doxercalciferol, a parathyroid agent (calcium regulator). ▪ INDICATIONS: It is used to lower high parathyroid hormone levels in patients undergoing chronic kidney dialysis. ▪ CONTRAINDICATIONS: Known hypersensitivity to this drug, hyperphosphatemia, hypercalcemia, and vitamin D toxicity prohibit its use. ▪ ADVERSE EFFECTS: Adverse effects include drowsiness, headache, lethargy, nausea, diarrhea, vomiting, anorexia, dry mouth, constipation, cramps, metallic taste, myalgia, arthralgia, decreased bone development, polyuria, hypercalciuria, hyperphosphatemia, hematuria, and shortness of breath.