AIM To evaluate whether eradication of Helicobacter pylori prevents peptic ulcer in non-steroidal anti-inflammatory drug users by means of a meta-analysis. MATERIAL AND METHODS A systematic search was performed in MEDLINE, EMBASE, the Cochrane Controlled Trials Register and the AGA congress. Randomized trials comparing H. pylori eradication vs. non-eradication or eradication vs. a proton pump...