“…The knowledge and expansion of these services allow for increased communication between PWUD, who are often isolated due to criminalization and stigma toward illicit drug use (Friedman et al, 2007;Muncan et al, 2020). Several harm reduction initiatives have been developed to address overdose and fentanyl monitoring at the street level such as an expansion of naloxone access and the installation of overdose prevention vending machines (ABC 7 Eyewitness News, 2023;Crumpler, 2022;Mulvhill, 2023; New York State Office of Addiction Services and Supports, 2023), the implementation of overdose prevention centers (OnPoint NYC, 2021), the decriminalization of drug use (Heano, 2023;Kary, 2023;Westervelt, 2021), and the installation of drug testing centers (Barratt & Measham, 2022;Gozdzialski et al, 2023;Larnder et al, 2021;Wallace et al, 2020Wallace et al, , 2021Wallace et al, , 2022. Given the number of harm reduction-related policies and initiatives, it is surprising that only a small number of research articles have examined drug testing and monitoring on DNMs to inform public health policy (Caudevilla et al, 2016;Giné et al, 2017;Quintana et al, 2017;Van Der Gouwe et al, 2017).…”