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Updated: Mar 24, 2026

High-throughput and Comprehensive Drug Surveillance Using Multisegment Injection-Capillary Electrophoresis-Mass Spectrometry
Published on: April 23, 2019
A Longitudinal Study of Multiple Drug Use and Overdose Among Young People Who Inject Drugs
Elise D Riley1, Jennifer L Evans1, Judith A Hahn1
1Elise D. Riley and Paula J. Lum are with the Department of Medicine, University of California, San Francisco. Jennifer L. Evans and Alya Briceno are with the Department of Epidemiology and Biostatistics, University of California, San Francisco. Judith A. Hahn is with the Departments of Medicine and Epidemiology and Biostatistics, University of California, San Francisco. Peter J. Davidson is with the Department of Medicine, University of California, San Diego. Kimberly Page is with the Division of Epidemiology, Biostatistics and Preventive Medicine, Department of Internal Medicine, University of New Mexico Health Sciences Center, Albuquerque.
Objectives:
To determine the association between multiple drug use and nonfatal overdose among young people (younger than 30 years) who inject drugs.
Methods:
We completed a longitudinal study of 173 injection drug users younger than 30 years living in San Francisco, California, between April 2012 and February 2014.
Results:
The odds of nonfatal overdose increased significantly as heroin and benzodiazepine pill-taking days increased and when alcohol consumption exceeded 10 drinks per day compared with 0 drinks per day.
Conclusions:
Heroin, benzodiazepine, and alcohol use were independently associated with nonfatal overdose over time among young people who inject drugs. Efforts to address multiple central nervous system depressant use remain an important component of a comprehensive approach to overdose, particularly among young people.
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