Nalbuphine is excreted into breastmilk in amounts much smaller than the dose given to infants for analgesia. Because nalbuphine has poor oral absorption, it is unlikely to adversely affect the breastfed infant. If nalbuphine is required by the mother of a newborn, it is not a reason to discontinue breastfeeding; however, once the mother's milk comes in, it is best to provide pain control with a nonnarcotic analgesic and limit maternal intake to 2 to 3 days with close infant monitoring. If the baby shows signs of increased sleepiness (more than usual), difficulty breastfeeding, breathing difficulties, or limpness, a physician should be contacted immediately.