Question 1

What is Vitamin D used for?

Accepted Answer

Vitamin D is indicated for: CKD secondary hyperparathyroidism, Hypoparathyroidism, Metabolic bone disease (with UVB).

Question 2

What routes can Vitamin D be administered by?

Accepted Answer

Available routes: PO.

Question 3

Which species have cited Vitamin D dosing data?

Accepted Answer

Vitamin D dosing in the ExoticRx formulary covers 3 species: Bearded Dragon, Cat (Domestic), Dog (Domestic).

Question 4

Is Vitamin D a controlled substance?

Accepted Answer

Vitamin D is not federally scheduled as a controlled substance, but is veterinary prescription only in most jurisdictions.

Question 5

What are the warnings or contraindications for Vitamin D?

Accepted Answer

Calcitriol: used for renal secondary hyperparathyroidism and hypoparathyroidism. Narrow therapeutic index — hypercalcemia risk. Monitor ionized calcium frequently. Do not confuse calcitriol with cholecalciferol.

Question 6

What are the side effects of Vitamin D?

Accepted Answer

Calcitriol: used for renal secondary hyperparathyroidism and hypoparathyroidism. Narrow therapeutic index — hypercalcemia risk. Monitor ionized calcium frequently. Do not confuse calcitriol with cholecalciferol.

Question 7

How does Vitamin D work?

Accepted Answer

Active form (calcitriol) binds VDR promoting intestinal calcium and phosphorus absorption, bone mineralization, and parathyroid hormone regulation.

Species	Route	Dose	Frequency	Evidence	Source
Dog (Domestic)	PO	0.02–0.03 mcg/kg calcitriol	q24h	Moderate	Plumb's Veterinary Drug Handbook, 9th Ed
Cat (Domestic)	PO	0.02–0.03 mcg/kg calcitriol	q24h	Moderate	Plumb's Veterinary Drug Handbook, 9th Ed

Vitamin D

Drug Class

Routes

Indications

Mechanism of Action

Side effects & warnings

Species with Vitamin D dosing data (3 dose rules)

Evidence levels across 3 dose rules

Backed by 2 published primary sources

Sample dosing (2 of 3 cited rules)

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