A 30-year-old pregnant woman at 35 weeks gestation presents with a blood pressure of 165/110 mmHg, 3+ proteinuria, severe headache, and epigastric pain. Deep tendon reflexes are hyperreflexic. She has no prior history of hypertension. What is the most appropriate immediate pharmacologic intervention to prevent eclamptic seizures?
✓ Correct Answer: Option C
Magnesium sulfate is the agent of choice for seizure prophylaxis in patients with preeclampsia with severe features or eclampsia. While antihypertensives (like labetalol, hydralazine, nifedipine) manage blood pressure, magnesium specifically prevents seizures.