I am on Celexa for depression, and have been on Klonopin for a while, but I just read that Klonopin affects chemicals in the brain that may become unbalanced and CAUSE anxiety. I mainly need a benzo on an as-needed basis and I would like to try changing to the extended release Xanax tablets rather than being required to take 2-3 Klonopin a day. It gets confusing, but doctors are careful when prescribing these drugs, is there any info on which one is best after suffering concussions?