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Clinical Trial Summary

This study evaluates how a drug that alters liver enzymes (rifampin) affects the metabolism of enzalutamide in men by measuring concentrations of enzalutamide and its metabolites in plasma.


Clinical Trial Description

The study consists of 2 randomized treatment arms. In both arms the subjects receive a single oral dose of enzalutamide.

In Arm 1 the subjects are admitted to the clinic on Day -1 where they remain until Day 3. Each subject receives a single oral dose of enzalutamide, administered under fasted conditions on Day 1. Ambulant visits take place from Day 4 to Day 50. Full PK profiles are obtained for enzalutamide, Major Inactive Carboxylic Acid Metabolite (M1) and Active Metabolite N-desmethyl Enzalutamide (M2) from Day 1 up to Day 50 after intake of enzalutamide.

In Arm 2 each subject receives a once-daily dose of rifampin on Days 1 to 21. On Day 8, a single oral dose of enzalutamide is administered under fasted conditions concomitantly with rifampin. Full PK profiles are obtained for enzalutamide, M1 and M2 from Day 8 up to Day 57 after intake of enzalutamide.

An End of Study Visit (ESV) takes place between 7 and 10 days after the last PK sample or early withdrawal.

Safety assessments are performed throughout the study. ;


Study Design

Allocation: Randomized, Endpoint Classification: Pharmacokinetics Study, Intervention Model: Parallel Assignment, Masking: Open Label, Primary Purpose: Basic Science


Related Conditions & MeSH terms


NCT number NCT02138799
Study type Interventional
Source Astellas Pharma Inc
Contact
Status Completed
Phase Phase 1
Start date July 2013
Completion date September 2013

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