I have just started with my ADHD diagnosis.
My 15 yr old son was recently diagnosed.
This led to me asking questions about my self. Sadly I have always thought I was lazy.
I am 55 years old and have been tired all my life.
I live in Australia and have to be assessed by a psychiatrist to obtain medication.
so it seems to me that your tiredness is from your ADHD rather than from taking the medication for years.
Thanks for the information about exercise. That really explains why I have always been able to do hard physical work and stay awake
but work sitting and studying etc makes me sleepy even when it is interesting.