Have you tried a nicotine patch?
Taken for a short period each morning at a low dose (cut an 8mg patch into sections) it offers similar stimulant effects, but with fewer side-effects. Nicotine patches are reportedly less agitating, less addictive, less expensive, and more available than Adderall. It also measurably improves cognitive ability according to some studies I've read online.
I'm almost 40 years old, and I have ADHD-inattentive. For two weeks I've been using sections of nicotine patches - about 1/4 of an 8mg patch for an hour each morning, and I have never found it more easy to be focused and productive.
Just be careful to not use too much, especially if you've never been a recreational nicotine user. I've had several nights when it's been difficult to sleep -- which has been a signal that I need to decrease the morning dose.
(I'm not a doctor, this is not medical advice)