Tamoxifen
"I've been on Tamoxifen for a year now.  A few joint aches but all in all not too many problems.  When I started the medicine I was a Pescitarian( only at fish or seafood)  I have maybe two hot flashes at night.  I take my pill at 5pm daily.  I too was told I need to be on it for 10 years.  Considering the alternative, I don't have too many bad things to say about it.  Glad to be cancer free!!  Hope this keeps me that way.  Turning 50 in three days!!"