I was prescribed 500 mg of amoxicillin four times a day for 7 days. I'm currently on my third dose and have not had a reaction yet. When I was younger I remember being told I had an allergic reaction to amoxicillin and cephalosporins. However as an adult I think I may have taken amoxicillin and been fine? I don't really remember. So my question is if I'm fine at my third dose does this mean I'm ok or that at least I won't go into anaphylactic shock?