Ginger!!!
I have never got sea sick, though once in 20 - 30' sea's when I was on a 400 foot ship in the Coast Guard, I did not feel real good. But I have taken many of people out before that got sick and they have tried everything. Then a few weeks back, I took a group out that had crystalized Ginger that they took with mints. Said they use to get sea sick all the time, but when the started taking this, they never even got nauseous. They went on to tell me that it has worked for everybody they know that has gotten sea sick before. You might try it. You can get the crystalize Ginger at some groceries stores and all whole foods stores!!!