No information is available on the clinical use of dulaglutide during breastfeeding. Because dulaglutide is a large protein molecule with a molecular weight of 59,669 daltons, the amount in milk is likely to be very low and absorption is unlikely because it is probably destroyed in the infant's gastrointestinal tract. Until more data become available, dulaglutide should be used with caution during breastfeeding, especially while nursing a newborn or preterm infant.