PT  - JOURNAL ARTICLE
AU  - J Labenz
AU  - B Tillenburg
AU  - U Peitz
AU  - E Verdú
AU  - M Stolte
AU  - G Börsch
AU  - A L Blum
TI  - Effect of curing Helicobacter pylori infection on intragastric acidity during treatment with ranitidine in patients with duodenal ulcer.
AID  - 10.1136/gut.41.1.33
DP  - 1997 Jul 01
TA  - Gut
PG  - 33--36
VI  - 41
IP  - 1
4099  - http://gut.bmj.com/content/41/1/33.short
4100  - http://gut.bmj.com/content/41/1/33.full
SO  - Gut1997 Jul 01; 41
AB  - BACKGROUND: In patients with duodenal ulcer cure of Helicobacter pylori infection resulted in a pronounced decrease in intragastric pH during treatment with omeprazole. AIM: To test the hypothesis that treatment of H pylori adversely affects the pH response to ranitidine. PATIENTS: Eighteen patients with duodenal ulcer who were infected with H pylori were studied. METHODS: Twenty four hour pH recordings were performed during treatment with ranitidine (300 mg) at night before and four to six weeks after cure of H pylori infection. Presence of H pylori was assessed by a rapid urease test, culture, histology, and a 13C urea breath test. Also, the fasting gastrin concentrations were measured before and after treatment for H pylori infection. RESULTS: Cure of H pylori infection resulted in a considerable improvement in both antral and corpus gastritis and a decrease in fasting gastrin concentrations. As a result of the cure the night time intragastric pH during treatment with ranitidine decreased (median pH 6.8 v 5.4; p = 0.007), whereas the acidity during the daytime was not affected. CONCLUSIONS: In patients with duodenal ulcer the intragastric pH during treatment with ranitidine depends on H pylori. However, the loss of effectiveness in altering pH seems to be less pronounced than previously found with omeprazole.