头孢氨苄(先锋霉素Ⅳ)是一种广谱抗生素,其作用机理类似青霉素。两药具有共同的β-内酰胺环,其降解产物在体内能直接与蛋白结合而成致敏原,故两者可能存在交叉过敏性。但其化学结构不完全相同,两者的抗原性质也就 Cefalexin (Pioneermycin Ⅳ) is a broad-spectrum antibiotics, its mechanism of action similar to penicillin. The two drugs have a common β-lactam ring, the degradation products in the body can be directly combined with the protein allergens, so the two may be cross-allergic. However, its chemical structure is not exactly the same, both of the antigenic properties also