Exactly what happened to me. I lost a lot of weight during my depression. Lexapro was relatively new when it was proscribed to me. My doctor told me when I came out of my depression I had to be careful of weight gain and he was right. I actually became euphoric and found myself walking out the front door on my way to work singing out loud.
I don't use the term often, but these SSRI's are close to a miracle drug.