Trends in Alcohol, Cigarette, E-Cigarette, and Nonprescribed Pain Reliever Use Among Young Adults in Washington State After Legalization of Nonmedical Cannabis



      Liberalization of cannabis laws may be accompanied by changes in the use of substances other than cannabis and changes in associations of cannabis use with other types of substance use. This study assessed (1) trends in alcohol, nicotine, and nonprescribed pain reliever use and (2) changes in associations of cannabis use with these other substances among young adults in Washington State after nonmedical cannabis legalization.


      Regression models stratified by age (18–20 vs. 21–25) were used to analyze six annual waves of cross-sectional survey data from a statewide sample from 2014 through 2019 (N = 12,694).


      Prevalence of past-month alcohol use, heavy episodic drinking (HED), and cigarette use and prevalence of past-year pain reliever misuse decreased, while the prevalence of past-month e-cigarette use increased since 2016 (the first year assessed). Across years and age groups, the prevalence of substance use other than cannabis was higher among occasional and frequent cannabis users compared to cannabis nonusers. However, associations between both occasional (119 days in the prior month) and frequent (20+ days) cannabis use and pain reliever misuse and between frequent cannabis use and HED weakened over time among individuals ages 21–25.


      Contrary to concerns about spillover effects, implementation of legalized nonmedical cannabis coincided with decreases in alcohol and cigarette use and pain reliever misuse. The weakening association of cannabis use with the use of other substances among individuals ages 21–25 requires further research but may suggest increased importance of cannabis-specific prevention and treatment efforts.


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      Linked Article

      • The Prevention of Nonmedical Marijuana Use Must Extend Past Adolescence
        Journal of Adolescent HealthVol. 71Issue 1
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          Concerns about the normalization of marijuana use among youth are growing as liberalization of state drug laws becomes more prevalent. Although the available research on the effects of the legalization of nonmedical (“recreational” or “adult”) marijuana use on young people is still in its early stages, most published studies focus on changes in marijuana risk perceptions [1], initiation [2], use [3], and consequences [4,5] among adolescents. This focus is reasonable since adolescence is a stage of development when the human brain undergoes dramatic change and is highly vulnerable to the lures and consequences of any type of addictive substance, including marijuana [6–8].
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