Duration and extent of antianginal effects of a sustained-release formulation of nifedipine in angina

M. Yokota, F. Saito, Hideo Izawa, T. Matsunami, J. Yoshida, H. Inagaki, I. Sotobata

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Twenty-four patients with chronic stable exertional angina pectoris were randomized in a double-blind, placebo-controlled, crossover trial to assess the efficacy and durability of a newly developed sustained-release formulation of nifedipine (nifedipine CC) in a single 40-mg oral dose. Symptom-limited graded treadmill exercise tests were performed just before and at 4, 7, and 24 h after a single administration of the drug or the placebo was given. Exercise tolerance at 4, 7, and 24 h after the drug were compared with the corresponding placebo values. Data could be analysed for 19 patients. Maximal exercise time time to the onset of angina and time to 1 mm ST segment depression were significantly greater at 4, 7, and 24 h after nifedipine CC than at baseline or with the corresponding placebo. The average maximal exercise time was significantly increased by 72, 76 and 37 s at 4, 7, and 24 h. Rate-pressure product at rest and at peak exercise showed significant changes only at 24 h compared with placebo (both P < 0.05). The maximal increase in exercise tolerance was most marked at 7 h after nifedipine CC at which time plasma drug concentration was 99.4 ± 14.0 ng.ml -1 . Thus, in patients with chronic stable exertional angina pectoris nifedipine CC showed a prolonged improvement in exercise tolerance up to 24 h after a single oral administration.

Original languageEnglish
Pages (from-to)965-970
Number of pages6
JournalEuropean Heart Journal
Issue number7
Publication statusPublished - 01-01-1994
Externally publishedYes


All Science Journal Classification (ASJC) codes

  • Cardiology and Cardiovascular Medicine

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