Caffeine gives me mania symptoms, depending on where I get it from (coffee from certain places or some energy drinks). But sometimes it'll make me really anxious, and sometimes it doesn't affect me in the slightest.
Caffeine surprisingly doesn't affect me too much unless I have coffee (I also drink my coffee on the strong side so that could be why). I also don't drink energy drinks so coffee is my only go to for caffeine.
I just realised I didn't even think about how I react to sodas with caffeine or energy drinks, I only answered about my coffee habits!
I'm mostly fine with sodas like coca-cola, but I rarely drink these so that's probably why I haven't noticed anything. I do recall though having to do all-nighters often studying for exams (I was horrible at planning both during high school and college), and I drank energy drinks to help keep me awake. I drank too many of them one night and it made me really sick, I had to crawl into bed to try and sleep it off, which as you can imagine wasn't easy.
I haven't really thought about it, but caffeine actually makes me tired. I really don't know why.
I try to relax with the Coca-Colas otherwise I would get sugar withdrawals and regret it later on.
It makes me a little more alert and less sleepy so I drink coffee before long lectures. Sometimes it makes me a little anxious too if the energy it gives me gets channeled incorrectly.