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According to the Mayo Clinic these are some known causes of leg cramps. As you can see alcoholism and dehydration are listed. I doubt that a couple of glasses of wine will cause them, but drinking water right before going to bed may help.
Customer: replied 4 years ago. Not alcohol dependent, have a couple glasses of white wine with dinner. Just have diarrhea in the morning within a half hour of arising. Stops after a few times eliminating but stomach cramps off and on the rest of day. Expert: khagihara replied 4 years ago.