Correct me if I'm wrong but wouldn't the FDA then lay claim to regulate nicotine not derived from tobacco as a pharmaceutical?
Here's mention of it in the deeming. It's not entirely clear in their response but it appears that the "catch all phrase" - "subject to FDA's tobacco control authorities, if they are an assembly of materials intended or reasonably expected to be used with or for the human consumption of a tobacco product"
And here you have to understand what is meant by "tobacco product" in FDA language - any component part used in the human consumption - ie drip tips, clearos, tanks, wire, etc. etc.
(Comment 164) Some comments sought clarification as to FDA's authority over e-liquids
that do not contain nicotine or other chemicals derived from tobacco plants and those e-liquids
that contain nicotine derived from a nontobacco source (e.g., eggplants or tomatoes). Others
claimed that FDA does not have regulatory authority over e-cigarettes that are refillable and do
not contain nicotine, but does have authority over e-liquids if the liquid contains nicotine. Yet,
some said that e-liquids used in e-cigarettes should have an entirely new classification, because
use of the words "tobacco product" in marketing materials would cause undue confusion for
consumers.
pg257
(Response) As stated in section 201(rr) of the FD&C Act, the definition of "tobacco
product" includes any product made or derived from tobacco, including any component, part, or
accessory of a tobacco product. An e-liquid made or derived from tobacco meets this definition
and, therefore, is subject to FDA's chapter IX authorities.
E-liquids that do not contain nicotine
or other substances derived from tobacco may still be components or parts and, therefore, subject
to FDA's tobacco control authorities, if they are an assembly of materials intended or reasonably
expected to be used with or for the human consumption of a tobacco product and do not meet the
definition of accessory.