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Re:Feds announce final e-cigarette rule that nearly bans them by Dylan16807 on Thursday May 05, 2016 @09:18PM (#11641026)
In general, vaping fluid is a couple basic ingredients plus flavors. The basic ingredients should go through drug-level safety testing if they haven't already gone through it. But each recipe on top of that? Very similar to new food recipes.
Re:Feds announce final e-cigarette rule that nearly bans them by athenot on Thursday May 05, 2016 @10:20PM (#11641249)
Or similar to drug combos, which must be certified as such.

Even if the individual drugs have their own certification, mixing them and packaging them together requires a new certification. Now of course, the new cert will rely heavily on the existing docs, so it's not like everything has to be re-proved again, but the interaction & effects thereof are scrutinized a bit more heavily.

Re:Feds announce final e-cigarette rule that nearly bans them by Dylan16807 on Friday May 06, 2016 @12:50PM (#11645136)
It's not mixing and matching drugs. It's taking one single drug and adding flavors. The inactive ingredients do not need the same scrutiny as active ones.