Trial reportOpen forum infectious diseases2025
Week 96 Results of Bictegravir/Emtricitabine/Tenofovir Alafenamide for HIV Treatment in People With Substance Use Disorders.
Trial report in Open forum infectious diseases, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. It is linked to trial NCT03998176 (A Phase 4, Single-Arm Study of the Efficacy and Safety of Bictegravir/Emtricitabine/Tenofovir Alafenamide in HIV-1 Infected Patients With Active Illicit Substance Use), which is not on this map. Not yet cited in PubMed.
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The trial behind it
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A Phase 4, Single-Arm Study of the Efficacy and Safety of Bictegravir/Emtricitabine/Tenofovir Alafenamide in HIV-1 Infected Patients With Active Illicit Substance Use
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Authors and funding
5 authors.
Funding
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Abstract
Background: The BASE study (NCT03998176), a phase 4, 48-week (W), single-arm, prospective trial, revealed that the use of bictegravir/emtricitabine/tenofovir alafenamide (B/F/TAF) in people with HIV and substance use disorders (PWH/SUD) was safe and effective without emergent antiretroviral resistance despite incomplete adherence. Here, we present the W96 results. Methods: A retrospective analysis of all participants enrolled in the BASE study was completed from W48 to W96. End points of interest at W96 included the proportion of participants with viral suppression (VS; HIV RNA <50 copies/mL [c/mL]), incidence of protocol-defined virologic failure (PDVF; 2 consecutive ≥400 c/mL), safety, adherence (percentage of days covered [PDC]), retention in care, and prevalence of ongoing substance use. Results: All enrolled BASE participants (n = 43) were included in the W96 analysis. At W48, 21 participants (49%) had achieved VS (intent-to-treat [ITT]). Thirty-six (84%) participants completed W96, with 19 achieving an HIV RNA <50 copies/mL (ITT, 44%; per-protocol, 54%). Seven participants (19%) met PDVF; genotyping was performed on 2, with no evidence of treatment-emergent antiretroviral resistance noted. No safety signals were identified or attributed to B/F/TAF. Adherence to B/F/TAF decreased 18% after W48 (mean PDC: W0-W48, 72%; W48-W96, 54%; Conclusions: At W96, the proportion of PWH/SUD achieving VS with B/F/TAF decreased to 44%, along with an adherence decrease of 18%, with no evidence of treatment-emergent HIV drug resistance occurring.
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