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Related Experiment Videos

Symptomatic hypomagnesemia associated with gentamicin therapy.

P Kes1, Z Reiner

  • 1Department of Nephrology, University Hospital, Dr. M. Stojanovic, Zagreb, Yugoslavia.

Magnesium and Trace Elements
|January 1, 1990
PubMed
Summary

Gentamicin therapy can cause rare but serious electrolyte imbalances, including low magnesium, calcium, and potassium. Higher cumulative doses of gentamicin correlate with increased risk of magnesium depletion and kidney wasting.

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Area of Science:

  • Nephrology
  • Clinical Pharmacology
  • Internal Medicine

Background:

  • Gentamicin is a widely used antibiotic.
  • Electrolyte disturbances are potential adverse effects of drug therapies.

Purpose of the Study:

  • To report symptomatic hypomagnesemia, hypocalcemia, and hypokalemia following gentamicin therapy.
  • To investigate the relationship between gentamicin dosage and electrolyte abnormalities.

Main Methods:

  • Case series of seven patients experiencing electrolyte disturbances.
  • Analysis of urinary excretion of magnesium and potassium.
  • Correlation analysis between cumulative gentamicin dose and serum magnesium levels.

Main Results:

  • All seven patients developed symptomatic hypomagnesemia, hypocalcemia, and hypokalemia.
  • Excessive urinary excretion of magnesium and potassium was observed.
  • Significant correlation found between cumulative gentamicin dose and serum magnesium (r=0.76) and renal magnesium wasting (r=0.89).

Conclusions:

  • Gentamicin can induce significant magnesium depletion, a rare but critical complication.
  • Risk is higher in older patients receiving prolonged, high-dose gentamicin therapy.
  • Monitoring electrolytes is crucial in patients on long-term gentamicin treatment.

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