Fentanyl is used in Mexico's northern border: current challenges for drug health policies.
Clara FleizJaime ArredondoAlfonso ChavezLilia PachecoLuis A SegoviaJorge A VillatoroSilvia L CruzMaría E Medina-MoraJuan R de la FuentePublished in: Addiction (Abingdon, England) (2020)
In a sample of 89 heroin users in Mexico, most white powder heroin users were unknowingly exposed to fentanyl, with fentanyl detected in 93% of white powder samples.