Trial reportAntimicrobial agents and chemotherapy2017
Population Pharmacokinetic Modeling To Estimate the Contributions of Genetic and Nongenetic Factors to Efavirenz Disposition.
Trial report in Antimicrobial agents and chemotherapy, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. It is linked to trial NCT00668395 (Effects of CYP2B6 Genetic Polymorphisms on Efavirenz Pharmacokinetics, Autoinduction and Drug Interactions in Healthy Volunteers.), which is not on this map. Cited by 20 papers, 1 of them a synthesis that pooled it.
What it found
Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.
The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Effects of CYP2B6 Genetic Polymorphisms on Efavirenz Pharmacokinetics, Autoinduction and Drug Interactions in Healthy Volunteers.
Who cites it
20 citing papers in PubMed, 1 synthesis or guideline pooled it, 28 citations in OpenAlex.
- Clinical Pharmacogenetics Implementation Consortium (CPIC) Guideline for CYP2B6 and Efavirenz-Containing Antiretroviral Therapy.Clinical pharmacology and therapeutics · 2019Guideline
- A Population Pharmacokinetic Approach to Understand the Effect of Efavirenz on CYP3A Activity in Healthy Volunteers Using Midazolam as a Probe.CPT: pharmacometrics & systems pharmacology · 2025Trial
- Influence of Uridine Diphosphate Glucuronosyltransferase Family 1 Member A1 and Solute Carrier Organic Anion Transporter Family 1 Member B1 Polymorphisms and Efavirenz on Bilirubin Disposition in Healthy Volunteers.Drug metabolism and disposition: the biological fate of chemicals · 2020Trial
- CYP2B6 Genotype-Dependent Inhibition of CYP1A2 and Induction of CYP2A6 by the Antiretroviral Drug Efavirenz in Healthy Volunteers.Clinical and translational science · 2019Trial
- Efavirenz Interacts with Hormones Involved in Appetite and Satiety, Affecting Body Weight in Mice.International journal of molecular sciences · 2026Article
- Pharmacogenetics of steady-state metabolism, pharmacokinetics, and adverse effects of voriconazole in healthy participants.Drug metabolism and disposition: the biological fate of chemicals · 2025Article
- Pharmacokinetic approaches to standardize antiviral exposure in cerebrospinal fluid.Pharmacotherapy · 2025Article
- Population pharmacokinetic analysis identifies an absorption process model for mycophenolic acid in patients with renal transplant.Clinical and translational science · 2024Article
- Genetic and non-genetic factors influencing efavirenz population pharmacokinetics among human immunodeficiency virus-1-infected children in Ethiopia.CPT: pharmacometrics & systems pharmacology · 2023Article
- Article
- Implications of Bariatric Surgery on the Pharmacokinetics of Antiretrovirals in People Living with HIV.Clinical pharmacokinetics · 2022Review
- Large variability in plasma efavirenz concentration in Papua New Guinea HIV/AIDS patients associated with high frequency of CYP2B6 516T allele.Clinical and translational science · 2021Article
- Particle Forming Amorphous Solid Dispersions: A Mechanistic Randomized Pharmacokinetic Study in Humans.Pharmaceutics · 2021Article
- Circulating miRNAs as Biomarkers for CYP2B6 Enzyme Activity.Clinical pharmacology and therapeutics · 2021Article
- Efavirenz Metabolism: Influence of Polymorphic CYP2B6 Variants and Stereochemistry.Drug metabolism and disposition: the biological fate of chemicals · 2019Review
- Model based development of tacrolimus dosing algorithm considering CYP3A5 genotypes and mycophenolate mofetil drug interaction in stable kidney transplant recipients.Scientific reports · 2019Article
- Long-term efavirenz pharmacokinetics is comparable between Tanzanian HIV and HIV/Tuberculosis patients with the same CYP2B6*6 genotype.Scientific reports · 2018Article
- Variants in the CYP2B6 3'UTR Alter In Vitro and In Vivo CYP2B6 Activity: Potential Role of MicroRNAs.Clinical pharmacology and therapeutics · 2018Article
- Efavirenz Therapeutic Range in HIV-1 Treatment-Naive Participants.Therapeutic drug monitoring · 2017Article
- Population Pharmacokinetic Model Linking Plasma and Peripheral Blood Mononuclear Cell Concentrations of Efavirenz and Its Metabolite, 8-Hydroxy-Efavirenz, in HIV Patients.Antimicrobial agents and chemotherapy · 2017Article
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
7 authors at 2 institutions in 1 country.
Funding
Abstract
Efavirenz pharmacokinetics is characterized by large between-subject variability, which determines both therapeutic response and adverse effects. Some of the variability in efavirenz pharmacokinetics has been attributed to genetic variability in cytochrome P450 genes that alter efavirenz metabolism, such as CYP2B6 and CYP2A6 While the effects of additional patient factors have been studied, such as sex, weight, and body mass index, the extent to which they contribute to variability in efavirenz exposure is inconsistently reported. The aim of this analysis was to develop a pharmacometric model to quantify the contribution of genetic and nongenetic factors to efavirenz pharmacokinetics. A population-based pharmacokinetic model was developed using 1,132 plasma efavirenz concentrations obtained from 73 HIV-seronegative volunteers administered a single oral dose of 600 mg efavirenz. A two-compartment structural model with absorption occurring by zero- and first-order processes described the data. Allometric scaling adequately described the relationship between fat-free mass and apparent oral clearance, as well as fat mass and apparent peripheral volume of distribution. Inclusion of fat-free mass and fat mass in the model mechanistically accounted for correlation between these disposition parameters and sex, weight, and body mass index. Apparent oral clearance of efavirenz was reduced by 25% and 51% in subjects predicted to have intermediate and slow CYP2B6 metabolizer status, respectively. The final pharmacokinetic model accounting for fat-free mass, fat mass, and CYP2B6 metabolizer status was consistent with known mechanisms of efavirenz disposition, efavirenz physiochemical properties, and pharmacokinetic theory. (This study has been registered at ClinicalTrials.gov under identifier NCT00668395.).
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Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.