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MK-8690

Phase 2

Colitis Ulcerative | Small molecule | Immunology |Merck & Company, Inc.|Last Updated: May 26, 2026

Success Probability
Approval Probability 71%
TA Base Rate26%
Adjusted LOA41%
ML RiskLOW_RISK
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Market & Valuation
rNPV $3.2B
Market Size $9.4B
Revenue Basis $1.6B
Competitors 6
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Trial Design
RandomizedDouble-BlindPLACEBO_CONTROLLEDDMCBiomarker
Total Trials1
Total Enrollment100
FDA Designations
No designations recorded
Clinical Trials (1)
NCT IDTitlePhaseStatusEnrollmentVelocityDesignStartCompletionLast UpdatedSitesCountries
NCT07463183A Study to Evaluate Efficacy and Safety of MK-8690 in Participants With Moderately to Severely Active Ulcerative Colitis (MK-8690-002)PHASE2 RECRUITING 100Mar 24, 2026Dec 21, 2028May 26, 20268 United States
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Study Endpoints
Primary Endpoints
Percentage of Participants Achieving Clinical Remission Per Modified Mayo Score (MMS) at Week 12
Week 12

The MMS is a composite score of UC disease activity on a scale of increasing severity from 0-9, calculated by summing three subscores: Endoscopic subscore (ES), scored on a scale of increasing severity from 0 (normal or inactive disease) to 3 (severe disease, such as spontaneous bleeding or ulceration); Stool frequency subscore (SFS), scored on a scale of increasing frequency from 0 (normal number of stools) to 3 (≥5 stools more than normal per day for the participant); and rectal bleeding subscore (RBS), scored on a scale of increasing severity from 0 (no blood seen) to 3 (blood alone passed). Clinical Remission is defined as an ES of 0 or 1 with no friability, RBS of 0, and SFS of 0 or 1 and not greater than the baseline SFS.

Secondary Endpoints
Percentage of Participants With One or More Adverse Events (AEs)
Up to approximately 12 months
Percentage of Participants Who Discontinued Study Intervention Due to an AE
Up to approximately 12 months
Percentage of Participants Achieving Clinical Response Per MMS at Week 12
Week 12
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Study Design & Arms
AllocationRANDOMIZED
MaskingTRIPLE
ModelPARALLEL
PurposeTREATMENT
Treatment Arms
ArmTypeDescription
Period 1: MK-8690EXPERIMENTALParticipants will receive MK-8690 via subcutaneous injection for 12 weeks.
Period 1: PlaceboPLACEBO_COMPARATORParticipants will receive placebo via subcutaneous injection for 12 weeks.
Period 2: MK-8690EXPERIMENTALParticipants who do not respond to treatment in Period 1 (regardless of treatment assignment in Period 1) will receive MK-8690 via subcutaneous injection for 12 weeks.
Period 3: MK-8690EXPERIMENTALParticipants who respond to treatment in either Period 1 or Period 2 will receive additional MK-8690 via subcutaneous injection for up to approximately 42 weeks.
Interventions
NameTypeDescription
MK-8690DRUGSolution for subcutaneous injection
PlaceboOTHERSolution for subcutaneous injection
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Eligibility Criteria
Age Range18 Years — 75 Years
SexALL
Healthy VolunteersNo
Study Sites8

The main inclusion criteria include but are not limited to the following: * Has had ulcerative colitis (UC) (from onset of symptoms) for at least 3 months before Randomization * Has moderately to severely active UC * Has a weight ≥40 kg * Satisfies at least 1 of the criteria: Has had an inadequate ...

Countries:United States
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Recent Changes (Last 90 Days)
LOWMay 27, 2026NCT07463183lastUpdatePostDate: changed
LOWMay 27, 2026NCT07463183lastUpdatePostDate: changed
LOWMay 26, 2026NCT07463183Status: NOT_YET_RECRUITING → RECRUITING
LOWMay 24, 2026NCT07463183studyFirstPostDate: changed