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Common Diabetes Drug Linked To Bone Thinning

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The Associated Press

Published: December 3, 2007

WASHINGTON - The popular diabetes drug marketed as Avandia may increase bone thinning, a discovery that could help explain why diabetics can have an increased risk of fractures.

New research raises the possibility that long-term treatment with rosiglitazone, as Avandia is also called, could lead to osteoporosis. The diabetes drug is used to improved response to insulin.

While bones seem solid, they constantly are being broken down and rebuilt by the body. Researchers found that in mice, the drug increased the activity of the cells that degrade bones, according to a report in this week's online issue of Nature Medicine.
Avandia recently was labeled with warnings about the risk of heart failure in some patients. GlaxoSmithKline, which markets the drug, already has acknowledged that a study found a higher risk of fractures among women who take the drug. This report is the first, however, to attempt to explain the link between the drug and fractures.

The finding "has led to a better understanding of the challenges associated with long-term treatment of patients with Type II diabetes," said Ronald M. Evans of the Salk Institute for Biological Studies in La Jolla, Calif., lead author of the report.

The research was funded by the Howard Hughes Medical Institute and the National Institutes of Health.

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