I think I feel worse taking Drammamine than if I just was motion sick. My favorite medicine is from the local all-natural pharmacy. It's Hyland's Homeopathic Motion Sickness "Natural relif for nausea and dizziness due to motion, car sickness, or sea sickness." I stopped in the store before a long trip that would include car, bus, boat, train, plane - and this is what the pharmacist recommended, in addition to chewable ginger tablets. It worked wonders. (I've taken it on its own before, and it worked bette for me than just the ginger tablets.) It's a bit on the expensive side, but then again, I'm buying it in the city at an expensive store, so it may be found cheaper elsewhere.
You dissolve 2-3 tablets in your mouth every four hours or so. It says the active ingredients are Nux Vomica, Tabacum, Petroleum, and Cocculus Indicus and the in active ingredient is lactoce.
Hope this helps! I'm always looking for good motion sickness remedies!