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TAK-781

Phase 1

Healthy Volunteers | Small molecule | Gastrointestinal |Takeda Pharmaceutical Company Limited|Last Updated: Mar 5, 2026

Success Probability

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Market & Valuation

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Trial Design

RandomizedDouble-BlindPLACEBO_CONTROLLEDDMC
Total Trials1
Total Enrollment134

FDA Designations

No designations recorded

Clinical trial landscape

TAK-781 · 1 trial · 2 indications

Phase 1 1
NCT07229911A Study of TAK-781 in Healthy Volunteers and in Participants With Non-Cirrhotic Primary Sclerosing Cholangitis (PSC)Healthy Volunteers
RECRUITING134 Analytics
PHASE1RECRUITING
A Study of TAK-781 in Healthy Volunteers and in Participants With Non-Cirrhotic Primary Sclerosing Cholangitis (PSC)
Healthy VolunteersUnlock trial analytics

Study Endpoints

Primary Endpoints

Phase 1a (SAD and MAD) and Phase 1b: Number of Participants With Treatment-emergent Adverse Events (TEAEs)
Phase 1a (SAD) and 1b: From start of study drug administration up to End of Treatment (EOT)/Early termination (ET) (up to Week 20); Phase 1a (MAD): From start of study drug administration up to EOT/ET (up to Week 32)

An AE is any untoward medical occurrence in a clinical trial participant, temporally associated with the use of the trial intervention, whether or not the occurrence is considered related to the trial intervention. TEAE is defined as any event emerging or manifesting at or after the initiation of treatment with a trial intervention or medicinal product or any existing event that worsens in either intensity or frequency following exposure to the trial intervention.

Phase 1a (SAD and MAD) and Phase 1b: Number of Participants With Clinically Significant Changes in Clinical Laboratory Values
Phase 1a (SAD) and 1b: From start of study drug administration up to EOT/ET (up to Week 20); Phase 1a (MAD): From start of study drug administration up to EOT/ET (up to Week 32)

Laboratory parameters will include hematology, chemistry and urinalysis. Any clinically significant change in laboratory values will be determined at the investigator's discretion.

Phase 1a (SAD and MAD) and Phase 1b: Number of Participants With Clinically Significant Changes in 12-Lead Electrocardiogram (ECG) Parameters
Phase 1a (SAD) and 1b: From start of study drug administration up to EOT/ET (up to Week 20); Phase 1a (MAD): From start of study drug administration up to EOT/ET (up to Week 32)

The 12-lead ECG will be evaluated. Any clinically significant change in ECG assessment will be determined at the investigator's discretion.

Phase 1a (SAD and MAD) and Phase 1b: Number of Participants With Clinically Significant Changes in Vital Sign Values
Phase 1a (SAD) and 1b: From start of study drug administration up to EOT/ET (up to Week 20); Phase 1a (MAD): From start of study drug administration up to EOT/ET (up to Week 32)

Vital signs will include measurement of oral body temperature, supine blood pressure and heart rate. Any clinically significant change in vital signs will be determined at the investigator's discretion.

Secondary Endpoints

Phase 1a and 1b: Maximum Observed Plasma Concentration (Cmax) of TAK-781
Predose up to 2 days post-dose
Phase 1a and 1b: Time of First Occurrence of Plasma Cmax (Tmax) of TAK-781
Predose up to 2 days post-dose
Phase 1a and 1b: Area Under the Plasma Concentration-time Curve From Time 0 to Infinity (AUCinf) of TAK-781
Predose up to 2 days post-dose
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Study Design & Arms

AllocationRANDOMIZED
MaskingDOUBLE
ModelPARALLEL
PurposeTREATMENT

Treatment Arms

ArmTypeDescription
Phase 1a (Part 1): TAK-781 SADEXPERIMENTALHealthy participants will receive a single dose of TAK-781 injection at different dose level cohorts (1-6) on Day 1 of the pre-defined treatment period. An additional cohort may be added to repeat a selected dose from one of the previously tested dose levels in order to assess safety and tolerability and/or to verify the level of target engagement (TE).
Phase 1a (Part 1): Placebo SADPLACEBO_COMPARATORHealthy participants will receive TAK-781 matching placebo injection on Day 1 of the pre-defined treatment period.
Phase 1a (Part 2): TAK-781 MADEXPERIMENTALHealthy participants will receive multiple doses of TAK-781 injection across five cohorts (1 to 5), with or without a loading dose during the pre-defined treatment period. An additional cohort may be added to repeat a selected dose level and/or dosing regimen from one of the previously tested dose levels and/or dosing regimens in order to assess safety and tolerability, and/or to verify the level of TE.
Phase 1a (Part 2): Placebo MADPLACEBO_COMPARATORHealthy participants will receive multiple doses of TAK-781 matching placebo injection, with or without a loading dose during the pre-defined treatment period.
Phase 1b (Part 3): TAK-781EXPERIMENTALParticipants with non-cirrhotic PSC will receive a single dose of TAK-781 injection on Day 1 during the pre-defined treatment period. Part 3 will not begin until the SAD portion of the trial is considered complete.

Interventions

NameTypeDescription
TAK-781DRUGTAK-781 injection.
PlaceboDRUGTAK-781 matching placebo injection.
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Eligibility Criteria

Age Range18 Years to 68 Years
SexALL
Healthy VolunteersYes
Study Sites1

Inclusion Criteria: Phase 1a (SAD and MAD) 1. The participant is willing and able to fully comply with all trial procedures and requirements, in the investigator's opinion. 2. The participant has provided informed consent (that is, in writing, documented via a signed and dated informed consent form...

Countries:United States
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Frequently asked questions about TAK-781

What is TAK-781 used for?

TAK-781 is an investigational small molecule being studied for gastrointestinal conditions. It is currently in a Phase 1 clinical trial that includes healthy volunteers and participants with non-cirrhotic primary sclerosing cholangitis (PSC). The trial is recruiting in the United States.

Who makes TAK-781?

TAK-781 is being developed by Takeda Pharmaceutical Company Limited, which trades under the ticker TAK. The drug is currently in Phase 1 clinical development.

What phase is TAK-781 in?

TAK-781 is in Phase 1 clinical development. It is an investigational drug and has not been approved by regulatory authorities. The ongoing Phase 1 trial is recruiting participants in the United States.

What clinical trials is TAK-781 in?

TAK-781 is being studied in one Phase 1 clinical trial with the identifier NCT07229911. The trial is titled 'A Study of TAK-781 in Healthy Volunteers and in Participants With Non-Cirrhotic Primary Sclerosing Cholangitis (PSC)' and is currently recruiting.

Is TAK-781 being studied in primary sclerosing cholangitis?

Yes, TAK-781 is being studied in a Phase 1 trial that includes participants with non-cirrhotic primary sclerosing cholangitis (PSC). The trial also enrolls healthy volunteers and is being conducted in the United States.