The problem with Dramamine is that it's an anti-histamine (like benadryl), so if an anti-histamine makes you sleepy, Dramamine is going to do exactly the same.
Bonine (meclazine) gets mixed results - it's a histamine receptor blocker (pretty much the same as an antihistamine). My best friend swears by it, but if I even see the box, I'm out cold. Also, it enhances the effects of alcohol, so if you're drinking and taking bonine, you're going to be really sleepy.
Check with your MD, or try the bracelets. Or, if you're not really that prone to motion sickness, just keep some bread or other starchy food around and if you get a little ooky, eat something.