• American heart journal · May 1999

    Randomized Controlled Trial Multicenter Study Comparative Study Clinical Trial

    Antianginal efficacy of the combination of felodipine-metoprolol 10/100 mg compared with each drug alone in patients with stable effort-induced angina pectoris: a multicenter parallel group study. The TRAFFIC Study Group.

    • H Emanuelsson, K Egstrup, K Nikus, J Ellström, T Glud, C Pater, M Scheibel, A Tisell, K J Tötterman, and M Forsby.
    • Sahlgrenska Hospital, Göteborg, Sweden.
    • Am. Heart J. 1999 May 1; 137 (5): 854-62.

    ObjectiveThe primary objective of this randomized, double-blind, parallel group trial was to compare the antianginal and antiischemic efficacy of a combination tablet of felodipine-metoprolol 10/100 mg once daily with both drugs given separately once daily in patients with stable effort-induced angina pectoris. The secondary objective was to compare the tolerability of the 3 treatments.MethodsThe main criteria for inclusion were stable effort-induced angina pectoris for at least 2 months before the enrollment and a positive bicycle exercise test result. Patients were allocated to once-daily treatment with either felodipine-metoprolol 10/100 mg, felodipine 10 mg, or metoprolol 100 mg. The duration of active double-blind treatment was 4 weeks. There were 3 primary efficacy variables in the study; time until end of exercise, time until onset of chest discomfort, and time until 1-mm ST depression during a standardized exercise test.ResultsThe number of patients randomized was 397. There was a statistically significant improvement in time until end of exercise with felodipine-metoprolol 10/100 mg compared with metoprolol 100 mg (P =.04) and felodipine 10 mg compared with metoprolol 100 mg ( P =.03). However, for time until onset of pain or time until 1-mm ST-depression there were no significant differences among the treatment groups. At highest comparable workload, ST depression was less pronounced with felodipine-metoprolol than with metoprolol alone (P =.04), and the rate-pressure product was significantly lower in the groups receiving felodipine-metoprolol and metoprolol than in the group receiving felodipine alone. The combination and metoprolol were better tolerated than felodipine alone.ConclusionsIn stable angina pectoris, the combination felodipine-metoprolol 10/100 mg and felodipine 10 mg alone increased exercise time compared with metoprolol 100 mg. The combination tablet and metoprolol 100 mg alone showed a more favorable tolerability profile than felodipine 10 mg alone.

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