Psilocybin therapy for treating depression in Parkinson's disease

The Efficacy of Psilocybin Therapy for Depression in Parkinson's Disease

Phase 2 Interventional University of California, San Francisco · NCT06455293

This study is testing if psilocybin therapy can help people with Parkinson's disease who are also dealing with depression feel better.

Quick facts

PhasePhase 2
Study typeInterventional
Enrollment60 (estimated)
Ages40 Years to 80 Years
SexAll
SponsorUniversity of California, San Francisco Academic / other
Locations1 site (San Francisco, California)
Trial IDNCT06455293 on ClinicalTrials.gov

What this trial studies

This randomized controlled trial investigates the efficacy of oral psilocybin therapy in individuals with Parkinson's disease who are experiencing depression. The study will enroll 60 participants aged 40 to 80 with early to moderate stage Parkinson's disease and moderate or greater depression severity. Participants will undergo two drug administration sessions with varying doses of psilocybin, accompanied by psychotherapy sessions before and after each administration. Clinical assessments, neuroimaging, and biomarker analysis will be conducted to evaluate changes in depression and other symptoms over a follow-up period of three months.

Who should consider this trial

Good fit: Ideal candidates are individuals aged 40 to 80 with diagnosed early to moderate stage Parkinson's disease and moderate to severe depression.

Not a fit: Patients with significant cognitive impairment or psychotic symptoms may not benefit from this study.

Why it matters

Potential benefit: If successful, this therapy could significantly improve depressive symptoms in patients with Parkinson's disease, enhancing their overall quality of life.

How similar studies have performed: While psilocybin therapy is a novel approach for this specific population, similar studies have shown promising results in treating depression with psilocybin in other contexts.

Eligibility criteria

Show full inclusion / exclusion criteria
Inclusion Criteria:

* Age 40 to 80
* Comfortable speaking and writing in English
* Have neurologist-diagnosed idiopathic Parkinson's disease (PD), Hoehn and Yahr stages 1 to 3 during an "on" phase (time when medication/DBS for parkinsonian motor feature, including bradykinesia and rigidity is in effect)
* Currently experiencing depressive symptoms
* Able to attend all in-person visits at UCSF as well as virtual visits
* Have a primary care provider, neurologist, or psychiatrist who is actively managing or coordinating

Exclusion Criteria:

* Psychotic symptoms involving loss of insight
* Significant cognitive impairment
* Regular use of medications that may have problematic interactions with psilocybin
* A health condition that makes this study unsafe or unfeasible, determined by study physicians

Where this trial is running

San Francisco, California

Study contacts

How to participate

  1. Review the eligibility criteria above with your treating physician.
  2. Visit the official trial page on ClinicalTrials.gov for the most current contact information and recruitment status.
  3. Contact the listed study coordinator or principal investigator to request pre-screening. Pre-screening is free and never obligates you to enroll.
Conditions Parkinson DiseaseDepressionPsilocybinPsilocybin therapyMovement disorder
Last reviewed 2026-06-13 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.