Cigarette and e-cigarette use trajectories and prospective prescription psychotherapeutic drug misuse among adolescents and young adults.

This study aimed to determine the potential longitudinal impact of different cigarette and e-cigarette use trajectories among people aged 10-24 on prescription drug misuse of psychotherapeutic drugs. Data came from waves 1-5 of the Population Assessment of Tobacco and Health (PATH) Study (2013-2019; n = 14,454). Group-based trajectory modeling identified groups of adolescents and young adults based on cigarette and e-cigarette use across the five waves. Weighted logistic regression models were fit to examine the association of group membership with two outcomes at all waves: 1) misuse of opioids, sedatives, and/or tranquilizers, and 2) misuse of Ritalin and/or Adderall, adjusting for background characteristics. Five trajectory groups emerged: (1) non-use (77.7 %); (2) early-onset cigarette use with reducing use (4.6 %); (3) ever-increasing e-cigarette use (6.1 %); (4) stable dual use of cigarettes and e-cigarettes (3.2 %); and (5) accelerating dual use of cigarettes and e-cigarettes (8.4 %). In comparison to the non-use group, all other groups had significantly higher odds of misuse of opioids, tranquilizers, and/or sedatives and all but the early-onset cigarette use with reducing use group had significantly higher odds of misuse of Ritalin and/or Adderall by the end of wave 5. Patterns of cigarette and e-cigarette use in adolescent and young adult populations may serve as important indicators for concurrent and prospective prescription psychotherapeutic drug misuse. Findings highlight the need for cigarette and e-cigarette use prevention, harm reduction, and/or cessation efforts among adolescents and young adults.

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Declaration of Competing Interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.