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 Student's vape had fentanyl in it, Tennessee sheriff says Charlotte Observer Police in Rio Grande Valley warn of fentanyl laced vape cartridges posing overdose risk to teens