People are dying': rise of nitazenes should be treated as pandemic, injecting centre head says Opioids The Guardian Clinical Experiences With the Nitazene Class of Synthetic Opioids: A Cohort Study Annals of Emergency Medicine Synthesis, Chemical Characterization, and Opioid Receptor Activity Assessment of the Emerging Group of Nitazene 2 Benzylbenzimidazole Synthetic Opioids ACS Chemical Neuroscience Police uncover opioid laced vapes in Australian first bust 9 News Australia