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Psychedelic

Psilocybin for Perception Disorders

Phase 1
Recruiting
Research Sponsored by University of California, Berkeley
Eligibility Criteria Checklist
Specific guidelines that determine who can or cannot participate in a clinical trial
Must have
Are able to swallow capsules.
Are ≥21 years of age at time of Informed Consent Form signing
Timeline
Screening 3 weeks
Treatment Varies
Follow Up statistical tests will be performed after all data collection is complete.
Awards & highlights

Study Summary

This trial will test how psilocybin affects visual perception and the brain's representation of the visual environment. fMRI will be used to measure brain activity in different brain areas while subjects are performing a visual perceptual task.

Who is the study for?
This trial is for healthy adults over 21 who can swallow capsules and agree to birth control if applicable. They must attend all study visits, have a support person for post-dosing safety, and inform researchers of medical changes. Excluded are those with poor liver or kidney function, recent drug use including psychedelics, certain medication use, psychiatric disorders, MRI contraindications like metal implants or claustrophobia, uncontrolled hypertension or heart issues.Check my eligibility
What is being tested?
The trial studies how psilocybin affects visual perception by using fMRI scans while participants do visual tasks. It aims to identify brain areas involved in the altered perception caused by psilocybin in a diverse group of healthy subjects.See study design
What are the potential side effects?
While not explicitly listed here, potential side effects from psilocybin may include nausea, headache, dizziness, altered sense of time and reality (hallucinations), mood swings (anxiety or euphoria), and increased blood pressure.

Eligibility Criteria

Inclusion Criteria

You may be eligible if you check “Yes” for the criteria below
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I can swallow pills.
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I am 21 years old or older.
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I have someone to take me home safely after treatment.
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I have someone to take me home safely after treatment.

Timeline

Screening ~ 3 weeks
Treatment ~ Varies
Follow Up ~functional mri recordings will begin approximately 30 minutes after oral administration of experimental or comparator arm treatment and will continue for up to two hours.
This trial's timeline: 3 weeks for screening, Varies for treatment, and functional mri recordings will begin approximately 30 minutes after oral administration of experimental or comparator arm treatment and will continue for up to two hours. for reporting.

Treatment Details

Study Objectives

Outcome measures can provide a clearer picture of what you can expect from a treatment.
Primary outcome measures
Amplitude and pattern of fMRI cortical responses
Secondary outcome measures
Participant-reported Subjective Effects
Perceptual measurements
Voxelwise modeling

Side effects data

From 2021 Phase 2 trial • 95 Patients • NCT02061293
9%
Nausea
7%
Pain
7%
Viral upper resp. tract infection
7%
Back pain
7%
Bronchitis
4%
Suicidal Ideation
4%
Oropharyngeal pain
4%
Insomnia
4%
Influenza
4%
Depression
4%
Diarrhea
4%
Headache
4%
Sinus headache
4%
Depressed mood
4%
Lower resp. tract congestion
4%
Alcohol withdrawal syndrome
2%
Restlessness
2%
Fungal infection
2%
Rhinorrhea
2%
Pyrexia
2%
Hypoesthesia
2%
Oedema
2%
Vomiting
2%
Musculoskeletal pain
2%
Peripheral swelling
2%
Thrombocytosis
2%
Eye infection
2%
Constipation
2%
Dermatitis contact
2%
Bronchitis bacterial
2%
Traumatic lung injury
2%
Hyponatremia
2%
Arthralgia
2%
Pain in extremity
2%
Dizziness
2%
Migraine
2%
Sedation
2%
Anger
2%
Anxiety
2%
Cough
2%
Sexual abuse
2%
Sinus congestion
2%
Malignant melanoma
2%
Endodontic procedure
2%
Mallory-Weiss Syndrom
2%
Anemia
2%
Influenza like Illness
2%
Gingivitis
2%
Arthoscopic surgery
100%
80%
60%
40%
20%
0%
Study treatment Arm
Diphenhydramine
Psilocybin

Trial Design

2Treatment groups
Experimental Treatment
Group I: ExperimentalExperimental Treatment1 Intervention
Psilocybin 0-14 mg, before fMRI measurement
Group II: ComparatorExperimental Treatment1 Intervention
Psilocybin 0-14 mg, before fMRI measurement
Treatment
First Studied
Drug Approval Stage
How many patients have taken this drug
Psilocybin
Not yet FDA approved

Find a Location

Logistics

Participation is compensated

You will be compensated for participating in this trial.

Who is running the clinical trial?

University of California, BerkeleyLead Sponsor
181 Previous Clinical Trials
721,076 Total Patients Enrolled

Media Library

Psilocybin (Psychedelic) Clinical Trial Eligibility Overview. Trial Name: NCT05265546 — Phase 1
Perception Disorders Research Study Groups: Comparator, Experimental
Perception Disorders Clinical Trial 2023: Psilocybin Highlights & Side Effects. Trial Name: NCT05265546 — Phase 1
Psilocybin (Psychedelic) 2023 Treatment Timeline for Medical Study. Trial Name: NCT05265546 — Phase 1

Frequently Asked Questions

These questions and answers are submitted by anonymous patients, and have not been verified by our internal team.

Are participants being admitted to this experiment presently?

"According to clinicaltrials.gov, this medical trial is no longer accepting patients for enrollment. Initially posted on October 1st 2022 and last edited on July 26th of the same year, 13 other studies are currently open to potential participants."

Answered by AI

What potential risks are associated with utilizing psilocybin therapeutically?

"The limited data supporting psilocybin's safety and efficacy lead to our team at Power ranking it as a 1 on the scale of safety."

Answered by AI

Who else is applying?

What state do they live in?
Arizona
Florida
Other
California
How old are they?
65+
18 - 65
What site did they apply to?
University of California, Berkeley
What portion of applicants met pre-screening criteria?
Did not meet criteria
Met criteria

Why did patients apply to this trial?

I am excited about advancing research. I am curious about how psilocybin affect visual perception.
PatientReceived no prior treatments
~53 spots leftby Dec 2025