To determine the therapeutic dose of Mg according to BMI, serum level of calcium, creatinin and albumin a cross sectional study were carried on 150 cases of preeclampsia (100 mild, 50 sever type) in Valei-Asr Hospital through the years 1378-79. All of eligible patients had given a single dose of 4 gr Mg, sulfate intravenously, then had continued with 20 gr/lit, 28 drop/min through IV infusion. ...