[Efficacy and safety of long-term erythropoietin therapy in chronic hemodialysis patients with renal anemia].

In order to examine the efficacy and safety of long-term erythropoietin (rHuEPO) therapy, 103 hemodialysis patients were treated with rHuEPO for their renal anemia and the effects were observed for 1 year. Within 3 or 4 months after starting the rHuEPO therapy, the hematocrit (Ht) value rose up to nearly 30% and the level was maintained thereafter by approximately 4500 IU per week of rHuEPO. Tachyphylaxis did not occur even after 1 year of rHuEPO treatment. Symptoms such as headache, dizziness or palpitation were markedly reduced with the improvement of anemia. Although blood pressure was modestly elevated (systolic by 9 mmHg, p < 0.01 and diastolic by 5 mmHg, p < 0.01 at 6-month-stage), only 1 patient was forced to stop the therapy. Moreover, the blood pressure was successfully controlled to the original level after 11 months. This blood pressure elevation was not related to the increase of Ht level nor the dose of rHuEPO. Serum protein, lipid, electrolytes and liver enzymes did not change during 1 year of rHuEPO therapy. These results indicate that rHuEPO treatment is effective and innocuous as a long-term therapy of renal anemia in hemodialysis patients.