Abstract
Nizatidine, a new H2-receptor antagonist, was compared with ranitidine in a double-blind, randomized, multicentre trial for the prevention of duodenal ulcer relapse. This is the interim analysis of 197 patients admitted to the study by 1 September 1985, having finished a 6-month treatment period by 1 March 1986. At night, 96 and 101 patients received 150 mg nizatidine and 150 mg ranitidine, respectively. Both groups were well matched for demographic data, duration and severity of ulcer disease. Calculating cumulative relapse rates by the life-table method of Cutler and Ederer, 18% on nizatidine and 13% on ranitidine had experienced a symptomatic or asymptomatic recurrence. The difference is not statistically significant. The symptomatic response was identical in both groups, 3/4 of the patients in both groups being free of any symptom over all 6 months. During maintenance treatment, 24% of the patients on nizatidine and 32% of those on ranitidine reported new symptoms, listed as 'adverse events'. However, none of these events was likely to be drug related. There was no difference between the two groups concerning the percentage change of laboratory variables from baseline to endpoint.
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