depression
"I've been on 10mg now for 4 weeks.  I was on zoloft before that and was noticing tiredness and being unmotivated to do anything.   

While weaning off zoloft and being on brintellix i did notice more energy and better mood, but now I seem back to how I was before.  My doctor just upped my dose to 20mg and said that should help.  

I did notice increased appetite and it feels like I am hungry ALL the time!  I hope this stops soon."