Problematic cannabis use rose by 37 percent, from 0.90 percent to 1.23 percent, after recreational marijuana legalization.
The number of respondents aged between 12 to 17-years-old who had cannabis use disorder rose"slightly" by 25 percent compared with those in the same group in other states, from 2.18 percent to 2.72 percent, the authors wrote.
But among participants aged between 18 to 25-years-old, the rates of cannabis use in the past month, frequency and cannabis use disorder didn't change.legalisationMarijuana for recreational use has been legalized in 11 states and the District of Columbia. Using weed occasionally is not thought to cause substantial problems, the authors said.
Senior author Dr. Silvia S. Martins, associate professor of epidemiology at Columbia University Mailman School of Public Health, commented:"Cannabis use disorder in adolescence is associated with long-term adverse health, economic and social consequences."Given our findings on problematic use across age groups, legalization efforts should coincide with prevention and treatment.
Hamilton urged people to be cautious of believing assertions made by suppliers and manufacturers related to cannabis, such as"Although cannabis is less harmful than many other drugs it is not completely risk free, part of the problem is we are still unable to predict who is at risk of developing problems until they are exposed to the drug, by which time it is often too late," Hamilton said.
But he said the results also don't mean cannabis shouldn't be legalized, rather"that for the small proportion of users who develop problems support services need to be adequately funded and available, something other states and countries should factor in when thinking of changing their cannabis policies."
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