Look for sea sickness remedies, you should find ginger chewing gum. Chewing gum itself reduces motion sickness and at least if you follow this study peppermint is actually more effective -- though ginger itself (without the chewing part) is known to be effective so have you salt shaker ready to sprinkle on their sample size.

Try stuff and see what works for you, it's not like you're injecting chemotherapy meds.