The state does plan to add significant new limits before patients get permission to use marijuana to treat PTSD.
"It's important to think about if these laws can have adverse health impacts", Deborah S. Hasin, PhD, professor of clinical epidemiology at Columbia University Medical Center, and lead author of the study, told Healthline. That policy change boosted medical marijuana patient applications from 500 per month to more than 10,000 per month.
If the legislation becomes law, NY would join Minnesota, New Jersey, Michigan, California, Illinois, Connecticut, Delaware, Maine, Massachusetts, New Mexico, Arizona, Washington, Rhode Island and OR as states that allow those with PTSD OR acute stress disorder to legally use medical cannabis.
The researchers analyzed data from 118,497 adults included in three national surveys: the 1991-1992 National Longitudinal Alcohol Epidemiologic Survey, the 2001-2002 National Epidemiologic Survey on Alcohol and Related Conditions, and the 2012-2013 National Epidemiologic Survey on Alcohol and Related Conditions-III.
Yes, especially with other states enacting their own versions of legal medical marijuana.
"Future studies are needed to investigate mechanisms by which increased cannabis use is associated with medical marijuana laws, including increased perceived safety, availability, and generally permissive attitudes", said Hasin.
While many people have welcomed the legalization of medical marijuana, others have raised concerns that it will increase recreational use of the drug, with some negative implications.
It also includes research published in January that concluded there was no relationship between adolescent use of marijuana and state laws legalizing the drug's use for adults.
Much attention has been paid to the effect on youth, and studies have not documented more teen use because of marijuana legalization.
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The new conclusions, published in JAMA Psychiatry, are drawn from three national studies conducted between 1991 and 2013.
The new study can't say medical marijuana laws caused the increases, but Hassin said it's possible adults interpreted the laws to mean marijuana is harmless.
Researchers found that illegal use of marijuana and rates of cannabis use disorder rose to a greater extent in US states that adopted laws legalizing marijuana for medical purposes than in states that didn't adopt such laws.
The conclusions from this latest study, however, are significantly different than other studies on marijuana laws and teen use of the drug.
Analysts at Cannabis Benchmarks said high earnings are likely driven by a number of factors, including fear over a federal crackdown in the state.
The analysis also revealed that in remaining early-MML states, the prevalence of use and disorders increased.
But the authors of the study also note several limitations.
Dr. Wilson Compton, deputy director of the U.S. National Institute on Drug Abuse, agreed that differences in state laws matter, including how many dispensaries are allowed under the law and how tightly they are regulated.