Experiment conducted on a Saturday on which I had nothing important to do.
8:20am Took generic Adderall XR on an empty stomach with my other medications.
9:45am Read an entire magazine without doing anything else.
Ate breakfast without feeling compelled to read, wander around, do chores, etc.
Did not make coffee - did not feel the need for coffee, because I was on speed.
11am Unloaded the dishwasher and broke down sobbing when I realized how easy this task was.
12pm Very thirsty, head felt dried out like when you take antihistamines. Headache could be weather-related, but who knows.
Happy to drink plain water - did not crave carbonation.
Heart rate slightly elevated, because on speed.
3pm Successfully and safely operated a motor vehicle while on speed.
4pm Mind alert, body calm. Completely, shockingly calm - zero fidgeting.
8:30pm Some physical effects remain, but I can tell the mental effects are beginning to fade by the number of open tabs on my web browser.
11pm Felt sleepy enough to go to bed. Slept normally.
Conclusion: Adderall is the answer to life, the universe, and everything.