ClinicalTrials.gg
WithdrawnNCT04989972Updated Jun 30, 2022

Assessing the Efficacy of Micro-dosed Psilocybin on Reducing Anxiety & Depression Levels in Adults

A Phase 2 interventional study of PSIL428 and Oyster mushroom in Anxiety and Depression, sponsored by Wake Network, Inc.. Withdrawn at 1 site in Jamaica. Open to participants aged 18 Years to 80 Years. Per ClinicalTrials.gov, last updated 2022-06-30.

Primary conditionDepressionRegistry: Anxiety DisordersReclassifiedWhy we changed it
Registry
Anxiety Disorders — the first condition term the registry derived for this study.
ClinicalTrials.gg
Depression
Why
  1. The registry often attaches Anxiety Disorders to studies about something else, and this study's title and listed conditions do not name it.
  2. The study's listed conditions name Depression.
Confidence
High: the new condition is named in the study's own listed conditions. Of 351 hand-checked studies reclassified this way, 68% were exactly right and 84% in the right disease family; the registry's first term was right for 5% (measured 2026-10-21). How we classify →
Wrong?
Tell us the study's main condition →

Sponsored by Wake Network, Inc. · Phase 2, Interventional, and Treatment

Why this study was withdrawn
GCP VIOLATIONS FROM THE SPONSORS
Phase
Phase 2
Study type
Interventional
Enrollment
0
Allocation
Randomized
Ages
18 Years to 80 Years
Sex
All
01

Study summary

To investigate the efficacy of a 16 week treatment with PSIL428 patient reported anxiety levels in otherwise healthy individuals suffering from depression and or anxiety symptoms.

Read the detailed description

Randomized, double-blind, placebo-controlled study assessing the efficacy of micro-dosed psilocybin on reducing anxiety and/or depression levels in adults

Study summary:

The Institute for Health Metrics and Evaluation reported that Anxiety disorders currently affect an estimated 275 million people worldwide, about one in 13 people (7.3 percent).

COVID-19 has accelerated the rate of new anxiety diagnoses and exacerbated pre-existing diagnoses of anxiety in individuals worldwide.

The effectiveness of full dose psilocybin for treatment of anxiety and depression has been shown in a number of clinical trials. While there is a significant evidence of clinical efficacy of full dose psilocybin, acute effects of the dose result in a significant impairment - perceptual and sensory distortions incapacitating the patient for the duration of drug activity. Recent work suggests while not producing perceptual changes, micro-dosing may indeed be associated with improved mood and enhanced well-being. The practice of micro-dosing is gaining popularity in the general population, while clinical data on its safety and efficacy is lacking.

This will be a novel randomized, double-blind, placebo-controlled study aimed at establishment of safety and anxiolytic efficacy of psilocybin PSIL428 administered in a micro-dosing regimen (2-5% of a full therapeutic dose) to adults suffering from depression or anxiety.

The primary outcome of this study is the change in anxiety and/or depression levels from screening to week 16. Participant anxiety levels will be monitored through Beck Anxiety inventory, depression levels - through Beck Depression Inventory forms on a bi-weekly basis across the course of the study.

Study Drug PSIL428 is an experimental intervention and the active ingredient psilocybin is botanically derived. Similar interventions are currently undergoing Phase IIb/III clinical trials in international jurisdictions. It is being assessed for treatment of depressive disorders. Typically psilocybin used in full therapeutic doses associated with significant acute adverse effects. The proposed trial would utilize psilocybin in different dosing regimen - as micro-dosing - ingesting of sub-perceptual doses of the drug equal to 2-10% of the full dose. The micro-dosing practice is gaining significant popularity world-wide, however evidence-based data around it is minimal. Risks and benefits associated with the trial are not definitively established, however existing pre-clinical and clinical data around full-dose use of the drug carries a favorable risk-benefit potential.

The trial will be conducted in accordance with the most recently acceptable version of the Declaration of Helsinki, Good Clinical Practice (GCP) according to International Conference on Harmonization (ICH) guidelines, and applicable Standard Operating Procedures (SOPs). The trial will be conducted under a protocol reviewed and approved by an IRB; the trial will be conducted by scientifically and medically qualified persons; the benefits of the study are in proportion to the risks; the rights and welfare of the subjects will be respected; each subject will give his or her written informed consent before any protocol-driven tests or evaluations are performed.

The investigators are responsible for obtaining informed consent in adherence to GCP and according to applicable regulations prior to entering the subject into the trial.

A positive change in Beck Anxiety and/or Beck Depression numeric levels between PSIL428 and placebo groups will mark our primary outcome achievement of confirming beneficial effects of micro-dose-administered psilocybin on study participants' overall anxiety and/or depression levels

02

Conditions studied

  • Anxiety and Depression

Browse trials for

03

In context

Depression Reclassified

8,577 studies on the registry are indexed under Depression; 1,720 are open to participants now.

Browse Depression studies →

Lead sponsor

This is the only study on the registry with Wake Network, Inc. as lead sponsor.

Compared within Depression, this study's primary condition as ClinicalTrials.gg classifies it; the registry's first condition term is Anxiety Disorders. The counts are of registry records indexed under each term, refreshed daily. How we classify →

04

Who can participate

Ages eligible
18 Years to 80 Years
Sexes eligible
All
Accepts healthy volunteers
No

Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.

Inclusion criteria

  • Experiencing persistent anxiety and/or depression symptoms
  • Scoring between 10-20 on BAI and/or between 15-25 on BDI-II
  • Females and males with the minimum age of 18 at screening;
  • Not of child bearing potential, which is defined as females who have had hysterectomy or oophorectomy, bilateral tubal ligation or are (natural or surgically with 1 year since last menstruation)

OR

  • Female participants of must agree to use a medically approved method of and have a negative urine pregnancy test result, prior to enrollment. All hormonal birth controls require a minimum stability of three months and remain consistent throughout the study. Acceptable methods of birth control include:
  • Hormonal contraceptives; oral, hormone patch (Ortho Evra), vaginal ring (NuvaRing), injectable (Depo-Provera, Lunelle), or hormone implant (Norplant System)
  • Double-barrier method
  • Intrauterine devices
  • Non-heterosexual lifestyle or agrees to use contraception if planning on changing to heterosexual partner(s)
  • Vasectomy of partner (shown successful as per appropriate follow-up);
  • Willing to maintain current levels of activity throughout the study;
  • Healthy as determined by self-report and medical history;
  • Willingness to complete all study visits and requirements associated with the study;
  • Has access to a computer, tablet, or smart phone with internet connection; sufficiently comfortable with using app-based technology for data gathering;
  • Has given voluntary, written, to participate in the study.

Exclusion criteria

Exclusion Criteria

  • Individuals who are pregnant, breastfeeding, or planning to become pregnant.
  • Individuals with psychotic disorders including schizophrenia; bipolar disorder. personality disorder. Participants with 1st-degree relatives with related psychotic disorders.
  • Alcohol or drug abuse within the last 6 months that meets the , 5th Edition (DSM-5) criteria.
  • Participation in a clinical research study within 30 days of enrollment.
  • Allergy or sensitivity to study product ingredients.
  • abnormal laboratory results at screening.
  • Unstable medical conditions as assessed by the Principal Investigator.
  • Individuals who are cognitively impaired and/or unable to give .
  • Any other condition which in the Principal Investigator's opinion may adversely affect the participant's ability to complete the study or its measures or which may pose significant risk to the participant.
  • Individuals who have taken a psychedelic drug (Psilocybin, DMT, Peyote, Ayahuasca, Ibogaine, LSD, Ketamine) within 60 days of screening.
Terms in these criteria, in plain language(6)

Underlined terms in the criteria open these too. Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.

Postmenopausal

Periods have stopped for good: usually no period for 12 months in a row without another medical reason, sometimes confirmed by a blood test (FSH).

Childbearing potential

Able to become pregnant: from the first period until menopause, unless permanently unable to through surgery (removal of the womb, or of both ovaries or both fallopian tubes).

Criteria for people of childbearing potential usually ask for a negative pregnancy test and for contraception during the study and for a time after it.

Contraception

Ways of preventing pregnancy. “Highly effective” methods fail less than 1% of the time a year when used correctly — for example an IUD or an implant.

Criteria usually say which methods count and how long to keep using them after the last dose, sometimes for male participants too. Some studies accept a partner’s vasectomy if it was confirmed successful and that person is the participant’s only sexual partner.

Informed consent

Before you join, the study team explains what taking part involves — its purpose, what happens, the risks and possible benefits — and answers your questions, so you can decide freely. Consent is usually recorded on a form (the informed consent form, ICF) signed by you or, where the law allows, by someone legally authorised to decide for you.

You can keep asking questions during the study, you are told of new information that matters, and you can choose to leave at any time.

DSM diagnostic criteria

The American Psychiatric Association’s manual of mental health diagnoses. DSM-5 (2013, revised as DSM-5-TR in 2022) replaced DSM-IV, and some studies still name the older edition. “Meets DSM criteria for …” means diagnosed by that edition’s diagnostic criteria, usually by a clinician in an interview.

Clinically significant

Judged by the study doctor to matter for your health or for the study. It is a doctor’s decision, so ask the study team if you are unsure whether something counts.

05

Study design

Phase
Phase 2
Primary purpose
Treatment
Allocation
Randomized
Intervention model
Parallel assignment
Masking
Double (Participant, Investigator)
Enrollment
0 participants (actual)

Study arms

  • Experimental
    Intervention arm

    participants will take the active intervention PSIL428

    Drug: PSIL428

  • Experimental
    placebo arm

    participants will take the intervention 1 mg Oyster mushrooms

    Dietary Supplement: Oyster mushroom

  • Experimental
    open label

    all participants will take the active intervention PSIL428

    Drug: PSIL428

Interventions

  • DrugPSIL428

    1 mg of psilocybin

  • Dietary supplementOyster mushroom

    1 mg of oyster mushroom

  • DrugPSIL428

    1 mg psilocybin

06

What researchers measure

Primary outcomes

  1. Changes in Beck Anxiety Inventory BAI

    Measures 21 items in physical and cognitive anxiety ranges 0-7 mild, to 26-63 severe Questionnaire BDI-11

    Time frame: Screening to week 16

  2. Changes in Beck Depression Inventory 02 - BDI-II

    Measures 21 items in the presence and severity of depressive symptoms 0-9 no depression, 10 -18 mild depression, 19-29 moderate to severe depression

    Time frame: screening to week 16

Secondary outcomes

  1. Change in the European Quality of life 5 dimensions- EQ-5D

    changes between the intervention PSIL-428 and placebo groups for mobility, self-care, pain \& discomfort, usual activities and anxiety \& depression

    Time frame: screening to week 16

  2. Cognitive flexibility, using the Stroop Color & Word Test (SCWT)

    Changes in cognition between the PSIL-428 and placebo groups in the reading of words as compared to identifying \& naming colors. A stopwatch is used and the test-taker reads color words or names ink colors from different pages as quickly as possible. An interference score, cognitive flexibility, creativity and reaction to cognitive pressure are measured

    Time frame: Screening to week 16

  3. Changes in resilience using the Brief Resiliency Scale

    assesses the ability of the individual to bounce back or recover from stress a score of one means low resiliency and a score of 5 means high resiliency

    Time frame: Screening to 16 weeks

  4. Measurement of higher level cognitive processes using the Wisconsin Card Sorting Test

    Uses two card packs, having 4 stimulus cards and 64 response cards measures attention, perseverance , abstract thinking and set shifting.

    Time frame: screen to 16 weeks

  5. The incidence of adverse events

    The number of reported cases of adverse events

    Time frame: Screening to 16 weeks

  6. The severity of adverse events

    Adverse events which range from mild,moderate, severe and lethal

    Time frame: Screening to 16 weeks

  7. Incidence of abnormal blood pressure

    Blood pressure which is consistently above and below120/80

    Time frame: Screening to 16 weeks

  8. Incidence of abnormal heart rate

    The incidence of atrial fibrillation, supraventricular tachycardia or bradycardia

    Time frame: Screening to 16 weeks

  9. incidence of irregular heart rate

    incidence of arrhythmias

    Time frame: Screening to 16 weeks

  10. incidence of suicidal ideation using the Columbian Suicide Severity Rating Scale

    Measures Suicidal Ideation items 1-5; Suicidal Behavior 6-10 and both Suicidal Ideation and Behavior Items 1-10

    Time frame: Screening to 16 weeks

  11. Change in the number of steps

    Wearable and or mobile devices

    Time frame: Screening to Week 16

  12. Changes in concomitant medication

    Recently prescribed medication

    Time frame: Screening to 16 weeks

  13. Changes in volume of Alcohol

    self reports

    Time frame: screening to 16 weeks

  14. Changes in the number of cigarettes

    self reports

    Time frame: screening to 16 weeks

  15. Changes in the number of cannabis joints

    Self reports

    Time frame: Screening to 16 weeks

  16. Changes in other over the counter medication

    Self Reports

    Time frame: Screening to 16 weeks

  17. Changes in Estradiol

    Salivary panel profile values

    Time frame: Screening to 16 weeks

  18. Changes in Testosterone

    Salivary panel profile vales

    Time frame: Screening to 16 weeks

  19. Changes in Cortisol

    Salivary panel profile values

    Time frame: Screening to 16 weeks

  20. Changes in Progesterone

    Salivary panel profiles values

    Time frame: Screening to 16 weeks

  21. Changes in Melatonin

    Salivary panel profile values

    Time frame: Screening to 16 weeks

  22. Changes in DHEA (Dehydroepiandrosterone)

    Salivary panel profile values

    Time frame: Screening to 16 weeks

  23. Changes in DHT(Dihydrotestosterone)

    Salivary panel profile values

    Time frame: Screening to 16 weeks

  24. Changes in Androstenedione

    Salivary panel profile values

    Time frame: Screening to 16 weeks

  25. Changes in Estrone

    Salivary panel profile values

    Time frame: Screening to 16 weeks

07

Study locations

1 site
  • FMS Department of Psychiatry
    Kingston, Jamaica
08

References and documents

Individual participant data

Plan to share: No — The data will be made available through publications and conference presentations

No publications or documents are linked to this record.

09

Timeline

Tracking since Sep 25, 2026
ElapsedEstimatedEstimated, not yet reached

Start is estimated for Sep 2022; primary completion for Jun 2023, 9 months later.

How these figures are worked out, and which studies are left out of them.

Registered
Jul 12, 2021
First posted
Aug 4, 2021
StartEst.
Sep 15, 2022
Primary completionEst.
Jun 20, 2023
CompletionEst.
Aug 31, 2023
Last update
Jun 30, 2022
What these dates mean
Start.
When the first participant enrolled; while estimated, when the study expects to open to recruitment.
Primary completion.
When the last participant was examined or treated to collect data for the study's main question, its primary outcome. A study that stopped early gives the date its data collection stopped.
Completion.
When the last participant's last visit took place, for every outcome, secondary ones and side effects included: the end of the study. Often later than primary completion, sometimes the same day.
Actual and Est.
Actual means the registry says the date has happened. Est. (estimated) is a date the sponsor plans or expects. It can still move, and the sponsor is expected to change it to actual once it has passed.
No changes since tracking began. The registry record was last updated on Jun 30, 2022, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
10

Registry details

Key details

Study ID
NCT04989972
Lead sponsor
Wake Network, Inc.
Collaborators
Professor Roger Gibson Section of Psychiatry Faculty of Medical Sciences UWI
Responsible party
Sponsor
First posted
Aug 4, 2021
Start date
Sep 15, 2022 (estimated)
Primary completion
Jun 20, 2023 (estimated)
Completion
Aug 31, 2023 (estimated)
Last update
Jun 30, 2022

Study contacts

Roger Gibson
principal investigator · Faculty of Medical Sciences UWI Mona
Sharon White
study director · Wake Network, Inc.

Oversight

Data monitoring committee
Yes
FDA-regulated drug
No
FDA-regulated device
No
View the source record on ClinicalTrials.gov ↗

Not currently enrolling

This study is withdrawn, as verified in Jun 2021. You cannot join it, but the record below documents what was studied.

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