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  • Title: Evaluation of vitamin D repletion regimens to correct vitamin D status in adults.
    Author: Pepper KJ, Judd SE, Nanes MS, Tangpricha V.
    Journal: Endocr Pract; 2009 Mar; 15(2):95-103. PubMed ID: 19342361.
    Abstract:
    OBJECTIVE: To determine the efficacy and safety of commonly prescribed regimens for the treatment of vitamin D insufficiency. METHODS: We performed a retrospective analysis of 306 consecutive patients who were prescribed ergocalciferol (vitamin D2) for correction of vitamin D insufficiency at the Atlanta Veterans Affairs Medical Center between February 2003 and May 2006. Serum levels of parathyroid hormone, 25-hydroxyvitamin D (25-OHD), and calcium were compared before and after treatment with ergocalciferol. Patients who did not have a 25-OHD determination (n = 41) were excluded from analysis. Vitamin D deficiency, insufficiency, and sufficiency were defined as a serum 25-OHD level of <20 ng/mL, 21 to 29 ng/mL, and > or =30 ng/mL, respectively. RESULTS: We identified 36 discrete prescribing regimens. The 3 most common regimens were ergocalciferol 50,000 IU once weekly for 4 weeks followed by 50,000 IU once monthly for 5 months (n = 48); ergocalciferol 50,000 IU once monthly for 6 months (n = 80); and ergocalciferol 50,000 IU 3 times weekly for 6 weeks (n = 27). Each of these 3 treatments significantly increased serum 25-OHD (P<.01), but vitamin D sufficiency was achieved in only 38%, 42%, and 82% of study subjects, respectively. Regimens with >600,000 IU of ergocalciferol given for a mean of 60 +/- 40 days achieved sufficiency in 64% of cases, without vitamin D toxicity. CONCLUSION: In this study, regimens that contained at least 600,000 IU of ergocalciferol appeared to be the most effective in achieving vitamin D sufficiency. Guidelines for the treatment of vitamin D insufficiency in healthy adults should be developed.
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