Globally, 35 million people are estimated to suffer from drug use disorders and who require treatment services, according to the latest World Drug Report, by the United Nations Office on Drugs and Crime (UNODC).

The higher estimates for 2017 are the result of improved knowledge of the extent of drug use from new surveys conducted in India and Nigeria, both among the ten most populous countries in the world.

The report also estimates the number of opioid users at 53 million, up 56 percent from previous estimates, and that opioids are responsible for two thirds of the 585,000 people who died as a result of drug use in 2017. Globally, 11 million people injected drugs in 2017, of whom 1.4 million live with HIV and 5.6 million with hepatitis C.

"The findings of this year's World Drug Report fill in and further complicate the global picture of drug challenges, underscoring the need for broader international cooperation to advance balanced and integrated health and criminal justice responses to supply and demand," said Yury Fedotov, UNODC Executive Director.

In 2017, an estimated 271 million people, or 5.5 percent of the global population aged 15-64, had used drugs in the previous year. While this is similar to the 2016 estimate, a longer-term view reveals that the number of people who use drugs is now 30-percent higher than it was in 2009. Although that increase was in part due to a 10-percent growth in the global population aged 15-64, data now shows a higher prevalence of the use of opioids in Africa, Asia, Europe and North America and the use of cannabis in North America, South America and Asia compared with 2009.

Estimated global illicit manufacture of cocaine reached an all-time high of 1,976 tons in 2017, an increase of 25 percent on the previous year. At the same time, the global quantity of cocaine seized in 2017 rose by 13 percent to 1,275 tons, the largest quantity ever reported.

North America's synthetic opioid overdose crisis also reached new heights in 2017, with more than 47,000 opioid overdose deaths recorded in the United States, an increase of 13 percent from the previous year, and 4,000 opioid-related deaths in Canada, a 33-percent increase from 2016.

Fentanyl and its analogues remain the key problem of the synthetic opioid crisis in North America, but West and Central and North Africa are experiencing a crisis of another synthetic opioid, tramadol. Global seizures of tramadol jumped from less than 10 kilograms in 2010 to almost 9 tons in 2013 and reached a record high of 125 tons in 2017.

The most widely used drug globally continues to be cannabis, with an estimated 188 million people having used the drug in 2017.

The Report shows that an area where the international community has had a degree of success is in addressing new psychoactive substances (NPS), evidenced by a decline in the number of NPS identified and reported for the first time to UNODC. NPS have not been taken up in the market to the extent feared a few years ago, and the international community has reacted in a timely manner to assess the harms caused by NPS and to schedule those that warranted international control.

Prevention and treatment continue to fall short in many parts of the world, with only one in seven people with drug use disorders receiving treatment each year.

Fifty-six countries reported that they provided opioid substitution therapy in at least one prison in 2017, while 46 countries reported not having such a treatment option in prison settings. Needle-syringe programs are far less available in prison: 11 countries reported their availability in at least one prison, but such programs were confirmed as absent in 83 countries.

The report shows that effective treatment interventions based on scientific evidence and in line with international human rights obligations are not as available or accessible as they need to be, and national governments and the international community need to step up interventions in order to address this gap.