Pot and brain development
Brain not fully developed until 24. Weekly use during teenage years can permanently impact cognative development, particularly memory and problem solving
Duke university study conducted over 40 years with 1000 participants finds regular pot use by adolescents shaves 8 points from IQ by adulthood
Ragnar Frisch Centre for Economic Research in Oslo, Norway used mathematical model to produce similar results (8pt IQ drop) but disagrees with some of duke study’s findings. Suggests social factors should be considered … those that smoke regularly have lower self-control, antisocial behavior, less stable family lives which also contributes to IQ loss.
Fatal car crashes involving pot have tripled. “alcohol contributed to about 40 percent of traffic fatalities throughout the decade … The researchers found that drugs played an increasing role in fatal traffic accidents. Drugged driving accounted for more than 28 percent of traffic deaths in 2010, which is 16 percent more than it was in 1999 … The researchers also found that marijuana was the main drug involved in the increase. It contributed to 12 percent of fatal crashes, compared to only 4 percent in 1999. If a driver is under the influence of alcohol, their risk of a fatal crash is 13 times higher than the risk of the driver who is not under the influence of alcohol,” Li said. “But if the driver is under the influence of both alcohol and marijuana, their risk increased to 24 times that of a sober person.”
Marijuana reported as substance of abuse by 740,800 patients, 23% were daily users. 33% of daily users had co-occuring psychiatric problem. 55% of marijuana substance abuse admissions under age of 25. 9% of all users become addicted.