Study of VX-770 and Rifampin in Healthy Male Subjects

An Open-Label Phase 1 Study to Examine the Effect of Multiple Doses of Rifampin on the Single-Dose Pharmacokinetics of VX 770 in Healthy Subjects

The objectives of this study are to evaluate the effects of multiple doses of rifampin on the single-dose pharmacokinetics of VX 770.

This is a single-center, nonrandomized, open-label, 2-period, 1-sequence crossover study to investigate the safety, tolerability and pharmacokinetics of VX 770 when administered alone or with rifampin.

All enrolled subjects will receive the same treatments and undergo the same procedures. In Period 1, subjects will receive a single dose of VX 770 on Day 1. In Period 2, subjects will receive a daily dose of rifampin on Days 1 through 10 and a single dose of VX 770 on Day 6.

Inclusion Criteria:

• Subject must be male and between 18 and 55 years of age
• Subject must have a body mass index (BMI) from 18 to 30 kg/m2

Exclusion Criteria:

• History of any illness or condition that, in the opinion of the investigator might confound the results of the study or pose an additional risk in administering study drug to the subject
• Subjects who have active tuberculosis, human immunodeficiency virus, hepatitis C, or active hepatitis B