Treat the underlying cause
Restrict calcium phosphate intake
IV Normal Saline (if normal renal fx)
Acetazolamide (500mg IV q6hr) - if normal renal function
Phosphate Binder - Aluminum hydroxide (50-150mg/kg PO q4-6h) - limited effect
Dialysis if refractory
Hyperphosphatemia
Calciphylaxis
Hypophosphatemia
Vitamin D intoxication
Hypocalcemia
Tumor lysis syndrome
Hypokalemia
Laxative 