Auteur M. J. BARRATT

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Are cannabis use problems comparable across individuals using for recreational and medical purposes? An international cross-sectional study of individuals who use self-grown cannabis

S. R. SZNITMAN ; G. R. POTTER ; J. GRIGG ; A. GRANVILLE ; P. HAKKARAINEN ; T. DECORTE ; S. LENTON ; D. FORTIN ; D. BEAR ; I. KIRTADZE ; M. JAUFFRET-ROUSTIDE ; M. J. BARRATT ; E. L. SEVIGNY | 2025
Dans International Journal of Drug Policy (Vol.144 Part 3, October 2025) Article : Périodique

Background: Little is known about cannabis use problems among individuals who use cannabis for medical purposes and whether rates and determinants of cannabis use problems in medical users differ to those observed among individuals using for rec[...]

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Attitudes of cannabis growers to regulation of cannabis cultivation under a non-prohibition cannabis model

S. LENTON ; V. A. FRANK ; M. J. BARRATT ; H. V. DAHL ; G. R. POTTER | 2015
Dans International Journal of Drug Policy (Vol.26, n°3, March 2015) Article : Périodique

Background: How cannabis cultivation is dealt with under various examples of cannabis legalization or regulation is an important consideration in design of such schemes. This study aimed to (i) investigate support among current or recent cannabi[...]

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'Choice' of social media platform or encrypted messaging app to buy and sell illegal drugs

R. VAN DER SANDEN ; C. WILKINS ; M. RYCHERT ; M. J. BARRATT | 2022
Dans International Journal of Drug Policy (Vol.108, October 2022) Article : Périodique

Social media is increasingly being utilized to facilitate the buying and selling of illegal drugs, particularly by young people. However, the range of social media and messaging platforms means people must make 'choices' around which platforms t[...]

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Comparison of strength and adulteration between illicit drugs obtained from cryptomarkets versus off-line

L. CONEY ; A. PEACOCK ; D. VAN DER GOUWE ; L. SMIT-RIGTER ; N. HUTTEN ; M. VENTURA ; A. QUESADA ; M. J. BARRATT | 2025
Dans Addiction (Vol.120, n°1, January 2025) Article : Périodique

BACKGROUND AND AIMS: Drugs sold on cryptomarkets are thought to have lower levels of adulteration and higher strength compared with those sourced off-line. The present study aimed to determine whether cryptomarket and off-line-sourced 3,4-methyl[...]

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Conflict and social control among cannabis growers

E. L. SEVIGNY ; G. POTTER ; C. WILKINS ; M. J. BARRATT ; T. F. SOGAARD ; P. HAKKARAINEN ; J. GRIGG ; M. JAUFFRET-ROUSTIDE | 2025
Dans International Journal of Drug Policy (Vol.144 Part 3, October 2025) Article : Périodique

Aims: Illegal drug markets are often assumed to be violent and predatory due to the absence of third-party enforcement. While cannabis markets are generally considered to be relatively more peaceful, there has been little investigation of the le[...]

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Correlates of new psychoactive substance use among a self-selected sample of nightclub attendees in the United States

J. J. PALAMAR ; M. J. BARRATT ; J. A. FERRIS ; A. R. WINSTOCK | 2016
Dans American Journal on Addictions (Vol.25, n°5, August 2016) Article : Périodique

Background and Objectives: Although new psychoactive substances (NPS) continue to emerge at a rapid rate, US national surveys only measure the use of non-specific categories of NPS and are not designed to access high-risk populations. In this pa[...]

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Distinguishing personal use of drugs from drug supply: Approaches and challenges

K. O'REILLY ; M. KOWALSKI ; M. J. BARRATT ; A. RITTER | 2022
Dans International Journal of Drug Policy (Vol.103, May 2022) Article : Périodique

The ability to fairly and justly distinguish between drug possession for personal use and drug possession for supply is a central feature of drug laws across the globe. Whether such distinctions pertain to decriminalisation of simple possession,[...]

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International Journal of Drug Policy, Vol.35 - September 2016 - Drug cryptomarkets

M. J. BARRATT, Éditeur scientifique ; J. ALDRIDGE, Éditeur scientifique | 2016
Bulletin : Périodique

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Drug use patterns, harm reduction strategies and use of drug checking services in Boom Festival patrons

H. VALENTE ; D. MARTINS ; M. PINTO ; J. L. FERNANDES ; M. J. BARRATT | 2022
Dans Drugs, Habits and Social Policy (Vol.23, n°3, 2022) Article : Périodique

Purpose: Recent studies have shown that people who attend electronic dance music events and use drug checking services (DCS) are a predominantly white male, highly educated middle-class population. However, there is still a lack of data beyond s[...]

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#Drugsforsale: An exploration of the use of social media and encrypted messaging apps to supply and access drugs

L. MOYLE ; A. CHILDS ; R. COOMBER ; M. J. BARRATT | 2019
Dans International Journal of Drug Policy (Vol.63, January 2019) Article : Périodique

Background: The use of new technology is frequently harnessed by drug suppliers to both increase profits and reduce risk. While a growing body of research has investigated drug sales through online pharmacies and cryptomarkets, despite growing m[...]

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"Etazene, safer than heroin and fentanyl": Non-fentanyl novel synthetic opioid listings on one darknet market

F. R. LAMY ; R. DANIULAITYTE ; M. J. BARRATT ; U. LOKALA ; A. SHETH ; R. G. CARLSON | 2021
Dans Drug and Alcohol Dependence (Vol.225, August 2021) Article : Périodique

Background: Novel synthetic opioids are fueling the overdose deaths epidemic in North America.Recently, non-fentanyl novel synthetic opioids have emerged in forensic toxicological results. Cryptomarkets have become important platforms of distrib[...]

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Evaluation of a drug checking service at a large scale electronic music festival in Portugal

H. VALENTE ; D. MARTINS ; H. CARVALHO ; C. V. PIRES ; M. C. CARVALHO ; M. PINTO ; M. J. BARRATT | 2019
Dans International Journal of Drug Policy (Vol.73, November 2019) Article : Périodique

Background: Drug checking services are being implemented in recreational settings across the world, however these projects are frequently accused of a lack of evidence concerning their impact on people who use drugs. This paper describes the imp[...]

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Nouveauté

Everything you always wanted to know about drug cryptomarkets* (*but were afraid to ask) [Editorial]

M. J. BARRATT ; J. ALDRIDGE | 2016
Dans International Journal of Drug Policy (Vol.35, September 2016) Article : Périodique

For some drug policy scholars, including us, the online marketplace Silk Road and its successors are inherently fascinating. When we first discovered Silk Road in 2011, on opposite sides of the globe, we could not believe it was real: people wer[...]

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Evolving and diversifying selling practices on drug cryptomarkets: An exploration of off-platform "direct dealing"

A. CHILDS ; R. COOMBER ; M. BULL ; M. J. BARRATT | 2020
Dans Journal of Drug Issues (Vol.50, n°2, April 2020) Article : Périodique

This is the first study to explore how cryptomarket actors are increasingly adopting encrypted messaging applications to "direct deal" beyond the provided platforms, to obviate the protocols of cryptomarkets, and to diversify the communication e[...]

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Examining the blurred boundaries between medical and recreational cannabis - results from an international study of small-scale cannabis cultivators

P. HAKKARAINEN ; T. DECORTE ; S. SZNITMAN ; K. KARJALAINEN ; M. J. BARRATT ; V. A. FRANK ; S. LENTON ; G. POTTER ; B. WERSE ; C. WILKINS | 2019
Dans Drugs: Education, Prevention and Policy (Vol.26, n°3, June 2019) Article : Périodique

Aim: To compare characteristics of recreational vs. medical growers in a sample of small-scale cannabis cultivators from 12 countries. Methods: Six thousand eight hundred ninety six respondents who took part in an online survey were divided int[...]

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