My first experience with 20mg adderall xr (210 pounds), I was really productive, but I agree breakfast and slept the night before.
11am saturday - First time was with a good amount of sleep, and a big breakfast. I felt focused, energized, and kinda comfortable. Felt pretty warm, and mouth was kind of dry. All I had to do to start working was have my work in front of me and simply begin. I didn't care about anything other that competing the work I was doing, and it was impossible to switch tasks, or assignments. The work wasn't fun, but it was addicting. I didn't think about all the other things i could be doing, the work i was doing was all that I cared about. I litterly only did my work, for about 8 hours straight. I didn't eat all day, I didn't realize my bladder was full till I couldn't hold it in. At around 3am it began to wear off, I swapped assignments, solved a few problems, then felt REALLY frustrated (banging table, almost crying, practically had a tantrum) because my mind started to get foggy, and I had thought blocks, so I couldn't solve any more. My mind felt far foggier and crappy than usual.
Sunday - Woke up at 8am, ate breakfast, took it, same thing, accept I stayed up all till 5am on Monday, doing work.
Monday - Woke up at 6am, ate a muffin I took it right after that. Normally with that little sleep, I would be super sleepy, body would feel too fatigued to move, and just unable to even think (fog, can't even make out thoughts) After taking it, I felt really uncomfortable, really dry mouth, sweaty head, really hot, stomach hurt, super fidgety (my arms spazzed). Aside from stomach pain, and my first two days, I never felt that way before. And apart from making more small mistakes on my work compared to my first two days, and without adderall in general. I was operating at peak performance, and didn't think about the side effects. It was just as good, if not better than sleep. I had way more energy than I ever do, super jumpy, and just doing anything was fun, and blissful, I could make small talk, laugh at any joke WHEN around people, make eye contact. It's like racing a super fragile f1 car that was battered up, unbalanced, and isn't supposed to drive well in that condition, but it just does, as if nothing happened. I felt like i could be a soldier, arm gone, bleeding to death, that just found out my wife is leaving me, and still be able to be clever and kickass.
I remember that day this girl I had a crush on, but barely spoke to just came to me and started taking to me about something intimate. I would be excited, but I didn't care, I wasnt dorky or nervous, and unable to make a good conversation as normal do. I couldn't comprehend, or think about how awesome that was it felt like bleh. I got some bad news, and instead of being sorry depressed, I just felt bleh.
The key thing about adderall, that keeps you working on normally unfun things is that you can't think of more fun things, or how much what your doing sucks. And when you really feel the drug, you can't truly feel emotions. My mind couldn't think of why i should feel happy, sad, angry, joyfull, or why something is funny, because my subconscious prevented me from beginning dig into memory, and to make connections, meaning your unable to comprehend the implications, or the benifits, and I'm general draw anything from it. You could win a million dollars out of the blue, but you wouldn't really care, because normally, your subconscious would think "a million equals alot of money", then your mind would think "gee I can buy a nice car with this, or a house for my kids". Instead, while on adderall at the most your thinking," it's nice but, why is a million dollars important? ", "shouldn't I care?".
I never felt the extreme, uncontrollable energy, and discomfort, and inability to feel emotions again though, even about a month later when I binged (50mg xr within two hours). It was just as effective, but not that insane, or euphoric, and with no side effects Even with a lower dose, work isn't addicting, but anything is bearable.
In hindsight, I regret taking it with little sleep, I had to do sorting that day that had no room for mistakes, and I made overlooked alot of simple things.