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Pharmacokinetics of metoprolol during pregnancy and lactation.


ABSTRACT: The objective of this study was to evaluate the steady-state pharmacokinetics of metoprolol during pregnancy and lactation. Serial plasma, urine, and breast milk concentrations of metoprolol and its metabolite, ?-hydroxymetoprolol, were measured over 1 dosing interval in women treated with metoprolol (25-750?mg/day) during early pregnancy (n?=?4), mid-pregnancy (n?=?14), and late pregnancy (n?=?15), as well as postpartum (n?=?9) with (n?=?4) and without (n?=?5) lactation. Subjects were genotyped for CYP2D6 loss-of-function allelic variants. Using paired analysis, mean metoprolol apparent oral clearance was significantly higher in mid-pregnancy (361?±?223 L/h, n?=?5, P?

SUBMITTER: Ryu RJ 

PROVIDER: S-EPMC5564514 | biostudies-literature | 2016 May

REPOSITORIES: biostudies-literature

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The objective of this study was to evaluate the steady-state pharmacokinetics of metoprolol during pregnancy and lactation. Serial plasma, urine, and breast milk concentrations of metoprolol and its metabolite, α-hydroxymetoprolol, were measured over 1 dosing interval in women treated with metoprolol (25-750 mg/day) during early pregnancy (n = 4), mid-pregnancy (n = 14), and late pregnancy (n = 15), as well as postpartum (n = 9) with (n = 4) and without (n = 5) lactation. Subjects were genotyped  ...[more]

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