One thing I noticed: Other people would get hyper from coffee, I would not. My brain would calm down a lot with the help of caffeine.
I would regularly down 3-4 red bulls (diet) in the evening if I knew I needed to fall asleep and sleep well. I'm not sure if it's been studied but anecdotal evidence from others seem to suggest I'm not alone and that some others have the same experience.
N=1, I sleep better on stimulants than off them. No problem falling asleep after drinking coffee (usually it makes me more sleepy), or even taking a prescribed stimulant before going to bed.
Paradoxical effects are not uncommon. My DNA is weird. I have lots of them.
One example, is opiates make me MOVE. Most people they zonk out, not me. I'm ready to move your house, one brick at a time, with my bare hands and feel like I could knock it out in about an hour.
Proton Pump inhibitors are common meds for acid reflux. About 10 years ago, I did a genetics study (I worked at the lab, and my data stayed mine) and learned that of the 7 classes of PPIs available, at that time, my body only works with 1. The others either have little/no effect or similar.
New research doesn't seem to support that stimulants have a paradoxical affect on those with ADHD (the sources cited were pretty interesting in my opinion). I'm not saying it's not possible for some, but it seems like people make it out to be far more common that perhaps it truly is.
I would regularly down 3-4 red bulls (diet) in the evening if I knew I needed to fall asleep and sleep well. I'm not sure if it's been studied but anecdotal evidence from others seem to suggest I'm not alone and that some others have the same experience.