Nicotine doesn’t really have any good MOAs. Inhalation is very short lasting, addictive, and gross and unhealthy. Pouches are harsh and still don’t last very long, gum (especially Lucy brand) is better but still has the same issues. And patches cause a lot of arm irritation. And all of these are very easy to overdo and make you feel somewhere in between physically uneasy and on edge to sick, that is until you get used to them and then you feel that way when you’re off.
Also personally, it doesn’t even help me with focus, in part because administering it is too distracting. I wonder whether there’s a place for an extended release nicotine pill, although that would probably be pretty rough on the gut.
The best I’ve found for focus is simple caffeine. Amphetamines are good for motivation but give me too much motivation to do things other than what I need to be doing. Methylphenidate is maybe a bit better but still a similar story. They also both have considerably worse side effect profile than caffeine. YMMV though, I am an adhd-coded individual and everyone’s brain chemistry is a bit different anyway. Lion’s mane and/or Cordyceps double extract tincture is not bad but I’ve grown to be weary of neurogenic drugs, although that is more of a personal decision.
