I'm back on stimulants. I finally got another prescription last week. (it took some convincing and the promise to stay away from caffeine). It's only pills for about 10 days though. Better than none I guess. I just got them yesterday because it took the pharmacy so long to fill the prescription. Here you need a special prescription form to get some medications, generally things with large abuse potential.
Stimulants and taking my first dose of meds later in the helped me to stay awake reasonbly long. I was tired enough after 12 hours to go to bed. That would have been fine. Previous stimulant experience was that it cuts my sleeping down to about 12 hours a night, it's just the napping during the day that annoys me so much and that was a problem in college. Because if I'm tired, I fall asleep, no matter where. In class, at the desk, on the park bench. I even fell aleep in the lab once.