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A dose-response study on metoprolol in angina pectoris
Annals of Clinical Research
|January 1, 1981
Summary
Higher doses of metoprolol significantly improved exercise capacity and delayed pain onset in stable angina patients. Most patients preferred the 100 mg twice-daily dose in a follow-up study.
Area of Science:
- Cardiology
- Pharmacology
Background:
- Stable angina pectoris management often involves beta-blockers.
- Metoprolol is a commonly prescribed beta-blocker for angina.
Purpose of the Study:
- To compare the efficacy of single oral doses of metoprolol (50, 100, and 200 mg) in patients with stable angina.
- To assess patient preference for different metoprolol dosages in a follow-up study.
Main Methods:
- A randomized crossover study involving 23 patients with stable angina.
- Exercise tolerance tests were conducted 1.5 hours after single metoprolol doses.
- A follow-up study assessed patient preference for 100 mg twice-daily versus 200 mg twice-daily metoprolol.
Main Results:
- Single doses of 100 mg and 200 mg metoprolol significantly reduced heart rate during exercise compared to 50 mg.
- Systolic blood pressure during exercise was lower with 200 mg metoprolol.
- Total work performed and time to angina onset improved with higher metoprolol doses.
- A majority of patients preferred the 100 mg twice-daily regimen over 200 mg twice-daily.
Conclusions:
- Metoprolol demonstrates dose-dependent improvements in exercise capacity for stable angina patients.
- 100 mg twice-daily metoprolol appears to be a preferred and effective long-term treatment option.