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Penicillin allergy is often unconfirmed in hospital patients, meaning many unnecessarily receive other antibiotics that may be less effective and even harmful, a new study finds.
The researchers analyzed records of nearly 11,000 patients at 106 U.S. hospitals and found that 16 percent of those with a self-reported penicillin allergy were twice as likely to be prescribed alternative antibiotics.
But the substitutions were probably unnecessary, according to a study published recently in JAMA Internal Medicine, because more than nine out of 10 reported penicillin allergies have not been confirmed.
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