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Trial ยท NCT03095066

Study to Assess the Efficacy, Safety, and Tolerability of AVP-786 for the Treatment of Neurobehavioral Disinhibition Including Aggression, Agitation, and Irritability in Participants With Traumatic Brain Injury

NCT03095066, Phase 2, Completed, Otsuka Pharmaceutical Development & Commercialization, Inc.; results first posted 2025-10-29

3 sourcestrials-2026-11-12-0.5.0

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ConductScience Library. Study to Assess the Efficacy, Safety, and Tolerability of AVP-786 for the Treatment of Neurobehavioral Disinhibition Including Aggression, Agitation, and Irritability in Participants With Traumatic Brain Injury. Trials, record NCT03095066. Release trials-2026-11-12-0.5.0, 12 Nov 2026. https://conductscience.org/library/trials/NCT03095066

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Trial

As registered on ClinicalTrials.gov, in the graph's capture of the registry.

Title
Study to Assess the Efficacy, Safety, and Tolerability of AVP-786 for the Treatment of Neurobehavioral Disinhibition Including Aggression, Agitation, and Irritability in Participants With Traumatic Brain Injury
NCT number
NCT03095066
Status
Completed
Phases
Phase 2
Enrollment
168 participants, actual
Lead sponsor
Otsuka Pharmaceutical Development & Commercialization, Inc.
Conditions
Neurobehavioral Disinhibition
Interventions
Placebo, AVP-786-28, AVP-786-42.63
First posted
2017-03-29
Last updated
2025-10-29
Results first posted
2025-10-29

Source ClinicalTrials.gov

Registered outcomes10

Each outcome the trial registered, primary first, in ClinicalTrials.gov's words.

ListOutcomeTime frameDescription
Primary
Stage 1: Change From Baseline in the Composite of the Clinical Impression Severity Scores on the Neuropsychiatric Inventory Clinician Rating Scale (NPI-C) Subscale of Aggression, Agitation, and Irritability/Lability (NPI-C-3)
Baseline to Week 6
NPI-C is a retrospective informant/caregiver interview covering 12 neuropsychiatric symptom domains. These are collectively rated first by the informant/caregiver based on frequency (0-4);severity (0-3);informant/caregiver distress (0-5) \& then by the participant based on frequency (0-4), which the clinician then integrates into a (0-3) clinical impression severity rating. NPI-C-3= aggression, agitation, \& irritability/lability subscales. NPI-C agitation domain= sum of clinical impression severity scores for agitation questions 1-13 (score=0-39). NPI-C aggression domain= sum of clinician impression severity scores for aggression questions 1-8 (score=0-24). NPI-C irritability/lability domain= sum of clinician impression severity scores for irritability/lability questions 1-12 (score=0-36). NPI-C-3 composite score ranges from 0-99. Higher score= increased severity. Least square (LS) mean was analyzed using mixed effects model repeated measures (MMRM) analysis.
PrimaryStage 2: Change From Baseline in the Composite of the Clinical Impression Severity Scores on the NPI-C Subscale of NPI-C-3Week 7 to Week 12
NPI-C is a retrospective informant/caregiver interview covering 12 neuropsychiatric symptom domains. These domains are collectively rated by the informant/caregiver based on frequency (0-4), severity (0-3) \& informant/caregiver distress (0-5), then by participant based on frequency (0-4), which is integrated by clinician into (0-3) clinical impression severity rating. NPI-C-3=aggression, agitation, \& irritability/lability subscales. NPI-C agitation domain=sum of clinical impression severity scores for agitation questions 1-13 (score=0-39). NPI-C aggression domain=sum of clinician impression severity scores for aggression questions 1-8 (score=0-24). NPI-C irritability/lability domain=sum of clinician impression severity scores for irritability/lability questions 1-12 (score= 0-36). NPI-C-3 composite score ranges from 0-99. Higher score=increased severity. LS mean was analyzed using MMRM analysis. Overall number analyzed=number of participants with data available for analysis.
SecondaryStage 1 and Stage 2: Change From Baseline in NPI-C Rating Scale Subscale Scores for AggressionStage 1: Baseline to Week 6; Stage 2: Week 7 to Week 12
The NPI-C was used to rate the presence of neuropsychiatric symptoms across 12 domains. The 12 domains are collectively rated first by the informant/caregiver based on frequency (0-4), severity (0-3) \& informant/caregiver distress (0-5), then by the participant based on frequency (0-4), which the clinician then integrates into a (0-3) clinical impression severity rating. The NPI-C aggression domain score is the sum of clinician impression severity scores for aggression questions 1-8, score ranges from 0-24, where higher score indicates greater clinical severity of symptom. LS mean was analyzed using MMRM analysis. Overall number analyzed= number of participants with data available for analysis. Number analyzed= number of participants with data available for analysis at the specified time point.
SecondaryStage 1 and Stage 2: Change From Baseline in NPI-C Rating Scale Subscale Scores for AgitationStage 1: Baseline to Week 6; Stage 2: Week 7 to Week 12
The NPI-C is used to rate the presence of neuropsychiatric symptoms across 12 domains. The 12 domains are collectively rated first by the informant/caregiver based on frequency (0-4), severity (0-3) \& informant/caregiver distress (0-5), then by the participant based on frequency (0 to 4), which the clinician then integrates into a (0-3) clinical impression severity rating. The NPI-C agitation domain score is the sum of clinician impression severity scores for agitation questions 1-13, score ranges from 0-39, where higher score indicates greater clinical severity of symptom. LS mean was analyzed using MMRM analysis. Overall number analyzed=number of participants with data available for analysis. Number analyzed=number of participants with data available for analysis at the specified time point.
SecondaryStage 1 and Stage 2: Change From Baseline in NPI-C Rating Scale Subscale Scores for Irritability/LabilityStage 1: Baseline to Week 6; Stage 2: Week 7 to Week 12
NPI-C is used to rate the presence of neuropsychiatric symptoms across 12 domains. The 12 domains are collectively rated first by the informant/caregiver based on frequency (0-4), severity (0-3) \& informant/caregiver distress (0-5), then by the participant based on frequency (0 to 4), which the clinician then integrates into a (0-3) clinical impression severity rating. NPI-C irritability/lability domain score=sum of clinician impression severity scores for irritability/lability questions 1-12, score ranges from 0-36, where higher score indicates greater clinical severity of symptom. LS mean was analyzed using MMRM analysis. Overall number analyzed=number of participants with data available for analysis. Number analyzed=number of participants with data available for analysis at the specified time point.
SecondaryStage 1 and Stage 2: Change From Baseline in NPI-C Rating Scale Subscale Scores for DisinhibitionStage 1: Baseline to Week 6; Stage 2: Week 7 to Week 12
The NPI-C is used to rate the presence of neuropsychiatric symptoms across 12 domains. The 12 domains are collectively rated first by the informant/caregiver based on frequency (0-4), severity (0-3) \& informant/caregiver distress (0-5), then by the participant based on frequency (0-4), which the clinician then integrates into a (0-3) clinical impression severity rating. The NPI-C disinhibition domain score is the sum of clinical impression severity scores for disinhibition questions 1-16, score ranges from 0-48, where higher score indicates greater clinical severity of symptom. LS mean was analyzed using MMRM analysis. Overall number analyzed=number of participants with data available for analysis. Number analyzed=number of participants with data available for analysis at the specified time point.
SecondaryStage 1 and Stage 2: Change From Baseline in Modified Clinical Global Impression of Severity (mCGI-S) Scale ScoresStage 1: Baseline to Week 6; Stage 2: Week 7 to Week 12
mCGI-S is 7-point (1-7) scale requiring clinician to rate severity of participant's neurobehavioral disinhibition including aggression, agitation and irritability after NPI-C interview, at time of assessment relative to clinician's past experience with participants having same diagnosis. Considering total clinical experience, participant is assessed on severity of illness at time of rating as:0: not assessed;1: normal, not at all ill;2: borderline ill;3: mildly ill;4: moderately ill;5: markedly ill;6: severely ill;7: among most extremely ill participants. Higher score=increased severity. Negative change from baseline=improvement.LS mean was analyzed using analysis of covariance (ANCOVA) model. Overall number analyzed=participants with data available for analysis. Number analyzed=participants with data available for analysis at specified time point.
SecondaryStage 1 and Stage 2: Change From Baseline in Patient Global Impression of Severity (PGI-S) ScoresStage 1: Baseline to Week 6; Stage 2: Week 7 to Week 12
The PGI-S is a single-question scale used to assess the severity of symptoms of neurobehavioral disinhibition including aggression, agitation, and irritability, on a 7-point scale, as 1: normal, not at all ill; 2: borderline ill; 3: mildly ill; 4: moderately ill; 5: markedly ill; 6: severely ill; or 7: extremely ill. A higher score indicates worsening of the symptoms. Negative change from baseline indicates improvement. LS mean was analyzed using ANCOVA model. Overall number analyzed is the number of participants with data available for analysis. Number analyzed is the number of participants with data available for analysis at the specified time point.
SecondaryStage 1 and Stage 2: Modified Clinical Global Impression of Change (mCGI-C) Raw ScoresStage 1: Week 6; Stage 2: Week 12
The mGCI-C is a scale that requires the clinician to rate the change of the participant's neurobehavioral disinhibition including aggression, agitation, and irritability at the time of assessment after the NPI-C interview, relative to the clinician's past experience with the participant's neurobehavioral disinhibition at admission. Considering total clinical experience, a participant is assessed for change of mental illness as: 0: not assessed; 1: very much improved; 2: much improved; 3: minimally improved; 4: no change; 5: minimally worse; 6: much worse; 7: very much worse. A higher score represents worsening of symptoms. Negative change from baseline indicates improvement.
SecondaryStage 1 and Stage 2: Patient Global Impression of Change (PGI-C) Raw ScoresStage 1: Week 6; Stage 2: Week 12
The PGI-C is a 7-point (1-7) scale used to assess treatment response, and it is rated as: 1: very much improved; 2: much improved; 3: minimally improved; 4: no change; 5: minimally worse; 6: much worse; 7: very much worse. A higher score indicates worsening of the symptoms. Negative change from baseline indicates improvement. Overall number analyzed is the number of participants with data available for analysis. Number analyzed is the number of participants with data available for analysis at the specified time point.

Outcomes10

Each outcome the trial posted results for, in ClinicalTrials.gov's words.

TypeOutcomeTime framePopulationUnitsMeasured as
PRIMARY
Stage 1: Change From Baseline in the Composite of the Clinical Impression Severity Scores on the Neuropsychiatric Inventory Clinician Rating Scale (NPI-C) Subscale of Aggression, Agitation, and Irritability/Lability (NPI-C-3)
Baseline to Week 6
Modified intent-to-treat (mITT) population. Stage 1: Participants randomized in Stage 1 who took at least 1 dose of study medication \& had at least 1 post-baseline NPI-C-3 composite score efficacy assessment in Stage 1. Overall number analyzed=participants with data available for analysis.
score on a scaleLEAST_SQUARES_MEAN
PRIMARYStage 2: Change From Baseline in the Composite of the Clinical Impression Severity Scores on the NPI-C Subscale of NPI-C-3Week 7 to Week 12
mITT population. Stage 2: participants randomized into Stage 2 with at least 1 NPI-C-3 efficacy assessment in Stage 2. As pre-specified in protocol, data for placebo non-responders re-randomized into Stage 2 was used to estimate \& report Stage 2 efficacy. Hence only these Stage 2 arms are reported for the OM.
score on a scaleLEAST_SQUARES_MEAN
SECONDARYStage 1 and Stage 2: Change From Baseline in NPI-C Rating Scale Subscale Scores for AggressionStage 1: Baseline to Week 6; Stage 2: Week 7 to Week 12
mITT population. Stage 1:all participants randomized in Stage 1 who took at least 1 dose of study medication \&had at least 1 post-baseline NPI-C-3 composite score efficacy assessment in Stage 1; Stage 2:participants randomized into Stage 2 \&had at least 1 NPI-C-3 efficacy assessment in Stage 2(after Week 6). As pre-specified in protocol data for placebo non-responders re-randomized into Stage 2 was used to estimate \& report Stage 2 efficacy. Hence only these Stage 2 arms are reported for the OM.
score on a scaleLEAST_SQUARES_MEAN
SECONDARYStage 1 and Stage 2: Change From Baseline in NPI-C Rating Scale Subscale Scores for AgitationStage 1: Baseline to Week 6; Stage 2: Week 7 to Week 12
mITT population. Stage 1:all participants randomized in Stage 1 who took at least 1 dose of study medication \&had at least 1 post-baseline NPI-C-3 composite score efficacy assessment in Stage 1; Stage 2:participants randomized into Stage 2 \&had at least 1 NPI-C-3 efficacy assessment in Stage 2(after Week 6). As pre-specified in protocol data for placebo non-responders re-randomized into Stage 2 was used to estimate \& report Stage 2 efficacy. Hence only these Stage 2 arms are reported for the OM.
score on a scaleLEAST_SQUARES_MEAN
SECONDARYStage 1 and Stage 2: Change From Baseline in NPI-C Rating Scale Subscale Scores for Irritability/LabilityStage 1: Baseline to Week 6; Stage 2: Week 7 to Week 12
mITT population. Stage 1:all participants randomized in Stage 1 who took at least 1 dose of study medication \&had at least 1 post-baseline NPI-C-3 composite score efficacy assessment in Stage 1; Stage 2:participants randomized into Stage 2 \&had at least 1 NPI-C-3 efficacy assessment in Stage 2(after Week 6). As pre-specified in protocol data for placebo non-responders re-randomized into Stage 2 was used to estimate \& report Stage 2 efficacy. Hence only these Stage 2 arms are reported for the OM.
score on a scaleLEAST_SQUARES_MEAN
SECONDARYStage 1 and Stage 2: Change From Baseline in NPI-C Rating Scale Subscale Scores for DisinhibitionStage 1: Baseline to Week 6; Stage 2: Week 7 to Week 12
mITT population. Stage 1:all participants randomized in Stage 1 who took at least 1 dose of study medication \&had at least 1 post-baseline NPI-C-3 composite score efficacy assessment in Stage 1; Stage 2:participants randomized into Stage 2 \&had at least 1 NPI-C-3 efficacy assessment in Stage 2(after Week 6). As pre-specified in protocol data for placebo non-responders re-randomized into Stage 2 was used to estimate \& report Stage 2 efficacy. Hence only these Stage 2 arms are reported for the OM.
score on a scaleLEAST_SQUARES_MEAN
SECONDARYStage 1 and Stage 2: Change From Baseline in Modified Clinical Global Impression of Severity (mCGI-S) Scale ScoresStage 1: Baseline to Week 6; Stage 2: Week 7 to Week 12
mITT population. Stage 1:all participants randomized in Stage 1 who took at least 1 dose of study medication \&had at least 1 post-baseline NPI-C-3 composite score efficacy assessment in Stage 1; Stage 2:participants randomized into Stage 2 \&had at least 1 NPI-C-3 efficacy assessment in Stage 2(after Week 6). As pre-specified in protocol data for placebo non-responders re-randomized into Stage 2 was used to estimate \& report Stage 2 efficacy. Hence only these Stage 2 arms are reported for the OM.
score on a scaleLEAST_SQUARES_MEAN
SECONDARYStage 1 and Stage 2: Change From Baseline in Patient Global Impression of Severity (PGI-S) ScoresStage 1: Baseline to Week 6; Stage 2: Week 7 to Week 12
mITT population. Stage 1:all participants randomized in Stage 1 who took at least 1 dose of study medication \&had at least 1 post-baseline NPI-C-3 composite score efficacy assessment in Stage 1; Stage 2:participants randomized into Stage 2 \&had at least 1 NPI-C-3 efficacy assessment in Stage 2(after Week 6). As pre-specified in protocol data for placebo non-responders re-randomized into Stage 2 was used to estimate \& report Stage 2 efficacy. Hence only these Stage 2 arms are reported for the OM.
score on a scaleLEAST_SQUARES_MEAN
SECONDARYStage 1 and Stage 2: Modified Clinical Global Impression of Change (mCGI-C) Raw ScoresStage 1: Week 6; Stage 2: Week 12
mITT population. Stage 1:all participants randomized in Stage 1 who took at least 1 dose of study medication \&had at least 1 post-baseline NPI-C-3 composite score efficacy assessment in Stage 1; Stage 2:participants randomized into Stage 2 \&had at least 1 NPI-C-3 efficacy assessment in Stage 2(after Week 6). As pre-specified in protocol data for placebo non-responders re-randomized into Stage 2 was used to estimate \& report Stage 2 efficacy. Hence only these Stage 2 arms are reported for the OM.
score on a scaleMEAN
SECONDARYStage 1 and Stage 2: Patient Global Impression of Change (PGI-C) Raw ScoresStage 1: Week 6; Stage 2: Week 12
mITT population. Stage 1:all participants randomized in Stage 1 who took at least 1 dose of study medication \&had at least 1 post-baseline NPI-C-3 composite score efficacy assessment in Stage 1; Stage 2:participants randomized into Stage 2 \&had at least 1 NPI-C-3 efficacy assessment in Stage 2(after Week 6). As pre-specified in protocol data for placebo non-responders re-randomized into Stage 2 was used to estimate \& report Stage 2 efficacy. Hence only these Stage 2 arms are reported for the OM.
score on a scaleMEAN

Results by group36

Each measurement the trial posted, group by group, in the words and numbers it posted.

OutcomeGroupCategoryValueSpreadUnits
Stage 1: Change From Baseline in the Composite of the Clinical Impression Severity Scores on the Neuropsychiatric Inventory Clinician Rating Scale (NPI-C) Subscale of Aggression, Agitation, and Irritability/Lability (NPI-C-3)
Stage 1: Placebo-18.7Standard Error 1.74score on a scale
Stage 1: Change From Baseline in the Composite of the Clinical Impression Severity Scores on the Neuropsychiatric Inventory Clinician Rating Scale (NPI-C) Subscale of Aggression, Agitation, and Irritability/Lability (NPI-C-3)
Stage 1: AVP-786-20.4Standard Error 1.73score on a scale
Stage 2: Change From Baseline in the Composite of the Clinical Impression Severity Scores on the NPI-C Subscale of NPI-C-3Stage 1: Placebo Non-responders to Stage 2: Placebo-5.2Standard Error 4.97score on a scale
Stage 2: Change From Baseline in the Composite of the Clinical Impression Severity Scores on the NPI-C Subscale of NPI-C-3Stage 1: Placebo Non-responders to Stage 2: AVP-786-5.9Standard Error 5.28score on a scale
Stage 1 and Stage 2: Change From Baseline in NPI-C Rating Scale Subscale Scores for AggressionStage 1: PlaceboChange from Baseline to Week 6-3.6Standard Error 0.40score on a scale
Stage 1 and Stage 2: Change From Baseline in NPI-C Rating Scale Subscale Scores for AggressionStage 1: AVP-786Change from Baseline to Week 6-4.3Standard Error 0.40score on a scale
Stage 1 and Stage 2: Change From Baseline in NPI-C Rating Scale Subscale Scores for AggressionStage 1: Placebo Non-responders; to Stage 2: PlaceboChange from Week 7 to Week 12-0.8Standard Error 1.39score on a scale
Stage 1 and Stage 2: Change From Baseline in NPI-C Rating Scale Subscale Scores for AggressionStage 1: Placebo Non-responders to Stage 2: AVP-786Change from Week 7 to Week 12-0.6Standard Error 1.55score on a scale
Stage 1 and Stage 2: Change From Baseline in NPI-C Rating Scale Subscale Scores for AgitationStage 1: PlaceboChange from Baseline to Week 6-7.0Standard Error 0.69score on a scale
Stage 1 and Stage 2: Change From Baseline in NPI-C Rating Scale Subscale Scores for AgitationStage 1: AVP-786Change from Baseline to Week 6-6.7Standard Error 0.67score on a scale

Participant flow72

How many started, completed or left each group, period by period.

PeriodMilestoneGroupParticipantsUnits counted
Overall Study (Baseline to Week 12)STARTEDOverall Study: Stage 1 Placebo/Stage 2 Placebo or Stage 1 Placebo/Stage 2 AVP-78683
Overall Study (Baseline to Week 12)STARTEDOverall Study: Stage 1 AVP-786/Stage 2 AVP-78685
Overall Study (Baseline to Week 12)STARTEDStage 1: Placebo0
Overall Study (Baseline to Week 12)STARTEDStage 1: Placebo Non-responders to Stage 2: Placebo0
Overall Study (Baseline to Week 12)STARTEDStage 1: Placebo Non-responders to Stage 2: AVP-7860
Overall Study (Baseline to Week 12)STARTEDStage 1: Placebo Responders to Stage 2: Placebo0
Overall Study (Baseline to Week 12)STARTEDStage 1: Placebo Responders to Stage 2: AVP-7860
Overall Study (Baseline to Week 12)STARTEDStage 1 and 2: AVP-7860
Overall Study (Baseline to Week 12)COMPLETEDOverall Study: Stage 1 Placebo/Stage 2 Placebo or Stage 1 Placebo/Stage 2 AVP-78658
Overall Study (Baseline to Week 12)COMPLETEDOverall Study: Stage 1 AVP-786/Stage 2 AVP-78668

Adverse events8

Each adverse event the trial posted, group by group: the participants affected out of those at risk.

TypeEventOrgan systemGroupAffectedAt riskEvents
otherDizzinessNervous system disordersAll Placebo483
otherDizzinessNervous system disordersAll AVP-7867115
seriousCholecystitis acuteHepatobiliary disordersAll Placebo083
seriousCholecystitis acuteHepatobiliary disordersAll AVP-7861115
seriousEnterobacter sepsisInfections and infestationsAll Placebo083
seriousEnterobacter sepsisInfections and infestationsAll AVP-7861115
seriousSeizureNervous system disordersAll Placebo083
seriousSeizureNervous system disordersAll AVP-7861115

Adverse event totals6

The totals the trial posted for each group.

TotalGroupAffectedAt risk
Total, all-cause mortalityAll Placebo083
Total, all-cause mortalityAll AVP-7860115
Total, other adverse eventsAll Placebo483
Total, other adverse eventsAll AVP-7867115
Total, serious adverse eventsAll Placebo083
Total, serious adverse eventsAll AVP-7863115

Papers0

The papers the trial lists on ClinicalTrials.gov.

None in this release.

Grants0

The grants NIH RePORTER links to the trial, newest funded first: NIH's, and some of AHRQ's, CDC's, FDA's and VA's. Each shows its title, principal investigators, organization and funder in its newest year.

None in this release.

Trial comparisons2

Comparisons of the trial's two groups, calculated by ConductScience from the counts it posted.

ComparisonSource
All AVP-786 vs All Placebo: deaths from any causeTrial comparisons
All AVP-786 vs All Placebo: serious adverse eventsTrial comparisons

Tests0

The ConductCognition tests this trial's registered outcomes name, as ScienceGraph matched them in trial-tests-2026-11-12-0.2.1.

None in this release.

Data dates

The day each source was copied for this release.

ClinicalTrials.gov
2026-11-12
ClinicalTrials.gov
Results, from AACT
2026-03-23
AACT
NIH grant links
2026-11-13
NIH RePORTER

Sources 3

  • ClinicalTrials.gov's posted results, through CTTI's AACTFreely available. Acknowledgement requested
  • ClinicalTrials.govNo license stated
  • NIH RePORTER's clinical studies and project filesPublic domain
Each source's terms
  • ClinicalTrials.gov's posted results, through CTTI's AACTClinicalTrials.gov data via Aggregate Analysis of ClinicalTrials.gov (AACT), CTTI. CTTI makes its materials freely available and requests acknowledgement. https://aact.ctti-clinicaltrials.org/documentation/299
  • ClinicalTrials.govnone stated
  • NIH RePORTER's clinical studies and project filesPublic domain (NIH RePORTER)

ClinicalTrials.gov's data carry an international copyright outside the United States: https://clinicaltrials.gov/about-site/terms-conditions.

For software

Read this trial from software.

The record and each of its lists are JSON, twenty rows a page. No key.

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