IVF
Furosemide 20-40mg IV
Calcium chloride 10% 5-10mL IV or calcium gluconate 10% 15-30mL IV  over 5min
Consider hemodialysis for Mg >8 or poor renal function
Hypermagnesemia
Renal Failure
Hypomagnesemia
Lithium
Hyponatremia
Volume depletion
Hypophosphatemia
Rhabdo