LOS ANGELES—Faced with a proliferation of new electronic cigarettes and a sharp rise in teen vaping, the U.S. Food and Drug Administration sent letters to 21 electronic cigarette manufacturers on Oct. 12, seeking information to assess whether the products are being marketed illegally.
An FDA rule banned the sale of new e-cigarette products after August 2016 without regulatory approval. In September, Reuters reported that startups and big tobacco firms launched more than a dozen new high-nicotine e-cigarette products mimicking the popular Juul devices after the FDA imposed the deadline.
