Hi Wildflower,
I logged onto the forum today to see if anyone else has had concerns with anxiety and depression while on tamoxifen. I was stable on Zoloft (an antidepressant) which was changed when I started tamoxifen in November. I have had moments of heightened anxiety but assumed it was just fallout from such a massively shit year. But, in the last week I've really crashed, with serious anxiety and depression causing my treating psychiatrist (who is part of the oncology team) to review me.
The psych actually said that tamoxifen can cause the symptoms of anxiety and depression that I've been experiencing. I'm really annoyed that noone mentioned that when I went on the tamoxifen. As a person with a history of mental illness, I should have been told what side effects to look out for and monitored regularly by the oncologist - I haven't seen him since October when he put me on the tamoxifen.
So, my heart goes out to you if you are still struggling and I also want to reassure you that the tamoxifen might be the cause of your psychological distress - it's best not to assume that it's down to you. See your doctor as soon as you can and hopefully it doesn't snowball! Sending you best wishes and love, this time after treatment is terribly difficult!