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CompletedNCT04174170Updated May 30, 2025Results posted

Brexpiprazole as Combination Therapy With Sertraline in the Treatment of Adults With Post-traumatic Stress Disorder

A Phase 3 interventional study of Brexpiprazole and Sertraline in Post Traumatic Stress Disorder, sponsored by Otsuka Pharmaceutical Development & Commercialization, Inc.. Completed at 1 site in United States. Open to participants aged 18 Years to 65 Years. Per ClinicalTrials.gov, last updated 2025-05-30.

Sponsored by Otsuka Pharmaceutical Development & Commercialization, Inc. · Phase 3, Interventional, and Treatment

Phase
Phase 3
Study type
Interventional
Enrollment
591
Allocation
Randomized
Ages
18 Years to 65 Years
Sex
All
01

Study summary

This will be a 12-week, multicenter, randomized, double-blind trial evaluating the efficacy, safety, and tolerability of fixed-dose brexpiprazole + sertraline combination treatment in adult subjects with post-traumatic stress disorder.

02

Conditions studied

  • Post Traumatic Stress Disorder

Keywords

  • PTSD
03

In context

Stress Disorders, Traumatic

1,147 studies on the registry are indexed under Stress Disorders, Traumatic; 108 are open to participants now.

This study's enrollment of 591 is above the median of 60 across 908 interventional studies indexed under Stress Disorders, Traumatic.

Browse Stress Disorders, Traumatic studies →

Lead sponsor

Otsuka Pharmaceutical Development & Commercialization, Inc. is the lead sponsor of 289 studies on the registry; 18 are open to participants now.

Of its 104 completed or terminated interventional studies of FDA-regulated products, 69 (66%) have results posted.

Counted across the registry records on this site, refreshed daily.

04

Who can participate

Ages eligible
18 Years to 65 Years
Sexes eligible
All
Accepts healthy volunteers
No

Inclusion criteria

  • Male and female outpatients 18 to 65 years of age, inclusive, at the time of informed consent.
  • Participants who have post-traumatic stress disorder (PTSD), diagnosed according to Diagnostic and Statistical Manual of Mental Disorders, 5th edition (DSM-5), and confirmed by the Mini International Neuropsychiatric Interview (MINI).
  • Onset of symptoms meeting the DSM-5 criteria for PTSD symptoms for a minimum of 6 months prior to screening.

Exclusion criteria

Exclusion Criteria:

  • The index traumatic event that led to the development of PTSD took place > 9 years before screening.
  • The index traumatic event occurred before age 16.
  • Participants who have experienced a traumatic event within 3 months of screening.
  • Participants who are receiving disability payments because of PTSD or any other psychiatric disorder; unless the disability payments will not be impacted by potential improvements demonstrated in the trial.
05

Study design

Phase
Phase 3
Primary purpose
Treatment
Allocation
Randomized
Intervention model
Parallel assignment
Masking
Double (Participant, Investigator)
Enrollment
591 participants (actual)

Study arms

  • Placebo comparator
    Placebo

    All enrolled participants received brexpiprazole-matched placebo tablets and sertraline-matched placebo tablets during the 1-week placebo run-in period.

    Other: Placebo

  • Experimental
    Brexpiprazole (2 mg) + Sertraline

    Randomized participants received brexpiprazole 2 milligrams (mg), orally, once daily (QD) in combination with sertraline, 150 mg, orally, QD from Week 1 to Week 12 of the double-blind treatment (DBT) period.

    Drug: Sertraline · Drug: Brexpiprazole

  • Experimental
    Brexpiprazole (3 mg) + Sertraline

    Randomized participants received brexpiprazole 3 mg, orally, QD in combination with sertraline, 150 mg, orally, QD from Week 1 to Week 12 of the DBT period.

    Drug: Brexpiprazole · Drug: Sertraline

  • Experimental
    Sertraline + Placebo

    Randomized participants received sertraline 150 mg, orally, QD, in combination with sertraline matching placebo, orally, QD from Week 1 to Week 12 of the DBT period.

    Drug: Sertraline · Other: Placebo

Interventions

  • DrugBrexpiprazole

    3 mg pill

    Also known as: Rexulti

  • DrugSertraline

    150 mg pill

    Also known as: Zoloft

  • OtherPlacebo

    Pill

  • DrugBrexpiprazole

    2 mg pill

    Also known as: Rexulti

06

What researchers measure

Primary outcomes

  1. Change From Baseline in Clinician-Administered PTSD Scale for DSM-5 (CAPS-5) Total Score

    CAPS-5 was a structured interview designed to assess PTSD diagnostic status and symptoms severity as defined by DSM-5. CAPS -5 total score was calculated by summing severity scores for 20 DSM-5 PTSD symptoms (items 1-20) from categories: Category B: Intrusion symptoms (5 items); Category C: Avoidance symptoms (2 items); Category D: Cognition and mood symptoms (7 items); Category E: Arousal and reactivity symptoms (6 items). CAPS-5 total score was imputed by adding all subscores from categories B, C, D, E. Each symptom was scored 0=Absent to 4=Extreme/incapacitating, to yield a score range of 0-80. Higher scores indicate worse outcome. Least squares (LS) mean was determined by Mixed-effect model repeated measures (MMRM) method with fixed effect of treatment, trial site, visit week, and an interaction term of treatment by visit week, and included the interaction term of baseline values by visit week as a covariate.

    Time frame: Baseline (Week 1), Week 10

Secondary outcomes

  1. Change in Clinical Global Impression - Severity (CGI-S) Score

    The CGI-S is a standardized, clinician-administered global rating scale that measures disease severity. To assess CGI-S, the rater or investigator answered the following question: "Considering your total clinical experience with this particular population, how mentally ill is the participant at this time?" Response choices include: 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. The score 0 (not assessed) was to be set to missing. The CGI-S is therefore a 7-point scale from 1 through 7. A higher score on the CGI-S represents a higher severity of disease. LS mean was determined by MMRM method with fixed effect of treatment, trial site, visit week, and an interaction term of treatment by visit week, and included the interaction term of baseline values by visit week as a covariate.

    Time frame: Baseline (Week 1), Week 10

  2. Change in Brief Inventory of Psychosocial Functions (B-IPF) Score

    The B-IPF is a short patient-reported questionnaire consisting of 7 questions which measure PTSD-specific psychosocial function on a 7-point Likert scale (0 = not at all to 6 = very much, and a not applicable option) with a recall period of 30 days. The B-IPF measures the concepts of romantic relationships, parenting, family, friendships and socializing, work, education, and self-care. Total score ranges from 0-100 and is calculated by summing the completed scale items, dividing by the maximum possible score of all items and multiplying by 100. Higher scores indicate greater impairment. LS mean was determined by MMRM method with fixed effect of treatment, trial site, visit week, and an interaction term of treatment by visit week, and included the interaction term of baseline values by visit week as a covariate.

    Time frame: Baseline, Week 12

07

Results

Posted May 30, 2025

Participant flow

A total of 591 participants took part in the study at 75 investigative sites in the United States from 30 October 2019 to 15 August 2023.

Placebo Run-in Period
Participant flow — Placebo Run-in Period
MilestonePlaceboBrexpiprazole (2 mg) + SertralineBrexpiprazole (3 mg) + SertralineSertraline + Placebo
Started591000
Completed553000
Not completed38000
Withdrew: Not randomized38000
Double Blind Treatment Period
Participant flow — Double Blind Treatment Period
MilestonePlaceboBrexpiprazole (2 mg) + SertralineBrexpiprazole (3 mg) + SertralineSertraline + Placebo
Started0191185177
Randomized sample0191185177
Enriched randomized sample0143136138
Full analysis set (fas) enriched sample0132126130
Safety sample0185180172
Completed0126123116
Not completed0656261
Withdrew: Adverse event0998
Withdrew: Death0100
Withdrew: Lost to follow-up0221125
Withdrew: Non-compliance with study drug0442
Withdrew: Physician decision0101
Withdrew: Pregnancy0101
Withdrew: Protocol deviation0764
Withdrew: Withdrawal by subject0192914
Withdrew: Reason not specified0136

Outcome measures

PrimaryChange From Baseline in Clinician-Administered PTSD Scale for DSM-5 (CAPS-5) Total Score

CAPS-5 was a structured interview designed to assess PTSD diagnostic status and symptoms severity as defined by DSM-5. CAPS -5 total score was calculated by summing severity scores for 20 DSM-5 PTSD symptoms (items 1-20) from categories: Category B: Intrusion symptoms (5 items); Category C: Avoidance symptoms (2 items); Category D: Cognition and mood symptoms (7 items); Category E: Arousal and reactivity symptoms (6 items). CAPS-5 total score was imputed by adding all subscores from categories B, C, D, E. Each symptom was scored 0=Absent to 4=Extreme/incapacitating, to yield a score range of 0-80. Higher scores indicate worse outcome. Least squares (LS) mean was determined by Mixed-effect model repeated measures (MMRM) method with fixed effect of treatment, trial site, visit week, and an interaction term of treatment by visit week, and included the interaction term of baseline values by visit week as a covariate.

Time frame:
Baseline (Week 1), Week 10
Reported as:
Least squares mean · score on a scale
Change From Baseline in Clinician-Administered PTSD Scale for DSM-5 (CAPS-5) Total Score
score on a scaleBrexpiprazole (2 mg) + SertralineBrexpiprazole (3 mg) + SertralineSertraline + Placebo
Change From Baseline in Clinician-Administered PTSD Scale for DSM-5 (CAPS-5) Total Score-16.53 ± 1.19-18.28 ± 1.23-17.57 ± 1.19
Statistical analysis
  • Brexpiprazole (2 mg) + Sertraline vs Sertraline + Placebo · MMRM · p = 0.5165 · Treatment difference: 1.03 · 95% CI -2.09 to 4.16
  • Brexpiprazole (3 mg) + Sertraline vs Sertraline + Placebo · MMRM · p = 0.6593 · Treatment difference: -0.71 · 95% CI -3.88 to 2.46
SecondaryChange in Clinical Global Impression - Severity (CGI-S) Score

The CGI-S is a standardized, clinician-administered global rating scale that measures disease severity. To assess CGI-S, the rater or investigator answered the following question: "Considering your total clinical experience with this particular population, how mentally ill is the participant at this time?" Response choices include: 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. The score 0 (not assessed) was to be set to missing. The CGI-S is therefore a 7-point scale from 1 through 7. A higher score on the CGI-S represents a higher severity of disease. LS mean was determined by MMRM method with fixed effect of treatment, trial site, visit week, and an interaction term of treatment by visit week, and included the interaction term of baseline values by visit week as a covariate.

Time frame:
Baseline (Week 1), Week 10
Reported as:
Least squares mean · score on a scale
Change in Clinical Global Impression - Severity (CGI-S) Score
score on a scaleBrexpiprazole (2 mg) + SertralineBrexpiprazole (3 mg) + SertralineSertraline + Placebo
Change in Clinical Global Impression - Severity (CGI-S) Score-1.26 ± 0.10-1.31 ± 0.11-1.29 ± 0.10
Statistical analysis
  • Brexpiprazole (2 mg) + Sertraline vs Sertraline + Placebo · MMRM · p = 0.8215 (MMRM method with model terms: treatment, (pooled) study center, previous pharmacological treatment intervention for PTSD (yes/no), visit, treatment by visit and baseline by visit interaction.) · Treatment difference: 0.03 · 95% CI -0.25 to 0.31
  • Brexpiprazole (3 mg) + Sertraline vs Sertraline + Placebo · MMRM · p = 0.8584 (MMRM method with model terms: treatment, (pooled) study center, previous pharmacological treatment intervention for PTSD (yes/no), visit, treatment by visit and baseline by visit interaction.) · Treatment difference: -0.03 · 95% CI -0.31 to 0.26
SecondaryChange in Brief Inventory of Psychosocial Functions (B-IPF) Score

The B-IPF is a short patient-reported questionnaire consisting of 7 questions which measure PTSD-specific psychosocial function on a 7-point Likert scale (0 = not at all to 6 = very much, and a not applicable option) with a recall period of 30 days. The B-IPF measures the concepts of romantic relationships, parenting, family, friendships and socializing, work, education, and self-care. Total score ranges from 0-100 and is calculated by summing the completed scale items, dividing by the maximum possible score of all items and multiplying by 100. Higher scores indicate greater impairment. LS mean was determined by MMRM method with fixed effect of treatment, trial site, visit week, and an interaction term of treatment by visit week, and included the interaction term of baseline values by visit week as a covariate.

Time frame:
Baseline, Week 12
Reported as:
Least squares mean · score on a scale
Change in Brief Inventory of Psychosocial Functions (B-IPF) Score
score on a scaleBrexpiprazole (2 mg) + SertralineBrexpiprazole (3 mg) + SertralineSertraline + Placebo
Change in Brief Inventory of Psychosocial Functions (B-IPF) Score-27.12 ± 2.67-31.79 ± 2.86-22.96 ± 2.71
Statistical analysis
  • Brexpiprazole (2 mg) + Sertraline vs Sertraline + Placebo · MMRM · p = 0.2331 (MMRM method with model terms: treatment, (pooled) study center, previous pharmacological treatment intervention for PTSD (yes/no), visit, treatment by visit and baseline by visit interaction.) · Treatment difference: -4.16 · 95% CI -11.00 to 2.69
  • Brexpiprazole (3 mg) + Sertraline vs Sertraline + Placebo · MMRM · p = 0.0134 (MMRM method with model terms: treatment, (pooled) study center, previous pharmacological treatment intervention for PTSD (yes/no), visit, treatment by visit and baseline by visit interaction.) · Treatment difference: -8.83 · 95% CI -15.82 to -1.85

Adverse events

Collected over From the first dose of the study drug up to 21 days after the last dose (Up to Week 15). Non-serious events are listed at a 5% frequency threshold.

Adverse event summary by group
GroupDeathsSeriousOther
Brexpiprazole (2 mg) + Sertraline1/185 (0.5%)1/185 (0.5%)31/185 (16.8%)
Brexpiprazole (3 mg) + Sertraline0/180 (0%)1/180 (0.6%)35/180 (19.4%)
Sertraline + Placebo0/172 (0%)3/172 (1.7%)36/172 (20.9%)
Most frequent serious events
Most frequent serious events
EventBrexpiprazole (2 mg) + SertralineBrexpiprazole (3 mg) + SertralineSertraline + Placebo
ManiaPsychiatric disorders0/1850/1801/172
Suicidal IdeationPsychiatric disorders0/1850/1801/172
HypertensionVascular disorders0/1850/1801/172
Cyst RuptureGeneral disorders0/1851/1800/172
DrowningGeneral disorders1/1850/1800/172
Most frequent other events
Most frequent other events
EventBrexpiprazole (2 mg) + SertralineBrexpiprazole (3 mg) + SertralineSertraline + Placebo
NauseaGastrointestinal disorders9/18515/18015/172
HeadacheNervous system disorders13/18510/18013/172
DiarrhoeaGastrointestinal disorders7/18511/18011/172
InsomniaPsychiatric disorders7/1857/1809/172

Baseline characteristics

Randomized Sample included all participants randomized into this trial.

Age, Continuous
Age, Continuous(years)Brexpiprazole (2 mg) + SertralineBrexpiprazole (3 mg) + SertralineSertraline + PlaceboTotal
Mean37.1 ± 12.136.3 ± 11.737.7 ± 12.337.0 ± 12.1
Sex: Female, Male
Sex: Female, Male(Participants)Brexpiprazole (2 mg) + SertralineBrexpiprazole (3 mg) + SertralineSertraline + PlaceboTotal
Female142141126409
Male494451144
Race/Ethnicity, Customized
Race/Ethnicity, Customized(Participants)Brexpiprazole (2 mg) + SertralineBrexpiprazole (3 mg) + SertralineSertraline + PlaceboTotal
Hispanic or Latino483737122
Not Hispanic or Latino143146140429
Unknown0101
Other0101
Race/Ethnicity, Customized
Race/Ethnicity, Customized(Participants)Brexpiprazole (2 mg) + SertralineBrexpiprazole (3 mg) + SertralineSertraline + PlaceboTotal
White130124121375
Black or African American464544135
American Indian or Alaska Native3126
Asian68519
Native Hawaiian or Other Pacific Islander2103
Other46515
Clinician-Administered PTSD Scale for DSM-5 (CAPS-5) Total Score
Clinician-Administered PTSD Scale for DSM-5 (CAPS-5) Total Score(score on a scale)Brexpiprazole (2 mg) + SertralineBrexpiprazole (3 mg) + SertralineSertraline + PlaceboTotal
Mean38.8 ± 8.337.8 ± 7.339.3 ± 7.838.7 ± 7.8
Clinical Global Impression - Severity (CGI-S) Score
Clinical Global Impression - Severity (CGI-S) Score(score on a scale)Brexpiprazole (2 mg) + SertralineBrexpiprazole (3 mg) + SertralineSertraline + PlaceboTotal
Mean4.6 ± 0.74.5 ± 0.74.7 ± 0.74.6 ± 0.7
Brief Inventory of Psychosocial Functions (B-IPF) Score
Brief Inventory of Psychosocial Functions (B-IPF) Score(score on a scale)Brexpiprazole (2 mg) + SertralineBrexpiprazole (3 mg) + SertralineSertraline + PlaceboTotal
Mean63.3 ± 20.162.5 ± 22.459.9 ± 20.561.9 ± 21.0
08

Study locations

1 site
  • For additional information regarding sites, contact 844-687-8522
    New York, New York 10010, United States
09

References and documents

Study documents

  • Study protocol · Jan 4, 2023
  • Statistical analysis plan · May 24, 2023

Documents are hosted by the registry — open the source record to download them.

Individual participant data

Plan to share: Yes — Anonymized Individual participant data (IPD) that underlie the results of this study will be shared with researchers to achieve aims pre-specified in a methodologically sound research proposal. Small studies with less than 25 participants are excluded from data sharing.

Supporting information: Study protocol, Csr

10

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on May 30, 2025, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
11

Registry details

Key details

Study ID
NCT04174170
Lead sponsor
Otsuka Pharmaceutical Development & Commercialization, Inc.
Responsible party
Sponsor
First posted
Nov 22, 2019
Start date
Oct 30, 2019
Primary completion
Jul 25, 2023
Completion
Aug 15, 2023
Results posted
May 30, 2025
Last update
May 30, 2025

Oversight

Data monitoring committee
No
FDA-regulated drug
Yes
FDA-regulated device
No
View the source record on ClinicalTrials.gov ↗

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