A few years ago while I was in college a professor pointed out that I should be checked out for ADHD because I was hyper and lacked focus/attention. I met with a psychologist of which she felt I had ADHD and recommended that I be put on Ritalin. Five years later I had an upheaval in my life which precipitated extreme psychosis. My then psychiatrist suggested that I discontinue the Ritalin as she felt that it only exasperated my symptoms. She didn't feel Ritalin created my psychosis, but felt that it didn't help my psychosis by having a stimulant added to the mix.