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MK-1708

Phase 1

Alzheimer's Disease | Small molecule | Neurology |Merck & Company, Inc.|Last Updated: May 15, 2025

Success Probability

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Market & Valuation

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Trial Design

CONTROLLED
Total Trials1
Total Enrollment12

FDA Designations

No designations recorded

Clinical trial landscape

MK-1708 · 2 trials · 2 indications

Phase 1 2
NCT06647628A Clinical Study of MK-1708 in Healthy Elderly Participants (MK-1708-005)Healthy
COMPLETED16 Analytics
NCT06586606A Study to Evaluate the Effects of Itraconazole on MK-1708 in Healthy Participants (MK-1708-003)Alzheimer's Disease
COMPLETED12 Analytics
PHASE1COMPLETED
A Clinical Study of MK-1708 in Healthy Elderly Participants (MK-1708-005)
HealthyUnlock trial analytics
PHASE1COMPLETED
A Study to Evaluate the Effects of Itraconazole on MK-1708 in Healthy Participants (MK-1708-003)
Alzheimer's DiseaseUnlock trial analytics

Study Endpoints

Primary Endpoints

Number of participants with ≥1 adverse event (AE)
Up to 14 days after the last dose
Number of participants discontinuing study therapy due to AE
Up to ~2 weeks
Area under the plasma concentration-time curve from dosing to 24 hours postdose (AUC0-24) of multiple MK-1708 doses
At designated time points up to ~2 weeks
Maximum plasma concentration (Cmax) of multiple MK-1708 doses
At designated time points up to ~20 days
Time to maximum plasma concentration (Tmax) of multiple MK-1708 doses
At designated time points up to ~20 days
Concentration 24 hours postdose (C24) of multiple MK-1708 doses
At designated time points up to ~2 weeks
Apparent oral clearance (CL/F) of multiple MK-1708 doses, at steady state
At designated time points up to ~20 days
Apparent volume of distribution (Vz/F) of multiple MK-1708 doses, at steady state
At designated time points up to ~20 days
Apparent terminal half-life (t½) of multiple MK-1708 doses
At designated time points up to ~20 days
AUC0-24 accumulation ratio of multiple MK-1708 doses
At designated time points up to ~2 weeks
Cmax accumulation ratio of multiple MK-1708 doses
At designated time points up to ~20 days
C24 accumulation ratio of multiple MK-1708 doses
At designated time points up to ~2 weeks
Area Under the Concentration-Time Curve from Time 0 to Infinity (AUC0-Inf) of MK-1708
Predose and at designated timepoints up to approximately 2 weeks postdose

Blood samples will be collected to determine the AUC0-inf of MK-1708.

Number of Participants Who Experience an Adverse Event (AE)
Up to approximately 11 weeks

An AE is any untoward medical occurrence in a participant, temporally associated with the use of study treatment, whether or not considered related to the study treatment. The number of participants who experience an AE will be reported.

Number of Participants Who Discontinue Study Due to an AE
Up to approximately 11 weeks

An AE is any untoward medical occurrence in a participant, temporally associated with the use of study treatment, whether or not considered related to the study treatment. The number of participants who discontinue study due to an AE will be reported.

Secondary Endpoints

Area Under the Concentration-Time Curve from Time 0 to Last Quantifiable Concentration (AUC0-Last) of MK-1708
Predose and at designated timepoints up to approximately 2 weeks postdose
Maximum Plasma Concentration (Cmax) of MK-1708
Predose and at designated timepoints up to approximately 2 weeks postdose
Time to Maximum Plasma Concentration (Tmax) of MK-1708
Predose and at designated timepoints up to approximately 2 weeks postdose
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Study Design & Arms

AllocationRANDOMIZED
MaskingTRIPLE
ModelSEQUENTIAL
PurposeBASIC_SCIENCE

Treatment Arms

ArmTypeDescription
MK-1708 Dosage 1EXPERIMENTALParticipants receive multiple doses of MK-1708 dosage 1.
MK-1708 Dosage 2EXPERIMENTALParticipants receive multiple doses of MK-1708 dosage 2.
PlaceboPLACEBO_COMPARATORParticipants receive multiple doses of placebo.
Period 1: MK-1708EXPERIMENTALParticipants will receive a single oral dose of MK-1708 on Day 1.
Period 2: MK-1708 and ItraconazoleEXPERIMENTALA washout period of at least 10 days will occur between MK-1708 dosing in Period 1 and the first itraconazole dosing in Period 2. In Period 2, participants will receive itraconazole twice daily on Day 1 and once daily on Days 2 through Day 19. Participants will also receive a single oral dose of MK-1708 on Day 4.

Interventions

NameTypeDescription
MK-1708DRUGMK-1708 oral suspension
PlaceboDRUGPlacebo oral suspension
ItraconazoleDRUGOral administration
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Eligibility Criteria

Age Range65 Years to 85 Years
SexALL
Healthy VolunteersYes
Study Sites1

Inclusion Criteria: The key inclusion criteria include but are not limited to the following: * Is in good health before randomization * Has a body mass index (BMI) ≥18 and ≤32 kg/m\^2, inclusive Exclusion Criteria: The key exclusion criteria include but are not limited to the following: * Has a...

Countries:United States
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Frequently asked questions about MK-1708

What is MK-1708 used for?

MK-1708 is an investigational small molecule being developed by Merck & Company, Inc. (MRK) for Alzheimer's disease. It is currently in Phase 1 clinical development, with studies conducted in healthy participants and healthy elderly participants to evaluate its safety and pharmacokinetics.

Who makes MK-1708?

MK-1708 is being developed by Merck & Company, Inc., a pharmaceutical company traded on the New York Stock Exchange under the ticker symbol MRK. The drug is an investigational small molecule in Phase 1 clinical development for Alzheimer's disease.

What phase is MK-1708 in?

MK-1708 is in Phase 1 clinical development. It is an investigational drug, not yet approved by regulatory authorities. Two Phase 1 studies have been completed, both in the United States, involving healthy participants and healthy elderly participants.

What clinical trials is MK-1708 in?

MK-1708 has been studied in two completed Phase 1 trials: NCT06586606, which evaluated the effects of itraconazole on MK-1708 in healthy participants with Alzheimer's disease, and NCT06647628, a study of MK-1708 in healthy elderly participants. Both trials were conducted in the United States.

Is MK-1708 the same as any other drug?

MK-1708 is the investigational code name for this drug candidate. No alternative names have been disclosed, and it is not known to be the same as any other marketed or investigational drug.