Hello Chanel,
There maybe a number of reasons why Tamoxifen did not work for Melinda but it has worked for many other women. Unfortunately no matter what treatment we are given, some of us will have a recurrence. Nothing has a 100% success rate but most women live long cancer free lives with these treatments. All any of us can do is follow the best recommendations from our medical team for our particular situation. I was on Tamoxifen for 2 years and found I had few side effects. I hope you find the same. As iserbrown suggested your doctors are the best people to answer any concerns you may have. Take care.