Caffeinated symptoms and conditions

I am 19 and not clinically diagnosed with ADD, but it makes me feel jittery and light-headed. when i first started using this, I needed food in my stomach and not just a caffeinated stimulant (don't just have coffee for breakfast when you take this drug in the morning) because it made me have nausea and vomit.

the only side effect I noticed from prednisone was amazingly enhanced alertness... I was prescribed a gradually declining dose over a 10-day period for an acute lung condition. the lungs improved completely for a short duration (5-6 weeks), but the level of alertness I felt was unlike anything I had ever felt in my life; it was a zen-calm-like alertness, not a caffeinated-buzz-like alertness, and it truly felt like this is the way we humans ought to feel all the time; I sorely miss that experience!