Menogaril was administered to 40 patients with advanced breast cancer who had not received anthracycline drugs previously. The drug was given iv as a 2-hour infusion, repeated every 4 weeks, at doses of 200 mg/m2 and 160 mg/m2 in good-risk and poor-risk patients. The overall response rate was 22% in patients with no prior chemotherapy and 10% in patients previously exposed to chemotherapy. Leukopenia was generally moderate and predictable. Phlebitis and erythema along the vein injected occurred in 34% and 17% of the cases, respectively. Menogaril is an active drug used in the treatment of patients with advanced breast cancer who have not had prior systemic therapy.