Psilocybin-Research.comSearchable psilocybin and psilocin bibliometric database.Countries and organisations
Explore psilocybin trials by country, sponsor and research facility. Compare registry status, study-start trends, conditions and mapped research sites.
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Explore registry geography and organisations
16 trials match this view; 11 mapped facilities. Latest indexed registry check Oct 9, 2026 01:24 UTC. Country membership uses reported locations, including locations without coordinates; Mapped-facility counts cover all sites of matching trials, including international sites, and require valid coordinates.
Enrollment sum: 429 across 16 records with a reported count. Planned and actual counts are mixed; this is not a count of unique treated participants.
Recorded study-start years
Current indexed registry status
Reported research conditions
Counts describe indexed registry records, not efficacy or total research activity. A trial can count under several conditions or countries. Unknown dates are excluded from the start-year chart; future years reflect planned starts. Stopped studies may reflect recruitment, funding or strategy and are not automatically treatment failures.
Matching trial records
| Trial | Sponsor and phase | Status | Enrollment | Start / primary completion / completion | Research workflow |
|---|---|---|---|---|---|
| The Efficacy of Psilocybin Therapy for Depression in Parkinson's DiseaseDepression · Parkinson's Disease (PD) | Yale University PHASE2 | Recruiting Registry updated 2026-09-28 | 40 ESTIMATED | 2026-07-10 2030-07 2030-07 | |
| Effects of Psilocybin Microdosing on Cognition, Mood and Quality of Life: A Pilot StudyPsychedelic Microdosing Effects on Mood, Cognition, Subjective Well-being and MRI | Yale University EARLY_PHASE1 | Not yet recruiting Registry updated 2026-09-24 | 20 ESTIMATED | 2026-10-01 2028-04-01 2028-04-01 | |
| Psilocybin in Chronic Low Back Pain: An Integrative Study of Lab-Based Mechanisms and Real-World Physical Therapy OutcomesChronic Low Back Pain (CLBP) · Physical Therapy · Psilocybin | Yale University PHASE2 | Not yet recruiting Registry updated 2026-08-19 | 45 ESTIMATED | 2026-10 2029-06 2029-06 | |
| Psilocybin as a Treatment for Chronic Pain in SmokersSmokers With Chronic Pain | Yale University EARLY_PHASE1 | Recruiting Registry updated 2026-08-03 | 10 ESTIMATED | 2026-07-06 2027-10-01 2027-12-01 | |
| Mechanistic Studies of Psilocybin in Headache DisordersMigraine | Yale University EARLY_PHASE1 | Recruiting Registry updated 2026-07-13 | 50 ESTIMATED | 2025-05-19 2027-12-31 2027-12-31 | |
| The Effects of Psilocybin on Social ConnectednessLoneliness · Grief | Yale University PHASE1 | Not yet recruiting Registry updated 2026-07-09 | 51 ESTIMATED | 2026-08-31 2031-12-15 2031-12-15 | |
| Computationally, Electrophysiologically, and Qualitatively Characterizing Serotonergic Psychedelics; Transdiagnostic Therapeutic and Pro-Psychotic EffectsOCD · Major Depressive Disorder (MDD) · Alcohol Use Disorder (AUD) · Healthy Volunteer · Migraine · PTSD · PTSD - Post Traumatic Stress Disorder · Addiction · Tobacco Use Disorder · Obsessive Compulsive Disorder (OCD) · Opioid Use Disorder | Yale University Phase not reported | Terminated Registry updated 2026-07-09 | 5 ACTUAL | 2024-12-12 2026-06-14 2026-06-14 | |
| Exploration of Synaptotrophic Effects of Psilocybin in Opioid Use Disorder (OUD)Opioid Use Disorder | Yale University PHASE1 | Recruiting Registry updated 2026-07-07 | 12 ESTIMATED | 2025-05-28 2027-01 2027-01 | |
| Effects of Repeated Dosing of Psilocybin on Obsessive-Compulsive Disorder: A Randomized, Waitlist-Controlled StudyObsessive-Compulsive Disorder | Yale University PHASE1 | Active, not recruiting Registry updated 2026-06-04 | 28 ACTUAL | 2023-07-20 2026-02-17 2027-02 | |
| Safety, Feasibility, and Tolerability of Psilocybin Treatment for Individuals With Functional Impairment Related to Mood, Anxiety, Trauma and/or Addiction Symptoms: An Open-label Proof-of-concept StudyTransdiagnostic · Depression - Major Depressive Disorder · Anxiety · PTSD Symptoms · PTSD · Substance Use · Substance Use Disorder (SUD) · OCD | Yale University PHASE1 | Recruiting Registry updated 2026-03-11 | 50 ESTIMATED | 2024-10-17 2027-12 2027-12 | |
| Psilocybin - Induced Neuroplasticity in the Treatment of Major Depressive DisorderMajor Depressive Disorder | Yale University PHASE1 | Active, not recruiting Registry updated 2025-11-05 | 18 ESTIMATED | 2018-02-27 2021-07-08 2026-09 | |
| Psilocybin Treatment in Obsessive-Compulsive Disorder: a Preliminary Efficacy Study and Exploratory Investigation of Neural Correlates.Obsessive-Compulsive Disorder | Yale University PHASE1 | Completed Registry updated 2024-11-20 | 31 ACTUAL | 2018-11-13 2024-07-25 2024-07-25 | |
| Repeat Dosing of Psilocybin in Headache DisordersMigraine Headache | Yale University PHASE1 | Completed Registry updated 2024-02-09 | 18 ACTUAL | 2021-08-10 2023-11-05 2023-11-05 | |
| Safety and Efficacy of Psilocybin for the Treatment of Headache DisordersCluster Headache | Yale University PHASE1 | Completed Registry updated 2023-12-15 | 25 ACTUAL | 2016-12-05 2022-06-30 2022-10-21 | |
| Safety and Efficacy of Psilocybin for the Treatment of Headache Disorders: Sub-Study IIPost-Traumatic Headache | Yale University PHASE1 | Terminated Registry updated 2023-10-12 | 12 ACTUAL | 2019-03-28 2023-06-27 2023-06-27 | |
| Safety and Efficacy of Psilocybin for the Treatment of Headache Disorders: Sub-Study IMigraine Headache | Yale University PHASE1 | Completed Registry updated 2023-10-12 | 14 ACTUAL | 2017-11-01 2021-04-30 2021-10-31 |
Reported research facilities
Yale UniversityNew Haven, Connecticut, United States
Olin Neuropsychiatry Research CenterHartford, Connecticut, United States
Connecticut Mental Health CenterNew Haven, Connecticut, United States
Department of Veterans AffairsWest Haven, Connecticut, United States
VA Connecticut Healthcare SystemWest Haven, Connecticut, United States
Connecticut Mental Health CenterHamden, Connecticut, United States
West Haven VA Medical CenterWest Haven, Connecticut, United States
Enact Research Collaborative (40 Temple St, 4th Floor)New Haven, Connecticut, United States
Yale Program for Psychedelic ResearchNew Haven, Connecticut, United States
Connecticut Mental Health Center - Yale School of MedicineNew Haven, Connecticut, United States
VA Connecticut Healthcare System, West Haven CampusWest Haven, Connecticut, United States
This list includes mapped sites of matching trials, including international sites; locations without usable coordinates are omitted. Facilities are registry-reported trial sites, not an independently verified clinic or research-centre directory. Current services and contact details must be checked at the source.