Co-Administration Of Fosamprenavir With Methadone: A Drug Interaction Study.

NCT ID: NCT00481182

Last Updated: 2009-02-23

Basic Information

• Recruitment Status: COMPLETED
• Clinical Phase: PHASE1
• Total Enrollment: 20 participants
• Study Classification: INTERVENTIONAL
• Study Start Date: 2005-02-28

Brief Summary

To assess the combined effects of fosamprenavir 700mg BID + ritonavir 100mg BID + standardized dose of methadone, on plasma total and unbound methadone enantiomer pharmacokinetics (PK), opiate pharmacodynamic (PD) measures, and safety. The effect of methadone on plasma amprenavir PK will also be assessed by comparison to historical control data.

Conditions

Healthy Subjects

Study Design

• Allocation Method: NON_RANDOMIZED
• Intervention Model: SINGLE_GROUP
• Primary Study Purpose: TREATMENT
• Blinding Strategy: NONE

Interventions

fosamprenavir + ritonavir + methadone

Intervention Type: DRUG

Eligibility Criteria

Inclusion Criteria

• Subject is enrolled in a certified methadone maintenance program for at least 12 weeks prior to Period 1, Day 1.

Subject is receiving methadone = 200mg QD that has remained unchanged for 30 days The subject is male, female and is between the age of 18 and 64 years of age.

A female is eligible to enter and participate if she is of non-childbearing potential or of childbearing potential. If of childbearing potential, females must have a negative serum pregnancy test at Screening, and agree to one of the following:

Complete abstinence from sexual intercourse from 2 weeks prior to administration of the study drug. Sexual intercourse with only vasectomized partner.

Body mass index of 19.00 to 32.00 kg/m2. Willing to refrain from the use of illicit drugs and adhere to other protocol-stated restrictions while participating in the study.

Able to understand and comply with protocol requirements and instructions and is likely to complete the study as planned.

Able to give written informed consent prior to screening.

Exclusion Criteria

• Subject has a clinically significant abnormality identified on the screening medical or laboratory evaluation, including 12-lead ECG.

Subject has any preexisting condition which could interfere with the absorption, metabolism, and/or excretion of the study drugs.

Subject currently has or has a history of decompensated liver disease (i.e., ascites, esophageal or rectal varices, hepatic encephalopathy) or current evidence of active hepatitis (AST or ALT > 2.5x ULN).

Subject has evidence of liver impairment at screening (i.e., INR > 1.7, total bilirubin >2.0 mg/dL, albumin <3.5 g/dL).

Subject has inadequate venous access. Subject has a history of any hypersensitivity reaction to any component of FPV, APV, RTV, or to any drug chemically related to FPV, APV, or RTV.

• Minimum Eligible Age: 18 Years
• Maximum Eligible Age: 64 Years
• Eligible Sex: ALL
• Accepts Healthy Volunteers: Yes

Sponsors

GlaxoSmithKline

INDUSTRY

Sponsor Role: lead

Responsible Party

GSK

Principal Investigators

GSK Clinical Trials, MD

Role: STUDY_DIRECTOR

GlaxoSmithKline

Locations

GSK Investigational Site

Baltimore, Maryland, United States

GSK Investigational Site

Buffalo, New York, United States

Countries

United States

Other Identifiers

102577

Identifier Type: -

Identifier Source: org_study_id