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New Harvard Study: Marijuana Does Not Cause Schizophrenia

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Marijuana schizophreniaCourtesy of The Joint Blog

A new Harvard study published in the journal Schizophrenia Research has found evidence that cannabis use, regardless of how often or in what quantities, does not lead to an increase in schizophrenia, despite decades of propaganda to the contrary.

For the study, researchers examined patients separated into four sample-groups; “sample 1: 87 non-psychotic controls with no drug use; sample 2: 84 non-psychotic controls with cannabis use; sample 3: 32 patients with a schizophrenia spectrum psychosis with no drug use; sample 4: 76 patients with schizophrenia spectrum psychosis with cannabis use. All cannabis using subjects used this drug during adolescence, and no other substance, with the exception of alcohol. Structured interviews of probands and family informants were used to obtain diagnostic information about probands and all their known relatives.”

After conducting this study, the Harvard researchers concluded that; “The results of the current study suggest that having an increased familial morbid risk for schizophrenia may be the underlying basis for schizophrenia in cannabis users and not cannabis use by itself.”

The study, which was led by Lynn DeLisi, MD, Professor of Psychiatry at Harvard Medical School, can be found by clicking here.

This is one of several schizophrenia-related studies released this year; one government funded study found that cannabis may actually combat the symptoms of schizophrenia, and another found that it may lead to better cognitive function in those who are schizophrenic.

Source: TheJointBlog.Com

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Johnny Green

19 Comments

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  2. Please hit me up,,my phone number is,, 911,, No
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  3. Please hit me up,,my phone number is,, 911,, No
    need to mail or deliver. Just give your address and the best time for you. My friend will come by for the
    pick up in a nice white car with Psychedelic lights all a glowing. We are big
    time buyers, we have plenty of other peoples money and cant be bothered with small time samples. If you want we can take for a ride in our cool veh. as we make our other pick ups.

  4. This logic is unfounded, captain. IF there was ANY relationship to “developing the disease”, we would see a corresponding rise in schizophrenia over the decades. IT ISN’T THERE. Just like the “genetic defects”, reduction in “sex drive”, “cognitive dis-function” or the other total BS prohibitionist LIES over the decades. Those who support prohibition are criminals.

  5. I know for a fact that meth use can cause schizophrenia…i have seen it too many times. There may be other drug use present in some of those genetically predisposed. Too many days without sleep also causes symptoms. I am prone to develop psychotic symptoms if i DONT use marijuana for my sanity regularly. The “heavy user” may be doing the world a favor. People need to know which strains are best for them. Indicas help me but Sativas increase the thinking process into fits of OCD and yes almost drive me crazy. If I can’t sleep…world watch out! There are always other underlying factors to skew a study. Don’t judge the plant with generalized statements because every user is different. different strains for different needs thats the beauty of it.

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  7. Results from Harvard study

    There was an increased morbid risk for schizophrenia in relatives of the cannabis using and non-using patient samples compared with their respective non-psychotic control samples (p=.002, p<.001 respectively). There was no significant difference in morbid risk for schizophrenia between relatives of the patients who use or do not use cannabis (p=.43).

    Conclusions

    The results of the current study suggest that having an increased familial morbid risk for schizophrenia may be the underlying basis for schizophrenia in cannabis users and not cannabis use by itself.

    ************************************************************************************************************

    So there is a relationship between schizophrenia symptoms/diagnosis and marijuana use. If there is schizophrenia in genetic background then marijuana use can increase risk of developing the disease. Also heavy users may develop psychotic symptoms resembling schizophrenia.

    Be careful out there.

  8. This is really great news that a Harvard study proves this last piece of hope for the prohibitionist wrong. I do wonder how long people will still argue that it causes schizophrenia. Takes a while for the lies and ignorance to be put to bed.

  9. Immortal Illumined on

    the greatest plant in the universe is almost free, LET FREEDOM RING!!!13

    i expect harvard to be a leading advocate for this magical plant, well played

    if we cannot find a way we will make one…

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  10. I always told myself, that it had nothing to do with our conversations with the three of us. As a matter of fact it usually shut the other guy up because he could never win our argument about medical marijuana. Oddly, all our conversation’s were very peaceful and intellectual. So when medicated we all go by the rule “Not to believe everything we think”
    (This was posted as a jocular statement)

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