Try these: (The wrist bands)
http://www.purpleturtle.co.uk/acatal...ckness.html#a7
My wife gets car sick - puts these on and within a few minutes it goes, I also have had air sickness (not all the time) and wear them when flying - so far have not had any nausia whilst wearing them. You can get them from Aldi (sometimes) and boots. Worth a try for a few quid.