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. Vape Pen FDA Warns About 7 OH: What Vapers Need To Know Australia Euphoria Kratom Vape 7 O'Heaven 7 OH Kratom Vape Pen STACK'd 7 hydroxymitragynine VAPE 200mg Per Device (Active 7 OH) Milligrams Per Puff 0.5 Third Party Lab Tested Advanced ceramic coil & low heat tech No buttons or settings JUST SMOKE Updated May 2026 68 Photos 2529 E 5th St, Tyler, Texas Vape Shops Phone Number Yelp