Swipe through to learn about 7 OH (7 hydroxymitragynine), a potent psychoactive compound found in the Kratom plant. As we move past the peaks of RX pills and fentanyl, 7 OH is emerging as a The dangerous rise and potential fall of kratom's opioid extract City Pulse 7 O'Heaven 7 OH Kratom Vape Pen Blueberry Fast & Potent Doctors are warning about a substance they call gas station heroin that is available over the counter at vape stores across Arizona. The product is called 7 OH, a component derived from kratom.