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Canadian Research Study Demonstrates Medical Cannabis Safety Profile


marijuana science research cannabisMedical Cannabis Patient Advocates Call on Federal Government To Remove Barriers That Undermine Domestic Cannabis Research

Researchers associated with McGill University and the University of British Columbia recently published results from a study showing that medical cannabis patients were no more likely to suffer serious adverse events during treatment than non-cannabis patients. “Cannabis for the Management of Pain: Assessment of Safety Study (COMPASS),” published online in the Journal of Pain, monitored the health of chronic pain patients using medical cannabis and of a control group.  The study was led by Dr. Mark Ware, Director of Clinical Research of the Alan Edwards Pain Management Unit at the McGill University Health Centre and Executive Director of the non-profit Canadian Consortium for the Investigation of Cannabinoids.

“This is the first and largest study of the long-term safety of medical cannabis use by patients suffering from chronic pain, ever conducted,” said Dr. Ware. “We found that medical cannabis, when used by patients who are experienced users and as part of a monitored treatment program for chronic pain over one year, appears to have a reasonable safety profile. Anyone seriously interested in the medical use of cannabis should familiarize themselves with the COMPASS study: its contents, strengths and limitations.”

The COMPASS study monitored chronic non-cancer pain patients who used medical cannabis, as well as a control group. Study participants were drawn from seven clinical locations across Canada, with pain management expertise and were closely monitored for one year. The study no found increase in serious adverse events associated with medical cannabis use.

“Dr. Ware’s research helps us clinically document the safety profile of medical cannabis, which is a highly relevant to public health questions facing America,” said Steph Sherer, executive director of Americans for Safe Access. “The COMPASS study is a great example of what cannabis research in America could look like if we broke down federal barriers holding back research.”

Under the Controlled Substances Act, cannabis is listed as Schedule I drug, the most highly restricted classification. The National Institutes of Drug Abuse is the only federally-licensed grower of cannabis that can legally provide cannabis to clinical researchers.  Prior to June of this year, cannabis researchers had to undergo a special Public Health Service Review process to gain approval to begin official clinical studies, a process with a documented history of delaying research projects by several years.

Further Information:

Office of National Drug Control Policy Lifts Public Health Service Review on Marijuana Research
Drug Caucus Holds Hearing on Barriers to Cannabidiol Research
Cannabis for the Management of Pain: Assessment of Safety Study (COMPASS)

Source: Americans for Safe Access

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Johnny Green


  1. This blog is ideal for those of us who support legalization and who personally know from experience there is no detrimental effect on your mental health. For me pot is medicine and is not a gateway drug leading to serious narcotic abuse. Helps with sex, and my nerves versus having to take an addictive anti-depressant like Prozac or Valium.

    In regard to sex, I don’t need it to maintain an erection like having to take Viagra, marijuana enables me to abstain from reaching climax too soon. I can literally last for a couple of hours, and between the oral sex and intercourse my wife typically has 8-10 orgasms–or more sometimes–before demanding that I finish as she’s totally worn out.

    Thank you, Weed Blog.

  2. The biggest problem is skewed studies (bad science). Those studies we should highlight and refute, not with anecdotes but with unbiased studies. It’s only in the last couple of years that relatively unbiased studies have been attempted. Before that, it was either drug control people paying for proof of harm, or blue-sky weed advocates who could find only positive outcomes.

    There is large conceptual difference between rigorous scientific studies and anecdotal, experience-based knowledge. Sometimes it seems silly, but the scientific method is the best method we have to make convincing arguments. Lets encourage people to do these kinds of (unbiased) studies instead of berating them for studying things we think we already know the answer to.

  3. Medical and recreational marijuana strains 816 384 7475 patients and
    smoker consume marijuana for depression and other issues like cancer
    ,brain tumor and others!is illegal to purchase marijuana without a prescription card, but some dispensary accept which is wrong.

  4. Well what reason would there be anyway,,that the Canadian study results not be transferable to the U S??????????????

  5. Trichometrist on

    “Anecdotal ” #bullshit
    “Not enough testing ” has been
    “Allowed ”
    Guess what , the tests are being done!
    The genie is out of the bottle.
    The tipping point, 500 lb GREEN GORILLA
    AT some point the general public will realize “THEY LIED ”
    And #prohibition of cannabis is #GENOCIDE

  6. saynotohypocrisy on

    Good, but was there any reason to think they would come up with any problems? They’re only confirming what thousands of year of medicinal use has already well proven. It’s a shame that money and effort has to go into confirming the obvious when there’s such a shortage of research dollars.

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