睡前不要服止咳药

• 作 者: 邓伯勋
• 出 处: 源流
• 发表日期: 2004年11期
• 关键词: 止咳药 咳嗽中枢 感觉神经末梢 咳嗽反射 肺通气 支气管平滑肌 支气管腔 咳嗽病 呼吸困难 专科医生

有些咳嗽病患者,喜欢在睡前服用止咳药,以为这样可以防止夜间咳嗽而不影响睡眠,其实这种做法是不对的。止咳药主要作用于咳嗽中枢、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滞留,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,易造成人体缺氧,出现心胸憋闷、呼吸困难等现象,加重不适。

Some cough patients, like to take cough medicine before going to bed, thinking it can prevent nighttime cough without affecting sleep, in fact, this approach is wrong. Cough main role in the cough center, respiratory sensory receptors and sensory nerve endings, inhibit cough reflex. Although the cough stopped the cough, it caused stasis in the respiratory tract and blocked the respiratory tract. After falling asleep, the excitement of the parasympathetic increased, leading to bronchial smooth muscle contraction, narrowing the bronchial lumen. In the more narrow lumen, coupled with the obstruction of sputum, can lead to serious lack of lung ventilation, easy to cause the human body hypoxia, chest tightness, breathing difficulties and other phenomena, aggravating discomfort.