Everybody's body reacts to medicine differently. What may work for one, may not have any effect at all on another...that's why medication is so tricky in my opinion.
I'm with Louise on this one...our answer, however much I want it to be isn't in a pill, but in how we control our anxiety...wouldn't it be nice if we could just turn off nausea/v* once and for all? Like a button on a remote??? Unfortunately, it doesn't work that way...