Seventeen countries are hosting sites for the Phase III efficacy trials of a monthly PrEP pill, called MK-8527, now known as alimatravir, being developed by Merck (also known as MSD outside of the US and Canada). Merck announced the launch of the Phase III trials at IAS 2025 in Kigali. Alimatravir (AMI) was found to be safe and well-tolerated in Phase II clinical trials.
EXPrESSIVE Phase III Program Countries of Alimatravir
Source of Lenacapavir for PrEP Supply to Early Adopter Countries
The Global Fund, with support from CIFF, and PEPFAR have jointly committed to reaching up to two million people with injectable lenacapavir for PrEP over three years. Supply of LEN began arriving in countries in late 2025 with service delivery starting in early 2026.
Injectable PrEP Regulatory Approvals
This graphic tracks regulatory approvals for injectable cabotegravir and lenacapavir for PrEP as of October 2026. For additional details on product approvals, volumes, implementation, and price comparisons of long-acting PrEP, visit our dashboard on PrEPWatch.org.
HIV Prevention Pipeline: Products to Watch
From the People’s Research Agenda, this graphic tracks the pipeline of potential new HIV prevention options across broadly neutralizing antibodies, preventive vaccines, pre-exposure prophylaxis, and multipurpose technologies.
ARV-Based and Multipurpose Prevention Technology R&D Pipeline
The pipeline of non-vaccine HIV prevention products includes oral pills, vaginal rings, vaginal and rectal gels, vaginal films, long-acting injectable antiretrovirals and more. Also pictured are the range of MPTs in development that aim to reduce the risk of HIV and STIs and/or provide effective contraception for women.
At A Glance: The MPT R&D Pipeline
This graphic shows the status of products in development.
Lenacapavir Regulatory Approval
Regulatory approvals, pending decisions, and appeals as of September 2026. For product approvals, volumes, implementation, and price comparisons of long-acting PrEP, visit our dashboard on PrEPWatch.org.
Years Ahead in HIV Prevention Research: Time to Market
This timeline shows the potential time points when the next-generation of HIV prevention options might find their way into new programs.
People’s Research Agenda 2025 Update Summary Table
The People’s Research Agenda sets out a people-centered framework for equitable and accelerated R&D and product introduction. It tracks the science, shows where investments align—or fail to align—with community-defined priorities, and spotlights critical gaps in the pipeline of prevention options needed to meet the diverse realities of all populations. View this summary table or see the full report and dashboard.
Alimatravir (AMI) Licensing Timeline
This timeline demonstrates the speed of generic licensing for alimatravir (AMI) compared to lenacapavir (LEN) and cabotegravir (CAB).