I’m a pharmacist with terrible motion sickness. Like the above poster mentioned, Transdermal-Scop (scopolamine) is the most effective motion sickness medication we have on the market in the US when put to clinical studies. It is prescription only. It is important that she applies the patch behind her ear at least 4 hours before riding any rides. It can be left on for 72 hours. Some people can not tolerate the patch due to drowsiness, dry mouth, and blurry vision. Other over the counter remedies are dimenhydrinate (brand name: Dramamine) or Meclizine (Bonine or Dramamine N). It is important to check the ingredient label for the active medication which is dimenhydrinate or meclizine). Brand names change. Dimenhydrinate and meclizine both can cause drowsiness, dry mouth, and blurry vision. Benadryl (diphenhydramine) can also be used. These should be taken at least an hour before riding any rides. There are many people who find their own remedies such as ginger, sucking on apples and lemons, wrist bands, and counter maneuvers like sitting in the front of a roaster. In clinical studies, these remedies do not stand up very well, but may work for some people. It is also very possible that no medication works to combat her motion sickness, even Transderm Scop. The remedies we have today are not effective for all motion sickness sufferers. I find my vacation much more enjoyable if I avoid the rides that make me sick. Space Mountain once made me lose 24 hours of our trip!