The effect of orally administered metiamide, a Histamine H2-receptor antagonist, on the rate of gastric emptying was assessed in 24 uncomplicated duodenal ulcer patients given a standard meal containing indium 113m D.T.P.A. chelate. Metiamide produced significant slowing of gastric emptying when compared with control studies performed on the same patients following oral administration of a placebo.
In a further study the effect of metiamide on the serum gastrin response to a protein meal was assessed in seven healthy male volunteers. Paired experiments demonstrated that a significantly greater elevation of serum gastrin occurred after metiamide than after placebo.
The delay in gastric emptying produced by metiamide may be mediated by an elevation of the serum gastrin concentration.
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