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Adverse reactions to antibiotics send thousands of patients to the ER
August 13, 2008Adverse events from antibiotics cause an estimated 142,000 emergency department visits per year in the United States, according to a study published in the September 15, 2008 issue of Clinical Infectious Diseases.
"This number is an important reminder for physicians and patients that antibiotics can have serious side effects and should only be taken when necessary," said study author Daniel Budnitz, M.D., at the Centers for Disease Control and Prevention (CDC).
Prior to this study, detailed data on the scope and burden of antibiotic adverse events in the U.S. were not available. This investigation is the first to use timely, nationally representative surveillance data to estimate and compare the numbers and rates of adverse events from systemic antibiotics by class, drug, and event type.
Half of the visits were for reactions to penicillins and the other half were from reactions to other antibiotics used to treat a wide variety of bacterial infections. After accounting for how often antibiotics were prescribed, children less than one year old were found to have the highest rate of adverse drug events.
Almost 80 percent of all antibiotic adverse events in the study were allergic reactions, ranging from rash to anaphylaxis, and the remaining 20 percent were caused by errors and overdoses. Unlike errors and overdoses from other drugs, allergic reactions to antibiotics typically can only be prevented by avoiding exposure to the drug in the first place.
The study draws from the National Electronic Injury Surveillance System-Cooperative Adverse Drug Event Surveillance (NEISS-CADES) project, a sample of 63 hospitals in the United States and its territories. NEISS-CADES is a joint effort of the CDC, the United States Consumer Product Safety Commission, and the Food and Drug Administration.
Previous studies have suggested that half of the estimated 100 million antibiotic prescriptions written in the community setting each year for respiratory tract infections may be unnecessary. "For conditions in which antibiotics have questionable benefit, such as many mild upper respiratory tract infections, weighing the benefits of antibiotics with the risks of a serious adverse event will be especially important," said Budnitz. "Because antibiotics are frequently used, both appropriately and inappropriately, if doctors would reduce the number of antibiotics they prescribe to their patients by even a small percentage, we could significantly reduce the number of emergency visits for antibiotic adverse events. Physicians need to communicate to their patients that antibiotics are not harmless," he added.
The researchers found that only 6 percent of the patients who experienced adverse events required hospitalization. The others were all treated and released. However, the study only reflected emergency department admissions. Unreported cases and visits to a physician's office could not be taken into account.
Infectious Diseases Society of America
Half of the visits were for reactions to penicillins and the other half were from reactions to other antibiotics used to treat a wide variety of bacterial infections. After accounting for how often antibiotics were prescribed, children less than one year old were found to have the highest rate of adverse drug events.
Almost 80 percent of all antibiotic adverse events in the study were allergic reactions, ranging from rash to anaphylaxis, and the remaining 20 percent were caused by errors and overdoses. Unlike errors and overdoses from other drugs, allergic reactions to antibiotics typically can only be prevented by avoiding exposure to the drug in the first place.
The study draws from the National Electronic Injury Surveillance System-Cooperative Adverse Drug Event Surveillance (NEISS-CADES) project, a sample of 63 hospitals in the United States and its territories. NEISS-CADES is a joint effort of the CDC, the United States Consumer Product Safety Commission, and the Food and Drug Administration.
Previous studies have suggested that half of the estimated 100 million antibiotic prescriptions written in the community setting each year for respiratory tract infections may be unnecessary. "For conditions in which antibiotics have questionable benefit, such as many mild upper respiratory tract infections, weighing the benefits of antibiotics with the risks of a serious adverse event will be especially important," said Budnitz. "Because antibiotics are frequently used, both appropriately and inappropriately, if doctors would reduce the number of antibiotics they prescribe to their patients by even a small percentage, we could significantly reduce the number of emergency visits for antibiotic adverse events. Physicians need to communicate to their patients that antibiotics are not harmless," he added.
The researchers found that only 6 percent of the patients who experienced adverse events required hospitalization. The others were all treated and released. However, the study only reflected emergency department admissions. Unreported cases and visits to a physician's office could not be taken into account.
Infectious Diseases Society of America
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