I realised this feeling is why I have such an issue avoiding caffeine, even more after starting on ritalin.

It’s that, “I’m really starting to feel awake and capable now” feeling, sometimes a light tenseness in the back of the neck.

What is going on here, neuronically?

Also a time when I really crave nicotine. I’m trying to quit the nicotine so if I can understand this feeling, I can make a strategy to avoid it.