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Daily Pot Use Tied To Age of First Psychotic Episode

An anonymous reader writes "Reuters reports, 'In a study of adults who experienced psychosis for the first time, having smoked marijuana daily was linked to an earlier age of onset of the disorder.' ..."This is not a study about the association between cannabis and psychosis, but about the association between specific patterns of cannabis use ... and an earlier onset of psychotic disorders,' Dr. Marta Di Forti, who led the research at the Institute of Psychiatry at Kings College, said in an email. Among more than 400 people in South London admitted to hospitals with a diagnosed psychotic episode, the study team found the heaviest smokers of high-potency cannabis averaged about six years younger than patients who had not been smoking pot. Psychosis is a general term for a loss of reality, and is associated with several psychiatric diseases, including schizophrenia and bipolar disorder. ... "The thorny question is whether they might otherwise have developed the disease or would have not had mental illness. It's a distinction we haven't figured out yet," Compton said. ... It is still unclear whether there are safe levels of use for cannabis, she added. '"

8 of 382 comments (clear)

  1. Re:Cause and effect may be backwards by Anonymous Coward · · Score: 2, Informative

    A) It's proven that people with mental illness do tend to self medicate.

    B) x -> y DOES NOT MEAN y -> x i.e. If many people that have experienced a psychotic episode smoked pot, it does NOT mean smoking pot increases the likelihood of psychotic episodes.

  2. Re:Cause and effect may be backwards by Zakabog · · Score: 5, Informative

    From the article -

    But the evidence has been unclear. For example, one recent study from the Netherlands found it's equally possible that people prone to psychosis may be more likely to smoke pot, possibly as a way of "self-medicating" (see Reuters Health article of December 25, 2012, here: http://reut.rs/1d7aIvU)

  3. Re:Cause and effect may be backwards by Anonymous Coward · · Score: 3, Informative

    methinks your sarcasm detector is busted.

  4. Re:Reefer madness? by JoeMerchant · · Score: 2, Informative

    Climate deniers aren't the only ones who cherry-pick "scientific studies" for publicity campaigns.

  5. Re:Cause and effect may be backwards by Curtman · · Score: 5, Informative

    Marijuana use has increased drastically since the 1920's, from thousands to millions. There is no corresponding increase in psychosis. Does that fit your narrative?

  6. Re:Cause and effect may be backwards by SpankiMonki · · Score: 2, Informative

    This just in:

    Heavy adolescent pot use (particularly the high-potency "purple erkle thunderskunk" variety) can cause the premature loss of the ability to form paragraphs.

    (sorry, but I couldn't resist)

  7. Pot? by koan · · Score: 4, Informative

    Some of these guys are smoking high quality oil on titanium nails, that shit is potent (having smoked it myself) I stay away from it because it makes me useless, and then it makes my tolerance so high I can only get a buzz eating a 500mg 5150 bar.

    Just wait, someone is going to get it down to a THC powder, and then...

    I quit smoking not too long ago, I had sweats, irritability, and sleeplessness for ~2 weeks, this isn't 1960's pot.

    --
    "If any question why we died, Tell them because our fathers lied."
  8. Re:Source data for this study? by tgv · · Score: 3, Informative

    The number 420 apparently means something in this context. From Wikipedia: "420, 4:20, or 4/20 (pronounced four-twenty) is a code-term used primarily in North America that refers to the consumption of cannabis and by extension, as a way to identify oneself with cannabis subculture or simply cannabis itself."