Study co-author Louisa Degenhardt, of the National Drug and Alcohol Research Centre in Australia, said the popularity of illicit drugs was linked to cost and supply.
"There's more that we need to understand about that, but we think that, particularly for occasional users, if drug prices go up then their level of use goes down," the Herald Sun quoted Prof Degenhardt as saying.
The study is one of three in a series about addiction to be published in The Lancet.
Source: ANI
