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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.
Since apple cider vinegar is high in potassium, it is an effective home remedy for leg cramps. Boil water and add one teaspoon of red raspberry tea to it. Let this infusion sit for a while before drinking it every morning and evening. Raspberry tea is an effective remedy for leg cramps at night.