anxiety
"I was prescribed Xanax in 1993 when I started college at age 35. Have Panic Disorder, anxiety disorder and PTSD. Dosage has always been .5-1 mg daily. I'm completely a different person with it!! No more stuttering, no more panic attacks and running out if class to hide. 

I've never had to increase the dose since 1993. I could never gave gotten through 16 years of college without it!!"