Efficacy, Safety, and Tolerability of Brexpiprazole (OPC-34712) as Maintenance Treatment in Adults With Schizophrenia (EQUATOR)

This study has been completed.
Sponsor:
Collaborator:
Quintiles, Inc.
Information provided by (Responsible Party):
Otsuka Pharmaceutical Development & Commercialization, Inc.
ClinicalTrials.gov Identifier:
NCT01668797
First received: August 16, 2012
Last updated: November 17, 2016
Last verified: November 2016
  Purpose
The purpose of this study is to evaluate the efficacy of brexpiprazole compared with placebo as maintenance treatment in adults with schizophrenia.

Condition Intervention Phase
Acute Schizophrenia
Drug: Brexpiprazole
Drug: Placebo
Phase 3

Study Type: Interventional
Study Design: Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Double Blind (Subject, Caregiver, Investigator, Outcomes Assessor)
Primary Purpose: Treatment
Official Title: A Phase 3, Multicenter, Randomized, Double-blind, Placebo-controlled Trial to Evaluate the Efficacy, Safety, and Tolerability of Brexpiprazole (OPC-34712) as Maintenance Treatment in Adults With Schizophrenia

Resource links provided by NLM:


Further study details as provided by Otsuka Pharmaceutical Development & Commercialization, Inc.:

Primary Outcome Measures:
  • Time From Randomization to Exacerbation of Psychotic Symptoms/Impending Relapse in Phase C. [ Time Frame: From randomization to time of exacerbation of psychotic symptoms/impending relapse - up to 52 weeks ]
    The primary efficacy variable was time to impending relapse from randomization, as assessed by Clinical Global Impression of Improvement (CGI-I) score ≥5, Positive and Negative Syndrome Scale (PANSS) scores for hostility or uncooperativeness ≥5, or ≥20% increase in PANSS Total Score. Impending relapse was defined as meeting any of the following 5 criteria: 1) CGI-I score of ≥ 5 (minimally worse) and increase in individual PANSS items to a score >4 with an absolute increase of ≥ 2 on that specific item or absolute increase of ≥ 4 on the combined 4 PANSS items (conceptual disorganization, hallucinatory behavior, suspiciousness, unusual thought content).OR 2) CGI-I score of 6 or 7 (much or very much worse) OR 3) Hospitalization due to worsening of illness OR 4) Any suicidal behavior or answers of "yes" to Questions 4 or 5 on the suicidal ideation section of the C-SSRS OR 5) Violent or aggressive behavior resulting in clinically significant injury.The measure type, number is Hazard Ratio.


Secondary Outcome Measures:
  • Percentage of Participants Meeting Exacerbation of Psychotic Symptoms/Impending Relapse Criteria in the Double-blind Maintenance Phase [ Time Frame: Baseline and Week 52/Early Termination ]
    Impending relapse was defined as meeting any of the following 5 criteria: 1) CGI-I score of ≥ 5 (minimally worse) and increase in individual PANSS items to a score > 4 with an absolute increase of ≥ 2 on that specific item or an increase on any of the following individual PANSS items (conceptual disorganization, hallucinatory behavior, suspiciousness, unusual though content) to a score of >4 and an absolute increase of ≥ 4 on the combined 4 PANSS items. OR 2) CGI-I score of 6 or 7 (much or very much worse) OR 3) Hospitalization due to worsening of illness OR 4) Current suicidal behavior as assessed by the C-SSRS (ie, an answer of "yes" to any of the questions on the suicidal behavior section of the C-SSRS 5) Violent or aggressive behavior resulting in clinically significant self-injury to another person, or property damage.


Other Outcome Measures:
  • Percentage of Participants Meeting Stability Criteria in Double Blind Maintenance Phase [ Time Frame: Weeks 6, 12, 24, 36 and 52 ]
    Participants were assessed for stability using the following criteria:1) Outpatient status AND 2) Positive and Negative Syndrome Scale (PANSS) Total Score ≤ 70 AND 3) A score of ≤ 4 (moderate) on each of the following PANSS items (possible scores of 1 to 7 for each item): conceptual disorganization, suspiciousness hallucinatory behavior, unusual thought content, AND 4) Clinical Global Impression - Severity of Illness scale(CGI-S) score ≤ 4 (moderately ill) AND 5) No current suicidal behavior as assessed by the Columbia-Suicide Severity Rating Scale (C-SSRS), defined as the following: An answer of "no" to each question on the Suicidal Behavior section of the C-SSRS AND an answer of "no" to Questions 4 and 5 on the Suicidal Ideation section of the C-SSRS, if completed, AND 6) No evidence of aggressive or violent behavior resulting in clinically significant self-injury, injury to another person, property damage.

  • Mean Change From Baseline in Positive and Negative Syndrome Scale (PANSS) Total Score - MMRM Analysis [ Time Frame: Baseline and Weeks 6, 12, 24, 36 and 52 ]
    The PANSS consisted of three subscales: a total of 30 symptom constructs. For each symptom construct, severity was rated on a 7-point scale, with a score of 1 (absence of symptoms) and a score of 7 (extremely severe symptoms). The PANSS total score was the sum of the rating scores for 7 positive scale items, 7 negative scale items, and 16 general psychopathology scale items from the PANSS panel. The PANSS total score ranged from 30 (best possible outcome) to 210 (worst possible outcome).

  • Mean Change From Baseline in PANSS Total Score - Last-observation-carried-forward (LOCF) Analysis [ Time Frame: Baseline and Weeks 6, 12, 24, 36 and 52 ]
    The PANSS consisted of three subscales: a total of 30 symptom constructs. For each symptom construct, severity was rated on a 7-point scale, with a score of 1 (absence of symptoms) and a score of 7 (extremely severe symptoms). The PANSS total score was the sum of the rating scores for 7 positive scale items, 7 negative scale items, and 16 general psychopathology scale items from the PANSS panel. The PANSS total score ranged from 30 (best possible outcome) to 210 (worst possible outcome).

  • Mean Change From Baseline in PANSS Positive Subscale Score - MMRM Analysis [ Time Frame: Baseline and Weeks 6, 12, 24, 36 and 52 ]
    PANSS consisted of three subscales: a total of 30 symptom constructs. For each construct, severity was rated on a 7-point scale, with a score of 1 (absence of symptoms) and a score of 7 (extremely severe symptoms). The PANSS positive subscale score was the sum of the rating scores for the 7 positive scale items from the PANSS panel. The 7 positive symptom constructs are delusions, conceptual disorganization, hallucinatory behavior, excitement, grandiosity, suspiciousness/persecution, and hostility. The PANSS positive subscale score ranged from 7 (best possible outcome) to 49 (worst possible outcome).

  • Mean Change From Baseline in PANSS Positive Subscale Score - LOCF Analysis [ Time Frame: Baseline and Weeks 6, 12, 24, 36 and 52 ]
    PANSS consisted of three subscales: a total of 30 symptom constructs. For each construct, severity was rated on a 7-point scale, with a score of 1 (absence of symptoms) and a score of 7 (extremely severe symptoms). The PANSS positive subscale score was the sum of the rating scores for the 7 positive scale items from the PANSS panel. The 7 positive symptom constructs are delusions, conceptual disorganization, hallucinatory behavior, excitement, grandiosity, suspiciousness/persecution, and hostility. The PANSS positive subscale score ranged from 7 (best possible outcome) to 49 (worst possible outcome).

  • Mean Change From Baseline in PANSS Negative Subscale Score - MMRM Analysis [ Time Frame: Baseline and Weeks 6, 12, 24, 36 and 52 ]
    The PANSS consisted of three subscales: a total of 30 symptom constructs. For each symptom construct, severity was rated on a 7-point scale, with a score of 1 (absence of symptoms) and a score of 7 (extremely severe symptoms). The PANSS negative subscale score was the sum of the rating scores for the 7 negative scale items from the PANSS panel. The 7 negative symptom constructs: blunted affect, emotional withdrawal, poor rapport, passive apathetic withdrawal, difficulty in abstract thinking, lack of spontaneity and flow of conversation, stereotyped thinking. The PANSS negative subscale score ranged from 7 (best possible outcome) to 49 (worst possible outcome).

  • Mean Change From Baseline in PANSS Negative Subscale Score - LOCF Analysis [ Time Frame: Baseline and Weeks 6, 12, 24, 36 and 52 ]
    The PANSS consisted of three subscales: a total of 30 symptom constructs. For each symptom construct, severity was rated on a 7-point scale, with a score of 1 (absence of symptoms) and a score of 7 (extremely severe symptoms). The PANSS negative subscale score was the sum of the rating scores for the 7 negative scale items from the PANSS panel. The 7 negative symptom constructs: blunted affect, emotional withdrawal, poor rapport, passive apathetic withdrawal, difficulty in abstract thinking, lack of spontaneity and flow of conversation, stereotyped thinking. The PANSS negative subscale score ranged from 7 (best possible outcome) to 49 (worst possible outcome).

  • Change From Baseline in Clinical Global Impression-Severity (CGI-S) Score at Endpoint - MMRM Analysis [ Time Frame: Baseline, Weeks 6, 12, 24, 36 and 52 ]
    The severity of illness for each participant was rated using the CGI-S scale. To assess CGI-S, the study physician answered the following question: "Considering your total clinical experience with this particular population, how mentally ill is the participant at this time?" Response choices included: 0 = not assessed; 1 = normal, not ill at all; 2 = borderline mentally ill; 3 = mildly ill; 4 = moderately ill; 5 = markedly ill; 6 = severely ill; and 7 = among the most extremely ill participants.

  • Change From Baseline in CGI-S Score at Endpoint - LOCF Analysis [ Time Frame: Baseline and Weeks 6, 12, 24, 36 and 52 ]
    The severity of illness for each participant was rated using the CGI-S scale. To assess CGI-S, the study physician answered the following question: "Considering your total clinical experience with this particular population, how mentally ill is the participant at this time?" Response choices included: 0 = not assessed; 1 = normal, not ill at all; 2 = borderline mentally ill; 3 = mildly ill; 4 = moderately ill; 5 = markedly ill; 6 = severely ill; and 7 = among the most extremely ill participants.

  • Clinical Global Impression - Improvement Score (CGI-I) at Endpoint - LOCF Analysis [ Time Frame: Weeks 6, 12, 24, 36 and 52 ]
    The rater or investigator would rate the participant's total improvement whether or not it is due entirely to study treatment. During Phase B, responses were compared to the participant's condition at Baseline of Phase B (for participants who entered Phase B directly after screening) or to the End of Phase A visit (for participants who participated in Phase A). During Phase C, responses were compared to the participant's condition at the End of Phase B visit. Response choices include: 0 = Not assessed, 1 = Very much improved, 2 = Much improved, 3 = Minimally improved, 4 = No change, 5 = Minimally worse, 6 = Much worse, and 7 = Very much worse.

  • Mean Change From Baseline in Personal and Social Performance (PSP) Scale Score - MMRM Analysis [ Time Frame: Baseline and Weeks 24 and 52 ]
    The PSP is a validated clinician-rated scale that measures personal and social functioning in four domains: socially useful activities (e.g., work and study), personal and social relationships, self-care, and disturbing and aggressive behaviors. Impairment in each of these domains is rated as absent, mild, manifest, marked, severe, or very severe. These ratings are then converted to a total score based on a 100-point scale using algorithms to identify the appropriate 10-point interval, and the rater's judgment to determine the total score within the 10-point interval. Participants with a PSP total score of 71 to 100 are considered to have mild functional difficulty. Scores of 31 to 70 represent manifest disabilities of various degrees and ratings of 1 to 30 indicate minimal functioning that requires intense support and/or supervision.The PSP score ranges from 0 to 100, with higher scores indicating higher levels of social functioning.

  • Mean Change From Baseline in PSP Scale Score - LOCF Analysis [ Time Frame: Baseline and Weeks 24 and 52 ]
    The PSP is a validated clinician-rated scale that measures personal and social functioning in four domains: socially useful activities (e.g., work and study), personal and social relationships, self-care, and disturbing and aggressive behaviors. Impairment in each of these domains is rated as absent, mild, manifest, marked, severe, or very severe. These ratings are then converted to a total score based on a 100-point scale using algorithms to identify the appropriate 10-point interval, and the rater's judgment to determine the total score within the 10-point interval. Participants with a PSP total score of 71 to 100 are considered to have mild functional difficulty. Scores of 31 to 70 represent manifest disabilities of various degrees and ratings of 1 to 30 indicate minimal functioning that requires intense support and/or supervision.The PSP score ranges from 0 to 100, with higher scores indicating higher levels of social functioning.

  • Mean Change From Baseline in Global Assessment of Functioning (GAF) Scale Score - MMRM Analysis [ Time Frame: Baseline and Weeks 12, 24, 36 and 52 ]
    The GAF is a clinician-rated scale that assesses the participant's psychological, social, and occupational functioning on a hypothetical continuum of mental health-illness using a scale that ranges from 1 to 100 score, where lower values indicate worst outcome. From among 10 descriptive anchors, investigators will choose the anchor which is the most representative of the participant's level of functioning at the time of the assessment and will assign a single score within the point range given for the selected anchor.

  • Mean Change From Baseline in GAF Scale Score - LOCF Analysis [ Time Frame: Baseline and Weeks 12, 24, 36 and 52 ]
    The GAF is a clinician-rated scale that assesses the participant's psychological, social, and occupational functioning on a hypothetical continuum of mental health-illness using a scale that ranges from 1 to 100 score, where lower values indicate worst outcome. From among 10 descriptive anchors, investigators will choose the anchor which is the most representative of the participant's level of functioning at the time of the assessment and will assign a single score within the point range given for the selected anchor.

  • Percentage of Participants Who Discontinued Due to All Causes [ Time Frame: Baseline to Week 52 ]
    Analysis of the percentage of participants who discontinued due to all causes was based on all participants who have been randomized and taken one dose of IMP in the Double-blind Maintenance phase. The trial was completed by sponsor when efficacy was demonstrated at the first pre-specified interim analysis (45 impending relapse events) performed by an independent (unblinded) statistician.

  • Mean Change From Baseline in PANSS Excited Component (PEC) Score - MMRM Analysis [ Time Frame: Baseline and Weeks 6, 12, 24, 36 and 52 ]
    The PEC score consisted of five PANSS items: excitement (P4), hostility (P7), tension (G4), uncooperativeness (G8), and poor impulse control (G14). Each of the items were rated on a scale of 1 (absent) to 7 (extreme). The PEC scores ranged from 5 (not present) to 35 (extremely severe).

  • Mean Change From Baseline in PEC Score - LOCF Analysis [ Time Frame: Baseline and Weeks 6, 12, 24, 36 and 52 ]
    The PEC score consisted of five PANSS items: excitement (P4), hostility (P7), tension (G4), uncooperativeness (G8), and poor impulse control (G14). Each of the items were rated on a scale of 1 (absent) to 7 (extreme). The PEC scores ranged from 5 (not present) to 35 (extremely severe).

  • Mean Change From Baseline in PANSS Marder Factor Scores: Positive Symptoms Score - MMRM Analysis [ Time Frame: Baseline and Weeks 6, 12, 24, 36 and 52 ]
    Retrospective factor analyses have been performed in recent decades using scores for the 30 individual PANSS items to categorize symptoms into 5 dimensions. Collectively, these dimensions are referred to as the PANSS Marder Factor scores and include positive symptoms score, negative symptoms score, thought score, uncontrolled hostility/excitement, anxiety depression score. The positive factor score is the sum of the 8 components of the positive symptoms scale (range: 8 - best possible outcome to 56 - worst possible outcome).

  • Mean Change From Baseline in PANSS Marder Factor Scores: Positive Symptoms Score - LOCF Analysis [ Time Frame: Baseline and Weeks 6, 12, 24, 36 and 52 ]
    Retrospective factor analyses have been performed in recent decades using scores for the 30 individual PANSS items to categorize symptoms into 5 dimensions. Collectively, these dimensions are referred to as the PANSS Marder Factor scores and include positive symptoms score, negative symptoms score, thought score, uncontrolled hostility/excitement, anxiety depression score. The positive factor score is the sum of the 8 components of the positive symptoms scale (range: 8 - best possible outcome to 56 - worst possible outcome).

  • Mean Change From Baseline in PANSS Marder Factor Scores: Negative Symptoms Score - MMRM Analysis [ Time Frame: Baseline and Weeks 6, 12, 24, 36 and 52 ]
    Retrospective factor analyses have been performed in recent decades using scores for the 30 individual PANSS items to categorize symptoms into 5 dimensions. Collectively, these dimensions are referred to as the PANSS Marder Factor scores and include positive symptoms score, negative symptoms score, thought score, uncontrolled hostility/excitement, anxiety depression score. The negative factor score is the sum of the 7 items of the negative subscale (range: 8 - best possible outcome to 56 - worst possible outcome).

  • Mean Change From Baseline in PANSS Marder Factor Scores: Negative Symptoms Score - LOCF Analysis [ Time Frame: Baseline and Weeks 6, 12, 24, 36 and 52 ]
    Retrospective factor analyses have been performed in recent decades using scores for the 30 individual PANSS items to categorize symptoms into 5 dimensions. Collectively, these dimensions are referred to as the PANSS Marder Factor scores and include positive symptoms score, negative symptoms score, thought score, uncontrolled hostility/excitement, anxiety depression score. The negative factor score is the sum of the 7 items of the negative subscale (range: 8 - best possible outcome to 56 - worst possible outcome).

  • Mean Change From Baseline in PANSS Marder Factor Scores: Disorganized Thought Score - MMRM Analysis [ Time Frame: Baseline and Weeks 6, 12, 24, 36 and 52 ]
    Retrospective factor analyses have been performed in recent decades using scores for the 30 individual PANSS items to categorize symptoms into 5 dimensions. Collectively, these dimensions are referred to as the PANSS Marder Factor scores and include positive symptoms score, negative symptoms score, thought score, uncontrolled hostility/excitement, anxiety depression score. The disorganized thoughts factor score is the sum of score from the 7 items on the disorganized thoughts subscale (range: 7 - best possible outcome to 49 - worst possible outcome).

  • Mean Change From Baseline in PANSS Marder Factor Scores: Disorganized Thought Score - LOCF Analysis [ Time Frame: Baseline and Weeks 6, 12, 24, 36 and 52 ]
    Retrospective factor analyses have been performed in recent decades using scores for the 30 individual PANSS items to categorize symptoms into 5 dimensions. Collectively, these dimensions are referred to as the PANSS Marder Factor scores and include positive symptoms score, negative symptoms score, thought score, uncontrolled hostility/excitement, anxiety depression score. The disorganized thoughts factor score is the sum of score from the 7 items on the disorganized thoughts subscale (range: 7 - best possible outcome to 49 - worst possible outcome).

  • Mean Change From Baseline in PANSS Marder Factor Scores: Uncontrolled Hostility/Excitement Score - MMRM Analysis [ Time Frame: Baseline and Weeks 6, 12, 24, 36 and 52 ]
    Retrospective factor analyses have been performed in recent decades using scores for the 30 individual PANSS items to categorize symptoms into 5 dimensions. Collectively, these dimensions are referred to as the PANSS Marder Factor scores and include positive symptoms score, negative symptoms score, thought score, uncontrolled hostility/excitement, anxiety depression score. The uncontrolled hostility/excitement factor score is the sum of score from the 4 items on the uncontrolled hostility/excitement subscale (range: 4 - best possible outcome to 28 - worst possible outcome).

  • Mean Change From Baseline in PANSS Marder Factor Scores: Uncontrolled Hostility/Excitement Score - LOCF Analysis [ Time Frame: Baseline and Weeks 6, 12, 24, 36 and 52 ]
    Retrospective factor analyses have been performed in recent decades using scores for the 30 individual PANSS items to categorize symptoms into 5 dimensions. Collectively, these dimensions are referred to as the PANSS Marder Factor scores and include positive symptoms score, negative symptoms score, thought score, uncontrolled hostility/excitement, anxiety depression score. The uncontrolled hostility/excitement factor score is the sum of score from the 4 items on the uncontrolled hostility/excitement subscale (range: 4 - best possible outcome to 28 - worst possible outcome).

  • Mean Change From Baseline in PANSS Marder Factor Scores: Anxiety/Depression Score - MMRM Analysis [ Time Frame: Baseline and Weeks 6, 12, 24, 36 and 52 ]
    Retrospective factor analyses have been performed in recent decades using scores for the 30 individual PANSS items to categorize symptoms into 5 dimensions. Collectively, these dimensions are referred to as the PANSS Marder Factor scores and include positive symptoms score, negative symptoms score, thought score, uncontrolled hostility/excitement, anxiety depression score. The anxiety/depression factor score is the sum of score from the 4 items on the anxiety/depression subscale (range: 4 - best possible outcome to 28 - worst possible outcome).

  • Mean Change From Baseline in PANSS Marder Factor Scores: Anxiety/Depression Score - LOCF Analysis [ Time Frame: Baseline and Weeks 6, 12, 24, 36 and 52 ]
    Retrospective factor analyses have been performed in recent decades using scores for the 30 individual PANSS items to categorize symptoms into 5 dimensions. Collectively, these dimensions are referred to as the PANSS Marder Factor scores and include positive symptoms score, negative symptoms score, thought score, uncontrolled hostility/excitement, anxiety depression score. The anxiety/depression factor score is the sum of score from the 4 items on the anxiety/depression subscale (range: 4 - best possible outcome to 28 - worst possible outcome).


Enrollment: 524
Study Start Date: October 2012
Study Completion Date: February 2015
Primary Completion Date: January 2015 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
Placebo Comparator: Placebo
Placebo comparator for 52 weeks
Drug: Placebo
Placebo comparator for 52 weeks
Experimental: Brexpiprazole (OPC-34712)
Brexpiprazole (OPC-34712) for 52 weeks
Drug: Brexpiprazole
Brexpiprazole tablets 1 to 4 mg /day

Detailed Description:
Schizophrenia is a severely debilitating mental illness that affects approximately 1% of the world population. Hallucinations and delusions are the most striking characteristic positive symptoms of schizophrenia; however, more subtle negative symptoms (eg, social withdrawal and lack of emotion, energy, and motivation) may also be present. The first antipsychotics developed for the treatment of schizophrenia were effective against positive symptoms, but showed little efficacy for negative symptoms and were also associated with a high incidence of side effects. Second generation antipsychotics, represent a significant advancement in the treatment of psychotic disorders because they are effective and at the same time exhibit fewer side effects than first generation antipsychotics. Although generally safer than first generation antipsychotics, the second-generation antipsychotics are not devoid of undesirable side effects such as Hyperprolactinemia and weight gain. In addition, the safety of these drugs vary considerably.
  Eligibility

Ages Eligible for Study:   18 Years to 65 Years   (Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No
Criteria

Inclusion Criteria:

  • Patients age 18 years or older to less than 65 years, inclusive (at time of informed consent)
  • Subjects with a current diagnosis of schizophrenia, as defined by DSM-IV-TR criteria and a history of the illness for at least three years prior to screening (as per subject, family, healthcare provider, or by previous medical records).
  • Subjects with a stable living environment, as demonstrated by the ability to provide contact information for themselves and/or family/friend(s)/caregiver(s).
  • Subjects who showed previous response to antipsychotic treatment in the past year.
  • Subjects who are currently treated with oral or depot antipsychotics other than clozapine or who have had a recent lapse in antipsychotic treatment requiring chronic treatment with antipsychotic medication for stabilization.
  • Subjects who are experiencing a current acute exacerbation of psychotic symptoms requiring stabilization
  • Subjects with a history of relapse and/or exacerbation of symptoms when they are not receiving antipsychotic treatment.

Exclusion Criteria:

  • Female patients who are breastfeeding or who have a positive pregnancy test (urine) result prior to receiving investigational medicinal product
  • Patients presenting a first episode of schizophrenia based on the clinical judgment of the investigator
  • Patients who are diagnosed with a disease other than schizophrenia (schizoaffective disorder, major depressive disorder, bipolar disorder, posttraumatic stress disorder, anxiety disorder, delirium, dementia, amnesia, or other cognitive disorder) based on current DSM-IV-TR Axis Ι criteria, or who are diagnosed with a personality disorder (borderline, paranoid, histrionic, schizotypal, schizoid, or antisocial)
  • Subjects experiencing acute depressive symptoms within the past 30 days
  • Subjects with schizophrenia who are considered resistant/refractory to antipsychotic treatment by history
  • Subjects with a significant risk of violent behavior; who represent a risk of committing suicide
  • Subjects with clinically significant tardive dyskinesia
  • Subjects currently treated with insulin for diabetes.
  Contacts and Locations
Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the Contacts provided below. For general information, see Learn About Clinical Studies.

Please refer to this study by its ClinicalTrials.gov identifier: NCT01668797

  Show 49 Study Locations
Sponsors and Collaborators
Otsuka Pharmaceutical Development & Commercialization, Inc.
Quintiles, Inc.
Investigators
Study Director: Aleksandar Skuban, M.D. Otsuka Pharmaceutical Development & Commercialization, Inc.
  More Information

Responsible Party: Otsuka Pharmaceutical Development & Commercialization, Inc.
ClinicalTrials.gov Identifier: NCT01668797     History of Changes
Other Study ID Numbers: 331-10-232  2011-005766-38 
Study First Received: August 16, 2012
Results First Received: January 5, 2016
Last Updated: November 17, 2016

Additional relevant MeSH terms:
Schizophrenia
Schizophrenia Spectrum and Other Psychotic Disorders
Mental Disorders
Brexpiprazole
Serotonin Agents
Neurotransmitter Agents
Molecular Mechanisms of Pharmacological Action
Physiological Effects of Drugs
Dopamine Agonists
Dopamine Agents

ClinicalTrials.gov processed this record on January 19, 2017