A primigravida at 33 weeks with pre-eclampsia with severe features has blood pressure of 172/114 mmHg despite three incremental IV boluses of labetalol. She has received a total cumulative dose of 300 mg intravenously. Blood pressure remains above 160/110 mmHg. What is the next best step?

• A Repeat another 40 mg IV bolus of labetalol
• B Proceed immediately to caesarean delivery regardless of maternal status
• C Give oral methyldopa 750 mg stat
• D Switch to IV hydralazine or start an infusion such as nicardipine ✓

Explanation

The recommended maximum cumulative dose of intravenous labetalol is 300 mg. If blood pressure remains uncontrolled at this ceiling, further labetalol risks bradycardia and refractory hypotension, so another agent such as IV hydralazine or a nicardipine infusion should be used. Oral methyldopa is too slow for acute severe hypertension. Immediate caesarean delivery is not indicated solely for resistant blood pressure once seizure prophylaxis and alternative antihypertensives are instituted; stabilisation precedes delivery decisions.

Reference: Williams Obstetrics, 26th ed.

High-yield for: NEET PGINI-CETNExTFMGEUSMLEPLABMRCP

Written and medically reviewed by the StethoPrep medical team.