anxiety and stress
"I work for a large Fire Department.  I was having a tough time with some bad calls.  No sleep, always feeling like I'm in trouble, like I'm drowning and no one can help me.  My doctor put me on Celexa and life came back.  I worry about the things I need to be worried about and don't stress about the things that shouldn't stress me.  I feel "normal" again.  I believe it saved my career."