Combined Estrogen Blockade of the Breast With Exemestane and Raloxifene in Postmenopausal Women With a History of Breast Cancer Who Have No Clinical Evidence of Disease

Patients will be randomized to either Raloxifene at 60mg P.O. (each day) for 2 weeks (time designated: week- 2) After two weeks of single agent therapy, patients will be started on combination therapy with oral raloxifene (60mg/day) and oral exemestane (25mg/day) (time designated week 0), and continued on both drugs for one year (month 12). Patients will be required to start supplemental calcium (900-1500 mg/day) plus vitamin D (400-600 units/day) P.O. each day during week 0.

Patients will be randomized to Exemestane at 25mg P.O. for 2 weeks (time designated: week- 2) After two weeks of single agent therapy, patients will be started on combination therapy with oral raloxifene (60mg/day) and oral exemestane (25mg/day) (time designated week 0), and continued on both drugs for one year (month 12). Patients will be required to start supplemental calcium (900-1500 mg/day) plus vitamin D (400-600 units/day) P.O. each day during week 0.