Efficacy of Nicardipine for Long-Term Therapy of Chronic Stable Angina

Area of Science:

• Cardiology
• Pharmacology

Background:

• Chronic stable angina management often relies on short-term clinical trials.
• Limited data exists on the long-term efficacy of antianginal therapies.

Purpose of the Study:

• To assess the long-term effectiveness and safety of nicardipine, a dihydro-pyridine calcium channel blocker, in patients with chronic stable angina.
• To evaluate nicardipine's impact on anginal symptoms and exercise parameters over a 1-year treatment period.

Main Methods:

• Open-label, 1-year treatment with nicardipine in patients with chronic stable angina.
• Dosage titration (20 mg, 30 mg, 40 mg tid) to control anginal symptoms.
• A subsequent 3-week double-blind, placebo-controlled crossover period for a subset of patients.

Main Results:

• Nicardipine effectively controlled anginal symptoms in a majority of patients over 1 year, with only 19% requiring additional nitrates.
• Significant reductions in anginal episodes and improvements in exercise parameters were observed during the open-label phase.
• Patients continuing nicardipine in the double-blind phase demonstrated significantly greater exercise time and time to angina onset compared to placebo.

Conclusions:

• Nicardipine provides effective and sustained symptom control for chronic stable angina over 1 year.
• Long-term nicardipine therapy significantly enhances exercise tolerance and delays angina onset compared to placebo.
• Nicardipine represents a valuable therapeutic option for the long-term management of chronic stable angina.