I was diagnosed with ADHD before the BP2 diagnosis came along. Ritalin did nothing for me, except causing a crash and headache when the effects wore off. Adderall caused anxiety and bruxism, although it helped me focus. My current psychiatrist has taken me off stimulants because they would ultimately lead me into quite intense hypomania. My focus is not as great as it was when I took adderall, but ultimately I think it's for the best because I really hated the feeling of being on stimulants.