Note: Press announcements from 2004 to 2015 are available through the FDA.gov Archive. Some links in press announcements may no longer be active. For more information, contact FDA’s Office of. Get an overview of FDA regulation of vapes, e-cigarettes, and other electronic nicotine delivery systems. You can also find statistics about current use. The U.S. Food and Drug Administration sent letters on Tuesday to four cannabis companies, warning them against making medical claims about cannabidiol (CBD). The FDA hit United Exchange Corp. with a warning letter, citing the company for a number of “significant” violations with its quality-control systems. The FDA held another media briefing on electronic cigarettes yesterday to inform the world that it sent letters to 5 electronic cigarette vendors warning them that they are in violation of the U.S. Federal Food, Drug and Cosmetic Act (FDCA).