depression
"I see a recurring theme in a lot of these entries....(person x) was prescribed Tramadol for pain, and it did wonders for depression and mood.  However, when discontinuing use, one's symptoms quickly return, often worse than before....

Tramodol is an OPIATE.  Think Opium, Heroin, Oxycodone, Hydrocodone, Codeine, etc.

What you're describing is the pattern of Opiate usage and it's dangers.  This is why it is a poor choice for depression treatment - it's like giving a Mercedes to a guy who's lost his job and his house is being foreclosed on....feels good for a couple days, but....."