VX-950-TiDP24-C124: A Phase I Trial to Investigate the Potential Pharmacokinetic Interactions Between Telaprevir and Darunavir/Ritonavir and Between Telaprevir and Fosamprenavir/Ritonavir at Steady-state.

HIV Clinical Trial

Official title: A Phase I, Open-label, Randomized, 2-way Crossover Trial in 40 Healthy Subjects to Investigate the Potential Pharmacokinetic Interactions Between Telaprevir and Darunavir/Ritonavir and Between Telaprevir and Fosamprenavir/Ritonavir at Steady-state.

Status Completed

Clinical Trial Summary

The primary objectives are to determine the effect of steady-state DRV/rtv 600/100 mg twice daily (b.i.d.) on the steady-state pharmacokinetics of telaprevir 750 mg every (q) 8h and 1125 mg q12h and vice versa;- to determine the effect at steady-state of fAPV/rtv 700/100 mg b.i.d. on the steady-state pharmacokinetics of telaprevir 750 mg q8h and 1125 mg q 12h and vice versa; to determine the steady-state pharmacokinetics of telaprevir 750 mg q8h versus telaprevir 1125 mg q12h, alone and during coadministration of either steady-state DRV/rtv 600/100 mg b.i.d or fAPV/rtv 700/100 mg b.i.d.

Clinical Trial Description

This is a Phase I, open-label, randomized (patients are assigned different treatments based on chance), 2-way crossover trial in 2 panels of healthy subjects to investigate the effect of steady-state darunavir/ritonavir (DRV/rtv) 600/100 mg b.i.d. (twice a day) or fosamprenavir/ritonavir (fAPV/rtv) 700/100 mg b.i.d. on the steady state pharmacokinetics (study of the bodily absorption, distribution, metabolism, and excretion of drugs) of telaprevir 750 mg q 8h and 1125 mg q12h, and vice versa.Telaprevir is being investigated for the treatment of HCV infection.The trial will enroll 40 subjects, divided over 2 panels of 20 subjects each. Subjects in Panel 1 will receive Treatments A and B, and subjects in Panel 2 will receive Treatments C and D, in a randomized order. In both panels, treatments will be separated by a washout period of at least 13 days. In Panel 1, Treatment A, subjects will receive telaprevir 750 mg q8h on Days 1 to 10, and telaprevir 1125 mg q12h on Days 11 to 13 with a morning dose on Day 14. In Panel 1, Treatment B, subjects will receive DRV/rtv 600/100 mg b.i.d. on Days 1 to 23, with an additional morning dose on Day 24, with coadministration of telaprevir 750 mg q8h on Days 11 to 20, and 1125 mg q12h on Days 21 to 23 with a morning dose on Day 24. In Panel 2, Treatment C, subjects will receive telaprevir 750 mg q 8h on Days 1 to 10, and telaprevir 1125 mg q12h on Days 11 to 13 with a morning dose on Day 14. In Panel 2, Treatment D, subjects will receive fAPV/rtv 700/100 mg b.i.d. on Days 1 to 23, with an additional morning dose on Day 24, with coadministration of telaprevir 750 mg q8h on Days 11 to 20, and 1125 mg q12h on Days 21 to 23 with a morning dose on Day 24. All intakes of study medication will be under fed conditions. Pharmacokinetic profiles of telaprevir and VRT-127394 (Rdiastereomer of telaprevir) will be measured up to 8 hours after intake of the morning dose on Day 10 of Treatments A and C and on Day 20 of Treatments B and D, and up to 12 hours after intake of the morning dose of Day 14 of Treatments A and C and on Day 24 of Treatments B and D. During Treatment B, pharmacokinetic profiles of DRV and ritonavir will be measured up to 12 hours after intake of the morning dose on Day 10, Day 20 and Day 24. During Treatment D, pharmacokinetic profiles of amprenavir and ritonavir will be measured up to 12 hours after intake of the morning dose on Day 10, Day 20 and Day 24. Safety and tolerability evaluations will be recorded at regular intervals throughout the trial period. Group A/C: telaprevir 750 mg each 8 hrs on Days 1-10, and telaprevir 1125 mg each 12hrs on Days 11-13 with a morning dose on Day 14. Group B: DRV/rtv 600/100 mg 2/day on Days 1-23 + morning dose on Day 24 + telaprevir 750 mg each 8 hrs on Days 11-20, and 1125 mg each 12hrs on Days 21 to 23 + morning dose on Day 24. Group D: fAPV/rtv 700/100 mg 2/day on Days 1-23 + morning dose on Day 24, + telaprevir 750 mg each 8hrs Days 11-20, and 1125 mg each 12hrs on Days 21-23 + morning dose on Day 24. ;

Study Design

Allocation: Randomized, Endpoint Classification: Pharmacokinetics Study, Intervention Model: Crossover Assignment, Masking: Open Label, Primary Purpose: Treatment

Related Conditions & MeSH terms

• Hepatitis C
• HIV
• Telaprevir

• NCT number: NCT00775125
• Study type: Interventional
• Source: Tibotec BVBA
• Status: Completed
• Phase: Phase 1
• Start date: June 2008
• Completion date: October 2008