The purpose of this study is to evaluate the pharmacokinetics, safety, and potential for drug-drug interactions when a strong inhibitor of CYP3A4 (ie, ketoconazole) is co-administered with abiraterone acetate in healthy adult men.
This is a non-randomized (individuals will not be assigned by chance to study treatments), open-label (individuals will know the identity of study treatments), 2-period, sequential-design, drug-drug interaction study of abiraterone acetate and ketoconazole in approximately 20 healthy adult men. This study will consist of a screening period followed by an open-label treatment phase consisting of 2 treatment periods. Successive drug administration will be separated by a washout period of at least 10 days. All individuals will receive study treatment in the same sequence. Period 1 (Days 1 to 4) consists of a single oral dose of 1000 mg abiraterone acetate tablets on Day 1 only. Period 2 (Days 11 to 17) consists of a daily oral dose of 400 mg ketoconazole tablets on Days 11 to 16 and administration of a single dose of 1000 mg abiraterone acetate on Day 14. Serial pharmacokinetic (study of what the body does to a drug) samples will be collected at each treatment period as detailed in the protocol. Safety will be monitored continuously from the time of informed consent signing until the end of the study.
Study Type
INTERVENTIONAL
Allocation
NA
Purpose
TREATMENT
Masking
NONE
Enrollment
20
1000 mg abiraterone acetate tablet administered orally on Day 1
400 mg ketoconazole tablets administered orally on Days 11 to 16
1000 mg abiraterone acetate tablet administered orally on Day 14
Unnamed facility
Merksem, Belgium
Mean plasma concentrations of abiraterone
Time frame: Up to Day 17
Mean plasma concentrations of ketoconazole
Time frame: Up to Day 14
Maximum plasma concentrations of abiraterone
Time frame: Up to Day 17
Time to reach the maximum plasma concentration of abiraterone
Time frame: Up to Day 17
Area under the plasma concentration-time curve from time 0 to time to the last quantifiable concentration of abiraterone
Time frame: Up to Day 17
Area under the plasma concentration-time curve from time 0 to infinite time of abiraterone
Time frame: Up to Day 17
Elimination half-life associated with the terminal slope of the semilogarithmic drug concentration-time curve of abiraterone
Time frame: Up to Day 17
First-order rate constant associated with the terminal portion of the curve of abiraterone
Time frame: Up to Day 17
Time to last quantifiable plasma concentration of abiraterone
Time frame: Up to Day 17
Percentage of area under the plasma concentration-time curve from time 0 to infinite time obtained by extrapolation of abiraterone
Time frame: Up to Day 17
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The number of participants affected by an adverse event
Time frame: Up to end of study or early withdrawal