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MK-8690

Phase 2

Colitis Ulcerative | Small molecule | Gastrointestinal |Merck & Company, Inc.|Last Updated: Aug 31, 2026

Success Probability

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Market & Valuation

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Trial Design

RandomizedDouble-BlindPLACEBO_CONTROLLEDDMC
Total Trials1
Total Enrollment100

FDA Designations

No designations recorded

Clinical trial landscape

MK-8690 · 1 trial · 2 indications

Phase 2 1
NCT07463183A Study to Evaluate Efficacy and Safety of MK-8690 in Participants With Moderately to Severely Active Ulcerative Colitis (MK-8690-002)Colitis Ulcerative
RECRUITING100 Analytics
PHASE2RECRUITING
A Study to Evaluate Efficacy and Safety of MK-8690 in Participants With Moderately to Severely Active Ulcerative Colitis (MK-8690-002)
Colitis UlcerativeUnlock trial analytics

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 to 75 Years
SexALL
Healthy VolunteersNo
Study Sites30

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 StatesColombiaFranceGreeceNetherlandsPolandSouth KoreaUnited Kingdom
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Recent Changes (Last 90 Days)

LOWAug 31, 2026NCT07463183lastUpdatePostDate: changed
LOWAug 31, 2026NCT07463183lastUpdatePostDate: changed
LOWAug 21, 2026NCT07463183lastUpdatePostDate: changed
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LOWJul 31, 2026NCT07463183lastUpdatePostDate: changed
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LOWJul 28, 2026NCT07463183lastUpdatePostDate: changed
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LOWJun 12, 2026NCT07463183lastUpdatePostDate: changed
LOWJun 12, 2026NCT07463183lastUpdatePostDate: changed

Frequently asked questions about MK-8690

What is MK-8690 used for?

MK-8690 is an investigational small molecule being developed for the treatment of moderately to severely active ulcerative colitis, a form of inflammatory bowel disease. It is currently in Phase 2 clinical development and has not been approved by regulatory authorities.

Who makes MK-8690?

MK-8690 is being developed by Merck & Company, Inc., which trades on the New York Stock Exchange under the ticker symbol MRK. The company is conducting a Phase 2 clinical trial to evaluate the drug's efficacy and safety in patients with ulcerative colitis.

What phase is MK-8690 in?

MK-8690 is in Phase 2 clinical development. It is an investigational drug, meaning it has not been approved by the FDA or other regulatory agencies. The ongoing Phase 2 trial is actively recruiting participants with moderately to severely active ulcerative colitis.

What clinical trials is MK-8690 in?

MK-8690 is being studied in one active Phase 2 clinical trial, identified as NCT07463183. This randomized, double-blind, placebo-controlled study is evaluating the efficacy and safety of MK-8690 in approximately 100 participants with moderately to severely active ulcerative colitis across multiple countries.

Is MK-8690 FDA approved?

No, MK-8690 is not FDA approved. It is an investigational drug currently in Phase 2 clinical trials for ulcerative colitis. The ongoing study, NCT07463183, is recruiting participants to evaluate the drug's efficacy and safety, but regulatory approval has not been granted.