some point inside the vehicle .