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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.
Stay hydrated-as dehydration may increase the risk of leg cramps, drinking plenty of fluids may help prevent them. Exercise-if you embark on an exercise program, make sure it is suitable for you and that your progress is gradual.