氨茶硷具有直接解除支气管平滑肌痉挛的作用,从而达到止喘的目的。口服时产生的作用较慢,但维持作用的时间较长,效果也较稳定,中枢兴奋及心血管的副作用又较拟肾上腺素药物(如麻黄素等)为轻。因此,是目前临床上比较常用的止喘药物之一。但是,在使用氨茶硷治疗小儿喘息时必须谨慎小心。由于小儿的排泄功能和解毒功能尚不够完善,而且氨茶硷的治疗量和中毒量又比较接近,假如在用量 Aminophylline directly relieve bronchial smooth muscle spasm, so as to achieve the purpose of stopping asthma. The role of oral slow, but to maintain a longer duration, the effect is more stable, central and cardiovascular side effects than adrenergic drugs (such as ephedrine, etc.) as light. Therefore, it is one of the most commonly used antiasthmatic drugs in clinic at present. However, care must be taken when using aminophylline to treat wheezing in children. As children’s excretory function and detoxification function is not yet perfect, and the treatment of ammonia theophylline and the amount of poisoning is relatively close, if the amount