Thank you so much for your replies. I feel seen and understood! My doctor said something is better than nothing so I'm going to try the 5mg. Apparenly this dosage isn't available in pill form here in the US, but is in Europe?? Has anyone else heard that? I'll try to use a pill-splitter to cut the 10's.
I agree that a one-size-fits-all approach isn't realistic. Am hoping more research comes out about a lower dose. There is absolutely no way I could have remained on the 20mg when I could barely walk. I am an active person and exercise is really key to my well-being. I've gained about 10-15lbs since starting tamoxifen....sigh. I will also do some further research on anastrozole and indole-3-carbinol. Thank you friends.