PRIOR CONCURRENT THERAPY: Biologic therapy: At least 1 week since prior hematopoietic growth factors Chemotherapy: See Disease Characteristics At least 4 weeks since prior chemotherapy Endocrine therapy: Not specified Radiotherapy: No prior radiotherapy to relapsed sites of vital organs (except as part of initial treatment) At least 4 weeks since prior palliative radiotherapy to bulky nodes Surgery: At least 2 weeks since prior major surgery Other: No other concurrent investigational drugs No concurrent beta adrenergic blocking agents