The harm of drugs is mainly manifested as the following: first, the toxic effects on the body, long-term drug use can lead to the symptoms of poisoning. Such as patients can appear drowsy, sensory dullness, motor disorders and disorientation. Second, if the drug is suddenly discontinued, a withdrawal reaction can occur, which can cause various complications and in severe cases can lead to the death of the addict. Third, people who use drugs often experience mental disorders, such as hallucinations and loss of personality. Fourth, because intravenous drug use can often bring about infectious comorbidities, such as hepatitis B, AIDS, syphilis, and other infectious diseases. Fifth, drug abuse can also cause great harm to families and society, leading to family break-ups, huge losses and wastage of social wealth, and even disturbance of social order, posing a threat to social stability.