ALternative TEnofovir Dosing in Adults With Moderate Renal Function Impairment (ALTER)

French Public Scientific and Technological Institution (EPST)

Status and phase

Completed

Phase 1

Conditions

HIV

Treatments

Other: Tenofovir Dose Adjustment

Study type

Interventional

Funder types

Other

Identifiers

NCT01671982

ALTER

Details and patient eligibility

About

To assess the drug concentrations of tenofovir (TDF) in HIV-infected Thai adults with moderate renal function impairment when administered at the recommended dose of 300 mg every 48 hours, and at an alternative dose of 150 mg every 24 hours.

Full description

The study is designed as a Phase I, non-randomized, open-label, pharmacokinetic study. We hypothesize that administration of tenofovir 150 mg once daily to HIV-infected Thai adults with moderate renal function impairment (CLcr between 30 to <50 mL/min) will provide comparable drug exposure to the current recommended dose of 300 mg every 48 hours.

Confirmed HIV-positive subjects receiving tenofovir (TDF) 300 mg, every 48 hours, as part of an NNRTI-based or lopinavir/ritonavir (LPV/r)-based HAART regimen will be proposed to participate.

Subjects meeting the required criteria will be enrolled into one of 2 groups depending on their HAART regimen: .

Group 1: Subjects receiving tenofovir 300 mg, every 48 hours, in combination with lamivudine and an NNRTI,and a confirmed CLcr 30 to <50 mL/min

Group 2: Subjects receiving tenofovir 300 mg, every 48 hours, in combination with lamivudine and lopinavir/ritonavir, and a confirmed CLcr 30 to <50 mL/min

The study procedures are identical for both groups. All subjects enrolled will have two study visits. At the first visit, a 48-hour pharmacokinetic evaluation will be performed. Immediately following completion of the PK sampling, the tenofovir dose will be changed to 150 mg, once daily. Two weeks later, at the second visit, a 24-hour pharmacokinetic evaluation will be performed. Following completion of the second PK sampling the tenofovir dose will be changed back to 300 mg every 48 hours. At this time the subjects has reach the end of the study.

Enrollment

40 patients

Sex

All

Ages

18+ years old

Volunteers

No Healthy Volunteers

Inclusion criteria

age >18 years old
provided written informed consent
receiving the tenofovir tablet formulation from the Thai Government Pharmaceutical Organization (GPO) for at least 4 weeks before enrollment
documentation of confirmed HIV-1 infection (documented by two serology tests obtained at two different dates)
Confirmed Creatinine clearance result between 30 to <50 mL/min [confirmed defined as two CLcr determinations calculated using the Cockcroft-Gault equation within two weeks of each other, within 1 month prior to entry]
received tenofovir 300 mg, every 48 hours for at least 2 weeks prior to entry, in combination with 3TC plus NNRTI, or 3TC plus lopinavir/ritonavir
a HIV-1 RNA viral load < 50 copies/mL within 6 months prior to entry

Exclusion criteria

Concomitant use of a atazanavir, didanosine
Pregnant
Any of the following laboratory tests within 30 days prior to study entry classified as ≥ Grade 3 (see DAIDS Table for Grading the Severity of Adult and Pediatric Adverse Events, Version 1.0 [Dec. 2004], Clarification August, 2009): neutrophil count, hemoglobin, platelets, AST, or ALT
HBs-antigen positive
Any clinically significant diseases (other than HIV-1 infection) or clinically significant findings during the screening medical history or physical examination that, in the investigator's opinion, would compromise participation in this study
concurrent participation to any other clinical trial without prior agreement of the two study teams