No information is available on the clinical use of basiliximab during breastfeeding. Because basiliximab is a large protein molecule with a molecular weight of about 144,000 Da, the amount in milk is likely to be very low. It is also likely to be partially destroyed in the infant's gastrointestinal tract and absorption by the infant is probably minimal. Until more data become available, basiliximab should be used with caution during breastfeeding, especially while nursing a newborn or preterm infant. Waiting for at least 2 weeks postpartum to resume therapy may minimize transfer to the infant. The manufacturer recommends that breastfeeding be discontinued during basiliximab therapy.