Identification and Characterization of the Designer Opioid N-Pyrrolidino Fluetonitazene in Nasal Spray.

Picht F, Cepus V, Hohlfeld R, Klingbeil J, Weber M.

Drug Test Anal. 2026 Jul;18(7):802-810. doi: 10.1002/dta.70074. Epub 2026 Apr 15. PMID: 41983957; PMCID: PMC13327161.