From someone who's been on Citalopram for four years, I speak highly of it (apart from the fact i've been on it for so fucking long i can't get off the buggers, but that's not the fault of the drug per se...)

You might feel a bit dizzy/spaced for a few days - I take my meds at night so that if there is any side-effects they can wreck havoc on me while i'm alseep. they also tend to make you a bit drowsy so can also help you get off to sleep in the first place. Oh, and keep a glass of water handy as they can give you a dry mouth!

Not that i'm an expert at this ;)

(oh, and seroxat is a pissing AWFUL drug. I wouldn't touch it with someone elses!!)