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Prostate cancer drug reduces testosterone levels in as little as 3 days
Date:12/3/2008

ian testosterone level of 3.93 ng/mL. The aim was to reduce this to 0.5ng/mL or less at all monthly measurements from day 28 to day 364.

Eight out of ten study participants completed the trial (504 patients) between February 2006 and October 2007, with similar drop-out and exclusion rates in all three groups.

The key findings were impressive:

  • Three days after starting their treatment regimes, 96.1 per cent of the patients on 240/80mg degarelix and 95.5 per cent of the patients on 240/160mg degarelix had achieved a testosterone level of 0.5ng/mL or less. In contrast, median testosterone levels in the leuprolide group had increased by 65 per cent by day three, but had reduced by day 28.

  • At the end of the study period, 98.3 per cent of the 240/160mg degarelix group and 97.2 per cent of the 240/80mg degarelix group had achieved a testosterone level of 0.5ng/mL or less. The figure for the leuprolide group was 96.4 per cent.

  • PSA levels fell much faster in the degarelix groups when measured at 14 and 28 days by 64 per cent and 85 per cent in the degarelix 240/80mg group, 65 per cent and 83 per cent in the 240/160mg degarelix group and 18 per cent and 68 per cent in the leuprolide group.

The hormonal side-effects experienced by the three treatment groups were similar to previously reported effects for androgen deprivation hormone therapy.

Patients receiving degarelix were much more likely to experience injection-site reactions than those receiving leuprolide (40 per cent compared to one per cent).

However degarelix patients suffered fewer urinary tract infections than those in the leuprolide group (three per cent versus nine per cent) together with fewer joint pains and chills (four per cent versus nine per cent).

"More than 2,000 patients have now taken part in clinical trials for degarelix and there have been no signs of immediate or late-onset systemic allergic re
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Contact: Annette Whibley
wizard.media@virgin.net
Wiley-Blackwell
Source:Eurekalert

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