That is a severe understatement. Nicotine is consistently ranked as one of the most addictive drugs, near cocaine and heroin.
Only about 6% nicotine users manage to quit every year.
https://nida.nih.gov/publications/research-reports/tobacco-n...
Anyway, I told my psych about my plan, and he agreed there is research indicating nicotine works as a third-line stimulant medication for ADHD. In many modern, Western countries adult ADHD is not even recognized, let alone medicated, so one has to make do with what's available.
In my experience it is almost as effective as amphetamines, with fewer side effects, much longer lasting (a patch lasts 16+ hours), and very cheap - if you get them on ebay from China. Addiction potential is null: addiction is a function of how quickly the effect peaks, and it takes 3 hours. Not even lisdexamfetamine can compare with how unaddictive patches are.
That said, if I had access to prescription amphetamines, I'd go back to them, but I sure don't miss the days all it did was making me incredibly horny and focused scrolling social media all day long. It was a little too effective at keeping me engaged for my own good, so using a subpar medication means learning to live with ADHD, adjusting your life around your own quirk, rather than only relying on the medication to fix everything for you.