Probiotics Help Treat Antibiotic-associated Diarrhea

by Sheela Philomena on  May 9, 2012 at 8:52 AM Research News
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The risk of developing diarrhea can be reduced by taking probiotics, shows study. Diarrhea is the common side effect of taking antibiotics.
 Probiotics Help Treat Antibiotic-associated Diarrhea
Probiotics Help Treat Antibiotic-associated Diarrhea

Probiotics are microorganisms that are believed to improve health by maintaining a normal balance of microorganisms in the human intestines. They are contained in some food products and also are sold as nutritional supplements.

Pooling evidence from a large number of published research studies examining the effects of probiotics, RAND researchers found consistent evidence that probiotics can benefit people who are taking antibiotics. The findings are published in the May 9 edition of the Journal of the American Medical Association.

"We found a clear beneficial effect of probiotics in preventing or treating antibiotic-associated diarrhea," said study co-author Sydne J. Newberry, a nutritional scientist and a researcher at RAND, a nonprofit research organization. "However, more work is needed to determine which types of probiotics work best, which patients are most likely to benefit from probiotics and whether there are any risks in using them."

As many as 30 percent of patients who take antibiotics suffer from diarrhea, a side effect that is a key reason why some patients do not follow through with a full course of antibiotic treatment. Interest in the possibility that probiotics might help or prevent this type of diarrhea has grown in recent years, resulting in a proliferation of individual studies.

Researchers from the RAND-based Southern California Evidence-Based Practice Center conducted an extensive review of the medical literature to find studies that examined whether probiotic use can prevent and treat antibiotic-associated diarrhea. Researchers pooled results from the studies together to gain a clearer understanding of whether probiotics can prevent or treat antibiotic-associated diarrhea.

Use of probiotics was associated with a 42 percent lower risk of developing diarrhea when taking antibiotics as compared to not using probiotics. The RAND analysis estimates that 13 people would need to use probiotics in order to prevent one case of antibiotic-associated diarrhea.

However, researchers say the evidence was insufficient to show which type of microorganism was better than another because the included strains were poorly documented and often given as blends of several types. Further, there was no indication that the response varied systematically by a person's age, the duration of antibiotic use or other clinical indications.

The RAND team says that future efforts to study the effects of probiotics should try to determine whether some strains or combinations of probiotics work better than others, work best with specific antibiotics and whether use of probiotics for antibiotic-associated diarrhea is associated with any health risks.

Source: Eurekalert

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