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ergocalciferol (vitamin D2, Drisdol)
Indications:
1) treatment of refractory rickets
2) familial hypophosphatemia & hypoparathyroidism
- renal osteodystrophy
- hypocalcemia [4]
3) prophylaxis for fracture in the elderly [3]
- osteoporosis
Dosage:
1) 1 mg = 40,000 IU
2) RDA: 400 IU/day
3) rickets: 12,000-500,000 IU/day
4) hypoparathyroidism:
a) 10,000-80,000 IU/day, plus
b) 500 mg of calcium 6 times/day
5) hypophosphatemia:
a) 10,000-80,000 IU/day, plus
b) 1-2 g of phosphate/day
6) IM therapy is recommended for patients with malabsorption
Capsule: 50,000 IU (1.25 mg).
Adverse effects:
1) not common (1-10%)
- hypotension, cardiac arrhythmias, irritability, headache, nausea/vomiting, bone pain, hypotension, pruritus, anorexia, pancreatitis, muscle pain, conjunctivitis, photophobia, polyuria, polydypsia, metallic taste
2) uncommon (< 1%)
- weight loss, psychosis
Mechanism of action: see vitamin D
Interactions
drug interactions
Specific
25-hydroxyvitamin D2; 25-hydroxyergocalciferol; ercalcidiol; 25-hydroxycalciferol
General
vitamin D
Properties
Database Correlations
PUBCHEM cid=3249
References
- Drug Information & Medication Formulary, Veterans Affairs,
Central California Health Care System, 1st ed., Ravnan et al
eds, 1998
- Kaiser Permanente Northern California Regional Drug
Formulary, 1998
- Journal Watch 24(1):7, 2004
Journal Watch 23(8):66, 2003
Trivedi DP et al, BMJ 326:469, 2003
PMID: 12609940
http://bmj.com/cgi/content/full/326/2387/469
- Deprecated Reference
Component-of
alpha tocopherol/ascorbate/biotin/biotin/cobalamin/ergocalciferol/folic acid/multivitamin/nicotinamide/panthenol/pyridoxine/riboflavin/thiamine/vitamin a/vitamin k
alpha tocopheryl acetate/ascorbate/beta carotene/cobalamin/ergocalciferol/folic acid/nicotinic acid/pantothenate/pyridoxine/retinol/riboflavin/thiamine
calcium carbonate/ergocalciferol
calcium citrate/ergocalciferol
ergocalciferol/vitamin a