Hi doc, i had been anticipating taking my next 500 amoxicillin and with the whole family visiting and Christmas hullaballoo, on TOP of my upper respiratory infection, i wasn t sure if I d already taken it at 8:00 on the dot when I went to take it at @8:30 thinking I may have forgotten. Well, shortly after swallowing, I counted the remainder and they seemed to be one short, so I likely doubled-up. Probably not advisable without my doctor s advice, but is there some unfortunate toxicity at that level?