I think one has to have a serious amount of caffeine for that to happen, rather like drinking a lot of alcohol can.

I have 3 double cappuccinos a day to keep me awake. If I stop for just one day I get a horrible headache and function worse than usual.

My psychotic episodes are often not mood related, and having my coffee doesn't seem to make any difference, but stopping it... That is when things get wobbly. I get more anxious and paranoia seems to be worse.