Regulations and policies regarding e-cigarettes.

Electronic cigarettes (e-cigarettes) are a growing public health concern because of a dramatic increase in use by adolescents and the uncertainty of potential health impacts. These health concerns and lack of an established federal regulatory scheme have led many local and state governments to address the regulatory void for e-cigarettes by incorporating them into the statutory definition of tobacco or by passing laws specific to the use of e-cigarettes. In August 2016, the US Food and Drug Administration issued a final rule deeming e-cigarettes within their authority; providing uniform requirements like premarket approval applications, Harmful and Potentially Harmful Constituents reporting, and warning labels; and establishing 18 years as a minimum age of purchase. Although the impact on the public's health remains uncertain, regulations and laws governing e-cigarettes continue to develop. This review highlights the available data regarding safety and public health impacts of e-cigarettes and details the status of US regulations and policies affecting their sale and use. Cancer 2017;123:3007-14.