The Food and Drug Administration is considering banning companies from selling e-cigarettes online to reduce the prevalence of vaping among teens.

"That's going to be one thing that's on the table," FDA Commissioner Scott Gottlieb said at an Axios event Tuesday about the possibility of online sales. "It's very clearly something we are now looking at."

The FDA will be putting out proposals in November for regulating e-cigarettes, and will allow several months for feedback before a final decision is issued. Agency officials have asked vaping companies to put out their own proposals about how to reduce the use of their devices among teens.

In addition to banning online sales, the FDA also is considering banning flavored e-cigarettes from being sold to anyone. Gottlieb said that he did not want to see teens develop a dependency on nicotine that would last their whole lives, or to see them transition to traditional cigarettes. The main factors driving teen use, he said, were "access and appeal."

[Opinion: Banning flavored e-cigarettes could blow up in the FDA's face]

An e-cigarette heats up a liquid, often containing nicotine, into a vapor that is inhaled by the user. The products often come in multiple flavors intended to mimic fruits or desserts, leading to charges from critics that they are intended to be appealing to children. Data shows that teen vaping has increased 900 percent in recent years, but smoking traditional cigarettes has hit record lows.

Gottlieb allowed that the conversation on regulations would be different if the data showed that fewer teens were vaping, but that instead, "everything is moving in the wrong direction."

Gregory Conley, president of the American Vaping Association, earlier during the Axios event pushed back on the proposal to ban flavors, saying that they provide a tastier alternative to traditional cigarettes and help adults quit.

The FDA during the past year has offered e-cigarette companies the opportunity to submit applications to have their products approved as options for smokers that are less risky than traditional cigarettes. FDA approval could even lead to the products receiving a label that they are effective at helping smokers quit.

If FDA officials aren't satisfied with responses about how vaping companies will be more proactive in restricting teen use, they could move up the date that companies would be required to submit their products to the agency for review. Gottlieb had previously moved back the Obama administration deadline that would have begun review of the products this year.