a study of the causes of tolerance to antianginal effect of nifedipine++ , conducted in 12 patients with angina of effort , examined serum pharmacokinetics of nifedipine++ and its primary metabolite ( puridine analogue of nifedipine++ ) , after a single 20 or 30 mg dose and at the end of a treatment course ( 20-40 mg 3-4 times daily for 2 to 6 months ) .
C1874267
antianginal
C0002962
angina of effort