Completed

An Open Label Study of Single-Dose Psilocybin for Major Depressive Disorder With Co-occurring Borderline Personality Disorder

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What is being tested

Psilocybin

Drug
Who is being recruted

Mental Disorders+3

+ Borderline Personality Disorder

+ Depressive Disorder, Major

From 18 to 65 Years
See all eligibility criteria
How is the trial designed

Treatment Study

Phase 2
Interventional
Study Start: November 2023
See protocol details

Summary

Principal SponsorUniversity of Chicago
Last updated: January 28, 2026
Sourced from a government-validated database.Claim as a partner

Study start date: November 1, 2023

Actual date on which the first participant was enrolled.

The primary objective of the proposed study is to evaluate the safety and efficacy of psilocybin in adults with major depressive disorder (MDD) and borderline personality disorder (BPD). Ten subjects with MDD and BPD will receive a single 25 mg oral dose of psilocybin. The hypothesis to be tested is that psilocybin will result significant reduction in symptoms of both MDD and BPD after 1 week and sustained for 4 weeks compared to baseline (improvement in symptoms will be indicated by lower scores on established outcome measures of MDD and BPD symptoms that have been used in prior studies).

Official TitleAn Open Label Study of Single-Dose Psilocybin for Major Depressive Disorder With Co-occurring Borderline Personality Disorder
NCT05399498
Principal SponsorUniversity of Chicago
Last updated: January 28, 2026
Sourced from a government-validated database.Claim as a partner

Protocol

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

9 patients to be enrolled

Total number of participants that the clinical trial aims to recruit.

Treatment Study

These studies test new ways to treat a disease, condition, or health issue. The goal is to see if a new drug, therapy, or approach works better or has fewer side effects than existing options.



Eligibility

Researchers look for people who fit a certain description, called eligibility criteria: person's general health condition or prior treatments.
Conditions
Criteria

Any sex

Biological sex of participants that are eligible to enroll.

From 18 to 65 Years

Range of ages for which participants are eligible to join.

Healthy volunteers not allowed

If individuals who are healthy and do not have the condition being studied can participate.

Conditions

Pathology

Mental DisordersBorderline Personality DisorderDepressive Disorder, MajorDepressive DisorderPersonality DisordersMood Disorders

Criteria

Inclusion Criteria: * Age 18-65 * Diagnosed with current major depressive disorder * Montgomery-Asberg Depression Rating Scale (MADRS) score of \> 20 * Diagnosed with borderline personality disorder * Borderline Personality Disorder Symptom Assessment Scale (BPD-SAS) score of \> 20 * Ability to understand and sign the consent form Exclusion Criteria: * Unstable medical illness based on history or clinically significant abnormalities on baseline physical examination * Current pregnancy or lactation, or inadequate contraception in women of childbearing potential * Illegal substance use based on urine toxicology screening (except cannabis use) * Current or past history of bipolar I disorder, schizophrenia, or schizoaffective disorder * Active substance use disorder

Study Plan

Find out more about all the medication administered in this study, their detailed description and what they involve.
Treatment Groups
Study Objectives

One single intervention group is designated in this study

This study does not include a placebo group 

Treatment Groups

Group I

Experimental
Single 25 mg capsule oral dose of psilocybin

Study Objectives

Primary Objectives

Secondary Objectives

Study Centers

These are the hospitals, clinics, or research facilities where the trial is being conducted. You can find the location closest to you and its status.

This study has 1 location

Suspended

University of Chicago

Chicago, United StatesOpen University of Chicago in Google Maps
CompletedOne Study Center
An Open Label Study of Single-Dose Psilocybin for Major Depressive Disorder With Co-occurring Borderline Personality Disorder | PatLynk