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Details

Stereochemistry ABSOLUTE
Molecular Formula C27H44O2
Molecular Weight 400.6371
Optical Activity UNSPECIFIED
Defined Stereocenters 5 / 5
E/Z Centers 2
Charge 0

SHOW SMILES / InChI
Structure of CALCIFEDIOL ANHYDROUS

SMILES

[H][C@@]1(CC[C@@]2([H])\C(CCC[C@]12C)=C\C=C3\C[C@@H](O)CCC3=C)[C@H](C)CCCC(C)(C)O

InChI

InChIKey=JWUBBDSIWDLEOM-DTOXIADCSA-N
InChI=1S/C27H44O2/c1-19-10-13-23(28)18-22(19)12-11-21-9-7-17-27(5)24(14-15-25(21)27)20(2)8-6-16-26(3,4)29/h11-12,20,23-25,28-29H,1,6-10,13-18H2,2-5H3/b21-11+,22-12-/t20-,23+,24-,25+,27-/m1/s1

HIDE SMILES / InChI

Molecular Formula C27H44O2
Molecular Weight 400.6371
Charge 0
Count
MOL RATIO 1 MOL RATIO (average)
Stereochemistry ABSOLUTE
Additional Stereochemistry No
Defined Stereocenters 5 / 5
E/Z Centers 2
Optical Activity UNSPECIFIED

Description

Calcifediol (25-Hydroxyvitamin D3 or 25-hydroxycholecalciferol) is a biologically active vitamin D3 metabolite. It is concluded that the liver is the major if not the only physiologic site of hydroxylation of vitamin D3 into calcifediol. Calcifediol is a prohormone of the active form of vitamin D3, calcitriol (1,25-dihydroxyvitamin D3). Calcifediol is converted to calcitriol by cytochrome P450 27B1 (CYP27B1), also called 1-alpha hydroxylase, primarily in the kidney. Calcitriol binds to the vitamin D receptor in target tissues and activates vitamin D responsive pathways that result in increased intestinal absorption of calcium and phosphorus and reduced parathyroid hormone synthesis. RAYALDEE (calcifediol) extended-release capsules is indicated for the treatment of secondary hyperparathyroidism in adult patients with stage 3 or 4 chronic kidney disease.

CNS Activity

Originator

Approval Year

Targets

Primary TargetPharmacologyConditionPotency

Conditions

ConditionModalityTargetsHighest PhaseProduct
Primary
RAYALDEE
Primary
CALDEROL
Primary
CALDEROL
Primary
CALDEROL

Cmax

ValueDoseCo-administeredAnalytePopulation
73.2 ng/mL
20 mg 1 times / day steady-state, oral
CALCIFEDIOL plasma
Homo sapiens

AUC

ValueDoseCo-administeredAnalytePopulation
1704.4 ng × h/mL
20 mg 1 times / day steady-state, oral
CALCIFEDIOL plasma
Homo sapiens

T1/2

ValueDoseCo-administeredAnalytePopulation
11 day
20 mg 1 times / day steady-state, oral
CALCIFEDIOL plasma
Homo sapiens

Funbound

ValueDoseCo-administeredAnalytePopulation
2%
20 mg 1 times / day steady-state, oral
CALCIFEDIOL plasma
Homo sapiens

Doses

AEs

Overview

CYP3A4CYP2C9CYP2D6hERG

OverviewOther

Other InhibitorOther SubstrateOther Inducer


Drug as victim

PubMed

Sample Use Guides

In Vivo Use Guide
The initial dose of RAYALDEE (calcifediol) extended-release capsules is 30 mcg administered orally once daily at bedtime. Serum calcium should be below 9.8 mg/dL before initiating treatment. Monitor serum calcium, phosphorus, 25-hydroxyvitamin D and intact parathyroid hormone (PTH) 3 months after starting therapy or changing dose. Increase the dose to 60 mcg once daily after 3 months if intact PTH is above the treatment goal. Ensure serum calcium is below 9.8 mg/dL, phosphorus is below 5.5 mg/dL and 25-hydroxyvitamin D is below 100 ng/mL before increasing the dose. Suspend dosing if intact PTH is persistently abnormally low, serum calcium is consistently above the normal range or serum 25­ hydroxyvitamin D is consistently above 100 ng/mL
Route of Administration: Oral
In Vitro Use Guide
Vitamin D metabolites down-regulated stimulated IL-8 only in those hyperinflammatory monocyte-derived macrophages, and only when used at high doses (>100 nM for Calcifediol).
Substance Class Chemical
Record UNII
T0WXW8F54E
Record Status Validated (UNII)
Record Version