I was on and off Celexa for about five years. I'd go off it when I felt fine, be OK for months or years, then start it again when I could tell things were going to get to a point where I needed it.
Turns out I was undertreated but also that it was the wrong drug for me since it has a calming effect and I already have a "let the house turn into a landfill, I don't care" attitude.
I think when my internist prescribed it, it was the hot new drug on the market, so that's what everyone was getting.
If it's any consolation, I didn't have any intolerable side effects on it.