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Background: Different modified sequential therapies have been proposed for Helicobacter pylori eradication. However, the efficacy of these regimens is controversial. Methods: We performed a systematic review of the literature and pooled-data analysis to assess: (a) the efficacy of different modified sequential therapies for H. pylori eradication, (b) the eradication rates achieved by these regimens as compared to either standard triple therapies or standard sequential regimen when available. Results: Overall 21 trials met inclusion criteria. The most used modified sequential therapy was the seven plus seven tetracycline-based regimen which achieved an overall 73.3% eradication rate (6 trials). Such therapy was more effective than the 14-day triple therapy (77.2% vs. 63.6%; 3 trials). The most used five plus five levofloxacin-based sequential therapy achieved a 95.8% and 90% cure rates when 250. mg and 500. mg levofloxacin twice daily were used, respectively. These success rates were higher as compared to that of either standard sequential or triple therapies. Other modified sequential therapies did not achieved acceptably high cure rates. Contradictory results emerged from 2 studies assessing the efficacy of a levofloxacin-based sequential regimen as a second-line therapy. Conclusions: Both levofloxacin- and tetracycline-based sequential therapies have been proved to be more effective than standard triple therapies, confirming that the 'sequential' administration of drugs is a successful therapeutic procedure for H. pylori infection. © 2012 Editrice Gastroenterologica Italiana S.r.l.

Modified sequential therapy regimens for Helicobacter pylori eradication: A systematic review / Zullo, A.; De Francesco, V.; Hassan, C.; Ridola, L.; Repici, A.; Bruzzese, V.; Vaira, D.. - In: DIGESTIVE AND LIVER DISEASE. - ISSN 1590-8658. - 45:1(2013), pp. 18-22.

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