Citation

Manthey J, Carr S, Rehm J. Drug Alcohol Depend. 2019; ePub(ePub): ePub.

Affiliation

Institute of Clinical Psychology and Psychotherapy, Technische Universität Dresden, Dresden, Germany; Centre for Interdisciplinary Addiction Research, UKE Hamburg-Eppendorf, Hamburg, Germany; Institute for Mental Health Policy Research and Campbell Family Mental Health Institute, Centre for Addiction and Mental Health, 33 Russell Street, Toronto, M5S 2S1, Ontario, Canada; Dalla Lana School of Public Health and Department of Psychiatry, University of Toronto, 155 College Street, 6th Floor, Toronto, M5T 3M7, Ontario, Canada; Department of International Health Projects, Institute for Leadership and Health Management, I.M. Sechenov First Moscow State Medical University, Trubetskaya Str., 8, B. 2, Moscow, 119992, Russian Federation.

Copyright

(Copyright © 2019, Elsevier Publishing)

DOI

10.1016/j.drugalcdep.2019.107731

PMID

31761475

Abstract

Using Canadian survey data, Callaghan and colleagues examined the distribution of cannabis quantities after converting reported quantities of different cannabis products into standard joint equivalents. We argue that the assumed amount of 0.5 g dried cannabis flowers unlikely represents a usual dose in average consumers. Moreover, some conversion factors are implausible with regard to the THC concentration levels in select products. As with standard drinks, standard joint equivalents should be consistent with potency, i.e. THC concentration, and should be lower than suggested by the authors.

Copyright © 2019. Published by Elsevier B.V.

Language: en

Keywords

Canada; Cannabis; Marijuana; Standard joint; Survey