My friend Cindy Jones, at SageScript, just posted a piece of research proving what many of us already know, that Ginger helps to prevent nausea.
Sagescript Institute & Colorado Aromatics: Ginger helps prevent nausea due to chemotherapy
Now, the research cited indicates internal use of the spice, either in capsules, or other forms.
We've seen a study indicating that ginger essential oil, by inhalation, is more effective than the standard prescription meds in dealing with post surgical nausea, and innumerable case studies indicating that Ginger Oil, by inhalation, is effective for the morning sickness that often accompanies early pregnancy. (Another useful anti-nausea essential oil is Red Mandarine, by the way, the the two together smell wonderful...like a cup of Mandarine Spice tea!)