Prevalence of Fentanyl in Methamphetamine and Cocaine Samples Collected by Community-based Drug Checking Services

Using data from 77 harm reduction programs in 25 US states, researchers found that 12-15% of powder methamphetamine and powder cocaine also contained fentanyl although the prevalence varied geographically. Prevalence of fentanyl in crystal methamphetamine and crack cocaine was lower. Heroin and xylazine were also found in unregulated stimulants. Xylazine reduced the ability to detect fentanyl.