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Microdosagem de Psilocibina na Cognição, Humor e Qualidade de Vida

22 de setembro de 2026 atualizado por: Godfrey Pearlson, Yale University

Efeitos da Microdosagem de Psilocibina na Cognição, Humor e Qualidade de Vida: Um Estudo Piloto

This study is being conducted to evaluate how of 30 days of intermittently microdosed psilocybin affects mood, cognition, subjective well-being and structural/functional MRI results compared to a placebo. Investigators hypothesize that compared to placebo, 30 days of intermittently microdosed psilocybin will produce observable changes in mood, cognition, subjective well-being and MRI, in the absence of psychedelic experiences.

Visão geral do estudo

Status

Ainda não está recrutando

Condições

Intervenção / Tratamento

Descrição detalhada

This study is being conducted to evaluate the effects of 30 days of intermittently microdosed psilocybin in a parallel arm double-blind manner on mood, cognition, subjective well-being and structural/functional MRI compared to placebo, using validated psychological assessments and cognitive tests. Investigators hypothesize that compared to placebo, 30 days of intermittently microdosed psilocybin will produce observable changes in mood, cognition, subjective well-being and MRI, in the absence of psychedelic experiences.

Demonstrating significant results in a population of healthy psychedelic non-users will establish a strong precedent for studying the effects of microdosing psychedelics in patient populations, such as those with treatment-resistant depression. Showing that microdosing minimizes risk of adverse outcomes with psychedelic treatment while maintaining beneficial effects would provide useful information relevant to clinical research in psychedelic-assisted psychotherapy. In addition to investigating claims that microdosing psychedelics may improve cognition and mood, this study also aims to test the hypothesis that these effects including those measurable at a brain level may persist beyond the course of the 30 days of the study. There are few to no studies that assessed the longevity of psychedelic effects on the majority of the above measures, so the proposed study may further establish the longer-term benefits of microdosing. The use of structural and functional magnetic resonance imaging (fMRI) will elucidate the mechanisms by which microdosing may be exerting its effects on mood and cognition. Because this is a relatively understudied area, information gleaned from this study will provide service in informing the field in general.

Tipo de estudo

Intervencional

Inscrição (Estimado)

20

Estágio

  • Fase inicial 1

Contactos e Locais

Esta seção fornece os detalhes de contato para aqueles que conduzem o estudo e informações sobre onde este estudo está sendo realizado.

Contato de estudo

Locais de estudo

    • Connecticut
      • Hartford, Connecticut, Estados Unidos, 06106
        • Olin Neuropsychiatry Research Center
        • Contato:

Critérios de participação

Os pesquisadores procuram pessoas que se encaixem em uma determinada descrição, chamada de critérios de elegibilidade. Alguns exemplos desses critérios são a condição geral de saúde de uma pessoa ou tratamentos anteriores.

Critérios de elegibilidade

Idades elegíveis para estudo

21 anos a 55 anos (Adulto)

Aceita Voluntários Saudáveis

Sim

Gêneros Elegíveis para o Estudo

Tudo

Descrição

Inclusion Criteria:

  • No history of psychedelic use OR
  • No use within 10 years, less than or equal to 7x in life OR
  • No use within 5 years, less than or equal to 3x in life
  • Able to read, speak, and understand English
  • Able and willing to provide written informed consent, and willing to commit to study protocol
  • Women of childbearing potential must be on a highly effective birth control method
  • Must have smartphone compatible with mindLAMP app

Exclusion Criteria:

  • Positive screen for recreational drugs or alcohol on test day will result in rescheduling the appointment
  • Current mood, developmental, or psychotic disorders (e.g., schizophrenia, affective disorders) per DSM-V
  • Current or past alcohol or substance use disorder per DSM-V
  • IQ <70 on the Weschler Abbreviated Scale of Intelligence
  • Serious medical, neuro-ophthalmological, or neurological illness (e.g., cancer, seizure disorders, encephalopathy)
  • Current pregnancy, breastfeeding, or ineffective birth control methods
  • History of head trauma with loss of consciousness lasting >30 minutes or concussion in last 30 days
  • Any medical/neurological condition that could compromise neurocognitive performance (e.g., epilepsy, multiple sclerosis, fetal alcohol syndrome)
  • Anyone deemed unsafe to study personnel for any reason; e.g., suicidal ideation
  • Focal brain lesion seen on structural MRI
  • MRI contraindications (e.g., implanted metallic object, severe claustrophobia)
  • Clinically significant risk of suicidality, as determined by a score of 4 or higher on the suicidal ideation subscale of C-SSRS (past 6 months) or any suicidal behavior (lifetime)
  • Currently taking a monoamine oxidase inhibitor, tricyclic antidepressant, other non-SSRI or non-SNRI antidepressants, an antipsychotic or a mood stabilizer
  • Family history of schizophrenia or schizoaffective disorder (first degree relatives), or bipolar disorder type 1 (first degree relatives)
  • Diagnosis of arrhythmia or ongoing cardiovascular disorder
  • Sustained clinically relevant abnormal heart rate (resting supine heart rate >100 bpm) or blood pressure (resting supine sustolic blood pressure (SBP) above 140mmHg or diastolic blood pressure (DBP) above 90mmHg) at screening
  • Clinically relevant abnormal laboratory results, 12-lead ECG, vital signs, cardiopulmonary compromise as detected by echocardiogram, or other physical findings
  • Presence of more than mild regurgitant lesions in any position and left ventricular ejection fraction < 35 %
  • Evidence of pulmonary vascular disease demonstrated by right ventricular systolic pressure >30mmHg
  • Currently taking any GLP-1

Study Discontinuation Criteria

  • Development of active suicidal or homicidal ideation with plan and intent
  • Worsening in mood symptoms, or development of psychotic symptoms that in the opinion of the investigators requires discontinuation
  • Development of severe or life-threatening medical condition
  • Psychiatric or medical hospitalization or incarceration post-screening
  • Adverse reaction to study drug that in the opinion of the investigators requires discontinuation (e.g. acute, clinically significant hypertension, cardiac toxicity, non-acute significant negative psychological changes)

Plano de estudo

Esta seção fornece detalhes do plano de estudo, incluindo como o estudo é projetado e o que o estudo está medindo.

Como o estudo é projetado?

Detalhes do projeto

  • Finalidade Principal: Ciência básica
  • Alocação: Randomizado
  • Modelo Intervencional: Atribuição Paralela
  • Mascaramento: Dobro

Armas e Intervenções

Grupo de Participantes / Braço
Intervenção / Tratamento
Comparador Ativo: Psychedelic group

An imperceptible dose of psilocybin in capsules will be administered to subjects three times weekly for four weeks. Assessments will be conducted once weekly. After 30 days of a steady dose of psilocybin, subjects will be re-assessed with baseline measures.

2.0mg powdered psilocybin derived from Psilocybe cubensis mushrooms, in capsules, provided three times weekly for four weeks

Comparador de Placebo: Placebo group

An dose of placebo in capsules, identical to the active, will be administered to subjects three times weekly for four weeks. Assessments will be conducted once weekly. After 30 days of a steady dose of psilocybin, subjects will be re-assessed with baseline measures.

0mg matching capsules, provided three times weekly for four weeks

O que o estudo está medindo?

Medidas de resultados primários

Medida de resultado
Descrição da medida
Prazo
The Complex Working Memory Span (CWMS) Task- fMRI measure
Prazo: From enrollment to end of treatment at 8 weeks.

CWMS Task assesses immediate plus delayed recall and working memory by assessing working memory capacity by presenting a list of stimuli to be recalled while simultaneously performing a secondary task. This task uses a fully crossed design which includes both same-domain CWMS conditions (e.g. verbal storage combined with verbal processing) as well as cross-domain CWMS conditions (e.g., verbal storage combined with spatial processing). BOLD signal Infrontal lobe.

From enrollment to end of treatment at 8 weeks.
NEO-Five-Factor-Inventory (NEO-FFI)
Prazo: From enrollment to end of treatment at 8 weeks.

The NEO-FFI is a self-description questionnaire with 60 items for the measurement of the "big five": neuroticism, extraversion, openness, agreeableness, and consciousness. It uses a 5-point Likert scale ranging from "completely disagree" to "fully agree.

From enrollment to end of treatment at 8 weeks.
Beck Depression Inventory
Prazo: From enrollment to end of treatment at 8 weeks.

This scale has a total of 21 items. Each item is scored from 0-3 points, and the total score ranges from 0-63 points. The higher the score, the higher the degree of depression.

From enrollment to end of treatment at 8 weeks.
Beck Anxiety Inventory
Prazo: From enrollment to end of treatment at 8 weeks.

Beck Anxiety Inventory is a 21-item self-reported questionnaire which measures the existenceand severity of symptoms of anxiety. Each of the 21 items on BAI tool represents an anxiety symptom. A total score of 0 - 7 is interpreted as a "Minimal" level of anxiety; 8 - 15 as "Mild"; 16 - 25 as "Moderate", and 26 - 63 as "Severe".

From enrollment to end of treatment at 8 weeks.
Harvard Flourishing Measure
Prazo: From enrollment to end of treatment at 8 weeks.

12 questions, rating from 0 to 10 per question, sum score to calculate the 'flourish measure' will be used.

From enrollment to end of treatment at 8 weeks.
NIH Toolbox Cognitive Battery
Prazo: From enrollment to end of treatment at 8 weeks.

Cognitive function will be assessed using the NIH Toolbox Cognition Battery, administered on an iPad.

From enrollment to end of treatment at 8 weeks.
Ecological Momentary Assessments (EMAs) w/ MindLamp
Prazo: From enrollment to end of treatment at 8 weeks.

Once-daily questions (EMAs) about mood and sleep will be sent via the MindLamp smartphone app.

From enrollment to end of treatment at 8 weeks.
Switching Stroop Test
Prazo: From enrollment to end of treatment at 8 weeks.

Stroop task measures response inhibition or response interference control. Participants will be shown a series of word colors that are either congruent or incongruent with the color of the word itself. The participant will be asked to respond to the color of the word and not the word itself. Responses are made with the keyboard. The incongruent condition is the more difficult condition of the two. Reaction time is recorded and a cost score is calculated, with shorter cost scores indicating better performance.

From enrollment to end of treatment at 8 weeks.
Penn Conditional Exclusion Test
Prazo: From enrollment to end of treatment at 8 weeks.

Neurocognition measure of reasoning & problem solving in PennCNB. Scores will be transformed into z-scores. The key score will assess perseverative errors. Lowest score = 0, no max score. A higher score is correlated with worse performance, i.e. more perseverative errors.

From enrollment to end of treatment at 8 weeks.
Flanker Inhibitory Control and Attention Test
Prazo: From enrollment to end of treatment at 8 weeks.

This test is designed to evaluate an individual's ability to concentrate their attention while inhibiting automatic response tendencies that could potentially hinder goal achievement. This is the percent correct outcome from this assessment.

From enrollment to end of treatment at 8 weeks.
Face Name Associated Memory Exam
Prazo: From enrollment to end of treatment at 8 weeks.

The score ranges from 0 to 130, with a higher score indicating better speed of processing.

From enrollment to end of treatment at 8 weeks.
9-hole pegboard dexterity test
Prazo: From enrollment to end of treatment at 8 weeks.

The Nine-Hole Peg Test (9HPT) is used to measure finger dexterity in patients with various neurological diagnoses. Time to complete the test as quickly as possible

From enrollment to end of treatment at 8 weeks.
NIH Toolbox Cognitive Battery
Prazo: From enrollment to end of treatment at 8 weeks.

The Nine-Hole Peg Test (9HPT) is used to measure finger dexterity in patients with various neurological diagnoses. Time to complete the test as quickly as possible

From enrollment to end of treatment at 8 weeks.
Neurite Orientation Dispersion and Density Imaging (NODDI)
Prazo: From enrollment to end of treatment at 8 weeks.

Assessing synaptic plasticity in MRI

From enrollment to end of treatment at 8 weeks.

Medidas de resultados secundários

Medida de resultado
Descrição da medida
Prazo
Complex Working Memory Span task
Prazo: From enrollment to end of treatment at 8 weeks.

Measures ability to juggle holding information (storage) and doing something with it (processing) at the same time. Percent accuracy will be reported.

From enrollment to end of treatment at 8 weeks.
fMRI
Prazo: From enrollment to end of treatment at 8 weeks.

Mean BOLD signal

From enrollment to end of treatment at 8 weeks.

Colaboradores e Investigadores

É aqui que você encontrará pessoas e organizações envolvidas com este estudo.

Patrocinador

Colaboradores

Investigadores

  • Investigador principal: Godfrey Pearlson, MD, Yale University

Datas de registro do estudo

Essas datas acompanham o progresso do registro do estudo e os envios de resumo dos resultados para ClinicalTrials.gov. Os registros do estudo e os resultados relatados são revisados ​​pela National Library of Medicine (NLM) para garantir que atendam aos padrões específicos de controle de qualidade antes de serem publicados no site público.

Datas Principais do Estudo

Início do estudo (Estimado)

1 de outubro de 2026

Conclusão Primária (Estimado)

1 de abril de 2028

Conclusão do estudo (Estimado)

1 de abril de 2028

Datas de inscrição no estudo

Enviado pela primeira vez

26 de fevereiro de 2026

Enviado pela primeira vez que atendeu aos critérios de CQ

26 de fevereiro de 2026

Primeira postagem (Real)

4 de março de 2026

Atualizações de registro de estudo

Última Atualização Postada (Real)

24 de setembro de 2026

Última atualização enviada que atendeu aos critérios de controle de qualidade

22 de setembro de 2026

Última verificação

1 de junho de 2026

Mais Informações

Termos relacionados a este estudo

Outros números de identificação do estudo

  • HHC-2025-0200

Plano para dados de participantes individuais (IPD)

Planeja compartilhar dados de participantes individuais (IPD)?

NÃO

Informações sobre medicamentos e dispositivos, documentos de estudo

Estuda um medicamento regulamentado pela FDA dos EUA

Sim

Estuda um produto de dispositivo regulamentado pela FDA dos EUA

Não

Essas informações foram obtidas diretamente do site clinicaltrials.gov sem nenhuma alteração. Se você tiver alguma solicitação para alterar, remover ou atualizar os detalhes do seu estudo, entre em contato com register@clinicaltrials.gov. Assim que uma alteração for implementada em clinicaltrials.gov, ela também será atualizada automaticamente em nosso site .