Randomized, double-blind, placebo-controlled trial: effect of lactobacillus GG supplementation on Helicobacter pylori eradication rates and side effects during treatment in children

J Pediatr Gastroenterol Nutr. 2009 Apr;48(4):431-6. doi: 10.1097/mpg.0b013e318182e716.


Objective: To determine the effectiveness of Lactobacillus GG (LGG) in children with Helicobacter pylori infection undergoing eradication therapy.

Materials and methods: We conducted a double-blind, placebo-controlled, randomized trial comparing a 7-day, triple eradication regimen consisting of 2 antibiotics (amoxicillin tablets, 25 mg/kg twice per day, and clarithromycin tablets, 10 mg/kg twice per day) plus a proton pump inhibitor (omeprazole capsules, 0.5 mg/kg twice per day) supplemented with LGG (109 colony-forming units) or placebo in 83 children with H pylori infection confirmed by 2 of 3 tests (13C-urea breath test, histopathology, rapid urease test). The primary outcome measure was the H pylori eradication rate. The secondary outcome measure was the proportion of patients who experienced therapy-related adverse effects during anti-H pylori treatment.

Results: The groups did not differ with respect to H pylori eradication rates. Of the 34 children in the LGG group, 23 (69%) experienced eradication, compared with 22 of 32 children (68%) in the placebo group (RR 0.98, 95% CI 0.7-1.4). The groups did not differ with respect to adverse effects.

Conclusions: In children with H pylori infection, supplementation of standard triple therapy with LGG did not significantly alter the eradication rate or side effects.

Publication types

  • Randomized Controlled Trial

MeSH terms

  • Adolescent
  • Amoxicillin / adverse effects
  • Amoxicillin / therapeutic use
  • Anti-Bacterial Agents / adverse effects
  • Anti-Bacterial Agents / therapeutic use*
  • Anti-Ulcer Agents / adverse effects
  • Anti-Ulcer Agents / therapeutic use*
  • Child
  • Clarithromycin / adverse effects
  • Clarithromycin / therapeutic use
  • Combined Modality Therapy
  • Dietary Supplements
  • Double-Blind Method
  • Drug Therapy, Combination
  • Female
  • Helicobacter Infections / drug therapy
  • Helicobacter Infections / microbiology
  • Helicobacter Infections / therapy*
  • Helicobacter pylori* / drug effects
  • Humans
  • Lactobacillus*
  • Male
  • Omeprazole / adverse effects
  • Omeprazole / therapeutic use*
  • Placebos / therapeutic use
  • Probiotics / therapeutic use*


  • Anti-Bacterial Agents
  • Anti-Ulcer Agents
  • Placebos
  • Amoxicillin
  • Clarithromycin
  • Omeprazole