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MK-0947

Phase 1

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

MK-0947 development status

Highest phase Phase 1
Registered trials 1 across 1 sponsor since Jan 2026

MK-0947 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

CONTROLLED
Total Trials1
Total Enrollment22

FDA Designations

No designations recorded

MK-0947 clinical trials

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 imaging agent being studied for use in Parkinson's disease. It is designed to evaluate alpha-synuclein deposition in the brain using positron emission tomography (PET). It is not a treatment for Parkinson's disease; it is a diagnostic tool intended to help visualize a key protein associated with the condition.

Who is developing MK-0947?

MK-0947 is being developed by Merck & Company, Inc., which trades under the ticker symbol MRK. Merck is the sponsor of the clinical research program for this imaging agent.

What phase is MK-0947 in?

MK-0947 is in Phase 1 clinical development. The only registered trial is an early Phase 1 study, and it is currently recruiting participants. The drug is investigational and has not been approved by the FDA.

What clinical trials is MK-0947 in?

MK-0947 is being studied in one clinical trial, NCT07348250, titled "Open-label Study to Evaluate Brain α-Synuclein Deposition Using PET and [18F]MK-0947 in Parkinson's Disease." The trial is recruiting and plans to enroll 22 participants in the United States.

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

Yes, MK-0947 is also known as [18F]MK-0947. The bracketed notation indicates the molecule is labeled with fluorine-18, a radioactive isotope used in PET imaging. Both names refer to the same investigational imaging agent.