Vape Pen FDA Warns About 7 OH: What Vapers Need To Know Australia Euphoria Kratom Vape Kratom derived opioid 7 OH found in gas stations, vape shops DISA Global Solutions, Inc. posted on the topic LinkedIn 7oh Gummies 7 O'Heaven 7 OH Kratom Vape Pen 7 Hydroxymitragynine Vape Vape Pen FDA Warns About 7 OH: What Vapers Need To Know Australia Euphoria Kratom Vape 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.