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  • Title: Initiation of antiretroviral therapy: implications of recent findings.
    Author: Saag MS.
    Journal: Top HIV Med; 2004; 12(3):83-8. PubMed ID: 15310939.
    Abstract:
    A number of reports related to initiation of antiretroviral therapy have been reported recently. Available data continue to support the practice of not starting therapy for asymptomatic patients who have CD4+ cell counts above 350/mL, and consideration for initiating antiretroviral therapy below this point, but before the count drops to 200/mL. In terms of initial regimens, some data suggest better virologic response rates with nonnucleoside reverse transcriptase inhibitors (NNRTI)-based regimens than with protease inhibitor-based regimens. The differences are likely due to better tolerability of NNRTI-based regimens. Small studies in treatment-naive patients have shown poor virologic outcome in patients receiving certain regimens, such as abacavir/lamivudine/tenofovir or didanosine/lamivudine/tenofovir. These findings appear to be explained by the differing effects of the reverse transcriptase K65R mutation on different drugs. Other recent studies suggest fewer metabolic adverse effects with emtricitabine-containing treatment than with stavudine-containing treatment, comparable virologic outcomes with once-daily and twice-daily abacavir regimens; comparable virologic outcomes with once-daily and twice-daily lopinavir/ritonavir regimens, and an association between didanosine 400 mg/tenofovir regimens and declines in CD4+ cell counts despite viral suppression. This article summarizes a presentation on initiation of antiretroviral therapy by Michael S. Saag, MD, at International AIDS Society-UsA course in New York in March 2004.
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