Ketamine is the common name of ketamine, English Ketamine, commonly known as “K-boy” or “Jia”, because of its white powder, it is also called “sand”, smoking ketamine is also called “playing sand”. Ketamine is the scientific name of ketamine, also known as ketamine, is a non-barbiturate intravenous general anesthetic. Clinically used as a surgical anesthetic or anesthetic induction agent, with some potential for psychiatric dependence. Ketamine was invented in the United States in the 1960s and was widely used as an anesthetic in field trauma surgery during the Vietnam War. In 1971, the first cases of ketamine abuse were reported in the cities of San Francisco and Los Angeles; since then, tablets and powders have appeared on the street drug black market. Ketamine abuse was mainly in entertainment venues where all-night dances were held. Since 1999, ketamine has been introduced into Japan, Thailand, and Hong Kong, where it has been a major problem. On May 9, 2001, China’s State Drug Administration placed ketamine under Class II psychotropic substance management. Ketamine can be used as a cardiovascular stimulant, and overdose can be fatal, with a certain degree of mental dependence. ketamine addiction, under the effect of the drug, the user will shake his head wildly, easily shaking the cervical vertebrae; at the same time, the wild shaking will also cause heart and respiratory failure. Overdose or long-term abuse can cause fatal damage to the heart, lungs and nerves, and the damage to the central nervous system is more powerful than methamphetamine. Consequences of long-term abuse: It can cause memory loss and cognitive impairment, and can lead to impairment of heart function, as well as physical and psychological dependence, and can cause hallucinations and injury to oneself or others. In recent years, clinical research has found that k-powder can lead to damage to the human urinary system, causing symptoms such as frequent urination, urinary urgency, painful urination, blood in the urine, and the mechanism of the damage is unclear, the treatment effect is poor, male abusers part of the sexual dysfunction.