Alcohol use confounds the relationship between cannabis use and conversion to psychosis

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Kathryn Walsh presents a study of ‘high risk’ young people, which found that cannabis abuse or dependence significantly increased the risk of conversion to psychosis. The research also found that alcohol use weakened the relationship between cannabis use and conversion to psychosis.

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High potency cannabis and the risk of psychosis

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Eleanor Kennedy writes her debut blog on a recent case-control study of people in South London, which explores the links between first-episode psychosis and the use of high potency cannabis (skunk).

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Pharmacotherapies for reducing cannabis dependence

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Kathryn Walsh reports on a recent Cochrane systematic review of pharmacotherapies for cannabis dependence, which concludes that there is a lack of evidence for all medications reviewed.

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Impaired inhibitory control in addiction

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Maartje Luijten, Assistant Professor at the Behavioural Science Institute at Radboud University, writes her debut blog on a recent meta-analysis of deficits in behavioural inhibition in substance abuse and addiction.

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Cannabis and mania: what’s the link?

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Kathryn Walsh summarises a systematic review which finds that cannabis use may exacerbate symptoms of mania in those with a diagnosis of bipolar disorder, and trigger symptoms of mania in the general population.

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Cannabis use in young people linked with lower high school completion and degree attainment

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André Tomlin and Douglas Badenoch voice a note of caution about the Lancet Psychiatry meta-analysis of cannabis use in young people. The study links cannabis use in children with low educational attainment, cannabis dependence, illicit drug use and suicide attempts in later life.

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Internet-based alcohol and cannabis prevention: Climate Schools and salami slicing

Matt Field summarises the findings of a recent cluster RCT that uses internet-based prevention (an Australian programme called Climate Schools) to reduce alcohol and cannabis use, truancy, psychological distress and moral disengagement.

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Childhood abuse and adverse life events interact synergistically to produce a high risk for psychotic experiences

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This recent study concludes that childhood abuse creates an enduring vulnerability to psychosis that is realised in the event of exposure to further stressors and risk factors, such as separation, bereavement, or being involved in an accident or physical attack.

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NICE evidence update: Interventions to reduce substance misuse among vulnerable young people

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The National Institute for Health and Care Excellence (NICE) have recently searched for any new evidence that may be relevant to a public health guideline published in 2007; ‘Interventions to reduce substance misuse among vulnerable young people’. In this blog I summarise the new evidence that has emerged and highlight whether or not it is likely [read the full story…]

Cannabis, cigarette smoking and psychosis: do we need a rethink?

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The relationship between cannabis and psychosis has been one of the hottest topics in psychiatry over the last decade, and with good reason. Policy-makers still disagree on whether cannabis should be legalised or how it should be classified, with Uruguay being the most recent country to legalise it. Drawing broadly from work initiated by Robin [read the full story…]