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 Nitazene found in wastewater at 5 St. Louis area schools Missouri health officials warn nitazenes, potent synthetic opioids, are hard to detect Explainer: nitazenes and xylazine a cause for concern News Chemistry World RACGP GPs warned amid 'worrying spike' in nitazenes