HIV Prevention Pipeline: the latest in Research & Development and more

The HIV prevention pipeline has evolved: Few products are in late stage or efficacy trials, newly proven products are rolling out, and early phase clinical trials are exploring innovative strategies.

R&D is focused on ARV and non-ARV based prevention products and HIV vaccines that build on new knowledge about the virus. The late-stage trials of recent years and basic science have brought deepening insights that are being applied today to a diversity of ‘upstream’ interventions.

• MK-8527: Merck announced a new Phase 2a trial to evaluate the safety, tolerability, and pharmacokinetics of a monthly oral pill, MK-8527. The trial began in November 2023 in participants at low-risk for HIV acquisition. If successful, Phase 3 trials could start in 2025. Public statements suggest that Merck intends for MK-8527 to replace ISL as its monthly oral PrEP candidate. MK-8527 QM for PrEP launch estimate is 2029+

• PURPOSE Program: A new Phase 2 study, PURPOSE 5, will evaluate lenacapavir as a twice-yearly prevention option in France and the United Kingdom, as part of the larger PURPOSE program. Purpose 5 is recruiting participants who are disproportionally affected and often underrepresented in HIV clinical trials. PURPOSE 1 and 2 are Phase 3 efficacy studies in Argentina, Brazil, Mexico South Africa, Thailand, Uganda and the United States. PURPOSE 3 & 4 are smaller studies focused on populations facing disproportionate risk.

• The Dual Prevention Pill (DPP): In September, the DPP, which would protect against pregnancy and HIV, moved to the next stage in R&D. A pilot bioequivalence study has shown the pill’s combined drugs—an antiretroviral and a contraceptive—are absorbed at an equivalent rate as taking them separately. The DPP now moves to a larger bioequivalence study needed for a regulatory submission. Check out the updated DPP Market Preparation and Introduction Strategy for highlights. The Population Council and Medicines360 are also developing a second-generation DPP with F/TAF.

Visit the Global PrEP Tracker 

Take a look at where we are in HIV prevention

This timeline shows the potential time points when the next-generation of HIV prevention options might find their way into new programs. (download the picture)