the antianginal and anti-ischemic effect of isosorbide dinitrate ( isdn ) , 120 mg once daily , and nifedipine , 20 mg twice daily , both in slow-release formulations , were compared in 17 patients with variant angina pectoris in a randomized , double-blind trial .
C0028066
nifedipine
C0002963
variant angina pectoris