青霉素是 β -内酰胺类抗生素。通过与细菌细胞膜上的青霉素结合蛋白 (ＰＢＰ)结合而妨碍细菌细胞壁粘肽的合成 ,使之不能交联而造成细胞壁的缺损 ,致使细菌细胞破裂而死亡。为繁殖期杀菌药。临床主要用于治疗扁桃体炎、中耳炎、乳腺炎等急性感染。常见的不良反应有过敏反应 , Penicillin is a beta-lactam antibiotic. By binding to the penicillin-binding protein (PBP) on the bacterial cell membrane, it prevents the synthesis of the bacterial cell wall mucopolysaccharide and renders it unable to cross-link to cause cell wall defects, resulting in the rupture of bacterial cells. Sterile drugs for the breeding season. Clinical mainly for the treatment of tonsillitis, otitis media, mastitis and other acute infections. Common adverse reactions are allergic reactions,