We all seem to get upset stomach some worse than others. My cramps were terrible.
If you can handle ginger root this works like magic.. (even if you can't give it a go you'll be impressed with the results).. at least it does for me and several others that I have spoken with going thru withdrawal symptoms. It really is an ancient remedy.

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Fresh ginger root preferably organic is what you use. Peel it and grate it. More is better. Put it in a tea ball, add hot water and let steep. Very simple and not expensive.
Good luck.