Drug supply measures and drug overdose mortality in the era of fentanyl and stimulants

Manuel Cano; Patricia Timmons; Madeline Hooten; Kaylin Sweeney

doi:10.1016/j.dadr.2023.100197

Drug supply measures and drug overdose mortality in the era of fentanyl and stimulants

Drug Alcohol Depend Rep. 2023 Oct 26:9:100197. doi: 10.1016/j.dadr.2023.100197. eCollection 2023 Dec.

Authors

Manuel Cano¹, Patricia Timmons², Madeline Hooten², Kaylin Sweeney²

Affiliations

¹ School of Social Work, Arizona State University, 411N, Central Ave Suite 863, Phoenix, AZ 85004, USA.
² College of Health Solutions, Arizona State University, USA.

Abstract

Background: Illicitly-manufactured fentanyl and stimulants have replaced prescription opioids as the primary contributors to fatal overdoses in the United States (US), yet the street supply of these substances is challenging to quantify. Building on the foundation of prior research on law enforcement drug reports, the present study compares publicly available forensic laboratory drug report measures to identify which measures account for the most variation in drug overdose mortality between states, within states over time, and in various demographic groups.

Methods: Drug reports from the National Forensic Laboratory Information System and drug overdose mortality rates from the Centers for Disease Control and Prevention were examined for all US states and the District of Columbia, 2013-2021 (459 state-years). State- and year- fixed effects models regressed drug overdose mortality rates (in the overall population and subpopulations by sex, age, and race/ethnicity) on various drug report measures, including rates per population and proportional shares of drug reports positive for fentanyl/fentanyl-related compounds, heroin, cocaine, methamphetamine, and xylazine.

Results: For drug overdose death rates in the overall population and nearly all subpopulations examined by sex, race/ethnicity, and age, the model including all drug report proportional measures represented the best-performing model (as identified via the lowest Akaike Information Criterion and highest within R-squared value), followed by the model including only the fentanyl/fentanyl-related compounds proportion.

Conclusions: Findings support the utility of publicly available drug report composition measures, particularly the proportion of fentanyl/fentanyl-related compounds, as predictors of drug overdose mortality in the US and in various subpopulations.

Keywords: Carfentanil; Cocaine; Drug overdose mortality; Fentanyl; Heroin; Law enforcement drug seizures; Methamphetamine; National forensic laboratory information system; Xylazine.