Does delayed gastric emptying shorten the H pylori eradication period？ A double blind clinical trial

AIM： To evaluate the gastric emptying inhibitory effects of sugar and levodopa on Hpylori eradication period.METHODS： A total of 139 consecutive patients were randomized into 6 groups. The participants with peptic ulcer disease or non-ulcer dyspepsia non-responding to other medications who were also H pylori-positive patients either with positive rapid urease test （RUT） or positive histology were included. All groups were pretreated with omeprazole for 2 d and then treated with quadruple therapy regimen （omeprazole, bismuth, tetracycline and metronidazole）, all drugs were given twice daily. Groups 1 and 2 were treated for 3 d, groups 3, 4 and 5 for 7 d, and group 6 for 14 d. Groups 1 to 4 received sugar in the form of 10% sucrose syrup. Levodopa was prescribed for groups 1 and 3. Patients in groups 2 and 4 were given placebo for levodopa and groups 5 and 6 received placebos for both sugar and levodopa. Upper endoscopy and biopsies were carried out before treatment and two months after treatment. Eradication of H pylori was assessed by RUT and histology 8 wk later. RESULTS： Thirty patients we re excluded. Per-protocol analysis showed successful eradication in 53% in group 1, 56% in group 2, 58% in group 3, 33.3% in group 4, 28% in group 5, and 53% in group 6. Eradication rate, patient compliance and satisfaction were not significantly different between the groups.CONCLUSION： It seems that adding sugar or levodopa or both to anti H pylori eradication regimens may lead to shorter duration of treatment.