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. 7 Oh Hydroxymitragynine Vape PSA: Don't fall for the "natural" hype. We need to talk about 7 OH (7 hydroxymitragynine), a potent psychoactive compound being sold in gummies, candies and liquid shots 7 O'Heaven 7 OH Vape Pen , Shop Now At PaylessKratom.com 7 hydroxymitragynine Vape 7 Hydroxy Kratom Vapes 7 Oh Mitragynine Vape Our team has removed 17,311 packages of isolated and or concentrated 7