I ran across this on Facebook (thanks, Kathy! - right?) - it tells us what many of us know, namely that there is no known true cure for morning sickness!
No Cure for Morning Sickness Yet
Morning sickness is a Catch-22 issue. On the one hand, it's an extremely widespread, common condition, and anyone who successfully addressed the issue would immediately make his fortune. On the other hand, no one is his right mind is going to experiment on pregnant women, both from a (hopefully!) moral standpoint (it's just too risky), or a practical (financial) viewpoint. So the issue of morning sickness is not likely to receive any in-depth attention any time soon!