http://www.ncbi.nlm.nih.gov/pubmed/25651487

.- neonatal cholestasis

Jensen M, Abu-El-Haija M, Bishop W, Rahhal RM. Difficulty Achieving Vitamin D Sufficiency With High-Dose Oral Repletion Therapy in Infants With Cholestasis. J Pediatr Gastroenterol Nutr. 2015 Aug; 61(2):187-9.

Abstract

OBJECTIVES:
Oral high-dose repletion vitamin D therapy, also known as stoss therapy, can be effective in the treatment of nutritional vitamin D deficiency rickets in infants and young children without liver disease and in patients with cystic fibrosis. There is no literature about this approach in infants with new-onset cholestasis.

METHODS:
This was a retrospective chart review of infants with cholestasis from March 2010 to March 2012 at a pediatric tertiary care center. Four cases satisfied the inclusion criteria, and were described in detail.

RESULTS:
All of the patients received oral high-dose repletion therapy with ergocalciferol (vitamin D2) 300,000 IU daily for 2 to 3 days. Follow-up vitamin D levels approximately 4 weeks later showed failure to achieve sufficiency levels (>20 ng/dL) in any patient.

CONCLUSIONS:
Unlike infants without liver disease, use of oral high-dose repletion therapy may not be adequate as treatment of vitamin D deficiency in the setting of cholestasis.