Licorice Tablet is a kind of compound preparation of drugs, the clinical use of which has a good effect of suppressing cough, expectorant and asthma. This drug contains licorice, opium, camphor, anise, fennel oil and so on, the drug itself has a good effect of suppressing cough, expectorant. The drug itself has a good effect of suppressing cough and expectorant, because the opium contained in the drug plays a central role in suppressing cough, camphor has a local anesthesia of the airway, expectorant, anise and fennel oil can stimulate the secretion of glands in the airway wall after inhalation, make the phlegm become thin, and promote its expulsion. Licorice has a hormone-like effect, which can make the inflammatory reaction of congestion and edema of airway mucosa reduce.