I had my first and very severe episode of vertigo about 9 months before a family trip to WDW. I was concerned about certain rides triggering another bout...I proactively took medication prior to my two days at the Studios. I wanted to ride ToT and RnRC. I did not have any trouble. At the other parks I closed my eyes on a few motion sensitive things (ex. the spiral tunnel on Buzz, parts of Mickey Philharmagic). I also did not ride MS or Star Tours but I have never ridden them before due to motion sickness concerns. I have taken the chicken exit on both so I could walk thru, I did ride Soarin with no trouble and also Everest.