This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Pregnancy induced Hypeension, Subject name: Gynaecology & Obstetrics
The drug of choice for prevention of seizures in a patient with severe pre-eclampsia is: 
Select and explain. 
A. Phenytoin, B. Magnesium sulphate, C. Diazepam, D. Nifedipine
B: Magnesium sulphate
Answer: B: Magnesium sulphate 
Explanation: DOC for both prevention and treatment of seizure in a patient with severe pre-eclampsia is MAGNESIUM SULPHATE Signs of IMMINENT ECLAMPSIA are Headache Nausea, vomiting Blurring of vision Increased knee jerks Reduced output Epigastric pain Severe proteinuria Diastolic Blood pressure ? 100mm/hg. DOC for hypeensive emergencies in pregnancy is I.V. LABETALOL.