Cat · Felis catus · typical adult weight 2.50–7.00 kg
Vitamin D is dosed at 0.02–0.03 mcg/kg calcitriol PO q24h in cats, per Verified against Plumb's Veterinary Drug Handbook, 10th Ed, p.198 (2026-08-01).. Vitamin D is used in cats for CKD secondary hyperparathyroidism. Routes documented in cats: PO. A typical adult cat weighs 2.50–7.00 kg. ExoticRx lists 1 cited dose rule for Vitamin D in cats, drawn from published veterinary references. Verify against current literature before clinical use.
US trade names: Calcitriol, Cholecalciferol
| Route | Dose | Frequency | Duration | Indication | Evidence | Source |
|---|---|---|---|---|---|---|
| PO | 0.02–0.03 mcg/kg calcitriol | q24h | Long-term | CKD secondary hyperparathyroidism | Moderate | Verified against Plumb's Veterinary Drug Handbook, 10th Ed, p.198 (2026-08-01). |
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Active form (calcitriol) binds VDR promoting intestinal calcium and phosphorus absorption, bone mineralization, and parathyroid hormone regulation.
Calcitriol: used for renal secondary hyperparathyroidism and hypoparathyroidism. Narrow therapeutic index — hypercalcemia risk. Monitor ionized calcium frequently. Do not confuse calcitriol with cholecalciferol.
Species-specific contraindications and adverse-reaction reports for cats may differ from canine / feline reference data — consult the primary citations listed with each rule.
Vitamin D dose range in cats, with cited source references: PO 0.02–0.03 mcg/kg calcitriol q24h. Reference ranges from cited sources — verify against current literature before clinical use.
Documented routes for Vitamin D in cats: PO.
Cited course lengths for Vitamin D in cats include: Long-term. Duration depends on the indication — match it to the specific dose rule in the table above.
Vitamin D is indicated in cats for: CKD secondary hyperparathyroidism.
These are general warnings for Vitamin D across species; consult the cat dosing table above for species-specific guidance. Calcitriol: used for renal secondary hyperparathyroidism and hypoparathyroidism. Narrow therapeutic index — hypercalcemia risk. Monitor ionized calcium frequently. Do not confuse calcitriol with cholecalciferol.
Why a species-specific page? Vitamin D pharmacokinetics differ across species: dose ranges, intervals, and route preferences are not interchangeable. Cross-extrapolation from canine doses is unsafe in cats — the rules above are the citations specific to this species, not generic recommendations.
Sourced from published veterinary references; awaiting credentialed clinical reviewer. See our editorial process. Reference only — not veterinary advice.