Randomised controlled trial of Helicobacter pylori eradication in patients on non-steroidal anti-inflammatory drugs: HELP NSAIDs study

The effect of Helicobacter pylori in patients receiving non-steroidal anti-inflammatory drugs (NSAIDs) is unclear. We investigated the effects of H pylori eradication in patients with current or previous peptic ulceration, dyspepsia, or both who continued to use NSAIDs. 285 patients were randomly assigned omeprazole 20 mg, amoxycillin 1000 mg, and clarithromycin 500 mg, twice daily (n=142, H pylori eradication treatment), or omeprazole with placebo antibiotics (n=143, controls) for 1 week. All patients received omeprazole 20 mg once daily for 3 weeks until endoscopy, and, if the ulcer was not healed, 40 mg once daily until repeat endoscopy at 8 weeks. Ulcer-free patients with mild dyspepsia continued NSAIDs but not antiulcer treatment. We investigated ulcers with endoscopy at 1, 3, and 6 months and with carbon-13-labelled urea breath test at 3 months. The estimated probability of being ulcer-free at 6 months was 0.56 (95% CI 0.47–0.65) on eradication treatment and 0·53 (0·44–0·62) on on control treatment (p=0·80). Time to treatment failure did not differ between groups for ulcers or dyspepsia alone, per-protocol analysis, or final H pylori status. 66% (58–74) of the eradication group compared with 14% (8–20) of the control group had a final negative H pylori result (p