No information is available on the clinical use of itraconazole during breastfeeding. However, limited data indicate that maternal itraconazole produces levels in milk that are less than the 5 mg/kg daily doses that have been recommended to treat infants. Until more data become available, an alternate drug may be preferred, especially while nursing a newborn or preterm infant. If itraconazole is used during breastfeeding, monitoring of the infant’s liver enzymes should be considered, especially with long courses of therapy.