PARENT ALERT: What is 7 OH and Why Should You Be Concerned? A substance called 7 OH is raising alarms among local experts and parents. 7 OH refers to 7 hydroxy mitragynine, a highly potent chemical FDA Pushes to Classify 7 OH Sold in Vape Shops as Illicit Drug Ecigator DeWine Wants to Ban Sales of Synthetic Kratom in Ohio Cleveland Scene Kentucky taking steps to keep 7 OH products off store shelves 7 O'Heaven 7 OH Kratom Vape Pen