Hypomagnesemia

Background

Clinical Features

Differential Diagnosis

Causes of hypomagnesemia

Evaluation

  • Magnesium level
  • Also check:
    • Chemistry
    • Phosphate

Management

  • Serum level >1.7
    • No treatment
  • Serum level 1.2 - 1.7
    • Asymptomatic
      • Oral repletion with magnesium oxide 400mg PO
        • Magnesium oxide 400mg = 2g of MgSO4
    • Symptomatic (or no POs)
      • 2g MgSO4 IV over 1 hour
  • Serum level <1.2
    • 4g MgSO4 IV over 2 hours

See Also

  • Electrolyte Abnormalities (Main)
  • Magnesium

References

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