I find drug abuse has become a major threat to humanity. Being one of the causes of crime, causing disorder and security, degeneration of the race, human dignity, undermining of family happiness, affecting health and especially infectious diseases. transmission of HIV / AIDS in the community; Consequences and harms caused by drug addicts cause serious impacts on economic development, threatening the stability, prosperity and longevity of each nation and each ethnic group. what's your opinion 
It can both useful both positive and negative , it can positively help someone to aid someone , to heal someone by using this drugs to give an action or solution to an problem , but on the vice versa some of people tend to abuse the drugs and they been addicted though , and by this drugs many factors a negative factors can be happen such as the various crime. So I Think the best way is limit the drugs I think , and always prescribe by doctors.