My dad (70 yrs) has Parkinson's Disease with all the tremors, tiredness, and depression that seems to go with it.
I (his daughter, 43 yrs old) currently take 30 mg Adderall XR
for Adult ADD. We went on a trip this last weekend, and I very kindly (lol) shared a few of my Adderall with him - at my mother's suggestion.
Here's the thing, he LOVED it! He said it was the first time in about 20 years that his depression had been "lifted" for a while.