But see, therein lies a problem. Past information is based on smoking data, even if they say it is nicotine they were studying, it was through smoking. Nicotine is starting to be studied on it's own, and it COULD have some very positive effects. I also have to consider the evidence, albeit anecdotal, of the millions of smokers who started smoking in their developing years and did not suffer catastrophic brain damage. Who knows, maybe pfizer will develop a nicotine derived ADHD med, but chances are it would be worse for the user than simple nicotine in a vaporizer.