An Evaluation of the Safety and Efficacy of TSND-201 for the Treatment of PTSD (EMPOWER-1) (EMPOWER-1)

September 14, 2026 updated by: Transcend Therapeutics

A Phase 3, Randomized, Double-Blind, Placebo-Controlled, Evaluation of the Safety and Efficacy of TSND-201 for the Treatment of PTSD

This study is evaluating the safety and efficacy of TSND-201 in adults with PTSD.

Eligible participants will enter a 4-week Treatment Period where they will be randomized 1:1:1 to receive one of two doses of TSND-201 or placebo, once per week. Following the Treatment Period, participants will enter an 8-week Follow-up Period.

Study Overview

Status

Status

Indicates the current recruitment status or the expanded access status.
Recruiting

Conditions

Conditions

The disease, disorder, syndrome, illness, or injury that is being studied. On ClinicalTrials.gov, conditions may also include other health-related issues, such as lifespan, quality of life, and health risks.

Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.

Study Type

Study Type

Describes the nature of a clinical study. Study types include interventional studies (also called clinical trials), observational studies (including patient registries), and expanded access.
Interventional

Enrollment (Estimated)

Enrollment

The number of participants in a clinical study. The "anticipated" enrollment is the target number of participants that the researchers need for the study.
300

Phase

Phase

The stage of a clinical trial studying a drug or biological product, based on definitions developed by the U.S. Food and Drug Administration (FDA). The phase is based on the study's objective, the number of participants, and other characteristics. There are five phases: Early Phase 1 (formerly listed as Phase 0), Phase 1, Phase 2, Phase 3, and Phase 4. Not Applicable is used to describe trials without FDA-defined phases, including trials of devices or behavioral interventions.
  • Phase 3

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Contact

Study Contact

The name and contact information for the person who can answer enrollment questions for a clinical study. Each location where the study is being conducted may also have a specific contact, who may be better able to answer those questions.

Study Locations

  • United States
    • Arizona
      • Phoenix, Arizona, United States, 85050
      • Tucson, Arizona, United States, 85715
        • Recruiting
        • Del Sol Research
        • Contact:
    • Arkansas
      • Little Rock, Arkansas, United States, 72211
        • Recruiting
        • Preferred Research Partners
        • Contact:
          • Study Coordinator
          • Phone Number: 501-553-9987
    • California
      • Imperial, California, United States, 92251
        • Recruiting
        • Sun Valley Research
        • Contact:
      • La Jolla, California, United States, 92037
        • Recruiting
        • Kadima Neuropsychiatry
        • Contact:
          • David Feifel, MD, PhD
          • Phone Number: (858) 412- 4130
      • Los Angeles, California, United States, 90025
        • Recruiting
        • CalNeuro Research Group
        • Contact:
      • Montclair, California, United States, 91763
      • Oceanside, California, United States, 92056
      • Orange, California, United States, 92866
        • Recruiting
        • ATP Clinical Research
        • Contact:
          • Bobby Shih, Site Manager
          • Phone Number: 949-354-5353
          • Email: bshih@atpcr.com
        • Contact:
          • Careline Lunter, Recruitment Coordinator
          • Phone Number: 949-354-5353
          • Email: caralinel@pnsoc.com
      • San Juan Capistrano, California, United States, 92675
    • Colorado
      • Evergreen, Colorado, United States, 80439
    • Florida
      • Jacksonville, Florida, United States, 32256
        • Recruiting
        • CNS Healthcare
        • Contact:
          • Study Coordinator
          • Phone Number: 904-281-5757
      • Lauderhill, Florida, United States, 33319
      • Maitland, Florida, United States, 32751
      • Orlando, Florida, United States, 32801
    • Georgia
    • Illinois
    • Louisiana
      • New Orleans, Louisiana, United States, 70115
        • Recruiting
        • DelRicht - New Orleans
        • Contact:
          • Anne Wright
          • Phone Number: 504-336-2667
    • Maryland
      • Pikesville, Maryland, United States, 21208
    • Massachusetts
      • Worcester, Massachusetts, United States, 01608
    • Missouri
      • Creve Coeur, Missouri, United States, 63141
      • Saint Charles, Missouri, United States, 63304
    • New Jersey
      • Cherry Hill, New Jersey, United States, 08002
        • Recruiting
        • Center for Emotional Fitness/ Lumina Clinical Research Center
        • Contact:
      • Princeton, New Jersey, United States, 08540
        • Recruiting
        • Global Medical Institutes
        • Contact:
      • Toms River, New Jersey, United States, 08755
        • Recruiting
        • Bio Behavioral Health
        • Contact:
    • New York
      • New York, New York, United States, 10128
    • Ohio
      • Independence, Ohio, United States, 44131
        • Recruiting
        • Insight Clinical Trials
        • Contact:
          • Elisa Poggi
          • Phone Number: 216-526-1843
    • Pennsylvania
      • Plymouth Meeting, Pennsylvania, United States, 19462
        • Recruiting
        • Flourish Research
        • Contact:
          • Landon Este
          • Phone Number: 610-277-8073
      • West Chester, Pennsylvania, United States, 19380
        • Recruiting
        • Suburban Research Associates
        • Contact:
    • Tennessee
      • Memphis, Tennessee, United States, 38119
    • Texas
      • Austin, Texas, United States, 78737
        • Recruiting
        • Austin Clinical Trial Partners
        • Contact:
          • Kara Chilek
          • Phone Number: 512-521-0595
      • El Paso, Texas, United States, 79902
        • Recruiting
        • Haracec Clinical Research
        • Contact:
      • Houston, Texas, United States, 77058
    • Utah
    • Washington
      • Seattle, Washington, United States, 98104
        • Recruiting
        • Seattle Neuropsychiatric Treatment Center (NTC)
        • Contact:
    • Wisconsin
      • Madison, Wisconsin, United States, 53706
        • Recruiting
        • Wisconsin-Madison
        • Contact:

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Eligibility Criteria

The key requirements that people who want to participate in a clinical study must meet or the characteristics they must have. Eligibility criteria consist of both inclusion criteria (which are required for a person to participate in the study) and exclusion criteria (which prevent a person from participating). Types of eligibility criteria include whether a study accepts healthy volunteers, has age or age group requirements, or is limited by sex.

Ages Eligible for Study

  • Adult
  • Older Adult

Accepts Healthy Volunteers

No

Description

Inclusion Criteria:

  • Meets the DSM-5 criteria for current PTSD diagnosis, with a symptom duration of at least 6 months.
  • Tried at least one pharmacological treatment for PTSD or trauma-focused psychotherapy.
  • Proficient in communication (verbal and reading) to complete interviews and written questionnaires.
  • Free from any other clinically significant illness or disease.

Exclusion Criteria:

  • Primary diagnosis of any other DSM-5 disorder.
  • Body mass index (BMI) <18 kg/m2 or ≥40 kg/m2.
  • Unable to refrain from nicotine use for at least 8 hours.
  • Use of prohibited concomitant medications or therapies.
  • Current or previous history of clinically significant cardiovascular (including current uncontrolled hypertension) / cerebrovascular conditions.

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Treatment
  • Allocation: Randomized
  • Interventional Model: Parallel Assignment
  • Masking: Quadruple

Arms and Interventions

Participant Group / Arm

Participant Group / Arm

A group or subgroup of participants in a clinical trial that receives a specific intervention/treatment, or no intervention, according to the trial's protocol.
Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.
Placebo Comparator: Placebo
Drug: Placebo
Placebo capsules, given orally, once a week for four consecutive weeks
Experimental: TSND-201, Dose Level 1
Drug: TSND-201
TSND-201 capsules, given orally, once a week for four consecutive weeks
Other Names:
  • methylone
Experimental: TSND-201, Dose Level 2
Drug: TSND-201
TSND-201 capsules, given orally, once a week for four consecutive weeks
Other Names:
  • methylone

What is the study measuring?

Primary Outcome Measures

Primary Outcome Measures

In a clinical study's protocol, the planned outcome measure that is the most important for evaluating the effect of an intervention/treatment. Most clinical studies have one primary outcome measure, but some have more than one.
Outcome Measure
Measure Description
Time Frame
Change from Baseline in Clinician-Administered PTSD Scale for DSM-5 (CAPS-5) Total Severity Score
Time Frame: Up to 12 weeks
CAPS-5 is a structured interview designed to assess PTSD symptoms severity. The total severity score ranges from 0 to 80, with a higher score indicating more severe symptoms.
Up to 12 weeks

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Sponsor

The organization or person who initiates the study and who has authority and control over the study.
Transcend Therapeutics

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Actual)

Study Start

The actual date on which the first participant was enrolled in a clinical study. The "anticipated" study start date is the date that the researchers think will be the study start date.
April 2, 2026

Primary Completion (Estimated)

Primary Completion

The date on which the last participant in a clinical study was examined or received an intervention to collect final data for the primary outcome measure. Whether the clinical study ended according to the protocol or was terminated does not affect this date. For clinical studies with more than one primary outcome measure with different completion dates, this term refers to the date on which data collection is completed for all the primary outcome measures. The "anticipated" primary completion date is the date that the researchers think will be the primary completion date for the study.
December 1, 2027

Study Completion (Estimated)

Study Completion

The date on which the last participant in a clinical study was examined or received an intervention/treatment to collect final data for the primary outcome measures, secondary outcome measures, and adverse events (that is, the last participant's last visit). The "anticipated" study completion date is the date that the researchers think will be the study completion date.
December 1, 2027

Study Registration Dates

First Submitted

First Submitted

The date on which the study sponsor or investigator first submitted a study record to ClinicalTrials.gov. There is typically a delay of a few days between the first submitted date and the record's availability on ClinicalTrials.gov (the first posted date).
March 2, 2026

First Submitted That Met QC Criteria

First Submitted That Met QC Criteria

The date on which the study sponsor or investigator first submits a study record that is consistent with National Library of Medicine (NLM) quality control (QC) review criteria. The sponsor or investigator may need to revise and submit a study record one or more times before NLM's QC review criteria are met. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
March 2, 2026

First Posted (Actual)

First Posted

The date on which the study record was first available on ClinicalTrials.gov after National Library of Medicine (NLM) quality control (QC) review has concluded. There is typically a delay of a few days between the date the study sponsor or investigator submitted the study record and the first posted date.
March 6, 2026

Study Record Updates

Last Update Posted (Actual)

Last Update Posted

The most recent date on which changes to a study record were made available on ClinicalTrials.gov. There may be a delay between when the changes were submitted to ClinicalTrials.gov by the study's sponsor or investigator (the last update submitted date) and the last update posted date.
September 17, 2026

Last Update Submitted That Met QC Criteria

Last Update Submitted That Met QC Criteria

The most recent date on which the study sponsor or investigator submitted changes to a study record that are consistent with National Library of Medicine (NLM) quality control (QC) review criteria. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
September 14, 2026

Last Verified

Last Verified

The most recent date on which the study sponsor or investigator confirmed the information about a clinical study on ClinicalTrials.gov as accurate and current. If a study with a recruitment status of recruiting; not yet recruiting; or active, not recruiting has not been confirmed within the past 2 years, the study's recruitment status is shown as unknown.
May 1, 2026

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

Other Study ID Numbers

Identifiers or ID numbers other than the NCT number that are assigned to a clinical study by the study's sponsor, funders, or others. These numbers may include unique identifiers from other trial registries and National Institutes of Health grant numbers.
  • TSND201-PTSD-301

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

NO

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

Yes

Studies a U.S. FDA-regulated device product

No

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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