“…Department of Justice Drug Enforcement Admnistration, 2017), fentanyl and its analogs are visually indiscernible from one another, making it difficult to detect differences between them without thorough laboratory testing (Suzuki & El-Haddad, 2017). Persons who use drugs (PWUD) are often unaware when drugs are “cut”, or mixed with fentanyl (Carroll, Marshall, Rich, & Green, 2017; Macmadu, Carroll, Hadland, Green, & Marshall, 2017; Mars, Ondocsin, & Ciccarone, 2017; Spies et al, 2016; Stogner, 2014). Consequently, use of drugs containing fentanyl have been linked to sharp increases in rates of opioid morbidity and mortality (Centers for Disease Control & Prevention, 2017; Daniulaityte et al, 2017; Katz, 2017; Marshall et al, 2017; O’Donnell, Halpin, Mattson, Goldberger, & Gladden, 2017; Rudd, Aleshire, Zibbell, & Gladden, 2016; Rudd, Seth, David, & Scholl, 2016; Slavova et al, 2017).…”