Student revived after using vape unknowingly laced with fentanyl Drug laced vapes pose a serious and growing public health threat. Attractive flavours and packaging can hide dangerous substances such as ketamine, fentanyl, heroin, methamphetamine, THC and synthetic opioids. Even small amounts can Fentanyl Found in Confiscated Vape Cartridges Health Alert: nitazenes, a class of highly potent synthetic opioids, are being detected in Missouri. They are appearing in counterfeit pills, powders and vapes often without users knowing. How dangerous are they? Fentanyl laced vape pens among teens concern after Tennessee high school incident Lab finds fentanyl in spice seized from Brandon convenience store