Effect of smoking on duodenal ulcer healing with cimetidine and oxmetidine.

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Abstract
The effect of oxmetidine 800 mg/day, a new histamine H2-receptor antagonist, on duodenal ulcer healing was compared with cimetidine 1000 mg/day in a two-centre double-blind trial. Ninety-nine patients completed the study. After four weeks, ulcers were healed in 74% of the cimetidine-treated patients and in 78% of the oxmetidine-treated patients (p greater than 0.05). Healing rates after eight weeks increased to 90% in the cimetidine group and to 94% in the oxmetidine group. Healing rates after four weeks were, however, different in the two centres (p less than 0.01): in centre 1 88% of the cimetidine-treated, but 63% of the oxmetidine-treated patients healed, in centre 2 rates were 60% (cimetidine) and 92% (oxmetidine). Analysis of patient data revealed that in the two centres treatment success was inversely correlated (p less than 0.01) with the percentage of smokers in each treatment group. Smoking significantly influences duodenal ulcer healing with histamine H2-receptor antagonists.

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