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  • Title: Quetiapine and breast feeding.
    Author: Rampono J, Kristensen JH, Ilett KF, Hackett LP, Kohan R.
    Journal: Ann Pharmacother; 2007 Apr; 41(4):711-4. PubMed ID: 17374621.
    Abstract:
    OBJECTIVE: To quantify the relative infant dose of quetiapine during breast feeding, describe the milk:plasma (M:P) ratio, and determine the well-being of the exposed infant. CASE SUMMARY: A 26-year-old mother and her 3-month-old son were studied over a 24 hour quetiapine dose interval at steady-state. Quetiapine concentrations were quantified by high-performance liquid chromatography. Infant exposure was calculated as the concentration in milk multiplied by an estimated milk production of 0.15 L/kg/day and normalized to the weight-adjusted maternal dose. The average concentration in milk was 41 microg/L, the M:P ratio (measured using average concentrations in the elimination phase) was 0.29, and the relative infant dose was 0.09% of the maternal weight-adjusted dose (7273 microg/kg/day). The infant plasma concentration of 1.4 microg/L was some 6% of the corresponding maternal plasma concentration. No adverse effects were noted in the infant. DISCUSSION: Our findings of an infant exposure to quetiapine of less than 0.1% of the maternal dose and a lack of adverse effects confirm and extend the findings of 2 previous studies. CONCLUSIONS: Although limited, the data shown here support the prescription of quetiapine to a breast-feeding mother following a careful individual risk/benefit analysis. We suggest regular monitoring of infant progress and occasional measurement of quetiapine in the infant's plasma.
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