Is use of multiple antihypertensive agents to achieve blood pressure control associated with adverse pregnancy outcomes?

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Abstract

OBJECTIVE:

We assessed whether requiring >1 medication for blood pressure control is associated with adverse pregnancy outcomes.

STUDY DESIGN:

Retrospective cohort of 974 singletons with chronic hypertension at a tertiary care center. Subjects on >1 antihypertensive agent were compared with those on one agent <20 weeks gestational age with results stratified by average blood pressure (<140/90 and ≥ 140/90 mm Hg) from prenatal visits. The primary maternal outcome was preeclampsia; the primary neonatal outcome was small for gestational age (<10th percentile). RESULT: Among women with blood pressure ≥140/90 mm Hg, women on multiple agents had the greatest risk of preeclampsia, severe preeclampsia, antenatal admissions to rule out preeclampsia, preterm birth <35 weeks and composite neonatal adverse outcomes.

CONCLUSION:

Compared with use of a single agent when blood pressure is ≥140/90 mm Hg, use of multiple agents increases adverse risks, while no such finding exists when blood pressure is controlled below 140/90 mm Hg.

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