a prospective double-blind , crossover trial of isdn , 40 to 120 mg/day , and nifedipine , 40 to 120 mg/day , in 19 patients with variant angina and various degrees of coronary atherosclerosis showed that although both agents were equally effective in controlling angina of vasospastic origin , some patients responded better to one or the other drug .
C0028066
nifedipine
C0002963
angina