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Completed

NCT Number: NCT06104306

Study of B/F/TAF in Participants Switching From CAB + RPV to B/F/TAF for HIV-1 Infection (EMPOWER)

The goal of this clinical study is to learn how safe it is to switch to an oral therapy of Bictegravir/Emtricitabine/Tenofovir (B/F/TAF) from Cabotegravir + Rilpivirine (CAB+RPV) in participants living with virologically suppressed human immunodeficiency virus type 1 (HIV-1), meaning participants with HIV RNA levels below detectable levels.

The primary objective of this study is to assess the safety of switching to B/F/TAF in virologically suppressed participants unable/unwilling to continue on CAB+RPV intramuscular (IM) injections or wishing to switch to oral therapy through Week 12.

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Key information

Conditions

Age range

18 year and older

Sex eligibility

All sexes

Study type

Interventional

Phase

Phase 4

Primary location

Hamilton Health Sciences-SIS Clinic, Hamilton, Canada

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Who can participate

Healthy volunteers accepted: No

Only the study team can determine whether someone qualifies for participation.

Key Inclusion Criteria:

  • People with human immunodeficiency virus type 1 (HIV-1) (PWH) or provider decision to switch off cabotegravir + rilpivirine (CAB+RPV) intramuscular (IM) injections due to intolerance, inconvenience, adverse events (AEs), or willing to switch to (and intention to remain on) daily bictegravir/emtricitabine/tenofovir alafenamide (B/F/TAF).
  • Currently virologically suppressed (HIV-1 ribonucleic acid (RNA) < 50 copies/mL) on CAB+RPV IM injections every 2 months.
  • Currently on CAB+RPV IM injections every 2 months and received at least one dose of CAB+RPV IM injection; no missed CAB+RPV injections.
  • Ability to receive B/F/TAF up to 7 days prior to the next scheduled dose of CAB+RPV.
  • Documented plasma HIV-1 RNA < 50 copies/mL during treatment for ≥ 6 months preceding the screening visit.
  • No documented or suspected resistance to bictegravir, emtricitabine, or tenofovir.

Key Exclusion Criteria:

  • History of B/F/TAF intolerance.
  • History of previous integrase strand-transfer inhibitor (INSTI) virologic failure including CAB+RPV.
  • Requirement for ongoing therapy with any prohibited medications listed in local prescribing information for B/F/TAF starting within 30 days prior to screening until 30 days following the last dose of study drug.
  • Have been treated within 3 months of study screening or expected to receive during the study immunosuppressant therapies or chemotherapeutic agents (eg, chronic (at least 4 weeks) systemic steroids, immunoglobulins, and other immune- or cytokine-based therapies)
  • Need for oral antiretroviral therapy (ART) bridge or use of other antiretroviral (ARV) agents prior to starting B/F/TAF on Day 1

Note: Other protocol defined Inclusion/Exclusion criteria may apply.

Treatment and study plan

B/F/TAF

Drug

Tablets administered orally without regard to food

Other names: Biktarvy ®

Primary outcomes

  1. Percentage of Participants Experiencing Treatment Emergent Grade 3 or 4 Drug-related Adverse Events Through Week 12 (Co-Primary Endpoint)

    Time frame: Week 12

    Treatment emergent adverse events (TEAEs) were defined as any AE that began on or after the date of first dose of study drug up to the date of last dose of study drug plus 30 days or any AE leading to study drug discontinuation. The severity of AEs were be graded using the Division of AIDS (DAIDS) Toxicity Grading Scale.

    The DAIDS grading table provide an adverse events (AE) severity grading scale ranging from grades 1 to 5 with descriptions for each AE based on the following general guidelines:

    • Grade 1 indicates a mild event
    • Grade 2 indicates a moderate event
    • Grade 3 indicates a severe event
    • Grade 4 indicates a potentially life-threatening event
    • Grade 5 indicates death
  2. Percentage of Participants Experiencing Treatment-emergent Grade 3 or 4 Laboratory Abnormalities Through Week 12 (Co-Primary Endpoint)

    Time frame: Week 12

    Treatment-emergent laboratory abnormalities were defined as values that increased at least 1 toxicity grade from baseline at any time after baseline up to and including the date of last dose of study drug plus 30 days.

    The DAIDS Toxicity Grading Scale, Version 2.1 was used to assign toxicity grades (0 to 4) to laboratory results for analysis. Grade 0 included all values that did not meet the criteria for an abnormality of at least Grade 1. Grade 1 mild, Grade 2 moderate, Grade 3 severe, and Grade 4 potentially life-threatening.

Secondary outcomes

  1. Plasma Concentrations of Cabotegravir (CAB), and Rilpivirine (RPV) at Day 1 (Predose)

    Time frame: Day 1 (Predose)

  2. Plasma Concentration of Bictegravir (BIC), CAB, and RPV at Week 4

    Time frame: Week 4 (at trough and 2 hours postdose)

  3. Plasma Concentration of BIC, CAB, and RPV at Week 12

    Time frame: Week 12 (at trough and 2 hours postdose)

  4. Plasma Concentration of BIC, CAB, and RPV at Week 24

    Time frame: Week 24 (at trough and 2 hours postdose)

  5. Percentage of Participants With HIV-1 RNA ≥ 50 Copies/mL at Week 12 as Determined by Missing = Excluded Approach

    Time frame: Week 12

    This outcome measure analyzed using the Missing = Excluded (M = E) method. In this approach, all missing data were excluded in the analysis.

  6. Percentage of Participants With HIV-1 RNA ≥ 50 Copies/mL at Week 24 as Determined by Missing = Excluded Approach

    Time frame: Week 24

    This outcome measure analyzed using the Missing = Excluded (M = E) method. In this approach, all missing data were excluded in the analysis.

  7. Percentage of Participants With HIV-1 RNA ≥ 50 Copies/mL at Week 12 as Determined by Discontinuation = Failure Approach

    Time frame: Week 12

    This outcome measure was analyzed using the Discontinuation = Failure (D = F) method. In this approach, all discontinuation were treated as HIV-1 RNA >= 50 copies/mL (failure) in the analysis.

  8. Percentage of Participants With HIV-1 RNA ≥ 50 Copies/mL at Week 24 as Determined by Discontinuation = Failure Approach

    Time frame: Week 24

    This outcome measure was analyzed using the Discontinuation = Failure (D = F) method. In this approach, all discontinuation were treated as HIV-1 RNA >= 50 copies/mL (failure) in the analysis.

  9. Percentage of Participants With Discontinuation of B/F/TAF by Week 12

    Time frame: Up to 12 Weeks

  10. Percentage of Participants With Discontinuation of B/F/TAF by Week 24

    Time frame: Up to 24 Weeks

  11. Percentage of Participants Experiencing Treatment-emergent Grade 3 or 4 Laboratory Abnormalities Through Week 24

    Time frame: Week 24

    Treatment-emergent laboratory abnormalities were defined as values that increased at least 1 toxicity grade from baseline at any time after baseline up to and including the date of last dose of study drug plus 30 days.

    The DAIDS Toxicity Grading Scale, Version 2.1 was used to assign toxicity grades (0 to 4) to laboratory results for analysis. Grade 0 included all values that did not meet the criteria for an abnormality of at least Grade 1. Grade 1 mild, Grade 2 moderate, Grade 3 severe, and Grade 4 potentially life-threatening.

  12. HIV Treatment Satisfaction (HIVTSQc) Score at Week 4

    Time frame: Week 4

    The HIVTSQc was a 1-12 items questionnaire. Each item was scored -3 to 3. The total score ranged from -33 to +33, based on 11 items. Higher the score, greater the improvement in satisfaction with treatment; the lower the score, the greater the deterioration in satisfaction with treatment. A score of 0 represented no change.

Sponsors and collaborators

Lead sponsor

Gilead Sciences

Industry

Registry information

Official study title

A Phase 4 Study to Evaluate the Safety, Pharmacokinetics and Efficacy of Oral B/F/TAF After Discontinuing Injectable CAB + RPV

Important dates

Study start
2023
Primary completion
2025
Study completion
2025
First posted
Oct 27, 2023
Registry last updated
Feb 11, 2026

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

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