Marijuana legalization has not led to increased youth marijuana use and has not served as a "gateway drug" to other psychoactive and addictive drugs. Its impact on traffic accidents has been modest at best and mixed.
Learning from the experiences of states that have legalized marijuana is essential. For one, they have not seen the much-feared explosion of youth use. An April 2024 study in JAMA Psychiatry analyzed survey data from 1993 to 2021 and found that teen cannabis use was no more common in the 24 states that legalized adult recreational use than elsewhere. According to a systematic review published in 2022, 10 earlier studies found increases in adolescent use, but 10 others showed no effect, and two showed reductions…Other drug use didn’t increase, either. Use of the deadliest drugs — opioids — dropped significantly among youth as marijuana legalization spread. Prescription opioid misuse by 12th graders fell from 9.5 percent in 2004 to 1 percent in 2023; heroin use declined similarly. Most states showed little change or even a decline in opioid misuse and overdoses after passage of recreational or medical marijuana laws. And legalized cannabis products have not been linked to fatal poisonings or injuries. (Deaths linked to lung injuries from vape pens seem to have been caused by illegal products and tended to be less common in legal states.) . . .Some studies show that it increases stoned driving, with one linking a 16 percent rise in fatalities with recreational legalization. Others, however, find no effects or even a reduction, due perhaps to people using cannabis instead of alcohol
From a New York Times op-ed piece.
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