Non-drowsy dramamine makes me drowsy no matter what I'm doing. We tried it on our first trip to Disney and my DH & I spent half the time trying to wake up.
At the recommendation of someone on this board (before the MythBusters episode), we tried ginger. My DH, DD21, DD18 and I now swear by it. No more motion sickness on car rides or airplanes. My DH who wouldn't even attempt ANY kind of motion ride now loves Splash Mountain, Space Mountain, Big Thunder Mountain. He's working his way up to trying some of the bigger rides. Kind of hard to do after never being able to ride them because of motion sickness (he's always suffered - even as a child).
We start taking ginger tablets the day before our flight. We take one tablet in the morning and one in the evening. We continue this until we return from the trip.
Ginger tablets rock!!!