Stopped: Slow enrollment
The purpose of this study is to understand if administration of a personalized dose of the anti-hypertensive medication, labetalol, based on patient's history of preexisting hypertension, will be more effective at controlling severe hypertension during pregnancy, compared to the current standard dosing.
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Time to blood pressure control
Timeframe: This outcome will be measured during antepartum admission and will start with the first dose of IV labetalol given for severe blood pressure until subsequent blood pressure check is non-severe (<160 systolic and <110 diastolic), ending with delivery
Length of blood pressure control
Timeframe: This outcome will be measured during antepartum admission and will start with the first non-severe blood pressure after IV labetalol dosing until the next dose of IV labetalol is indicated (by severe blood pressure), ending with delivery