An Investigation into the Effects of Omeprazole on Renal Tubular Function and Endocrine Function in Man

Abstract
Omeprazole is a substituted benzimidazole which inhibits gastric acid secretion by inhibition of parietal cell H+K+ATPase. It has previously been shown (1) that it is a powerful inhibitor of gastric acid secretion in man. In animal studies, antibodies raised against H+K+ATPase cross-reacted with thyroid and thymus tissue (2). AB Hässle have reported lowered tri-iodothyronine (T3) and raised thyroid stimulating hormone (TSH) levels in laboratory animals given omeprazole in very high doses (unpublished data). In this study, the effects of omeprazole on endocrine function in male subjects were investigated, and effects on renal tubular handling of acid and electrolytes examined.

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