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MK8591A-053 A Phase 3, Randomized, Active-Controlled, Double-Blind Clinical Study to Evaluate the Antiretroviral Activity, Safety, and Tolerability of Doravirine/Islatravir (DOR/ISL 100 mg/0.25 mg) Once-Daily in HIV-1 Infected Treatment-Naïve Participants (MK8591A-053)

A Phase 3, Randomized, Active-Controlled, Double-Blind Clinical Study to Evaluate the Antiretroviral Activity,Safety, and Tolerability of Doravirine/Islatravir (DOR/ISL 100 mg/0.25 mg) Once-Daily in HIV-1 InfectedTreatment-Naïve Participants (MK8591A-053)

Status
Recruiting
Phases
Phase 3
Study type
Interventional
Source
PACTR
Registry ID
PACTR202403575006415
Enrollment
110
Registered
2024-03-20
Start date
2023-03-28
Completion date
Unknown
Last updated
2026-09-14

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

Conditions

HIV/AIDS

Interventions

doravirine and islatravir
Placebo to bictegraviremtricitabine tenofoviralafenamide
bictegravir emtricitabinetenofovir alafenamide
Placebo to doravirineislatravir

Sponsors

MSD Pty Ltd
Lead Sponsor

Eligibility

Sex/Gender
All

Inclusion criteria

Inclusion criteria: 1. Is HIV-1 positive with plasma HIV-1 RNA =500 copies/mL at screening. 2.Is naïve to ART defined as havingreceived no prior therapy with anyantiretroviral agent following adiagnosis of HIV-1 infection. 3. Is anindividual of any sex/gender, at least18 years of age, at the time ofproviding documented informedconsent. 4. A participant assignedfemale sex at birth is eligible toparticipate if not pregnant orbreastfeeding. 5. The participant (orlegally acceptable representative)has provided documented informedconsent for the study. Theparticipant may also provideconsent for FBR. However, theparticipant may participate in thestudy without participating in FBR.

Exclusion criteria

Exclusion criteria: 1. Has HIV-2 infection. 2. Hashypersensitivity or othercontraindication to any of thecomponents of the studyinterventions as determined by theinvestigator. 3.Has a diagnosis of anactive AIDS-defining opportunisticinfection within 30 days prior toscreening. 4. Has active HBVinfection (defined as HBsAg-positiveor HBV DNA-positive). 5. Haschronic HCV infection (detectableHCV RNA) with laboratory valuesconsistent with cirrhosis (serumalbumin 1.7 orplatelets <100 x 109 cells/L). 6. Hasa history of malignancy =5 yearsprior to providing documentedinformed consent except foradequately treated basal cell orsquamous cell skin cancer, in situcervical cancer, or cutaneousKaposi’s sarcoma. 7. Has a historyor current evidence of any condition(including active tuberculosisinfection), therapy, laboratoryabnormality, or other circumstance(including drug or alcohol use ordependence) that might, in theopinion of the investigator, confoundthe results of the study or interferewith the participant’s participation forthe full duration of the study, suchthat it is not in the best interest ofthe participant to participate. 8.Hasbeen treated for a viral infectionother than HIV-1, such as hepatitisB, with an agent that is activeagainst HIV-1, including, but notlimited to, the following: adefovir,TDF, TAF, FTC, or 3TC. 9.Is takingor is anticipated to require systemicimmunosuppressive therapy,immune modulators, or strong andmoderate CYP3A inducers (or anyother prohibited therapies outlined inSection 6.5) from 45 days prior toDay 1 through the study treatmentperiod. 10. Is currently participatingin or has participated in a clinicalstudy and received (or is receiving)an investigational compound ordevice from 45 days prior to Day 1through the study treatment period. 11. Has a documented or knownvirologic resistance to any approvedHIV-1 reverse transcriptase inhibitor,or any study intervention.

Design outcomes

Primary

MeasureTime frame
1.Percentage of participants with HIV-1 RNA <50copies/mL 2.Percentage of participants whoexperience AEs and percentage of participants whodiscontinue study intervention due to AEs

Secondary

MeasureTime frame
1. Percentage of participants with HIV-1 RNA <50copies/mL 2. Percentage of participants with HIV-1RNA <200 copies/mL at 3. Mean change frombaseline in CD4+ T-cell count 4. Viral resistance-associated substitutions 5. Mean change frombaseline in weight 6. General safety and tolerability

Countries

Kenya, South Africa

Contacts

Public ContactZoe Nell

Clinical ResearchDirector

zoe.nell@msd.com+276553307

Outcome results

None listed

Source: PACTR (via WHO ICTRP) · Data processed: Sep 19, 2026