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A randomised, double-blind, placebo-controlled, clinical trial to compare the safety and efficacy of reduced dose efavirenz (EFV) with standard dose EFV plus two nucleotide reverse transcriptase inhibitors (N(t)RTI) in antiretroviral-naïve HIV-infected individuals over 96 weeks. - Encore1

A randomised, double-blind, placebo-controlled, clinical trial to compare the safety and efficacy of reduced dose efavirenz (EFV) with standard dose EFV plus two nucleotide reverse transcriptase inhibitors (N(t)RTI) in antiretroviral-naïve HIV-infected individuals over 96 weeks. - Encore1

Status
Active, not recruiting
Phases
Phase 3Phase 4
Study type
Interventional
Source
EU CTR
Registry ID
EUCTR2009-013795-44-GB
Enrollment
630
Registered
2010-04-16
Start date
2011-04-19
Completion date
Unknown
Last updated
2019-06-30

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

HIV infection MedDRA version: 14.0 Level: PT Classification code 10020161 Term: HIV infection System Organ Class: 10021881 - Infections and infestations

Interventions

Trade Name: Efamat200 Product Name: Efavirenz Pharmaceutical Form: Tablet INN or Proposed INN: EFAVIRENZ CAS Number: 154598-52-4

Sponsors

National Centre in HIV Epidemiology and Clinical Research
Lead Sponsor

Eligibility

Sex/Gender
All

Inclusion criteria

Inclusion criteria: • HIV-1 positive by licensed diagnostic test • aged >16 years of age (or minimum age as determined by local regulations or as legal requirements dictate) • 50 =65 years) yes F.1.3.1 Number of subjects for this age range

Exclusion criteria

Exclusion criteria: • the following laboratory values: - absolute neutrophil count (ANC) 5 x ULN • pregnant women or nursing mothers • active opportunistic or malignant disease not under adequate control • use of immunomodulators within 30 days prior to screening • use of any prohibited medications • current alcohol or illicit substance use that might adversely affect study participation.

Design outcomes

Primary

MeasureTime frame
Main Objective: To compare the safety and efficacy of standard (600mg qd) versus reduced dose (400mg qd) EFV as part of initial combination antiretroviral therapy (ART).; Secondary Objective: To conduct a range of analyses to examine: • Virological response to therapy • Changes in CD4+ T cell numbers • Incidence and type of SAEs • Incidence and type of AEs • Changes from baseline in fasted lipid, glucose and selected serum biochemical parameters • Adherence to therapy • Quality of life • Neurocognitive function • Exploratory use of dry blood spot method to measure viral load and EFV concentrations ;Primary end point(s): The primary endpoint is the comparison between treatment groups of proportions of patients with HIV-1 RNA <200 copies/mL 48weeks after randomisation.

Countries

Germany, United Kingdom

Outcome results

None listed

Source: EU CTR (via WHO ICTRP) · Data processed: Feb 4, 2026