A woman — 32 weeks, BP 170/110, proteinuria; severe preeclampsia; MgSO4, deliver. Preeclampsia (HTN ≥140/90 + proteinuria >20 weeks: mild — monitor, antihypertensives — labetalol/nifedipine; severe — ≥160/110, platelets <100k, liver, pulmonary edema — MgSO4 — seizure prophylaxis + deliver — cure is delivery): eclampsia (seizures — MgSO4 4g IV + deliver; control — airway, no restrain). HELLP (hemolysis, elevated liver, low platelets — deliver). Gestational HTN (no proteinuria — monitor — may progress). Prevention (aspirin 75–150mg — high-risk from 12w; calcium — low intake). The seizure is eclampsia — MgSO4 is the drug.