Amlodipine versus diltiazem as additional antianginal treatment to atenolol. Centralised European Studies in Angina Research (CESAR) Investigators.

The antianginal efficacy and tolerability of amlodipine and diltiazem were compared in a double-blind randomized trial of 97 patients with angina resistant to atenolol alone. Both amlodipine and diltiazem significantly reduced the frequency of angina attacks (p <0.001) and glyceryl trinitrate consumption (p <0.05 to p <0.01). During Holter monitoring, both treatments reduced the overall frequency of ambulatory myocardial ischemia, although changes did not reach statistical significance. Exercise test parameters (total exercise time, time to angina, time to ST depression, and maximum ST depression) tended to improve with both treatments, but changes did not achieve statistical significance relative to baseline or to each other. Both drugs were generally well tolerated. Adverse events occurred in 15 patients in the amlodipine group (30%) and in 17 patients in the diltiazem group (36%), but patients taking diltiazem reported almost twice as many adverse events (30) patients taking amlodipine (18). Quality of life, as assessed by total Nottingham Health Profile Scores, was not significantly different between treatments. The addition of either once-daily amlodipine or twice-daily sustained release diltiazem improved symptoms in patients with angina resistant to atenolol alone, but diltiazem was associated with more frequent and more serious adverse events.

RCT Entities:   Population Interventions Outcomes