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Psilocybin for Amblyopia - Targeting Critical Periods in Humans (PATCH)

30 oktober 2026 bijgewerkt door: Johns Hopkins University

Psilocybin for Amblyopia - Targeting Critical Periods in Humans (PATCH)

The purpose of this study is to evaluate whether ingestion of a drug called psilocybin can increase the effectiveness of amblyopia therapy in adults with amblyopia. Psilocybin is a naturally-occurring psychoactive compound found in many species of mushrooms. It can be ingested orally and can result in strong but short-term (4-6 hours) effects such as changes in perception, thoughts, and emotions.

Studie Overzicht

Toestand

Werving

Conditie

Interventie / Behandeling

Gedetailleerde beschrijving

Participation in this study involves up to 12 visits over 9-13 weeks, including a screening visit, a preparation visit, two all-day experimental drug administration sessions with psilocybin, and eight follow up visits.The purpose of these follow-up visits is to deliver in-lab amblyopia therapy, measure visual function, and monitor safety. Participants will also be asked to complete amblyopia therapy at home: this will involve wearing an eyepatch or an eyeglasses filter over the non-amblyopic eye every day for up to several hours and completing online training exercises.

Studietype

Ingrijpend

Inschrijving (Geschat)

24

Fase

  • Fase 2
  • Fase 1

Contacten en locaties

In dit gedeelte vindt u de contactgegevens van degenen die het onderzoek uitvoeren en informatie over waar dit onderzoek wordt uitgevoerd.

Studiecontact

Studie Locaties

  • Verenigde Staten
    • Maryland
      • Baltimore, Maryland, Verenigde Staten, 21224
        • Werving
        • Johns Hopkins Center for Psychedelic and Consciousness Research
        • Hoofdonderzoeker:
          • Frederick S. Barrett, PhD
        • Contact:

Deelname Criteria

Onderzoekers zoeken naar mensen die aan een bepaalde beschrijving voldoen, de zogenaamde geschiktheidscriteria. Enkele voorbeelden van deze criteria zijn iemands algemene gezondheidstoestand of eerdere behandelingen.

Geschiktheidscriteria

Leeftijden die in aanmerking komen voor studie

18 jaar tot 65 jaar (Volwassen, Oudere volwassene)

Accepteert gezonde vrijwilligers

Nee

Geslachten die in aanmerking komen voor studie

Allemaal

Beschrijving

Inclusion Criteria:

  • 18 to 65 years old
  • Have given written informed consent
  • Have at least a high-school level of education or equivalent (e.g. GED) and be fluent in English
  • Be healthy and psychologically stable as determined by screening for medical and psychiatric problems via a personal interview, a medical questionnaire, medical history and physical examination, an electrocardiogram (ECG), and routine medical blood and urinalysis laboratory tests
  • Women who are of child-bearing potential and sexually active agree to use highly effective means of birth control (i.e. implants, injectables, combined oral contraceptives, progestin-containing intrauterine device (IUD) or vasectomized partner) for the duration of this study
  • Agree to consume approximately the same amount of caffeine-containing beverage (e.g. coffee, tea) that he/she consumes on a usual morning, before arriving at the research unit on the morning of the drug session day. If the participant does not routinely consume caffeinated beverages, he/she must agree not to do so on the session day.
  • Agree to refrain from using any psychoactive drugs, including alcoholic beverages and nicotine, within 24 hours of each drug administration. The exception is caffeine.
  • Agree not to take any as needed (PRN) medications on the mornings of drug sessions
  • Agree not to take sildenafil (Viagra®), tadalafil, or similar medications within 72 hours of each drug administration.
  • Agree that for one week before each drug session, he/she will refrain from taking any nonprescription medication, nutritional supplement, or herbal supplement except when approved by the study investigators. Exceptions will be evaluated by the study investigators and will include acetaminophen, non-steroidal anti-inflammatory drugs, and common doses of vitamins and minerals.
  • Have a clinical diagnosis of amblyopia, with best-corrected visual acuity in the range of 0.2 - 1.0 LogMAR (approximately equivalent to 20/30 to 20/200)
  • Has undergone an eye exam and prescription assessment within a recent period
  • Has been wearing current spectacle correction for a minimum of six weeks prior to enrollment

Exclusion Criteria:

  • Women who are pregnant (as indicated by a positive urine pregnancy test assessed at intake and before each drug session) or nursing; women who are of child-bearing potential and sexually active who are not practicing highly effective means of birth control (i.e. those that result in <1% failure rate per year; note that condoms alone are not considered highly effective)
  • Cardiovascular conditions: coronary artery disease, stroke, angina, uncontrolled hypertension, a clinically significant ECG abnormality (e.g. atrial fibrillation), artificial heart valve, or transient ischemic attack (TIA) in the past year
  • Epilepsy with history of seizures
  • Insulin-dependent diabetes; if taking oral hypoglycemic agent, then no history of hypoglycemia
  • Currently taking on a regular (e.g. daily) basis any medications having a primary centrally-acting serotonergic effect, including monoamine oxidase inhibitor (MAOIs). For individuals who have intermittent or PRN use of such medications, psilocybin sessions will not be conducted until at least five half-lives of the agent have elapsed after the last dose.
  • Current or past history of meeting DSM-5 criteria for schizophrenia spectrum or other psychotic disorders (except substance/medication-induced or due to another medical condition)
  • Current or past history within the last five years of meeting DSM-5 criteria for a severe alcohol or drug use disorder (excluding caffeine and nicotine)
  • Have a first-degree relative with bipolar I disorder, schizophrenia spectrum, or other psychotic disorders (except substance/medication-induced or due to another medical condition)
  • Has a psychiatric condition judged to be incompatible with establishment of rapport or safe exposure to psilocybin
  • Explanation for visual acuity loss other than amblyopia, including cataracts, corneal disease, optic neuropathy, retinopathy, glaucoma, history of eye trauma or intraocular surgery, or any other ocular pathology as determined by study ophthalmologist

Studie plan

Dit gedeelte bevat details van het studieplan, inclusief hoe de studie is opgezet en wat de studie meet.

Hoe is de studie opgezet?

Ontwerpdetails

  • Primair doel: Behandeling
  • Toewijzing: Gerandomiseerd
  • Interventioneel model: Parallelle opdracht
  • Masker: Verviervoudigen

Wapens en interventies

Deelnemersgroep / Arm
Interventie / Behandeling
Experimenteel: 1 mg Psilocybin with Amblyopia Therapy
Gedragsmatig: Amblyopia Therapy

May include: eye-patching, Bangerter filtering, dichoptic training, perceptual learning

Geneesmiddel: 1 mg Psilocybin

The psilocybin used in this study is synthetically manufactured and formulated under current good manufacturing practices (cGMP). The active drug is encapsulated using a size 0 blue gelatin capsule and contains 1 mg of psilocybin.
Experimenteel: 5 mg Psilocybin with Amblyopia Therapy
Gedragsmatig: Amblyopia Therapy

May include: eye-patching, Bangerter filtering, dichoptic training, perceptual learning

Geneesmiddel: 5 mg Psilocybin

The psilocybin used in this study is synthetically manufactured and formulated under current good manufacturing practices (cGMP). The active drug is encapsulated using a size 0 blue gelatin capsule and contains 5 mg of psilocybin.
Experimenteel: 10 mg Psilocybin with Amblyopia Therapy
Gedragsmatig: Amblyopia Therapy

May include: eye-patching, Bangerter filtering, dichoptic training, perceptual learning

Geneesmiddel: 10 mg Psilocybin

The psilocybin used in this study is synthetically manufactured and formulated under current good manufacturing practices (cGMP). The active drug is encapsulated using a size 0 blue gelatin capsule and contains 10 mg of psilocybin.
Experimenteel: 15 mg Psilocybin with Amblyopia Therapy
Gedragsmatig: Amblyopia Therapy

May include: eye-patching, Bangerter filtering, dichoptic training, perceptual learning

Geneesmiddel: 15 mg Psilocybin

The psilocybin used in this study is synthetically manufactured and formulated under current good manufacturing practices (cGMP). The active drug is encapsulated using a size 0 blue gelatin capsule and contains 15 mg of psilocybin.
Experimenteel: 20 mg Psilocybin with Amblyopia Therapy
Gedragsmatig: Amblyopia Therapy

May include: eye-patching, Bangerter filtering, dichoptic training, perceptual learning

Geneesmiddel: 20 mg Psilocybin

The psilocybin used in this study is synthetically manufactured and formulated under current good manufacturing practices (cGMP). The active drug is encapsulated using a size 0 blue gelatin capsule and contains 20 mg of psilocybin.
Experimenteel: 25 mg Psilocybin with Amblyopia Therapy
Gedragsmatig: Amblyopia Therapy

May include: eye-patching, Bangerter filtering, dichoptic training, perceptual learning

Geneesmiddel: 25 mg Psilocybin

The psilocybin used in this study is synthetically manufactured and formulated under current good manufacturing practices (cGMP). The active drug is encapsulated using a size 0 blue gelatin capsule and contains 25 mg of psilocybin.

Wat meet het onderzoek?

Primaire uitkomstmaten

Uitkomstmaat
Maatregel Beschrijving
Tijdsspanne
Change in Amblyopic Eye Visual Acuity
Tijdsspanne: from Baseline to two weeks after experimental drug session 2

Measured using LogMAR scale
from Baseline to two weeks after experimental drug session 2
Change in Fellow Eye Visual Acuity
Tijdsspanne: from Baseline to two weeks after experimental drug session 2

Measured using LogMAR scale
from Baseline to two weeks after experimental drug session 2

Secundaire uitkomstmaten

Uitkomstmaat
Maatregel Beschrijving
Tijdsspanne
Challenging Experiences Questionnaire (CEQ)
Tijdsspanne: Approximately 7 hours after capsule administration during each experimental drug administration session (Visits 3 and 7; two weeks apart).

The Challenging Experience Questionnaire (CEQ) is a self-report measure designed to assess the intensity and quality of difficult or distressing experiences during psychedelic states. Score range 0-5, 0 is equivalent to no challenging experiences and 5 is an extreme (more than ever before in my life). Higher score "more difficult."
Approximately 7 hours after capsule administration during each experimental drug administration session (Visits 3 and 7; two weeks apart).
11-Dimensional Altered States of Consciousness Questionnaire (11D-ASC)
Tijdsspanne: Approximately 7 hours after capsule administration during each experimental drug administration session (Visits 3 and 7; two weeks apart).

The 11D-ASC is a self-report questionnaire designed to assess the phenomenology of altered states of consciousness induced by psychedelics and other methods. The 11 dimensions are: 1) Experience of Unity, (2) Spiritual Experience, (3) Blissful State, (4) Insightfulness, (5) Disembodiment, (6) Impaired Control and Cognition, (7) Anxiety, (8) Complex Imagery, (9) Elementary Imagery, (10) Audio-Visual Synesthesia, and (11) Changed Meaning of Percepts. Each item is rated on a visual analog scale from 0 to 100, and scores for each dimension are calculated as the mean of the corresponding items, ranging from 0 to 100. Higher scores indicate greater intensity of the respective subjective experience, rather than a uniformly better or worse outcome.
Approximately 7 hours after capsule administration during each experimental drug administration session (Visits 3 and 7; two weeks apart).
The World Health Organization-Five Well-Being Index (WHO-5)
Tijdsspanne: At the preparation session, one and two weeks after the first experimental drug administration session, and one, two, and eight weeks after the second drug administration session.

The WHO-5 is a five-item self-report measure of mental well-being over the preceding two weeks. Each item is scored from 0 to 5, yielding a raw total score ranging from 0 to 25. The raw score can be multiplied by four to obtain a percentage score ranging from 0 to 100. Higher scores indicate better mental well-being.
At the preparation session, one and two weeks after the first experimental drug administration session, and one, two, and eight weeks after the second drug administration session.
Amblyopia and Strabismus Questionnaire: English (ASQE)
Tijdsspanne: At the preparation session, two weeks after the first experimental drug administration session, and two and eight weeks after the second experimental drug administration session

The ASQE is a 26-item self-report questionnaire assessing vision-related quality of life in adults with amblyopia and strabismus. Item responses are converted to scores ranging from 0 to 100, and the total score is calculated as the mean of the item scores, ranging from 0 to 100. Higher scores indicate better vision-related quality of life, with 0 representing the worst and 100 the best possible outcome.
At the preparation session, two weeks after the first experimental drug administration session, and two and eight weeks after the second experimental drug administration session
Sheehan Disability Scale (SDS)
Tijdsspanne: At the preparation session, two weeks after the first drug administration session, and two and eight weeks after the second drug administration session.

The Sheehan Disability Scale (SDS) is a patient-rated questionnaire assessing functional impairment across three domains: work/school, social life, and family life/home responsibilities. Each domain is rated on an 11-point scale from 0 (no impairment) to 10 (extreme impairment). The three domain scores are summed to yield a total score ranging from 0 to 30. Higher scores indicate greater functional impairment (worse functioning), while lower scores indicate less impairment (better functioning).
At the preparation session, two weeks after the first drug administration session, and two and eight weeks after the second drug administration session.

Medewerkers en onderzoekers

Hier vindt u mensen en organisaties die betrokken zijn bij dit onderzoek.

Sponsor

Johns Hopkins University

Onderzoekers

  • Hoofdonderzoeker: Frederick Barrett, MD, Johns Hopkins University

Studie record data

Deze datums volgen de voortgang van het onderzoeksdossier en de samenvatting van de ingediende resultaten bij ClinicalTrials.gov. Studieverslagen en gerapporteerde resultaten worden beoordeeld door de National Library of Medicine (NLM) om er zeker van te zijn dat ze voldoen aan specifieke kwaliteitscontrolenormen voordat ze op de openbare website worden geplaatst.

Bestudeer belangrijke data

Studie start (Geschat)

1 november 2026

Primaire voltooiing (Geschat)

1 juli 2028

Studie voltooiing (Geschat)

1 september 2028

Studieregistratiedata

Eerst ingediend

30 oktober 2026

Eerst ingediend dat voldeed aan de QC-criteria

30 oktober 2026

Eerst geplaatst (Werkelijk)

5 november 2026

Updates van studierecords

Laatste update geplaatst (Werkelijk)

5 november 2026

Laatste update ingediend die voldeed aan QC-criteria

30 oktober 2026

Laatst geverifieerd

1 oktober 2026

Meer informatie

Termen gerelateerd aan deze studie

Trefwoorden

Aanvullende relevante MeSH-voorwaarden

Andere studie-ID-nummers

  • IRB00519391

Plan Individuele Deelnemersgegevens (IPD)

Bent u van plan om gegevens van individuele deelnemers (IPD) te delen?

NEE

Informatie over medicijnen en apparaten, studiedocumenten

Bestudeert een door de Amerikaanse FDA gereguleerd geneesmiddel

Ja

Bestudeert een door de Amerikaanse FDA gereguleerd apparaatproduct

Nee

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