咳嗽是身体的一种保护性反应,如吃饭时不小心,米粒呛入喉管,可通过剧烈的咳嗽将其排出;气管炎、肺炎时,通过咳嗽、咯痰,把肺内的细菌及组织破坏产物排出体外。咳嗽药有助于这一过程。 Cough is a protective reaction of the body, such as eating carelessly, rice choke into the throat, can be drained by a violent cough; bronchitis, pneumonia, cough, expectoration, the lungs of bacteria and tissues Disrupted products excreted. Cough medicine helps with this process.