I was on Adderall for mild ADHD for 10 months in 2016. Software Engineers in my late 20s. I found that I was not finishing any of my side projects. Was working (and still do) for a FAANG. Consulted a real doc i.e Psychiatrist in San Francisco and he diagnosed me with very mild ADHD Attention deficit hyperactivity disorder)
Apparently this is quite common in adults these days, esp. in high intensity brain-work related professions like Software Engineering, Finance / Wall Street and such.
My prescribed dosage was 5 mg / day of Adderall, the lowest possible dose. I was very concerned about long term side-effects and the doc assured me that it was perefectly safe. He said that it's not the same as crystal meth like the media would have you believe. In my last outing , I mentioned the "Take my Pills" netflix documentary and his take was that the documentary featured extremes cases of very high dosages (the 3 people featuered were on atleast 50 mg / day, = 10x my dosage) and also that 2 of the 3 didn't have any ADHD or ADD symtoms - the football player and the girls in school.
Now for the effects, I can say it's incredible. The first day I felt lazor like focus. I walked into work, and finished a javascript library that I'd been stuck on for days, in like 4 hours. I even helped a super-star Russian coder fix a nagging complex multi-threaded bug. I didn't (and still don't feel) "high" from it. What I feel is extremely sharp focus, like I notice very small things out of order and correct them, in codebase and outside in my daily life. In the first month or so, I also got lot of "life-things" that I'd be procrastinating on done, like I did my TRUST, Living Will etc.