hello dear
thanks for your query at HCM
amoxicillin side effects are following
hypersensitivity, diarrhea, agitation, anxiety, dizziness, headache, nausea, , behavioral changes
serious adverse effects are steven
johnson syndrome,
exfoliative dermatitis, hepatitis, anaphylaxsis, blood disorders, seizures, and colitis .
amoxicillin causes adverse effects if dose taken is above 250 milligram per kilogram body weight.
your child did not appear to be have taken that much amount of dose.
there is no need to gastric emptying if dose is less than that.
watch for signs mentioned above report to doctor if any problem
regards