Drug Interaction Study Of Filibuvir With Methadone Among Subjects On Chronic Methadone Maintenance

Open Label Single Sequence Study To Estimate The Effect Of Filibuvir (PF-00868554) On S-And R-Methadone In Subjects Receiving Chronic Methadone Treatment And To Evaluate The Pharmacokinetics Of Filibuvir

Filibuvir, a CYP3A4 inhibitor is being developed for the treatment of chronic Hepatitis C infection. Given the likelihood of co administration of filibuvir and methadone, this study will evaluate the effect of filibuvir on the pharmacokinetics of R/S Methadone.

Inclusion Criteria:

• Males or females, without evidence of infection with HIV,HBV or HCV, who are on chronic methadone maintenance for at least three months and at a stable dose for at least 1 week prior to study start.

Exclusion Criteria:

• Evidence of chronic diseases including HIV, HBV or HCV.
• Evidence of acute or chronic liver disease.
• Treatment with prescription or nonprescription drugs other than methadone within 7 days.