Beraprost sodium, an orally active prostaglandin I2 analog with vasodilatory, cytoprotective, antiplatelet, antithrombotic, and anti-inflammatory effects, 120 μg daily for 8 weeks, decreased plasma D-dimer, a marker of intravascular coagulation, and von Willebrand factor, a marker for endothelial injury, in 100 chronic peritoneal dialysis patients. Total cholesterol, triglycerides, high-density lipoprotein, apolipoprotein A1, apolipoprotein B, albumin, prealbumin, fibrinogen, troponin-T, and high-sensitivity C-reactive protein levels were not changed. Three patients complained of headache and 1 patient experienced facial flushing; however, no serious adverse effects were observed. These results suggest that beraprost sodium is effective in partially reversing the thrombogenic coagulation profile and endothelial injury in chronic peritoneal dialysis patients.