World Drug Report 2011
"Cannabis is by far the most widely used illicit drug type, consumed by between 125 and 203 million people worldwide in 2009. This corresponds to an annual prevalence rate of 2.8%-4.5%. In terms of annual prevalence, cannabis is followed by ATS (amphetamine-type stimulants; mainly methamphetamine, amphetamine and ecstasy), opioids (including opium, heroin and prescription opioids) and cocaine. Lack of information regarding use of illicit drugs – particularly ATS - in populous countries such as China and India, as well as in emerging regions of consumption such as Africa, generate uncertainty when estimating the global number of users. This is reflected in the wide ranges of the estimates."The Office produces many other publications in areas such as alternate development, corruption, human trafficking by organized crime, demand reduction strategies, drug testing, etc.
"While there are stable or downward trends for heroin and cocaine use in major regions of consumption, this is being offset by increases in the use of synthetic and prescription drugs. Non-medical use of prescription drugs is reportedly a growing health problem in a number of developed and developing countries. Moreover, in recent years, several new synthetic compounds have emerged in established illicit drug markets. Many of these substances are marketed as ‘legal highs’ and substitutes for illicit stimulant drugs such as cocaine or ‘ecstasy.’ "
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