Cannabis use disorder associated with increased risk of both psychotic and nonpsychotic unipolar depression and bipolar disorder

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Jack Wilson critiques a recent Danish longitudinal study published in JAMA Psychiatry, which suggests that cannabis use disorder is independently associated with bipolar disorder and unipolar depression.

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Cannabis use and its legalisation: analysing chronic pain in US veterans using electronic health records

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In their debut blog, Grace Williamson and Daniel Leightley review a US study on chronic pain, cannabis legalisation, and cannabis use disorder in US veterans.

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Cannabis use in college: genetic predispositions less influential than social environment

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Sally Turner reviews a recent study exploring cannabis use in college, which provides useful evidence relating to how universities could promote a sense of community, belonging and support to students who use cannabis.

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Schizophrenia and cannabis use: new evidence measures risk of relapse

Over 20% of cannabis users experience a psychotic relapse within 24 months of treatment.

In her debut blog, Sally Turner considers a recent study on cannabis use and clinical outcomes in people with first-episode schizophrenia spectrum disorders over 24 months of treatment.

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How to measure cannabis use: introducing the ‘International Cannabis Toolkit’ or iCannToolkit

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Ian Hamilton looks at the new International Cannabis Toolkit (iCannToolkit) and considers why it’s so important that we have an internationally agreed and standardised measure for cannabis use.

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Drug use and oral health status

Very few studies in this review, measured or adjusted for use of other substances such as cannabis.

This review investigating the relationship between drug use (methamphetamines, heroin, opiates, cocaine, cannabis and crack) and oral health includes 10 observational studies showing a higher risk of caries.

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The global drug problem: who cares? #LxAddictions19

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Ian Hamilton shares his thoughts on the new Drug Use series published yesterday in The Lancet: The global drug problem – change but not progression.

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Can contingency management help people with psychosis give up cannabis? The CIRCLE trial

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Ian Hamilton summarises the recently published CIRCLE trial, which looks at the clinical and cost-effectiveness of contingency management for cannabis use in early psychosis.

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We know how to reduce premature deaths from co-morbid mental health and substance use problems, so why aren’t we doing anything about it?

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Ian Hamilton looks at a Swedish 42-year follow-up study, which looks at the impact that psychiatric comorbidity can have on premature death in a cohort of patients with substance use disorders.

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