PRIOR CONCURRENT THERAPY: Biologic therapy: Not specified Chemotherapy: At least 4 weeks since chemotherapy No more than 2 prior chemotherapy regimens for metastatic disease No more than 1 prior chemotherapy regimen in the adjuvant setting At least 1 prior regimen containing taxane or doxorubicin for metastatic disease or in the adjuvant setting Endocrine therapy: Not specified Radiotherapy: No radiotherapy to greater than 25% of bone marrow No prior treatment with strontium 89 Surgery: At least 4 weeks since major surgery Other: No concurrent metoclopramide