Harm reduction in the fourth wave of the opioid epidemic: A case series investigation of the effectiveness of definitive vs presumptive urine drug testing for opioid use disorder with co-occurring polysubstance use.  Cales RH, Bishop CL, Hueck…

"I wasn't scared of the dope I had anymore because I could test it myself:" A qualitative study among rural Appalachians who use drugs about experiences with a fentanyl test strip intervention.  Fadanelli M, Jahangir T, Kesich Z, Lane K, Young…

Analytical performance and visual evaluation of fentanyl and xylazine test strips.  Wu AHB, Ong CM, Alamillo M, Farias S, Barbosa L.  Harm Reduct J. 2026 Feb 20. doi: 10.1186/s12954-026-01415-z. Epub ahead of print. PMID: 41721315. http…

Development and validation of a fentanyl quantification model for drug checking services.  Tobias S, Guzman SM, Hein JE, Ti L.  Drug Alcohol Depend Rep. 2026 Feb 4;18:100415. doi: 10.1016/j.dadr.2026.100415. PMID: 41704559; PMCID: PMC129…

USA. Fentanyl Free America: Protect – Prevent – Support DEA – Drug Enforcement Administration, USA, aufgerufen am 03.04.2026) https://www.dea.gov/fentanylfree/protect

Drug Overdose Deaths in the United States, 2023-2024.  Garnett MF, Miniño AM.  NCHS Data Brief. 2026 Jan;(549):10.15620/cdc/174639. doi: 10.15620/cdc/174639. PMID: 41770984; PMCID: PMC12969052. https://pmc.ncbi.nlm.nih.gov/articles…