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TAK-771

Phase 3

Chronic Inflammatory Demyelinating Polyradiculoneuropathy (CIDP) | Small molecule | Neurology |Takeda Pharmaceutical Company Limited|Last Updated: Jun 24, 2026

Success Probability

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Trial Design

CONTROLLED
Total Trials1
Total Enrollment26

FDA Designations

No designations recorded

Clinical trial landscape

TAK-771 · 3 trials · 3 indications

Phase 3 3
NCT05513586A Study to Evaluate the Long-term Safety of TAK-771 in Japanese Primary Immunodeficiency Disease (PID) ParticipantsPrimary Immunodeficiency Diseases (PID)
COMPLETED15 Analytics
NCT05150340A Study of TAK-771 in Japanese People With Primary Immunodeficiency Diseases (PID)Primary Immunodeficiency Diseases (PID)
COMPLETED16 Analytics
NCT05084053A Study of TAK-771 in Japanese Participants With Chronic Inflammatory Demyelinating Polyradiculoneuropathy (CIDP) and Multifocal Motor Neuropathy (MMN)Chronic Inflammatory Demyelinating Polyradiculoneuropathy (CIDP)
COMPLETED26 Analytics
PHASE3COMPLETED
A Study to Evaluate the Long-term Safety of TAK-771 in Japanese Primary Immunodeficiency Disease (PID) Participants
Primary Immunodeficiency Diseases (PID)Unlock trial analytics
PHASE3COMPLETED
A Study of TAK-771 in Japanese People With Primary Immunodeficiency Diseases (PID)
Primary Immunodeficiency Diseases (PID)Unlock trial analytics
PHASE3COMPLETED
A Study of TAK-771 in Japanese Participants With Chronic Inflammatory Demyelinating Polyradiculoneuropathy (CIDP) and Multifocal Motor Neuropathy (MMN)
Chronic Inflammatory Demyelinating Polyradiculoneuropathy (CIDP)Unlock trial analytics

Study Endpoints

Primary Endpoints

Percentage of Participants With Treatment-Emergent Adverse Events (TEAEs)
From start of study drug administration up to end of study (up to 3.1 years)

An Adverse event (AE) was any untoward medical occurrence in a clinical investigation participant administered a pharmaceutical product that does not necessarily have a causal relationship with this treatment. An AE can therefore be any unfavorable and unintended sign (including a clinically significant laboratory finding), symptom, or disease temporally associated with the use of a investigational product, whether or not causality is suspected. A TEAE was defined as any event emerging or manifesting at or after the initiation of treatment with an investigational product or medicinal product or any existing event that worsened in either intensity or frequency following exposure to the investigational product.

Percentage of Participants Who Developed Anti-rHuPH20 Binding Antibody Titers of >=1:160 and Neutralizing Antibodies to rHuPH20
From start of study drug administration up to end of study (up to 3.1 years)

Participants who developed anti-rHuPH20 binding antibody titers of \>=1:160 and neutralizing antibodies to rHuPH20 was reported.

Epoch 2: Serum Trough Levels of Total IgG Antibodies After Administration of TAK-771
Up to Week 31 for Participants with 4-Week Dosing Interval or Up to Week 28 for Participants with 3-Week Dosing Interval

The data was reported at Week 7, 11, 15, 19, 23, 27, and 31 for 4-Week interval and at Week 4, 7, 10, 13, 16, 19, 22, 25 and 28 for 3-Week interval.

Epoch 1: Percentage of Participants With CIDP Who Experienced Relapse
Epoch 1: Baseline up to 6 months

Relapse was defined as worsening of functional disability defined as an increase of \>=1 point relative to the pre-subcutaneous (pre-SC) treatment baseline score in adjusted Inflammatory Neuropathy Cause and Treatment (INCAT) disability score. The INCAT disability scale was the most widely used assessment tool to measure the functional activity level of participants with CIDP. The INCAT disability scale consisted of upper and lower extremity components, with a maximum of 5 points for the upper extremities (arm disability) and a maximum of 5 points for the lower extremities (leg disability), which were summed for an overall INCAT disability score ranging from 0 to 10 points, where 0 was normal and 10 was severely incapacitated. An adjusted INCAT disability score was the same as the INCAT disability score, with the only exception in the exclusion of changes from 0 (normal) to 1 (minor symptoms) (or vice versa) in upper limb function.

Epoch 1: Change From Baseline in Maximum Grip Strength in the More Affected Hand in Participants With MMN
Epoch 1: Baseline up to 6 months

The Martin Vigorimeter was used to assess grip strength in both hands. The instrument consisted of a compressible rubber ball that was connected to a manometer. When the rubber ball was squeezed, the force of compression was measured in kilopascal (kPa) ranging from 0 to 160 kPa.

Secondary Endpoints

Epoch 2: Maximum Concentration (Cmax) of Total Serum Levels of IgG and IgG Subclasses
Pre-infusion at Week 27 for participants with 4-Week or Week 25 with 3-Week dosing interval and post infusion at multiple time points up to Week 31 for participants with 4-Week dosing interval and up to Week 28 with 3-Week dosing interval.
Epoch 2: Time to Maximum Concentration (Tmax) of Total Serum Levels of IgG and IgG Subclasses (IgG1, IgG2, IgG3, and IgG4)
Pre-infusion at Week 27 for participants with 4-Week or Week 25 with 3-Week dosing interval and post infusion at multiple time points up to Week 31 for participants with 4-Week dosing interval and up to Week 28 with 3-Week dosing interval.
Epoch 2: Area Under the Curve (AUC) of Total Serum Levels of IgG and IgG Subclasses (IgG1, IgG2, IgG3, and IgG4)
Pre-infusion at Week 27 for participants with 4-Week or Week 25 with 3-Week dosing interval and post infusion at multiple time points up to Week 31 for participants with 4-Week dosing interval and up to Week 28 with 3-Week dosing interval.
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Study Design & Arms

AllocationNA
MaskingNONE
ModelSINGLE_GROUP
PurposeTREATMENT

Treatment Arms

ArmTypeDescription
TAK-771EXPERIMENTALTAK-771 includes Immune Globulin Infusion (IGI) 10% and Recombinant Human Hyaluronidase (rHuPH20). Participants will receive SC infusion of rHuPH20 solution at a dose of 80 U/g IgG first, followed by SC infusion of 10% IGI within 10 minutes of completion of the infusion of rHuPH20 solution.
Epoch 1: TAK-771 Ramp up PeriodEXPERIMENTALTAK-771 included IGI 10% and Recombinant Human Hyaluronidase (rHuPH20). Participants received subcutaneous infusion of rHuPH20 solution at a dose of 80 U/g IgG first, followed by SC infusion of 10% IGI within 10 minutes of completion of the infusion of rHuPH20 solution. The dose of 10% IGI was increased from 1/3 of full dose to full dose in 3 weeks for participants who received TAK-771 once every 3 weeks, or from 1/4 of full dose to full dose in 6 weeks for participants who received TAK-771 once every 4 weeks.
Epoch 2: TAK-771 Full Dose Treatment PeriodEXPERIMENTALTAK-771 included Immune Globulin Infusion (IGI) 10% and Recombinant Human Hyaluronidase (rHuPH20). Participants received subcutaneous infusion of rHuPH20 solution at a dose of 80 U/g IgG first, followed by SC infusion of 10% IGI within 10 minutes of completion of the infusion of rHuPH20 solution, every 3, or 4 weeks for up to Week 27 for participants with 4-Week dosing interval or Week 25 for participants with 3-Week dosing interval.
Cohort 1: TAK-771 for CIDP ParticipantsEXPERIMENTALTAK-771 includes Immune Globulin Infusion (IGI) 10% and Recombinant Human Hyaluronidase (rHuPH20). Participants will receive subcutaneous infusion of rHuPH20 solution at a dose of 80 U/g IgG first, followed by SC infusion of 10% IGI within 10 minutes of completion of the infusion of rHuPH20 solution, every 2, 3, or 4 weeks.
Cohort 2: TAK-771 for MMN ParticipantsEXPERIMENTALTAK-771 includes IGI 10% and rHuPH20. Participants will receive subcutaneous infusion of rHuPH20 solution at a dose of 80 U/g IgG first, followed by SC infusion of 10% IGI within 10 minutes of completion of the infusion of rHuPH20 solution, every 2, 3, or 4 weeks.

Interventions

NameTypeDescription
TAK-771DRUGImmune Globulin Infusion (IGI) 10% and Recombinant Human Hyaluronidase (rHuPH20)
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Eligibility Criteria

Age Range2 Years to N/A
SexALL
Healthy VolunteersNo
Study Sites9

Inclusion Criteria: 1. Participant have completed or is about to complete Study TAK-771-3004 (NCT05150340). 2. Written and/or electronic informed consent is obtained from either the participant or the participant's legally authorized representative prior to any study-related procedures and study pr...

Countries:Japan
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Recent Changes (Last 90 Days)

MEDIUMJul 25, 2026NCT05084053TRIAL_REMOVED: changed
MEDIUMJul 25, 2026NCT05084053TRIAL_REMOVED: changed
MEDIUMJul 25, 2026NCT05084053TRIAL_REMOVED: changed
MEDIUMJul 25, 2026NCT05084053TRIAL_REMOVED: changed
HIGHJun 24, 2026NCT05084053Status: ACTIVE_NOT_RECRUITING → COMPLETED
HIGHJun 24, 2026NCT05084053Status: ACTIVE_NOT_RECRUITING → COMPLETED
MEDIUMJun 19, 2026NCT05513586TRIAL_REMOVED: changed
MEDIUMJun 19, 2026NCT05513586TRIAL_REMOVED: changed
MEDIUMJun 19, 2026NCT05513586TRIAL_REMOVED: changed

Frequently asked questions about TAK-771

What is TAK-771 used for?

TAK-771 is an investigational small molecule being developed by Takeda Pharmaceutical Company Limited for Primary Immunodeficiency Diseases (PID) and Chronic Inflammatory Demyelinating Polyradiculoneuropathy (CIDP). It has also been studied in Multifocal Motor Neuropathy (MMN). The drug is in Phase 3 clinical development.

Who makes TAK-771?

TAK-771 is being developed by Takeda Pharmaceutical Company Limited, which trades under the ticker TAK. The drug is an investigational small molecule in Phase 3 clinical trials for Primary Immunodeficiency Diseases and Chronic Inflammatory Demyelinating Polyradiculoneuropathy.

What phase is TAK-771 in?

TAK-771 is in Phase 3 clinical development. It is an investigational drug and has not been approved by regulatory authorities. Three Phase 3 trials have been completed, studying the drug in Japanese participants with Primary Immunodeficiency Diseases, Chronic Inflammatory Demyelinating Polyradiculoneuropathy, and Multifocal Motor Neuropathy.

What clinical trials is TAK-771 in?

TAK-771 has completed three Phase 3 trials. NCT05084053 studied the drug in Japanese adults with CIDP and MMN. NCT05150340 studied it in Japanese people aged 2 years and older with PID. NCT05513586 evaluated long-term safety in Japanese PID participants. All trials are completed.

Is TAK-771 the same as any other drug?

No alternative names for TAK-771 have been disclosed. The drug is identified solely by its code name TAK-771 in clinical trial registrations and is being developed by Takeda Pharmaceutical Company Limited.

What is the therapeutic area of TAK-771?

TAK-771 is being developed in the therapeutic area of Neurology, with clinical studies focused on Primary Immunodeficiency Diseases and Chronic Inflammatory Demyelinating Polyradiculoneuropathy. The drug is a small molecule modality and is currently in Phase 3 development.