Thanks what area do you fish?

What seems to always work is to take Bonine which you can buy at any place that sells med's for sea sickness, also take the Bonine the night before you go and take one the morning you depart.
Take a couple with you in case you start to feel bad, take it right then.
There is an item named Q-eze spelling is wrong but that's the pronunciation that if you do get sick just take a few inhales and you will fell a lot better sold at many tackel shops or online, enjoy you trip.

I fish the west coast of Florida tarpon springs area, inshore and offshore