But with that shortcoming duly noted, the report does offer some useful perspectives. The focus of he report is on nonmedical use of "opiates, cocaine, cannabis, amphetamine-type stimulants (ATS) and new psychoactive substances (NPS)." About 5% of the world population between the ages of 15-64--roughly 250 million people--used drugs in this way in the last year, and roughly one-tenth of that number might be classified as having a "drug problem."
One of the major changes in US drug use in the last decade or so has been the rise in the death rate from precription opioids and heroin.
The report describes the health issues of cannabis use in this way (footnotes omitted):
"The nature and extent of the potential health risks and harms associated with cannabis use are continually under debate. Cannabis use can be perceived to be relatively harmless when compared with the use of other controlled psychoactive substances and also in relation to the use of tobacco or alcohol. However, lower risk does not mean no risk: there are harmful health effects associated with a higher frequency of cannabis use and initiation at a very young age, especially among adolescents during the time of their cognitive and emotional development. Adverse health effects of cannabis use associated with cognitive impairments or psychiatric symptoms are well documented
in the scientific literature. Hence, cannabis use disorders require clinically significant treatment interventions.
"The transition from drug use to drug dependence occurs for a much smaller proportion of cannabis users than for opioid, amphetamine or cocaine users. However, because so many people use cannabis, this translates into a large number who experience cannabis use disorders; for example, in the United States, of the 22.2 million current cannabis users in 2014, 4.2 million people aged 12 or older had a cannabis use disorder diagnosed in the previous year. Cannabis use disorders are estimated to occur in approximately 1 out of every 11 persons (9 per cent) who have ever used cannabis, and the proportion increases significantly to one out of every six persons (17 per cent) who started using cannabis in their teens and to 25-50 per cent of daily cannabis users. ...
In the United States, the number of daily (or near-daily) cannabis users, measured by the number using cannabis on 20 or more days in the past month and the number using cannabis on 300 or more days in the past year, rose significantly after 2006, by 58 and 74 per cent, respectively. However, this increase in daily (or near-daily) cannabis use has not translated into an increased number of people seeking treatment, even when those in treatment referred by the criminal justice system are excluded.Finally, some interesting shifts in global drug markets appear to be underway. One is the shift from agriculture to manufacturing--that is, in the direction of amphetamines and psychoactive substances like Ecstasy. Another is a shift toward being able to purchase drugs on largely anonymous internet sites sometimes called the "dark" internet, using anonymous methods of payment like Bitcoin. For example, here's a figure showing how seizures of various drugs have changed in the lat 15 years: clearly, amphetamines are way up.
"The purchasing of drugs via the Internet, particularly the “dark net”, may have increased in recent years. This trend raises concerns in terms of the potential of the “dark net” to attract new populations of users by facilitating access to drugs in a setting that, although illegal, allows users to avoid direct contact with criminals and law enforcement authorities. As the “dark net” cannot be accessed through traditional web searches, buyers and sellers access it through the “Onion Router” (TOR) to ensure that their identities remain concealed. Products are typically paid for in bitcoins or in other crypto-currencies and are most often delivered via postal services. A number of successful law enforcement operations worldwide have taken place in recent years to shut down trading platforms on the “dark net”, such as “Silk Road” in October 2013 or “Silk Road 2.0” in November 2014 ... However, as one marketplace closes, the next most credible marketplace tends to absorb the bulk of the displaced business.
"A global survey of more than 100,000 Internet users (three quarters of whom had taken illegal drugs) in 50 countries in late 2014 suggested that the proportion of drug users purchasing drugs via the Internet had increased from 1.2 per cent in 2000 to 4.9 per cent in 2009, 16.4 per cent in 2013 and 25.3 per cent in 2014. The proportion of Internet users making use of the “dark net” for drug purchases had also increased, reaching 6.4 per cent (lifetime) in 2014, including 4.5 per cent (70 per cent of 6.4 per cent) who had purchased drugs over the “dark net” in the previous 12 months (ranging from less than 1 per cent to 18 per cent)."For an earlier post on drug policy, see "Putting Drug Policy Tradeoffs on the Table" (April 14, 2016).