Fasedienol Nasal Spray for the Acute Treatment of Anxiety in Adults With Social Anxiety Disorder (PALISADE-4) (PALISADE-4)

May 20, 2026 updated by: VistaGen Therapeutics, Inc.

US, Phase 3, Multicenter, Randomized, Double-blind, Placebo-controlled Clinical Trial of Fasedienol Nasal Spray for the Acute Treatment of Anxiety Induced by a Public Speaking Challenge in Adult Subjects With Social Anxiety Disorder, With an Open-Label Extension (PALISADE-4)

This U.S. Phase 3 clinical trial is designed to evaluate the efficacy, safety, and tolerability of the acute intranasal (i.n.) administration of Fasedienol Nasal Spray (fasedienol) (3.2 µg) to relieve symptoms of acute anxiety in adult subjects ages 18 through 65 with Social Anxiety Disorder induced by a public speaking challenge (PSC) in a clinical setting. In addition, safety and tolerability of i.n. administration of 3.2 µg of fasedienol, as-needed, up to 6 times per day for up to 12 months, will be assessed in those subjects who complete PALISADE-4 and choose to enter the distinct open-label extension phase of the study.

Study Overview

Status

Status

Indicates the current recruitment status or the expanded access status.
Active, not 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 (Actual)

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.
238

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, 85012
        • Vistagen Clinical Site
    • Arkansas
      • Little Rock, Arkansas, United States, 72211
        • Vistagen Clinical Site
    • California
      • Bellflower, California, United States, 90706
        • Vistagen Clinical Site
      • Oceanside, California, United States, 92056
        • Vistagen Clinical Site
      • Orange, California, United States, 92868
        • Vistagen Clinical Site
      • Redlands, California, United States, 92374
        • Vistagen Clinical Site
      • Torrance, California, United States, 90504
        • Vistagen Clinical Site
    • Colorado
      • Denver, Colorado, United States, 80209
        • Vistagen Clinical Site
    • Florida
      • Tampa, Florida, United States, 33629
        • Vistagen Clinical Site
    • Georgia
      • Decatur, Georgia, United States, 30030
        • Vistagen Clinical Site
    • Illinois
      • Chicago, Illinois, United States, 60640
        • Vistagen Clinical Site
      • Naperville, Illinois, United States, 60563
        • Vistagen Clinical Site
    • Massachusetts
      • Boston, Massachusetts, United States, 02131
        • Vistagen Clinical Site
    • Michigan
      • Bloomfield Township, Michigan, United States, 48302
        • Vistagen Clinical Site
    • Mississippi
      • Flowood, Mississippi, United States, 39232
        • Vistagen Clinical Site
    • Nevada
      • Las Vegas, Nevada, United States, 89119
        • Vistagen Clinical Site
      • Las Vegas, Nevada, United States, 89121
        • Vistagen Clinical Site
    • New Mexico
      • Albuquerque, New Mexico, United States, 87109
        • Vistagen Clinical Site
    • New York
      • New York, New York, United States, 10128
        • Vistagen Clinical Site
    • Ohio
      • Cincinnati, Ohio, United States, 45229
        • Vistagen Clinical Site
    • Texas
      • Austin, Texas, United States, 78737
        • Vistagen Clinical Site
      • Austin, Texas, United States, 78759
        • Vistagen Clinical Site
      • Dallas, Texas, United States, 75251
        • Vistagen Clinical Site
      • Houston, Texas, United States, 77055
        • Vistagen Clinical Site
      • San Antonio, Texas, United States, 78229
        • Vistagen Clinical Site
    • Washington
      • Everett, Washington, United States, 98201
        • Vistagen Clinical Site

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:

  • Written informed consent provided prior to conducting any study-specific assessment.
  • Male and female adults, 18 through 65 years of age, inclusive.
  • Current diagnosis of SAD as defined in the Diagnostic and Statistical Manual of Mental Disorders, 5th Edition, and confirmed by the Mini-International Neuropsychiatric Interview (MINI).
  • Clinician-rated Liebowitz Social Anxiety Score (LSAS) total score ≥70 at Screening (Visit 1).
  • Clinician-rated Hamilton Depression Rating Scale (HAM-D) (17-items) total score <16.
  • Female subjects of childbearing potential must be able to commit to the consistent and correct use of an effective method of birth control throughout the study
  • Subjects must have normal olfactory function

Exclusion Criteria:

  • Any history of bipolar disorder (I or II), schizophrenia, schizoaffective disorder, psychosis, anorexia or bulimia, premenstrual dysphoric disorder, autism spectrum disorder, or obsessive-compulsive disorder.
  • Any other current principal or personality disorder (previously known as Axis I or Axis II disorders), except for specific phobias or generalized anxiety disorder, provided that these are not the primary diagnosis.
  • Subjects who meet criteria for moderate or severe alcohol use disorder within the 1 year prior to study entry, or any use of illicit substances or tetrahydrocannabinol ("THC") within 2 months prior to study entry.
  • In the opinion of the investigator, the subject has a significant risk for suicidal behavior during the course of their participation in the study, or the subject is considered to be an imminent danger to themself or others.
  • Clinically significant nasal pathology or history of significant nasal trauma, nasal surgery, total anosmia, or nasal septum perforation that may have damaged the nasal chemosensory epithelium.
  • Two or more documented failed adequate treatment trials with a registered medication approved for SAD.
  • Currently receiving cognitive-behavioral therapy (CBT), exposure therapy, or acceptance and commitment therapy.
  • Subjects taking psychotropic medications within 30 days before Visit 2.
  • Use of any over-the-counter product, prescription product, off-label treatment, cannabidiol ("CBD"), or herbal preparation for treatment of the symptoms of anxiety or social anxiety within 30 days before Visit 2.
  • Prior participation in a clinical trial involving fasedienol.
  • Participation in any other clinical trial within the last 30 days or during the course of the current trial.
  • Subjects with a positive urine drug screen.
  • Women who have a positive urine pregnancy test.
  • Women who are currently breastfeeding are not eligible unless they are willing to stop breastfeeding for the duration of the study.
  • Subjects who have tested positive and/or have exhibited symptoms consistent with SARS-CoV-2 infection during the 4 weeks prior to Screening (Visit 1).
  • Any clinically significant medical history or findings as determined by the Investigator that could interfere with the objectives of the study or put the participant at risk.

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: Triple

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.
Experimental: Fasedienol Nasal Spray
Drug: Fasedienol Nasal Spray
Nasal spray delivered 20 minutes before the PSC
Experimental: Placebo Nasal Spray
Drug: Placebo Nasal Spray
Nasal spray delivered 20 minutes before the PSC

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
Subjective Units of Distress Scale (SUDS)
Time Frame: 7 days (Visit 2 to Visit 3)
The SUDS is a patient self-rated scale that is scored in the range of 0 to 100 (operationalized for participants in this study as 0=totally relaxed or no anxiety and 100=highest distress or anxiety ever felt).
7 days (Visit 2 to Visit 3)

Secondary Outcome Measures

Secondary Outcome Measures

In a clinical study's protocol, a planned outcome measure that is not as important as the primary outcome measure for evaluating the effect of an intervention but is still of interest. Most clinical studies have more than one secondary outcome measure.
Outcome Measure
Measure Description
Time Frame
Global Impression Scale of Improvement (CGI-I)
Time Frame: 7 days (Visit 2 to Visit 3)
The CGI-I scale is a clinician-rated scale to assess illness improvement. The CGI-I scale includes one item being scored from 1 (best outcome) to 7 (worst outcome) with 4 being no change.
7 days (Visit 2 to Visit 3)
Patient Global Impression of Change (PGI-C)
Time Frame: 7 days (Visit 2 to Visit 3)
The PGI-C is a patient self-rated scale to assess improvement. The PGI-C includes 7 items being scored from 1 (best outcome) to 7 (worst outcome) with 4 being no change.
7 days (Visit 2 to Visit 3)

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.
VistaGen Therapeutics, Inc.

Publications and helpful links

The person responsible for entering information about the study voluntarily provides these publications. These may be about anything related to the study.

Helpful Links

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.
September 16, 2024

Primary Completion (Actual)

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.
April 21, 2026

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.
April 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).
September 24, 2024

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.
September 24, 2024

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.
September 26, 2024

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.
May 22, 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.
May 20, 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.
September 1, 2025

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.
  • PH94B-CL043

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

product manufactured in and exported from the U.S.

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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