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1 前言剧烈咳嗽可能引起严重并发症及增加病人痛苦,但咳嗽和排痰又是呼吸道防御机能不可分割的一部分,理想的镇咳药应兼能止咳、祛痰,而无明显呼吸抑制和催眠等副作用。平喘药是指具有以缓解或消除喘息症状的药物。这种喘息是由于支气管平滑肌痉挛性收
1 Introduction Severe cough may cause serious complications and increase patient pain, but cough and expectoration are also an integral part of the respiratory defense function. The ideal antitussive should both cough and expectorant without obvious respiratory depression and hypnosis side effect. Antiasthmatic drugs are those that have been used to relieve or eliminate the symptoms of wheezing. This wheezing is due to bronchial smooth muscle spasm