I have never suffered from carsickness so I cannot give advice that I know works. However, I did come across an article offering a simple solution. If you suffer this problem, perhaps you might want to try this. Try sucking on lemon candy. It is said to up saliva, which contains digestive enzymes that ease nausea.
According to Kings College of London researchers, chewing gum can reduce heartburn-related symptoms. Chewing gum (sugar-free!) boosts the production of saliva which is an alkaline that helps neutralize stomach acid. More saliva also means more swallowing. More swallowing stimulates the muscle contractions that help digest food, according to the researchers. Also, a piece of hard candy or a lozenge may have the same effect.
