Ginger slices works for me. I chew them like gum but the taste gets to you after the 3rd slice.
Try chewing some gum (minty flavors) and keep your eyes on the horizon.
Bring food with you, cuz you'll need it after you chum..
If the swells are bad, I will definitely get sick, but i'll just chum and fish on (with snacking in between so I have something to chum)..
Everyone's body reacts differently, hope you find the remedy that works for you.
Good luck and see you guys on the waters.