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Calcium antagonists and the kidney.

M Chellingsworth1, M J Kendall

  • 1Department of Therapeutics and Clinical Pharmacology, Medical School, University of Birmingham, UK.

Journal of Human Hypertension
|June 1, 1987
PubMed
Summary

Calcium antagonists are safe for patients with kidney issues and heart disease. These drugs help manage hypertension and ischemic heart conditions, even with impaired renal function.

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Area of Science:

  • Nephrology
  • Cardiology
  • Pharmacology

Background:

  • Calcium antagonists are widely prescribed for hypertension and ischemic heart disease.
  • Patients with these conditions frequently exhibit renal impairment, necessitating an understanding of drug effects on the kidney.
  • The impact of calcium antagonists on renal function in patients with renal impairment is a critical clinical consideration.

Purpose of the Study:

  • To investigate the effects of calcium antagonists on renal haemodynamics and function in patients with renal impairment.
  • To explore the mechanisms behind the natriuretic and diuretic effects of calcium antagonists.
  • To assess the safety and utility of calcium antagonists in patients with co-existing hypertension or ischemic heart disease and renal impairment.

Main Methods:

  • Review of existing literature on calcium antagonist use in patients with renal impairment.
  • Analysis of studies examining renal haemodynamics and function in response to calcium antagonists.
  • Pharmacokinetic evaluation of calcium antagonists in patients with varying degrees of renal failure.

Main Results:

  • Calcium antagonist effects on renal haemodynamics are variable, dose-dependent, and influenced by patient status.
  • Calcium antagonists induce natriuresis and diuresis through incompletely understood mechanisms, potentially independent of direct renal haemodynamic effects.
  • The diuretic effect may mitigate edema associated with vasodilator therapy.
  • Peripheral renin activity responses are unpredictable, influenced by direct and haemodynamic factors.
  • Calcium antagonist pharmacokinetics are largely unaffected by renal failure due to hepatic metabolism.

Conclusions:

  • Calcium antagonists demonstrate safety and utility in treating hypertension and ischemic heart disease in patients with renal impairment.
  • Understanding the variable renal effects is crucial for optimizing therapy.
  • Further research into the precise mechanisms of diuretic and natriuretic effects is warranted.

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