Can you safely take Adderall for 30+ years?

I’m 66 year old, been on Adderall since 1997 or 1998. Been at 60 mg for 3 months. Was on 40 mg for at least 15 years. I also take 5 mg. of Ambien every night. I hate it. Wish I never started. I feel like it’s depleted my body of natural energy. I wonder what I’d be like today if I never started.
It as been extremely helpful, and has done what it’s supposed to do, but I can’t help feeling like I cheated. I have 3 brothers that have been diagnosed as being pre-Alzheimer’s, or with early stages of dementia. I just underwent an extensive evaluation by a University. It was determined that I am not a likely candidate for Alzheimer’s. I don’t have the markers in my bloodwork.
So- there I am. I’m glad I’m not like my brothers. We don’t know if my brain is healthier than theirs because of the medication. I should add that because of the meds, I have actively worked on keeping my brain stronger. I work puzzles and do about 8 different types of games every day. I have seen my progress since I started doing. Still- I’m tired of it. I’m especially tired of the years of bullshit in dealing with doctors. I went off of Adderall when I got Covid. I was fucking mush without it. I literally did not even feel safe to drive.
I feel that I can be of value to a program that is doing research on long term Adderall patients. If anyone has heard of any studies let me know.

/r/adderall Thread