Wrist bands (both kinds) works great
We have 3 pairs of non-electric wrist bands for my wife and guests. Each pair has 2 elastic bands with a round button facing your skin. They work great most of the time. When the seas gets too rough, my wife put on the electric ones, and gets zapped every few seconds. They work every time.Just remember that any pills, or things that you eat or drink, won't work if you are alreadey sick. Since you won't be able to keep it down. So you will have to take them "before" you get sick. This is why the wrist bands works so great. If you are already feeding the fishes, you can put them on, and you will feel fine pretty quickly.