Last year, I was prescribed citalopram for my SAD. I started on 10 mg, then after a month 20 mg, and then 40 mg. For the first few days taking it I felt a little lightheaded at times, but it wore off. Another side effect was a slight pressure on my forehead once in a while.
I felt a change within a couple of weeks. My mood was lifted, and I felt happier. I also stopped having crying fits or the feeling of wanting to cry. In fact, I never cried while I was on it, which was a little strange to me. As for my anxiety, It seemed to alleviate some of it but I wasn't too sure. I decided to try 60 mg, which wasn't good. I started to get frustrated and angry, and also more anxious. So I went back down to 40 mg, which was good for me.
I am now testing out Effexor, but I may go back to Citalopram for various reasons.