Daisymay, I believe you have this backward. Lexapro is the newer form of Celexa. I ,too, take citalopram, which is the generic form of Celexa. Lexapro is the 'new & improved' version of Celexa, which is why there is not a generic equivalent for it yet (and also why it is much more expensive).

My doctor started me on (1) 20 mg pill/day (for about 2 weeks), then went up to (2) 20 mg pills. I told my doctor that I thought I'd do better on something in between those doses. He has me taking 1 1/2 pills a day (total 30 mg) now, which seems just right.

Oh, and I take mine at night too. With antidepressant/anxiety meds, I have found that you often need to tweak the dosages (with your doctor's approval, of course) somewhat to find what works the way you need it to.