AzTrials
AzTrials

HIV-1 InfectionPhase 3NCT04233879

Study of Doravirine/Islatravir (DOR/ISL 100 mg/0.75 mg) to Evaluate the Antiretroviral Activity, Safety, and Tolerability in Treatment-Naïve Participants With Human Immunodeficiency Virus Type 1 (HIV-1) Infection (MK-8591A-020)

A Phase 3 study testing DOR/ISL and BIC/FTC/TAF in people with HIV-1 Infection, run by Merck Sharp & Dohme LLC at 95 sites in 13 countries.

Completed

Finished. The study has ended and is not enrolling. Results may be posted on the official record.

Official record
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Trial summary

This is a phase 3, randomized, controlled, double-blind, multisite clinical study of a once-daily fixed dose combination (FDC) of 100 mg doravirine/0.75 mg islatravir (DOR/ISL [also known as MK-8591A]) in treatment-naïve participants living with human immunodeficiency virus type-1 (HIV-1) infection. Read more about this study

Who is it for?
Ages 18 years and older
Conditions the study is for
HIV-1 Infection
What is being tested?
DOR/ISL and BIC/FTC/TAF
Type of treatment
Pill or oral medicine
Could I receive a placebo?
Yes, some participants may receive a placebo
How many people
599 participants
Where
95 sitesin 13 countries
Study dates
28 Feb 2020to 29 Jan 2025
Phase
Phase 3
Are there results?
Yes, posted in the registrySummary in the doctors' view

Key requirements

Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.

  • Ages 18 years and older
  • All sexes
  • No healthy volunteers
  • Adult, Older adult

Who may be able to join

  • Is human immunodeficiency virus type 1 (HIV-1) positive
  • Is naïve to antiretroviral therapy (ART) defined as having received ≤10 days of prior therapy with any antiretroviral agent following a diagnosis of HIV-1 infection including prevention of mother-to-child transmission up to 1 month prior to screening.
  • A female participant is eligible to participate if she is not pregnant or breastfeeding, and at least one of the following conditions applies: 1) Is not a woman of childbearing potential (WOCBP); 2) Is a WOCBP and using an acceptable contraceptive method, or be abstinent from heterosexual intercourse as their preferred and usual lifestyle (abstinent on a long term and persistent basis); 3) A WOCBP must have a negative highly sensitive pregnancy test ([urine or serum] as required by local regulations) within 24 hours before the first dose of study intervention; 4) If a urine test cannot be confirmed as negative (eg, an ambiguous result), a serum pregnancy test is required

Who cannot join

  • Has human immunodeficiency virus type 2 (HIV-2) infection
  • Has hypersensitivity or other contraindication to any of the components of the study interventions as determined by the investigator
  • Has an active diagnosis of hepatitis due to any cause, including active hepatitis B virus (HBV) infection (defined as hepatitis B surface antigen [HBsAg]-positive or hepatitis B virus deoxyribonucleic acid [HBV DNA]-positive)
  • Has a history of malignancy ≤5 years prior to signing informed consent except for adequately treated basal cell or squamous cell skin cancer, in situ cervical cancer, or cutaneous Kaposi's sarcoma
  • Has a history or current evidence of any condition (including active tuberculosis infection), therapy, laboratory abnormality or other circumstance (including drug or alcohol use or dependence) that might, in the opinion of the investigator, confound the results of the study or interfere with the participant's participation for the full duration of the study
  • Has been treated for a viral infection other than HIV-1, such as hepatitis B, with an agent that is active against HIV-1
Show all 11Show fewer
  • Is taking or is anticipated to require systemic immunosuppressive therapy, immune modulators, or any prohibited therapy from 45 days prior to Day 1 through the study intervention period
  • Is currently participating in or has participated in a clinical study with an investigational compound or device from 45 days prior to Day 1 through the study intervention period
  • Has a documented or known virologic resistance to any approved HIV-1 reverse transcriptase inhibitor, or any study intervention
  • Has exclusionary laboratory values within 45 days prior to Day 1
  • Is female and is expecting to conceive or donate eggs at any time during the study

Trial locations and contacts

95 sites in 13 countries.

95 sites in 13 countries

United States17 sites
  • Saint Hope Foundation, Inc. ( Site 5629)

    Bellaire, Texas, 77401

  • University of Alabama at Birmingham 1917 Research Clinic ( Site 5610)

    Birmingham, Alabama, 35222

  • Columbus Regional Research Institute ( Site 5616)

    Columbus, Georgia, 31904

  • North Texas ID Consultants, PA ( Site 5604)

    Dallas, Texas, 75246

  • Infectious Disease Specialists Of Atlanta PC ( Site 5608)

    Decatur, Georgia, 30033

  • Texas Centers for Infectious Disease Associates P.A. ( Site 5619)

    Fort Worth, Texas, 76104

  • Midway Immunology and Research ( Site 5622)

    Ft. Pierce, Florida, 34982

  • Kansas City CARE Clinic ( Site 5607)

    Kansas City, Missouri, 64111

  • Ruane Clinical Research Group, Inc. ( Site 5624)

    Los Angeles, California, 90036

  • The Kinder Medical Group ( Site 5615)

    Miami, Florida, 33133

  • Floridian Clinical Research, LLC ( Site 5625)

    Miami Lakes, Florida, 33016

  • Hennepin Healthcare-Hennepin Healthcare-ID ( Site 5633)

    Minneapolis, Minnesota, 55415

  • Orlando Immunology Center ( Site 5613)

    Orlando, Florida, 32803

  • University of Pennsylvania ( Site 5630)

    Philadelphia, Pennsylvania, 19104

  • Pueblo Family Physicians ( Site 5606)

    Phoenix, Arizona, 85015

  • CAN Community Health ( Site 5627)

    Sarasota, Florida, 34237

  • Triple O Research Institute, P.A. ( Site 5621)

    West Palm Beach, Florida, 33407

Other trials in United States

Italy12 sites
  • ASST Papa Giovanni XXIII ( Site 6411)

    Bergamo, Lombardy, 24127

  • Fondazione IRCCS Ca' Granda-Ospedale Maggiore Policlinico ( Site 6401)

    Milan, 20122

  • Salute San Raffaele ( Site 6402)

    Milan, 20127

  • Azienda Ospedaliera San Paolo ( Site 6403)

    Milan, 20142

  • ASST Fatebenefratelli-Ospedale Sacco ( Site 6400)

    Milan, 20157

  • Azienda Ospedaliero Universitaria di Modena Policlinico ( Site 6404)

    Modena, Emilia-Romagna, 41124

  • Ospedale San Gerardo ASST Monza ( Site 6412)

    Monza, Monza E Brianza, 20900

  • A.O.R.N. dei Colli - Ospedale Cotugno ( Site 6407)

    Naples, Campania, 80131

  • IRCCS Policlinico San Matteo ( Site 6410)

    Pavia, 27100

  • Azienda USL di Pescara-Presidio Ospedaliero di Pescara ( Site 6413)

    Pescara, 65129

  • Istituto Nazionale per Le Malattie Infettive Lazzaro Spallanzani ( Site 6405)

    Roma, 00149

  • Ospedale Amedeo di Savoia ( Site 6414)

    Turin, Piedmont, 10149

Other trials in Italy

France10 sites
  • Hopital Avicenne ( Site 6102)

    Bobigny, Seine-Saint-Denis, 93000

  • CHU de Bordeaux. Hopital Pellegrin ( Site 6116)

    Bordeaux, Gironde, 33076

  • Hopital Francois Mitterrand ( Site 6119)

    Dijon, Cote-d Or, 21079

  • Hopital de la Croix-Rousse ( Site 6127)

    Lyon, Auvergne-Rhône-Alpes, 69004

  • Centre Hospitalier Regional du Orleans ( Site 6108)

    Orléans, Centre-Val de Loire, 45000

  • A.P.H. Paris. Hopital Bichat Claude Bernard ( Site 6124)

    Paris, Ain, 75018

  • A.P.H. Paris, Hopital Saint Louis ( Site 6114)

    Paris, 75010

  • Hopital Saint-Antoine ( Site 6113)

    Paris, 75012

  • Hopital Pitie Salpetriere ( Site 6111)

    Paris, 75013

  • Centre Hospitalier de Tourcoing ( Site 6100)

    Tourcoing, Nord, 59208

Other trials in France

Spain10 sites
  • Hospital Universitari Germans Trias i Pujol ( Site 6301)

    Badalona, Barcelona, 08916

  • Hospital Vall D Hebron ( Site 6302)

    Barcelona, Catalonia, 08035

  • Hospital Clinic i Provincial ( Site 6300)

    Barcelona, Catalonia, 08036

  • Hospital General de Elche ( Site 6308)

    Elche, Alicante, 03202

  • Hospital Universitari de Bellvitge ( Site 6312)

    LHospitalet de Llobregat, Barcelona, 08907

  • Hospital General Universitario Gregorio Maranon ( Site 6303)

    Madrid, 28007

  • Hospital Universitario Fundacion Jimenez Diaz ( Site 6307)

    Madrid, 28040

  • Hospital Universitario 12 de Octubre ( Site 6305)

    Madrid, 28041

  • Hospital Universitario La Paz ( Site 6304)

    Madrid, 28046

  • Hospital Universitario Virgen de la Victoria ( Site 6309)

    Málaga, 29010

Other trials in Spain

South Africa8 sites
  • JOSHA Research ( Site 6605)

    Bloemfontein, Free State, 9301

  • Family Clinical Research Unit (Fam-Cru)-Adult Infectious Diseases ( Site 6617)

    Cape Town, Western Cape, 7500

  • Desmond Tutu HIV Foundation Clinical Trial Unit ( Site 6613)

    Cape Town, Western Cape, 7925

  • Wentworth Hospital ( Site 6607)

    Durban, KwaZulu-Natal, 4052

  • Chris Hani Baragwanath Hospital - ICU ( Site 6608)

    Johannesburg, Gauteng, 1862

  • Wits Health Consortium. Clinical HIV Research Unit ( Site 6614)

    Johannesburg, Gauteng, 2041

  • Ezintsha ( Site 6609)

    Johannesburg, Gauteng, 2193

  • Be Part Yoluntu Centre ( Site 6603)

    Mbekweni, Paarl, Western Cape, 7646

Other trials in South Africa

Germany7 sites
  • EPIMED- Ges. f. epidemiolog. u. klin. Forschung in der Medizin mbH ( Site 6208)

    Berlin, 10787

  • Universitaetsklinikum Bonn ( Site 6200)

    Bonn, North Rhine-Westphalia, 53127

  • Infektiologikum ( Site 6201)

    Frankfurt am Main, Hesse, 60596

  • Universitaetsklinik Freiburg ( Site 6206)

    Freiburg im Breisgau, Baden-Wurttemberg, 79106

  • Universitaetsklinikum Hamburg- Eppendorf (UKE) ( Site 6210)

    Hamburg, 20246

  • Klinikum der LMU München ( Site 6204)

    Munich, Bavaria, 80336

  • MVZ Munchen am Goetheplatz ( Site 6202)

    Munich, Bavaria, 80337

Other trials in Germany

Chile6 sites
  • Clinica Arauco Salud ( Site 5900)

    Santiago, Region M. de Santiago, 7560994

  • Hospital Clinico de la Universidad Catolica ( Site 5903)

    Santiago, Region M. de Santiago, 8331150

  • Fundacion Arriaran ( Site 5901)

    Santiago, Region M. de Santiago, 8360159

  • Centro Cardiovascular Cardiosur ( Site 5907)

    Santiago, Region M. de Santiago, 8910259

  • Clinica Universidad Catolica del Maule ( Site 5909)

    Talca, Maule Region, 3460000

  • Hospital Dr. Hernan Henriquez Aravena ( Site 5905)

    Temuco, Araucania, 4781151

Other trials in Chile

Argentina5 sites
  • Helios Salud S.A. ( Site 5802)

    Buenos Aires, Buenos Aires F.D., C1141ACG

  • IDEAA Foundation ( Site 5807)

    Buenos Aires, Buenos Aires F.D., C1405CKC

  • Fundación Huesped ( Site 5801)

    C.a.b.a, Buenos Aires F.D., C1202ABB

  • Instituto Oulton ( Site 5804)

    Córdoba, X5000JJS

  • Instituto CAICI ( Site 5803)

    Rosario, Santa Fe Province, S2000PBJ

Other trials in Argentina

Israel5 sites
  • Rambam Medical Center ( Site 6701)

    Haifa, 3109601

  • Hadassah Ein Kerem Medical Center ( Site 6702)

    Jerusalem, 9112001

  • Chaim Sheba Medical Center. ( Site 6704)

    Ramat Gan, 5265601

  • Kaplan Medical Center ( Site 6700)

    Rehovot, 7610001

  • Sourasky Medical Center ( Site 6705)

    Tel Aviv, 64239

Other trials in Israel

Japan5 sites
  • Kumamoto University Hospital ( Site 6905)

    Kumamoto, 860-8556

  • National Hospital Organization Nagoya Medical Center ( Site 6903)

    Nagoya, Aichi-ken, 460-0001

  • National Hospital Organization - Osaka National Hospital - Institute For Clinical Research ( Site 69

    Osaka, 540-0006

  • Tokyo Medical University Hospital ( Site 6904)

    Tokyo, 160-0023

  • Center Hospital of the National Center for Global Health and Medicine ( Site 6901)

    Tokyo, 162-8655

Other trials in Japan

Canada4 sites
  • Hamilton Health Sciences- Urgent Care Centre-SIS Clinic ( Site 5703)

    Hamilton, Ontario, L8S 14K

  • Clinique Medicale L Actuel ( Site 5714)

    Montreal, Quebec, H2L 4P9

  • McGill University Health Center - Research Institute-CVIS Clinical Research Unit ( Site 5702)

    Montreal, Quebec, H4A 3J1

  • Toronto General Hospital - University Health Network ( Site 5705)

    Toronto, Ontario, M5G 2N2

Other trials in Canada

Colombia3 sites
  • Hospital Universitario San Ignacio ( Site 6005)

    Bogotá, Bogota D.C., 110231

  • Clinica Colsanitas S.A. Sede Clinica Universitaria Colombia ( Site 6006)

    Bogotá, Bogota D.C., 111321

  • Fundacion Valle del Lili ( Site 6001)

    Cali, Valle del Cauca Department, 760032

Other trials in Colombia

Taiwan3 sites
  • Kaohsiung Veterans General Hospital ( Site 7102)

    Kaohsiung City, 81362

  • National Cheng Kung University Hospital ( Site 7101)

    Tainan, 70403

  • National Taiwan University Hospital ( Site 7100)

    Taipei, 100

Other trials in Taiwan

About this study

Official title: A Phase 3 Randomized, Active-Controlled, Double-Blind Clinical Study to Evaluate the Antiretroviral Activity, Safety, and Tolerability of Doravirine/Islatravir Once-Daily in HIV-1 Infected Treatment-Naïve Participants

This is a phase 3, randomized, controlled, double-blind, multisite clinical study of a once-daily fixed dose combination (FDC) of 100 mg doravirine/0.75 mg islatravir (DOR/ISL [also known as MK-8591A]) in treatment-naïve participants living with human immunodeficiency virus type-1 (HIV-1) infection. The primary objectives are to evaluate the antiretroviral activity, safety, and tolerability of DOR/ISL compared to bictegravir/emtricitabine/tenofovir alafenamide (BIC/FTC/TAF). The primary hypothesis is that DOR/ISL is noninferior or superior to BIC/FTC/TAF treatment based on the percentage of participants with HIV-1 ribonucleic acid (RNA) <50 copies/mL at Week 48.

Read the detailed description

Double-blind treatment with the assigned intervention occurs from Day 1 to Week 96, followed by an open-label portion up to Week 144. Participants who benefit from treatment in the opinion of the Investigator may continue their assigned intervention up to Week 168 (or until they have the option to enroll in a DOR/ISL 100 mg/0.25 mg study, whichever is sooner).

Conditions
HIV-1 Infection
Being tested
DOR/ISL, BIC/FTC/TAF, Placebo to BIC/FTC/TAF, Placebo to DOR/ISL

What participants receive

What participants receive. In a randomised study each person is assigned to one group by chance.

  • DOR/ISLDrug

    Also called MK-8591A, Doravirine/islatravir

    100 mg DOR/0.75 mg ISL FDC single tablet taken once daily by mouth.

  • BIC/FTC/TAFDrug

    Also called Bictegravir/emtricitabine/tenofovir alafenamide

    BIC/FTC/TAF 50/200/25 mg FDC single tablet taken once daily by mouth.

  • Placebo to BIC/FTC/TAFDrug

    Placebo single tablet matched to BIC/FTC/TAF taken by mouth.

  • Placebo to DOR/ISLDrug

    Placebo single tablet matched to DOR/ISL taken by mouth.

Study groups in NCT04233879
Study groupRoleWhat they receive
Group 1: doravirine/islatravir (DOR/ISL)ExperimentalTreatment-naïve participants living with human immunodeficiency virus-1 (HIV-1) that had not received ≤10 days of prior antiretroviral therapy received blinded fixed dose combination (FDC) Doravirine/Islatravir (DOR/ISL) (100 mg doravirine [DOR]/0.75 mg islatravir [ISL]) and placebo to Bictegravir/Tenofovir Alafenamide/Emtricitabine (BIC/FTC/TAF) once daily (QD) from Day 1 to Week 96, and open-label DOR/ISL up to Week 144. At Week 144, participants who consent to enter the optional open-label study extension continued to receive open-label QD FDC of DOR/ISL (100 mg/0.75 mg) for an additional 24 weeks, up to Week 168.
Receives: Drug: DOR/ISL; Drug: Placebo to BIC/FTC/TAF
Group 2: bictegravir/emtricitabine/tenofovir alafenamide (BIC/FTC/TAF)Active comparatorTreatment-naïve participants living with HIV-1 that had not received ≤10 days of prior antiretroviral therapy received blinded BIC/FTC/TAF (50 mg bictegravir [BIC], 200 mg emtricitabine [FTC], 25 mg tenofovir alafenamide [TAF]) and placebo to FDC DOR/ISL QD from Day 1 to Week 96, and open-label BIC/FTC/TAF up to Week 144. At Week 144, participants who consent to enter the optional open-label study extension continued to receive QD BIC/FTC/TAF (50 mg/200 mg/25 mg) for an additional 24 weeks, up to Week 168.
Receives: Drug: BIC/FTC/TAF; Drug: Placebo to DOR/ISL

What is being measured

The primary outcome is the main question the study is designed to answer.

  1. Percentage of Participants With Human Immunodeficiency Virus (HIV)-1 Ribonucleic Acid (RNA) <50 Copies/mL at Week 48

    The Abbott RealTime polymerase chain reaction (PCR) assay with a reliable lower limit of quantification of 40 copies/mL was used to measure the HIV-1 RNA level in blood samples obtained at each visit. The percentage of participants with HIV-1 RNA <50 copies/mL at Week 48 was presented using the Food and Drug Administration (FDA) Snapshot missing data approach. The final analysis for this outcome is presented here.

    Measured: Week 48

  2. Percentage of Participants Who Experienced an Adverse Event (AE) up to Week 48

    An AE was any untoward medical occurrence in a study participant administered a study drug, which does not necessarily have a causal relationship with this treatment. An AE can therefore be any unfavorable and unintended sign (including an abnormal laboratory finding), symptom, or disease temporally associated with the use of the study drug whether or not it is considered related to the study drug. The percentage of participants who experienced at least one AE up to Week 48 was reported. The final analysis for this outcome is presented here.

    Measured: Up to approximately 48 weeks

  3. Percentage of Participants Who Discontinued Study Treatment Due to an AE up to Week 48

    An AE was any untoward medical occurrence in a study participant administered a study drug, which does not necessarily have a causal relationship with this treatment. An AE can therefore be any unfavorable and unintended sign (including an abnormal laboratory finding), symptom, or disease temporally associated with the use of the study drug whether or not it is considered related to the study drug. The percentage of participants who discontinued study treatment due to an AE up to Week 48 were reported. The final analysis for this outcome is presented here.

    Measured: Up to approximately 48 weeks

Secondary outcomes (19)
  1. Percentage of Participants With HIV-1 RNA <50 Copies/mL at Week 96

    The Abbott RealTime PCR assay with a reliable lower limit of quantification of 40 copies/mL was used to measure the HIV-1 RNA level in blood samples obtained at each visit. The percentage of participants with HIV-1 RNA <50 copies/mL at Week 96 was presented using the FDA Snapshot missing data approach. The final analysis for this outcome is presented here.

    Measured: Week 96

  2. Percentage of Participants With HIV-1 RNA <50 Copies/mL at Week 144

    The Abbott RealTime PCR assay with a reliable lower limit of quantification of 40 copies/mL was used to measure the HIV-1 RNA level in blood samples obtained at each visit. The percentage of participants with HIV-1 RNA <50 copies/mL at Week 144 was presented using the Data as Observed (DAO) missing data approach. The final analysis for this outcome is presented here.

    Measured: Week 144

  3. Percentage of Participants With HIV-1 RNA <40 Copies/mL at Week 48

    The percentage of participants with HIV-1 RNA <40 copies/mL was determined. The Abbott RealTime PCR assay with a reliable lower limit of quantification of 40 copies/mL was used to measure the HIV-1 RNA level in blood samples obtained at each visit. The percentage of participants with HIV-1 RNA <40 copies/mL at Week 48 was presented using the FDA Snapshot missing data approach. The final analysis for this outcome is presented here.

    Measured: Week 48

  4. Percentage of Participants With HIV-1 RNA <200 Copies/mL at Week 48

    The percentage of participants with HIV-1 RNA <200 copies/mL was determined. The Abbott RealTime PCR assay with a reliable lower limit of quantification of 40 copies/mL was used to measure the HIV-1 RNA level in blood samples obtained at each visit. The percentage of participants with HIV-1 RNA <200 copies/mL at Week 48 was presented using the FDA Snapshot missing data approach. The final analysis for this outcome is presented here.

    Measured: Week 48

  5. Percentage of Participants With HIV-1 RNA <40 Copies/mL at Week 96

    The Abbott RealTime PCR assay with a reliable lower limit of quantification of 40 copies/mL was used to measure the HIV-1 RNA level in blood samples obtained at each visit. The percentage of participants with HIV-1 RNA <40 copies/mL at Week 96 was presented using the FDA Snapshot missing data approach. The final analysis for this outcome is presented here.

    Measured: Week 96

  6. Percentage of Participants With HIV-1 RNA <200 Copies/mL at Week 96

    The Abbott RealTime PCR assay with a reliable lower limit of quantification of 40 copies/mL was used to measure the HIV-1 RNA level in blood samples obtained at each visit. The percentage of participants with HIV-1 RNA <200 copies/mL at Week 96 was presented using the FDA Snapshot missing data approach. The final analysis for this outcome is presented here.

    Measured: Week 96

  7. Percentage of Participants With HIV-1 RNA <40 Copies/mL at Week 144

    The Abbott RealTime PCR assay with a reliable lower limit of quantification of 40 copies/mL was used to measure the HIV-1 RNA level in blood samples obtained at each visit. The percentage of participants with HIV-1 RNA <40 copies/mL at Week 144 was presented using the DAO missing data approach. The final analysis for this outcome is presented here.

    Measured: Week 144

  8. Percentage of Participants With HIV-1 RNA <200 Copies/mL at Week 144

    The Abbott RealTime PCR assay with a reliable lower limit of quantification of 40 copies/mL was used to measure the HIV-1 RNA level in blood samples obtained at each visit. The percentage of participants with HIV-1 RNA <200 copies/mL at Week 144 was presented using the DAO missing data approach. The final analysis for this outcome is presented here.

    Measured: Week 144

  9. Mean Change From Baseline in Cluster of Differentiation 4+ (CD4+) T-Cell Counts at Week 48

    Plasma CD4+ T-cell count was measured in cells/mm^3 for baseline and at Week 48 by a central laboratory. Baseline measurements were defined as the Day 1 value of each participant. The mean change from baseline in CD4+ T-cell count at Week 48 using the Data as Observed (DAO) approach was presented. The final analysis for this outcome is presented here.

    Measured: Baseline (Day 1) and Week 48

  10. Mean Change From Baseline in Cluster of Differentiation 4+ (CD4+) T-Cell Counts at Week 96

    Plasma CD4+ T-cell count was measured in cells/mm^3 for baseline and at Week 96 by a central laboratory. Baseline measurements were defined as the Day 1 value of each participant. The mean change from baseline in CD4+ T-cell count at Week 96 using the Data as Observed (DAO) approach was presented. The final analysis for this outcome is presented here.

    Measured: Baseline (Day 1) and Week 96

  11. Mean Change From Baseline in Cluster of Differentiation 4+ (CD4+) T-Cell Counts at Week 144

    Plasma CD4+ T-cell count was measured in cells/mm^3 for baseline and at Week 144 by a central laboratory. Baseline measurements were defined as the Day 1 value of each participant. The mean change from baseline in CD4+ T-cell count at Week 144 using the Data as Observed (DAO) approach was presented. The final analysis for this outcome is presented here.

    Measured: Baseline (Day 1) and Week 144

  12. Incidence of Viral Resistance-Associated Substitutions (RASs) at Week 48

    RASs was defined as participants with confirmed HIV-1 RNA ≥200 copies/mL and/or genotypic or phenotypic analysis of data showing evidence of resistance to the study drug administered. The number of participants who demonstrated RASs at Week 48 was presented. The final analysis for this outcome is presented here.

    Measured: Week 48

  13. Incidence of Viral RASs at Week 96

    RASs was defined as participants with confirmed HIV-1 RNA ≥200 copies/mL and/or genotypic or phenotypic analysis of data showing evidence of resistance to the study drug administered. The number of participants who demonstrated RASs at Week 96 was presented. The final analysis for this outcome is presented here.

    Measured: Week 96

  14. Incidence of Viral RASs at Week 144

    RASs was defined as participants with confirmed HIV-1 RNA ≥200 copies/mL and/or genotypic or phenotypic analysis of data showing evidence of resistance to the study drug administered. The number of participants who demonstrated RASs at Week 144 was presented. The final analysis for this outcome is presented here.

    Measured: Week 144

  15. Mean Change From Baseline in Body Weight at Week 48

    Body weight was measured at baseline and at Week 48. Participants removed their shoes and wore a single layer of clothing at each measurement. Baseline measurements were defined as the Day 1 value of each participant. The mean change from baseline in body weight at Week 48 was presented. The final analysis for this outcome is presented here.

    Measured: Baseline (Day 1) and Week 48

  16. Mean Change From Baseline in Body Weight at Week 96

    Body weight was measured at baseline and at Week 96. Participants removed their shoes and wore a single layer of clothing at each measurement. Baseline measurements were defined as the Day 1 value of each participant. The mean change from baseline in body weight at Week 96 was presented. The final analysis for this outcome is presented here.

    Measured: Baseline (Day 1) and Week 96

  17. Mean Change From Baseline in Body Weight at Week 144

    Body weight was measured at baseline and at Week 144. Participants removed their shoes and wore a single layer of clothing at each measurement. Baseline measurements were defined as the Day 1 value of each participant. The mean change from baseline in body weight at Week 144 was presented. The final analysis for this outcome is presented here.

    Measured: Baseline (Day 1) and Week 144

  18. Percentage of Participants Who Experienced an Adverse Event (AE)

    An AE was any untoward medical occurrence in a study participant administered a study drug, which does not necessarily have a causal relationship with this treatment. An AE can therefore be any unfavorable and unintended sign (including an abnormal laboratory finding), symptom, or disease temporally associated with the use of the study drug whether or not it is considered related to the study drug. The percentage of participants who experienced at least one or more AEs is presented. Per protocol, pregnancy-related AEs collected for enrolled participants are reported separately and are presented in the AE module. The final analysis for this outcome is presented here.

    Measured: Up to approximately 47 months

  19. Percentage of Participants Who Discontinued Study Treatment Due to an AE

    An AE was any untoward medical occurrence in a study participant administered a study drug, which does not necessarily have a causal relationship with this treatment. An AE can therefore be any unfavorable and unintended sign (including an abnormal laboratory finding), symptom, or disease temporally associated with the use of the study drug whether or not it is considered related to the study drug. The percentage of participants who discontinued study intervention due to an AE is presented. Per protocol, pregnancy-related AEs collected for enrolled participants are reported separately and are presented in the AE module. The final analysis for this outcome is presented here.

    Measured: Up to approximately 38 months

Timeline

From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.

  1. First posted18 Jan 2020
  2. Study start28 Feb 2020
  3. Primary completion17 Nov 2022
  4. Study completion29 Jan 2025

Resources

More details

For doctors and researchers: how the study is designed, who runs it, and its registry IDs.

Study design
Study type
Interventional
Phase
Phase 3
Primary purpose
Treatment
Allocation
Randomised
Intervention model
Parallel groups
Masking
Double blind
Who is masked
Participant, Investigator
Enrolment
599 participants (actual)
IDs, dates and publications
ClinicalTrials.gov ID
NCT04233879
Sponsor's protocol ID
8591A-020
Other IDs
MK-8591A-020, jRCT2031210024, 2019-000590-23, 2019
Status last verified
Jun 2026
First submitted
15 Jan 2020
Last updated
3 Jun 2026
Data monitoring committee
Yes
FDA-regulated drug
Yes
FDA-regulated device
No
Individual data sharing
Yes: https://trialstransparency.msdclinicaltrials.com/pdf/ProcedureAccessClinicalTrialData.pdf

Publications

  • Rockstroh JK, Paredes R, Cahn P, Molina JM, Sokhela SM, Hinestrosa F, Kassim S, Cunningham D, Ghosn J, Bogner JR, Gatanaga H, Asante-Appiah E, Zhang Y, Nwoke U, Klopfer SO, Eves K, Squires K, Correll T, Fox MC, Pisculli ML. Doravirine/Islatravir (100/0.75 mg) Once-Daily Compared With Bictegravir/Emtricitabine/Tenofovir Alafenamide as Initial HIV-1 Treatment: 48-Week Results From a Phase 3, Randomized, Controlled, Double-Blind, Noninferiority Trial. Clin Infect Dis. 2025 Sep 16;81(2):322-332. doi: 10.1093/cid/ciaf077.

    PubMed 40079835

Questions about this trial

What is this clinical trial studying?

A Phase 3 study testing DOR/ISL and BIC/FTC/TAF in people with HIV-1 Infection, run by Merck Sharp & Dohme LLC at 95 sites in 13 countries.

The full registered description is in the About this study section and the official record.

Who may be eligible to take part?

The sponsor lists 3 inclusion and 11 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.

Is this clinical trial currently recruiting?

The record says: finished, as of the sponsor's last update on 3 Jun 2026. Status can change between updates, so confirm with the study contact before making plans.

Where is the study taking place?

The record lists 95 sites in United States, Italy, France, Spain, South Africa and 8 more countries. Whether a site is taking part right now should be confirmed with that site. See every site.

What are the possible benefits and risks?

They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.

What does this phase mean?

Phase 3 studies compare the treatment with the current standard treatment or a placebo in a large group, to confirm how well it works and watch for side effects.

Not every study follows the same path, and some studies (observational studies, device studies) have no phase.

Are results available for this study?

Yes. Results are posted in the registry (first posted 21 Nov 2023). A summary is in the For doctors view, and the full results are on ClinicalTrials.gov.

How can a doctor refer a patient or contact the research team?

The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.

What does the primary outcome measure?

Percentage of Participants With Human Immunodeficiency Virus (HIV)-1 Ribonucleic Acid (RNA) <50 Copies/mL at Week 48 (time frame: Week 48). The study lists 3 primary outcomes in all. It is what the study was designed to measure, not a finding.

Where can I read the original study information?

On the ClinicalTrials.gov record for NCT04233879, which also lists 1 linked publication.

Does a listing mean the treatment is approved or proven to work?

No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.

How often is this information updated?

AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 3 Jun 2026.

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