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Questions & Answers
Side Effects & Adverse Reactions
Since calcitriol is the most potent metabolite of vitamin D available, prescription-based doses of vitamin D and its derivatives should be withheld or used with caution during treatment to avoid the risk of hypercalcemia.
A non-aluminum phosphate-binding compound should be used to control serum phosphorus levels in patients undergoing dialysis.
Overdosage of any form of vitamin D is dangerous (see also OVERDOSAGE). Progressive hypercalcemia due to overdosage of vitamin D and its metabolites may be so severe as to require emergency attention. Chronic hypercalcemia can lead to generalized vascular calcification, nephrocalcinosis, and other soft-tissue calcification. The serum calcium times phosphate (Ca x P) product should not be allowed to exceed 70 mg2/dL2. Radiographic evaluation of suspect anatomical regions may be useful in the early detection of this condition.
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FDA Safety Alerts
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There is currently no manufacturer warning information available for this drug.
FDA Labeling Changes
There are currently no FDA labeling changes available for this drug.
Calcijex (calcitriol injection) is indicated in the management of hypocalcemia in patients undergoing chronic renal dialysis. It has been shown to significantly reduce elevated parathyroid hormone levels. Reduction of PTH has been shown to result in an improvement in renal osteodystrophy.
There is currently no drug history available for this drug.
Calcijex (calcitriol injection) is synthetically manufactured calcitriol and is available as a sterile, isotonic, clear, colorless to yellow, aqueous solution for intravenous injection. Calcijex is available in 1 mL ampuls. Each 1 mL contains calcitriol, 1 mcg; Polysorbate 20, 4 mg; sodium ascorbate 2.5 mg added. May contain hydrochloric acid and/or sodium hydroxide for pH adjustment. pH is 6.5 (5.9 to 7.0). Contains no more than 1 mcg/mL of aluminum.
Calcitriol is a crystalline compound which occurs naturally in humans. It is soluble in organic solvents but relatively insoluble in water.
Calcitriol is chemically designated (5Z,7E)-9, 10-secocholesta-5,7,10(19)-triene-1α,3β,25-triol and has the following structural formula:
Molecular Formula: C27H44O3
The other names frequently used for calcitriol are 1α,25-dihydroxycholecalciferol, 1α,25-dihydroxyvitamin D3, 1,25-DHCC, 1,25(OH)2D3 and 1,25-diOHC.