Ten continuous ambulatory peritoneal dialysis (CAPD) patients experienced 23 episodes of peritonitis and were treated with intraperitoneal (IP) antibiotics as per sensitivity report. Serum ferritin was measured before and after the treatment. In 6 patients, erythropoietin (EPO) was also measured before and after the treatment. There was a significant drop in the serum EPO levels after therapy compared to the levels before, whereas serum ferritin levels did not change.