Comparative Pharmacology
Head-to-head clinical analysis: CALCIJEX versus CALCITRIOL.
Peer-Reviewed Evidence
Head-to-head clinical analysis: CALCIJEX versus CALCITRIOL.
CALCIJEX vs CALCITRIOL
Comparing the clinical profiles, pharmacokinetic behaviors, and safety indices of these two therapeutic agents.
Calcitriol, the active form of vitamin D, binds to the vitamin D receptor (VDR) in target tissues, increasing intestinal absorption of calcium and phosphate, promoting renal tubular reabsorption of calcium, and stimulating bone resorption. It also suppresses parathyroid hormone (PTH) synthesis and secretion via negative feedback.
Calcitriol, the active form of vitamin D, binds to vitamin D receptors (VDR) in target tissues, modulating gene transcription. It increases intestinal calcium and phosphate absorption, enhances renal tubular reabsorption of calcium, and promotes bone mineralization by stimulating osteoblast activity.
Intravenous: 0.5 mcg three times per week during dialysis; may be increased by 0.25-0.5 mcg at 2-4 week intervals. Oral: 0.25 mcg daily; may be increased to 0.5 mcg daily.
0.25-0.5 mcg orally once daily, may increase by 0.25 mcg/day at 4-8 week intervals; maximum 2 mcg/day.
None Documented
None Documented
Clinical Note
moderateCalcitriol + Sulfisoxazole
"The metabolism of Sulfisoxazole can be decreased when combined with Calcitriol."
Clinical Note
moderateCalcitriol + Erythromycin
"The metabolism of Erythromycin can be decreased when combined with Calcitriol."
Clinical Note
moderateCalcitriol + Cyclosporine
"The metabolism of Cyclosporine can be decreased when combined with Calcitriol."
Clinical Note
moderateCalcitriol + Fluconazole
Terminal elimination half-life ranges from 5 to 10 hours in patients with normal renal function. In renal impairment, half-life may be prolonged up to 20 hours or more.
5–8 hours (terminal) in normal renal function; prolonged up to 18–24 hours in chronic kidney disease (CKD) due to reduced clearance.
Primarily hepatic (biliary-fecal) elimination; approximately 2-4% excreted unchanged in urine. Small amount undergoes enterohepatic recirculation.
Renal (fecal after biliary excretion of metabolites): ~10% unchanged in urine; ~70% as metabolites in feces via bile.
Category C
Category A/B
Vitamin D Analog
Vitamin D Analog
"The metabolism of Fluconazole can be decreased when combined with Calcitriol."