PRIOR CONCURRENT THERAPY: Biologic therapy: At least 4 weeks since prior myeloid growth factor Chemotherapy: At least 4 weeks since prior chemotherapy No more than 1 prior chemotherapy regimen (excluding adjuvant chemotherapy) Endocrine therapy: Not specified Radiotherapy: At least 4 weeks since pelvic, para-aortic, inverted Y, cranial, spinal, or mediastinal radiation Surgery: At least 2 weeks since major surgery Other: No antihypertensive medication within 24 hours of amifostine administration