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Open-label, Follow-up of Doravirine/Islatravir (DOR/ISL 100 mg/0.75mg) for Participants With Human Immunodeficiency Virus-1 (HIV-1) Infection (MK-8591A-033)

A Phase 3 Open-label Rollover Clinical Study of Doravirine/Islatravir (DOR/ISL) Once-daily for the Treatment of HIV-1 Infection in Participants Who Previously Received DOR/ISL in a Phase 2 or Phase 3 DOR/ISL Clinical Study

Status
Active, not recruiting
Phases
Phase 3
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT04776252
Enrollment
2000
Registered
2021-03-01
Start date
2021-09-15
Completion date
2029-05-29
Last updated
2025-12-23

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

Conditions

HIV-1 Infection

Brief summary

The safety and tolerability of MK-8591A, a 2-drug fixed dose combination (FDC) of doravirine (100mg) and islatravir (0.75mg) \[DOR/ISL 100 mg/0.75 mg) will be evaluated in participants with Human Immunodeficiency Virus -1 (HIV-1) who were treated with DOR and ISL in earlier clinical studies.

Detailed description

As of Amendment 12, participants will have the option to continue receiving DOR/ISL (100 mg/0.75 mg) until treatment alternatives are identified, or up to Week 288 given that participants are still deriving benefit, based on individual benefit/risk assessment.

Interventions

FDC tablet of 100 mg doravirine, 0.75 mg islatravir taken orally, once daily for up to 192 weeks

Sponsors

Merck Sharp & Dohme LLC
Lead SponsorINDUSTRY

Study design

Allocation
NA
Intervention model
SINGLE_GROUP
Primary purpose
TREATMENT
Masking
NONE

Eligibility

Sex/Gender
ALL
Age
18 Years to No maximum
Healthy volunteers
No

Inclusion criteria

* Is currently receiving DOR 100 mg/ISL 0.75 mg adult FDC tablet in an MSD-sponsored clinical study and has completed the last treatment visit. * Is considered by the investigator to have derived clinical benefit from receiving DOR/ISL and for whom further treatment with DOR/ISL is considered clinically appropriate. * Female is not pregnant or breastfeeding, and at least one of the following conditions applies: Is not a woman of childbearing potential (WOCBP); or is a non-pregnant WOCBP who agrees to the following during the intervention period and for at least 6 weeks after the last dose of study intervention: Not be sexually active, or if sexually active, to use an acceptable method of contraception; or is pregnant and continues to receive study intervention (where allowed by local regulations and as appropriate based on available data/local standard-of-care guidelines)

Exclusion criteria

* Is taking or is anticipated to require any prohibited therapies.

Design outcomes

Primary

MeasureTime frameDescription
Participants with serious adverse events (SAEs)Up to Week 198Percentage of participants with serious adverse events (SAEs)
Participants who discontinued due to an adverse event (AE)Up to Week 192Percentage of participants who discontinued study treatment due to an AE.

Countries

Australia, Canada, Chile, Colombia, France, Germany, Italy, Japan, New Zealand, Poland, Russia, South Africa, Spain, Switzerland, United Kingdom, United States

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Feb 4, 2026