Hit or Miss...then there is always Bonine
I carry two on board. My wife, who battles seasickness, tried them during a lengthly passage. No help, but she was using scop patches simultaneously and we theorized that somehow they were working at odds with one another. There is always Bonine...seems to work for everyone....and puts a pain in the ass crew member to sleep!! I have had great luck with reduced (less that a whole pill) doses of Bonine to combat the sleepiness. Once you find your right level, the world is a much better place. Remember, the pill manufacturer wants you to take the whole pill so you will buy more pills sooner. I am 6'1" 200 lbs and a whole Bonine is too much for me.