Hi, I had a 10 yr depression and was on a cocktail of various anti depressant drugs back starting in 1991 to 2002 when I finally got on desiccated thyroid support.
I had thought back 1991 it was sluggish thyroid but the MD I was seeing didn't know enough to put me on at least a theraputic dose of thyroid support. He knew little and I knew nothing back then.
Then I went to work and talked to many, joined support groups for thyroid help.
Long long story and many years of meds that didn't bring me out of "clinical" depression...than in 2002, my D.O. called in for armour and those years of depression lifted. And then in 2006, a lowness it me and that's when I found out about the Vit D deficiency and boy was I deficient. Lots of history and misery all those years.
Depression is huge with dsyfunctional thyroid. Here is a recent post I made here.
http://neurotalk.psychcentral.com/thread230559.html
So for me depression went bye bye with thyroid support and Vit D. No A/D's since 2002.