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  • Title: A cross-over study comparing the efficacy of a combination of atenolol and nifedipine at different doses in angina pectoris.
    Author: Metcalfe MJ, Jennings K.
    Journal: Curr Med Res Opin; 1995; 13(5):251-6. PubMed ID: 7555033.
    Abstract:
    Although the combined administration of atenolol and nifedipine has been shown to be effective in the treatment of angina pectoris the optimum dosage level of the combination has not yet been established. A double-blind, randomly assigned three period cross-over study was carried out therefore to investigate the effects of different daily doses of a fixed combination of 50 mg atenolol and 20 mg sustained-release nifedipine per capsule. Twenty-one patients with stable angina pectoris were randomized, after a 2-week run-in period, to receive treatment for 4 weeks with either 1 capsule twice daily (A), 2 capsules in the morning and 1 in the evening (B), or 2 capsules twice daily (C). A treadmill exercise tolerance test was performed together with a clinical evaluation after the run-in and each of the three treatment periods. Analysis of the results from the 19 patients who completed the study revealed there were no significant differences between the three treatment periods with respect to the general exercise test parameters, number of anginal attacks per week or nitrate consumption. Few side-effects were reported and were only mild in nature. On these findings, therefore, there would appear to be little justification for increasing the dose of the combination above the equivalent of treatment A.
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