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Characterization of the Adherence Threshold for HIV Suppression of a Kaletra-based Regimen

HIV Infection Clinical Trial

Official title:
Characterization of the Adherence Threshold for HIV Suppression of a Kaletra-based Regimen

Clinical Trial Summary

The hypothesis of this study is that the level of adherence necessary to achieve HIV virologic suppression with a ritonavir boosted protease inhibitor regimen (i.e. lopinavir/ritonavir) is less than the 95% rate observed in the published literature with unboosted regimens.

Clinical Trial Description

The existing dogma is that patients receiving highly active antiretroviral therapy (HAART) to treat their HIV infection must take at least 95% of prescribed doses in order to maintain full suppression of viral replication. This belief is largely based on a single study that was performed between 1997 and 1999 (Ann Int Med 2000;133:21-30). The vast majority of patients in this study were receiving regimens based on either indinavir, nelfinavir, ritonavir, or saquinavir. All of these agents have relatively short half-lives, and therefore must be taken on time two or three times per day. Newer medications such as lopinavir/ritonavir (Kaletra) feature much more favorable pharmacokinetic profiles. On the basis of improved pharmacokinetics, there is reason to believe that regimens built around such agents may be more forgiving of missed medication doses.

This study aims to enroll 90 patients from the MMC I.D. Clinic who are either receiving or are about to receive Kaletra. Patients who agree to participate will be furnished with a MEMS cap, a bottle cap that electronically records each time that the bottle is opened and stores the data for computer download, and will undergo electronic monitoring of their Kaletra adherence for a period of siz months. Adherence data will not be reviewed during the study, but at study end (and at interim time points), the investigators will analyze the MEMS cap data from patients who have completed the study in order to determine the threshold value of adherence necessary to achieve satisfactory rates (i.e. 70-80%) of complete virologic suppression.

An additional aim of the study is to collect specimens from patients receiving Kaletra based regimens who experience virologic failure and to archive them for possible studies of genotypic and phenotypic resistance in the future. ;

Study Design

Observational Model: Cohort, Time Perspective: Prospective

Related Conditions & MeSH terms

Clinical Trial Details
NCT number NCT00200369
Study type Observational
Source Montefiore Medical Center
Contact
Status Completed
Phase Phase 4
Start date May 2004
Completion date March 2006
View Details
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