I think 50mg depletes my dopamine. 40mg doesn't.

Taking an extra 10mg every day takes more dopamine every day from my brain than what it can regenerate.

That's what I think...

It lasts ~9 hours and the wakefulness lasts 14 hours or so.. If I take 100mg, I crash and fall asleep after 9 hours anyways.

It's strange. I wanted to increase it to 60mg if I couldn't have a 5-10mg Dexedrine at the end of the day but that's basically running the engine without oil or coolant.