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  • Title: Low efficacy and high frequency of adverse events in a randomized trial of the triple nucleoside regimen abacavir, stavudine and didanosine.
    Author: Gerstoft J, Kirk O, Obel N, Pedersen C, Mathiesen L, Nielsen H, Katzenstein TL, Lundgren JD.
    Journal: AIDS; 2003 Sep 26; 17(14):2045-52. PubMed ID: 14502007.
    Abstract:
    BACKGROUND: Highly active antiretroviral therapy containing three nucleoside reverse transcriptase inhibitors has been somewhat successful, but the clinical efficacy is unclear. METHODS: Randomized, controlled, open-label trial of 180 antiretroviral drug-naive HIV-infected patients allocated to a regimen of abacavir, stavudine and didanosine (A/S/D, n = 60), ritonavir and saquinavir (R/S 400/400 mg twice daily; n = 60) or nelfinavir and nevirapine (N/N 1250/200 mg twice daily; n = 60); the latter two in combination with lamivudine and zidovudine. The primary endpoint was HIV plasma RNA < or = 20 copies/ml after 48 weeks. RESULTS: At baseline, the median CD4 cell count was 161 x 106 cells/l (range, 0-920) and the HIV RNA was 5.0 log10 copies/ml (range, 2.7-6.7). At 48 weeks, 43% in the A/S/D arm had a HIV RNA < or = 20 copies/ml, compared with 69% in the N/N arm (P < 0.01) and 62% in the R/S arm (P < 0.05). In a multivariate analysis, the A/S/D arm had an odds ratio of obtaining a viral load of < or = 20 copies/ml at week 48 of 0.25 [95% confidence interval (CI) 0.10-0.59] versus N/N and 0.53 (95% CI, 0.33-0.83) versus R/S. The A/S/D arm had a particularly poor outcome in patients with higher viral load and AIDS at baseline: 63% had to discontinue A/S/D (any drug). Side effects were more frequent in the A/S/D arm and included neuropathy 27%, suspicion of hypersensitivity 12%, and increase in lactate accompanied by systemic symptoms 8%. CONCLUSION: The A/S/D regimen had a low efficacy and a high frequency of adverse events and cannot be recommended.
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