using a randomized , double-blind , placebo-controlled protocol , the effects of nadolol alone and nadolol in combination with isosorbide dinitrate and nifedipine were compared , in low and high doses , on antianginal efficacy , respiratory functions and arterial blood oxygen saturation ( sao2 ) in 19 patients with stable angina pectoris .
C0028066
nifedipine
C0340288
stable angina