冬天易患呼吸系统疾病。痰是呼吸道炎症的产物,如果痰液不能顺利咯出,大量积集在气管与支气管内,极易造成气管堵塞,呼吸困难。祛痰药可稀释痰液或液化黏痰,使之易于咯出,按其作用方式分为3类:1.刺激性祛痰药。如氯化铵片通过刺激胃黏膜,反射性增加呼吸道分泌而祛痰。口服该药后可使呼吸道内液体分泌加 Winter prone to respiratory diseases. Sputum is a product of respiratory inflammation, if the sputum can not be smoothly spit out, a large number of accumulation in the trachea and bronchi, easily lead to tracheal blockage, difficulty breathing. Expectorants can be diluted sputum or phlegm liquefaction, making it easy to spit out, according to their mode of action is divided into three categories: 1. Irritating expectorant. Such as ammonium chloride tablets by stimulating the stomach, reflex to increase respiratory secretion and expectorant. After oral administration of the drug can make the respiratory fluid secretion plus