Operation Vape Trail' cracks down on synthetic marijuana, 7 OH, kratom, more 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. Feds call for crackdown on 7 OH products, widely available across San Diego County Michigan Poison & Drug Information Center You CAN walk into a gas station or smoke shop in Michigan and buy a drug called Seven Hydroxy (7 OH), or 7 Hydroxymitragynine (7 OH MTG) Instagram 7 Oh Vape Buy BUDDY 7 OH MITRAGYNINE 110MG VAPE Rising Wholesale Inc