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Published online: 2024-02-01

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Effects of intravenous nicardipine followed by oral labetalol in combination with nifedipine controlled-release tablet on severe peripartum hypertension

Lan Lan1, Yunsheng Yan1, Haifeng Qi1, Jiali Qin1, Lan Li1, Shengwen Gan1, Ruoxuan Zhang2, Yaozong Zhang13

Abstract

Objectives: To investigate the effects of intravenous nicardipine as initial therapy and oral labetalol combined with nifedipine controlled-release tablet as subsequent treatment of severe peripartum hypertension.

Material and methods: Intravenous nicardipine was delivered as the initial treatment, after the target blood pressure (BP) had been achieved, oral labetalol was used to maintain the target BP. If oral labetalol failed to maintain the target BP, oral labetalol combined with nifedipine controlled-release tablet was used.

Results: A total number of 131 patients were enrolled. The target BP (BP < 140/90 mmHg) was achieved in all patients within 60 minutes by intravenous nicardipine. After receiving labetalol orally, the target BP was maintained in nine patients. However, in 104 patients, we had to combine oral labetalol and nifedipine controlled-release tablet due to re-elevation of their systolic BP to 140–159 mmHg. In 18 patients, we restarted intravenous nicardipine because their systolic BP re-elevated above 160 mm Hg. Among the 104 patients who received oral labetalol and nifedipine controlled-release tablet, the target BP was achieved and maintained in 96 patients, and eight patients had to restart nicardipine. Of the total number of 26 patients in whom intravenous nicardipine was resumed, the target BP was successfully maintained in 22 patients with oral labetalol combined with nifedipine controlled-release tablet.

Conclusions: Intravenous nicardipine rapidly and safely lowered severe peripartum hypertension. As subsequent therapy, oral labetalol combined with nifedipine controlled-release tablet protocol may be applied to effectively maintain a target BP.

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