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Objective: Cannabis has become more available in Canada since its legalization in 2018. Many individuals who use cannabis also use alcohol (co-use), which can be used either at the same time such that their effects overlap (simultaneous use) or at different times (concurrent use). Though studies have identified predictors of co-use relative to single-substance use, less is known about the predictors of specific types of co-use. The present study examined the mental health and dispositional predictors of simultaneous relative to concurrent use of the two legal substances (cannabis and alcohol) among adults in Canada.
Method: Canadian adults reporting past-year use of both cannabis and alcohol ( = 1,761) were recruited from Academic Prolific and six Canadian universities. Participants completed online self-report measures of demographic characteristics, cannabis and alcohol co-use, mental health symptoms, impulsivity, and personality traits.
Results: Binary logistic regression analyses revealed that when independent variables were each examined individually, greater severity of depression, anxiety, PTSD, and ADHD symptoms; greater negative urgency and lack of premeditation; and greater impulsivity each predicted an increased likelihood of reporting past-year simultaneous use relative to concurrent use. When independent variables were grouped into three separate models (mental health, impulsivity, and personality variables), greater anxiety symptom severity, ADHD symptom severity, negative urgency, and sensation seeking were each uniquely associated with an increased likelihood of simultaneous relative to concurrent use.
Conclusions: Individuals with elevated anxiety and ADHD symptoms, as well as negative urgency and sensation seeking, may be more inclined to engage in simultaneous use to self-medicate and achieve greater symptom reduction. Future studies may examine the directionality of these relations and motives (e.g., coping) that may differentiate simultaneous and concurrent use.
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http://dx.doi.org/10.26828/cannabis/2024/000256 | DOI Listing |
J Stud Alcohol Drugs
September 2025
National Center for Injury Prevention and Control, Centers for Disease Control and Prevention, Atlanta, GA, USA.
Background: Historically, cannabis use and cannabis use disorder (CUD) have been more prevalent among males. However, emerging evidence suggests cannabis use may be increasing faster among females in younger age groups. This study characterized changes in female versus male differences in cannabis use and CUD across age groups and time.
View Article and Find Full Text PDFCurr Addict Rep
December 2025
Syracuse University Department of Psychology, 352 Marley Educational Building, Syracuse, NY 13244.
Purpose Of Review: This paper aimed to estimate pooled bi-directional associations between multidimensional sleep health and substance use among youth and investigate whether these associations differed as a function of race/ethnicity.
Recent Findings: Empirical observational studies providing quantitative data on the association of sleep health (duration [sleep obtained per 24 hours], satisfaction [subjective assessment of sleep], alertness [ability to maintain attentive wakefulness], and timing [placement of sleep]) and substance use (i.e.
Indian J Psychiatry
August 2025
Department of Community Medicine, Kasturba Medical College, Manipal, Manipal Academy of Higher Education, Manipal, Karnataka, India.
Background: Illicit substance use is a major social issue affecting youth worldwide. Early identification of its drivers is essential to implement effective interventions and protect youth from its harmful consequences.
Aim: To examine patterns and risk factors of illicit substance use among young adults and explore perceptions of students and teachers on the issue.
Drug Alcohol Depend Rep
September 2025
University of Illinois Chicago, Department of Psychology, United States.
Background: Cannabis use in pregnancy is increasing, despite evidence linking perinatal cannabis use (PCU) to maternal and infant health risks. To investigate factors contributing to increasing PCU, this study used qualitative interviews to examine beliefs and perceptions of PCU.
Methods: Semi-structured qualitative interviews with pre- and post-pregnancy women examined beliefs and perceived benefits and harms of PCU.
Hum Psychopharmacol
September 2025
Psychology and Neuroscience, University of Colorado Boulder, Boulder, Colorado, USA.
Objective: This study examined the effects of tetrahydrocannabinol (THC) and cannabidiol (CBD) on negative mood and drinking behaviors, and whether those effects were moderated by levels of perceived discrimination among participants who identify with a racial, ethnic, gender, or sexual identity that is underrepresented in research.
Methods: Participants were either not using cannabis, using cannabis with THC, or using cannabis with CBD and were assessed at baseline, 2 weeks, and 4-weeks following ad libitum use of a legal market cannabis product that was randomly assigned to them. Primary outcomes included scores on the Depression Anxiety Stress (DASS) Scale and number of drinking days.