Traditional marijuana, high‐potency cannabis and synthetic cannabinoids: increasing risk for psychosis

Epidemiological evidence demonstrates that cannabis use is associated with an increased risk of psychotic outcomes, and confirms a dose‐response relationship between the level of use and the risk of later psychosis. High‐potency cannabis and synthetic cannabinoids carry the greatest risk. Experiment...

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Published inWorld psychiatry Vol. 15; no. 3; pp. 195 - 204
Main Authors Murray, Robin M., Quigley, Harriet, Quattrone, Diego, Englund, Amir, Di Forti, Marta
Format Journal Article
LanguageEnglish
Published Italy Wiley Subscription Services, Inc 01.10.2016
John Wiley and Sons Inc
Subjects
Online AccessGet full text
ISSN1723-8617
2051-5545
2051-5545
DOI10.1002/wps.20341

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Abstract Epidemiological evidence demonstrates that cannabis use is associated with an increased risk of psychotic outcomes, and confirms a dose‐response relationship between the level of use and the risk of later psychosis. High‐potency cannabis and synthetic cannabinoids carry the greatest risk. Experimental administration of tetrahydrocannabinol, the active ingredient of cannabis, induces transient psychosis in normal subjects, but this effect can be ameliorated by co‐administration of cannabidiol. This latter is a constituent of traditional hashish, but is largely absent from modern high‐potency forms of cannabis. Argument continues over the extent to which genetic predisposition is correlated to, or interacts with, cannabis use, and what proportion of psychosis could be prevented by minimizing heavy use. As yet, there is not convincing evidence that cannabis use increases risk of other psychiatric disorders, but there are no such doubts concerning its detrimental effect on cognitive function. All of the negative aspects are magnified if use starts in early adolescence. Irrespective of whether use of cannabis is decriminalized or legalized, the evidence that it is a component cause of psychosis is now sufficient for public health messages outlining the risk, especially of regular use of high‐potency cannabis and synthetic cannabinoids.
AbstractList Epidemiological evidence demonstrates that cannabis use is associated with an increased risk of psychotic outcomes, and confirms a dose-response relationship between the level of use and the risk of later psychosis. High-potency cannabis and synthetic cannabinoids carry the greatest risk. Experimental administration of tetrahydrocannabinol, the active ingredient of cannabis, induces transient psychosis in normal subjects, but this effect can be ameliorated by co-administration of cannabidiol. This latter is a constituent of traditional hashish, but is largely absent from modern high-potency forms of cannabis. Argument continues over the extent to which genetic predisposition is correlated to, or interacts with, cannabis use, and what proportion of psychosis could be prevented by minimizing heavy use. As yet, there is not convincing evidence that cannabis use increases risk of other psychiatric disorders, but there are no such doubts concerning its detrimental effect on cognitive function. All of the negative aspects are magnified if use starts in early adolescence. Irrespective of whether use of cannabis is decriminalized or legalized, the evidence that it is a component cause of psychosis is now sufficient for public health messages outlining the risk, especially of regular use of high-potency cannabis and synthetic cannabinoids.
Epidemiological evidence demonstrates that cannabis use is associated with an increased risk of psychotic outcomes, and confirms a dose-response relationship between the level of use and the risk of later psychosis. High-potency cannabis and synthetic cannabinoids carry the greatest risk. Experimental administration of tetrahydrocannabinol, the active ingredient of cannabis, induces transient psychosis in normal subjects, but this effect can be ameliorated by co-administration of cannabidiol. This latter is a constituent of traditional hashish, but is largely absent from modern high-potency forms of cannabis. Argument continues over the extent to which genetic predisposition is correlated to, or interacts with, cannabis use, and what proportion of psychosis could be prevented by minimizing heavy use. As yet, there is not convincing evidence that cannabis use increases risk of other psychiatric disorders, but there are no such doubts concerning its detrimental effect on cognitive function. All of the negative aspects are magnified if use starts in early adolescence. Irrespective of whether use of cannabis is decriminalized or legalized, the evidence that it is a component cause of psychosis is now sufficient for public health messages outlining the risk, especially of regular use of high-potency cannabis and synthetic cannabinoids.Epidemiological evidence demonstrates that cannabis use is associated with an increased risk of psychotic outcomes, and confirms a dose-response relationship between the level of use and the risk of later psychosis. High-potency cannabis and synthetic cannabinoids carry the greatest risk. Experimental administration of tetrahydrocannabinol, the active ingredient of cannabis, induces transient psychosis in normal subjects, but this effect can be ameliorated by co-administration of cannabidiol. This latter is a constituent of traditional hashish, but is largely absent from modern high-potency forms of cannabis. Argument continues over the extent to which genetic predisposition is correlated to, or interacts with, cannabis use, and what proportion of psychosis could be prevented by minimizing heavy use. As yet, there is not convincing evidence that cannabis use increases risk of other psychiatric disorders, but there are no such doubts concerning its detrimental effect on cognitive function. All of the negative aspects are magnified if use starts in early adolescence. Irrespective of whether use of cannabis is decriminalized or legalized, the evidence that it is a component cause of psychosis is now sufficient for public health messages outlining the risk, especially of regular use of high-potency cannabis and synthetic cannabinoids.
Author Quigley, Harriet
Murray, Robin M.
Quattrone, Diego
Di Forti, Marta
Englund, Amir
AuthorAffiliation 1 Institute of Psychiatry, Psychology and Neuroscience, King's College De Crespigny Park London SE5 8AF UK
AuthorAffiliation_xml – name: 1 Institute of Psychiatry, Psychology and Neuroscience, King's College De Crespigny Park London SE5 8AF UK
Author_xml – sequence: 1
  givenname: Robin M.
  surname: Murray
  fullname: Murray, Robin M.
  organization: Institute of Psychiatry, Psychology and Neuroscience, King's College
– sequence: 2
  givenname: Harriet
  surname: Quigley
  fullname: Quigley, Harriet
  organization: Institute of Psychiatry, Psychology and Neuroscience, King's College
– sequence: 3
  givenname: Diego
  surname: Quattrone
  fullname: Quattrone, Diego
  organization: Institute of Psychiatry, Psychology and Neuroscience, King's College
– sequence: 4
  givenname: Amir
  surname: Englund
  fullname: Englund, Amir
  organization: Institute of Psychiatry, Psychology and Neuroscience, King's College
– sequence: 5
  givenname: Marta
  surname: Di Forti
  fullname: Di Forti, Marta
  organization: Institute of Psychiatry, Psychology and Neuroscience, King's College
BackLink https://www.ncbi.nlm.nih.gov/pubmed/27717258$$D View this record in MEDLINE/PubMed
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Issue 3
Keywords cognitive function
Cannabis
early adolescence
genetic predisposition
marijuana
brain structure
psychosis
synthetic cannabinoids
Language English
License 2016 World Psychiatric Association.
cc-by-nc-nd
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Snippet Epidemiological evidence demonstrates that cannabis use is associated with an increased risk of psychotic outcomes, and confirms a dose‐response relationship...
Epidemiological evidence demonstrates that cannabis use is associated with an increased risk of psychotic outcomes, and confirms a dose-response relationship...
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SubjectTerms brain structure
Cannabis
cognitive function
early adolescence
genetic predisposition
Marijuana
Psychosis
Special
synthetic cannabinoids
Title Traditional marijuana, high‐potency cannabis and synthetic cannabinoids: increasing risk for psychosis
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