Calcitriol is the active form of vitamin D3. Your vet prescribes it to treat various conditions affecting calcium and phosphorus metabolism in dogs.
How Calcitriol Affects Calcium and Phosphorus
Calcitriol increases calcium absorption from the intestines. It also promotes calcium reabsorption by the kidneys, meaning less calcium is lost in urine. Simultaneously, it encourages the release of calcium and phosphorus from bones. This carefully orchestrated process helps maintain healthy blood levels of both minerals.
Conditions Treated with Calcitriol
- Secondary hyperparathyroidism: This occurs when the parathyroid glands overproduce parathyroid hormone (PTH) in response to low blood calcium levels. Calcitriol helps regulate PTH production and calcium levels. Renal secondary hyperparathyroidism: This specific type is common in dogs with kidney disease, where the kidneys’ ability to activate vitamin D is compromised. Hypocalcemia: Low blood calcium levels. Calcitriol directly boosts calcium in the blood.
Administration and Monitoring
Calcitriol is typically administered orally, often as a liquid or capsule. Blood tests regularly monitor calcium and phosphorus levels to ensure the medication is working effectively and the dosage is correct. Your vet will adjust the dose based on these results. Frequent monitoring is critical because high blood calcium levels (hypercalcemia) can have serious consequences.
Potential Side Effects
Hypercalcemia (high blood calcium): This is the most significant potential side effect and requires immediate veterinary attention. Anorexia (loss of appetite) Lethargy Polyuria (increased urination) Polydipsia (increased thirst)
Important Note
Calcitriol is a powerful medication. Always follow your veterinarian’s instructions precisely. Never administer medication without consulting your vet. Regular monitoring is key to ensuring your dog’s safety and treatment success.
