Fentanyl in Vapes: Is It Real, How to Tell & What the Risks Are THC Vaping & Nicotine: Risks for Teens & Young Adults 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 Primary care physicians are hesitant to accept chronic pain patients using opioids or cannabis Michigan Medicine