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What, if anything, is controversial about calcium antagonists?
1Department of Internal Medicine, Ochsner Clinic and Alton Ochsner Medical Foundation, New Orleans, Louisiana 70121, USA.
American Journal of Hypertension
|December 1, 1996
Summary
Recent studies question calcium antagonist safety for hypertension and post-heart attack patients. However, newer long-acting formulations are safe and effective for heart disease and blood pressure management.
Area of Science:
- Cardiology
- Pharmacology
- Clinical Trials
Background:
- Recent publications have raised concerns regarding the safety and efficacy of calcium antagonists, particularly in hypertension and post-myocardial infarction patients.
- These concerns stem from retrospective studies suggesting paradoxical increases in heart attack and mortality rates.
- However, these studies have methodological limitations and are based on older, short-acting formulations.
Purpose of the Study:
- To address the safety and efficacy concerns surrounding calcium antagonists.
- To evaluate the role of newer, long-acting calcium antagonists in cardiovascular disease management.
- To provide an updated perspective on the use of calcium antagonists in hypertension and heart conditions.
Main Methods:
- Review of recent publications and meta-analyses questioning calcium antagonist safety.
- Analysis of methodological drawbacks in cited retrospective studies (meta-analysis, case-control, cohort).
- Examination of evidence from recent clinical trials (e.g., PRAISE, VHeFT-III, DEFIANT II, APSIS, STONE) and ongoing trials (e.g., ALLHAT, INSIGHT, HOT, SYST-EUR, STOP II, NORDIL).
Main Results:
- Retrospective studies cited have significant limitations, including data errors, borderline significance, outdated drug information, and inadequate patient management.
- Recent trials with newer, long-acting calcium antagonists demonstrate their safety and efficacy across a spectrum of heart diseases.
- Ongoing trials are expected to provide further morbidity and mortality data for hypertension management.
Conclusions:
- Concerns regarding calcium antagonist safety are largely based on flawed studies of short-acting agents.
- Newer, long-acting calcium antagonists are safe and effective for lowering blood pressure and managing symptomatic angina.
- Current evidence supports the continued use of long-acting calcium antagonists in patients with cardiovascular conditions.