title: Dose equivalence between continuous erythropoietin receptor activator (CERA), Darbepoetin and Epoetin in patients with advanced chronic kidney disease.
abstract: BACKGROUND
  Anemia is a prevalent situation in patients with chronic kidney disease (CKD) and can be well managed with erythropoiesis-stimulating agents (ESAs). Continuous erythropoietin receptor activator (CERA) has a long half-life that allows to be administered once monthly. The lowest recommended dose for patients with non dialysis CKD is 120 μg per month. The objectives were to assess the efficacy of subcutaneous monthly dosing of CERA in CKD stages 4 and 5 not on dialysis, and to determine the equivalent dose to epoetin β and darbepoetin α.
  
  
  METHODS
  This is a cohort study. A 30-patient group that ESAs was changed to CERA (μg/month) was used as treatment group. We used the following clinically-based equivalent dosing: epoetin β (IU/week) and darbepoetin α (μg/week): 3000/15= 50; 4000/20=75; 6000/30=100; 8000/40=150. Another group of 30 patients with similar characteristics was used as control group and received the same epoetin β and darbepoetin α doses.
  
  
  RESULTS
  The mean CERA initial dose and at 6 months was 81.9 ± 35.2 and 82.0 ± 37.82 μg/month (p=0.37). The mean erythropoietin resistance index (ERI) and hemoglobin at baseline and at 6 months in the CERA group and in the control group were not statistically significant.
  
  
  CONCLUSIONS
  Monthly dosing treatment with CERA is safe and effective. A dose of 75-100 μg/month is enough to maintain stable levels of hemoglobin. Hippokratia 2014; 18 (4): 315-318.
authors.affiliation: Nephrology Department, Hospital General Universitario Gregorio Marañón, Madrid, Spain.
authors.forename: A
authors.initials: A
authors.lastname: Vega
authors.affiliation: Nephrology Department, Hospital General Universitario Gregorio Marañón, Madrid, Spain.
authors.forename: S
authors.initials: S
authors.lastname: Abad
authors.affiliation: Nephrology Department, Hospital General Universitario Gregorio Marañón, Madrid, Spain.
authors.forename: U
authors.initials: U
authors.lastname: Verdalles
authors.affiliation: Nephrology Department, Hospital General Universitario Gregorio Marañón, Madrid, Spain.
authors.forename: I
authors.initials: I
authors.lastname: Aragoncillo
authors.affiliation: Internal Medicine, St Columciles Hospital, Dublin, Ireland.
authors.forename: K
authors.initials: K
authors.lastname: Velazquez
authors.affiliation: Nephrology Department, Hospital General Universitario Gregorio Marañón, Madrid, Spain.
authors.forename: B
authors.initials: B
authors.lastname: Quiroga
authors.affiliation: Pharmacy Department, Hospital General Universitario Gregorio Marañón, Madrid, Spain.
authors.forename: V
authors.initials: V
authors.lastname: Escudero
authors.affiliation: Nephrology Department, Hospital General Universitario Gregorio Marañón, Madrid, Spain.
authors.forename: J M
authors.initials: JM
authors.lastname: López-Gómez
keywords: Anemia; CERA; continuous erythropoietin receptor activator; darbepoetin α; epoetin β