A Randomized Trial of 2 Different 4‐Drug Antiretroviral Regimens versus a 3‐Drug Regimen, in Advanced Human Immunodeficiency Virus Disease

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Abstract
To compare long-term virologic benefits of antiretroviral regimens in persons with advanced human immunodeficiency virus (HIV) disease, a randomized, open-label study was conducted of 517 subjects with no or limited previous experience with antiretroviral therapy. Subjects received lamivudine plus zidovudine and indinavir (indinavir group), efavirenz plus indinavir (efavirenz + indinavir group), or nelfinavir plus indinavir (nelfinavir + indinavir group) and were monitored for 2.1 years. Virologic failure was lower in the efavirenz + indinavir group (P=.04) and higher in the nelfinavir + indinavir group (P=.006), compared with that in the indinavir group. No difference in grade 3 or 4 adverse event rates in the efavirenz + indinavir group (P=.97) and a trend toward an increased rate in the nelfinavir + indinavir group (P=.07), compared with the indinavir group, were noted. A 4-drug regimen containing efavirenz plus indinavir resulted in a superior virologic response, whereas one containing nelfinavir plus indinavir resulted in an inferior response and a greater likelihood of toxicity

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