FDA Pushes to Classify 7 OH Sold in Vape Shops as Illicit Drug Ecigator Vape Shops Are Selling 7 OH: The Dangers Behind the Counter California Takes On Potent Synthetic Drug 7 OH KQED 7 Oh Mitragynine Vape What is 7 OH? 7 OH stands for 7 Hydroxymitragynine. It is a strong chemical found in very small amounts in the kratom plant. Some products sold in stores have much 7 Hydroxymitragynin Extrakt Buy 7 O'Heaven 7 OH Kratom Vape Pen Australia Euphoria Kratom Today, we announced the issuance of seven warning letters to companies illegally marketing products containing 7 hydroxymitragynine (7 OH). https: www.fda.gov news events press announcements fda issues warning letters firms marketing products