Study to Compare Tamoxifen with an Experimental Treatment in Postmenopausal Women with Breast Cancer That Has Spread

What we are studying

The purpose of this study is to compare any good and bad effects of using Z-Endoxifen HCL to using Tamoxifen. Z-Endoxifen HCL could shrink cancer and prevent it from spreading, but it could also cause side effects. This study will allow the researchers to know whether this new approach is better, the same, or worse than the usual approach of using Tamoxifen. To be better, the study approach should increase the time to cancer progression by 3 months or more compared to the usual approach. The study researchers also would like to learn more about fatigue and quality of life. All study participants will be asked to complete a two question questionnaire. It will take less than one minute to complete the questions.

Who we are studying

  • Women
  • Races:
    • White
    • African American
    • American Indian or Alaska Native
    • Native Hawaiian or Pacific Islander
  • Hispanic or Latino
  • Ages 18 - 80

Eligibility Criteria

  • Females who have had no more than two prior chemotherapy regimens in the cancer that has spread

What is involved

  • Study participants will receive either Z-endoxifen HCI or Tamoxifen
  • Complete fatigue and quality of life questionnaires


For all study related visits, parking will be validated

Contact Information

Study Coordinator
Stacey Lewis

Disclaimer: The information on this website is for general informational purposes only and SHOULD NOT be relied upon as a substitute for sound professional medical advice, evaluation or care from your physician or other qualified health care provider.