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Converting to Doxercalciferol Capsules From Intravenous Paricalcitol or Doxercalciferol

Converting to Doxercalciferol Capsules From Intravenous Paricalcitol or Doxercalciferol

K Shashi Kant, Alejandro R Gonzalez, Srinivas Hariachar, Marializa Bernardo, Ajay Duggal, Sara Engstrand, John Hunter, Melissa Plone, Joachim Hertel

J Ren Nutr. 2012 Jan;22(1):34-40.e2.

PMID: 21652220

Abstract:

Objective:
The purpose of the 2 studies presented in this article was to determine the clinically appropriate dose of doxercalciferol capsules that is required to maintain similar intact parathyroid hormone control when converting from intravenous (IV) paricalcitol or doxercalciferol.
Design:
Both studies were multicenter, open-label, randomized designs comprising the following 3 periods: a screening period, a 5-week run-in period, and a 5-week treatment period.
Setting:
Dialysis centers in the United States.
Patients:
Patients with stage 5 chronic kidney disease receiving dialysis 3 times weekly for a minimum of 6 months and with recent intact parathyroid hormone measurements between 15.9 and 63.7 pmol/L (150 to 600 pg/mL) were included.
Intervention:
After a 5-week fixed-dose IV paricalcitol or doxercalciferol run-in period, subjects were randomized to doxercalciferol capsules for the 5-week treatment period. Conversion factors for the paricalcitol study were 0.5, 1.0, and 1.5 times the current paricalcitol dose. Conversion factors for the doxercalciferol study were 1.0, 1.5, and 2.0 times the current doxercalciferol injection dose.
Results:
The predicted conversion factor for paricalcitol injection to doxercalciferol capsules was 0.92, whereas the factor for doxercalciferol injection to doxercalciferol capsules was 1.49. No statistically significant changes in serum calcium and phosphorus levels were found in either study. The nature of adverse events was consistent with the administration of an active vitamin D therapy to patients with chronic kidney disease receiving dialysis.
Conclusion:
The studies demonstrate patients on dialysis can be safely and effectively converted from IV paricalcitol or doxercalciferol to oral doxercalciferol.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
AP54573750	Doxercalciferol		54573-75-0	Price

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