When a 3-year-old baby vomits after taking medicine, it is recommended to fast on water for half an hour to one hour and observe the state of the child. If the baby is in good condition and the vomiting occurs within half an hour after the feeding, it can be fed once more. Three-year-old babies vomit after taking medication, the common cause is aversion to psychology, followed by vomiting, try to choose the children’s version of the drug before using the drug. Part of the macrolide drugs, such as erythromycin, azithromycin, will also have to cause vomiting, try to take after meals. If the baby in addition to vomiting, accompanied by abdominal pain, diarrhea, or even fever, more suggestive of gastrointestinal diseases, it is recommended that timely hospital treatment. If the vomiting occurs half an hour after taking the medicine, part of the drug has been absorbed, at this time only need to pay attention to vomiting do not cause choking, observe the baby’s state can be. In short, if the three-year-old baby after taking medication frequent vomiting, it is recommended to timely pediatric consultation, clear cause, to take targeted treatment.