This drug is a compound preparation, the so-called compound preparation is not only two ingredients, this drug has more than five kinds of ingredients, look into other ingredients, each different ingredients have different roles, the main forcodine is a central cough suppressant, the central cough suppressant effect than codeine dependence is smaller. After taking it, it is not easy to produce dependence, as follows: 1, the role of cough suppression; 2, containing other ingredients, there is an anti-allergic effect, so take this drug also pay attention to not driving, not precision work, easy drowsiness, easy to cause traffic accidents; 3, containing glycerol ether, etc., phlegm, dilute phlegm, promote phlegm discharge and other effects. Ingredient role actually has five kinds: central cough suppression, anti-allergic, cough and phlegm, phlegm becomes thin, facilitate the discharge of the body, and then the combination of the airway smooth. Therefore, when there are infections, colds, thick sputum, which cannot be easily expelled from the body, etc., you can consider choosing this medicine to play the role of phlegm, antispasmodic, asthma, cough suppressant and anti-allergic.