张老太因发热、咳嗽、咯痰等症状到医院看病,被诊断为呼吸道感染。医生给她开了青霉素(抗菌药物)静脉滴注,医院要求做皮试,张老太说,自己一周前刚因为其他原因使用过该药,皮试结果是阴性。为什么这次又要做皮试?用药前皮试是安全用药的准则之一,超过3天,就要求重复做皮试。临床常见需作皮试的药物有青霉素类、抗毒素及免疫 Zhang Laotai due to fever, cough, expectoration and other symptoms to the hospital, was diagnosed as respiratory tract infection. The doctor gave her a penicillin (antibiotics) intravenous infusion, the hospital asked to do a skin test, Zhang Granny said he just used the drug a week ago for other reasons, skin test results are negative. Why this time to do a skin test? Test medication before the skin is one of the guidelines for safe medication, more than 3 days, it requires repeated skin test. Clinical common skin test for penicillin drugs, anti-toxins and immune