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Completed Phase 3 Interventional Results available

Doravirine/Islatravir (DOR/ISL) in Heavily Treatment-Experienced (HTE) Participants for Human Immunodeficiency Virus Type 1 (HIV-1) Infection (MK-8591A-019)

ClinicalTrials.gov ID: NCT04233216

Public ClinicalTrials.gov record NCT04233216. Field values are reproduced from the official study page; the official ClinicalTrials.gov record remains the source of truth for eligibility, enrollment, and contact information.

ClinicalTrials.gov public records Last synced Sep 2, 2026, 3:41 PM EDT

Data is sourced from official ClinicalTrials.gov public API records. Always review the official ClinicalTrials.gov record for the latest information.

Official title

A Phase 3, Randomized, Clinical Study in HIV-1-Infected Heavily Treatment-Experienced Participants Evaluating the Antiretroviral Activity of Blinded Islatravir (ISL), Doravirine (DOR), and Doravirine/Islatravir (DOR/ISL), Each Compared to Placebo, and the Antiretroviral Activity, Safety, and Tolerability of Open-Label DOR/ISL

Brief summary

Reproduced verbatim from the official ClinicalTrials.gov record. Not medical advice.

This is a 2-part, phase 3 clinical study evaluating the antiretroviral activity and safety/tolerability of islatravir (ISL), doravirine (DOR), and a fixed dose combination (FDC) of DOR/ISL (also known as MK-8591A) in heavily treatment-experienced (HTE) participants with human immunodeficiency virus type 1 (HIV-1) infection. It is hypothesized that the percentage of participants receiving DOR/ISL to achieve ≥0.5 log10 decrease in HIV-1 ribonucleic acid (RNA) from study baseline (Day 1) to Day 8 is superior to placebo, each given in combination with failing antiretroviral therapy (ART).

Study identification

NCT ID
NCT04233216
Recruitment status
Completed
Study type
Interventional
Phase
Phase 3
Lead sponsor
Merck Sharp & Dohme LLC
Industry
Enrollment
35 participants

Conditions and interventions

Interventions

Drug

Eligibility (public fields only)

Age range
Not listed
Sex
All
Healthy volunteers
Healthy volunteers not accepted

This page does not interpret eligibility. Detailed inclusion and exclusion criteria are on the official ClinicalTrials.gov record.

Study timeline

Start date
Mar 17, 2020
Primary completion
Nov 20, 2022
Completion
Oct 31, 2023
Last update posted
Dec 26, 2024

2020 – 2023

United States locations

U.S. sites
19
U.S. states
14
U.S. cities
18
Facility City State ZIP Site status
University of Alabama at Birmingham 1917 Research Clinic ( Site 4031) Birmingham Alabama 35222
Men's Health Foundation ( Site 4018) Los Angeles California 90069
Palmtree Clinical Research, Inc. ( Site 4016) Palm Springs California 92262
Yale School of Medicine ( Site 4007) New Haven Connecticut 06510
Georgetown University Hospital ( Site 4015) Washington D.C. District of Columbia 20007
The Kinder Medical Group ( Site 4014) Miami Florida 33133
Orlando Immunology Center ( Site 4012) Orlando Florida 32803
Triple O Research Institute, P.A. ( Site 4020) West Palm Beach Florida 33407
Chatham County Health Department ( Site 4029) Savannah Georgia 31410
Howard Brown Health Center ( Site 4006) Chicago Illinois 60613
Northstar Healthcare ( Site 4004) Chicago Illinois 60657
University of Maryland ( Site 4023) Baltimore Maryland 21201
The University of Mississippi Medical Center ( Site 4036) Jackson Mississippi 39216
Saint Michael's Medical Center-Research - Infectious Disease ( Site 4035) Newark New Jersey 07102
Icahn School of Medicine at Mount Sinai ( Site 4000) New York New York 10029
University of North Carolina at Chapel Hill ( Site 4026) Chapel Hill North Carolina 27599
Saint Hope Foundation, Inc. ( Site 4034) Bellaire Texas 77401
North Texas Infectious Diseases Consultants, PA ( Site 4005) Dallas Texas 75246
Dr. Peter Shalit, MD ( Site 4002) Seattle Washington 98104

Site contact phone numbers, emails, and investigator names are intentionally not displayed here. Open the official ClinicalTrials.gov record for site contact information.

Non-U.S. locations

This page focuses on the U.S. directory. The official record also lists 79 non-U.S. sites.

About this trial record page

What this page shows
Public field values for ClinicalTrials.gov record NCT04233216, including study identification, conditions, interventions, eligibility (age, sex, healthy volunteer), timeline, and U.S. site list.
What this page does not do
No medical advice, eligibility judgments, treatment recommendations, study quality scoring, or AI-generated medical summaries. No site contact phone numbers, emails, or investigator names.
Where the data comes from
Sourced from the official ClinicalTrials.gov public API. The official record is the source of truth.
Last refresh
Last update posted Dec 26, 2024 · Synced Sep 2, 2026

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Open the official record

The complete protocol, eligibility criteria, and contact information for NCT04233216 live on ClinicalTrials.gov.

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