The supply of high potency opioids is expanding through products sold legally as herbal supplements in gas stations, vape shops, and convenience stores. The most prominent is 7 hydroxymitragynine, also known as 7 OH. I Smoked an "Opioid Vape" Scientists say it's stronger than morphine. It's on sale over the counter. What is 7 OH? Understanding the Banned Kratom Compound Still Detox Stack'd 7 Hydroxymitragynine Vape 2g Delta 8 Resellers How Kratom and 7 OH, Formerly Known as Gas Station Heroin, Went Mainstream GQ