Hypomagnesemia is having a serum magnesium concentration of <1.3 mEq/L.
Patients with mild hypomagnesemia is asymptomatic and have usually a serum Mg >0.5 mmol/L. While those with moderate-severe hypomagnesemia, the patient is symptomatic and have serum Mg <5 mmol/L.
Hypermagnesemia signs and symptoms usually do not appear unless Mg >2 mmol/L (5 mg/dL). It rarely occurs and usually iatrogenic.


Mild Hypomagnesemia

  • Patient is usually asymptomatic
  • Serum Mg is usually >0.5 mmol/L (1.2 mg/dL)

Moderate-Severe Hypomagnesemia

  • Patient is usually symptomatic
  • Serum Mg is usually <0.5 mmol/L (1.2 mg/dL)

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