EXPRESS: Acute vitamin d toxicosis in an adult cat

Case Summary: A four-year-old female spayed Domestic Shorthaired cat was presented to the Michigan State University Emergency service for evaluation of vomiting four days after exposure to vitamin D supplements. On intake, the patient was found to have an ionized hypercalcemia and an azotemia. The patient was hospitalized for calciuresis therapy. She was discharged and presented for a recheck evaluation and was then hospitalized a second time. Eventually the patient was discharged for at home care with subcutaneous fluids and oral medications due to financial constraints. Around fifty-two days post-exposure she was noted to have a persistently normal ionized calcium, and all medications were discontinued. Relevance/Novel Information: This case provides a unique example of acute vitamin D toxicity in a feline and a financially conservative approach in treating a toxicity with a significant half-life.