CI

At a glance

ClinicalIndex Comparison Record
Phase 3Completed· 672 enrolled
Drug / intervention
DOR/ISL +1 moredrug
Likely dose
DOR/ISL 100 mgfrom record
Structured eligibility isn't available for this trial yet — see the full criteria in the Eligibility tab below.

Standardized by ClinicalIndex from the ClinicalTrials.gov record · verify against the source.

Search/NCT04223778
NCT04223778Phase 3Completed

A Phase 3 Randomized, Active-Controlled, Open-Label Clinical Study to Evaluate a Switch to Doravirine/Islatravir (DOR/ISL) Once-Daily in Participants With HIV-1 Virologically Suppressed on Antiretroviral Therapy

Merck Sharp & Dohme LLC·interventional·Posted Jan 10, 2020·Updated Feb 18, 2026

In Brief

A Phase 3 clinical trial evaluating DOR/ISL and ART for HIV Infection. Completed, enrolled 672 participants across 78 sites in 15 countries.

Detailed Summary

This study will evaluate the safety and efficacy of a switch to MK-8591A (a fixed dose combination of doravirine and islatravir) in human immunodeficiency virus -1 (HIV-1)-infected participants virologically suppressed on a protocol-specified antiretroviral regimen. The primary hypothesis is that a switch to MK-8591A will be non-inferior to continued treatment with baseline antiretroviral therapy (ART) as assessed by the percentage of participants with HIV-1 ribonucleic acid (RNA) ≥50 copies/mL at Week 48.

Study Details

Study Typeinterventional
Allocation--
Masking--
Primary Purpose--
ConditionsHIV Infection
CountriesAustralia, Canada, Chile, Colombia, France, Italy, Japan, New Zealand, Poland, Russia, South Africa, Spain, Switzerland, United Kingdom, United States
Collaborators--

Timeline

Phase 3CompletedFinished
2020202120222023202420252026
First PostedJan 10, 2020
Enrollment StartFeb 18, 2020
Primary CompletionSep 8, 2021
Study CompletionAug 26, 2024
TodayJul 2, 2026
Enrollment to primary: 1.6 yearsPosted 6.5 years ago

Interventions

DOR/ISLdrug

A FDC of 100 mg DOR/ 0.75 mg ISL taken in tablet form, orally, once daily

ARTdrug

Baseline ART regimen will be administered as per approved label. ART medication will not be provided by the Sponsor; participants will provide their own ART medications. Allowed drug classes include nucleoside analog reverse transcriptase inhibitors (NRTIs), non-nucleoside reverse transcriptase inhibitors (NNRTIs), protease inhibitors (PIs), integrase strand transferase inhibitors (InSTIs), fusion inhibitors, chemokine receptor 5 (CCR5) antagonists, post-attachment inhibitor, and pharmacokinetic (PK) boosters.