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Posted: Thu 23:57, 22 Aug 2013 Post subject: Hormone pill slows prostate cancer's growth-spun4 |
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Hormone pill slows prostate cancer's growth
CHICAGO - A hormone-blocking pill approved last year for many men with advanced prostate cancer now also seems to help a wider number of men that were given it sooner in the course of treating their disease,[link widoczny dla zalogowanych].
Inside a study of nearly 1,100 such men, Johnson Johnson's Zytiga doubled time patients lived without their cancer getting worse.
The drug also seems to be improving survival, but it will require longer follow-up to understand without a doubt. Independent monitors stopped the research once it was pay off the drug was helping and let men who have been getting dummy pills to switch to Zytiga. At that point - after a median treatment time of 2 yrs - 34 percent of men on dummy pills passed away versus 27 per cent of these taking Zytiga.
"Our hope is that this may become a new option" for approximately 30,[link widoczny dla zalogowanych],000 men each year in the usa, said study leader Dr. Charles Ryan from the University of California, Bay area.
He gave results Saturday at a meeting in Chicago of the American Society of Clinical Oncology,[link widoczny dla zalogowanych].
Cancer of the prostate is easily the most common cancer in American men. In the usa alone, more than 240,000 new cases and 28,[link widoczny dla zalogowanych],000 deaths in the disease are expected this year. Many cases don't need treatment because the cancer grows so slowly it isn't a threat. For males that like treatment when the disease is still limited to the prostate, surgery and radiation are common options.
Once it spreads,[link widoczny dla zalogowanych], though, many times,[link widoczny dla zalogowanych], it is treated with drugs that curb testosterone. They block about 90 per cent of the hormone, "but that remaining 10 % can continue to stimulate the cancer and cause death from the disease," Ryan said.
Zytiga blocks almost all from it - "it's really complete chemical castration,[link widoczny dla zalogowanych]," said another study leader, Duke University's Dr. Daniel George.
The drug won federal approval last year for males with advanced prostate cancer whose disease had worsened despite treatment with standard hormones and chemotherapy. Those on Zytiga were faring far better,[link widoczny dla zalogowanych], so doctors can only estimate time it is taking for their cancers to worsen - a minimum of 16 months, Ryan said.
There have been more cases of hypertension, fluid retention and heart problems among men on Zytiga. Like other hormone-blockers, it can cause hot flashes and sexual problems. And Zytiga is expensive - $5,500 per month in the United States.
The research was sponsored by the drug's maker, Johnson Johnson's Janssen division, plus some study leaders have financial ties to the company. The company intends to seek approval later this season to sell the drug for males like those in the brand new study.
Michael Wells,[link widoczny dla zalogowanych], 65, a retired construction worker from Oakville in California's Napa Valley, was diagnosed nearly 12 years ago with cancer of the prostate which had spread to his bones. Standard hormone and radiation treatments kept it under control for many years, however when it started growing,[link widoczny dla zalogowanych], he signed up for the study.
Zytiga gave him hypertension but other than that, "I have not noticed any difference taking the pills - I've always had hot flashes" on prostate medicines, he said.
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