Department of Psychology, St. Francis Xavier University, 103 Annex, 2323 Notre Dame Ave., Antigonish, NS B2G 2W5, Canada.
Department of Psychology, University of Victoria, Greater Victoria, BC V8W 2Y2, Canada.
Int J Environ Res Public Health. 2021 Mar 31;18(7):3652. doi: 10.3390/ijerph18073652.
Increases in cannabis use among young people has heightened concern about the potential interactive health effects of cannabis with other drugs. We examined the longitudinal association between concurrent and simultaneous (SAM) co-use of alcohol and cannabis in young adulthood on mental health symptoms, substance use behaviors, and substance-related harms two years later. Data were drawn from Time 5 (T5; = 464; 46% male) and 6 (T6; = 478; 45% male) of the Victoria Healthy Youth Survey. At T5, 42% of participants used alcohol-only, 13% used concurrently, 41% used SAM, 1% were cannabis only users, and 3% abstained from cannabis and alcohol. Boys were more likely to use SAM. Higher T5 SAM use frequency was associated with heavier use of substances, more substance-related harms, and symptoms of psychosis and externalizing problems at T6. T5 Concurrent use was associated with conduct symptoms, illicit drug use, and alcohol use disorders at T6 relative to alcohol-only use. Cannabis is commonly used with alcohol and the findings suggest that any co-use (concurrent or simultaneous) may be problematic in young adulthood. Public health messages need to explicitly inform consumers about the possible consequences of using both alcohol and marijuana and the addictive pharmacological impact of using them together.
年轻人中大麻使用量的增加加剧了人们对大麻与其他药物潜在交互健康影响的担忧。我们研究了年轻人同时使用酒精和大麻（共时同时使用，简称 SAM）与两年后心理健康症状、物质使用行为和物质相关伤害之间的纵向关联。数据来自维多利亚健康青年调查的第 5 次（T5；n=464，46%为男性）和第 6 次（T6；n=478，45%为男性）调查。在 T5 时，42%的参与者仅使用酒精，13%的参与者同时使用，41%的参与者 SAM 共时同时使用，1%的参与者仅使用大麻，3%的参与者同时戒除了大麻和酒精。男孩更有可能 SAM 共时同时使用。更高的 T5 SAM 使用频率与 T6 时更重的物质使用、更多的物质相关伤害以及精神病和外化问题的症状有关。与仅使用酒精相比，T5 时的同时使用与行为症状、非法药物使用和酒精使用障碍有关。大麻与酒精通常同时使用，研究结果表明，任何共时同时使用（同时或同时）在年轻人中可能存在问题。公共卫生信息需要明确告知消费者使用这两种物质可能产生的后果，以及同时使用它们的成瘾性药理学影响。
