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  • Title: Bismuth-based combination therapy for Helicobacter pylori-associated peptic ulcer disease (metronidazole for eradication, ranitidine for pain).
    Author: Tefera S, Berstad A, Bang CJ, Nysaeter G, Hatlebakk JG, Olafsson S, Nesje LB, Hausken T, Berstad K, Hundal O.
    Journal: Am J Gastroenterol; 1996 May; 91(5):935-41. PubMed ID: 8633584.
    Abstract:
    OBJECTIVES: 180 Helicobacter pylori-positive patients with peptic ulcer disease were randomly allocated to double-blind placebo-controlled treatment with one of four anti-H. pylori regimens consisting of bismuth subnitrate suspension (B), oxytetracycline (OT), metronidazole (M)/metronidazole placebo, or ranitidine (R)/ranitidine placebo. METHODS: Regimen 1: B 150 mg q.i.d., OT 500 mg q.i.d., M 400 mg t.i.d. for 10 days and R 300 mg b.i.d. for 4 wk. Regimen 2: same as regimen 1 except ranitidine. Regimen 3: same as regimen 1 except metronidazole. Regimen 4: same as regimen 1 except metronidazole and ranitidine. Gastroscopy and 14C-urea breath test were performed 4 wk after cessation of therapy, and breath test six months after cessation. RESULTS: According to intention-to-treat analysis, H. pylori eradication rates were 96%, 91%, 20%, and 9% with regimens 1, 2, 3, and 4, respectively. Comparing regimens 1+2 and 3+4, the eradication rates with and without metronidazole were 93% and 14%, respectively (p < 0.0001). Metronidazole increased the occurrence of diarrhea and abdominal pain. Comparing regimens 1+3 with 2+4 ranitidine did not influence H. pylori eradication (58% with and 50% without ranitidine; p = 0.37) or ulcer healing (93% with and 90% without ranitidine; p = 0.72) significantly, but reduced the occurrence of pain (p < 0.01). Six months after treatment, three patients who were H. pylori negative at 4 wk had become positive. These three had all received metronidazole placebo. H. pylori status remained negative in the other 85 patients. CONCLUSIONS: H. pylori eradication with this triple therapy is critically dependent on metronidazole. Adding ranitidine reduces the occurrence of abdominal pain during such therapy.
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