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  • Title: Antianginal and anti-ischemic efficacy of nicorandil in comparison with isosorbide-5-mononitrate and isosorbide dinitrate: results from two multicenter, double-blind, randomized studies with stable coronary heart disease patients.
    Author: Döring G.
    Journal: J Cardiovasc Pharmacol; 1992; 20 Suppl 3():S74-81. PubMed ID: 1282180.
    Abstract:
    The purpose of the two double-blind studies summarized in this article was to compare the antianginal and anti-ischemic effects of nicorandil with those of two different nitrate preparations. A total of 129 patients with stable New York Heart Association functional class II or III coronary heart disease were enrolled in the studies. Ninety-five patients received nicorandil, 34 received isosorbide dinitrate (ISDN), and 63 received isosorbide-5-mononitrate (MN). In study 1, nicorandil was compared with MN in a crossover design with 54 protocols eligible for efficacy assessment of MN and 52 eligible for nicorandil, respectively. Twenty milligrams of nicorandil and 20 mg MN administered b.i.d. for 4 weeks were equally effective in the treatment of stress-induced angina. Both drugs prolonged bicycle exercise tolerance and reduced weekly anginal attack rates. In study 2, nicorandil and ISDN were administered to two parallel groups of patients at a dose of 10 mg t.i.d. for 2 weeks and then 20 mg t.i.d. for 4 weeks. Under the assumption that the repetitive administration of nitrates with short dosing intervals might induce the development of tolerance to the nitrate mechanism of action, the t.i.d.-dosing regimen had been chosen in this study. Thirty-two protocols from those receiving nicorandil and 34 protocols from those receiving ISDN were eligible for efficacy assessment. Both drugs increased exercise capacity and reduced ST-segment depression at identical work loads with no significant difference between groups (p > 0.05). For both drugs, the higher doses were more effective than the lower doses. tolerance to the nitrate mechanism of action did not develop with either drug.(ABSTRACT TRUNCATED AT 250 WORDS)
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