# Efficacy of Psilocybin in OCD: a Double-Blind, Placebo-Controlled Study.

> **NCT03356483** · PHASE1 · COMPLETED · sponsor: **Yale University** · enrollment: 31 (actual)

## Conditions studied

- Obsessive-Compulsive Disorder

## Interventions

- **DRUG:** Psilocybin (0.25mg/kg)
- **DRUG:** Niacin (250mg)

## Key facts

- **NCT ID:** NCT03356483
- **Lead sponsor:** Yale University
- **Sponsor class:** OTHER
- **Phase:** PHASE1
- **Study type:** INTERVENTIONAL
- **Status:** COMPLETED
- **Start date:** 2018-11-13
- **Primary completion:** 2024-07-25
- **Final completion:** 2024-07-25
- **Target enrollment:** 31 (ACTUAL)
- **Last updated:** 2024-11-20

## Collaborators

- [object Object]
- [object Object]

## Primary source

ClinicalTrials.gov registry: https://clinicaltrials.gov/study/NCT03356483

## Citation

> US National Library of Medicine, ClinicalTrials.gov registration NCT03356483, "Efficacy of Psilocybin in OCD: a Double-Blind, Placebo-Controlled Study.". Retrieved via AI Analytics 2026-06-09 from https://api.ai-analytics.org/clinical/NCT03356483. Licensed CC0.

---

*[Clinical trials dataset](/datasets/clinical-trials) · CC0 1.0*