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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.
Also, some medications can cause side effects of muscle spasms. Stay Hydrated. It is not well known exactly how dehydration and muscle cramping are related, but it is known that dehydration can predispose to leg cramps. Drink at least three full glasses of water each day, including one before bedtime.