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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)

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Johannessen, S.I. et al.

Johannessen, Helde, Brodtkorb,

Levetiracetam concentrations in serum and in breast milk at birth and during lactation.

PURPOSE: To study the pharmacokinetics of levetiracetam (LEV) at birth, during lactation, and in the nursed infant. METHODS: Eight consecutive breast-feeding women with epilepsy treated with LEV twice daily and their infants were studied. RESULTS: The mean umbilical cord serum/maternal serum ratio was 1.14 (range, 0.97-1.45) (n = 4). The mean milk/maternal serum concentration ratio was 1.00 (range, 0.76-1.33) at 3 to 5 days after delivery (n = 7). At sampling 2 weeks to 10 months after delivery (n = 5), it was similar (range, 0.85-1.38). At 3 to 5 days after delivery, the infants had very low LEV serum concentrations (<10-15 microM), a finding that persisted during continued breast-feeding. No malformations were detected, and in none of the infants did signs of adverse effects develop. CONCLUSIONS: Our data indicate an extensive transfer of LEV from mother to fetus and into breast milk. However, breast-fed infants had very low LEV serum concentrations, suggesting a rapid elimination of LEV.[1]

References

Levetiracetam concentrations in serum and in breast milk at birth and during lactation. Johannessen, S.I., Helde, G., Brodtkorb, E. Epilepsia (2005) [Pubmed]

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