Tracking the use of illegal drugs is a challenge because of their illegality, but researchers from Australia estimate that 149 to 271 million people around the world use them. Pot (cannabis) is the most widely used. This study did not include hallucinogens, inhalants, anabolic steriods or ecstasy. For perspective, the WHO has estimated that illegal drug use causes 250,000 deaths annually, compared with 2.25 million due to alcohol and over 5 million caused by tobacco.
PositiveTip: For health and safety avoid all illegal drugs, along with the more popular legal ones such as alcohol and tobacco!