Bromhexine is a common phlegmolytic drug for respiratory diseases and is commonly prescribed mainly in the form of static doses. Among them, bromhexine is used in combination with anti-inflammatory and antiviral drugs to treat acute attacks of chronic bronchitis, emphysema and also pneumonia and other common coughs, coughs and wheezes, which can be very effective. Bromhexine is mainly in the case of breathing difficulties, phlegm thick cough can not be swallowed, which cough yellow phlegm and with other phlegm drugs have little effect, need to take, it is best to use the quiet dose to treat, the effect of phlegm expectoration is more ideal.