Simultaneous alcohol and marijuana (SAM) use is prevalent among young adult drinkers and associated with increased risk for harms. Less understood about SAM use is whether increased risk is incurred on SAM use occasions relative to occasions in which individuals used only 1 substance. From a sample of young adult SAM users, we compared occasions in which individuals simultaneously used alcohol and marijuana so that the effects overlapped ("SAM days"), occasions involving only alcohol ("alcohol days"), and occasions involving only marijuana ("marijuana days") on level of use, level of subjective intoxication, and negative and positive consequences. Eligible participants (N = 154; 57.8% female, 72.7% non-Hispanic/Latinx White) were 18-25 years old, reported past-month SAM use, and reported past 2-week binge drinking. Participants completed up to 14 daily assessments on their substance use behavior. Multilevel models indicated that, relative to alcohol days, SAM days had more negative consequences. SAM and alcohol days were not statistically different on level of use, level of subjective alcohol intoxication, or positive consequences. Relative to marijuana days, SAM days had more negative consequences and more positive consequences. Level of use (number of hits) and level of marijuana intoxication were not statistically different. In addition to SAM users being a more at-risk group, SAM occasions are associated with greater risk within this vulnerable population. Fine-grained ecological momentary assessments are needed to better understand perceptions and behavior throughout a SAM use episode. (PsycINFO Database Record (c) 2020 APA, all rights reserved).

中文翻译：

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日常生活中同时使用酒精和大麻：对使用水平，主观中毒以及积极和消极后果的影响。

同时饮酒和大麻（SAM）在年轻的成年饮酒者中很普遍，并且与伤害风险增加有关。对SAM使用的了解较少，是相对于个人仅使用一种物质的情况，在SAM使用时是否会增加风险。通过对年轻的成年SAM用户进行抽样，我们比较了个人同时使用酒精和大麻以使效果重叠的情况（“ SAM天数”），仅涉及酒精的情况（“酒精日”）和仅涉及大麻的情况（“大麻天数”）上的使用水平，主观中毒水平以及负面和正面后果。符合条件的参与者（N = 154； 57.8％的女性，72.7％的非西班牙裔/拉丁裔白人）年龄在18-25岁之间，报告了过去一个月使用SAM，并且报告了过去两周的暴饮暴食。参加者每天完成多达14次有关其药物使用行为的评估。多级模型表明，相对于饮酒天数，SAM天数具有更多的负面影响。SAM和饮酒天数在使用水平，主观酒精中毒水平或积极后果方面无统计学差异。相对于大麻日，SAM日有更多负面影响和更多正面影响。使用水平（命中数）和大麻中毒水平在统计学上没有差异。除了SAM用户成为高风险人群之外，SAM场合与该弱势群体中的更大风险相关。需要细粒度的生态瞬时评估，以更好地理解整个SAM使用情节中的感知和行为。（PsycINFO数据库记录（c）2020 APA，保留所有权利）。