Amoxicillin 500mg is an antibiotic that one can commonly take and which successfully works to eradicate bacterial skin, urinary, and respiratory tract infections. A penicillin derivative, it results in killing the bacteria, as their cell wall formation is completely halted. Amoxicillin 500mg is used orally with less side effects, including diarrhea or nausea. All medications are to be taken on a doctor's prescription at all times.