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Hum Psychopharmacol. 2015 Jan;30(1):42-51. doi: 10.1002/hup.2449. Epub 2014 Nov 5.

Simultaneous co-ingestion of prescription stimulants, alcohol and other drugs: a multi-cohort national study of US adolescents.

Author information

1
Institute for Research on Women and Gender, University of Michigan, Ann Arbor, MI, USA; Substance Abuse Research Center, University of Michigan, Ann Arbor, MI, USA.

Abstract

OBJECTIVE:

To determine the past-year prevalence rates and correlates of simultaneous co-ingestion of prescription stimulants and other substances among US high school seniors.

METHODS:

Nationally representative probability samples of US high school seniors were surveyed as a part of the Monitoring the Future study. The sample consisted of five cohorts including a total of 12,431 high school seniors (modal age: 18 years) and represented a population that was 53% female.

RESULTS:

Among past-year nonmedical users of prescription stimulants (n = 835), the estimated prevalence of any past-year simultaneous co-ingestion of prescription stimulants and other substances was 64.4%. The substances most commonly co-ingested with prescription stimulants included marijuana (51.1%) and alcohol (48.4%). Nonmedical users who co-ingested prescription stimulants with other substances were more likely to report non-oral routes of administration, recreational motives and greater subjective high when using prescription stimulants than nonmedical users who did not co-ingest prescription stimulants with other substances.

CONCLUSIONS:

The majority of past-year nonmedical users of prescription stimulants reported simultaneous co-ingestion of prescription stimulants and other substances. The findings indicate that co-ingestion of prescription stimulants and other substances is a pervasive behavior among US adolescents who engage in nonmedical use of prescription stimulants and should be carefully considered in future clinical practice and research.

KEYWORDS:

adolescents; co-ingestion; polydrug use; prescription stimulants; simultaneous use

PMID:
25370816
PMCID:
PMC4362718
DOI:
10.1002/hup.2449
[Indexed for MEDLINE]
Free PMC Article

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