Have you looked into Provigil (modafinil) before? I originally started taking it for fatigue attributed to mis-diagnosed sleep apnea but have since continued to have a subscription through a psychiatrist, as I've found it to do wonders for concentration without some of the negative side effects of amphetamines (and the psychiatrist was thrilled that I already had a positive experience with an attention drug that wasn't an amphetamine).

Modafinil is on my list, I'm considering switching to it early next year to possibly replace adderall. If anybody is in a similar boat to me and is curious what my experience will be on it compared to adderall, I'll be publishing an extensive analysis on my blog, which is accessible through my user profile on this site.

I don't have ADHD but I've used both drugs for work, and Adderall works better, but Modafanil is not addictive. Modafanil gives you a similar hyperfocus without the euphoria of amphetamine. It has a high tolerance curve. It also has a flatter dose response curve (i.e. taking two modafanils won't give you twice the effect).

When my health insurance lapsed I was put on Adderall because despite modafinil being a generic, it was still too outrageously expensive to pay for out of pocket. I got no euphoria from Adderall. I was able to stay alert but I was jittery and wildly irritable. As soon as I was able to get good insurance again I dropped it for modafinil. I guess I should be thankful that Adderall didn't appeal to me due to its addictive potential.