From Dog

Dihydrotachysterol is a synthetic vitamin D analog.

In dogs, this drug is used for treatment of hypocalcemia associated with milk fever and primary hypoparathyroidism[1].

It is usually given in combination with oral calcium supplementation for long-term maintenance of normal serum calcium concentration[2].

Careful regulation of blood calcium should be performed by regular blood testing to prevent hypercalcemia[3].

Recommended dose rate is 0.03 - 0.06 mg/kg given orally every 24 hours.


  1. Bruyette DS & Feldman EC (1988) Primary hypoparathyroidism in the dog. Report of 15 cases and review of 13 previously reported cases. J Vet Intern Med 2(1):7-14
  2. Freeman LM et al (1994) Fanconi's syndrome in a dog with primary hypoparathyroidism. J Vet Intern Med 8(5):349-354
  3. Fox J & Heath H (1984) Effect of plasma calcium concentration on the metabolic clearance rate of calcitonin in the dog. Horm Metab Res 16(1):46-49