Efficacy, Tolerability, and Pharmacokinetics of Multiple Doses of Oral TAK-831 in Adults With Friedreich Ataxia

• ClinicalTrials.gov Identifier: NCT03214588
• Recruitment Status: Completed
• First Posted: July 11, 2017
• Results First Posted: December 19, 2019
• Last Update Posted: June 14, 2021
• Sponsor: Neurocrine Biosciences
• Collaborator: Takeda
• Information provided by (Responsible Party): Neurocrine Biosciences

Tracking Information

• First Submitted Date: July 10, 2017
• First Posted Date: July 11, 2017
• Results First Submitted Date: December 2, 2019
• Results First Posted Date: December 19, 2019
• Last Update Posted Date: June 14, 2021
• Actual Study Start Date: November 8, 2017
• Actual Primary Completion Date: December 27, 2018 (Final data collection date for primary outcome measure)

Current Primary Outcome Measures (submitted: December 2, 2019)

Change From Baseline in the Inverse Time to Complete the 9-Hole Peg Test (9-HPT-1) [ Time Frame: Baseline and Week 12 ]

The 9-HPT-1 is a measure of timed upper extremity (arm and hand) function and manual dexterity. The participant picks up pegs 1 at a time (9 in total), using 1 hand only, and places them into holes on the board as quickly as possible, in any order until all holes are filled. Then, without pausing, the participant removes the pegs 1 at a time and returns them as quickly as possible. Each participant performs this task twice with each hand separately. Results on both tests are then averaged for an overall task completion time and the inverse transform is performed. A positive change from Baseline indicates improvement. Change from Baseline in 9-HPT-1 was analyzed using mixed model for repeated measures (MMRM) analysis of covariance (ANCOVA) with Baseline 9-HPT-1 as a covariate; pooled site, visit, treatment, and ambulation status (randomization factor) as fixed factors; and treatment-by-visit and Baseline 9-HPT-1-by-visit interactions.

Original Primary Outcome Measures (submitted: July 10, 2017)

Change from Baseline in Time to Complete 9-Hole Peg Test (9-HPT) at Week 12 [ Time Frame: Baseline and Week 12 ]

The 9-HPT is a measure of timed upper extremity (arm and hand) function and manual dexterity. The participant picks up pegs 1 at a time (9 in total), using 1 hand only, and places them into holes on the board as quickly as possible, in any order until all holes are filled. Then, without pausing, the participant removes the pegs 1 at a time and returns them as quickly as possible. Each participant performs this task twice with each hand separately. Results on both tests are then averaged for an overall task completion time.

Current Secondary Outcome Measures (submitted: December 2, 2019)

• Change From Baseline in the Activities of Daily Living (ADL) Component Score of the Friedreich Ataxia Rating Scale (FARS) [ Time Frame: Baseline and Weeks 2, 7 and 12 ]
  The ADL component of the FARS includes 9 subscales: speech, swallowing, cutting food and handling utensils, dressing, personal hygiene, falling, walking, quality of sitting position, and bladder function. Each of these subscales is rated on a 5-point scale where 0=normal to 4=severe disability/inability to carry out activity independently for a total possible score of 0 to 36, with higher scores representing greater disability/dependency. A negative change from Baseline indicates improvement. Change from Baseline in FARS ADL upper limb function items were analyzed using MMRM ANCOVA with Baseline FARS ADL as a covariate; pooled site, visit, treatment, and ambulation status (randomization factor) as fixed factors; and treatment-by-visit and Baseline FARS ADL-by-visit interactions.
• Change From Baseline in the Inverse Time to Complete the 9-HPT-1 [ Time Frame: Baseline and Weeks 2 and 7 ]
  The 9-HPT-1 is a measure of timed upper extremity (arm and hand) function and manual dexterity. The participant picks up pegs 1 at a time (9 in total), using 1 hand only, and places them into holes on the board as quickly as possible, in any order until all holes are filled. Then, without pausing, the participant removes the pegs 1 at a time and returns them as quickly as possible. Each participant performs this task twice with each hand separately. Results on both tests are then averaged for an overall task completion time, and the inverse transform is performed. A positive change from Baseline indicates improvement. Change from Baseline in 9-HPT-1 was analyzed using MMRM ANCOVA with Baseline 9-HPT-1 as a covariate; pooled site, visit, treatment, and ambulation status (randomization factor) as fixed factors; and treatment-by-visit and Baseline 9-HPT-1-by-visit interactions.
• Change From Baseline in the ADL Component Individual Item Scores [ Time Frame: Baseline and Weeks 2, 7 and 12 ]
  The ADL component of the FARS includes 9 subscales: speech, swallowing, cutting food and handling utensils, dressing, personal hygiene, falling, walking, quality of sitting position, and bladder function. Each of these subscales is rated on a 5-point scale where 0=normal to 4=severe disability/inability to carry out activity independently. A negative change from Baseline indicates improvement. Statistical analyses were available for the following subscales: cutting food-handling utensils, dressing and personal hygiene.
• Change From Baseline in the Modified Friedreich Ataxia Rating Scale Neurological Examination (mFARS-neuro) Total Score [ Time Frame: Baseline and Weeks 2, 7 and 12 ]
  The mFARS-neuro neurological examination is a clinician-rated measure based on neural substrates affected in Friedreich ataxia including: bulbar on a scale of 0-11, upper limb coordination on a scale of 0-36, lower limb coordination on a scale of 0-16, and upright stability/gait functions on a scale of 0-36 for a total possible score of 0 to 99 with higher scores representing greater disability. A negative change from Baseline indicates improvement. Change from Baseline in mFARS-neuro was analyzed using MMRM ANCOVA with Baseline mFARS-neuro as a covariate; pooled site, visit, treatment, and ambulation status (randomization factor) as fixed factors; and treatment-by-visit and Baseline mFARS-neuro-by-visit interactions.
• Change From Baseline in the mFARS-neuro Subscales Scores [ Time Frame: Baseline and Weeks 2, 7, and 12 ]
  The mFARS-neuro neurological examination is a clinician-rated measure based on neural substrates affected in Friedreich ataxia including: bulbar on a scale of 0-11, upper limb coordination on a scale of 0-36, lower limb coordination on a scale of 0-16, and upright stability/gait functions on a scale of 0-36, with the higher scores representing greater disability. A negative change from Baseline indicates improvement. Change from Baseline in mFARS-neuro was analyzed using MMRM ANCOVA with Baseline mFARS-neuro as a covariate; pooled site, visit, treatment, and ambulation status (randomization factor) as fixed factors; and treatment-by-visit and Baseline mFARS-neuro-by visit interactions.
• Change From Baseline in the mFARS-neuro Individual Item Scores [ Time Frame: Baseline and Weeks 2, 7, and 12 ]
  mFARS-neuro examination is a clinician-rated measure based on neural substrates affected in Friedreich ataxia individual items:Cough,Speech,Right(R)Finger to Finger Test,Left(L)Finger to Finger Test,R-Nose to Finger Test,L-Nose to Finger Test,R-Dysmetria Test,L-Dysmetria Test,Rapid Alternating Movement(RAM)of R-Hands,RAM of L-Hands,R-Finger Taps(FT),L-FT,R-Heel Along Shin Slide,L-Heel Along Shin Slide,R-Heel Along Shin Tap,L-Heel Along Shin Tap,Siting Posture,Stance Feet Apart(SFA)-3 Trial Average(TTA),SFA(Eyes Closed)-TTA,Stance Feet Together(SFT)-TTA,SFT(Eyes Closed)-TTA,Tandem Stance-TTA,Stance on Dominant Foot-TTA,Tandem Walk and Gait.Items were scored on scale of 0 to 2,3,4 or 5,with higher scores indicating greater disability.Negative change from Baseline(BL)indicates improvement.Change from BL in mFARS-neuro was analyzed using MMRM ANCOVA with BL as covariate;pooled site,visit,treatment,ambulation status as fixed factors;treatment-by-visit,BL mFARS-neuro-by visit interactions.
• Change From Baseline in the Timed 25-Foot Walk (T25FW) [ Time Frame: Baseline and Weeks 2, 7 and 12 ]
  The participant was instructed to walk 25 feet as quickly as possible, but safely. The time was calculated from the initiation of the instruction to start and ends when the participant has reached the 25-foot mark. The task was immediately administered again by having the participant walk back the same distance. The two trials were averaged. A negative change from Baseline indicates improvement. Change from Baseline in T25FW was analyzed using MMRM ANCOVA with Baseline T25FW as a covariate; pooled site, visit, treatment, and ambulation status (randomization factor) as fixed factors; and treatment-by-visit and Baseline T25FW-by-visit interactions.
• Change From Baseline in the 9-HPT and T25FW Composite Score [ Time Frame: Baseline and Weeks 2, 7, and 12 ]
  9-HPT and T25FW were evaluated together as a performance-based composite measure. The inverse transform of each score was computed. The inverse scores from each test were tabulated and converted to test-specific Z scores by subtracting the cohort mean from the raw score, and then dividing by the cohort standard deviation (SD) to create a Z score for the test. The composite Z scores were created by subtracting Z-score for T25FW from the Z-score for 9-HPT-1. A larger Z-score represents a better outcome. A positive change from Baseline indicates improvement. Change from Baseline in composite score was analyzed using MMRM ANCOVA with Baseline composite score as a covariate; pooled site, visit, treatment, and ambulation status (randomization factor) as fixed factors; and treatment-by-visit and Baseline composite score-by-visit interactions.
• Change From Baseline in Low-Contrast Letter Acuity (LCLA) Test Score [ Time Frame: Baseline and Weeks 2, 7, and, 12 ]
  The LCLA test assessed visual function in both eyes using the Low-Contrast Sloan Letter Charts at different contrast levels. The score ranged from 0 to 70, where 0=worst visual functioning and 70=best visual functioning. A positive change from Baseline indicates improvement. The change from Baseline in LCLA was analyzed using MMRM ANCOVA with Baseline LCLA as a covariate; pooled site, visit, treatment, and ambulation status (randomization factor) as fixed factors; and treatment-by-visit and Baseline LCLA-by-visit interactions.
• Number of Participants by Clinical Global Impression-Improvement (CGI-I) (Global Change) Score Categories [ Time Frame: Weeks 2, 7, and 12 ]
  The clinician used the CGI-I scale to assess the participant's improvement (or worsening) overall relative to Baseline on a 7-point scale where: 1=Much improved, 2=Moderately improved, 3=A little improved, 4=No change, 5=A little worse, 6=Moderately worse and 7=Much worse. Only those score categories reported for at least one participant at the given time-point are presented.
• Number of Participants by Patient Global Impression-Improvement (PGI-I) (Global Change) Score Categories [ Time Frame: Weeks 2, 7 and 12 ]
  The participant used the PGI-I scale to assess their improvement (or worsening) overall relative to Baseline on a 7-point scale where: 1=Much improved, 2=Moderately improved, 3=A little improved, 4=No change, 5=A little worse, 6=Moderately worse and 7=Much worse. Only those score categories reported for at least one participant at the given time-point are presented.
• Number of Participants by CGI-I (Upper Extremity Functional Change) Score Categories [ Time Frame: Weeks 2, 7, and 12 ]
  The clinician used the CGI-I scale to assess the participant's improvement (or worsening) in upper extremity function relative to Baseline on a 7-point scale where: 1=Much improved, 2=Moderately improved, 3=A little improved, 4=No change, 5=A little worse, 6=Moderately worse and 7=Much worse. Only those score categories reported for at least one participant at the given time-point are presented.
• Number of Participants by PGI-I (Upper Extremity Functional Change) Score Categories [ Time Frame: Weeks 2, 7, and 12 ]
  The participant used the PGI-I scale to assess their improvement (or worsening) in upper extremity function relative to Baseline on a 7-point scale where: 1=Much improved, 2=Moderately improved, 3=A little improved, 4=No change, 5=A little worse, 6=Moderately worse and 7=Much worse. Only those score categories reported for at least one participant at the given time-point are presented.
• Number of Participants by Clinical Global Impression-Severity (CGI-S) (Global Severity) Score Categories Relative to Baseline [ Time Frame: Baseline and Weeks 2, 7, and 12 ]
  The clinician used the CGI-S scale to assess the severity of the participant's disease overall on a 5-point scale where: 0=No symptoms, 1=Mild, 2=Moderate, 3=Severe and 4=Very severe. The number of participants by CGI-S score category is reported relative to their CGI-S score at Baseline. Only those score categories reported for at least one participant at the given time-point are presented.
• Number of Participants by Patient Global Impression-Severity (PGI-S) (Global Severity) Score Categories Relative to Baseline [ Time Frame: Baseline and Weeks 2, 7, and 12 ]
  The participant assessed the severity of their disease overall using the PGI-S 5-point scale where: 0=No symptoms, 1=Mild, 2=Moderate, 3=Severe and 4=Very severe. The number of participants by PGI-S score category is reported relative to their PGI-S score at Baseline. Only those score categories reported for at least one participant at the given time-point are presented.
• Number of Participants by CGI-S (Upper Extremity Functional Severity) Score Categories Relative to Baseline [ Time Frame: Baseline and Week 2, 7, and 12 ]
  The clinician used the CGI-S scale to assess the severity of the participant's upper extremity function on a 5-point scale where: 0=Not impaired, 1=Mildly impaired, 2=Moderately impaired, 3=Severely impaired and 4=Very severely impaired. The number of participants by CGI-S score category is reported relative to their CGI-S score at Baseline. Only those score categories reported for at least one participant at the given time-point are presented.
• Number of Participants by PGI-S (Upper Extremity Functional Severity) Score Categories [ Time Frame: Baseline and Weeks 2, 7, and 12 ]
  The participant assessed the severity of their upper extremity function using the PGI-S 5-point scale where: 0=Not impaired, 1=Mildly impaired, 2=Moderately impaired, 3=Severely impaired and 4=Very severely impaired. The number of participants by PGI-S score category is reported relative to their PGI-S score at Baseline. Only those score categories reported for at least one participant at the given time-point are presented.
• Change From Baseline in the ADL Component Score for Upper Limb Function Items of the FARS [ Time Frame: Baseline and Weeks 2, 7 and 12 ]
  The ADL component of the FARS includes 9 subscales: speech, swallowing, cutting food and handling utensils, dressing, personal hygiene, falling, walking, quality of sitting position, and bladder function. Items 3 to 5 are directly related to upper limb function. Each of these subscales is rated on a 5-point scale where 0=normal to 4=severe disability/inability to carry out activity independently for a total possible score of 0 to 12, with higher scores representing greater disability/dependency. A negative change from Baseline indicates improvement. Change from Baseline in Friedreich ataxia rating scale activities of daily living (FARS ADL) upper limb function items was analyzed using MMRM ANCOVA with Baseline FARS ADL as a covariate; pooled site, visit, treatment, and ambulation status (randomization factor) as fixed factors; and treatment-by-visit and Baseline FARS ADL-by-visit interactions.
• Number of Participants With at Least a 15 Percent (%) or at Least a 20% Reduction in 9-HPT Completion Time From Baseline [ Time Frame: Baseline up to Week 12 ]
  The 9-HPT-1 is a measure of timed upper extremity (arm and hand) function and manual dexterity. The participant picks up pegs 1 at a time (9 in total), using 1 hand only, and places them into holes on the board as quickly as possible, in any order until all holes are filled. Then, without pausing, the participant removes the pegs 1 at a time and returns them as quickly as possible. Each participant performs this task twice with each hand separately. Results on both tests are then averaged for an overall task completion time.

Original Secondary Outcome Measures (submitted: July 10, 2017)

• Change from Baseline on the Activities of Daily Living (ADL) Component of the Friedreich Ataxia Rating Scale (FARS) [ Time Frame: Baseline and Week 12 ]
  The ADL component of the FARS includes 9 subscales: speech, swallowing, cutting food and handling utensils, dressing, personal hygiene, falling, walking, quality of sitting position, and bladder function. Each of these subscales is rated on a 5-point scale where 0=normal to 4=severe disability/inability to carry out activity independently for a total possible score of 0 to 36, with higher scores representing greater disability/dependency.
• Change from Baseline on the 9-HPT [ Time Frame: Baseline and Day 2, Weeks 2 and 7 ]
  The 9-HPT is a measure of timed upper extremity (arm and hand) function and manual dexterity. The participant picks up pegs 1 at a time (9 in total), using 1 hand only, and places them into holes on the board as quickly as possible, in any order until all holes are filled. Then, without pausing, the participant removes the pegs 1 at a time and returns them as quickly as possible. Each participant performs this task twice with each hand separately. Results on both tests are then averaged for an overall task completion time.
• Change from Baseline on the ADL Individual Items [ Time Frame: Baseline and Weeks 2 and 7 ]
  The ADL component of the FARS includes 9 subscales: speech, swallowing, cutting food and handling utensils, dressing, personal hygiene, falling, walking, quality of sitting position, and bladder function. Each of these subscales is rated on a 5-point scale where 0=normal to 4=severe disability/inability to carry out activity independently.
• Change from Baseline on the Modified Friedreich Ataxia Rating Scale Neurological Examination (mFARS-neuro) Total Score [ Time Frame: Baseline and Day 2, Weeks 2, 7, and 12 ]
  The mFARS-neuro neurological examination is a clinician-rated measure based on neural substrates affected in Friedreich ataxia including: bulbar on a scale of 0-11, upper limb coordination on a scale of 0-36, lower limb coordination on a scale of 0-16, and upright stability/gait functions on a scale of 0-36 for a total possible score of 0 to 99 with higher scores representing greater disability.
• Change from Baseline on the mFARS-neuro Subscales and Individual Items [ Time Frame: Baseline and Day 2, Weeks 2, 7, and 12 ]
  The mFARS-neuro neurological examination is a clinician-rated measure based on neural substrates affected in Friedreich ataxia including: bulbar on a scale of 0-11, upper limb coordination on a scale of 0-36, lower limb coordination on a scale of 0-16, and upright stability/gait functions on a scale of 0-36, with the higher scores representing greater disability.
• Change from Baseline on the Timed 25-Foot Walk (T25FW) [ Time Frame: Baseline and Day 2, Weeks 2, 7, and 12 ]
  The participant is instructed to walk 25 feet as quickly as possible, but safely. The time is calculated from the initiation of the instruction to start and ends when the participant has reached the 25-foot mark. The task is immediately administered again by having the participant walk back the same distance.
• Change from Baseline on the 9-HPT and T25FW Composite Score [ Time Frame: Baseline and Day 2, Weeks 2, 7, and 12 ]
  9-HPT and T25FW will be evaluated together as a performance-based composite measure. The inverse transform of each score will be computed. The inverse scores from each test are tabulated and converted to test-specific Z scores by subtracting the cohort mean from the raw score, and then dividing by the cohort standard deviation (SD) to create a Z score for the test. The composite Z scores will be created by averaging the Z scores of the individual components. A larger Z-score represents a better outcome.
• Change from Baseline on Low-Contrast Letter Acuity (LCLA) Test Score [ Time Frame: Baseline and Day 2, Weeks 2, 7, and 12 ]
  The LCLA test assesses visual function in both eyes using the Low-Contrast Sloan Letter Charts at different contrast levels. The score ranges from 0 to 70, where 0=worst visual functioning and 70=best visual functioning.
• Change from Baseline on Clinical Global Impression-Improvement (CGI-I) (Global Change) [ Time Frame: Baseline and Weeks 2, 7, and 12 ]
  The clinician uses the CGI-I scale to assess the participant's improvement (or worsening) overall relative to Baseline on a 7-point scale where 1=very much improved to 7=very much worse.
• Change from Baseline on Patient Global Impression-Improvement (PGI-I) (Global Change) [ Time Frame: Baseline and Weeks 2, 7, and 12 ]
  The participant uses the PGI-I scale to assess their improvement (or worsening) overall relative to Baseline on a 7-point scale where 1=very much improved to 7=very much worse.
• Change from Baseline on CGI-I (Upper Extremity Functional Change) [ Time Frame: Baseline and Weeks 2, 7, and 12 ]
  The clinician uses the CGI-I scale to assess the participant's improvement (or worsening) in upper extremity function relative to Baseline on a 7-point scale where 1=very much improved to 7=very much worse.
• Change from Baseline on PGI-I (Upper Extremity Functional Change) [ Time Frame: Baseline and Weeks 2, 7, and 12 ]
  The participant uses the PGI-I scale to assess their improvement (or worsening) in upper extremity function relative to Baseline on a 7-point scale where 1=very much improved to 7=very much worse.
• Change from Baseline on Clinical Global Impression-Severity (CGI-S) (Global Severity) [ Time Frame: Baseline and Weeks 2, 7, and 12 ]
  The clinician uses the CGI-S scale to assess the severity of the participant's disease overall on a 7-point scale where 1=normal to 7=extremely severe.
• Change from Baseline on Patient Global Impression-Severity (PGI-S) (Global Severity) [ Time Frame: Baseline and Weeks 2, 7, and 12 ]
  The participant assesses the severity of their disease overall using the PGI-S 7-point scale where 1=normal to 7=extremely severe.
• Change from Baseline on CGI-S (Upper Extremity Functional Severity) [ Time Frame: Baseline and Weeks 2, 7, and 12 ]
  The clinician uses the CGI-S scale to assess the severity of the participant's upper extremity function on a 7-point scale where 1=normal to 7=extremely severe.
• Change from Baseline on PGI-S (Upper Extremity Functional Severity) [ Time Frame: Baseline and Weeks 2, 7, and 12 ]
  The participant assesses the severity of their upper extremity function using the PGI-S 7-point scale where 1=normal to 7=extremely severe.

• Current Other Pre-specified Outcome Measures: Not Provided
• Original Other Pre-specified Outcome Measures: Not Provided

Descriptive Information

• Brief Title: Efficacy, Tolerability, and Pharmacokinetics of Multiple Doses of Oral TAK-831 in Adults With Friedreich Ataxia
• Official Title: A Phase 2, Randomized, Double-Blind, Placebo-Controlled, Parallel-Arm Study to Evaluate Efficacy, Tolerability, and Pharmacokinetics of Multiple Doses of Oral TAK-831 in Adult Subjects With Friedreich Ataxia
• Brief Summary: The purpose of this study is to evaluate the efficacy of TAK-831 versus placebo on upper extremity (arm and hands) motor function and manual dexterity. This study will also evaluate the efficacy of TAK-831 versus placebo on activities of daily living (ADL) and other secondary assessments.

Detailed Description

The drug being tested in this study is called TAK-831. TAK-831 is being tested to treat people who have Friedreich ataxia. This study will look at upper extremity (arms and hands) motor function and manual dexterity of people who take TAK-831. Efficacy evaluations also include other neurological, functional, and patient performance assessments.

The study will enroll approximately 65 participants. Participants will be randomly assigned in a 2:1:2 ratio to one of the three treatment groups-which will remain undisclosed to the participant and study doctor during the study (unless there is an urgent medical need):

• TAK-831 High dose
• TAK-831 Low dose
• Placebo (dummy inactive pill) - this is a tablet that looks like the study drug but has no active ingredient

All participants will be asked to take three tablets of high dose, low dose, or placebo twice a day for 12 weeks.

This multi-center trial will be conducted in the United States. The overall time to participate in this study is approximately 13 weeks. Participants will make 5 visits to the clinic, and will be contacted by telephone for an exit interview no later than 7 days after their final visit or termination. Participants will also receive a safety follow-up phone call 7 to 17 days after receiving their last dose of TAK-831.

• Study Type: Interventional
• Study Phase: Phase 2
• Study Design: Allocation: Randomized; Intervention Model: Parallel Assignment; Masking: Quadruple (Participant, Care Provider, Investigator, Outcomes Assessor); Primary Purpose: Treatment
• Condition: Friedreich Ataxia

Intervention

• Drug: TAK-831
  TAK-831 tablets
• Drug: TAK-831 Placebo
  TAK-831 placebo matching tablets

Study Arms

• Placebo Comparator: Placebo
  TAK-831 placebo-matching tablets, orally, twice daily for up to 12 weeks.
  Intervention: Drug: TAK-831 Placebo
• Experimental: TAK-831 75 mg
  TAK-831 75 mg, tablets, orally, twice daily for up to 12 weeks.
  Intervention: Drug: TAK-831
• Experimental: TAK-831 300 mg
  TAK-831 300 mg, tablets, orally, twice daily for up to 12 weeks.
  Intervention: Drug: TAK-831

• Publications *: Not Provided

Recruitment Information

• Recruitment Status: Completed
• Actual Enrollment (submitted: September 28, 2018): 67
• Original Estimated Enrollment (submitted: July 10, 2017): 65
• Actual Study Completion Date: December 27, 2018
• Actual Primary Completion Date: December 27, 2018 (Final data collection date for primary outcome measure)

Eligibility Criteria

Key Inclusion Criteria:

1. Has a genetically-confirmed diagnosis (homozygous for guanine-adenine-adenine [GAA] repeat expansions in the frataxin gene [FXN] in the affected range of Friedreich ataxia [FRDA] or a compound heterozygous expansion with a point mutation or deletion), with an established disease stage of 2 to 5, inclusive, as determined by the Functional Staging for Ataxia, at Screening.

Key Exclusion Criteria:

1. Received a diagnosis of ataxic syndromes other than FRDA.
2. Has a history of cancer, except basal cell carcinoma or in situ cervical cancer that has been in remission for greater than or equal to (>=5) years prior to first dose of study drug.
3. Known to be currently infected or has been infected with human immunodeficiency virus (HIV), hepatitis B virus, or hepatitis C virus.
4. Has a known hypersensitivity to any component of the formulation of TAK-831.
5. Has a history of drug abuse (defined as any illicit drug use) or a history of alcohol abuse.
6. Has taken any excluded medication, or has had insufficient washout of medications or is unable or unwilling to discontinue medications as required by the protocol.
7. If male, the participant intends to donate sperm during the course of this study or for 95 days after the last dose of study drug.
8. If female, the participant is of childbearing potential and lactating, pregnant (positive prerandomization serum pregnancy test), or plans to become pregnant before participating in the study, during the study, or within 35 days after last dose of the study drug, or intending to donate ova during such time period.
9. Has a history of neuroleptic malignant syndrome, water intoxication, or paralytic ileus or other conditions that may interfere with absorption of study medication.

Sex/Gender

• Sexes Eligible for Study: All

• Ages: 18 Years to 55 Years (Adult)
• Accepts Healthy Volunteers: No
• Contacts: Contact information is only displayed when the study is recruiting subjects
• Listed Location Countries: United States

Administrative Information

• NCT Number: NCT03214588
• Other Study ID Numbers: TAK-831-1501; U1111-1189-7951 ( Registry Identifier: WHO )
• Has Data Monitoring Committee: Yes

U.S. FDA-regulated Product

• Studies a U.S. FDA-regulated Drug Product: Yes
• Studies a U.S. FDA-regulated Device Product: No

IPD Sharing Statement

• Plan to Share IPD: No

• Current Responsible Party: Neurocrine Biosciences
• Original Responsible Party: Takeda
• Current Study Sponsor: Neurocrine Biosciences
• Original Study Sponsor: Takeda
• Collaborators: Takeda
• Investigators: Not Provided
• PRS Account: Neurocrine Biosciences
• Verification Date: June 2021