Licorice tablets are a kind of compounded proprietary Chinese medicine preparation, which contains many ingredients, including opium powder, which is a substance extracted from poppy husk, the active ingredient contains morphine, which contains about 10%, and the content of opium powder in licorice tablets is also very small, and it has a good coughing effect. In clinical practice, opioid powder can mainly inhibit the central nervous system and can suppress the coughing impulse. Since opioid powder itself has addictive properties, it cannot be taken for a long time. In clinical practice, it is mainly for dry coughs without phlegm that are more intense, and licorice tablets can be taken appropriately for a short period of time.