RE: Vermox

Mebendazole and postpartum depression
Kurzel RB, Toot PJ, Lambert LV, & Mihelcic AS
New Zealand Medical Journal
107:439
October 1994

Plasma levels of mebendazole were below 20 ng/ml, and milk levels were
below this (undetectable), in agreement with other reports.  Therefore,
the oral dose to the baby is of the order of 1 ng/ml, and the baby
probably has a similarly low GI absorption.  Recommendations to withhold
breastfeeding are therefore questionable considering the exposure level.