Opioids more potent than fentanyl found in wastewater at MO schools, 4 in KC area Vaping & Opioid Use Disorder: Is There a Connection? Vape pens laced with fentanyl, MDMA confiscated from Douglas High School 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