This trial was an open-label, randomized, parallel treatment, active-control multicenter study in adult males with documented metastatic prostate cancer disease who were judged to be candidates for hormone therapy.~Within 21 days prior to implant insertion, all prospective enrollees were entered into a screening period to provide medical history, demographic information, physical examination, laboratory evaluations, 12-lead ECG, bone scan, chest x-ray, liver ultrasound, concomitant medications and procedures, and a physician assessment including pain level and WHO performance scale in order to assess eligibility for the study. Written informed consent was obtained before any procedures were undertaken.~Once inclusion/exclusion criteria were met, baseline evaluations (physical assessment and examination, vital signs and weight, clinical laboratory evaluations, concomitant medications and procedures, adverse events, and a Quality of Life questionnaire) were obtained prior to implant insertion on Day 1 [Visit 1]. All appropriately screened patients were to then receive either histrelin acetate 50-mg or Zoladex 3-Month 10.8 mg implant based on 1:1 randomization at Day 1 [Visit 1]. Patients with implants were evaluated at Week 1 and 2 [Visits 2 and 3] post-insertion for testosterone and PSA concentrations, vital signs, adverse events, and concomitant medications and procedures. The Zoladex implants were replaced at Weeks 12, 24, 36, and 48 [Visits 6, 9, 12, and 15], while the histrelin acetate implants were replaced at Week 52 (Visit 16), respectively. Patients were followed monthly from Weeks 4 to 60 [Visits 4 to 18] to evaluate testosterone and PSA concentrations, adverse events, concomitant medications and procedures, disease progression, and urine and serum histrelin in the renal/hepatic impairment subgroup. Periodic clinical and subjective assessments were completed for all patients.
This trial was an open-label, multi-national, randomized, parallel treatment, active-control multicenter study in adult males with documented metastatic prostate cancer disease who were judged to be candidates for hormone therapy.