insomnia
"I have never been able to sleep more than 6 hrs. even when I was young.  As I aged I began having trouble sleeping more than 3 hrs at a whack. My doctor prescribed Mirtazapine 15mg. at bedtime.  It has changed my life!  I sleep a full 5 to 7 hours most every night.  I actually feel normal.  I have tried various anti depressants for the last 25 yrs, Effexor works best for me."