Initial Study Sesting Efficacy and Tolerability of PT150 for PTSD in Veterans

NCT ID: NCT07187011

Last Updated: 2025-12-23

Study Results

Results pending

The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.

Basic Information

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Recruitment Status

NOT_YET_RECRUITING

Clinical Phase

PHASE2

Total Enrollment

120 participants

Study Classification

INTERVENTIONAL

Study Start Date

2026-04-01

Study Completion Date

2029-05-01

Brief Summary

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The purpose of this study is to test the drug PT150, which blocks glucocorticoid receptor (GR) signaling, for treatment of PTSD in Veterans, and establish a safety and efficacy profile that will inform the design of future studies.

Detailed Description

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This is a dual-site, proof-of-concept, parallel arm, double-blind placebo control study of a 14-day single daily dose of PT150/placebo in 100 Veterans with PTSD. Each site will enroll 60 Veterans with PTSD to ensure 100 study completers. Preclinical studies of PT150 and similar types of glucocorticoid antagonists have shown that they block stress responses in both acute and chronic models of stress response. PT150 has been tested previously in healthy control populations and in populations with depression, with it being found to be well tolerated and safe. Drug interaction results suggest it does not interact with alcohol or serotonin reuptake inhibitors, again supporting its safety and making it a candidate for further development. The goal of this Phase2a study is to tests its efficacy to reduce PTSD symptoms, as well as other biomarkers associated with PTSD. Participants first will undergo screening procedures, including a medical exam, clinical interview, self-report questionnaires, and blood draw. If eligible, they will be randomized to either PT150 or placebo. The PT150 dose will be titrated from 150-600mg over days 1-7, with the max dose of 900mg/day given the remaining 7 day timeframe. The same procedures will be repeated before, during and after taking the study drug or placebo for fourteen days. The key outcome measures will be obtained at baseline, day 28, and day 84.

Conditions

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PTSD - Post Traumatic Stress Disorder

Keywords

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cortisol trauma veteran PT150 glucocorticoid

Study Design

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Allocation Method

RANDOMIZED

Intervention Model

PARALLEL

Intervention model: The investigators propose a two-site parallel group, randomized, double-blind, placebo-controlled Phase IIa clinical trial to test the efficacy and safety of PT 150-900 mg daily for 14 days for PTSD symptoms in Veterans.
Primary Study Purpose

TREATMENT

Blinding Strategy

QUADRUPLE

Participants Caregivers Investigators Outcome Assessors

Study Groups

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PT150

150-900 mg study drug dose titrated over 7 days

Group Type EXPERIMENTAL

PT150

Intervention Type DRUG

Glucorticoid antagonist 900 mg

Placebo

Placebo

Group Type PLACEBO_COMPARATOR

Placebo

Intervention Type DRUG

900 mg

Interventions

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PT150

Glucorticoid antagonist 900 mg

Intervention Type DRUG

Placebo

900 mg

Intervention Type DRUG

Eligibility Criteria

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Inclusion Criteria

* Provide signed and dated informed consent form
* Be a military service member or Veteran
* Male or female, 18-65 years of age
* Meet DSM-5 criteria for PTSD ≥ 3 months duration as determined by CAPS-5
* Normal vitals and a baseline EKG with clinically normal sinus rhythm, clinically normal conduction, normal QTc, and no clinically significant arrhythmias
* Self-reported medical history and brief physical examination with no clinically significant contraindications for study participation
* Blood laboratory test results for routine hematology, chemistries, liver and kidney function tests within acceptable limits
* Willing to comply with all study procedures including taking oral medication, the study schedule and be available for the duration of the study Biological females, if able to conceive, must agree to use 2 forms of non-hormonal, medically acceptable contraception.

Exclusion Criteria

* Severe alcohol or substance use disorders by DSM-5 criteria in past 3 months or positive urine test for substances other than cannabis
* History or diagnosis of neurodegenerative disorders, psychotic disorders or bipolar disorder. Current treatment with antipsychotic medication for mental health
* History of suicide attempts and/or current suicidal ideation with plan or intent
* Currently using psychotropic medication (except SSRI/SNRI) or other drugs or agents which might interact with study drug. Currently taking SSRI/SNRI antidepressants for less than 30 days. Benzodiazepines or sleep agents (e.g. eszopiclone; zolpidem) are excluded; exception: trazodone 25-50 mg qhs prn for sleep or prazosin for nightmares
* Be pregnant or nursing
* HRT dose not stable for a minimum of 3 months
* Evidence of a serious, chronic medical condition that would increase the risk of an adverse outcome or history of any serious metabolic or other disease known to affect the CNS
* Have evidence of untreated or unstable medical illness including cardiovascular, neuroendocrine, autoimmune, renal, hepatic, or active HIV+/AIDS infection
* Serious cognitive impairment likely to interfere with ability to meaningfully participate
* Past brain injury/head trauma with minor loss of consciousness and current symptoms or significant loss of consciousness
* Current signs of violence or aggression
* A history of adrenal insufficiency or a plasma cortisol level ≤ 5 mcg/dl at screening
* Receiving non-pharmacotherapy treatments or procedures for where precautions exist for taking with PT150 and/or those that might interfere with the study
* Contraindication(s) to take PT150 such as renal or hepatic impairment, congenital metabolic disorders, or hypersensitivity to study drug or similar compounds
* Participation in a pharmaceutical trial or use of investigational drugs within 1 month of screening
* Hearing loss that would interfere with the extinction recall measures
* Any other illness, condition, or use of medications which in the opinion of the PI and/or study investigator would preclude safe and/or successful completion of the study
Minimum Eligible Age

18 Years

Maximum Eligible Age

65 Years

Eligible Sex

ALL

Accepts Healthy Volunteers

No

Sponsors

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United States Department of Defense

FED

Sponsor Role collaborator

Pop Test Oncology LLC

INDUSTRY

Sponsor Role collaborator

San Diego Veterans Healthcare System

FED

Sponsor Role lead

Responsible Party

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Victoria Risbrough

VA Research Career Scientist/Health Science Research Specialist/Professor of Psychiatry

Responsibility Role PRINCIPAL_INVESTIGATOR

Principal Investigators

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Victoria Risbrough, PhD

Role: PRINCIPAL_INVESTIGATOR

San Diego VA Healthcare System

Locations

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Jennifer Moreno Department of VA Medical Center

San Diego, California, United States

Site Status

Michael E DeBakey VA Medical Center

Houston, Texas, United States

Site Status

Countries

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United States

Central Contacts

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Giovanni Castillo, BS

Role: CONTACT

Phone: 858-552-8585

Email: [email protected]

Erin Natale, MS

Role: CONTACT

Phone: 858-552-8585

Email: [email protected]

Other Identifiers

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HT94252510832

Identifier Type: OTHER_GRANT

Identifier Source: secondary_id

H250195

Identifier Type: -

Identifier Source: org_study_id