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Magic mushroom compound shows promise for tough depression

NCT ID NCT03554174

Symptom relief Sponsor: Yale University Source: ClinicalTrials.gov ↗

What the study statuses mean

This study's is highlighted.

Recruitment status, easiest to join first

Recruiting now
This trial is taking on new participants right now.
Not yet recruiting
Registered, but not yet taking participants.
By invitation only
Not open to general applications. Only people the study team invites can take part.
Paused
Paused for now. It may or may not start again.
Ongoing This study
Running, but no longer taking on new participants.
Completed
The trial has finished. Results may not be published yet.
Stopped early
Stopped early, before it reached the end. That can be for many reasons, including safety.
Cancelled
Cancelled before anyone took part.

Expanded access (not trials)

Expanded access
Not a trial. This treatment can be requested outside a study, case by case, for people who qualify.
Expanded access (paused)
Not a trial. The treatment can normally be requested outside a study, but is unavailable right now.
Expanded access (ended)
Not a trial. The treatment could once be requested outside a study, but no longer can.
Approved
The treatment has been approved, so it is available normally rather than through this programme.

When the status isn't known

Details not published
The full record has not been published yet, so there is little to show here.
Status unknown
This status has not been confirmed recently, so it may be out of date.

First seen Jun 27, 2026 · Last updated Jun 27, 2026

Summary

This small pilot study tests whether psilocybin, the active ingredient in magic mushrooms, can change brain connections to improve depression. 18 adults with major depression who didn't get better with standard treatments will receive psilocybin. Researchers will measure brain activity and memory to see if the drug helps rewire the brain and ease symptoms.

This is an AI summary of the original study and may miss details. Read our disclaimer.

Study facts

What this study's own registry entry says, in plain language.

Phase

Phase 1

The first testing in people. Mainly checks safety and dose, usually in a small group.

Participants

About 18 people

The number the study aims to enrol. It can still change while the study runs.

Started

Feb 2018

Expected to finish

Sep 2026

An estimate. End dates often move.

Lead sponsor

Other sponsor

The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.

Who can take part

This study's own entry requirements. Only the study team can say for certain whether you qualify.

Ages

18 to 65 years

Sex

Anyone

Healthy volunteers

Not accepted

This study is not open to healthy volunteers. The entry requirements below say who it is open to.

Show the full entry requirements

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Inclusion Criteria: * Diagnosed with Major Depressive Disorder (MDD), single or recurrent episode, and currently experiencing a Major Depressive Episode (MDE) * Failed to achieve a satisfactory clinical response to at least one adequate antidepressant trial during the current depressive episode * Currently engaged in treatment with a mental health clinician Exclusion Criteria: * Axis I psychotic disorder (e.g. schizophrenia, bipolar I, depression with psychosis) * Axis I psychotic disorder in first degree relative * Currently taking a conventional antidepressant medication * Unstable medical or neurological conditions * Significant cognitive disorders * History of intolerance to drugs known to significantly alter perception e.g., psilocybin, LSD, salvinorin A, mescaline, etc. * Pregnant, breastfeeding, lack of adequate birth control * Urine toxicology positive to drugs of abuse on experimental test days

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Conditions

The condition(s) this trial relates to.

major depressive disorder

As listed by the trial registrant

The condition terms exactly as the trial's registrant entered them.

Major depressive disorder

Contacts and locations

Locations

  • VA Connecticut Healthcare System, West Haven Campus

    West Haven, Connecticut, 06516, United States

More trials for these conditions

Other studies related to the condition(s) this trial covers.