Licorice tablets are a kind of compound drug, the main effect of which is to tonify the qi and benefit the spleen, to harmonize the middle and slow down the emergency, and to reconcile the effects of all medicines. This drug contains licorice, opium, camphor, star anise, anise oil, etc. The drug itself has good cough suppressing and expectorant effects. Because the opium contained in the drug plays a central cough suppressant effect, camphor has a local anesthetic airway and has an expectorant effect, anise and fennel oil can stimulate the secretion of airway wall glands after being inhaled by the airway, making the sputum thin and promoting its discharge. Licorice has a hormone-like effect and can reduce the inflammatory reaction of congestion and edema in the airway mucosa.