I have extreme motion sickness. I can get sick from playing video games. I have prescription motion sickness pills that help when I travel but if I am in a boat, its bad news. I have lots of sinus problems and inner ear problems as well and my sense of balance is not great--all part of my motion sickness issues.Meclazine is the best motion sickness pill I have found.I don't think it has anything to do with my IBS. I developed these problems when I was 12 or so and I have had my IBS since 6 or earlier.P.