is breaking out in a rash a side effect of amoxicillin or an allergic reaction. my 8 month old broke out in a rash after 3 days of using amoxicillin for an ear infection. doctor said it was a side effect i just want to make sure cause my sister has a high allergy to amoxicillin.
an allergic reaction is often sudden hives that are very pruritic (itchy). an amoxicillin side effect usually occurs near the end of the course of treatment (day 8-10 not day three) and is bright red occuring all over the body. this does not usually itch. so. it could be either one. i don't have enough specific information and the ability to examine your baby to offer you a definitive answer.