Ban on synthetic kratom in effect in Ohio, but more action could be coming The Statehouse News Bureau LegitScript Monitoring & Certification Solutions The supply of high potency opioids is expanding through products sold legally as herbal supplements in gas stations, vape shops, and convenience stores. The most prominent is 7 hydroxymitragynine, also known as 7 OH. 7 oH vapes 7 oh kratom near me 7oh vape 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