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The use of calcium antagonists in patients with renal failure
K H Rahn1, L M van Bortel, J M Mooy
1Department of Medicine, University of Limburg, Maastricht, The Netherlands.
Insights
Calcium antagonists effectively treat high blood pressure and related conditions. Patients with renal failure can safely use these drugs, including verapamil, diltiazem, nifedipine, and nitrendipine, at standard doses.
Area of Science:
- Pharmacology
- Nephrology
- Cardiology
Background:
- Calcium antagonists are widely prescribed for hypertension, angina, and arrhythmias.
- Their use is expanding in patients with renal failure due to demonstrated blood pressure-lowering effects.
Purpose of the Study:
- To evaluate the safety and efficacy of calcium antagonists in patients with renal insufficiency.
- To determine if dosage adjustments are necessary for common calcium antagonists in renal failure.
Main Methods:
- Review of pharmacokinetic data for verapamil, nitrendipine, diltiazem, and nifedipine in renal failure.
- Analysis of studies involving repeated administration of these calcium antagonists.
Main Results:
- Pharmacokinetics of verapamil, nitrendipine, and diltiazem are generally unaffected by renal failure.
- Nifedipine's pharmacokinetics present a more complex profile in renal impairment.
- Repeated administration studies indicate consistent dosing is feasible for all four agents.
Conclusions:
- Calcium antagonists can be administered to renal failure patients at the same dosages as those with normal renal function.
- Verapamil, diltiazem, nifedipine, and nitrendipine are suitable treatment options for hypertension in renal insufficiency.
Abstract:
Calcium antagonists are now frequently used for the treatment of high blood pressure, angina pectoris and cardiac arrhythmias. Increasingly, these drugs are also given to patients with renal failure, since several studies have demonstrated that calcium antagonists lower blood pressure in patients with renal hypertension and renal insufficiency. Relevant pharmacokinetic parameters for verapamil, nitrendipine and diltiazem are not altered in renal failure. The situation is more complex in the case of nifedipine. However, studies with repeated administration have demonstrated that the calcium antagonists verapamil, diltiazem, nifedipine and nitrendipine can be given in the same doses to patients with renal failure as to patients with normal renal function.