Detection of infliximab in breast milk of nursing mothers with inflammatory bowel disease

► Current available data indicate that infliximab is not transferred in breast milk. ► The present study shows that infliximab can be detected in the breast milk of nursing mothers. ► The level of infliximab in breast milk is low, at 1/200th of its level in maternal serum. ► The clinical and immunological impact of the newborn's exposure to this miniscule amount of infliximab has yet to be determined. ► Infliximab-treated patients should weigh these findings versus the health benefits of breast-feeding when deciding whether to nurse their babies.