A 30-year-old woman at 33 weeks with pre-eclampsia with severe features is receiving IV labetalol for blood pressure control. After two doses, her blood pressure remains 164/108 mmHg. Which of the following is the most appropriate next antihypertensive agent according to standard obstetric protocols?
- A Oral nifedipine ✓
- B IV nitroprusside
- C IV esmolol
- D Sublingual captopril
Correct answer: A. Oral nifedipine
Explanation
ACOG and standard obstetric protocols recommend IV labetalol, oral nifedipine, or IV hydralazine as first-line agents for acute severe hypertension in pregnancy. When one agent fails, another from the same class is used. Oral nifedipine (immediate release) is the appropriate second-line agent. IV nitroprusside is reserved for refractory cases due to fetal cyanide toxicity risk. Esmolol is used cautiously. ACE inhibitors like captopril are absolutely contraindicated in pregnancy due to fetal renal agenesis.
Reference: Williams Obstetrics, 26th ed.
High-yield for: NEET PGINI-CETNExTFMGEUSMLEPLABMRCP
Written and medically reviewed by the StethoPrep medical team.