This study aimed to compare the efficacy of a selective activator of the Vitamin D Receptor (VDR) paricalcitol with calcitriol, for the repression in terms of intact Parathyroid Hormone (iPTH) secretion. A comparative study was undertaken in order to determine whether paricalcitol provides a therapeutic advantage to calcitriol. The groups has formed adult hemodialysis individuals treated with dialysis solution three times (4 hours, each seans) per week for 8 months with 1.25 mmol/L calcium (Ca) bicarbonate dialysate. Patients with iPTH levels over 400 pg/ml were treated with paricalcitol. In addition, their iPTH levels over 295 pg/ml were treated with calcitriol. The treatment was cut of both paricalcitol and calcitriol over CaxP > 65 and iPTH <295 pg/mL. The cure was regulated according to levels iPTH in patients both paricalcitol and calcitirol. The application was a rule as particular posthemodialysis. The patients were administered intravenosus paricalcitol 5-10 mcq and calcitriol 1-2 mcq as bolus. Diet restriction was referenced to reduce P levels. All the patients have been screened with parathyroid gland ultrasound and parathyroid scintigraphy. Compared to initial value we achieved 39.3% reduction in the group 2 iPTH concentration (569 pg/mL to 345 pg/mL). On the other hand iPTH concentration has been identified as 337 pg/mL initially while the mean value was 357 pg/mL at the study end of in the group1. In other words the mean average iPTH values is not reduced in group1. These results between Group 1 and Group 2 was statistically significant. As a result paricalcitol much more rapidly and meaningful to reduced according to calcitriol of iPTH levels in serum. On the other hand we have not found difference between two groups with minimal advers effect.