I've heard of nicotine as nootropic and I've been meaning to get the gum. Also, I believe it's about the only thing in cigarettes that is not carcinogenic.
That can seem like a nootropic (some definitions even explicitly include them) especially if you have anxiety.
The con of this is nicotine addiction.
Cognitive Behavioral Therapy, exercise and meditation all beat nicotine in effectiveness as anxiolytics and in strength of effect.
To that end, non-combustible methods of nicotine might give the benefits without the addiction negatives (but still risks of e.g. pancreatic cancer)
Not arguing for the use of nicotine, but there are reasons people like taking pills (or chewing gum, as the case may be).