IMPORTANCE Worldwide, the nonnucleoside reverse transcriptase inhibitors (NNRTIs) efavirenz and nevirapine are commonly used in first-line antiretroviral regimens in both adults and children with human immunodeficiency virus (HIV) infection. Data on the comparative effectiveness of these medications in children are limited. OBJECTIVE To investigate whether virological failure is more likely a...

Phenotypic assays measure the susceptibility of HIV-1 to antiretroviral drugs, and are used to guide treatment regimen choices. Analyses of baseline predictors of virological failure support the use of a 0.4-fold cutpoint for defining increased susceptibility (hypersusceptibility) to efavirenz in the PhenoSense HIV assay. The enhancement of the virological activity of efavirenz, associated with...

Study of plasma and intracellular concentrations of atazanavir, lopinavir, nevirapine, and efavirenz was conducted on 48 patients under short cycles of antiretroviral therapy. Intracellular concentrations (IC) were still measurable for all drugs after 85 h or 110 h drug intake despite the absence of drug in plasma for atazanavir and lopinavir. A linear relationship between plasma and intracellu...

BACKGROUND Concerns have been raised about efavirenz reducing the effectiveness of contraceptive implants. We aimed to establish whether pregnancy rates differ between HIV-positive women who use various contraceptive methods and either efavirenz-based or nevirapine-based antiretroviral therapy (ART) regimens. METHODS We did this retrospective cohort study of HIV-positive women aged 15-45 year...

BACKGROUND Limited data compare once-daily options for initial therapy for HIV-1. OBJECTIVE To compare time to virologic failure; first grade-3 or -4 sign, symptom, or laboratory abnormality (safety); and change or discontinuation of regimen (tolerability) for atazanavir plus ritonavir with efavirenz-containing initial therapy for HIV-1. DESIGN A randomized equivalence trial accrued from Se...

OBJECTIVE To determine the efficacy of efavirenz introduction in first-line HAART compared with salvage multidrug regimens. PATIENTS AND METHODS Prospective 15 month comparison of 107 consecutive HIV-infected patients starting efavirenz, according to laboratory and clinical outcome of first-line versus rescue drug use, therapeutic history and association of selected antimicrobial agents: naiv...

The introduction of antiretroviral drugs (ARVd) changed the prognosis of HIV infection from a deadly disease to a chronic disease. However, even with undetectable viral loads, patients still develop a wide range of pathologies, including cerebrovascular complications and stroke. It is hypothesized that toxic side effects of ARVd may contribute to these effects. To address this notion, we evalua...

The potency of 2 nucleoside reverse transcriptase inhibitors (NRTIs) and efavirenz in patients with higher viral loads (VLs) or low CD4 cell counts remains uncertain. Virologic failure and changes in CD4 count in relation to pretreatment VL and CD4 count were evaluated in treatment-naive patients randomized to treatment groups that received 2 or 3 NRTIs with efavirenz. Over 3 years, the risk of...

This study presents unique data on concentrations of antiretroviral drugs, (abacavir, nevirapine, and efavirenz) in the root, leaf, fruit vegetables. The microwave-assisted extraction, solid-phase liquid chromatography coupled with photodiode array detection were applied to assess drugs vegetable samples. analytical method showed high precision linearity (R2) greater than 0.99, acceptable, accu...