Magnesium sulfate poisoning after the patient will appear the following performance: 1, the whole body muscle weakness, tendon reflexes disappeared, etc., will lead to respiratory muscle paralysis and respiratory failure life-threatening. 2, magnesium sulfate poisoning will appear after the blood pressure drop, arrhythmia, serious will lead to heart stop beating. 3, magnesium sulfate poisoning will appear after the skin flushing, sweating, dry mouth, nystagmus and other uncomfortable symptoms. 4, Magnesium sulfate poisoning early will appear nausea, vomiting, abdominal pain, diarrhea, etc., magnesium sulfate poisoning will lead to multiple organ function damage, causing multiple organ failure and life-threatening. Magnesium sulfate poisoning should promptly take rescue measures, general magnesium sulfate poisoning are pregnant women with gestational hypertension after treatment with magnesium sulfate, in the case of overdose will lead to magnesium sulfate poisoning.