Drooling is often the first sign of this, though many dogs will throw up without actually ever drooling and others will drool for eons and never throw up. Solutions are several, though which one will work for you is matter of trial and error. Eliminating those often helps. Putting the dog in the car at times when you go nowhere, or just for short jaunts around the block will help ease the nervousness of the dog. Many dogs outgrow this, especially if it occurs in puppyhood.
Many people swear by ginger.
The motion sickness pills do work though. I've had good luck by allowing really nervous dogs to ride in close physical contact with another dog or on a person's lap. Simply feeling secure and supported by another being is enough to relieve the anxiety. Page last updated April 1, 1997.