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Byline: Marilynn Marchione
For the first time, a drug has been shown to prevent prostate cancer, though some men may pay a price for it in their sex lives.
Men who took finasteride _ sold as Proscar for enlarged prostates and at a lower dose as Propecia for baldness _ had a 25 percent lower risk of developing prostate cancer, the nation's largest prostate cancer prevention study found.
The news was so significant that the study was stopped early and its results published online Tuesday by the New England Journal of Medicine.
"This trial proves that prostate cancer, at least in part, is preventable. It is a huge step forward for cancer research," said Peter Greenwald, director of cancer prevention for the National Cancer Institute, which funded the study. He also was among the nearly 19,000 men who took part in the study for the last seven years.
"I wanted to set an example," he said. Having an official participate "could provide reassurance that we really believe it's the right…