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Osteoporosis Health Center

Fastest Osteoporosis Drug: Actonel

Actonel Beats Fosamax in Fewest First-Year Fractures After Menopause
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WebMD Health News
Reviewed by Louise Chang, MD

Nov. 27, 2006 -- Actonel and Fosamax both prevent bone loss after menopause. But Actonel works faster, a study by top osteoporosis experts suggests.

Actonel (made by Procter & Gamble) and Fosamax (made by Merck) are both effective treatments for age-related osteoporosis. This kind of bone loss is a particular problem for women after menopause.

The two drugs are members of a class of drugs known as bisphosphonates, as is a newer drug, Roche's Boniva.

There has been some evidence that Actonel may work more quickly to prevent fractures -- particularly the all-too-common hip and non-spine fractures that can greatly reduce a person's quality of life.

But is this really the case?

Nelson B. Watts, MD, director of the University of Cincinnati Bone Health and Osteoporosis Center, joined a team of internationally renowned experts in an effort to find out.

The researchers analyzed insurance records for 12,215 postmenopausal women who took Actonel and 21,615 women who took Fosamax for the first time. The women were 65 and older.

The result: After a year of treatment, women taking Actonel had 43% fewer hip fractures and 18% fewer non-spine fractures than women taking Fosamax.

"This adds to the suggestion from clinical trials that Actonel works faster than Fosamax," Watts tells WebMD. "We found a significantly lower rate of fracture at hip and non-vertebral sites for patients given Actonel vs. Fosamax at both six and 12 months.

"I am not saying one drug is better than the other -- only that Actonel works faster," Watts says.

The study -- sponsored by Procter & Gamble and Sanofi -- appears in the current online issue of the journal Osteoporosis International.

Procter & Gamble, Merck, Roche, and Sanofi are WebMD sponsors.

Slice of Life -- but Not Proof Positive

Watts is quick to point out that the study is not a clinical trial and therefore cannot be taken as conclusive proof.

But the study impresses Holly Thacker, MD, director of the Women's Health Center at The Cleveland Clinic.

Thacker, who was not involved in the study, notes that Watts and colleagues looked at the kind of women doctors see in real life. Moreover, they evaluated the endpoint that really matters to women suffering bone loss -- actual bone fractures.

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