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Quetiapine Excretion Into Human Breast Milk.
Journal of Clinical Psychopharmacology 2018 August
BACKGROUND: Risk assessment of the use of quetiapine during breastfeeding is challenging owing to a paucity of data.
METHODS: A pharmacokinetic study was conducted in lactating women who were taking quetiapine. The primary endpoint was to determine quetiapine concentration profiles in milk and estimated infant exposure levels. Multiple milk and a single blood quetiapine concentrations were determined using a highly sensitive liquid chromatography with tandem mass spectroscopy method.
RESULTS: Nine subjects receiving fast-release quetiapine (mean dose, 41 mg/d) were analyzed at steady state. The mean milk/plasma drug concentration ratio at 2-hour postdose was 0.47 (SD, 0.50; range, 0.13-1.67). The mean milk concentration of each patient was 5.7 ng/mL (SD, 4.5; range, 1.4-13.9 ng/mL). The mean infant quetiapine dose via milk per body weight relative to weight-adjusted maternal dose was 0.16 % (SD, 0.08; range, 0.04%-0.35%).
CONCLUSIONS: Infant exposure levels to quetiapine via milk are predicted to be very small.
METHODS: A pharmacokinetic study was conducted in lactating women who were taking quetiapine. The primary endpoint was to determine quetiapine concentration profiles in milk and estimated infant exposure levels. Multiple milk and a single blood quetiapine concentrations were determined using a highly sensitive liquid chromatography with tandem mass spectroscopy method.
RESULTS: Nine subjects receiving fast-release quetiapine (mean dose, 41 mg/d) were analyzed at steady state. The mean milk/plasma drug concentration ratio at 2-hour postdose was 0.47 (SD, 0.50; range, 0.13-1.67). The mean milk concentration of each patient was 5.7 ng/mL (SD, 4.5; range, 1.4-13.9 ng/mL). The mean infant quetiapine dose via milk per body weight relative to weight-adjusted maternal dose was 0.16 % (SD, 0.08; range, 0.04%-0.35%).
CONCLUSIONS: Infant exposure levels to quetiapine via milk are predicted to be very small.
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