病例简介；患者男，12岁，学生。继往有哮喘史。本次因咳嗽10多天，伴气促就诊。体检：一般情况尚可，咽红，双肺闻及少许干性罗音。诊断；支气管哮喘。因既往有青霉素过敏史，即给予硫酸卡那霉素50万U肌肉注射，每天2次，第一针注射后约20min，皮肤突然出现皮疹，散在团块状红 Case description; male patient, 12 years old, student. Past history of asthma. The cough for more than 10 days, with shortness of breath treatment. Physical examination: the general situation is acceptable, throat, lungs smell a little dry rales. Diagnosis; Bronchial asthma. Because of past history of penicillin allergy, that is given 500000 U kanamycin sulfate intramuscular injection, 2 times a day, the first injection after about 20min injection, the skin suddenly appeared rash, loose lumps of red