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Safety and Tolerability Trial of Psilocybin in Healthy Older Adults

Safety and Tolerability Trial of Psilocybin in Healthy Older Adults

Recruiting
65-85 years
All
Phase 1

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Overview

This study plans to learn more about the safety and tolerability of psychedelic administration (psilocybin) in healthy older adults ages 65-85.

Description

The purpose of this study is to learn whether psilocybin, a psychedelic compound, can be given safely to older adults. We want to understand how psilocybin affects the body and mind, including blood pressure, heart rhythm, and mood. We also want to see how the body processes psilocybin (how quickly it is absorbed and cleared) and whether it affects thinking, memory, or wellbeing.

  • Primary Objective: Evaluate the safety and tolerability of psychedelic administration in two cohorts of healthy older adults.
    • Cohort 1a Psilocybin Moderate Dose: 2 doses of oral psilocybin (10mg and then 25mg) 30 days apart.
    • Cohort 1b Psilocybin High Dose: 2 doses of oral psilocybin (15mg and then 30mg) 30 days apart.
  • Secondary Objectives: Evaluate the pharmacokinetics of Psilocybin for each Cohort of healthy older adults.
  • Exploratory Objectives: Evaluate patient-reported outcomes related to Psilocybin administration (e.g., psychedelic experience and well-being) in each Cohort.

Assess the relationships between the pharmacokinetic profile, safety endpoints, and patient-reported outcomes in each Cohort.

Eligibility

Inclusion Criteria:

  • Aged 65-85 years \& be male, female, or non-binary
  • Generally healthy
  • Have an identified support person
  • Capacity to Consent

Exclusion Criteria:

  • Unstable medical condition
  • Risk for hypertensive crisis (screening blood pressure \>140/90 mmHg)
  • Significant central nervous system (CNS) pathology
  • Primary psychotic or affective psychotic disorders
  • Family history of psychotic or serious bipolar spectrum illnesses
  • High risk of adverse emotional or behavioral reaction
  • Active substance use disorders (SUDs)
  • Extensive use of serotonergic hallucinogens
  • High risk of completed suicide
  • History of hallucinogen persisting perception disorder (HPPD)
  • Concurrent Medications: centrally-acting serotonergic agents; antipsychotics; certain mood stabilizers, aldehyde dehydrogenase inhibitors; significant inhibitors of UGT 1A9 or UGT 1A10
  • Certain psychiatric conditions
  • Presence of relevant finding (psychological, physical symptom, medication) prior to dosing that would make a participant unsuitable for the study

Study details
    Healthy Volunteer
    Older Adults (65-85 Years)

NCT07516405

University of Colorado, Denver

13 May 2026

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FAQs

Learn more about clinical trials

What is a clinical trial?

A clinical trial is a study designed to test specific interventions or treatments' effectiveness and safety, paving the way for new, innovative healthcare solutions.

Why should I take part in a clinical trial?

Participating in a clinical trial provides early access to potentially effective treatments and directly contributes to the healthcare advancements that benefit us all.

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The duration of clinical trials varies. Some trials last weeks, some years, depending on the phase and intention of the trial.

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Compensation varies per trial. Some offer payment or reimbursement for time and travel, while others may not.

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Clinical trials follow strict ethical guidelines and protocols to safeguard participants' health. They are closely monitored and safety reviewed regularly.
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