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Medical Marijuana Does Not Reduce Opioid Deaths

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Revisiting a 2014 study that suggested states with medical marijuana saw fewer opioid deaths, Stanford researchers in fact found no connection between marijuana availability and fatal opioid overdoses.

 

Legalizing medical marijuana does not reduce the rate of fatal opioid overdoses, according to researchers at the Stanford University School of Medicine

 

Medical marijuana does not reduce opioid deaths

Credit; Stanford University

 

The finding contradicts a 2014 study that legal-pot advocates, public officials and even physicians have touted as a reason to legalize marijuana. That study found lower rates of fatal opioid overdoses in the states that had legalized marijuana for medical purposes than in states where marijuana remained illegal.

 

The Stanford study, which revisited the issue after many more states had legalized medical marijuana, found no evidence of a connection between opioid deaths and the availability of medical cannabis, said Keith Humphreys, PhD, professor of psychiatry and behavioral sciences.

 

Keith Humphreys

Credit; Stanford University

 

 

“If you think opening a bunch of dispensaries is going to reduce opioid deaths, you’ll be disappointed,” Humphreys said. “We don’t think cannabis is killing people, but we don’t think it’s saving people.”

 

A paper describing the new study was published online June 10 in Proceedings of the National Academy of Sciences. Humphreys is the senior author. The lead author is postdoctoral scholar Chelsea Shover, PhD.

 

Medical pot now legal in 47 states

 

In 1996, California became the first state to legalize medical marijuana. By 2010, 13 states, most of them in the West, had legalized medical marijuana. Today, 47 states permit some version of medical pot.

 

For the new study, the Stanford researchers used the same method employed in the 2014 study to evaluate the connection between legalized medical marijuana and fatal opioid overdoses. They confirmed the findings from the 2014 study, but when they looked at opioid deaths up to 2017 — by which point most states had legalized some form of medical marijuana, if not recreational marijuana — they found that the opposite was true: States with legal medical marijuana had a higher rate of deaths due to opioid overdose.

 

After the 2014 study was released, medical marijuana proponents and some public officials interpreted the results to mean that, given access to legalized pot, people would turn to it rather than opioids for pain relief or recreation. Yet when the Stanford researchers compared states that have more restrictive medical marijuana laws with those that allow recreational marijuana, they found no correlation between opioid overdose mortality and the level of restriction.

 

“Accounting for different types of laws didn’t change the bottom line,” Shover said.

 

Also, given that only 2.5% of the U.S. population uses medical marijuana, it’s unlikely that use could affect mortality statistics, the researchers said.

 

‘Something else about those states’

 

Humphreys said the results of the 2014 study may have reflected policies and conditions in states that legalized medical marijuana early. Those states tended to be wealthier and more politically liberal, with greater access to addiction treatment and to naloxone, which reverses the effects of opioids and can prevent overdose fatalities. The states that legalized pot early also incarcerate fewer people for drug use, Humphreys added. When people are released from prison, where they lack access to drugs and lose tolerance to them, they may try to use the same levels as they did before they were incarcerated, leading to overdose.

 

The finding of lower death rates “wasn’t about the cannabis,” Humphreys said. “It was something else about those states.”

 

Humphreys and Shover said they believe that medical marijuana provides benefits and that research into its effectiveness should continue.

 

“There are valid reasons to pursue medical cannabis policies, but this doesn’t seem to be one of them,” Shover said. “I urge researchers and policymakers to focus on other ways to reduce mortality due to opioid overdoses.”

 

Humphreys is a member of the Wu Tsai Neurosciences Institute at Stanford, the Stanford Center for Innovation in Global Health and the Stanford Center for Health Policy.

 

Researchers at the Network for Public Health Law and New York University also contributed to the study.

 

The research was funded by the National Institutes of Health (grant T32DA035165) and the U.S. Department of Veterans Affairs.

 

Stanford’s Department of Psychiatry and Behavioral Sciences also supported the work.

 

 

 

Contacts and sources:

Mandy Erickson

Stanford Medicine

 

Citation: Association between medical cannabis laws and opioid overdose mortality has reversed over time.

Chelsea L. Shover, Corey S. Davis, Sanford C. Gordon, Keith Humphreys. Proceedings of the National Academy of Sciences, 2019; 201903434 DOI: 10.1073/pnas.1903434116

 

 

 

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  • stonecold68

    There was an “explosion” in opiates related fatal overdose`s that began emerging from Canada in rapid succession with fentanyl fast becoming the much cheaper,stronger and readily available option for chronic heroin addicts.Where addicts “consciously chose” to substitute merely out of desperation, regardless. So the long misunderstood Indian hemp/cannabis,a.k.a (legal term) marihuana or marijuana for a clear narrative propaganda purpose undoubtedly, so many years assumed and inconveniently labelled “the GATEWAY drug” uniformly by misguided majority of community who staunchly confess to “know nothing” about mind altering substances followed with reiterated discord yet consider opinion on the subject worthy of their pointless,uneducated “values”, needs to be evaluated so indirectly as a “factor” in fatal overdose stats!
    FFSake….To consider the political dillusional toils, out of touch criminal penalties, unwarranted,unfounded persecution of a “silent” harmless,achiever of a weed that STILL lives and breathes hatred,indiscriminate misrepresentation by a country whose foundation to prosper above others was provided by it`s booming crops production of the green demon weed and ALL it`s many industrial,medical,textile,timber benefits and properties…..IT REMAINS ALWAYS SILENTLY #WINNING. Just think how life would be if we to were created without a “STOOPID MOUTH” to bury us.

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