克喘素(NAB—365),化学名称是1—(4—氨基—3,5二氯苯基)—2—叔丁胺基乙醇盐酸盐,分子式为C_(12)H_(18)ON_2Cl·HCl。作用与用途:克喘素对肾上腺素有β_2受体的兴奋作用,并伴有β_1受体的阻断作用,少有β_1受体的内在活力,可解除支气管的痉挛,并能增强呼吸道粘膜纤毛的活力,有利于祛痰。口服克喘素20微克,2—3小时在人体血浆中产生最高浓度0.11微克/毫升,大部分以原形从肾脏排出。本品临床适用于支气 The chemical name is 1- (4-amino-3,5-dichlorophenyl) -2-tert-butylaminoethanol hydrochloride with the molecular formula C 12 H 18 (18) ON 2 Cl · HCl . Role and purpose: Chestnut on the adrenaline β_2 receptor excitatory effect, and with the blocking effect of β_1 receptor, less intrinsic activity of β_1 receptors, bronchial spasm can be relieved, and can enhance respiratory mucosal cilia The vitality, is conducive to expectorant. Twenty micrograms of oral Ketosin, 2-3 hours in human plasma produced the highest concentration of 0.11 micrograms / ml, most of the prototype from the kidneys. This product is suitable for clinical use