OBJECTIVES:
* Determine the safety of atrasentan in patients with hormone-refractory prostate cancer.
* Determine the pharmacokinetics of this drug in these patients.
OUTLINE: This is an open-label, multicenter study.
Patients receive oral atrasentan once daily for 3 years in the absence of disease progression or unacceptable toxicity.
Patients are followed at 1 month and then every 3 months for 2 years.
PROJECTED ACCRUAL: Approximately 1,400 patients will be accrued for this study.