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TAK-123

Phase 1

Undisclosed | Small molecule | Other |Takeda Pharmaceutical Company Limited|Trials Updated: Nov 20, 2025

TAK-123 development status

Highest phase Phase 1
Registered trials 1 across 1 sponsor since Nov 2019

Success Probability

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Market & Valuation

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Trial Design

UNCONTROLLED
Total Trials1
Total Enrollment10

FDA Designations

No designations recorded

TAK-123 clinical trials

TAK-123 · 1 trial · 1 indication

Phase 1 1
NCT04155567A Study to Evaluate the Pharmacokinetics (PK), Safety and Tolerability of TAK-123 After Intravenous Infusion in Japanese Healthy Adult Male ParticipantsHealthy Volunteers
COMPLETED10 Analytics
PHASE1COMPLETED
A Study to Evaluate the Pharmacokinetics (PK), Safety and Tolerability of TAK-123 After Intravenous Infusion in Japanese Healthy Adult Male Participants
Healthy VolunteersUnlock trial analytics

Study Endpoints

Primary Endpoints

Cmax: Maximum Observed Plasma Concentration for Phenylacetate, Benzoate, and Their Metabolites (Phenylacetylglutamine and Hippurate)
Day 1: pre-infusion and 0.25, 0.75, 1.5, 2.5, 4.5, 6.5, 8.5, 10.5, 12.5, 16.5, 25.5, 26, 26.5, 27, 27.5, 28, 28.5, 29.5, 30.5, 32.5 and 48 hours post-infusion
AUClast: Area Under the Plasma Concentration-Time Curve From Time 0 to the Time of the Last Quantifiable Concentration for Phenylacetate, Benzoate, and Their Metabolites (Phenylacetylglutamine and Hippurate)
Day 1: pre-infusion and 0.25, 0.75, 1.5, 2.5, 4.5, 6.5, 8.5, 10.5, 12.5, 16.5, 25.5, 26, 26.5, 27, 27.5, 28, 28.5, 29.5, 30.5, 32.5 and 48 hours post-infusion
AUC∞: Area Under the Plasma Concentration-time Curve From Time 0 to Infinity for Phenylacetate, Benzoate, and Their Metabolites (Phenylacetylglutamine and Hippurate)
Day 1: pre-infusion and 0.25, 0.75, 1.5, 2.5, 4.5, 6.5, 8.5, 10.5, 12.5, 16.5, 25.5, 26, 26.5, 27, 27.5, 28, 28.5, 29.5, 30.5, 32.5 and 48 hours post-infusion

Secondary Endpoints

Number of Participants Reporting One or More Treatment-emergent Adverse Events (TEAEs)
Day 1 up to Day 8
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Study Design & Arms

AllocationNA
MaskingNONE
ModelSINGLE_GROUP
PurposeTREATMENT

Treatment Arms

ArmTypeDescription
TAK-123EXPERIMENTALTAK-123 as 3.75 gram per square meter (g/m\^2) of sodium phenylacetate and 3.75 g/m\^2 of sodium benzoate, intravenous administration over 90 minutes, followed by TAK-123 as 3.75 g/m\^2 of sodium phenylacetate and 3.75 g/m\^2 of sodium benzoate, intravenous administration over 24 hours.

Interventions

NameTypeDescription
TAK-123DRUGTAK-123 infusion
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Eligibility Criteria

Age Range20 Years to 45 Years
SexMALE
Healthy VolunteersYes
Study Sites1

Inclusion Criteria: 1. The participant is capable of understanding and complying with protocol requirements in the opinion of the investigator or sub-investigator. 2. The participant signs and dates a written informed consent form prior to the initiation of any study procedures. 3. The participant ...

Countries:Japan
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Frequently asked questions about TAK-123

What is TAK-123?

TAK-123 is an investigational small molecule drug being developed by Takeda Pharmaceutical Company Limited. It has been studied in a Phase 1 clinical trial in healthy adult male volunteers in Japan. Takeda has not publicly disclosed the specific disease or condition that TAK-123 is intended to treat.

Who makes TAK-123?

TAK-123 is made by Takeda Pharmaceutical Company Limited, which trades under the ticker TAK. Takeda is the developer responsible for the clinical program evaluating TAK-123, including the Phase 1 pharmacokinetics, safety and tolerability study conducted in Japanese healthy adult male participants.

What phase is TAK-123 in?

TAK-123 is in Phase 1 clinical development. One Phase 1 trial has been completed, and no active trials are currently listed. Because only early-stage testing has been conducted, TAK-123 is investigational and has not been approved by the FDA or any other regulatory agency for commercial use.

What clinical trials is TAK-123 in?

TAK-123 has been evaluated in one completed Phase 1 trial, NCT04155567, titled A Study to Evaluate the Pharmacokinetics (PK), Safety and Tolerability of TAK-123 After Intravenous Infusion in Japanese Healthy Adult Male Participants. The trial enrolled 10 healthy male volunteers aged 20 years and older in Japan and used an uncontrolled design.

How was TAK-123 administered in its clinical trial?

TAK-123 was given by intravenous infusion in its Phase 1 trial, NCT04155567. That study assessed the pharmacokinetics, safety and tolerability of the drug in 10 Japanese healthy adult male participants. The trial was uncontrolled, was not randomized, and was not double blinded, and it has been completed.