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MK-0947

Phase 1

Parkinson's Disease (PD) | Small molecule | Neurology |Merck & Company, Inc.|Last Updated: Jun 26, 2026

Target and mechanism

ModalitySmall molecule

Also known as [18F]MK-0947

Success Probability

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Market & Valuation

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Trial Design

CONTROLLEDBiomarker
Total Trials1
Total Enrollment22

FDA Designations

No designations recorded

Clinical trial landscape

MK-0947 · 1 trial · 3 indications

Early Phase 1 1
NCT07348250Open-label Study to Evaluate Brain α-Synuclein Deposition Using PET and [18F]MK-0947 in Parkinson's DiseaseParkinson's Disease (PD)
RECRUITING22 Analytics
EARLY_PHASE1RECRUITING
Open-label Study to Evaluate Brain α-Synuclein Deposition Using PET and [18F]MK-0947 in Parkinson's Disease
Parkinson's Disease (PD)Unlock trial analytics

Study Endpoints

Primary Endpoints

Safety of [18F]MK-0947: Incidence of Adverse Events
Up to 4 months

Incidence of adverse events (AEs) following administration

Safety of [18F]MK-0947: Radiation absorbed dose estimates
4 months

Radiation absorbed dose estimates following administration derived from PET imaging and dosimetry calculations.

Secondary Endpoints

Brain uptake of [18F]MK-0947
Up to 36 days
Model-derived Pharmacokinetics of [18F]MK-0947
Up to 36 days
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Study Design & Arms

AllocationNON_RANDOMIZED
MaskingNONE
ModelSEQUENTIAL
PurposeDIAGNOSTIC

Treatment Arms

ArmTypeDescription
Part 1 - Brain ImagingEXPERIMENTALParticipants receive \[18F\]MK-0947 for PET imaging of the brain.
Part 2 - DosimetryEXPERIMENTALHealthy participants receive \[18F\]MK-0947 for whole-body dosimetry.

Interventions

NameTypeDescription
[18F]MK-0947DRUGPET radiopharmaceutical selective for α-synuclein, administered IV at doses up to 10 mCi.
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Eligibility Criteria

Age Range18 Years to 80 Years
SexALL
Healthy VolunteersYes
Study Sites2

Inclusion Criteria: * Signed informed consent prior to any study procedures * Women of childbearing potential: abstinent or use 2 contraception methods (one barrier) during study and 90 days post last injection * Men: use 2 contraception methods and refrain from sperm donation during study and 90 d...

Countries:United States
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Frequently asked questions about MK-0947

What is MK-0947 used for in Parkinson's Disease?

MK-0947 is an investigational small molecule being studied for use in Parkinson's Disease (PD). It is a positron emission tomography (PET) imaging agent, also known as [18F]MK-0947, designed to evaluate brain alpha-synuclein deposition. It is currently in Phase 1 clinical development and is not yet approved.

What does MK-0947 target?

MK-0947 targets alpha-synuclein, a protein that forms clumps in the brains of people with Parkinson's Disease. As a PET imaging agent, it is designed to bind to alpha-synuclein deposits so they can be visualized on a brain scan, potentially aiding in the diagnosis and monitoring of Parkinson's Disease.

Who makes MK-0947?

MK-0947 is being developed by Merck & Company, Inc., a pharmaceutical company traded on the New York Stock Exchange under the ticker symbol MRK. The company is conducting a Phase 1 clinical trial of this investigational PET imaging agent for Parkinson's Disease.

What phase is MK-0947 in?

MK-0947 is in Phase 1 clinical development. It is an investigational drug, meaning it has not been approved by regulatory authorities. The ongoing trial is an early Phase 1 study, currently recruiting participants in the United States to evaluate the agent's safety and imaging properties.

What clinical trials is MK-0947 in?

MK-0947 is being studied in one clinical trial, registered as NCT07348250. This is an open-label, early Phase 1 study titled 'Open-label Study to Evaluate Brain α-Synuclein Deposition Using PET and [18F]MK-0947 in Parkinson's Disease.' The trial is recruiting 22 participants in the United States and includes healthy volunteers.

Is MK-0947 the same as [18F]MK-0947?

Yes, MK-0947 is also known as [18F]MK-0947. The [18F] designation indicates that the molecule is labeled with the radioactive isotope fluorine-18, which enables it to be detected by positron emission tomography (PET) imaging. Both names refer to the same investigational compound.