Recent Updates
Recently added Catalysts

MK-8527

Phase 3

Human Immunodeficiency Virus (HIV) | Small molecule | Infectious Disease |Merck & Company, Inc.|Last Updated: Jun 8, 2026

Success Probability
Approval Probability 71%
TA Base Rate26%
Adjusted LOA41%
ML RiskLOW_RISK
Premium
Market & Valuation
rNPV $3.2B
Market Size $9.4B
Revenue Basis $1.6B
Competitors 6
Premium
Trial Design
RandomizedDouble-BlindACTIVE_CONTROLLEDDMCBiomarker
Total Trials4
Total Enrollment8,998
FDA Designations
No designations recorded
Clinical Trials (4)
NCT IDTitlePhaseStatusEnrollmentVelocityDesignStartCompletionLast UpdatedSitesCountries
NCT07071623A Study of MK-8527 to Prevent Human Immunodeficiency Virus Type 1 (HIV-1) (MK-8527-010)PHASE3 RECRUITING 4,580Nov 10, 2025Oct 18, 2027Jun 1, 202630 Kenya, South Africa +1
NCT07044297A Clinical Study of MK-8527 to Prevent Human Immunodeficiency Virus Type 1 (HIV-1) (MK-8527-011)PHASE3 RECRUITING 4,390Jul 31, 2025Jul 22, 2027Jun 8, 202681 United States, Argentina +14
NCT07600775A Clinical Trial of MK-8527 and Rifampin in Adult Participants With Latent Tuberculosis Infection (MK-8527-019)PHASE1 NOT YET_RECRUITING 14Jun 22, 2026Dec 22, 2026May 22, 2026 -
NCT06783192A Drug-Drug Interaction Study of MK 8527 With a Combined Oral Contraceptive (LNG/EE)PHASE1 COMPLETED 14Aug 14, 2023Oct 11, 2023Jan 20, 20251 United States
Unlock Drug Trial Details
Study Endpoints
Primary Endpoints
Number of Participants with Adjudicated Human Immunodeficiency Virus Type 1 (HIV-1) Infection
Up to ~2 years

The number of participants with adjudicated HIV-1 infection will be presented.

Number of Participants who Experience At Least One Adverse Event (AE)
Up to ~2 years

An AE is any untoward medical occurrence in a clinical study participant, temporally associated with the use of study intervention, whether or not considered related to the study intervention. The number of participants that experienced AEs will be presented.

Number of Participants who Discontinue Study Intervention Due to an AE
Up to ~2 years

An AE is any untoward medical occurrence in a clinical study participant, temporally associated with the use of study intervention, whether or not considered related to the study intervention. The number of participants that discontinued study intervention due to an AE will be presented.

Area Under the Concentration-Time Curve From Time Zero to Infinity (AUC0-inf) of MK-8527
At designated time points (up to approximately 2 weeks)

Blood samples will be collected to determine the AUC0-inf of MK-8527 in plasma.

Area under the curve from dosing to infinity (AUC0-∞) of LNG alone and with MK-8527
Up to ~96 hours postdose
Maximum plasma concentration (Cmax) of LNG alone and with MK-8527
Up to ~96 hours postdose
Time to Cmax (Tmax) of LNG alone and with MK-8527
Up to ~96 hours postdose
Apparent half-life (t½) of LNG alone and with MK-8527
Up to ~96 hours postdose
AUC0-∞ of EE alone and with MK-8527
Up to ~72 hours postdose
Tmax of EE alone and with MK-8527
Up to ~72 hours postdose
Secondary Endpoints
Area Under the Concentration-Time Curve From Time Zero to Last Quantifiable Concentration (AUC0-last) of MK-8527
At designated time points (up to approximately 2 weeks)
Area Under the Concentration-Time Curve From Time Zero to 336 Hours (AUC0-336) of MK-8527
At designated time points (up to approximately 2 weeks)
Maximum Plasma Concentration (Cmax) of MK-8527
At designated time points (up to approximately 2 weeks)
Unlock Study Endpoints
Study Design & Arms
AllocationRANDOMIZED
MaskingQUADRUPLE
ModelPARALLEL
PurposePREVENTION
Treatment Arms
ArmTypeDescription
MK-8527 + Placebo to FTC/TDFEXPERIMENTALParticipants will receive 11 mg MK-8527 once monthly (QM) and placebo matched to Emtricitabine/Tenofovir Disoproxil Fumarate (FTC/TDF) once daily (QD) for up to approximately 2 years. Participants will then receive open-label 200 mg FTC/245 mg TDF QD for an additional 28 days.
FTC/TDF + Placebo to MK-8527ACTIVE_COMPARATORParticipants will receive 200 mg FTC/245 mg TDF QD and placebo matched to MK-8527 QM for up to approximately 2 years. Participants will then receive open-label 200 mg FTC/245 mg TDF QD for an additional 28 days.
MK-8527EXPERIMENTALParticipants will receive 11 mg MK-8527 once monthly (QM) and placebo to FTC/TDF once daily (QD) for up to approximately 2 years. Participants will then receive open-label 200 mg FTC/245 mg TDF QD for an additional 28 days.
FTC/TDFACTIVE_COMPARATORParticipants will receive 200 mg FTC/245 mg TDF QD and placebo to MK-8527 QM for up to approximately 2 years. Participants will then receive open-label 200 mg FTC/245 mg TDF QD for an additional 28 days.
MK-8527 + RifampinEXPERIMENTALParticipants receive single doses of MK-8527 alone and in combination with daily doses of rifampin.
Arm 1: All ParticipantsEXPERIMENTALParticipants receive single doses of LNG/EE alone and in combination with a single dose of MK-8527.
Interventions
NameTypeDescription
MK-8527DRUGOral tablet
Emtricitabine/tenofovir disoproxil (FTC/TDF)DRUGOral tablet
Placebo matched to MK-8527DRUGPlacebo oral tablet matched to MK-8527
Placebo matched to FTC/TDFDRUGPlacebo oral tablet matched to FTC/TDF
FTC/TDFDRUGOral tablet
Placebo to MK-8527DRUGPlacebo tablet matched to MK-8527
Placebo to FTC/TDFDRUGPlacebo tablet matched to FTC/TDF
RifampinDRUGAdministered orally
LNG/EEDRUGLNG/EE combination tablet taken by mouth.
Unlock Study Design Details
Eligibility Criteria
Age Range16 Years — 30 Years
SexFEMALE
Healthy VolunteersYes
Study Sites30

Inclusion Criteria: The main inclusion criteria include but are not limited to the following: * Is confirmed Human Immunodeficiency Virus (HIV)-uninfected based on negative HIV-1/HIV-2 test results * Has been sexually active (2 vaginal intercourse encounters with cisgender male individual(s) withi...

Countries:KenyaSouth AfricaUgandaUnited StatesArgentinaBrazilChileColombiaDominican RepublicFranceGuatemalaMalaysiaPeruPhilippinesSwitzerlandThailandVietnam
Unlock Eligibility Criteria
Recent Changes (Last 90 Days)
LOWJun 8, 2026NCT07044297lastUpdatePostDate: changed
LOWJun 8, 2026NCT07044297lastUpdatePostDate: changed
LOWJun 8, 2026NCT07044297lastUpdatePostDate: changed
LOWJun 2, 2026NCT07071623lastUpdatePostDate: changed
LOWJun 2, 2026NCT07044297lastUpdatePostDate: changed
LOWJun 2, 2026NCT07071623lastUpdatePostDate: changed
LOWJun 2, 2026NCT07044297lastUpdatePostDate: changed
LOWJun 2, 2026NCT07071623lastUpdatePostDate: changed
LOWJun 2, 2026NCT07044297lastUpdatePostDate: changed
LOWMay 26, 2026NCT07071623primaryCompletionDate: changed
LOWMay 26, 2026NCT07044297primaryCompletionDate: changed
LOWMay 24, 2026NCT07071623studyFirstPostDate: changed
LOWMay 24, 2026NCT07044297studyFirstPostDate: changed