Will Vaping Lead Teens to Smoking Cigarettes? Johns Hopkins Medicine Locations In Mass. Take Vapes, Drugs As Part Of 'National Prescription Drug Take Back Day' WBUR News 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 Pills, powders and vapes may look legit But some may contain synthetic opioids like Nitazenes or Fentanyl It's all a deadly gamble.