Vitamin D injections may trigger hypercalcemia, with symptoms including fatigue, weakness, lethargy, decreased appetite, nausea, vomiting, weight loss, headache, muscle pain, thirst, polyuria, confusion, and even coma. In severe cases, it can lead to arrhythmia, kidney and heart failure, and even be life-threatening.

Explore the differential diagnosis of neonatal hypocalcemia and its primary causes, providing professional medical information.