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一些咳嗽的病人会这样认为,临睡前服止咳药,可防止夜间咳嗽,不影响睡眠。其实,这种做法并不好。止咳药之所以能够止咳,是因为它能作用于咳嗽中枢、呼吸道感受器和感觉神经末梢,抑制咳嗽反射。虽然止咳药止住了咳嗽,但它造成了呼吸道中痰液的潴留,容易阻塞呼吸道。入睡后副交感神经的兴奋性增高,导致支气管平滑肌的收缩,使支气管腔变形缩小,在越发狭窄的管腔里,加上痰液的阻塞,会导致肺通气的严重不足,造成人体缺氧,出现心胸憋闷、呼吸困难等。结果不仅不能通过服用止咳药来安然睡眠,反而会因此加重身体的不适。
Some cough patients think so, cough medicine before going to sleep, to prevent nighttime cough, does not affect sleep. In fact, this approach is not good. Cough suppository cough because it can act on the cough center, respiratory sensory receptors and sensory nerve endings, inhibit cough reflex. Although the cough stopped cough, but it caused respiratory tract retention of sputum, easy to block the respiratory tract. Parasympathetic nerves after falling asleep increased excitability, leading to bronchial smooth muscle contraction, the bronchial cavity deformation narrowing, in the more narrow lumen, coupled with sputum obstruction, will lead to serious lack of lung ventilation, resulting in human hypoxia, there Chest feel oppressed, breathing difficulties. As a result, not only is it not possible to sleep peacefully by taking a cough remedy, it may aggravate the body discomfort.