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Opioids linked to higher risk of pneumonia in older adults
Date:9/22/2011

SEATTLE, WA -- Opioids -- a class of medicines commonly given for pain -- were associated with a higher risk of pneumonia in a study of 3,061 adults, aged 65 to 94, e-published in advance of publication in the Journal of the American Geriatrics Society. The study from researchers at Group Health Research Institute and the University of Washington (UW) also found that benzodiazepines, which are drugs generally given for insomnia and anxiety, did not affect pneumonia risk.

"Pneumonia is a common infection that can have serious consequences in older adults," said study leader Sascha Dublin, MD, Ph.D, a Group Health Research Institute assistant investigator and Group Health primary care physician.

"Opioids and benzodiazepines work in different ways, but both can decrease the breathing rate. Both are also sedatives, which can increase the risk of aspiration." Aspiration is inhaling material (including saliva or food particles) from the mouth into the lungs, which can lead to pneumonia.

A 2009 study estimated that two million Americans age 65 and older received long-term opioid treatment for non-cancer pain. Prescription opioid use has been on the rise in the United States. In earlier Group Health research, the use of chronic opioid therapy for chronic non-cancer pain doubled in the prior decade. And a 1998 report found that one in 10 older Americans used benzodiazepines.

"In animal studies, some opioids -- including morphine, codeine, and fentanyl -- harm the immune system, which also might contribute to pneumonia," said Dr. Dublin. She and her research team hypothesized that risk of pneumonia would be higher in people using opioids or benzodiazepines than in people not using these medications, and would be highest for opioids that suppress the immune system. Study subjects were members of Group Health Cooperative, a nonprofit health care system with extensive computerized pharmacy, laboratory, and medical records that were used in the ana
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Contact: Joan DeClaire
declaire.j@ghc.org
206-287-2653
Group Health Research Institute
Source:Eurekalert

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