depression
"I have been taking 15mg a night of mirtazapine for about a month.  I did have some of the well known side effects at first.  I had an insatiable hunger, and was extremely groggy in the morning.  However, for me, these went away after about a week and half.  I am now able to eat normally, and wake up feeling refreshed, and not groggy.  I also workout 5-6 times a week.  I'm not sure if that helps the symptoms or not, but it obviously slowed the weight gain as this medicine is prone to cause because of the increased appetite.  It has absolutely helped with sleep, and with my depression."