There are many hazards of drugs to the human body, specifically the following: First, harm to human physiology, drugs in the application process or the process of discontinuation, will make the human body some symptoms of maladjustment, such as anxiety, depression, hot and cold, body rash, tears, runny nose, sweating, nausea, vomiting, abdominal pain, diarrhea, etc.. There is also a great danger to the central nervous system, which is prone to mental abnormalities and even memory loss. The second point is that drugs are very destructive to the mind, and people who use drugs tend to have a weak will and are driven by their desires, which can easily lead to crime. The third point is that infectious diseases, more commonly sexually transmitted diseases such as hepatitis B, syphilis, AIDS, etc., are easily spread through drugs. The fourth point, affect the life expectancy, drug addicts generally do not live longer than 40 years.