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Study: Stomach Acid Drugs Linked to Fracture Risk

Analysis Suggests Increased Risk of Fractures for Users of Proton Pump Inhibitors
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WebMD Health News
Reviewed by Laura J. Martin, MD

May 9, 2011 -- Long-term, regular users of drugs known as proton pump inhibitors (PPIs) such as Nexium, PrevacidPrilosec, and Protonix appear to have a heightened risk of fractures, a study shows.

The researchers found that this class of acid-suppressive drugs raises the chances of breaking a bone by nearly 30%.

The study is published in the Annals of Family Medicine.

Available by prescription as well as over the counter, PPIs work by reducing the secretion of gastric acid. They are commonly recommended for patients with gastroesophageal reflux disease (GERD), peptic ulcer disease, erosive esophagitis, and Barrett’s esophagus.

PPIs are the third largest-selling class of therapeutic drugs on the market, with sales totaling $13.6 billion in 2010, according to IMS Health.

For patients with potentially serious conditions, the benefits offered by PPIs often outweigh the risks associated with them, says James M. Gill, MD, MPH, president of Delaware Valley Research Outcomes in Newark, Del., and lead author of an editorial accompanying the study.

“For certain things, PPIs are clearly indicated,” he says. The problem is that “many doctors don’t follow guidelines” and prescribe PPIs “willy-nilly.”

“This study is not a game changer in terms of guidelines,” Gill continues, “but it should encourage physicians to pay closer attention and be more cautious with these medications when they prescribe them.”

Analyzing Fracture Risk

The present study, by researchers at Seoul National University Hospital in South Korea, is an analysis of 11 previously published studies in which researchers examined the possible link between fracture risk and PPIs. Overall, the risk of fracture increases by 29% with the use of PPIs. Hip fracture risk rises by 31%, vertebral fractures by 54%.

The researchers also report that they were unable to find a significant association between fracture risk and histamine H2-receptor antagonists, another class of acid-suppressing drugs, marketed under brand names such as Axid, Pepcid, Tagamet, and Zantac.

The researchers explain that the increased risk of fracture likely occurs in part because PPIs interfere with the body’s ability to absorb calcium, leading to weaker bones that are more prone to break.

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