Injectable magnesium sulfate has more functions, often used as anticonvulsant, commonly used in gestational hypertension to reduce blood pressure, but also for the treatment of pre-eclampsia and eclampsia, and also for the treatment of preterm labor. 1. Anticonvulsant: magnesium sulfate can inhibit the central nervous system, relax skeletal muscle, sedative, anti-spasmodic and reduce intracranial pressure and other effects, commonly used in the treatment of convulsions, eclampsia, intracranial hypertension and other diseases. 2. Antihypertensive: magnesium sulfate has a diastolic effect on vascular smooth muscle, resulting in a decrease in blood pressure, commonly used in rescue hypertensive crisis. 3. Treatment of preterm labor: Injectable magnesium sulfate also has an inhibitory effect on uterine smooth muscle contraction, and can also be used to treat preterm labor. When suffering from myocardial damage and heart block patients, breastfeeding patients can not use the drug, some patients in the use of the drug may appear sweating, flushing, nausea, panic and other adverse reactions, need to slow down the speed of the injection, generally able to alleviate the discomfort of the symptoms. Magnesium sulfate for injection is a prescription drug, it is recommended to follow medical advice.