State warns of nitazene, a new highly potent opioid found in Missouri KBIA Explainer: nitazenes and xylazine a cause for concern News Chemistry World News: April 2025 Increasing range of drugs and new psychoactive substances found in vaping products More than 1200 vape vials laced with nitazene, a synthetic opioid 200 times more potent than morphine, were sold across Sydney, sparking Australia's first arrest over vapes spiked with the drug. Police Synthesis, Chemical Characterization, and Opioid Receptor Activity Assessment of the Emerging Group of Nitazene 2 Benzylbenzimidazole Synthetic Opioids ACS Chemical Neuroscience