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Canadian Journal of Infectious Diseases
Volume 14, Issue 4, Pages 201-205
http://dx.doi.org/10.1155/2003/309724
Original Article

Nelfinavir and Non-Nucleoside Reverse Transcriptase Inhibitor-Based Salvage Regimes in Heavily Hiv Pretreated Patients

Jean-Guy Baril,1 Eric A Lefebvre,2 Richard G Lalonde,3 Stephen D Shafran,4 and Brian Conway5

1Clinique Médicale du Quartier Latin, Montreal, Quebec, Canada
2Clinique Médicale L’Actuel, Montreal, Canada
3Royal Victoria Hospital, Montreal, Canada
4University of Alberta Hospital, Edmonton, Alberta, Canada
5University of British Columbia, Vancouver, British Columbia, Canada

Received 4 December 2002; Accepted 14 May 2003

Copyright © 2003 Hindawi Publishing Corporation. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

OBJECTIVE: To assess the efficacy of nelfinavir mesylate (NFV) in combination with delavirdine mesylate(DLV) or efavirenz (EFV) and other antiretroviral agents following virological failure on other protease inhibitor (PI)-based regimens.

DESIGN: Multicentre, retrospective chart review.

METHODS: One hundred-one patients who were naive to both NFV and non-nucleoside reverse transcriptase inhibitors (NNRTIs) and who initiated NFV plus DLV or EFV-based salvage regimens were reviewed. Response to treatmentwas defined as a reduction in HIV ribonucleic acid (RNA) levels to unquantifiable levels (less than 50 copies/mL, less than 400 copies/mL, less than 500 copies/mL) on at least one occasion after the initiation of salvage therapy. Baseline correlates of response, including prior duration of HIV infection, prior number of regimens, viral load and CD4 cell counts were also evaluated.

RESULTS: Patients had a mean duration of HIV infection of 10 years, a mean duration of prior therapy of four years, a median of four prior nucleoside reverse transcriptase inhibitors and a median of two prior PIs. At the time of review the mean duration of salvage therapy was 63.4 weeks. Virological suppression was achieved in 59 (58.4%) patients within a mean of eight weeks and maintained for a mean of 44.9 weeks (themean follow-up was78 weeks). Of the non-responders, 16 (38%) achieved a less than 1 log10 decrease in HIV RNA levels. Although there was no association between baseline correlates, response rate (75.7%) was significantly higher in patients with HIV RNA levels of 50,000 copies/mL or lower and CD4 counts greater than 200 cells/mm3.

CONCLUSION: NFV/NNRTI-based highly active antiretroviral therapy regimens are an effective therapy in many patients who have experienced virological breakthroughs on at least one prior PI-based regimen.