Hi Julie,
Welcome to Connect. I'd like to introduce you to a few members who have taken tamoxifen. Please meet @kat9606 @hereigoagain @conny51 @tula and @elliemac to name a few.

Julie, have you taken tamoxifen for 5 years already and are asking about the effectiveness in reducing recurrence by taking it longer?

Have you read this article from BreastCancer.org?
Another Study Shows 10 Years of Tamoxifen Better Than 5 for Early-Stage, Estrogen-Receptor-Positive Disease
http://www.breastcancer.org/research-news/20130604