NCT00828789

VX-950-TiDP24-C134: Drug-drug Interaction Trial Between Combination of Efavirenz and Tenofovir Disoproxil Fumarate and Different Dosages of Telaprevir on Healthy Volunteer

A Phase I, Open-label, Randomized, Crossover Trial in 20 Healthy Subjects to Investigate the Pharmacokinetic Interactions Between the Combination of Efavirenz and Tenofovir Disoproxil Fumarate and Different Dosages of Telaprevir.

• Status: Completed
• Phase: Phase 1
• Study type: Interventional
• Enrollment: 20 (actual)
• Sponsor: Tibotec BVBA · Industry
• Sex: All
• Age: 18 Years – 55 Years
• Healthy volunteers: Accepted

Summary

The purpose of this study is to determine the effect of EFV (Efavirenz) and TDF (Tenofovir disoproxil fumarate) on the pharmacokinetics of TVR (Telaprevir) and to determine the effect of TVR on the pharmacokinetics of EFV and TDF. Pharmacokinetics means how the drug is absorbed into the bloodstream, distributed in the body and eliminated from the body. Furthermore, the short-term safety and tolerability of giving TVR, EFV and TDF together will be evaluated.

Detailed description

The trial will enroll 20 Healthy volunteers. All participants will receive 4 different treatments: Treatment A: TVR every 8 hours alone for 6 days with an additional morning intake on Day 7. Treatment B: EFV + TDF once daily alone for 7 days. Treatment C: TVR every 8 hours + EFV once daily + TDF once daily for 7 days. Treatment D: TVR every 12 hours + EFV once daily + TDF once daily for 7 days. All participants will start with Treatment A followed by a 7 or 8-day washout period. Subsequently, participants will start with Treatment B. At the end of Treatment B, participants will be randomized (this is assigned to one of the two sequences by chance) to continue without a washout period with Sequence 1 (Treatment C followed by D without a washout) or Sequence 2 (Treatment D followed by C without a washout). Participants will thus receive daily EFV and TDF for a total of 21 consecutive days, with addition of 2 different dosages of TVR for the last 14 days. TVR will be taken with food, 30 minutes after the start of a meal. EFV and TDF should be taken on an empty stomach (2.5 hours after start of breakfast). Pharmacokinetic profiles of TVR and VRT-127394 (R-diastereomer of TVR) will be measured up to 8 hours after intake of the morning dose on Day 7 of Treatments A and C, and up to 12 hours after intake of the morning dose on Day 7 of Treatment D. Pharmacokinetic profiles of EFV and tenofovir will be measured up to 24 hours after intake on Day 7 of Treatments B, C, and D. Safety and tolerability evaluations will be recorded at regular intervals throughout the trial period. Treatment A: TVR every 8 hours alone for 6 days with an additional morning intake on Day 7. Treatment B: EFV + TDF once daily alone for 7 days. Treatment C: TVR every 8 hours + EFV once daily + TDF once daily for 7 days. Treatment D: TVR every 12 hours + EFV once daily + TDF once daily for 7 days.

Conditions

• Hepatitis C
• HCV
• HIV
• AIDS

Interventions

Type	Name	Description
DRUG	Efavirenz; Tenofovir disoproxil fumarate; Telaprevir

Timeline

• Start date: 2009-02-01
• Primary completion: 2009-04-01
• Completion: 2009-04-01
• First posted: 2009-01-26
• Last updated: 2010-12-17