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I have MG for more than 25 years . I have severe muscle spasms of my hands and fingers and muscle cramps . I have been taking small doses of magnesium for years without much improvement in the spasms . Since last year I have been taking mega doses of magnesium and the muscle spasms have stopped . I have not noticed any deterioration in my MG symptoms . The list of medications and things mentioned to avoid when you have MG is endless .