Fentanyl Found in Vapes What to Know 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 WATCH Fentanyl laced vape pens among teens concern after Tennessee high school incident Coxsackie Athens School District warns of fentanyl laced vapes after student collapse Student's vape had fentanyl in it, Tennessee sheriff says Charlotte Observer