One of the most widely prescribed cancer drugs in the world, tamoxifen has been the focus of more than 25 years of research on its actions, benefits, and risks. Zeneca Pharmaceuticals, Wilmington, Del., manufactures tamoxifen and provided both the drug and placebo pills for the prevention study without charge.
For information on the Breast Cancer Prevention Trial and easy access to all clinical trials information
from the National Cancer Institute, go to: http://cancertrials.nci.nih.gov.
For information on National Surgical Adjuvant Breast and Bowel Project clinical trials, including future prevention trials, go to: http://www.nsabp.pitt.edu.
The National Cancer Institute's Cancer Information Service (CIS) is a nationwide information and education network for cancer patients and their families, the public, and health professionals. The CIS can provide information about breast cancer prevention, detection, treatment, and research. One toll-free number, 1-800-4-CANCER (1-800-422-6237) connects English- and Spanish-speaking callers all over the country with the office that serves their area. The number for callers with TTY equipment is 1-800-332-8615.