My DH (when he was just BF) split up approx 10 years ago for 3 months. I was depressed (before I left) and started to take ADs at the same time as the split & went to live with my DF.
I lost loads of weight (nearly 3 stone) then we got back together, came off ADs and pretty quickly regained the weight.
Long story short, I have started to take AD again and it's been a week. I have lost 6 pounds. IT WASN'T THE DEVASTATION OF THE SPLIT. It was the antidepressants that made me lose the weight. Excited.