In 2015 about a quarter of a billion people used drugs. Of these, around 29.5 million people - or 0.6 per cent of the global adult population - were engaged in problematic use and suffered from drug use disorders, including dependence. Opioids were the most harmful drug type and accounted for 70 per cent of the negative health impact associated with drug use disorders worldwide, according to the latest World Drug Report, released today by the United Nations Office on Drugs and Crime (UNODC).

unodc.org