Poison control calls from kratom use on the rise in PA Spotlight PA Parents: Have You Heard of 7 OH? A new substance called 7 OH (7 Hydroxymitragynine) is starting to appear in gas stations, vape shops, and online stores, and many people don't realize the risks. 7 O'Heaven 7 OH Kratom Vape Pen Smooth, Flavorful Relief Great CBD Shop 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. CATEGORIES 7 oh disposable vape