ULO is named as a drug or biological intervention in 2 clinical trials in our USA trial register, 1 of which is recruiting. The lead sponsor is Merck Sharp & Dohme LLC. Registered phases: Phase 2/3 and Phase 2. Conditions studied include Human Immunodeficiency Virus Type 1 (HIV-1) Infection.
| NCT ID | Study | Phase | Status |
|---|---|---|---|
| NCT07266831 | A Clinical Study of Islatravir and Ulonivirine for People With HIV-1 Who Have Not Been Treated Before (MK-8591B-062) Human Immunodeficiency Virus Type 1 (HIV-1) Infection |
Phase 2/3 | Recruiting |
| NCT06891066 | A Study of Islatravir (ISL) and Ulonivirine (ULO) Once Weekly (QW) in Virologically Suppressed Adults With Human Immunodeficiency Virus Type 1 (HIV-1) (MK-8591B-060) (ClinicalTrials.gov ↗) Human Immunodeficiency Virus Type 1 (HIV-1) Infection |
Phase 2 | Active, closed |
Registers list studies that are recruiting, about to open, active but closed to enrolment, or enrolling by invitation. The UK and USA registers cover industry-sponsored studies only. Trial titles and statuses are copied from the registry as published.
| Condition (as registered) | Trials |
|---|---|
| Human Immunodeficiency Virus Type 1 (HIV-1) Infection | 2 |
| Lead sponsor | Trials |
|---|---|
| Merck Sharp & Dohme LLC | 2 |
| Register | ULO trials |
|---|---|
| Clinical trials in USA | 2 |
A trial with sites in more than one country appears in each of those registers.
Everything on this page is copied from public ClinicalTrials.gov registry records — it is not written from memory, and nothing here describes how ULO works or whether it is effective. Each trial links to its own record so you can check it yourself.
This page is built automatically: a daily sync job reads the registry records behind our country trial registers, collects every trial that lists ULO (or a registered synonym) as a drug or biological intervention, and tabulates the registry fields directly. Placebos and generic comparators are excluded. There is no AI drafting and no per-compound editorial pass, and the page has not been clinically reviewed. The “last verified” date above is the timestamp of that sync, not a review date. Our general editorial approach is described in our editorial standards and corrections policy. The ClinicalTrials.gov data on this page was last retrieved on 24 Sep 2026.