药物引起的不良反应可分为:过量反应,副作用,药物的相互作用,致畸性及变态反应。变态反应与药物的药理作用无关,为机体对某种抗原物质产生的异常免疫反应,引起组织损伤或功能障碍。患者具有人类的白细胞抗原(HLA)某些定型,或系特异性体质,或有变应性疾病史(如湿疹、哮喘、枯草热等),更易发生药源性变态反应。 Adverse reactions caused by drugs can be divided into: excessive reaction, side effects, drug interactions, teratogenicity and allergy. Allergies and drug pharmacological effects have nothing to do, for the body of an antigen-specific immune response, causing tissue damage or dysfunction. Patients with human leukocyte antigen (HLA) certain stereotypes, or Department of specific constitution, or have a history of allergic diseases (such as eczema, asthma, hay fever, etc.), more susceptible to drug-induced allergic reactions.