1. Cannabis
Street names: Weed, Herb, Pot, Grass, Ganja
It hardly comes as a surprise that cannabis is first on the list of 11 Most Commonly Used Illegal Drugs. All three reports agree that cannabis is most widely used illegal drug. According to World Drug Report, 181.79 million people consumed cannabis. It is very likely that the number will continue to rise since many countries have been considering to allow the use of cannabis in medical treatments, because numerous studies have shown that it is effective in alleviating the pain in patient with chronic illnesses, as well as reducing vomiting and nausea in patients who receive chemotherapy.
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