Some cough medicine prescriptions contain the narcotic drug codeine, as well as ephedrine, which produces psychoactive effects. Long-term use, especially if the prescribed dosage is not increased, can lead to dependence and addiction. The core feature of “cough water” addiction is that the patient clearly knows that his behavior is harmful but cannot control himself. Usually, patients who drink a little bit of the medicine when they are sick do not become “addicted”. However, if the patient drinks a lot of it over a long period of time, drug dependence can develop. ”The concept of addiction comes from drug dependence (or drug addiction). The World Health Organization (WHO) Expert Committee defines drug addiction as a mental and sometimes physical state caused by the interaction of a drug with the body. It manifests a compulsive continuous and regular use of the drug and other reactions in order to feel its psychoactive effects or to avoid the discomfort caused by withdrawal. The connotation of addiction now encompasses both substance (drug) addiction and behavioral addiction. The cough medicine that acts directly on the nerve center usually contains codeine, ephedrine and other ingredients that can easily cause excitement, but the content of this ingredient is not large, and the excitement produced by the nervous system is only equivalent to 1/8 to 1/12 of morphine. “. But if you drink it for a long time and in large quantities, drug dependence will develop. Heroin addiction identification: The initial use of euphoria, the inability to concentrate, will produce a dream phenomenon. Overdose causes acute intoxication, symptoms include drowsiness, respiratory depression, hypotension, and small pupils. There is a high degree of psychological and physical dependence, and craving will occur after long-term use and discontinuation.