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Octreotide and potassium homeostasis

R O Brown1, R N Dickerson, J F Mouser

  • 1Department of Clinical Pharmacy, University of Tennessee, Memphis 38163, USA.

Pharmacotherapy
|May 1, 1997
PubMed
Summary

Octreotide, a somatostatin analog, did not induce hyperkalemia in endotoxemic rats receiving intravenous potassium. This study indicates octreotide does not disrupt potassium homeostasis in critical illness models.

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Area of Science:

  • Endocrinology
  • Nephrology
  • Critical Care Medicine

Background:

  • Somatostatin infusion is known to cause hyperkalemia in healthy subjects and some animal models.
  • Octreotide, a synthetic somatostatin analog, is used clinically, necessitating an understanding of its effects on electrolyte balance.

Purpose of the Study:

  • To investigate the effect of octreotide on potassium homeostasis in a model of critical illness.
  • To determine if there is a dose-response relationship between octreotide administration and potassium levels.

Main Methods:

  • Sixty-six male Sprague-Dawley rats were assigned to parenteral nutrition (PN) alone, PN with lipopolysaccharide (LPS) infusion, or PN with LPS plus varying doses of octreotide (10, 100, 1000 µg/kg/day) for 48 hours.
  • Serum potassium, fractional excretion of potassium, and serum creatinine were measured.

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  • Data were analyzed using ANOVA and Duncan's multiple range test.

    • Main Results:

    • Serum potassium concentrations remained within the normal range for rats across all treatment groups, with no significant differences observed.
    • No significant differences were found in fractional excretion of potassium or serum creatinine concentrations among the groups.
    • Octreotide administration, even at escalating dosages, did not lead to hyperkalemia in endotoxemic rats receiving a constant rate of intravenous potassium via PN.

    Conclusions:

    • Octreotide does not appear to cause hyperkalemia in endotoxemic rats when potassium is supplied intravenously at a constant rate.
    • These findings suggest that octreotide may not disrupt potassium homeostasis in the context of critical illness and intravenous potassium administration.