Pharmacokinetics of a single, large dose of cholecalciferol  

Oleh:

Ilahi, Marium ; Armas, Laura A.G. ; Heaney, Robert P.

Jenis: Article from Journal - ilmiah internasional
Dalam koleksi: The American Journal of Clinical Nutrition vol. 87 no. 03 (Mar. 2008), page 688.
Topik: Vitamin D ; cholecalciferol ; 25-hydroxyvitamin D ; therapeutic use ; calcidiol ; hydroxycholecalciferol ; calcium

Ketersediaan

Perpustakaan FK Nomor Panggil: A07.K.2008.01 Non-tandon: 1 (dapat dipinjam: 0) Tandon: tidak ada

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Isi artikel

Background: There is much interest in dosing vitamin D intermittently for patient convenience and long-term adherence. Objective: The objective was to characterize the time course and response of 25-hydroxyvitamin D (calcidiol) to a large oral dose of cholecalciferol. Design: One group (30 subjects) was supplemented with a single oral dose of 100 000 IU cholecalciferol. A second group (10 subjects) served as a control group to assess the seasonal change of calcidiol. Serum calcidiol concentrations were followed for 4 mo. The subjects were healthy with limited sun exposure (<10 h/wk) and milk consumption (<0.47 L daily). We excluded subjects with granulomatous conditions, liver disease, kidney disease, or diabetes and subjects taking anticonvulsants, barbiturates, or steroids. Results: Serum calcidiol rose promptly after cholecalciferol dosing from a mean (±SD) baseline of 27.1 ± 7.7 ng/mL to a concentration maximum of 42.0 ± 9.1 ng/mL. Seven percent of the supplemented cohort failed to achieve 32.1 ng/mL at any time point. The highest achieved concentration in any subject was 64.2 ng/mL. The control group had a nonsignificant change from baseline of –0.72 ± 0.80 ng/mL during 4 mo. Conclusions: Cholecalciferol (100 000 IU) is a safe, effective, and simple way to increase calcidiol concentrations. The dosing interval should be 2 mo to ensure continuous serum calcidiol concentrations above baseline.

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