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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Adolescent cannabis use and risk of depression and suicide

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Benjamin Janaway blogs about a major data analysis that links adolescent cannabis use with increased risk of depression and suicide. He considers the opportunities for early recognition of cannabis use and public intervention.

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Daily skunk cannabis use associated with a 5-fold increase in psychosis risk

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Luke Sheridan-Reins explores a recent paper on the contribution of cannabis use to variation in the incidence of psychotic disorder across Europe.

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Cannabis use in the developing brain: evidence from a recent cross-sectional meta-analysis

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Joe Barnby considers the findings of a recent meta-analysis of cross-sectional observational data, which explores the association of cannabis with cognitive functioning in adolescents and young adults.

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What can genetics tell us about the link between cannabis and schizophrenia? #MHQT

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Suzi Gage summarises a recent GWAS of lifetime cannabis use, which reveals new risk loci, genetic overlap with psychiatric traits, and a causal influence of schizophrenia. Interesting new evidence ahead of our Mental Health Question Time #MHQT event in London tomorrow.

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