A new United Nations report says drug abuse kills some 200,000 people a year.
The report estimates that some 27 million people worldwide are problem drug users.
According to the report by the UN Office on Drugs and Crime (UNODC), cannabis remained the most widely used drug with up to 224 million users worldwide.
The report says that some 230 million people -- or 5 percent of the world's population -- used illegal drugs at least once in 2010.
The report notes that global production and use of illegal drugs was relatively stagnant last year.
Afghanistan remains world's largest opium producer.
Based on reporting by AFP, AP, and RFE/RL