One great way to prepare ginger for nausea is by using ginger root, now found commonly at mainstream grocery chains like Safeway. Peel with a food peeler (kind of awkward because ginger root is very misshapen), and slice into 1/4 inch size pieces. Put several of the pieces in a small pan with a cup or two of water and boil to extract flavor. For a less strong tea, you can add the raw ginger slices after to a cup of hot water and "steep" like you would a tea bag. I have found this style of ginger tea more effective than tea bag ginger.
That being said, on a personal note I find ginger candy to be effective when I am on the go and ginger beer, a type of soda made from ginger root, very effective. I think the combination of the carbonation and ginger really did the trick.
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