thanks for your query at HCM
you can give your child all three medicine according to necessity, there is no problem if you give three medication at a time.amoxicillin
is antibiotic that will control infection, benadryl
for cold and cough, tylenol
in anti inflammatory agent that will control pain.
no need to worry .
give amoxicillin if there is severe infection or high grade fever
otherwise no need for amoxicillin.