Has anyone been on Celexa and switched to Lexapro or vice versa? What differences did you notice in the two meds? I'm going to try to come off Celexa in a couple of months but if it doesn't work out I may try Lexapro. Both me and my mom gained weight on Celexa (maybe it was from diet changes, maybe the med, but I'm tired of not being able to lose this weight). She has lost a ton of weight on Lexapro, again it could be related to other factors. She's always been pretty thin anyway. But the fact remains I weigh more than I ever have in my life right now and I would like to go ahead and be able to lose this weight. I feel unhealthy.