The bestest cure for car /boat/ airplane - motion sickness is a patch called SCOPERDERM TTs 1.5 , 72 hrs relief per patch , contains 1.5mg of scopolamine , only problem is that they are not available in Australia , we get ours sent over from an online pharmacy in NewZealand ,is the only thing that has worked for our young fella [now 13] who throws up if in a car /boat /bus /airplane /seaworld rides etc.