I've been told that new research shows that citalopram is not always recomended either - I have been advised to stop taking it and to switch to venlaflaxine.
Citalopram, although not as bad as some, can reduce the effectiveness of tamoxifen slightly - personally if I'm going to put up with all the crappy side effects of tamoxifen then I want to make sure I'm getting the full benefit from it.
I do know that you aren't supposed to take SSRI's (anti depressant meds group) at the same time as Tamoxifen. I think the pharmacist recommends taking one at night one in the morning. There are some good article if you Google Taking SSRI's With Tamoxifen looking at the research.I know it's not always advisable to Google but this is quite a specific subject.
Take Care Gilly x