It's a name you've probably never heard: nitazenes. These synthetic opioids are being found in counterfeit pills, powders and vapes. Nitazenes are 5 to 10 times more potent than fentanyl. Even a Clinical Experiences With the Nitazene Class of Synthetic Opioids: A Cohort Study Annals of Emergency Medicine Please explain: Why vapes laced with nitazenes are causing alarm The Lighthouse Man charged with supplying nitazene laced vape liquid in Australian first ABC News It's February. How heart smart are St. Louisans?