Colecalciferol: Hypercalcaemic crisis following misuse.

A 58-year-old woman experienced a hypercalcaemic crisis after misusing colecalciferol. She presented with altered mental status and somnolence, and laboratory tests revealed severe hypercalcaemia and other abnormalities. The woman underwent emergent haemodialysis and showed gradual improvement in her condition. She reported taking over-the-counter colecalciferol at a high dosage for several months. Her calcium levels and renal function improved, but her 25-hydroxyvitamin D levels remained elevated. [Extracted from the article]