I have used those little wonders many times. I have gone on 2 cruises and one was exceptionally rough. I used the patches religiously (put them on a day before the cruise began). I never felt sleepy. A couple of times I would get a little blurry eyed (one side effect) but it didn't last long with me. They were great. When it was exceptionally rough I would get a little woozy, but never sick. I have also used them at WDW on rides and I was able to go on a couple of rides that I haven't attempted before (Rock & Rollin Rollercoaster). I still am not brave enough to try Mission Space with them, or even body wars (I was sick on that one before using the patch). One of my daughters liked them when she went on her cruise, one didn't care for them. They are sure worth trying. Some people love them, some hate them. You use one patch behind your ear for 3 days, put a new patch behind the other ear after 3 days and remove the first one. If you start not feeling the effect working it may be that the patch has become dislodged or folded over. Ask the doctor for a couple of extra's in case one comes loose before the 3 days is up. Have fun!