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Summary
A double-blind trial of azapropazone (300 trig. 4-times daily) and ketoprofen (50 mg. 4-times daily) was carried out in 50 patients with acute backache sufficiently severe to necessitate hospital admission. Of 39 patients who completed the full 3-weeks' study period, 18 preferred azapropazone therapy, 10 preferred ketoprofen, and 11 showed either preference for the intermediate placebo period or no preference at all. Ten patients suffered from sufficiently severe side-effects with ketoprofen to necessitate their withdrawal from the trial. There were no similar episodes of withdrawal occurring during the azapropazone period.