Here are three remedies in order of effectiveness. One is dramamine, the mildest, and it does also make you drowsy. Two is take 3 ginger capsules. Clinical trials show it works better than dramamine. And three is Bonine (the drug is meclizine). It just came over the counter a year or two ago, used to be prescription only. I can now go on boats and go diving! I used to be incapacitated by motion sickness. Take one the night before, and one an hour or two before the "event". It lasts 24 hours.
Lastly, if I were you I would skip straight to the strong stuff, it is so effective. As a side-effect it is a decongestant so it keeps your ears clear. This is great for diving and flying.