Which US E Cigarette Brands Have Received Full PMTA Approval From The FDA? Vape and Wheeze: E cigarette Users Develop Respiratory Symptoms Respiratory Therapy The FDA's new e cig regulations respond to an epidemic that doesn't really exist. A Closer Look at the 34 FDA Authorized E Cigarettes FDA ban on certain flavored e cigarettes 'doesn't appear to be working' E cigarette Characteristics, Safety Issues, & Regulation Britannica