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  • Title: Efficacy and safety of ritonavir/indinavir 100/400 mg twice daily in combination with two nucleoside analogues in antiretroviral treatment-naive HIV-infected individuals.
    Author: Duvivier C, Myrto A, Marcelin AG, Ghosn J, Ait-Mohand H, Schneider L, Agher R, Bricaire F, Costagliola D, Calvez V, Peytavin G, Katlama C.
    Journal: Antivir Ther; 2003 Dec; 8(6):603-9. PubMed ID: 14760894.
    Abstract:
    OBJECTIVE: To evaluate the efficacy and tolerability of indinavir/ritonavir (IDV/RTV) 400/100 mg twice daily in combination with two nucleoside reverse transcriptase inhibitors in antiretroviral-naive patients. DESIGN AND METHODS: Antiviral therapy-naive patients with plasma HIV-1 RNA > 5000 copies/ml were enrolled in this pilot, single-arm study. CD4 cell count and viral load were evaluated at weeks (W) 4, 12, 24 and every 3 months until W48. The primary end-point was the percentage (%) of patients with viral load < 400 copies/ml at W48. Intent-to-treat (ITT) (missing values or change in treatment equalled failure) and on-treatment (OT) analyses were performed. RESULTS: Forty patients were enrolled. Baseline median viral load was 5.36 log10 copies/ml, median CD4 count was 84 cells/mm3. At W48 by ITT analysis, the % patients with viral load < 400 copies/ml was 65% (95% CI: 48-79) and 50% (95% CI: 35-65) with viral load < 50 copies/ml, and 96% (26/27) (95% CI: 89-100) and 74% (95% CI: 57-91], respectively, by OT analysis. The median decrease in viral load at W48 was -3.83 log10 copies/ml (-0.1; -5.19) and the median increase in CD4 was +167 cells/mm3 (6-474 cell/mm3). At W4 (34/40), the median IDV C(min) was 500 ng/ml (range 5-8100) with 91% of patients with an adequate IDV C(min) > 150 ng/ml. Ten patients discontinued the study treatment before W48: adverse events (eight), patient's will (one) and simplification of therapy (one). Three patients were lost to follow-up. Only one virological failure occurred and was associated with poor compliance and sub-optimal concentrations of IDV/RTV. CONCLUSIONS: IDV/RTV 400/100 mg twice daily is an effective and safe first-line antiretroviral therapy. The simplicity and the low cost of IDV/RTV is of major interest particularly in countries with limited resources.
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