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- W2566873639 abstract "Aims Diabetes mellitus can inhibit cytochrome P450 3A4, an enzyme responsible for the metabolism of nifedipine, used for the treatment of hypertension in pregnant women. We aimed to assess the effect of type 2 diabetes mellitus (T2DM) on the pharmacokinetics, placental transfer and distribution of nifedipine in amniotic fluid in hypertensive pregnant women. Methods The study was conducted in 12 hypertensive pregnant women [control group (CG)] and 10 hypertensive pregnant women with T2DM taking slow-release nifedipine (20 mg, 12/12 h). On the 34th week of gestation, serial blood samples were collected (0–12 h) after administration of the medication. At delivery, samples of maternal and fetal blood and amniotic fluid were collected for determination of nifedipine distribution in these compartments. Results The median pharmacokinetic parameters of CG were: peak plasma concentration (Cmax) 26.41 ng ml−1, time to reach Cmax (tmax) 1.79 h, area under the plasma concentration vs. time curve from 0–12 h (AUC0–12) 235.99 ng.h ml−1, half-life (t½) 4.34 h, volume of distribution divided by bioavailability (Vd/F) 560.96 l, and ClT/F 84.77 l h−1. The parameters for T2DM group were: Cmax 23.52 ng ml−1, tmax 1.48 h, AUC0–12 202.23 ng.h ml−1, t½ 5.00 h, Vd/F 609.40 l, and apparent total clearance (ClT/F) 98.94 l h−1. The ratios of plasma concentrations of nifedipine in the umbilical vein, intervillous space and amniotic fluid to those in the maternal vein for CG and T2DM were 0.53 and 0.44, 0.78 and 0.87, respectively, with an amniotic fluid/maternal plasma ratio of 0.05 for both groups. The ratios of plasma concentrations in the umbilical artery to those in the umbilical vein were 0.82 for CG and 0.88 for T2DM. Conclusions There was no influence of T2DM on the pharmacokinetics or placental transfer of nifedipine in hypertensive women with controlled diabetes." @default.
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- W2566873639 date "2017-01-29" @default.
- W2566873639 modified "2023-10-18" @default.
- W2566873639 title "Effect of type 2 diabetes mellitus on the pharmacokinetics and transplacental transfer of nifedipine in hypertensive pregnant women" @default.
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- W2566873639 doi "https://doi.org/10.1111/bcp.13226" @default.
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