Hypomagnesaemia

Last updated: Tuesday, 14, December, 2010
CausesAppropriate Tests

Hypomagnesaemia should be suspected in patients with hypocalcaemia and/or hypokalemia not responding to therapy.

Magnesium; urine - magnesium.

Prolonged intravenous therapy
Gastrointestinal lossMagnesium faeces, if documentation required.

Alcoholism

Malabsorption

Genetic magnesium malabsorption

Renal loss, including

Diabetic ketoacidosis

Hypercalcaemia

Drug induced, including

  • Diuretics
  • Cis-platinum
  • Gentamicin
  • Prolonged laxative abuse
  • Cyclosporin
Malnutrition