Primary:~To evaluate the effect of Osanetant on testosterone levels in men with prostate cancer within 28 days of therapy.~Secondary:~To evaluate the effect Osanetant on pituitary hormones (LH/FSH) and estrogen within 28 days of therapy.~To evaluate the effect of Osanetant on PSA levels after 28 days (approximately 4 weeks) of therapy.
To evaluate the effect of Osanetant on testosterone levels in men with prostate cancer within 28 days of therapy.