House appropriators used a Tuesday (April 17) hearing on FDA’s fiscal 2019 budget request to delve into the agency's approach toward tobacco -- leading FDA Commissioner Scott Gottlieb to promise “very vigorous enforcement action” on youth use of vapor products in coming weeks. The commissioner also indicated the agency would be sending to the White House within two months a much-anticipated rule addressing substantial equivalence of tobacco products to predicate products on the market in 2007. Committee members were divided...