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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.
Causes. Leg and foot cramps can be triggered by conditions affecting your hydration, blood flow, hormone levels, and your body's ability to absorb and process certain minerals. Kidney failure, alcohol abuse, cirrhosis, pregnancy, diarrhea, muscle damage and oral contraceptives can cause leg and foot cramps.