Effect of Probiotic Use on Antibiotic Administration Among Care Home Residents: A Randomized Clinical Trial

RCT (n=310) found that daily oral probiotic (combination of Lactobacillus rhamnosus GG and Bifidobacterium animalis subsp lactis BB-12) use did not reduce cumulative systemic antibiotic administration days vs placebo (12.9 vs 12.0, 95%CI 0.79 to 1.63).

Journal of the American Medical Association