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  • 1
    ISSN: 1432-1041
    Keywords: omeprazole ; pepsinogen A ; pepsinogen C ; fasting serum gastrin ; pentagastrin ; gastric-acid ; healthy volunteers
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Medicine
    Notes: Summary A study has been done in 10 male healthy volunteers of the effect of oral omeprazole 20 mg daily for 3 days on the serum concentrations of Pepsinogens A and C in relation to changes in fasting serum gastrin and basal and pentagastrin stimulated gastric acid output. The concentrations of Pepsinogens A and C showed concomitant and variable but significant increases, and the Pepsinogen A, C ratio did not change during the 3-day course of omeprazole. The increments were also significantly correlated with the increase in fasting serum gastrin and with the reduction in pentagastrin stimulated acid output. The correlations were mainly due to the marked inhibition of gastric acid secretion and the corresponding increases in serum gastrin and Pepsinogens A and C in two subjects, as in the other 8 subjects the changes were only modest. There appears to be a relationship, therefore, between the degree of inhibition of acid by omeprazole and the parallel increases in both serum pepsinogens and fasting gastrin.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1365-2036
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: To compare the efficacy of ranitidine bismuth citrate plus clarithromycin (RBC–C) vs. omeprazole plus amoxycillin (OME–AMO) in the cure of Helicobacter pylori infection.〈section xml:id="abs1-2"〉〈title type="main"〉Methods:In this double-blind, multicentre, parallel-group study 122 H. pylori-positive patients with active duodenal ulcer or gastritis, with confirmed history of duodenal ulcer, were randomized to treatment with ranitidine bismuth citrate 400 mg b.d. plus clarithromycin 500 mg b.d. or omeprazole 20 mg b.d. plus amoxycillin 1000 mg b.d. for 14 days, followed by 14 days of ranitidine bismuth citrate 400 mg b.d. or omeprazole 20 mg once daily, respectively, to facilitate ulcer healing. Endoscopy was carried out at the start of the study and 28 days after the end of treatment. At each endoscopy four biopsies were obtained from the antrum and four biopsies from the corpus, for rapid urease test, histology and culture. H. pylori infection was defined as a positive urease test, confirmed by histology or culture. Cure of H. pylori infection was defined as negative urease test, histology or culture from both sites.〈section xml:id="abs1-3"〉〈title type="main"〉Results:Per-protocol, all-patients-treated and intention-to-treat cure rates (95% confidence interval) were, respectively, 90% (81–89%), 90% (82–89%) and 84% (74–93%) for ranitidine bismuth citrate plus clarithromycin, and 39% (27–54%), 44% (31–57%) and 41% (29–53%) for omeprazole plus amoxycillin, P 〈 0.00001. Both regimens were well tolerated. Eight patients were lost to follow-up, for lack of efficacy (one patient), adverse events (three patients) or refusal of second endoscopy (four patients).〈section xml:id="abs1-4"〉〈title type="main"〉Conclusion:Ranitidine bismuth citrate 400 mg b.d. with clarithromycin 500 mg b.d. is superior to omeprazole 20 mg b.d. with amoxycillin 1000 mg b.d. Ranitidine bismuth citrate with clarithromycin is the first dual therapy with high cure rates and good tolerance, and is easy to take. It may therefore prove a suitable first-line treatment in H. pylori infection.
    Type of Medium: Electronic Resource
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  • 3
    ISSN: 1573-2568
    Keywords: prostaglandin E2 analog ; enprostil ; omeprazole ; gastrin ; pepsinogen A ; pepsinogen C
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract This study was undertaken to determine whether the synthetic prostaglandin E2 analog enprostil is able to inhibit basal and postprandial hypergastrinemia induced by omeprazole. We also studied the effect of omeprazole, enprostil, and the combination of both drugs on serum pepsinogen A and C levels. Eight normal subjects received in random order five-day courses of 40 mg omeprazole once a day, 35 µg enprostil three times a day, the combination of both drugs, and placebo. Omeprazole induced significant increases in basal and postprandial serum gastrin and in pepsinogen A and C levels. These increments persisted on the day after stopping treatment. Coadministration of enprostil inhibited omeprazole-induced basal hypergastrinemia and postprandial integrated serum gastrin, but not basal serum pepsinogen A and C, while the inhibition on the day after the treatment courses only reached statistical significance for the postprandial integrated serum gastrin concentration. It is concluded that enprostil inhibits omeprazole-induced basal and postprandial hypergastrinemia, with a tendency to protracted inhibition after stopping the drugs, and that enprostil does not significantly influence omeprazole-induced increases in pepsinogen A and C level. Coadministration of enprostil may be helpful in preventing pronounced hypergastrinemia in the few patients who show large serum gastrin increases during treatment with omeprazole.
    Type of Medium: Electronic Resource
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