I was developing the exact same thing and persuaded my MD to prescribe a very small dose of ritalin and/or adderol (highly addictive meds, used largely to treat hyperactive children), 5 mg/day. I emailed her daily about
my usage and reactions. This gave her the confidence in me to let me increase it to 10 mg/day (the ritalin was better than the adderol and a LOT less expensive ($27/3 month supply). It works ENORMOUSLY. I firmly don't take more that the one pill in the morning and I dont take it at all on weekends because one habituates quickly. Mondays are Chistmas for me. I suggest a small, careful trial and you'll need an md's supervision becasue these meds are higly addictive and very controlled.
Let me know how it goes for you. I've been doing this for 4 months now and it helps a great deal. A certain discipline is required to manage it.