I use Bonine all of the time and it works wonders! However, I take it a differently than the directions state. I take it the day before I need it as well as on the days I need it. I take one in the morning and one at night (about 12 hours apart). I do not have any side effects- no drowiness or anything. I have also used ginger candy, but that only takes care of nausea. It won't help with any kind of dizziness or vertigo.
I love it! It effects everyone differently. My hubby can't take it bc it makes him dizzy and lightheaded (but it keeps him from getting sick!). I'd say try it on a day when you have nothing gong on just to see how it makes you feel.