Preeclampsia is a condition that affects pregnant women. Characterized by high blood pressure and signs of damage to different organ systems like liver and kidneys. Pre-eclampsia/eclampsia is a life threatening multisystem disorder affecting 2-8% of all pregnancies worldwide. The exact cause of preeclampsia involves several factors. Magnesium sulphate has been the first choice drug in the USA since 1930 for controlling the first eclamptic fit and for preventing further fits. Magnesium sulfate is recommended for the prevention of eclampsia in women with severe pre-eclampsia in preference to other anticonvulsant.