# Direct Comparison of Altered States of Consciousness Induced by LSD and Psilocybin

> **NCT03604744** · EARLY_PHASE1 · COMPLETED · sponsor: **University Hospital, Basel, Switzerland** · enrollment: 28 (actual)

## Conditions studied

- Healthy

## Interventions

- **DRUG:** LSD
- **DRUG:** LSD
- **DRUG:** Psilocybin
- **DRUG:** Psilocybin

## Key facts

- **NCT ID:** NCT03604744
- **Lead sponsor:** University Hospital, Basel, Switzerland
- **Sponsor class:** OTHER
- **Phase:** EARLY_PHASE1
- **Study type:** INTERVENTIONAL
- **Status:** COMPLETED
- **Start date:** 2019-03-27
- **Primary completion:** 2021-04-10
- **Final completion:** 2021-04-15
- **Target enrollment:** 28 (ACTUAL)
- **Last updated:** 2021-04-27


## Primary source

ClinicalTrials.gov registry: https://clinicaltrials.gov/study/NCT03604744

## Citation

> US National Library of Medicine, ClinicalTrials.gov registration NCT03604744, "Direct Comparison of Altered States of Consciousness Induced by LSD and Psilocybin". Retrieved via AI Analytics 2026-05-24 from https://api.ai-analytics.org/clinical/NCT03604744. Licensed CC0.

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