🔴 HIGH — Dangerous
Why is it risky?
Vitamin D3 disrupts calcium and phosphorus regulation. Excess D3 causes dangerous hypercalcemia, which can calcify soft tissue and lead to kidney failure.
Affected Systems
Digestive · Kidneys · Cardiovascular
Symptoms
Reduced appetite, lethargy, weakness, vomiting, increased thirst and urination. Onset is delayed, typically 12–36 hours after ingestion.
What To Do
Vet immediately, even before symptoms appear, blood calcium needs to be monitored for several days.
Notes
Most common sources are cholecalciferol-based rat/mouse poison and human multivitamin supplements left within reach.
Sources
→ Merck Veterinary Manual | https://www.merckvetmanual.com/toxicology/rodenticide-poisoning/cholecalciferol-vitamin-d3-poisoning-in-animals
→ VCA Animal Hospitals | https://vcahospitals.com
⚠️ Disclaimer: The information on SafeCatBase is for educational purposes only and does not replace professional veterinary advice. Always consult a qualified veterinarian for any health concerns about your cat.