Although I have never taken Lexapro, my doctor told me it is a weight neutral AD and won't lead to weight gain like paxil, etc. However, your experience seems to bely that.

I am on Wellbutrin and so far has not lead to weight gain and in fact curbs my appetite. My PNP told me that sometimes her prescription of it is questioned as they want to make sure she is not prescribing it solely for weight loss.