anxiety
"In 2001, I started feeling like I was having a heart attack twice a month.  I ended up in the ER & was admitted.  I happen to be one of the lucky females who suffers from hormonal anxiety.  I was given all the tests possible, stayed overnight & discharged with my first script of the smallest dose of xanax.  I have used it only AS NEEDED since then and to this day it still helps me at the smallest dose once a day.   I have gone through some very serious rough patches in my life which had me taking this, at most, 1.5 pills maybe four days in a row.  It works so well that I can't ever imagine taking it more often than needed ~ why would you want to mess up something that works??  The key is taking it as prescribed, just like any medication."