Cough medicine is a cough medicine with a central sedative effect, and its effect is almost similar to codeine, so it is very effective in relieving cough directly when coughing. But because of the central sedative effect, it can also cause drowsiness, dizziness, lack of concentration, so after using this drug try not to drive, or do some high-altitude work, manipulate the tower crane, try not to do these jobs, because there may be a danger. The biggest problem is that there are more people driving nowadays, and it is dangerous to drive after using cough medicine. There are also some problems in the treatment process of the disease. Since coughing is due to some lesions in the lungs, the lungs have to cough out some inflammatory substances, which can make the inflammation of the lungs heal faster. However, because the suppression of cough medicine can make the coughing decrease, so that the dirty things in the lungs are not easy to be excreted, which will prolong the time for the inflammation in the lungs to get better, and even sometimes the inflammation in the lungs remains due to the things not being excreted, leading to chronic lesions.