Skip to main content
OpenTrials
Not Yet Recruiting

NCT Number: NCT05948579

Department of Defense PTSD Adaptive Platform Trial - Intervention B - Vilazodone

This is a Phase 2 randomized, double-blinded, placebo-controlled study that will evaluate multiple potential pharmacotherapeutic interventions for PTSD utilizing an adaptive platform trial design.

Intervention B - Vilazodone will assess the safety and efficacy of vilzodone in participants with PTSD.

Please see NCT05422612 for information on the S-21-02 Master Protocol.

Not Yet Recruiting

Trial opening soon.

Get Notified

Key information

Age range

18 year–65 year

Sex eligibility

All sexes

Study type

Interventional

Phase

Phase 2

About this study

The general structure of this Adaptive Platform Trial (APT) consists of a 30-day Screening Period, a 12-week Platform Treatment Period, and a 4-week Safety Follow-up. The S-21-02 Platform Trial will evaluate the safety and efficacy of multiple investigational products for the treatment of PTSD (see NCT05422612 for Master Protocol information). Participants are randomized among the multiple cohorts in the study and the resulting randomization enables sharing/pooling of control subjects, where all interventions may be compared to a common control (placebo). This record only includes information relevant to the vilazodone cohort.

Once a participant meets all eligibility criteria for the Master Protocol, eligibility for each currently enrolling intervention cohort is assessed. Eligible participants will be randomized with equal probability into a cohort. Participants randomized to the vilazodone cohort are then randomly assigned to receive either vilazodone or placebo (in a ratio of 5:3; intervention:placebo), for the duration of the 12-week treatment period.

Parties interested in having their intervention considered for testing within the M-PACT should complete a request for information form using this webpage https://citeline.qualtrics.com/jfe/form/SV_8eTQKw6TNug4z42.

Who can participate

Healthy volunteers accepted: Yes

Only the study team can determine whether someone qualifies for participation.

Inclusion criteria

No additional inclusion criteria beyond the inclusion criteria specified in the Master Protocol (NCT05422612).

Exclusion criteria

The following exclusion criteria are in addition to the exclusion criteria specified in the Master Protocol (NCT05422612).

  • History of treatment for PTSD with vilazodone at doses of 20 to 40 mg daily, for at least 4 weeks.

Treatment and study plan

Intervention B Vilazodone Hydrochloride (HCl)

Drug

Vilazodone HCl will be administered at 10 mg once daily for 7 days, followed by 20 mg for 7 days, followed by 40 mg for the remainder of the trial. There must be a minimum of 7 days between dosage increases. One reduction in dose due to tolerability will be allowed. After Week 8, dose reduction for tolerability is allowed, but dose increase is not allowed.

Intervention B Placebo

Drug

A matching placebo will be administered at 10 to 40 mg daily in the same regimen as the intervention.

Primary outcomes

  1. Absolute change in the Clinician-Administered PTSD Scale-5-Revised (CAPS-5-R) Past Month total score at Week 12 (Final/Early termination Visit).

    Time frame: 12 Weeks

    A change in PTSD symptom severity from baseline as measured by CAPS-5-R Past Month. The range of the scale is 0-200. The higher the score at baseline, the worse the PTSD severity. The larger the decrease in score from baseline, the better the outcome.

  2. Incidence of new or worsening suicidal thoughts or behaviors as measured by change in Columbia Suicide Severity Rating Scale (C-SSRS) score from baseline.

    Time frame: 12 Weeks

    The C-SSRS is an assessment of suicidal ideation and behavior in clinical and research settings. The C-SSRS consists of 16 questions that ask about suicidal ideation and behaviors (the first 10 questions comprise the ideation subscale and the last 6 comprise the behavior subscale). This 5-item subscale ranges from a minimum of 0 (corresponding to no suicidal ideation) to a maximum of 5 (representing active suicidal ideation with plan and intent).

Secondary outcomes

  1. Frequency of treatment-emergent adverse events (TEAEs).

    Time frame: 12 Weeks

    The TEAEs recorded during the study will be summarized by system organ class, preferred term, and treatment group. Adverse events and medical history will be coded using the most current version of MedDRA.

  2. Severity of treatment-emergent adverse events (TEAEs).

    Time frame: 12 Weeks

    The TEAEs recorded during the study will be summarized by system organ class, preferred term, and treatment group. Adverse events and medical history will be coded using the most current version of MedDRA.

  3. Frequency of serious adverse events (SAEs).

    Time frame: 12 Weeks

    The SAEs recorded during the study will be summarized by system organ class, preferred term, and treatment group. Adverse events and medical history will be coded using the most current version of MedDRA.

  4. Severity of serious adverse events (SAEs).

    Time frame: 12 Weeks

    The SAEs recorded during the study will be summarized by system organ class, preferred term, and treatment group. Adverse events and medical history will be coded using the most current version of MedDRA.

  5. Relative change from Baseline to Week 12 in the Clinician-Administered PTSD Scale for DSM-5 Revised (CAPS-5-R), Past Month total score.

    Time frame: 12 Weeks

    A relative change in PTSD symptom severity from baseline as measured by CAPS-5-R Past Month. The range of the scale is 0-200. The higher the score at baseline, the worse the PTSD severity. The larger the decrease in score from baseline, the better the outcome.

  6. Number of participants with a Response Rate ≥30%

    Time frame: 12 Weeks

    ≥30% reduction from Baseline to 12 Weeks in the Clinician-Administered PTSD Scale for DSM-5 Revised (CAPS-5-R), Past Month total score. The range of the scale is 0-200. The higher the score, the worse the PTSD severity. The larger the decrease in score from baseline, the better the outcome.

  7. Number of participants with a Response Rate ≥50%

    Time frame: 12 Weeks

    ≥50% reduction from Baseline to 12 Weeks in the Clinician-Administered PTSD Scale for DSM-5 Revised (CAPS-5-R), Past Month total score. The range of the scale is 0-200. The higher the score, the worse the PTSD severity. The larger the decrease in score from baseline, the better the outcome.

  8. Number of participants Achieving Remission.

    Time frame: 12 Weeks

    Achieving remission: defined as the Clinician-Administered PTSD Scale for DSM-5 Revised (CAPS-5-R), Past Month total score <18. The range of the scale is 0-200. The higher the score, the worse the PTSD severity.

Study contacts

Contact information is provided by the study sponsor or research team.

Please visit the website:

CONTACT

[email protected]

ptsdclinicaltrial.org

Sponsors and collaborators

Lead sponsor

Global Coalition for Adaptive Research

Other

Collaborators

  • Berry Consultants
  • Cambridge Cognition Ltd
  • Citeline
  • Idorsia Pharmaceuticals Ltd.
  • PPD Development, LP
  • U.S. Army Medical Research and Development Command

Registry information

Official study title

A Phase 2, Multi-center, Multi-arm, Randomized, Placebo-controlled, Double-blind, Adaptive Platform Study to Evaluate the Safety, Tolerability, and Efficacy of Potential Pharmacotherapeutic Interventions in Active-Duty Service Members, Veterans, and Non-Veteran Civilians With PTSD

Important dates

Study start
2027
Primary completion
2028
Study completion
2028
First posted
Jul 17, 2023
Registry last updated
May 20, 2026

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

Published trials that share one or more normalized conditions with this study.