If the mother of the child is taking azithromycin, it is necessary to stop the azithromycin for four days before continuing to breastfeed the child. This is because azithromycin is a macrolide antibiotic with a long half-life and it takes about four days for azithromycin to be completely metabolized. If a child is breastfed too early, it can cause abdominal pain, diarrhea, vomiting, and other gastrointestinal symptoms. If a child’s mother has taken azithromycin while breastfeeding, it is more appropriate to pull out the breast milk with a breast pump during the period of taking the medication to prevent milk return, and then continue to breastfeed the child four days after the medication is stopped, and infant formula can be applied during the period of stopping breastfeeding.