Yes, not to scare you but they have tied both Celexa and Lexapro to heart arrhythmia. I didn't ever have a problem, even on 60mg of Celexa but if memory serves me right somebody on this board did have heart arrhythmia on Celexa. I can't remember the dose. That person ended up tapering off Celexa and I believe everything went back to normal. I can try to find the thread, as I don't remember the particulars. I believe this is a rare side effect.