Vitamin D

Question 1

pharmacologic classification

Answer 1

bone resorption inhibitor

Question 2

pregnancy category

Answer 2

C

Question 3

mechanism of action

Answer 3

elevates serum calcium levels

decreases bone resorption and demineralization

Question 4

two types

Answer 4

D2 ergocalciferol drug form

D3 cholecalciferal produced by body in response to sunlight

Question 5

indications

Answer 5

hypocalcemia

hypoparathyroidism

Question 6

contraindications

Answer 6

hypercalcemia

vitamin D toxicity

Question 7

precautions

Answer 7

renal failure

Question 8

deficiency

Answer 8

rickets, osteoporosis, thought to play role in immune disorders, cancers, diabetes

Question 9

drug interactions

Answer 9

thiazide diuretics
digoxin
magnesium antacids or supplements
orlistat
corticosteroids

Question 10

adverse effects

Answer 10

none at normal doses

Question 11

serious adverse effects

Answer 11

hypercalcemia symptoms including bone pain, lethargy, anorexia, nausea, vomiting, increased urination, hallucinations, dysrhythmias

Question 12

responsibilities

Answer 12

assess sclera, skin pigment, bowel movements, and lab results for liver function; assess for adverse effects of Vit D therapy; monitor serum calcium, magnesium, alkaline phosphatase, creatinine, and phosphate levels; monitor for signs of hypercalcemia

Question 13

teaching

Answer 13

consume dietary sources of vitamin D; take D exactly as directed; take D w/ meals; report signs of excessive D; report yellowing of skin or eyes, pale bowel movements, or darkened urine