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MK-8644

Phase 1

Psoriasis | Small molecule | Dermatology |Merck & Company, Inc.|Last Updated: Sep 30, 2026

Development status

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

Success Probability

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Market & Valuation

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Trial Design

RandomizedDouble-BlindPLACEBO_CONTROLLED
Total Trials1
Total Enrollment132

FDA Designations

No designations recorded

Clinical trial landscape

MK-8644 · 1 trial · 2 indications

Phase 1 1
NCT07850310A Clinical Trial of MK-8644 in Healthy Participants and Participants With Psoriasis (MK-8644-001)Psoriasis
NOT YET_RECRUITING132 Analytics
PHASE1NOT YET_RECRUITING
A Clinical Trial of MK-8644 in Healthy Participants and Participants With Psoriasis (MK-8644-001)
PsoriasisUnlock trial analytics

Study Endpoints

Primary Endpoints

Number of Participants Who Experience an Adverse Event (AE)
Up to approximately 43 days

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

Number of Participants Who Discontinue Study Due to an AE
Up to approximately 28 days

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

Secondary Endpoints

Plasma Concentration at 24 Hours (C24) of MK-8644
At designated timepoints up to 24 hours post-dose
Maximum Plasma Concentration (Cmax) of MK-8644
Predose and at designated timepoints up to 4 days post-dose
Time to Maximum Plasma Concentration (Tmax) of MK-8644
Predose and at designated timepoints up to 4 days post-dose
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Study Design & Arms

AllocationRANDOMIZED
MaskingDOUBLE
ModelPARALLEL
PurposeTREATMENT

Treatment Arms

ArmTypeDescription
MK-8644EXPERIMENTALParticipants receive MK-8644 orally under fasted or fed conditions depending on randomization.
PlaceboPLACEBO_COMPARATORParticipants receive matching placebo for MK-8644 orally under fasted or fed conditions depending on randomization.

Interventions

NameTypeDescription
MK-8644DRUGOral administration
Placebo for MK-8644DRUGOral administration
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Eligibility Criteria

Age Range18 Years to 65 Years
SexALL
Healthy VolunteersYes

Inclusion Criteria: The main inclusion criteria include but are not limited to the following: * Is in good health * Has a BMI between 18 and 36 kg/m\^2, inclusive Exclusion Criteria: The main exclusion criteria include but are not limited to the following: * Has a history of clinically signific...

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Recent Changes (Last 90 Days)

LOWSep 30, 2026NCT07850310NEW_TRIAL: changed
LOWSep 30, 2026NCT07850310NEW_TRIAL: changed

Frequently asked questions about MK-8644

What is MK-8644?

MK-8644 is an investigational small molecule being developed by Merck & Company, Inc. (ticker MRK) for psoriasis. It is in Phase 1 clinical development and has not been approved by the FDA. It is being studied in a single trial that includes both healthy participants and participants with psoriasis.

What is MK-8644 used for in psoriasis?

MK-8644 is being studied as a potential treatment for psoriasis. It is an investigational therapy in Phase 1 development, so its use is currently limited to clinical research. The ongoing trial enrolls adults with psoriasis alongside healthy participants to evaluate the drug.

Who makes MK-8644?

MK-8644 is being developed by Merck & Company, Inc., which trades under the ticker MRK. Merck is the sponsor of the Phase 1 clinical program evaluating the small molecule in healthy participants and participants with psoriasis.

What phase is MK-8644 in?

MK-8644 is in Phase 1 clinical development. It is an investigational small molecule and is not FDA approved. The program currently has one active trial, which has not yet started recruiting participants, and no completed trials.

What clinical trials is MK-8644 in?

MK-8644 is being evaluated in one clinical trial, NCT07850310, titled A Clinical Trial of MK-8644 in Healthy Participants and Participants With Psoriasis (MK-8644-001). The Phase 1 study is not yet recruiting, is placebo controlled, randomized, and double blind, and is planned to enroll 132 participants aged 18 years and older.