to study the effect of omeprazole and h2-receptor antagonists on the mitochondrial activity of the parietal cells , endoscopic biopsies were taken from nine patients with duodenal ulcer before and after treatment with either 10 mg or 20 mg omeprazole each morning , or 150 mg ranitidine twice daily for 2 weeks , given in a double-blind randomized manner .
C0013295
duodenal ulcer
C0028978
omeprazole