百日咳属临床常见病，以阵发性痉挛性咳嗽，咳后有特殊的吸气性吼声，最后吐出痰沫而止为特征。笔者自拟麻蝉止嗽散治疗本病26例，取得满意疗效。一般资料：26例中，均经西药抗炎止咳治疗后无效者。血常规检查白细胞在15X10’凡以上，淋巴细胞在50％以上。年龄4～9岁之间，其中 Pertussis is a common clinical disease, paroxysmal spasmodic cough, cough after a special inspiratory roar, and finally spit out the phlegm only features. I self-cicada Cough Powder treatment of the disease in 26 cases, achieved satisfactory results. General information: 26 cases, were anti-inflammatory cough after Western medicine invalid. Blood tests white blood cells in more than 15X10 ’, more than 50% of lymphocytes. Age 4 to 9 years old, among them