I took Celexa for a while, do not really remember that it made me gain weight. I am a BPI and my PDr thinks anti-depressants for someone who is mostly manic is a no=no. I have GAD as well. Recently started on Saphris, new mood stabilizer, and it has seemed to take care of anxiety as well as balance my moods. The mixed episodes are still a little rough but over all it works well.