From Dog

Calcitriol (ergocalciferol, 1,25-dihydroxycholecalciferol, 1,25-dihydroxyvitamin D3) is a synthetic form of vitamin D[1].

Calcitriol causes increased calcium absorption from the gut.

This product is used for treatment of hypocalcemia associated with rickets and hypoparathyroidism[2].

Regular monitoring of blood calcium is important to avoid development of hypercalcemia.

Recommended dose in dogs is 25,000 – 50,000 U/day given orally[3].


  1. Dusso AS et al (1991) On the mechanisms for the selective action of vitamin D analogs. Endocrinology 128(4):1687-1692
  2. Peterson ME (1982) Treatment of canine and feline hypoparathyroidism. J Am Vet Med Assoc 181(11):1434-1436
  3. Diquélou A et al (2005) Hypocalcaemia due to nutritional calcium deficiency and hypoparathyroidism in an adult dog. Vet Rec 156(2):45-48