These kinds of medications definitely can cause either weight loss or weight gain in some people. Your weight gain
was pretty dramatic, so like you said, I'm sure the Lexapro
was only one factor.
Let me ask you this, have you TRIED any other medications? If not, I would recommend that you do that first. Zoloft would be one that I would personally recommend asking your doc about. Like Lexapro, many people have great success on it, and it's easily tolerated by most people.