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  • Title: Lamivudine in combination with zidovudine, stavudine, or didanosine in patients with HIV-1 infection. A randomized, double-blind, placebo-controlled trial. National Institute of Allergy and Infectious Disease AIDS Clinical Trials Group Protocol 306 Investigators.
    Author: Kuritzkes DR, Marschner I, Johnson VA, Bassett R, Eron JJ, Fischl MA, Murphy RL, Fife K, Maenza J, Rosandich ME, Bell D, Wood K, Sommadossi JP, Pettinelli C.
    Journal: AIDS; 1999 Apr 16; 13(6):685-94. PubMed ID: 10397563.
    Abstract:
    OBJECTIVE: To study the antiviral activity of lamivudine (3TC) plus zidovudine (ZDV), didanosine (ddl), or stavudine (d4T). DESIGN: Randomized, placebo-controlled, partially double-blinded multicenter study. SETTING: Adult AIDS Clinical Trials Units. PATIENTS: Treatment-naive HIV-infected adults with 200-600x10(6) CD4 T lymphocytes/l. INTERVENTIONS: Patients were openly randomized to a d4T or a ddl limb, then randomized in a blinded manner to receive: d4T (80 mg/day), d4T plus 3TC (300 mg/day), or ZDV (600 mg/day) plus 3TC, with matching placebos; or ddl (400 mg/day), ddl plus 3TC (300 mg/day), or ZDV (600 mg/day) plus 3TC, with matching placebos. After 24 weeks 3TC was added for patients assigned to the monotherapy arms. MAIN OUTCOME MEASURE: The reduction in plasma HIV-1 RNA level at weeks 24 and 48. RESULTS: Two hundred ninety-nine patients were enrolled. After 24 weeks the mean reduction in plasma HIV-1 RNA copies/ml from baseline was 0.49 log10 (d4T monotherapy) versus 1.03 log10 (d4T plus 3TC; P = 0.001), and 0.68 log10 (ddl monotherapy) versus 0.82 log10 (ddl plus 3TC; P>0.22). After 48 weeks the mean reduction was 1.08 log10 (d4T plus 3TC) versus 1.01 log10 (ZDV plus 3TC) in the d4T limb (P = 0.66), and 0.94 log10 (ddl plus 3TC) versus 0.88 log10 (ZDV plus 3TC; P = 0.70) in the ddl limb. CONCLUSIONS: 3TC added significantly to the virologic effects of d4T, but not ddl, in treatment-naive patients. 3TC plus d4T produced virologic changes comparable to those of 3TC plus ZDV. These results support the use of 3TC with either ZDV or d4 as a component of initial combination antiretroviral therapy.
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