anxiety and stress
"I was prescribed 20mg Celexa and 0.5mg of Xanax, first day I took both as directed, slept for an hour and a half and once I woke I had a panic attack for the next hour or so.  The next day I took just the Celexa, slept for an hour and a half again, this time the panic attack was much worse, dizzy, felt like getting sick, come close to calling 911. It finally subsided and went to bed only to lay there wide awake, felt out of it all day.  

Dr said to stop taking it, prescribed Paxil since I've had success with it before."