anxiety
"I was prescribed regular Xanax in the early 90's for anxiety and it changed my life - for the better.  I was more productive than ever, my relationships got back to where they should be, and I was finally sleeping well.   As time went on, my tolerance increased and I suffered significant peaks and valleys between doses throughout the day.  Xanax XR was complete game changer for me - a completely different medication.  I take it in the morning and feel great all day long and I sleep well.  I still take the regular Xanax on occasion if my anxiety flares.  The XR version is far better but much more expensive.  The $120/mo is nothing when it comes to quality of life.  ."