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When prescribing antibiotics, doctors most often choose strongest types of drugs
Date:8/1/2013

(SALT LAKE CITY)When U.S. physicians prescribe antibiotics, more than 60 percent of the time they choose some of the strongest types of antibiotics, referred to as "broad spectrum," which are capable of killing multiple kinds of bacteria, University of Utah researchers show in a new study.

Unfortunately, in more than 25 percent of such prescriptions are useless because the infection stems from a virus, which cannot be treated with antibiotics. This overuse of antibiotics has a number of downsides, including that these types of drugs kill more of the "good" bacteria found in our bodies which may lead to more side effects and also contribute to the growth of antibiotic-resistant bacteria, according to Adam L. Hersh, M.D., Ph.D., an infectious disease expert, assistant professor of pediatrics at the University of Utah School of Medicine and senior author on a study published July 29, 2013, in the Journal of Antimicrobial Chemotherapy.

Discerning whether an infection is viral or bacterial can be tricky, according to Hersh, which probably accounts for much of the overuse of antibiotics. "It seems that the natural bias, when there is uncertainty about an infection's cause, is to err on the side of prescribing antibiotics," he says. "Our study found that the majority of prescriptions are for antibiotics that kill a wider range of bacteria, and that they are most likely to be given when they're not needed, such as in cases of viral infections."

The types of illnesses where doctors seem to choose stronger antibiotics include respiratory problems, skin infections and urinary tract infections, which in many cases would be better treated by other antibiotics that are less likely to cause resistance.

Hersh, Andrew T. Pavia, M.D., also an infectious disease expert and professor of pediatrics at the University of Utah, Lauri A. Hicks, D.O., a medical epidemiologist at the U.S. Centers for Disease Control and Prevention, and U
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Contact: Phil Sahm
phil.sahm@hsc.utah.edu
801-581-2517
University of Utah Health Sciences
Source:Eurekalert

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