http://www.cancerpage.com/news/article.asp?id=11974
If this link takes, I think it might have more. My doc's only restrictions were not the day before or day of chemo. During chemo, alcohol wasn't terribly appetizing. It seems to me the studies aren't conclusive, so I still drink beer. I'm really guessing here, but it would seem that AI's would be more effective in mopping up excess estrogen created by alcohol consumption than tamoxifen, which would only matter if you're ER+.
I think this is another one of those you have to weigh and decide. I've decided not to let it worry me. BB