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A Phase 2/3, Randomized, Active-Controlled, Open-Label (Phase 2) and Double-Blind (Phase 3) Study to Evaluate the Antiretroviral Activity, Safety, and Tolerability of Islatravir (ISL) and Ulonivirine (ULO) Once Weekly Compared With Bictegravir/Emtricitabine/Tenofovir Alafenamide (BIC/FTC/TAF) Once Daily in Treatment-Naïve Adult Participants Living With HIV 1

Status
Not yet recruiting
Phases
Phase 2Phase 3
Study type
Interventional
Source
EU CTIS
Registry ID
CTIS2025-522519-40-00
Enrollment
35
Registered
2026-02-16
Start date
Unknown
Completion date
Unknown
Last updated
2026-02-16

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

Conditions

HIV

Brief summary

Phase 2: Percentage of Participants With Human Immunodeficiency Virus Type 1 (HIV-1) Ribonucleic Acid (RNA) <50 Copies/mL at Week 24, Phase 2: Percentage of Participants Who Experience an Adverse Event (AE) at Week 24, Phase 2: Percentage of Participants Who Discontinue Study Intervention Due to an AE at Week 24, Phase 3: Percentage of Participants With HIV-1 RNA <50 Copies/mL at Week 48, Phase 3: Percentage of Participants Who Experience an AE at Week 48, Phase 3: Percentage of Participants Who Discontinue Study Intervention Due to an AE at Week 48

Detailed description

Phase 2: Percentage of Participants With HIV-1 RNA <50 Copies/mL at Week 48, Phase 2: Percentage of Participants With HIV-1 RNA <50 Copies/mL at Week 96, Phase 2: Percentage of Participants With HIV-1 RNA <200 Copies/mL at Week 24, Phase 2: Percentage of Participants With HIV-1 RNA <200 Copies/mL at Week 48, Phase 2: Percentage of Participants With HIV-1 RNA <200 Copies/mL at Week 96, Phase 2: Mean Change From Baseline in Cluster of Differentiation 4-Positive (CD4+) T-Cell Count at Week 24, Phase 2: Mean Change From Baseline in CD4+ T-Cell Count at Week 48, Phase 2: Mean Change From Baseline in CD4+ T-Cell Count at Week 96, Phase 2: Percentage of Participants Who Experience an AE, Phase 2: Percentage of Participants Who Discontinue Study Intervention Due to an AE, Phase 2: Number of Participants With Evidence of Viral Drug Resistance-Associated Substitutions at Week 24, Phase 2: Number of Participants With Evidence of Viral Drug Resistance-Associated Substitutions at Week 48, Phase 2: Number of Participants With Evidence of Viral Drug Resistance-Associated Substitutions at Week 96, Phase 3: Percentage of Participants With HIV-1 RNA <50 Copies/mL at Week 96, Phase 3: Percentage of Participants With HIV-1 RNA <200 Copies/mL at Week 48, Phase 3: Percentage of Participants With HIV-1 RNA <200 Copies/mL at Week 96, Phase 3: Mean Change From Baseline in CD4+ T-Cell Count at Week 48, Phase 3: Mean Change From Baseline in CD4+ T-Cell Count at Week 96, Phase 3: Percentage of Participants Who Experience an AE, Phase 3: Percentage of Participants Who Discontinue Study Intervention Due to an AE, Phase 3: Number of Participants With Evidence of Viral Drug Resistance-Associated Substitutions at Week 48, Phase 3: Number of Participants With Evidence of Viral Drug Resistance-Associated Substitutions at Week 96, Phase 3: Mean Change From Baseline in Body Weight at Week 48, Phase 3: Mean Change From Baseline in Body Weight at Week 96

Interventions

DRUGEMTRICITABINE
DRUGPlacebo to BIK/FTC/TAF
DRUGMK-8591B
DRUGPlacebo to 8591B

Sponsors

Merck Sharp & Dohme LLC
Lead SponsorINDUSTRY

Eligibility

Sex/Gender
All
Age
18 Years to No maximum

Design outcomes

Primary

MeasureTime frame
Phase 2: Percentage of Participants With Human Immunodeficiency Virus Type 1 (HIV-1) Ribonucleic Acid (RNA) <50 Copies/mL at Week 24, Phase 2: Percentage of Participants Who Experience an Adverse Event (AE) at Week 24, Phase 2: Percentage of Participants Who Discontinue Study Intervention Due to an AE at Week 24, Phase 3: Percentage of Participants With HIV-1 RNA <50 Copies/mL at Week 48, Phase 3: Percentage of Participants Who Experience an AE at Week 48, Phase 3: Percentage of Participants Who Discontinue Study Intervention Due to an AE at Week 48

Secondary

MeasureTime frame
Phase 2: Percentage of Participants With HIV-1 RNA <50 Copies/mL at Week 48, Phase 2: Percentage of Participants With HIV-1 RNA <50 Copies/mL at Week 96, Phase 2: Percentage of Participants With HIV-1 RNA <200 Copies/mL at Week 24, Phase 2: Percentage of Participants With HIV-1 RNA <200 Copies/mL at Week 48, Phase 2: Percentage of Participants With HIV-1 RNA <200 Copies/mL at Week 96, Phase 2: Mean Change From Baseline in Cluster of Differentiation 4-Positive (CD4+) T-Cell Count at Week 24, Phase 2: Mean Change From Baseline in CD4+ T-Cell Count at Week 48, Phase 2: Mean Change From Baseline in CD4+ T-Cell Count at Week 96, Phase 2: Percentage of Participants Who Experience an AE, Phase 2: Percentage of Participants Who Discontinue Study Intervention Due to an AE, Phase 2: Number of Participants With Evidence of Viral Drug Resistance-Associated Substitutions at Week 24, Phase 2: Number of Participants With Evidence of Viral Drug Resistance-Associated Substitutions at Week 48, Phase 2:

Outcome results

None listed

Source: EU CTIS · Data processed: Feb 17, 2026