General Why Isotonitazene Is Not Yet the “New Fentanyl” In the span of about a year, isotonitazene, a novel psychoactive substance (NPS), went from being practically unheard of to being implicated in a fatal overdose spike in the Midwest. While some researchers and media reports are warning about the emergence of the designer drug, one harm reductionist from the region cautions against singling it out. The […] Written by Staff Writer June 2, 2020October 11, 2021