No information is available on the use of daridorexant during breastfeeding. Because it is about 99.7% bound to plasma proteins, amounts in milk are likely to be small. If daridorexant is required by the mother, it is not a reason to discontinue breastfeeding. However, until more data become available, an alternate drug may be preferred, especially while nursing a newborn or preterm infant. Monitor the infant for sedation, poor feeding and poor weight gain.