Celexa and Lexapro are just about the same. I am on Lexapro right now and it is working great. All they did was took something out of Celexa to make Lexapro. Instead of taking 20mg of Celexa, you would only have to take 10mg of Lexapro and it is supposed to last longer too. I find it works well for me, but sometimes you have to experiment with different ones to find out which is best for you.
They are all SSRI's that help treat panic, anxiety, and depression. I was told by my doctor that Lexapro was used more for panic attacks.
I was on Paxil for a whole year with no side effects. I didn't even have trouble getting off. That was about 5 years ago. I tried it again recently since I was on it before and it didn't work for me. I'm not sure why, I guess your body just changes as you get older. Anyway, hope this helps a little:)