 [ Symptoms ] what medicine can i give my 2 year old for vomiting and diarrhea [ Disease ] the biggest concern in a young child with vomiting and diarrhea is the risk for dehydration i would recommend a fluid electrolyte replacement product like pedialyte for your child pedialyte will help replace vital nutrients that can be lost while sick start with a teaspoonful every 5 10 minutes and you can keep increasing as the child is able to tolerate it