Related Experiment Video
Updated: Jun 12, 2026

Brain Morphology of Cannabis Users With or Without Psychosis: A Pilot MRI Study
Published on: August 18, 2020
Cannabis use correlates of syringe sharing among injection drug users
Didier Jutras-Aswad1, Geng Zang, Julie Bruneau
1CRCHUM, Centre Hospitalier de l'Université de Montréal, Québec, Canada.
Abstract:
This study examines whether the relation between acute cannabis use and syringe sharing during single injection days is similar among regular and nonregular users, participating in a cohort study of injection drug users in Montréal, Canada. 236 (36.6%) subjects were classified as regular cannabis users (RCUs), 227 (35.2%) as nonregular cannabis users (NRCUs), and 181 (28.1%) were abstinent. Cannabis use during a single injection day was associated with a fivefold increased risk of sharing (OR 4.92; 1.83-13.22) in NRCUs compared to RCUs. Our results indicate that cannabis use history should be considered when evaluating its potential effect on risk-taking behaviors.
Related Concept Videos
Drug Accumulation During Multiple Dosing: Repetitive IV Injections
Amebiasis
Combined Effects of Drugs: Synergism
Such synergistic combinations...
Drug Dependence
Chemotherapy-Induced Nausea and Vomiting: Cannabinoids
Two synthetic agonists of THC,...
CNS Stimulants: Cocaine, Amphetamines and Cannabinoids

