A Study That Provides Long-term Safety Follow-up and Examines Long-term Exposure to Abiraterone Acetate

Study Overview
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Brief Summary
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The purpose of this study is to collect follow-up safety data from participants in completed abiraterone acetate studies for a maximum duration of 9 years.

Detailed Description
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This is a nonrandomized (individuals will not be assigned by chance to study treatments), open-label (individuals will know the identity of study treatments), long-term safety follow-up study of abiraterone acetate in approximately 300 patients from other completed abiraterone acetate clinical studies. Patients must have received at least 3 months of treatment with abiraterone acetate and a low-dose corticosteroid and, based on investigator assessment, may benefit from continued treatment. This study will consist of a screening period followed by open-label treatment of continued abiraterone acetate access. The patients will continue with the same abiraterone acetate and low-dose corticosteroid dosing regimen they were receiving in the previous abiraterone acetate clinical study until the investigator determines that the patient is no longer receiving benefit or the sponsor terminates the study. Patients can be withdrawn from the study if an alternative access (eg, patient-assistance program or commercial source of abiraterone acetate) is available and feasible. Each cycle of treatment will be 28 days. Investigators will monitor and assess the patients for response to treatment or progression according to routine practice or as clinically indicated to determine whether continued treatment with abiraterone acetate is warranted. No efficacy data are being collected. Safety will be monitored throughout the study for a maximum duration of 9 years. End-of-study assessments will be performed at least 30 days after the last dose of abiraterone or upon early withdrawal.

Official Title
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A Phase 3b Multicenter, Open-label Abiraterone Acetate Long-term Safety Study

Conditions
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Metastatic Castration-resistant Prostate Cancer, Metastatic Breast Cancer

Intervention / Treatment
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* Drug: Abiraterone acetate
* Drug: Prednisone


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Currently participating in an abiraterone acetate clinical study considered complete and had received at least 3 months of treatment with abiraterone acetate tablets. Exclusion Criteria: Medical conditions that require hospitalization. Any condition or situation which, in the opinion of the investigator, may put the patient at significant risk, may confound the study results, or may interfere significantly with the patient's participation in the study.
Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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No

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Treatment
Intervention Model: Single Group Assignment
Masking: None (Open Label)


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Experimental: Abiraterone acetate<br>Patients will continue the same treatment regimen they were receiving during their participation in the previous abiraterone acetate clinical study. | Drug: Abiraterone acetate<br>* Type=exact number, unit=mg, number=1000, form=tablet, route=oral, abiraterone acetate once daily<br>Drug: Prednisone<br>* Type=exact number, unit=mg, number=5, form=tablet, route=oral, prednisone or prednisolone twice daily<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Number of Participants With Serious Adverse Events (SAEs) | An SAE is defined as any untoward medical occurrence that results in death, is life-threatening, requires inpatient hospitalization or prolongation of existing hospitalization, results in persistent or significant disability/incapacity, leads to a congenital anomaly/birth defect in the offspring of a participant, or is an important medical event. | Up to 9 years | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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Low-dose corticosteroid treatment, Long-term access, Metastatic castration-resistant prostate cancer, Metastatic breast cancer, Abiraterone acetate