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Safety and Tolerability Trial of Psilocybin in Healthy Older Adults

A Multicenter Phase 1 Safety and Tolerability Trial of Psilocybin in Healthy Older Adults

Status
Recruiting
Phases
Phase 1
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT07516405
Acronym
Psil-Pk
Enrollment
40
Registered
2026-04-08
Start date
2026-04-01
Completion date
2028-03-01
Last updated
2026-05-11

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Healthy Volunteer, Older Adults (65-85 Years)

Keywords

healthy older adults ages 65-85, psilocybin safety, psilocybin tolerability

Brief summary

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

Detailed 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.

Interventions

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.

Sponsors

University of Colorado, Denver
Lead SponsorOTHER
National Institute on Aging (NIA)
CollaboratorNIH
University of California, San Francisco
CollaboratorOTHER
Emory University
CollaboratorOTHER
Dana-Farber Cancer Institute
CollaboratorOTHER
NYU Langone Health
CollaboratorOTHER
University of Nebraska
CollaboratorOTHER

Study design

Allocation
NA
Intervention model
SINGLE_GROUP
Primary purpose
OTHER
Masking
NONE

Intervention model description

Cohort model: each cohort will receive 2 escalating doses of psilocybin 30 days apart. The first 20 participants will follow this schema: Cohort 1a: Psilocybin Moderate Dose: 2 doses of oral psilocybin (10mg and then 25mg) 30 days apart. If tolerated in the first 20 participants, the second 20 participants will follow this schema: Cohort 1b: Psilocybin High Dose: 2 doses of oral psilocybin (15mg and then 30mg) 30 days apart.

Eligibility

Sex/Gender
ALL
Age
65 Years to 85 Years
Healthy volunteers
Yes

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

Design outcomes

Primary

MeasureTime frameDescription
Adverse Eventsup to 14 weeksFrequency and severity of adverse events; Proportion of participants who complete the intervention, do not advance to the second dose, and who withdraw early from the trial

Secondary

MeasureTime frameDescription
Total drug exposure (Area Under the Curve, AUC)Two separate medication administration days 30 days apart (Week 2 & Week 6 of study participation)Total drug exposure measured with blood samples - Pharmacokinetics
Elimination Half-lifeTwo separate medication administration days 30 days apart (Week 2 & Week 6 of study participation)Elimination Half-life measured with blood samples - Pharmacokinetics
Maximum concentration (Cmax)Two separate medication administration days 30 days apart (Week 2 & Week 6 of study participation)Maximum plasma concentration (Cmax) measured with blood samples - Pharmacokinetics
Minimum concentration (Cmin)Two separate medication administration days 30 days apart (Week 2 & Week 6 of study participation)Minimum plasma concentration (Cmin) measured with blood samples - Pharmacokinetics

Countries

United States

Contacts

CONTACTMary P Mancuso, MA (dual degrees)
inspire@cuanschutz.edu3037245729
CONTACTLila Harris, BS
lila.m.harris@cuanschutz.edu

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: May 12, 2026