TMC435-TiDP16-C108 - A Study in Healthy Volunteers Investigating the Pharmacokinetic Interaction Between TMC435 and Digoxin and Between TMC435 and Rosuvastatin

Overview

The purpose of this study is to investigate the effect of steady-state concentrations of TMC435 on the single-dose pharmacokinetics of digoxin or rosuvastatin , and the effect of a single dose of digoxin or rosuvastatin on the steady-state pharmacokinetics of TMC435. Steady state is a term that means that the drug has been given long enough so that the plasma concentrations will remain the same with each subsequent dose. TMC435 is being investigated for the treatment of chronic hepatitis C virus (HCV) infection. Pharmacokinetics (PK) means how the drug is absorbed into the bloodstream, distributed in the body, and eliminated from the body.

TMC435 is being investigated for treatment of chronic hepatitis C virus (HCV) infection, in combination with Peg-IFN (pegylated interferon) and RBV (ribavirin). Digoxin and rosuvastatin are expressed in the liver and intestine and mediate the transport of drugs out of the blood circulation. The result of this study will provide dosing recommendations for TMC435 and for digoxin, rosuvastatin, or other substrates using the same drug transporter molecules, when being coadministered. This is a Phase I, open-label (both participant and investigator know the name of the medication given at certain moment), randomized (sequence of treatment with study medications is assigned by chance), crossover trial in 32 healthy volunteers to investigate the pharmacokinetic interaction between TMC435, at steady state, and digoxin or rosuvastatin at a single dose. The volunteers will be allocated to one of two panels. In Panel 1, volunteers will receive two treatments (Trts A and B) in a randomized order. Volunteers will receive digoxin 0.25 mg once daily for 1 day (Trt A) and TMC435 150 mg once daily for 7 days (Trt B) and 0.25 mg digoxin once daily for 1 day (Trt B). In Panel 2, volunteers will receive two treatments (Trts C and D) in a randomized order. Volunteers will receive rosuvastatin 10 mg once daily for 1 day (Trt C) and TMC435 150 mg once daily for 7 days (Trt D) and rosuvastatin 10 mg once daily for 1 day (Trt D). In both panels, there will be a washout period (a period when no study drug will be taken, in order to have all the medication eliminated from the body before starting a new treatment) of at least 14 days between last intake of the study medication in one session and the first intake of study medication in the subsequent session. Pharmacokinetic profiles of all three compounds will be determined through blood samples taken at regular intervals during the study. Safety and tolerability will be assessed during the study period and during follow up. Blood and urine samples, electrocardiogram (ECG) and vital signs (blood pressure and heart rate) will be taken at screening, before medication intake on Day -1 or Day 1 (Trts A, B, C, and D), on Day 2 (Trts A and C), before medication intake and 6 hours postdose (only vital signs and ECG) on Day 7 (Trts B and D), on Day 8 (Trts B and D) and at the 2 follow up visits at 1 week and 4-5 weeks after last dose of study medication in the last session. A physical examination will be performed at screening, on Day -1 (= day before first medication intake in each session for both panels) and on Day 2 in Trts A and C, on Day -1 and on Day 8 of Trts B and D and during the 2 follow-up visits. Each volunteer is part of one panel and follows 2 treatment (Trt) periods, which are a minimum 14 days apart from each other. Trt period for Trts A and C - 5 days; Trt period for Trts B and D - 11 days. Trt A and B = Panel 1, Trt C and D = Panel 2. A single, oral dose of digoxin (0.25 mg) or rosuvastatin (10 mg) to be given in Trt A or Trt C, respectively. Multiple doses of TMC435 (150 mg) for 7 days to be given in TrtB and D, with a single dose of digoxin or rosuvastatin on Day7, respectively.