Amoxicillin is a class of penicillin antibiotics, its role is especially for gram-positive bacteria have a relatively good bactericidal effect and therapeutic effect, especially some alcoholism, drinking patients, have urinary tract infections or have done surgery patients, can not use cephalosporin, it is advocated to use amoxicillin. Amoxicillin belongs to class B of the pregnancy drug classification and pregnant women can take amoxicillin. However, the use of amoxicillin as a type of drug is contraindicated in such patients with penicillin allergy and cephalosporin allergy.