Fulvestrant as Effective as Anastrozole in Breast Cancer

In two randomized trials described in the Aug. 15 issue of the Journal of Clinical Oncology, fulvestrant (Faslodex) was as effective as anastrozole for the treatment of women with estrogen receptor (ER)-positive breast cancer who were refractory to tamoxifen.

 “Fulvestrant represents an additional treatment option for postmenopausal women with advanced breast cancer whose disease progresses on tamoxifen therapy,” write C. K. Osborne, MD, from Baylor College of Medicine in Houston, and colleagues.

“Fulvestrant was at least as effective as anastrozole, with efficacy end points slightly favoring fulvestrant.” In this U.S.-based, double-blind, double-dummy, parallel-group study, 400 postmenopausal patients were randomized to receive either fulvestrant, 250 mg by intramuscular injection once monthly, or anastrozole, 1 mg daily by mouth. Median follow-up period was 16.8 months.

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