Hi there. I thought I was just imagining things but now I know what I felt. I drink lots of coffee, tea or red bull. Depends how I feel. I have lots of caffeine everyday. I even drink it before I go to bed. The thing is it don't seem to effect me anymore. I sleep good and I am not really hyper. It don't wake me up anymore. Has caffeine lost its effects on me or do I need more? The only things keeping me drinking it is I love the taste and last time I tried to quit I felt ill. I need it. what is this?