How to prevent seasickness on a ferry boat?

Diet, meds. The nausea of motion sickness can sometimes be avoided with diet. Simple carbohydrates in macaroni or other pasta or foods like rice or vegetables are less likely to bring nausea than heavy fatty foods. Milk, cheese, fried foods take longer to process & more associated with problems. Dramamine (dimenhydrinate) is a otc product that can be given @ 25-50mg every 6-8h.