The Psilocybin Record
Record / Aug 2026 / Clinical trials

Psilocybin clinical trials

Could you join one? The honest answer first: most of the 323 registered trials are not taking new participants. 132 of them are in the recruiting stage, and your condition is the fastest way to search them. Trial starts have grown roughly seven-fold since 2019.

Sources: ClinicalTrials.gov, EU CTIS, and ISRCTN · updated 20 Aug 2026 · 323 records

Registry data is reported by sponsors and shown as filed.

ClinicalTrials.gov data courtesy of the U.S. National Library of Medicine.

Where the trials run

60 places host psilocybin trials. Every place links to its legal record.

Show all 60 places

Find a trial

Filter by condition, status, country, and stage. Each title opens the trial’s own registry page, where the eligibility rules are spelled out in full.

Depression

117 trials · 44 recruiting

PTSD & trauma

22 trials · 11 recruiting

Addiction

43 trials · 21 recruiting

Anxiety

6 trials · 3 recruiting

Cancer & end of life

15 trials · 5 recruiting

OCD

10 trials · 3 recruiting

Eating disorders

8 trials · 2 recruiting

Pain & headache

19 trials · 8 recruiting

Neurological

14 trials · 5 recruiting

Other conditions

13 trials · 7 recruiting

Healthy & mechanism

56 trials · 23 recruiting
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Common questions

Can I join a trial?
132 trials are in the recruiting stage; 91 of them list sites. Joining runs through each trial's own team: open the trial, follow its registry link, and contact the listed site. Eligibility is set per trial.
Is there a trial for my condition?
Depression is the most studied condition with 117 trials, then addiction with 53, PTSD with 31, and pain with 26. A trial studying more than one condition is counted under each. Every condition is a filter in the register above.
Where are the results?
The register records status, not verdicts. Of 90 completed trials, 19 have results posted to the registry and 5 name a published results paper. A further 57 have papers that cite the trial without reporting its results, and 9 have nothing on record. We count a trial as having results only where the registry says so.
Trials run in places where psilocybin is illegal. How?
Clinical trials operate under research authorizations that are separate from a place’s general law. The atlas above links every place to its legal record on this site.
What do the phases mean?
Phase 1 tests safety and dosing. Phases 2 and 3 test whether the treatment works against comparison groups; 165 trials here are in phase 2 or 3. No psilocybin trial has reached phase 4, the after-approval stage.
Is the field growing?
Trial starts have grown roughly seven-fold since 2019: 8 started in 2019, 58 in 2025, and 65 are already listed for 2026. Start dates include scheduled starts from the registries.
Where does this data come from?
ClinicalTrials.gov, the EU CTIS, and ISRCTN, refreshed on a weekly cadence. ClinicalTrials.gov data is courtesy of the U.S. National Library of Medicine. The corpus behind this page was last updated 20 Aug 2026.

Every figure here is counted from the register at build time. This site makes no medical claims about psilocybin.