Hi, Donna,

I do take ginger with migraines, but not for the headache itself. I find it very useful for nausea. Fresh is supposed to be the best form, for nausea, but I mostly use it in other forms that I have available, and they all help me:

Fresh, raw ginger (if available)
A small slice is sufficient. She doesn't even need to eat it (it can be quite fibrous). She can just suck on it like a candy. Occasionally, tap it between the teeth to get more juices out.

Dried, powdered ginger
This is what I mostly use because I always have it. I put a pinch of it under my tongue and let the flavor seep out until it takes over my mouth, then I swallow. I repeat that two or three times at first, and then as needed.

Candied ginger
A couple of pieces of this often helps. It seems not quite as strong as the other two forms (but it is yummier ).

Oh, you might also consider posting your question in the headache forum. Here is the link: http://neurotalk.psychcentral.com/forum32.html

Hope that helps.