Kiya, Celexa and Lexapro are very, very similar chemically and are both supposed to be good for anxiety/depression and be weight neutral. (YMMV, of course.) Since they're so similar, I'm not sure if you would have any withdrawals at all. People are often switched from Celexa to Lexapro because some people become nauseous on Celexa. Lexapro tends not to have that effect. So if you begin to feel queasy after switching to Celexa, that could be the reason and you'd have to see how bad it is before deciding whether to switch back to Lexapro. However, many people do not have stomach problems on Celexa, and I hope you will be one of them! (Why are you switching from L to C? Is it the cost? On my insurance, Celexa is much, much cheaper than Lexapro.)